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1 | /* |
2 | * BSS client mode implementation |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
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 | |
14 | #include <linux/delay.h> |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> |
17 | #include <linux/if_arp.h> |
18 | #include <linux/etherdevice.h> |
19 | #include <linux/moduleparam.h> |
20 | #include <linux/rtnetlink.h> |
21 | #include <linux/pm_qos.h> |
22 | #include <linux/crc32.h> |
23 | #include <linux/slab.h> |
24 | #include <linux/export.h> |
25 | #include <net/mac80211.h> |
26 | #include <asm/unaligned.h> |
27 | |
28 | #include "ieee80211_i.h" |
29 | #include "driver-ops.h" |
30 | #include "rate.h" |
31 | #include "led.h" |
32 | |
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 |
40 | |
41 | static int max_nullfunc_tries = 2; |
42 | module_param(max_nullfunc_tries, int, 0644); |
43 | MODULE_PARM_DESC(max_nullfunc_tries, |
44 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); |
45 | |
46 | static int max_probe_tries = 5; |
47 | module_param(max_probe_tries, int, 0644); |
48 | MODULE_PARM_DESC(max_probe_tries, |
49 | "Maximum probe tries before disconnecting (reason 4)."); |
50 | |
51 | /* |
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. |
58 | */ |
59 | #define IEEE80211_BEACON_LOSS_COUNT 7 |
60 | |
61 | /* |
62 | * Time the connection can be idle before we probe |
63 | * it to see if we can still talk to the AP. |
64 | */ |
65 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
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 | */ |
71 | static int probe_wait_ms = 500; |
72 | module_param(probe_wait_ms, int, 0644); |
73 | MODULE_PARM_DESC(probe_wait_ms, |
74 | "Maximum time(ms) to wait for probe response" |
75 | " before disconnecting (reason 4)."); |
76 | |
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 | |
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 | |
90 | #define TMR_RUNNING_TIMER 0 |
91 | #define TMR_RUNNING_CHANSW 1 |
92 | |
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 | */ |
99 | enum rx_mgmt_action { |
100 | /* no action required */ |
101 | RX_MGMT_NONE, |
102 | |
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, |
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, |
117 | |
118 | /* used when a processed beacon causes a deauth */ |
119 | RX_MGMT_CFG80211_TX_DEAUTH, |
120 | }; |
121 | |
122 | /* utils */ |
123 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
124 | { |
125 | lockdep_assert_held(&ifmgd->mtx); |
126 | } |
127 | |
128 | /* |
129 | * We can have multiple work items (and connection probing) |
130 | * scheduling this timer, but we need to take care to only |
131 | * reschedule it when it should fire _earlier_ than it was |
132 | * asked for before, or if it's not pending right now. This |
133 | * function ensures that. Note that it then is required to |
134 | * run this function for all timeouts after the first one |
135 | * has happened -- the work that runs from this timer will |
136 | * do that. |
137 | */ |
138 | static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout) |
139 | { |
140 | ASSERT_MGD_MTX(ifmgd); |
141 | |
142 | if (!timer_pending(&ifmgd->timer) || |
143 | time_before(timeout, ifmgd->timer.expires)) |
144 | mod_timer(&ifmgd->timer, timeout); |
145 | } |
146 | |
147 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
148 | { |
149 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
150 | return; |
151 | |
152 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
153 | return; |
154 | |
155 | mod_timer(&sdata->u.mgd.bcn_mon_timer, |
156 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
157 | } |
158 | |
159 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
160 | { |
161 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
162 | |
163 | if (unlikely(!sdata->u.mgd.associated)) |
164 | return; |
165 | |
166 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
167 | return; |
168 | |
169 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
170 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
171 | |
172 | ifmgd->probe_send_count = 0; |
173 | } |
174 | |
175 | static int ecw2cw(int ecw) |
176 | { |
177 | return (1 << ecw) - 1; |
178 | } |
179 | |
180 | static u32 chandef_downgrade(struct cfg80211_chan_def *c) |
181 | { |
182 | u32 ret; |
183 | int tmp; |
184 | |
185 | switch (c->width) { |
186 | case NL80211_CHAN_WIDTH_20: |
187 | c->width = NL80211_CHAN_WIDTH_20_NOHT; |
188 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
189 | break; |
190 | case NL80211_CHAN_WIDTH_40: |
191 | c->width = NL80211_CHAN_WIDTH_20; |
192 | c->center_freq1 = c->chan->center_freq; |
193 | ret = IEEE80211_STA_DISABLE_40MHZ | |
194 | IEEE80211_STA_DISABLE_VHT; |
195 | break; |
196 | case NL80211_CHAN_WIDTH_80: |
197 | tmp = (30 + c->chan->center_freq - c->center_freq1)/20; |
198 | /* n_P40 */ |
199 | tmp /= 2; |
200 | /* freq_P40 */ |
201 | c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; |
202 | c->width = NL80211_CHAN_WIDTH_40; |
203 | ret = IEEE80211_STA_DISABLE_VHT; |
204 | break; |
205 | case NL80211_CHAN_WIDTH_80P80: |
206 | c->center_freq2 = 0; |
207 | c->width = NL80211_CHAN_WIDTH_80; |
208 | ret = IEEE80211_STA_DISABLE_80P80MHZ | |
209 | IEEE80211_STA_DISABLE_160MHZ; |
210 | break; |
211 | case NL80211_CHAN_WIDTH_160: |
212 | /* n_P20 */ |
213 | tmp = (70 + c->chan->center_freq - c->center_freq1)/20; |
214 | /* n_P80 */ |
215 | tmp /= 4; |
216 | c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; |
217 | c->width = NL80211_CHAN_WIDTH_80; |
218 | ret = IEEE80211_STA_DISABLE_80P80MHZ | |
219 | IEEE80211_STA_DISABLE_160MHZ; |
220 | break; |
221 | default: |
222 | case NL80211_CHAN_WIDTH_20_NOHT: |
223 | WARN_ON_ONCE(1); |
224 | c->width = NL80211_CHAN_WIDTH_20_NOHT; |
225 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
226 | break; |
227 | } |
228 | |
229 | WARN_ON_ONCE(!cfg80211_chandef_valid(c)); |
230 | |
231 | return ret; |
232 | } |
233 | |
234 | static u32 |
235 | ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, |
236 | struct ieee80211_supported_band *sband, |
237 | struct ieee80211_channel *channel, |
238 | const struct ieee80211_ht_operation *ht_oper, |
239 | const struct ieee80211_vht_operation *vht_oper, |
240 | struct cfg80211_chan_def *chandef, bool verbose) |
241 | { |
242 | struct cfg80211_chan_def vht_chandef; |
243 | u32 ht_cfreq, ret; |
244 | |
245 | chandef->chan = channel; |
246 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; |
247 | chandef->center_freq1 = channel->center_freq; |
248 | chandef->center_freq2 = 0; |
249 | |
250 | if (!ht_oper || !sband->ht_cap.ht_supported) { |
251 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
252 | goto out; |
253 | } |
254 | |
255 | chandef->width = NL80211_CHAN_WIDTH_20; |
256 | |
257 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, |
258 | channel->band); |
259 | /* check that channel matches the right operating channel */ |
260 | if (channel->center_freq != ht_cfreq) { |
261 | /* |
262 | * It's possible that some APs are confused here; |
263 | * Netgear WNDR3700 sometimes reports 4 higher than |
264 | * the actual channel in association responses, but |
265 | * since we look at probe response/beacon data here |
266 | * it should be OK. |
267 | */ |
268 | if (verbose) |
269 | sdata_info(sdata, |
270 | "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", |
271 | channel->center_freq, ht_cfreq, |
272 | ht_oper->primary_chan, channel->band); |
273 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; |
274 | goto out; |
275 | } |
276 | |
277 | /* check 40 MHz support, if we have it */ |
278 | if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { |
279 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
280 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
281 | chandef->width = NL80211_CHAN_WIDTH_40; |
282 | chandef->center_freq1 += 10; |
283 | break; |
284 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
285 | chandef->width = NL80211_CHAN_WIDTH_40; |
286 | chandef->center_freq1 -= 10; |
287 | break; |
288 | } |
289 | } else { |
290 | /* 40 MHz (and 80 MHz) must be supported for VHT */ |
291 | ret = IEEE80211_STA_DISABLE_VHT; |
292 | goto out; |
293 | } |
294 | |
295 | if (!vht_oper || !sband->vht_cap.vht_supported) { |
296 | ret = IEEE80211_STA_DISABLE_VHT; |
297 | goto out; |
298 | } |
299 | |
300 | vht_chandef.chan = channel; |
301 | vht_chandef.center_freq1 = |
302 | ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, |
303 | channel->band); |
304 | vht_chandef.center_freq2 = 0; |
305 | |
306 | if (vht_oper->center_freq_seg2_idx) |
307 | vht_chandef.center_freq2 = |
308 | ieee80211_channel_to_frequency( |
309 | vht_oper->center_freq_seg2_idx, |
310 | channel->band); |
311 | |
312 | switch (vht_oper->chan_width) { |
313 | case IEEE80211_VHT_CHANWIDTH_USE_HT: |
314 | vht_chandef.width = chandef->width; |
315 | break; |
316 | case IEEE80211_VHT_CHANWIDTH_80MHZ: |
317 | vht_chandef.width = NL80211_CHAN_WIDTH_80; |
318 | break; |
319 | case IEEE80211_VHT_CHANWIDTH_160MHZ: |
320 | vht_chandef.width = NL80211_CHAN_WIDTH_160; |
321 | break; |
322 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: |
323 | vht_chandef.width = NL80211_CHAN_WIDTH_80P80; |
324 | break; |
325 | default: |
326 | if (verbose) |
327 | sdata_info(sdata, |
328 | "AP VHT operation IE has invalid channel width (%d), disable VHT\n", |
329 | vht_oper->chan_width); |
330 | ret = IEEE80211_STA_DISABLE_VHT; |
331 | goto out; |
332 | } |
333 | |
334 | if (!cfg80211_chandef_valid(&vht_chandef)) { |
335 | if (verbose) |
336 | sdata_info(sdata, |
337 | "AP VHT information is invalid, disable VHT\n"); |
338 | ret = IEEE80211_STA_DISABLE_VHT; |
339 | goto out; |
340 | } |
341 | |
342 | if (cfg80211_chandef_identical(chandef, &vht_chandef)) { |
343 | ret = 0; |
344 | goto out; |
345 | } |
346 | |
347 | if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { |
348 | if (verbose) |
349 | sdata_info(sdata, |
350 | "AP VHT information doesn't match HT, disable VHT\n"); |
351 | ret = IEEE80211_STA_DISABLE_VHT; |
352 | goto out; |
353 | } |
354 | |
355 | *chandef = vht_chandef; |
356 | |
357 | ret = 0; |
358 | |
359 | out: |
360 | /* don't print the message below for VHT mismatch if VHT is disabled */ |
361 | if (ret & IEEE80211_STA_DISABLE_VHT) |
362 | vht_chandef = *chandef; |
363 | |
364 | while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, |
365 | IEEE80211_CHAN_DISABLED)) { |
366 | if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { |
367 | ret = IEEE80211_STA_DISABLE_HT | |
368 | IEEE80211_STA_DISABLE_VHT; |
369 | goto out; |
370 | } |
371 | |
372 | ret |= chandef_downgrade(chandef); |
373 | } |
374 | |
375 | if (chandef->width != vht_chandef.width && verbose) |
376 | sdata_info(sdata, |
377 | "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); |
378 | |
379 | WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); |
380 | return ret; |
381 | } |
382 | |
383 | static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, |
384 | struct sta_info *sta, |
385 | const struct ieee80211_ht_operation *ht_oper, |
386 | const struct ieee80211_vht_operation *vht_oper, |
387 | const u8 *bssid, u32 *changed) |
388 | { |
389 | struct ieee80211_local *local = sdata->local; |
390 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
391 | struct ieee80211_supported_band *sband; |
392 | struct ieee80211_channel *chan; |
393 | struct cfg80211_chan_def chandef; |
394 | u16 ht_opmode; |
395 | u32 flags; |
396 | enum ieee80211_sta_rx_bandwidth new_sta_bw; |
397 | int ret; |
398 | |
399 | /* if HT was/is disabled, don't track any bandwidth changes */ |
400 | if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) |
401 | return 0; |
402 | |
403 | /* don't check VHT if we associated as non-VHT station */ |
404 | if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
405 | vht_oper = NULL; |
406 | |
407 | if (WARN_ON_ONCE(!sta)) |
408 | return -EINVAL; |
409 | |
410 | chan = sdata->vif.bss_conf.chandef.chan; |
411 | sband = local->hw.wiphy->bands[chan->band]; |
412 | |
413 | /* calculate new channel (type) based on HT/VHT operation IEs */ |
414 | flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper, |
415 | vht_oper, &chandef, false); |
416 | |
417 | /* |
418 | * Downgrade the new channel if we associated with restricted |
419 | * capabilities. For example, if we associated as a 20 MHz STA |
420 | * to a 40 MHz AP (due to regulatory, capabilities or config |
421 | * reasons) then switching to a 40 MHz channel now won't do us |
422 | * any good -- we couldn't use it with the AP. |
423 | */ |
424 | if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && |
425 | chandef.width == NL80211_CHAN_WIDTH_80P80) |
426 | flags |= chandef_downgrade(&chandef); |
427 | if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && |
428 | chandef.width == NL80211_CHAN_WIDTH_160) |
429 | flags |= chandef_downgrade(&chandef); |
430 | if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && |
431 | chandef.width > NL80211_CHAN_WIDTH_20) |
432 | flags |= chandef_downgrade(&chandef); |
433 | |
434 | if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) |
435 | return 0; |
436 | |
437 | sdata_info(sdata, |
438 | "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", |
439 | ifmgd->bssid, chandef.chan->center_freq, chandef.width, |
440 | chandef.center_freq1, chandef.center_freq2); |
441 | |
442 | if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | |
443 | IEEE80211_STA_DISABLE_VHT | |
444 | IEEE80211_STA_DISABLE_40MHZ | |
445 | IEEE80211_STA_DISABLE_80P80MHZ | |
446 | IEEE80211_STA_DISABLE_160MHZ)) || |
447 | !cfg80211_chandef_valid(&chandef)) { |
448 | sdata_info(sdata, |
449 | "AP %pM changed bandwidth in a way we can't support - disconnect\n", |
450 | ifmgd->bssid); |
451 | return -EINVAL; |
452 | } |
453 | |
454 | switch (chandef.width) { |
455 | case NL80211_CHAN_WIDTH_20_NOHT: |
456 | case NL80211_CHAN_WIDTH_20: |
457 | new_sta_bw = IEEE80211_STA_RX_BW_20; |
458 | break; |
459 | case NL80211_CHAN_WIDTH_40: |
460 | new_sta_bw = IEEE80211_STA_RX_BW_40; |
461 | break; |
462 | case NL80211_CHAN_WIDTH_80: |
463 | new_sta_bw = IEEE80211_STA_RX_BW_80; |
464 | break; |
465 | case NL80211_CHAN_WIDTH_80P80: |
466 | case NL80211_CHAN_WIDTH_160: |
467 | new_sta_bw = IEEE80211_STA_RX_BW_160; |
468 | break; |
469 | default: |
470 | return -EINVAL; |
471 | } |
472 | |
473 | if (new_sta_bw > sta->cur_max_bandwidth) |
474 | new_sta_bw = sta->cur_max_bandwidth; |
475 | |
476 | if (new_sta_bw < sta->sta.bandwidth) { |
477 | sta->sta.bandwidth = new_sta_bw; |
478 | rate_control_rate_update(local, sband, sta, |
479 | IEEE80211_RC_BW_CHANGED); |
480 | } |
481 | |
482 | ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); |
483 | if (ret) { |
484 | sdata_info(sdata, |
485 | "AP %pM changed bandwidth to incompatible one - disconnect\n", |
486 | ifmgd->bssid); |
487 | return ret; |
488 | } |
489 | |
490 | if (new_sta_bw > sta->sta.bandwidth) { |
491 | sta->sta.bandwidth = new_sta_bw; |
492 | rate_control_rate_update(local, sband, sta, |
493 | IEEE80211_RC_BW_CHANGED); |
494 | } |
495 | |
496 | ht_opmode = le16_to_cpu(ht_oper->operation_mode); |
497 | |
498 | /* if bss configuration changed store the new one */ |
499 | if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
500 | *changed |= BSS_CHANGED_HT; |
501 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
502 | } |
503 | |
504 | return 0; |
505 | } |
506 | |
507 | /* frame sending functions */ |
508 | |
509 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, |
510 | struct ieee80211_supported_band *sband, |
511 | u32 *rates) |
512 | { |
513 | int i, j, count; |
514 | *rates = 0; |
515 | count = 0; |
516 | for (i = 0; i < supp_rates_len; i++) { |
517 | int rate = (supp_rates[i] & 0x7F) * 5; |
518 | |
519 | for (j = 0; j < sband->n_bitrates; j++) |
520 | if (sband->bitrates[j].bitrate == rate) { |
521 | *rates |= BIT(j); |
522 | count++; |
523 | break; |
524 | } |
525 | } |
526 | |
527 | return count; |
528 | } |
529 | |
530 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, |
531 | struct sk_buff *skb, u8 ap_ht_param, |
532 | struct ieee80211_supported_band *sband, |
533 | struct ieee80211_channel *channel, |
534 | enum ieee80211_smps_mode smps) |
535 | { |
536 | u8 *pos; |
537 | u32 flags = channel->flags; |
538 | u16 cap; |
539 | struct ieee80211_sta_ht_cap ht_cap; |
540 | |
541 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); |
542 | |
543 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
544 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
545 | |
546 | /* determine capability flags */ |
547 | cap = ht_cap.cap; |
548 | |
549 | switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
550 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
551 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
552 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
553 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
554 | } |
555 | break; |
556 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
557 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
558 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
559 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
560 | } |
561 | break; |
562 | } |
563 | |
564 | /* |
565 | * If 40 MHz was disabled associate as though we weren't |
566 | * capable of 40 MHz -- some broken APs will never fall |
567 | * back to trying to transmit in 20 MHz. |
568 | */ |
569 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { |
570 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
571 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
572 | } |
573 | |
574 | /* set SM PS mode properly */ |
575 | cap &= ~IEEE80211_HT_CAP_SM_PS; |
576 | switch (smps) { |
577 | case IEEE80211_SMPS_AUTOMATIC: |
578 | case IEEE80211_SMPS_NUM_MODES: |
579 | WARN_ON(1); |
580 | case IEEE80211_SMPS_OFF: |
581 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << |
582 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
583 | break; |
584 | case IEEE80211_SMPS_STATIC: |
585 | cap |= WLAN_HT_CAP_SM_PS_STATIC << |
586 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
587 | break; |
588 | case IEEE80211_SMPS_DYNAMIC: |
589 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << |
590 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
591 | break; |
592 | } |
593 | |
594 | /* reserve and fill IE */ |
595 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); |
596 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); |
597 | } |
598 | |
599 | static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, |
600 | struct sk_buff *skb, |
601 | struct ieee80211_supported_band *sband, |
602 | struct ieee80211_vht_cap *ap_vht_cap) |
603 | { |
604 | u8 *pos; |
605 | u32 cap; |
606 | struct ieee80211_sta_vht_cap vht_cap; |
607 | int i; |
608 | |
609 | BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); |
610 | |
611 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); |
612 | |
613 | /* determine capability flags */ |
614 | cap = vht_cap.cap; |
615 | |
616 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { |
617 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ; |
618 | cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
619 | } |
620 | |
621 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { |
622 | cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; |
623 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
624 | } |
625 | |
626 | /* |
627 | * Some APs apparently get confused if our capabilities are better |
628 | * than theirs, so restrict what we advertise in the assoc request. |
629 | */ |
630 | if (!(ap_vht_cap->vht_cap_info & |
631 | cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) |
632 | cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; |
633 | |
634 | if (!(ap_vht_cap->vht_cap_info & |
635 | cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC))) |
636 | cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 | |
637 | IEEE80211_VHT_CAP_RXSTBC_3 | |
638 | IEEE80211_VHT_CAP_RXSTBC_4); |
639 | |
640 | for (i = 0; i < 8; i++) { |
641 | int shift = i * 2; |
642 | u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift; |
643 | u16 ap_mcs, our_mcs; |
644 | |
645 | ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) & |
646 | mask) >> shift; |
647 | our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) & |
648 | mask) >> shift; |
649 | |
650 | if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED) |
651 | continue; |
652 | |
653 | switch (ap_mcs) { |
654 | default: |
655 | if (our_mcs <= ap_mcs) |
656 | break; |
657 | /* fall through */ |
658 | case IEEE80211_VHT_MCS_NOT_SUPPORTED: |
659 | vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask); |
660 | vht_cap.vht_mcs.rx_mcs_map |= |
661 | cpu_to_le16(ap_mcs << shift); |
662 | } |
663 | } |
664 | |
665 | /* reserve and fill IE */ |
666 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
667 | ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); |
668 | } |
669 | |
670 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
671 | { |
672 | struct ieee80211_local *local = sdata->local; |
673 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
674 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
675 | struct sk_buff *skb; |
676 | struct ieee80211_mgmt *mgmt; |
677 | u8 *pos, qos_info; |
678 | size_t offset = 0, noffset; |
679 | int i, count, rates_len, supp_rates_len; |
680 | u16 capab; |
681 | struct ieee80211_supported_band *sband; |
682 | struct ieee80211_chanctx_conf *chanctx_conf; |
683 | struct ieee80211_channel *chan; |
684 | u32 rates = 0; |
685 | |
686 | lockdep_assert_held(&ifmgd->mtx); |
687 | |
688 | rcu_read_lock(); |
689 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
690 | if (WARN_ON(!chanctx_conf)) { |
691 | rcu_read_unlock(); |
692 | return; |
693 | } |
694 | chan = chanctx_conf->def.chan; |
695 | rcu_read_unlock(); |
696 | sband = local->hw.wiphy->bands[chan->band]; |
697 | |
698 | if (assoc_data->supp_rates_len) { |
699 | /* |
700 | * Get all rates supported by the device and the AP as |
701 | * some APs don't like getting a superset of their rates |
702 | * in the association request (e.g. D-Link DAP 1353 in |
703 | * b-only mode)... |
704 | */ |
705 | rates_len = ieee80211_compatible_rates(assoc_data->supp_rates, |
706 | assoc_data->supp_rates_len, |
707 | sband, &rates); |
708 | } else { |
709 | /* |
710 | * In case AP not provide any supported rates information |
711 | * before association, we send information element(s) with |
712 | * all rates that we support. |
713 | */ |
714 | rates = ~0; |
715 | rates_len = sband->n_bitrates; |
716 | } |
717 | |
718 | skb = alloc_skb(local->hw.extra_tx_headroom + |
719 | sizeof(*mgmt) + /* bit too much but doesn't matter */ |
720 | 2 + assoc_data->ssid_len + /* SSID */ |
721 | 4 + rates_len + /* (extended) rates */ |
722 | 4 + /* power capability */ |
723 | 2 + 2 * sband->n_channels + /* supported channels */ |
724 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ |
725 | 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ |
726 | assoc_data->ie_len + /* extra IEs */ |
727 | 9, /* WMM */ |
728 | GFP_KERNEL); |
729 | if (!skb) |
730 | return; |
731 | |
732 | skb_reserve(skb, local->hw.extra_tx_headroom); |
733 | |
734 | capab = WLAN_CAPABILITY_ESS; |
735 | |
736 | if (sband->band == IEEE80211_BAND_2GHZ) { |
737 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
738 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
739 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
740 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
741 | } |
742 | |
743 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) |
744 | capab |= WLAN_CAPABILITY_PRIVACY; |
745 | |
746 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
747 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
748 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; |
749 | |
750 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
751 | memset(mgmt, 0, 24); |
752 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); |
753 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
754 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); |
755 | |
756 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { |
757 | skb_put(skb, 10); |
758 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
759 | IEEE80211_STYPE_REASSOC_REQ); |
760 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
761 | mgmt->u.reassoc_req.listen_interval = |
762 | cpu_to_le16(local->hw.conf.listen_interval); |
763 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, |
764 | ETH_ALEN); |
765 | } else { |
766 | skb_put(skb, 4); |
767 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
768 | IEEE80211_STYPE_ASSOC_REQ); |
769 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
770 | mgmt->u.assoc_req.listen_interval = |
771 | cpu_to_le16(local->hw.conf.listen_interval); |
772 | } |
773 | |
774 | /* SSID */ |
775 | pos = skb_put(skb, 2 + assoc_data->ssid_len); |
776 | *pos++ = WLAN_EID_SSID; |
777 | *pos++ = assoc_data->ssid_len; |
778 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); |
779 | |
780 | /* add all rates which were marked to be used above */ |
781 | supp_rates_len = rates_len; |
782 | if (supp_rates_len > 8) |
783 | supp_rates_len = 8; |
784 | |
785 | pos = skb_put(skb, supp_rates_len + 2); |
786 | *pos++ = WLAN_EID_SUPP_RATES; |
787 | *pos++ = supp_rates_len; |
788 | |
789 | count = 0; |
790 | for (i = 0; i < sband->n_bitrates; i++) { |
791 | if (BIT(i) & rates) { |
792 | int rate = sband->bitrates[i].bitrate; |
793 | *pos++ = (u8) (rate / 5); |
794 | if (++count == 8) |
795 | break; |
796 | } |
797 | } |
798 | |
799 | if (rates_len > count) { |
800 | pos = skb_put(skb, rates_len - count + 2); |
801 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
802 | *pos++ = rates_len - count; |
803 | |
804 | for (i++; i < sband->n_bitrates; i++) { |
805 | if (BIT(i) & rates) { |
806 | int rate = sband->bitrates[i].bitrate; |
807 | *pos++ = (u8) (rate / 5); |
808 | } |
809 | } |
810 | } |
811 | |
812 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
813 | /* 1. power capabilities */ |
814 | pos = skb_put(skb, 4); |
815 | *pos++ = WLAN_EID_PWR_CAPABILITY; |
816 | *pos++ = 2; |
817 | *pos++ = 0; /* min tx power */ |
818 | *pos++ = chan->max_power; /* max tx power */ |
819 | |
820 | /* 2. supported channels */ |
821 | /* TODO: get this in reg domain format */ |
822 | pos = skb_put(skb, 2 * sband->n_channels + 2); |
823 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
824 | *pos++ = 2 * sband->n_channels; |
825 | for (i = 0; i < sband->n_channels; i++) { |
826 | *pos++ = ieee80211_frequency_to_channel( |
827 | sband->channels[i].center_freq); |
828 | *pos++ = 1; /* one channel in the subband*/ |
829 | } |
830 | } |
831 | |
832 | /* if present, add any custom IEs that go before HT */ |
833 | if (assoc_data->ie_len && assoc_data->ie) { |
834 | static const u8 before_ht[] = { |
835 | WLAN_EID_SSID, |
836 | WLAN_EID_SUPP_RATES, |
837 | WLAN_EID_EXT_SUPP_RATES, |
838 | WLAN_EID_PWR_CAPABILITY, |
839 | WLAN_EID_SUPPORTED_CHANNELS, |
840 | WLAN_EID_RSN, |
841 | WLAN_EID_QOS_CAPA, |
842 | WLAN_EID_RRM_ENABLED_CAPABILITIES, |
843 | WLAN_EID_MOBILITY_DOMAIN, |
844 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
845 | }; |
846 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, |
847 | before_ht, ARRAY_SIZE(before_ht), |
848 | offset); |
849 | pos = skb_put(skb, noffset - offset); |
850 | memcpy(pos, assoc_data->ie + offset, noffset - offset); |
851 | offset = noffset; |
852 | } |
853 | |
854 | if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
855 | !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) |
856 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
857 | |
858 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
859 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
860 | sband, chan, sdata->smps_mode); |
861 | |
862 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
863 | ieee80211_add_vht_ie(sdata, skb, sband, |
864 | &assoc_data->ap_vht_cap); |
865 | |
866 | /* if present, add any custom non-vendor IEs that go after HT */ |
867 | if (assoc_data->ie_len && assoc_data->ie) { |
868 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, |
869 | assoc_data->ie_len, |
870 | offset); |
871 | pos = skb_put(skb, noffset - offset); |
872 | memcpy(pos, assoc_data->ie + offset, noffset - offset); |
873 | offset = noffset; |
874 | } |
875 | |
876 | if (assoc_data->wmm) { |
877 | if (assoc_data->uapsd) { |
878 | qos_info = ifmgd->uapsd_queues; |
879 | qos_info |= (ifmgd->uapsd_max_sp_len << |
880 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
881 | } else { |
882 | qos_info = 0; |
883 | } |
884 | |
885 | pos = skb_put(skb, 9); |
886 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
887 | *pos++ = 7; /* len */ |
888 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ |
889 | *pos++ = 0x50; |
890 | *pos++ = 0xf2; |
891 | *pos++ = 2; /* WME */ |
892 | *pos++ = 0; /* WME info */ |
893 | *pos++ = 1; /* WME ver */ |
894 | *pos++ = qos_info; |
895 | } |
896 | |
897 | /* add any remaining custom (i.e. vendor specific here) IEs */ |
898 | if (assoc_data->ie_len && assoc_data->ie) { |
899 | noffset = assoc_data->ie_len; |
900 | pos = skb_put(skb, noffset - offset); |
901 | memcpy(pos, assoc_data->ie + offset, noffset - offset); |
902 | } |
903 | |
904 | drv_mgd_prepare_tx(local, sdata); |
905 | |
906 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
907 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
908 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | |
909 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
910 | ieee80211_tx_skb(sdata, skb); |
911 | } |
912 | |
913 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
914 | struct ieee80211_sub_if_data *sdata) |
915 | { |
916 | struct ieee80211_pspoll *pspoll; |
917 | struct sk_buff *skb; |
918 | |
919 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
920 | if (!skb) |
921 | return; |
922 | |
923 | pspoll = (struct ieee80211_pspoll *) skb->data; |
924 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
925 | |
926 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
927 | ieee80211_tx_skb(sdata, skb); |
928 | } |
929 | |
930 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
931 | struct ieee80211_sub_if_data *sdata, |
932 | int powersave) |
933 | { |
934 | struct sk_buff *skb; |
935 | struct ieee80211_hdr_3addr *nullfunc; |
936 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
937 | |
938 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
939 | if (!skb) |
940 | return; |
941 | |
942 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
943 | if (powersave) |
944 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
945 | |
946 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
947 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; |
948 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
949 | IEEE80211_STA_CONNECTION_POLL)) |
950 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
951 | |
952 | ieee80211_tx_skb(sdata, skb); |
953 | } |
954 | |
955 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
956 | struct ieee80211_sub_if_data *sdata) |
957 | { |
958 | struct sk_buff *skb; |
959 | struct ieee80211_hdr *nullfunc; |
960 | __le16 fc; |
961 | |
962 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
963 | return; |
964 | |
965 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); |
966 | if (!skb) |
967 | return; |
968 | |
969 | skb_reserve(skb, local->hw.extra_tx_headroom); |
970 | |
971 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); |
972 | memset(nullfunc, 0, 30); |
973 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
974 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
975 | nullfunc->frame_control = fc; |
976 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
977 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); |
978 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
979 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); |
980 | |
981 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
982 | ieee80211_tx_skb(sdata, skb); |
983 | } |
984 | |
985 | /* spectrum management related things */ |
986 | static void ieee80211_chswitch_work(struct work_struct *work) |
987 | { |
988 | struct ieee80211_sub_if_data *sdata = |
989 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); |
990 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
991 | |
992 | if (!ieee80211_sdata_running(sdata)) |
993 | return; |
994 | |
995 | mutex_lock(&ifmgd->mtx); |
996 | if (!ifmgd->associated) |
997 | goto out; |
998 | |
999 | sdata->local->_oper_channel = sdata->local->csa_channel; |
1000 | if (!sdata->local->ops->channel_switch) { |
1001 | /* call "hw_config" only if doing sw channel switch */ |
1002 | ieee80211_hw_config(sdata->local, |
1003 | IEEE80211_CONF_CHANGE_CHANNEL); |
1004 | } else { |
1005 | /* update the device channel directly */ |
1006 | sdata->local->hw.conf.channel = sdata->local->_oper_channel; |
1007 | } |
1008 | |
1009 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
1010 | ifmgd->associated->channel = sdata->local->_oper_channel; |
1011 | |
1012 | /* XXX: wait for a beacon first? */ |
1013 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
1014 | IEEE80211_QUEUE_STOP_REASON_CSA); |
1015 | out: |
1016 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
1017 | mutex_unlock(&ifmgd->mtx); |
1018 | } |
1019 | |
1020 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
1021 | { |
1022 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
1023 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1024 | |
1025 | trace_api_chswitch_done(sdata, success); |
1026 | if (!success) { |
1027 | sdata_info(sdata, |
1028 | "driver channel switch failed, disconnecting\n"); |
1029 | ieee80211_queue_work(&sdata->local->hw, |
1030 | &ifmgd->csa_connection_drop_work); |
1031 | } else { |
1032 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
1033 | } |
1034 | } |
1035 | EXPORT_SYMBOL(ieee80211_chswitch_done); |
1036 | |
1037 | static void ieee80211_chswitch_timer(unsigned long data) |
1038 | { |
1039 | struct ieee80211_sub_if_data *sdata = |
1040 | (struct ieee80211_sub_if_data *) data; |
1041 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1042 | |
1043 | if (sdata->local->quiescing) { |
1044 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
1045 | return; |
1046 | } |
1047 | |
1048 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
1049 | } |
1050 | |
1051 | void |
1052 | ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
1053 | const struct ieee80211_channel_sw_ie *sw_elem, |
1054 | struct ieee80211_bss *bss, u64 timestamp) |
1055 | { |
1056 | struct cfg80211_bss *cbss = |
1057 | container_of((void *)bss, struct cfg80211_bss, priv); |
1058 | struct ieee80211_channel *new_ch; |
1059 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1060 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, |
1061 | cbss->channel->band); |
1062 | struct ieee80211_chanctx *chanctx; |
1063 | |
1064 | ASSERT_MGD_MTX(ifmgd); |
1065 | |
1066 | if (!ifmgd->associated) |
1067 | return; |
1068 | |
1069 | if (sdata->local->scanning) |
1070 | return; |
1071 | |
1072 | /* Disregard subsequent beacons if we are already running a timer |
1073 | processing a CSA */ |
1074 | |
1075 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) |
1076 | return; |
1077 | |
1078 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); |
1079 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) { |
1080 | sdata_info(sdata, |
1081 | "AP %pM switches to unsupported channel (%d MHz), disconnecting\n", |
1082 | ifmgd->associated->bssid, new_freq); |
1083 | ieee80211_queue_work(&sdata->local->hw, |
1084 | &ifmgd->csa_connection_drop_work); |
1085 | return; |
1086 | } |
1087 | |
1088 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
1089 | |
1090 | if (sdata->local->use_chanctx) { |
1091 | sdata_info(sdata, |
1092 | "not handling channel switch with channel contexts\n"); |
1093 | ieee80211_queue_work(&sdata->local->hw, |
1094 | &ifmgd->csa_connection_drop_work); |
1095 | return; |
1096 | } |
1097 | |
1098 | mutex_lock(&sdata->local->chanctx_mtx); |
1099 | if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) { |
1100 | mutex_unlock(&sdata->local->chanctx_mtx); |
1101 | return; |
1102 | } |
1103 | chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf), |
1104 | struct ieee80211_chanctx, conf); |
1105 | if (chanctx->refcount > 1) { |
1106 | sdata_info(sdata, |
1107 | "channel switch with multiple interfaces on the same channel, disconnecting\n"); |
1108 | ieee80211_queue_work(&sdata->local->hw, |
1109 | &ifmgd->csa_connection_drop_work); |
1110 | mutex_unlock(&sdata->local->chanctx_mtx); |
1111 | return; |
1112 | } |
1113 | mutex_unlock(&sdata->local->chanctx_mtx); |
1114 | |
1115 | sdata->local->csa_channel = new_ch; |
1116 | |
1117 | if (sw_elem->mode) |
1118 | ieee80211_stop_queues_by_reason(&sdata->local->hw, |
1119 | IEEE80211_QUEUE_STOP_REASON_CSA); |
1120 | |
1121 | if (sdata->local->ops->channel_switch) { |
1122 | /* use driver's channel switch callback */ |
1123 | struct ieee80211_channel_switch ch_switch = { |
1124 | .timestamp = timestamp, |
1125 | .block_tx = sw_elem->mode, |
1126 | .channel = new_ch, |
1127 | .count = sw_elem->count, |
1128 | }; |
1129 | |
1130 | drv_channel_switch(sdata->local, &ch_switch); |
1131 | return; |
1132 | } |
1133 | |
1134 | /* channel switch handled in software */ |
1135 | if (sw_elem->count <= 1) |
1136 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
1137 | else |
1138 | mod_timer(&ifmgd->chswitch_timer, |
1139 | TU_TO_EXP_TIME(sw_elem->count * |
1140 | cbss->beacon_interval)); |
1141 | } |
1142 | |
1143 | static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
1144 | struct ieee80211_channel *channel, |
1145 | const u8 *country_ie, u8 country_ie_len, |
1146 | const u8 *pwr_constr_elem) |
1147 | { |
1148 | struct ieee80211_country_ie_triplet *triplet; |
1149 | int chan = ieee80211_frequency_to_channel(channel->center_freq); |
1150 | int i, chan_pwr, chan_increment, new_ap_level; |
1151 | bool have_chan_pwr = false; |
1152 | |
1153 | /* Invalid IE */ |
1154 | if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
1155 | return 0; |
1156 | |
1157 | triplet = (void *)(country_ie + 3); |
1158 | country_ie_len -= 3; |
1159 | |
1160 | switch (channel->band) { |
1161 | default: |
1162 | WARN_ON_ONCE(1); |
1163 | /* fall through */ |
1164 | case IEEE80211_BAND_2GHZ: |
1165 | case IEEE80211_BAND_60GHZ: |
1166 | chan_increment = 1; |
1167 | break; |
1168 | case IEEE80211_BAND_5GHZ: |
1169 | chan_increment = 4; |
1170 | break; |
1171 | } |
1172 | |
1173 | /* find channel */ |
1174 | while (country_ie_len >= 3) { |
1175 | u8 first_channel = triplet->chans.first_channel; |
1176 | |
1177 | if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) |
1178 | goto next; |
1179 | |
1180 | for (i = 0; i < triplet->chans.num_channels; i++) { |
1181 | if (first_channel + i * chan_increment == chan) { |
1182 | have_chan_pwr = true; |
1183 | chan_pwr = triplet->chans.max_power; |
1184 | break; |
1185 | } |
1186 | } |
1187 | if (have_chan_pwr) |
1188 | break; |
1189 | |
1190 | next: |
1191 | triplet++; |
1192 | country_ie_len -= 3; |
1193 | } |
1194 | |
1195 | if (!have_chan_pwr) |
1196 | return 0; |
1197 | |
1198 | new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem); |
1199 | |
1200 | if (sdata->ap_power_level == new_ap_level) |
1201 | return 0; |
1202 | |
1203 | sdata_info(sdata, |
1204 | "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", |
1205 | new_ap_level, chan_pwr, *pwr_constr_elem, |
1206 | sdata->u.mgd.bssid); |
1207 | sdata->ap_power_level = new_ap_level; |
1208 | if (__ieee80211_recalc_txpower(sdata)) |
1209 | return BSS_CHANGED_TXPOWER; |
1210 | return 0; |
1211 | } |
1212 | |
1213 | /* powersave */ |
1214 | static void ieee80211_enable_ps(struct ieee80211_local *local, |
1215 | struct ieee80211_sub_if_data *sdata) |
1216 | { |
1217 | struct ieee80211_conf *conf = &local->hw.conf; |
1218 | |
1219 | /* |
1220 | * If we are scanning right now then the parameters will |
1221 | * take effect when scan finishes. |
1222 | */ |
1223 | if (local->scanning) |
1224 | return; |
1225 | |
1226 | if (conf->dynamic_ps_timeout > 0 && |
1227 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { |
1228 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1229 | msecs_to_jiffies(conf->dynamic_ps_timeout)); |
1230 | } else { |
1231 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1232 | ieee80211_send_nullfunc(local, sdata, 1); |
1233 | |
1234 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
1235 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
1236 | return; |
1237 | |
1238 | conf->flags |= IEEE80211_CONF_PS; |
1239 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
1240 | } |
1241 | } |
1242 | |
1243 | static void ieee80211_change_ps(struct ieee80211_local *local) |
1244 | { |
1245 | struct ieee80211_conf *conf = &local->hw.conf; |
1246 | |
1247 | if (local->ps_sdata) { |
1248 | ieee80211_enable_ps(local, local->ps_sdata); |
1249 | } else if (conf->flags & IEEE80211_CONF_PS) { |
1250 | conf->flags &= ~IEEE80211_CONF_PS; |
1251 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
1252 | del_timer_sync(&local->dynamic_ps_timer); |
1253 | cancel_work_sync(&local->dynamic_ps_enable_work); |
1254 | } |
1255 | } |
1256 | |
1257 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
1258 | { |
1259 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; |
1260 | struct sta_info *sta = NULL; |
1261 | bool authorized = false; |
1262 | |
1263 | if (!mgd->powersave) |
1264 | return false; |
1265 | |
1266 | if (mgd->broken_ap) |
1267 | return false; |
1268 | |
1269 | if (!mgd->associated) |
1270 | return false; |
1271 | |
1272 | if (mgd->flags & (IEEE80211_STA_BEACON_POLL | |
1273 | IEEE80211_STA_CONNECTION_POLL)) |
1274 | return false; |
1275 | |
1276 | rcu_read_lock(); |
1277 | sta = sta_info_get(sdata, mgd->bssid); |
1278 | if (sta) |
1279 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1280 | rcu_read_unlock(); |
1281 | |
1282 | return authorized; |
1283 | } |
1284 | |
1285 | /* need to hold RTNL or interface lock */ |
1286 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
1287 | { |
1288 | struct ieee80211_sub_if_data *sdata, *found = NULL; |
1289 | int count = 0; |
1290 | int timeout; |
1291 | |
1292 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { |
1293 | local->ps_sdata = NULL; |
1294 | return; |
1295 | } |
1296 | |
1297 | list_for_each_entry(sdata, &local->interfaces, list) { |
1298 | if (!ieee80211_sdata_running(sdata)) |
1299 | continue; |
1300 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
1301 | /* If an AP vif is found, then disable PS |
1302 | * by setting the count to zero thereby setting |
1303 | * ps_sdata to NULL. |
1304 | */ |
1305 | count = 0; |
1306 | break; |
1307 | } |
1308 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
1309 | continue; |
1310 | found = sdata; |
1311 | count++; |
1312 | } |
1313 | |
1314 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
1315 | s32 beaconint_us; |
1316 | |
1317 | if (latency < 0) |
1318 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
1319 | |
1320 | beaconint_us = ieee80211_tu_to_usec( |
1321 | found->vif.bss_conf.beacon_int); |
1322 | |
1323 | timeout = local->dynamic_ps_forced_timeout; |
1324 | if (timeout < 0) { |
1325 | /* |
1326 | * Go to full PSM if the user configures a very low |
1327 | * latency requirement. |
1328 | * The 2000 second value is there for compatibility |
1329 | * until the PM_QOS_NETWORK_LATENCY is configured |
1330 | * with real values. |
1331 | */ |
1332 | if (latency > (1900 * USEC_PER_MSEC) && |
1333 | latency != (2000 * USEC_PER_SEC)) |
1334 | timeout = 0; |
1335 | else |
1336 | timeout = 100; |
1337 | } |
1338 | local->hw.conf.dynamic_ps_timeout = timeout; |
1339 | |
1340 | if (beaconint_us > latency) { |
1341 | local->ps_sdata = NULL; |
1342 | } else { |
1343 | int maxslp = 1; |
1344 | u8 dtimper = found->u.mgd.dtim_period; |
1345 | |
1346 | /* If the TIM IE is invalid, pretend the value is 1 */ |
1347 | if (!dtimper) |
1348 | dtimper = 1; |
1349 | else if (dtimper > 1) |
1350 | maxslp = min_t(int, dtimper, |
1351 | latency / beaconint_us); |
1352 | |
1353 | local->hw.conf.max_sleep_period = maxslp; |
1354 | local->hw.conf.ps_dtim_period = dtimper; |
1355 | local->ps_sdata = found; |
1356 | } |
1357 | } else { |
1358 | local->ps_sdata = NULL; |
1359 | } |
1360 | |
1361 | ieee80211_change_ps(local); |
1362 | } |
1363 | |
1364 | void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) |
1365 | { |
1366 | bool ps_allowed = ieee80211_powersave_allowed(sdata); |
1367 | |
1368 | if (sdata->vif.bss_conf.ps != ps_allowed) { |
1369 | sdata->vif.bss_conf.ps = ps_allowed; |
1370 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); |
1371 | } |
1372 | } |
1373 | |
1374 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
1375 | { |
1376 | struct ieee80211_local *local = |
1377 | container_of(work, struct ieee80211_local, |
1378 | dynamic_ps_disable_work); |
1379 | |
1380 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1381 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
1382 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
1383 | } |
1384 | |
1385 | ieee80211_wake_queues_by_reason(&local->hw, |
1386 | IEEE80211_QUEUE_STOP_REASON_PS); |
1387 | } |
1388 | |
1389 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
1390 | { |
1391 | struct ieee80211_local *local = |
1392 | container_of(work, struct ieee80211_local, |
1393 | dynamic_ps_enable_work); |
1394 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
1395 | struct ieee80211_if_managed *ifmgd; |
1396 | unsigned long flags; |
1397 | int q; |
1398 | |
1399 | /* can only happen when PS was just disabled anyway */ |
1400 | if (!sdata) |
1401 | return; |
1402 | |
1403 | ifmgd = &sdata->u.mgd; |
1404 | |
1405 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
1406 | return; |
1407 | |
1408 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1409 | /* don't enter PS if TX frames are pending */ |
1410 | if (drv_tx_frames_pending(local)) { |
1411 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1412 | msecs_to_jiffies( |
1413 | local->hw.conf.dynamic_ps_timeout)); |
1414 | return; |
1415 | } |
1416 | |
1417 | /* |
1418 | * transmission can be stopped by others which leads to |
1419 | * dynamic_ps_timer expiry. Postpone the ps timer if it |
1420 | * is not the actual idle state. |
1421 | */ |
1422 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
1423 | for (q = 0; q < local->hw.queues; q++) { |
1424 | if (local->queue_stop_reasons[q]) { |
1425 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1426 | flags); |
1427 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1428 | msecs_to_jiffies( |
1429 | local->hw.conf.dynamic_ps_timeout)); |
1430 | return; |
1431 | } |
1432 | } |
1433 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
1434 | } |
1435 | |
1436 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
1437 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1438 | netif_tx_stop_all_queues(sdata->dev); |
1439 | |
1440 | if (drv_tx_frames_pending(local)) |
1441 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1442 | msecs_to_jiffies( |
1443 | local->hw.conf.dynamic_ps_timeout)); |
1444 | else { |
1445 | ieee80211_send_nullfunc(local, sdata, 1); |
1446 | /* Flush to get the tx status of nullfunc frame */ |
1447 | drv_flush(local, false); |
1448 | } |
1449 | } |
1450 | |
1451 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
1452 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || |
1453 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1454 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
1455 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
1456 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
1457 | } |
1458 | |
1459 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1460 | netif_tx_wake_all_queues(sdata->dev); |
1461 | } |
1462 | |
1463 | void ieee80211_dynamic_ps_timer(unsigned long data) |
1464 | { |
1465 | struct ieee80211_local *local = (void *) data; |
1466 | |
1467 | if (local->quiescing || local->suspended) |
1468 | return; |
1469 | |
1470 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
1471 | } |
1472 | |
1473 | void ieee80211_dfs_cac_timer_work(struct work_struct *work) |
1474 | { |
1475 | struct delayed_work *delayed_work = |
1476 | container_of(work, struct delayed_work, work); |
1477 | struct ieee80211_sub_if_data *sdata = |
1478 | container_of(delayed_work, struct ieee80211_sub_if_data, |
1479 | dfs_cac_timer_work); |
1480 | |
1481 | ieee80211_vif_release_channel(sdata); |
1482 | |
1483 | cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL); |
1484 | } |
1485 | |
1486 | /* MLME */ |
1487 | static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, |
1488 | struct ieee80211_sub_if_data *sdata, |
1489 | const u8 *wmm_param, size_t wmm_param_len) |
1490 | { |
1491 | struct ieee80211_tx_queue_params params; |
1492 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1493 | size_t left; |
1494 | int count; |
1495 | const u8 *pos; |
1496 | u8 uapsd_queues = 0; |
1497 | |
1498 | if (!local->ops->conf_tx) |
1499 | return false; |
1500 | |
1501 | if (local->hw.queues < IEEE80211_NUM_ACS) |
1502 | return false; |
1503 | |
1504 | if (!wmm_param) |
1505 | return false; |
1506 | |
1507 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
1508 | return false; |
1509 | |
1510 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) |
1511 | uapsd_queues = ifmgd->uapsd_queues; |
1512 | |
1513 | count = wmm_param[6] & 0x0f; |
1514 | if (count == ifmgd->wmm_last_param_set) |
1515 | return false; |
1516 | ifmgd->wmm_last_param_set = count; |
1517 | |
1518 | pos = wmm_param + 8; |
1519 | left = wmm_param_len - 8; |
1520 | |
1521 | memset(¶ms, 0, sizeof(params)); |
1522 | |
1523 | sdata->wmm_acm = 0; |
1524 | for (; left >= 4; left -= 4, pos += 4) { |
1525 | int aci = (pos[0] >> 5) & 0x03; |
1526 | int acm = (pos[0] >> 4) & 0x01; |
1527 | bool uapsd = false; |
1528 | int queue; |
1529 | |
1530 | switch (aci) { |
1531 | case 1: /* AC_BK */ |
1532 | queue = 3; |
1533 | if (acm) |
1534 | sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
1535 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
1536 | uapsd = true; |
1537 | break; |
1538 | case 2: /* AC_VI */ |
1539 | queue = 1; |
1540 | if (acm) |
1541 | sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
1542 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
1543 | uapsd = true; |
1544 | break; |
1545 | case 3: /* AC_VO */ |
1546 | queue = 0; |
1547 | if (acm) |
1548 | sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
1549 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
1550 | uapsd = true; |
1551 | break; |
1552 | case 0: /* AC_BE */ |
1553 | default: |
1554 | queue = 2; |
1555 | if (acm) |
1556 | sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
1557 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
1558 | uapsd = true; |
1559 | break; |
1560 | } |
1561 | |
1562 | params.aifs = pos[0] & 0x0f; |
1563 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
1564 | params.cw_min = ecw2cw(pos[1] & 0x0f); |
1565 | params.txop = get_unaligned_le16(pos + 2); |
1566 | params.uapsd = uapsd; |
1567 | |
1568 | mlme_dbg(sdata, |
1569 | "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
1570 | queue, aci, acm, |
1571 | params.aifs, params.cw_min, params.cw_max, |
1572 | params.txop, params.uapsd); |
1573 | sdata->tx_conf[queue] = params; |
1574 | if (drv_conf_tx(local, sdata, queue, ¶ms)) |
1575 | sdata_err(sdata, |
1576 | "failed to set TX queue parameters for queue %d\n", |
1577 | queue); |
1578 | } |
1579 | |
1580 | /* enable WMM or activate new settings */ |
1581 | sdata->vif.bss_conf.qos = true; |
1582 | return true; |
1583 | } |
1584 | |
1585 | static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
1586 | { |
1587 | lockdep_assert_held(&sdata->local->mtx); |
1588 | |
1589 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
1590 | IEEE80211_STA_BEACON_POLL); |
1591 | ieee80211_run_deferred_scan(sdata->local); |
1592 | } |
1593 | |
1594 | static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
1595 | { |
1596 | mutex_lock(&sdata->local->mtx); |
1597 | __ieee80211_stop_poll(sdata); |
1598 | mutex_unlock(&sdata->local->mtx); |
1599 | } |
1600 | |
1601 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
1602 | u16 capab, bool erp_valid, u8 erp) |
1603 | { |
1604 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
1605 | u32 changed = 0; |
1606 | bool use_protection; |
1607 | bool use_short_preamble; |
1608 | bool use_short_slot; |
1609 | |
1610 | if (erp_valid) { |
1611 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
1612 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
1613 | } else { |
1614 | use_protection = false; |
1615 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
1616 | } |
1617 | |
1618 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
1619 | if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) |
1620 | use_short_slot = true; |
1621 | |
1622 | if (use_protection != bss_conf->use_cts_prot) { |
1623 | bss_conf->use_cts_prot = use_protection; |
1624 | changed |= BSS_CHANGED_ERP_CTS_PROT; |
1625 | } |
1626 | |
1627 | if (use_short_preamble != bss_conf->use_short_preamble) { |
1628 | bss_conf->use_short_preamble = use_short_preamble; |
1629 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
1630 | } |
1631 | |
1632 | if (use_short_slot != bss_conf->use_short_slot) { |
1633 | bss_conf->use_short_slot = use_short_slot; |
1634 | changed |= BSS_CHANGED_ERP_SLOT; |
1635 | } |
1636 | |
1637 | return changed; |
1638 | } |
1639 | |
1640 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
1641 | struct cfg80211_bss *cbss, |
1642 | u32 bss_info_changed) |
1643 | { |
1644 | struct ieee80211_bss *bss = (void *)cbss->priv; |
1645 | struct ieee80211_local *local = sdata->local; |
1646 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
1647 | |
1648 | bss_info_changed |= BSS_CHANGED_ASSOC; |
1649 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
1650 | bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); |
1651 | |
1652 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
1653 | IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); |
1654 | |
1655 | sdata->u.mgd.associated = cbss; |
1656 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
1657 | |
1658 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
1659 | |
1660 | if (sdata->vif.p2p) { |
1661 | const struct cfg80211_bss_ies *ies; |
1662 | |
1663 | rcu_read_lock(); |
1664 | ies = rcu_dereference(cbss->ies); |
1665 | if (ies) { |
1666 | u8 noa[2]; |
1667 | int ret; |
1668 | |
1669 | ret = cfg80211_get_p2p_attr( |
1670 | ies->data, ies->len, |
1671 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
1672 | noa, sizeof(noa)); |
1673 | if (ret >= 2) { |
1674 | bss_conf->p2p_oppps = noa[1] & 0x80; |
1675 | bss_conf->p2p_ctwindow = noa[1] & 0x7f; |
1676 | bss_info_changed |= BSS_CHANGED_P2P_PS; |
1677 | sdata->u.mgd.p2p_noa_index = noa[0]; |
1678 | } |
1679 | } |
1680 | rcu_read_unlock(); |
1681 | } |
1682 | |
1683 | /* just to be sure */ |
1684 | ieee80211_stop_poll(sdata); |
1685 | |
1686 | ieee80211_led_assoc(local, 1); |
1687 | |
1688 | if (sdata->u.mgd.assoc_data->have_beacon) { |
1689 | /* |
1690 | * If the AP is buggy we may get here with no DTIM period |
1691 | * known, so assume it's 1 which is the only safe assumption |
1692 | * in that case, although if the TIM IE is broken powersave |
1693 | * probably just won't work at all. |
1694 | */ |
1695 | bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; |
1696 | bss_info_changed |= BSS_CHANGED_DTIM_PERIOD; |
1697 | } else { |
1698 | bss_conf->dtim_period = 0; |
1699 | } |
1700 | |
1701 | bss_conf->assoc = 1; |
1702 | |
1703 | /* Tell the driver to monitor connection quality (if supported) */ |
1704 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
1705 | bss_conf->cqm_rssi_thold) |
1706 | bss_info_changed |= BSS_CHANGED_CQM; |
1707 | |
1708 | /* Enable ARP filtering */ |
1709 | if (bss_conf->arp_addr_cnt) |
1710 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; |
1711 | |
1712 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
1713 | |
1714 | mutex_lock(&local->iflist_mtx); |
1715 | ieee80211_recalc_ps(local, -1); |
1716 | mutex_unlock(&local->iflist_mtx); |
1717 | |
1718 | ieee80211_recalc_smps(sdata); |
1719 | ieee80211_recalc_ps_vif(sdata); |
1720 | |
1721 | netif_tx_start_all_queues(sdata->dev); |
1722 | netif_carrier_on(sdata->dev); |
1723 | } |
1724 | |
1725 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
1726 | u16 stype, u16 reason, bool tx, |
1727 | u8 *frame_buf) |
1728 | { |
1729 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1730 | struct ieee80211_local *local = sdata->local; |
1731 | u32 changed = 0; |
1732 | |
1733 | ASSERT_MGD_MTX(ifmgd); |
1734 | |
1735 | if (WARN_ON_ONCE(tx && !frame_buf)) |
1736 | return; |
1737 | |
1738 | if (WARN_ON(!ifmgd->associated)) |
1739 | return; |
1740 | |
1741 | ieee80211_stop_poll(sdata); |
1742 | |
1743 | ifmgd->associated = NULL; |
1744 | |
1745 | /* |
1746 | * we need to commit the associated = NULL change because the |
1747 | * scan code uses that to determine whether this iface should |
1748 | * go to/wake up from powersave or not -- and could otherwise |
1749 | * wake the queues erroneously. |
1750 | */ |
1751 | smp_mb(); |
1752 | |
1753 | /* |
1754 | * Thus, we can only afterwards stop the queues -- to account |
1755 | * for the case where another CPU is finishing a scan at this |
1756 | * time -- we don't want the scan code to enable queues. |
1757 | */ |
1758 | |
1759 | netif_tx_stop_all_queues(sdata->dev); |
1760 | netif_carrier_off(sdata->dev); |
1761 | |
1762 | /* |
1763 | * if we want to get out of ps before disassoc (why?) we have |
1764 | * to do it before sending disassoc, as otherwise the null-packet |
1765 | * won't be valid. |
1766 | */ |
1767 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1768 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
1769 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
1770 | } |
1771 | local->ps_sdata = NULL; |
1772 | |
1773 | /* disable per-vif ps */ |
1774 | ieee80211_recalc_ps_vif(sdata); |
1775 | |
1776 | /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ |
1777 | if (tx) |
1778 | drv_flush(local, false); |
1779 | |
1780 | /* deauthenticate/disassociate now */ |
1781 | if (tx || frame_buf) |
1782 | ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, |
1783 | reason, tx, frame_buf); |
1784 | |
1785 | /* flush out frame */ |
1786 | if (tx) |
1787 | drv_flush(local, false); |
1788 | |
1789 | /* clear bssid only after building the needed mgmt frames */ |
1790 | memset(ifmgd->bssid, 0, ETH_ALEN); |
1791 | |
1792 | /* remove AP and TDLS peers */ |
1793 | sta_info_flush_defer(sdata); |
1794 | |
1795 | /* finally reset all BSS / config parameters */ |
1796 | changed |= ieee80211_reset_erp_info(sdata); |
1797 | |
1798 | ieee80211_led_assoc(local, 0); |
1799 | changed |= BSS_CHANGED_ASSOC; |
1800 | sdata->vif.bss_conf.assoc = false; |
1801 | |
1802 | sdata->vif.bss_conf.p2p_ctwindow = 0; |
1803 | sdata->vif.bss_conf.p2p_oppps = false; |
1804 | |
1805 | /* on the next assoc, re-program HT parameters */ |
1806 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
1807 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); |
1808 | |
1809 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; |
1810 | |
1811 | del_timer_sync(&local->dynamic_ps_timer); |
1812 | cancel_work_sync(&local->dynamic_ps_enable_work); |
1813 | |
1814 | /* Disable ARP filtering */ |
1815 | if (sdata->vif.bss_conf.arp_addr_cnt) |
1816 | changed |= BSS_CHANGED_ARP_FILTER; |
1817 | |
1818 | sdata->vif.bss_conf.qos = false; |
1819 | changed |= BSS_CHANGED_QOS; |
1820 | |
1821 | /* The BSSID (not really interesting) and HT changed */ |
1822 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; |
1823 | ieee80211_bss_info_change_notify(sdata, changed); |
1824 | |
1825 | /* disassociated - set to defaults now */ |
1826 | ieee80211_set_wmm_default(sdata, false); |
1827 | |
1828 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
1829 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); |
1830 | del_timer_sync(&sdata->u.mgd.timer); |
1831 | del_timer_sync(&sdata->u.mgd.chswitch_timer); |
1832 | |
1833 | sdata->u.mgd.timers_running = 0; |
1834 | |
1835 | sdata->vif.bss_conf.dtim_period = 0; |
1836 | |
1837 | ifmgd->flags = 0; |
1838 | ieee80211_vif_release_channel(sdata); |
1839 | } |
1840 | |
1841 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1842 | struct ieee80211_hdr *hdr) |
1843 | { |
1844 | /* |
1845 | * We can postpone the mgd.timer whenever receiving unicast frames |
1846 | * from AP because we know that the connection is working both ways |
1847 | * at that time. But multicast frames (and hence also beacons) must |
1848 | * be ignored here, because we need to trigger the timer during |
1849 | * data idle periods for sending the periodic probe request to the |
1850 | * AP we're connected to. |
1851 | */ |
1852 | if (is_multicast_ether_addr(hdr->addr1)) |
1853 | return; |
1854 | |
1855 | ieee80211_sta_reset_conn_monitor(sdata); |
1856 | } |
1857 | |
1858 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
1859 | { |
1860 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1861 | struct ieee80211_local *local = sdata->local; |
1862 | |
1863 | mutex_lock(&local->mtx); |
1864 | if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1865 | IEEE80211_STA_CONNECTION_POLL))) { |
1866 | mutex_unlock(&local->mtx); |
1867 | return; |
1868 | } |
1869 | |
1870 | __ieee80211_stop_poll(sdata); |
1871 | |
1872 | mutex_lock(&local->iflist_mtx); |
1873 | ieee80211_recalc_ps(local, -1); |
1874 | mutex_unlock(&local->iflist_mtx); |
1875 | |
1876 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1877 | goto out; |
1878 | |
1879 | /* |
1880 | * We've received a probe response, but are not sure whether |
1881 | * we have or will be receiving any beacons or data, so let's |
1882 | * schedule the timers again, just in case. |
1883 | */ |
1884 | ieee80211_sta_reset_beacon_monitor(sdata); |
1885 | |
1886 | mod_timer(&ifmgd->conn_mon_timer, |
1887 | round_jiffies_up(jiffies + |
1888 | IEEE80211_CONNECTION_IDLE_TIME)); |
1889 | out: |
1890 | mutex_unlock(&local->mtx); |
1891 | } |
1892 | |
1893 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, |
1894 | struct ieee80211_hdr *hdr, bool ack) |
1895 | { |
1896 | if (!ieee80211_is_data(hdr->frame_control)) |
1897 | return; |
1898 | |
1899 | if (ieee80211_is_nullfunc(hdr->frame_control) && |
1900 | sdata->u.mgd.probe_send_count > 0) { |
1901 | if (ack) |
1902 | ieee80211_sta_reset_conn_monitor(sdata); |
1903 | else |
1904 | sdata->u.mgd.nullfunc_failed = true; |
1905 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
1906 | return; |
1907 | } |
1908 | |
1909 | if (ack) |
1910 | ieee80211_sta_reset_conn_monitor(sdata); |
1911 | } |
1912 | |
1913 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1914 | { |
1915 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1916 | const u8 *ssid; |
1917 | u8 *dst = ifmgd->associated->bssid; |
1918 | u8 unicast_limit = max(1, max_probe_tries - 3); |
1919 | |
1920 | /* |
1921 | * Try sending broadcast probe requests for the last three |
1922 | * probe requests after the first ones failed since some |
1923 | * buggy APs only support broadcast probe requests. |
1924 | */ |
1925 | if (ifmgd->probe_send_count >= unicast_limit) |
1926 | dst = NULL; |
1927 | |
1928 | /* |
1929 | * When the hardware reports an accurate Tx ACK status, it's |
1930 | * better to send a nullfunc frame instead of a probe request, |
1931 | * as it will kick us off the AP quickly if we aren't associated |
1932 | * anymore. The timeout will be reset if the frame is ACKed by |
1933 | * the AP. |
1934 | */ |
1935 | ifmgd->probe_send_count++; |
1936 | |
1937 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
1938 | ifmgd->nullfunc_failed = false; |
1939 | ieee80211_send_nullfunc(sdata->local, sdata, 0); |
1940 | } else { |
1941 | int ssid_len; |
1942 | |
1943 | rcu_read_lock(); |
1944 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
1945 | if (WARN_ON_ONCE(ssid == NULL)) |
1946 | ssid_len = 0; |
1947 | else |
1948 | ssid_len = ssid[1]; |
1949 | |
1950 | ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, |
1951 | 0, (u32) -1, true, 0, |
1952 | ifmgd->associated->channel, false); |
1953 | rcu_read_unlock(); |
1954 | } |
1955 | |
1956 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
1957 | run_again(ifmgd, ifmgd->probe_timeout); |
1958 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
1959 | drv_flush(sdata->local, false); |
1960 | } |
1961 | |
1962 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1963 | bool beacon) |
1964 | { |
1965 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1966 | bool already = false; |
1967 | |
1968 | if (!ieee80211_sdata_running(sdata)) |
1969 | return; |
1970 | |
1971 | mutex_lock(&ifmgd->mtx); |
1972 | |
1973 | if (!ifmgd->associated) |
1974 | goto out; |
1975 | |
1976 | mutex_lock(&sdata->local->mtx); |
1977 | |
1978 | if (sdata->local->tmp_channel || sdata->local->scanning) { |
1979 | mutex_unlock(&sdata->local->mtx); |
1980 | goto out; |
1981 | } |
1982 | |
1983 | if (beacon) |
1984 | mlme_dbg_ratelimited(sdata, |
1985 | "detected beacon loss from AP - probing\n"); |
1986 | |
1987 | ieee80211_cqm_rssi_notify(&sdata->vif, |
1988 | NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL); |
1989 | |
1990 | /* |
1991 | * The driver/our work has already reported this event or the |
1992 | * connection monitoring has kicked in and we have already sent |
1993 | * a probe request. Or maybe the AP died and the driver keeps |
1994 | * reporting until we disassociate... |
1995 | * |
1996 | * In either case we have to ignore the current call to this |
1997 | * function (except for setting the correct probe reason bit) |
1998 | * because otherwise we would reset the timer every time and |
1999 | * never check whether we received a probe response! |
2000 | */ |
2001 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
2002 | IEEE80211_STA_CONNECTION_POLL)) |
2003 | already = true; |
2004 | |
2005 | if (beacon) |
2006 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; |
2007 | else |
2008 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
2009 | |
2010 | mutex_unlock(&sdata->local->mtx); |
2011 | |
2012 | if (already) |
2013 | goto out; |
2014 | |
2015 | mutex_lock(&sdata->local->iflist_mtx); |
2016 | ieee80211_recalc_ps(sdata->local, -1); |
2017 | mutex_unlock(&sdata->local->iflist_mtx); |
2018 | |
2019 | ifmgd->probe_send_count = 0; |
2020 | ieee80211_mgd_probe_ap_send(sdata); |
2021 | out: |
2022 | mutex_unlock(&ifmgd->mtx); |
2023 | } |
2024 | |
2025 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
2026 | struct ieee80211_vif *vif) |
2027 | { |
2028 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
2029 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2030 | struct cfg80211_bss *cbss; |
2031 | struct sk_buff *skb; |
2032 | const u8 *ssid; |
2033 | int ssid_len; |
2034 | |
2035 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
2036 | return NULL; |
2037 | |
2038 | ASSERT_MGD_MTX(ifmgd); |
2039 | |
2040 | if (ifmgd->associated) |
2041 | cbss = ifmgd->associated; |
2042 | else if (ifmgd->auth_data) |
2043 | cbss = ifmgd->auth_data->bss; |
2044 | else if (ifmgd->assoc_data) |
2045 | cbss = ifmgd->assoc_data->bss; |
2046 | else |
2047 | return NULL; |
2048 | |
2049 | rcu_read_lock(); |
2050 | ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); |
2051 | if (WARN_ON_ONCE(ssid == NULL)) |
2052 | ssid_len = 0; |
2053 | else |
2054 | ssid_len = ssid[1]; |
2055 | |
2056 | skb = ieee80211_build_probe_req(sdata, cbss->bssid, |
2057 | (u32) -1, cbss->channel, |
2058 | ssid + 2, ssid_len, |
2059 | NULL, 0, true); |
2060 | rcu_read_unlock(); |
2061 | |
2062 | return skb; |
2063 | } |
2064 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); |
2065 | |
2066 | static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) |
2067 | { |
2068 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2069 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
2070 | |
2071 | mutex_lock(&ifmgd->mtx); |
2072 | if (!ifmgd->associated) { |
2073 | mutex_unlock(&ifmgd->mtx); |
2074 | return; |
2075 | } |
2076 | |
2077 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
2078 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
2079 | true, frame_buf); |
2080 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
2081 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
2082 | IEEE80211_QUEUE_STOP_REASON_CSA); |
2083 | mutex_unlock(&ifmgd->mtx); |
2084 | |
2085 | /* |
2086 | * must be outside lock due to cfg80211, |
2087 | * but that's not a problem. |
2088 | */ |
2089 | cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); |
2090 | } |
2091 | |
2092 | static void ieee80211_beacon_connection_loss_work(struct work_struct *work) |
2093 | { |
2094 | struct ieee80211_sub_if_data *sdata = |
2095 | container_of(work, struct ieee80211_sub_if_data, |
2096 | u.mgd.beacon_connection_loss_work); |
2097 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2098 | struct sta_info *sta; |
2099 | |
2100 | if (ifmgd->associated) { |
2101 | rcu_read_lock(); |
2102 | sta = sta_info_get(sdata, ifmgd->bssid); |
2103 | if (sta) |
2104 | sta->beacon_loss_count++; |
2105 | rcu_read_unlock(); |
2106 | } |
2107 | |
2108 | if (ifmgd->connection_loss) { |
2109 | sdata_info(sdata, "Connection to AP %pM lost\n", |
2110 | ifmgd->bssid); |
2111 | __ieee80211_disconnect(sdata); |
2112 | } else { |
2113 | ieee80211_mgd_probe_ap(sdata, true); |
2114 | } |
2115 | } |
2116 | |
2117 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
2118 | { |
2119 | struct ieee80211_sub_if_data *sdata = |
2120 | container_of(work, struct ieee80211_sub_if_data, |
2121 | u.mgd.csa_connection_drop_work); |
2122 | |
2123 | __ieee80211_disconnect(sdata); |
2124 | } |
2125 | |
2126 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
2127 | { |
2128 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
2129 | struct ieee80211_hw *hw = &sdata->local->hw; |
2130 | |
2131 | trace_api_beacon_loss(sdata); |
2132 | |
2133 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
2134 | sdata->u.mgd.connection_loss = false; |
2135 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
2136 | } |
2137 | EXPORT_SYMBOL(ieee80211_beacon_loss); |
2138 | |
2139 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
2140 | { |
2141 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
2142 | struct ieee80211_hw *hw = &sdata->local->hw; |
2143 | |
2144 | trace_api_connection_loss(sdata); |
2145 | |
2146 | sdata->u.mgd.connection_loss = true; |
2147 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
2148 | } |
2149 | EXPORT_SYMBOL(ieee80211_connection_loss); |
2150 | |
2151 | |
2152 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
2153 | bool assoc) |
2154 | { |
2155 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
2156 | |
2157 | lockdep_assert_held(&sdata->u.mgd.mtx); |
2158 | |
2159 | if (!assoc) { |
2160 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); |
2161 | |
2162 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); |
2163 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
2164 | sdata->u.mgd.flags = 0; |
2165 | ieee80211_vif_release_channel(sdata); |
2166 | } |
2167 | |
2168 | cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); |
2169 | kfree(auth_data); |
2170 | sdata->u.mgd.auth_data = NULL; |
2171 | } |
2172 | |
2173 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
2174 | struct ieee80211_mgmt *mgmt, size_t len) |
2175 | { |
2176 | struct ieee80211_local *local = sdata->local; |
2177 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; |
2178 | u8 *pos; |
2179 | struct ieee802_11_elems elems; |
2180 | u32 tx_flags = 0; |
2181 | |
2182 | pos = mgmt->u.auth.variable; |
2183 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
2184 | if (!elems.challenge) |
2185 | return; |
2186 | auth_data->expected_transaction = 4; |
2187 | drv_mgd_prepare_tx(sdata->local, sdata); |
2188 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
2189 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
2190 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
2191 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, |
2192 | elems.challenge - 2, elems.challenge_len + 2, |
2193 | auth_data->bss->bssid, auth_data->bss->bssid, |
2194 | auth_data->key, auth_data->key_len, |
2195 | auth_data->key_idx, tx_flags); |
2196 | } |
2197 | |
2198 | static enum rx_mgmt_action __must_check |
2199 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
2200 | struct ieee80211_mgmt *mgmt, size_t len) |
2201 | { |
2202 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2203 | u8 bssid[ETH_ALEN]; |
2204 | u16 auth_alg, auth_transaction, status_code; |
2205 | struct sta_info *sta; |
2206 | |
2207 | lockdep_assert_held(&ifmgd->mtx); |
2208 | |
2209 | if (len < 24 + 6) |
2210 | return RX_MGMT_NONE; |
2211 | |
2212 | if (!ifmgd->auth_data || ifmgd->auth_data->done) |
2213 | return RX_MGMT_NONE; |
2214 | |
2215 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); |
2216 | |
2217 | if (!ether_addr_equal(bssid, mgmt->bssid)) |
2218 | return RX_MGMT_NONE; |
2219 | |
2220 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
2221 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
2222 | status_code = le16_to_cpu(mgmt->u.auth.status_code); |
2223 | |
2224 | if (auth_alg != ifmgd->auth_data->algorithm || |
2225 | auth_transaction != ifmgd->auth_data->expected_transaction) { |
2226 | sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", |
2227 | mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, |
2228 | auth_transaction, |
2229 | ifmgd->auth_data->expected_transaction); |
2230 | return RX_MGMT_NONE; |
2231 | } |
2232 | |
2233 | if (status_code != WLAN_STATUS_SUCCESS) { |
2234 | sdata_info(sdata, "%pM denied authentication (status %d)\n", |
2235 | mgmt->sa, status_code); |
2236 | ieee80211_destroy_auth_data(sdata, false); |
2237 | return RX_MGMT_CFG80211_RX_AUTH; |
2238 | } |
2239 | |
2240 | switch (ifmgd->auth_data->algorithm) { |
2241 | case WLAN_AUTH_OPEN: |
2242 | case WLAN_AUTH_LEAP: |
2243 | case WLAN_AUTH_FT: |
2244 | case WLAN_AUTH_SAE: |
2245 | break; |
2246 | case WLAN_AUTH_SHARED_KEY: |
2247 | if (ifmgd->auth_data->expected_transaction != 4) { |
2248 | ieee80211_auth_challenge(sdata, mgmt, len); |
2249 | /* need another frame */ |
2250 | return RX_MGMT_NONE; |
2251 | } |
2252 | break; |
2253 | default: |
2254 | WARN_ONCE(1, "invalid auth alg %d", |
2255 | ifmgd->auth_data->algorithm); |
2256 | return RX_MGMT_NONE; |
2257 | } |
2258 | |
2259 | sdata_info(sdata, "authenticated\n"); |
2260 | ifmgd->auth_data->done = true; |
2261 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; |
2262 | ifmgd->auth_data->timeout_started = true; |
2263 | run_again(ifmgd, ifmgd->auth_data->timeout); |
2264 | |
2265 | if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && |
2266 | ifmgd->auth_data->expected_transaction != 2) { |
2267 | /* |
2268 | * Report auth frame to user space for processing since another |
2269 | * round of Authentication frames is still needed. |
2270 | */ |
2271 | return RX_MGMT_CFG80211_RX_AUTH; |
2272 | } |
2273 | |
2274 | /* move station state to auth */ |
2275 | mutex_lock(&sdata->local->sta_mtx); |
2276 | sta = sta_info_get(sdata, bssid); |
2277 | if (!sta) { |
2278 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); |
2279 | goto out_err; |
2280 | } |
2281 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { |
2282 | sdata_info(sdata, "failed moving %pM to auth\n", bssid); |
2283 | goto out_err; |
2284 | } |
2285 | mutex_unlock(&sdata->local->sta_mtx); |
2286 | |
2287 | return RX_MGMT_CFG80211_RX_AUTH; |
2288 | out_err: |
2289 | mutex_unlock(&sdata->local->sta_mtx); |
2290 | /* ignore frame -- wait for timeout */ |
2291 | return RX_MGMT_NONE; |
2292 | } |
2293 | |
2294 | |
2295 | static enum rx_mgmt_action __must_check |
2296 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
2297 | struct ieee80211_mgmt *mgmt, size_t len) |
2298 | { |
2299 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2300 | const u8 *bssid = NULL; |
2301 | u16 reason_code; |
2302 | |
2303 | lockdep_assert_held(&ifmgd->mtx); |
2304 | |
2305 | if (len < 24 + 2) |
2306 | return RX_MGMT_NONE; |
2307 | |
2308 | if (!ifmgd->associated || |
2309 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
2310 | return RX_MGMT_NONE; |
2311 | |
2312 | bssid = ifmgd->associated->bssid; |
2313 | |
2314 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
2315 | |
2316 | sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n", |
2317 | bssid, reason_code); |
2318 | |
2319 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
2320 | |
2321 | return RX_MGMT_CFG80211_DEAUTH; |
2322 | } |
2323 | |
2324 | |
2325 | static enum rx_mgmt_action __must_check |
2326 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
2327 | struct ieee80211_mgmt *mgmt, size_t len) |
2328 | { |
2329 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2330 | u16 reason_code; |
2331 | |
2332 | lockdep_assert_held(&ifmgd->mtx); |
2333 | |
2334 | if (len < 24 + 2) |
2335 | return RX_MGMT_NONE; |
2336 | |
2337 | if (!ifmgd->associated || |
2338 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
2339 | return RX_MGMT_NONE; |
2340 | |
2341 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
2342 | |
2343 | sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", |
2344 | mgmt->sa, reason_code); |
2345 | |
2346 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
2347 | |
2348 | return RX_MGMT_CFG80211_DISASSOC; |
2349 | } |
2350 | |
2351 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
2352 | u8 *supp_rates, unsigned int supp_rates_len, |
2353 | u32 *rates, u32 *basic_rates, |
2354 | bool *have_higher_than_11mbit, |
2355 | int *min_rate, int *min_rate_index) |
2356 | { |
2357 | int i, j; |
2358 | |
2359 | for (i = 0; i < supp_rates_len; i++) { |
2360 | int rate = (supp_rates[i] & 0x7f) * 5; |
2361 | bool is_basic = !!(supp_rates[i] & 0x80); |
2362 | |
2363 | if (rate > 110) |
2364 | *have_higher_than_11mbit = true; |
2365 | |
2366 | /* |
2367 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 |
2368 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. |
2369 | * |
2370 | * Note: Even through the membership selector and the basic |
2371 | * rate flag share the same bit, they are not exactly |
2372 | * the same. |
2373 | */ |
2374 | if (!!(supp_rates[i] & 0x80) && |
2375 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) |
2376 | continue; |
2377 | |
2378 | for (j = 0; j < sband->n_bitrates; j++) { |
2379 | if (sband->bitrates[j].bitrate == rate) { |
2380 | *rates |= BIT(j); |
2381 | if (is_basic) |
2382 | *basic_rates |= BIT(j); |
2383 | if (rate < *min_rate) { |
2384 | *min_rate = rate; |
2385 | *min_rate_index = j; |
2386 | } |
2387 | break; |
2388 | } |
2389 | } |
2390 | } |
2391 | } |
2392 | |
2393 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
2394 | bool assoc) |
2395 | { |
2396 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
2397 | |
2398 | lockdep_assert_held(&sdata->u.mgd.mtx); |
2399 | |
2400 | if (!assoc) { |
2401 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); |
2402 | |
2403 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); |
2404 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
2405 | sdata->u.mgd.flags = 0; |
2406 | ieee80211_vif_release_channel(sdata); |
2407 | } |
2408 | |
2409 | kfree(assoc_data); |
2410 | sdata->u.mgd.assoc_data = NULL; |
2411 | } |
2412 | |
2413 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, |
2414 | struct cfg80211_bss *cbss, |
2415 | struct ieee80211_mgmt *mgmt, size_t len) |
2416 | { |
2417 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2418 | struct ieee80211_local *local = sdata->local; |
2419 | struct ieee80211_supported_band *sband; |
2420 | struct sta_info *sta; |
2421 | u8 *pos; |
2422 | u16 capab_info, aid; |
2423 | struct ieee802_11_elems elems; |
2424 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
2425 | u32 changed = 0; |
2426 | int err; |
2427 | |
2428 | /* AssocResp and ReassocResp have identical structure */ |
2429 | |
2430 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
2431 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
2432 | |
2433 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
2434 | sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", |
2435 | aid); |
2436 | aid &= ~(BIT(15) | BIT(14)); |
2437 | |
2438 | ifmgd->broken_ap = false; |
2439 | |
2440 | if (aid == 0 || aid > IEEE80211_MAX_AID) { |
2441 | sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", |
2442 | aid); |
2443 | aid = 0; |
2444 | ifmgd->broken_ap = true; |
2445 | } |
2446 | |
2447 | pos = mgmt->u.assoc_resp.variable; |
2448 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
2449 | |
2450 | if (!elems.supp_rates) { |
2451 | sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
2452 | return false; |
2453 | } |
2454 | |
2455 | ifmgd->aid = aid; |
2456 | |
2457 | /* |
2458 | * We previously checked these in the beacon/probe response, so |
2459 | * they should be present here. This is just a safety net. |
2460 | */ |
2461 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
2462 | (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { |
2463 | sdata_info(sdata, |
2464 | "HT AP is missing WMM params or HT capability/operation in AssocResp\n"); |
2465 | return false; |
2466 | } |
2467 | |
2468 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
2469 | (!elems.vht_cap_elem || !elems.vht_operation)) { |
2470 | sdata_info(sdata, |
2471 | "VHT AP is missing VHT capability/operation in AssocResp\n"); |
2472 | return false; |
2473 | } |
2474 | |
2475 | mutex_lock(&sdata->local->sta_mtx); |
2476 | /* |
2477 | * station info was already allocated and inserted before |
2478 | * the association and should be available to us |
2479 | */ |
2480 | sta = sta_info_get(sdata, cbss->bssid); |
2481 | if (WARN_ON(!sta)) { |
2482 | mutex_unlock(&sdata->local->sta_mtx); |
2483 | return false; |
2484 | } |
2485 | |
2486 | sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
2487 | |
2488 | /* Set up internal HT/VHT capabilities */ |
2489 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) |
2490 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
2491 | elems.ht_cap_elem, sta); |
2492 | |
2493 | if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) |
2494 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
2495 | elems.vht_cap_elem, sta); |
2496 | |
2497 | /* |
2498 | * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data |
2499 | * in their association response, so ignore that data for our own |
2500 | * configuration. If it changed since the last beacon, we'll get the |
2501 | * next beacon and update then. |
2502 | */ |
2503 | |
2504 | /* |
2505 | * If an operating mode notification IE is present, override the |
2506 | * NSS calculation (that would be done in rate_control_rate_init()) |
2507 | * and use the # of streams from that element. |
2508 | */ |
2509 | if (elems.opmode_notif && |
2510 | !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { |
2511 | u8 nss; |
2512 | |
2513 | nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; |
2514 | nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; |
2515 | nss += 1; |
2516 | sta->sta.rx_nss = nss; |
2517 | } |
2518 | |
2519 | rate_control_rate_init(sta); |
2520 | |
2521 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
2522 | set_sta_flag(sta, WLAN_STA_MFP); |
2523 | |
2524 | if (elems.wmm_param) |
2525 | set_sta_flag(sta, WLAN_STA_WME); |
2526 | |
2527 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); |
2528 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
2529 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); |
2530 | if (err) { |
2531 | sdata_info(sdata, |
2532 | "failed to move station %pM to desired state\n", |
2533 | sta->sta.addr); |
2534 | WARN_ON(__sta_info_destroy(sta)); |
2535 | mutex_unlock(&sdata->local->sta_mtx); |
2536 | return false; |
2537 | } |
2538 | |
2539 | mutex_unlock(&sdata->local->sta_mtx); |
2540 | |
2541 | /* |
2542 | * Always handle WMM once after association regardless |
2543 | * of the first value the AP uses. Setting -1 here has |
2544 | * that effect because the AP values is an unsigned |
2545 | * 4-bit value. |
2546 | */ |
2547 | ifmgd->wmm_last_param_set = -1; |
2548 | |
2549 | if (elems.wmm_param) |
2550 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
2551 | elems.wmm_param_len); |
2552 | else |
2553 | ieee80211_set_wmm_default(sdata, false); |
2554 | changed |= BSS_CHANGED_QOS; |
2555 | |
2556 | /* set AID and assoc capability, |
2557 | * ieee80211_set_associated() will tell the driver */ |
2558 | bss_conf->aid = aid; |
2559 | bss_conf->assoc_capability = capab_info; |
2560 | ieee80211_set_associated(sdata, cbss, changed); |
2561 | |
2562 | /* |
2563 | * If we're using 4-addr mode, let the AP know that we're |
2564 | * doing so, so that it can create the STA VLAN on its side |
2565 | */ |
2566 | if (ifmgd->use_4addr) |
2567 | ieee80211_send_4addr_nullfunc(local, sdata); |
2568 | |
2569 | /* |
2570 | * Start timer to probe the connection to the AP now. |
2571 | * Also start the timer that will detect beacon loss. |
2572 | */ |
2573 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
2574 | ieee80211_sta_reset_beacon_monitor(sdata); |
2575 | |
2576 | return true; |
2577 | } |
2578 | |
2579 | static enum rx_mgmt_action __must_check |
2580 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
2581 | struct ieee80211_mgmt *mgmt, size_t len, |
2582 | struct cfg80211_bss **bss) |
2583 | { |
2584 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2585 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; |
2586 | u16 capab_info, status_code, aid; |
2587 | struct ieee802_11_elems elems; |
2588 | u8 *pos; |
2589 | bool reassoc; |
2590 | |
2591 | lockdep_assert_held(&ifmgd->mtx); |
2592 | |
2593 | if (!assoc_data) |
2594 | return RX_MGMT_NONE; |
2595 | if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) |
2596 | return RX_MGMT_NONE; |
2597 | |
2598 | /* |
2599 | * AssocResp and ReassocResp have identical structure, so process both |
2600 | * of them in this function. |
2601 | */ |
2602 | |
2603 | if (len < 24 + 6) |
2604 | return RX_MGMT_NONE; |
2605 | |
2606 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); |
2607 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
2608 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
2609 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
2610 | |
2611 | sdata_info(sdata, |
2612 | "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", |
2613 | reassoc ? "Rea" : "A", mgmt->sa, |
2614 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
2615 | |
2616 | pos = mgmt->u.assoc_resp.variable; |
2617 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
2618 | |
2619 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && |
2620 | elems.timeout_int && elems.timeout_int_len == 5 && |
2621 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { |
2622 | u32 tu, ms; |
2623 | tu = get_unaligned_le32(elems.timeout_int + 1); |
2624 | ms = tu * 1024 / 1000; |
2625 | sdata_info(sdata, |
2626 | "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", |
2627 | mgmt->sa, tu, ms); |
2628 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); |
2629 | assoc_data->timeout_started = true; |
2630 | if (ms > IEEE80211_ASSOC_TIMEOUT) |
2631 | run_again(ifmgd, assoc_data->timeout); |
2632 | return RX_MGMT_NONE; |
2633 | } |
2634 | |
2635 | *bss = assoc_data->bss; |
2636 | |
2637 | if (status_code != WLAN_STATUS_SUCCESS) { |
2638 | sdata_info(sdata, "%pM denied association (code=%d)\n", |
2639 | mgmt->sa, status_code); |
2640 | ieee80211_destroy_assoc_data(sdata, false); |
2641 | } else { |
2642 | if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) { |
2643 | /* oops -- internal error -- send timeout for now */ |
2644 | ieee80211_destroy_assoc_data(sdata, false); |
2645 | cfg80211_put_bss(sdata->local->hw.wiphy, *bss); |
2646 | return RX_MGMT_CFG80211_ASSOC_TIMEOUT; |
2647 | } |
2648 | sdata_info(sdata, "associated\n"); |
2649 | |
2650 | /* |
2651 | * destroy assoc_data afterwards, as otherwise an idle |
2652 | * recalc after assoc_data is NULL but before associated |
2653 | * is set can cause the interface to go idle |
2654 | */ |
2655 | ieee80211_destroy_assoc_data(sdata, true); |
2656 | } |
2657 | |
2658 | return RX_MGMT_CFG80211_RX_ASSOC; |
2659 | } |
2660 | |
2661 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
2662 | struct ieee80211_mgmt *mgmt, size_t len, |
2663 | struct ieee80211_rx_status *rx_status, |
2664 | struct ieee802_11_elems *elems) |
2665 | { |
2666 | struct ieee80211_local *local = sdata->local; |
2667 | int freq; |
2668 | struct ieee80211_bss *bss; |
2669 | struct ieee80211_channel *channel; |
2670 | bool need_ps = false; |
2671 | |
2672 | if ((sdata->u.mgd.associated && |
2673 | ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) || |
2674 | (sdata->u.mgd.assoc_data && |
2675 | ether_addr_equal(mgmt->bssid, |
2676 | sdata->u.mgd.assoc_data->bss->bssid))) { |
2677 | /* not previously set so we may need to recalc */ |
2678 | need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period; |
2679 | |
2680 | if (elems->tim && !elems->parse_error) { |
2681 | const struct ieee80211_tim_ie *tim_ie = elems->tim; |
2682 | sdata->u.mgd.dtim_period = tim_ie->dtim_period; |
2683 | } |
2684 | } |
2685 | |
2686 | if (elems->ds_params && elems->ds_params_len == 1) |
2687 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
2688 | rx_status->band); |
2689 | else |
2690 | freq = rx_status->freq; |
2691 | |
2692 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
2693 | |
2694 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
2695 | return; |
2696 | |
2697 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2698 | channel); |
2699 | if (bss) |
2700 | ieee80211_rx_bss_put(local, bss); |
2701 | |
2702 | if (!sdata->u.mgd.associated) |
2703 | return; |
2704 | |
2705 | if (need_ps) { |
2706 | mutex_lock(&local->iflist_mtx); |
2707 | ieee80211_recalc_ps(local, -1); |
2708 | mutex_unlock(&local->iflist_mtx); |
2709 | } |
2710 | |
2711 | if (elems->ch_switch_ie && |
2712 | memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0) |
2713 | ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie, |
2714 | bss, rx_status->mactime); |
2715 | } |
2716 | |
2717 | |
2718 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
2719 | struct sk_buff *skb) |
2720 | { |
2721 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
2722 | struct ieee80211_if_managed *ifmgd; |
2723 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
2724 | size_t baselen, len = skb->len; |
2725 | struct ieee802_11_elems elems; |
2726 | |
2727 | ifmgd = &sdata->u.mgd; |
2728 | |
2729 | ASSERT_MGD_MTX(ifmgd); |
2730 | |
2731 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) |
2732 | return; /* ignore ProbeResp to foreign address */ |
2733 | |
2734 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2735 | if (baselen > len) |
2736 | return; |
2737 | |
2738 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
2739 | &elems); |
2740 | |
2741 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2742 | |
2743 | if (ifmgd->associated && |
2744 | ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
2745 | ieee80211_reset_ap_probe(sdata); |
2746 | |
2747 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && |
2748 | ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { |
2749 | /* got probe response, continue with auth */ |
2750 | sdata_info(sdata, "direct probe responded\n"); |
2751 | ifmgd->auth_data->tries = 0; |
2752 | ifmgd->auth_data->timeout = jiffies; |
2753 | ifmgd->auth_data->timeout_started = true; |
2754 | run_again(ifmgd, ifmgd->auth_data->timeout); |
2755 | } |
2756 | } |
2757 | |
2758 | /* |
2759 | * This is the canonical list of information elements we care about, |
2760 | * the filter code also gives us all changes to the Microsoft OUI |
2761 | * (00:50:F2) vendor IE which is used for WMM which we need to track. |
2762 | * |
2763 | * We implement beacon filtering in software since that means we can |
2764 | * avoid processing the frame here and in cfg80211, and userspace |
2765 | * will not be able to tell whether the hardware supports it or not. |
2766 | * |
2767 | * XXX: This list needs to be dynamic -- userspace needs to be able to |
2768 | * add items it requires. It also needs to be able to tell us to |
2769 | * look out for other vendor IEs. |
2770 | */ |
2771 | static const u64 care_about_ies = |
2772 | (1ULL << WLAN_EID_COUNTRY) | |
2773 | (1ULL << WLAN_EID_ERP_INFO) | |
2774 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
2775 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
2776 | (1ULL << WLAN_EID_HT_CAPABILITY) | |
2777 | (1ULL << WLAN_EID_HT_OPERATION); |
2778 | |
2779 | static enum rx_mgmt_action |
2780 | ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
2781 | struct ieee80211_mgmt *mgmt, size_t len, |
2782 | u8 *deauth_buf, struct ieee80211_rx_status *rx_status) |
2783 | { |
2784 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2785 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
2786 | size_t baselen; |
2787 | struct ieee802_11_elems elems; |
2788 | struct ieee80211_local *local = sdata->local; |
2789 | struct ieee80211_chanctx_conf *chanctx_conf; |
2790 | struct ieee80211_channel *chan; |
2791 | struct sta_info *sta; |
2792 | u32 changed = 0; |
2793 | bool erp_valid; |
2794 | u8 erp_value = 0; |
2795 | u32 ncrc; |
2796 | u8 *bssid; |
2797 | |
2798 | lockdep_assert_held(&ifmgd->mtx); |
2799 | |
2800 | /* Process beacon from the current BSS */ |
2801 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
2802 | if (baselen > len) |
2803 | return RX_MGMT_NONE; |
2804 | |
2805 | rcu_read_lock(); |
2806 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2807 | if (!chanctx_conf) { |
2808 | rcu_read_unlock(); |
2809 | return RX_MGMT_NONE; |
2810 | } |
2811 | |
2812 | if (rx_status->freq != chanctx_conf->def.chan->center_freq) { |
2813 | rcu_read_unlock(); |
2814 | return RX_MGMT_NONE; |
2815 | } |
2816 | chan = chanctx_conf->def.chan; |
2817 | rcu_read_unlock(); |
2818 | |
2819 | if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && |
2820 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
2821 | ieee802_11_parse_elems(mgmt->u.beacon.variable, |
2822 | len - baselen, &elems); |
2823 | |
2824 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2825 | ifmgd->assoc_data->have_beacon = true; |
2826 | ifmgd->assoc_data->need_beacon = false; |
2827 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { |
2828 | sdata->vif.bss_conf.sync_tsf = |
2829 | le64_to_cpu(mgmt->u.beacon.timestamp); |
2830 | sdata->vif.bss_conf.sync_device_ts = |
2831 | rx_status->device_timestamp; |
2832 | if (elems.tim) |
2833 | sdata->vif.bss_conf.sync_dtim_count = |
2834 | elems.tim->dtim_count; |
2835 | else |
2836 | sdata->vif.bss_conf.sync_dtim_count = 0; |
2837 | } |
2838 | /* continue assoc process */ |
2839 | ifmgd->assoc_data->timeout = jiffies; |
2840 | ifmgd->assoc_data->timeout_started = true; |
2841 | run_again(ifmgd, ifmgd->assoc_data->timeout); |
2842 | return RX_MGMT_NONE; |
2843 | } |
2844 | |
2845 | if (!ifmgd->associated || |
2846 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
2847 | return RX_MGMT_NONE; |
2848 | bssid = ifmgd->associated->bssid; |
2849 | |
2850 | /* Track average RSSI from the Beacon frames of the current AP */ |
2851 | ifmgd->last_beacon_signal = rx_status->signal; |
2852 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { |
2853 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; |
2854 | ifmgd->ave_beacon_signal = rx_status->signal * 16; |
2855 | ifmgd->last_cqm_event_signal = 0; |
2856 | ifmgd->count_beacon_signal = 1; |
2857 | ifmgd->last_ave_beacon_signal = 0; |
2858 | } else { |
2859 | ifmgd->ave_beacon_signal = |
2860 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + |
2861 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * |
2862 | ifmgd->ave_beacon_signal) / 16; |
2863 | ifmgd->count_beacon_signal++; |
2864 | } |
2865 | |
2866 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && |
2867 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { |
2868 | int sig = ifmgd->ave_beacon_signal; |
2869 | int last_sig = ifmgd->last_ave_beacon_signal; |
2870 | |
2871 | /* |
2872 | * if signal crosses either of the boundaries, invoke callback |
2873 | * with appropriate parameters |
2874 | */ |
2875 | if (sig > ifmgd->rssi_max_thold && |
2876 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { |
2877 | ifmgd->last_ave_beacon_signal = sig; |
2878 | drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); |
2879 | } else if (sig < ifmgd->rssi_min_thold && |
2880 | (last_sig >= ifmgd->rssi_max_thold || |
2881 | last_sig == 0)) { |
2882 | ifmgd->last_ave_beacon_signal = sig; |
2883 | drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); |
2884 | } |
2885 | } |
2886 | |
2887 | if (bss_conf->cqm_rssi_thold && |
2888 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
2889 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
2890 | int sig = ifmgd->ave_beacon_signal / 16; |
2891 | int last_event = ifmgd->last_cqm_event_signal; |
2892 | int thold = bss_conf->cqm_rssi_thold; |
2893 | int hyst = bss_conf->cqm_rssi_hyst; |
2894 | if (sig < thold && |
2895 | (last_event == 0 || sig < last_event - hyst)) { |
2896 | ifmgd->last_cqm_event_signal = sig; |
2897 | ieee80211_cqm_rssi_notify( |
2898 | &sdata->vif, |
2899 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, |
2900 | GFP_KERNEL); |
2901 | } else if (sig > thold && |
2902 | (last_event == 0 || sig > last_event + hyst)) { |
2903 | ifmgd->last_cqm_event_signal = sig; |
2904 | ieee80211_cqm_rssi_notify( |
2905 | &sdata->vif, |
2906 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, |
2907 | GFP_KERNEL); |
2908 | } |
2909 | } |
2910 | |
2911 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
2912 | mlme_dbg_ratelimited(sdata, |
2913 | "cancelling AP probe due to a received beacon\n"); |
2914 | mutex_lock(&local->mtx); |
2915 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
2916 | ieee80211_run_deferred_scan(local); |
2917 | mutex_unlock(&local->mtx); |
2918 | |
2919 | mutex_lock(&local->iflist_mtx); |
2920 | ieee80211_recalc_ps(local, -1); |
2921 | mutex_unlock(&local->iflist_mtx); |
2922 | } |
2923 | |
2924 | /* |
2925 | * Push the beacon loss detection into the future since |
2926 | * we are processing a beacon from the AP just now. |
2927 | */ |
2928 | ieee80211_sta_reset_beacon_monitor(sdata); |
2929 | |
2930 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
2931 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, |
2932 | len - baselen, &elems, |
2933 | care_about_ies, ncrc); |
2934 | |
2935 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
2936 | bool directed_tim = ieee80211_check_tim(elems.tim, |
2937 | elems.tim_len, |
2938 | ifmgd->aid); |
2939 | if (directed_tim) { |
2940 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
2941 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
2942 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
2943 | ieee80211_hw_config(local, |
2944 | IEEE80211_CONF_CHANGE_PS); |
2945 | } |
2946 | ieee80211_send_nullfunc(local, sdata, 0); |
2947 | } else if (!local->pspolling && sdata->u.mgd.powersave) { |
2948 | local->pspolling = true; |
2949 | |
2950 | /* |
2951 | * Here is assumed that the driver will be |
2952 | * able to send ps-poll frame and receive a |
2953 | * response even though power save mode is |
2954 | * enabled, but some drivers might require |
2955 | * to disable power save here. This needs |
2956 | * to be investigated. |
2957 | */ |
2958 | ieee80211_send_pspoll(local, sdata); |
2959 | } |
2960 | } |
2961 | } |
2962 | |
2963 | if (sdata->vif.p2p) { |
2964 | u8 noa[2]; |
2965 | int ret; |
2966 | |
2967 | ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, |
2968 | len - baselen, |
2969 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, |
2970 | noa, sizeof(noa)); |
2971 | if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) { |
2972 | bss_conf->p2p_oppps = noa[1] & 0x80; |
2973 | bss_conf->p2p_ctwindow = noa[1] & 0x7f; |
2974 | changed |= BSS_CHANGED_P2P_PS; |
2975 | sdata->u.mgd.p2p_noa_index = noa[0]; |
2976 | /* |
2977 | * make sure we update all information, the CRC |
2978 | * mechanism doesn't look at P2P attributes. |
2979 | */ |
2980 | ifmgd->beacon_crc_valid = false; |
2981 | } |
2982 | } |
2983 | |
2984 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
2985 | return RX_MGMT_NONE; |
2986 | ifmgd->beacon_crc = ncrc; |
2987 | ifmgd->beacon_crc_valid = true; |
2988 | |
2989 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2990 | |
2991 | if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
2992 | elems.wmm_param_len)) |
2993 | changed |= BSS_CHANGED_QOS; |
2994 | |
2995 | /* |
2996 | * If we haven't had a beacon before, tell the driver about the |
2997 | * DTIM period (and beacon timing if desired) now. |
2998 | */ |
2999 | if (!bss_conf->dtim_period) { |
3000 | /* a few bogus AP send dtim_period = 0 or no TIM IE */ |
3001 | if (elems.tim) |
3002 | bss_conf->dtim_period = elems.tim->dtim_period ?: 1; |
3003 | else |
3004 | bss_conf->dtim_period = 1; |
3005 | |
3006 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { |
3007 | sdata->vif.bss_conf.sync_tsf = |
3008 | le64_to_cpu(mgmt->u.beacon.timestamp); |
3009 | sdata->vif.bss_conf.sync_device_ts = |
3010 | rx_status->device_timestamp; |
3011 | if (elems.tim) |
3012 | sdata->vif.bss_conf.sync_dtim_count = |
3013 | elems.tim->dtim_count; |
3014 | else |
3015 | sdata->vif.bss_conf.sync_dtim_count = 0; |
3016 | } |
3017 | |
3018 | changed |= BSS_CHANGED_DTIM_PERIOD; |
3019 | } |
3020 | |
3021 | if (elems.erp_info && elems.erp_info_len >= 1) { |
3022 | erp_valid = true; |
3023 | erp_value = elems.erp_info[0]; |
3024 | } else { |
3025 | erp_valid = false; |
3026 | } |
3027 | changed |= ieee80211_handle_bss_capability(sdata, |
3028 | le16_to_cpu(mgmt->u.beacon.capab_info), |
3029 | erp_valid, erp_value); |
3030 | |
3031 | mutex_lock(&local->sta_mtx); |
3032 | sta = sta_info_get(sdata, bssid); |
3033 | |
3034 | if (ieee80211_config_bw(sdata, sta, elems.ht_operation, |
3035 | elems.vht_operation, bssid, &changed)) { |
3036 | mutex_unlock(&local->sta_mtx); |
3037 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
3038 | WLAN_REASON_DEAUTH_LEAVING, |
3039 | true, deauth_buf); |
3040 | return RX_MGMT_CFG80211_TX_DEAUTH; |
3041 | } |
3042 | |
3043 | if (sta && elems.opmode_notif) |
3044 | ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, |
3045 | rx_status->band, true); |
3046 | mutex_unlock(&local->sta_mtx); |
3047 | |
3048 | if (elems.country_elem && elems.pwr_constr_elem && |
3049 | mgmt->u.probe_resp.capab_info & |
3050 | cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) |
3051 | changed |= ieee80211_handle_pwr_constr(sdata, chan, |
3052 | elems.country_elem, |
3053 | elems.country_elem_len, |
3054 | elems.pwr_constr_elem); |
3055 | |
3056 | ieee80211_bss_info_change_notify(sdata, changed); |
3057 | |
3058 | return RX_MGMT_NONE; |
3059 | } |
3060 | |
3061 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
3062 | struct sk_buff *skb) |
3063 | { |
3064 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3065 | struct ieee80211_rx_status *rx_status; |
3066 | struct ieee80211_mgmt *mgmt; |
3067 | struct cfg80211_bss *bss = NULL; |
3068 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
3069 | u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
3070 | u16 fc; |
3071 | |
3072 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
3073 | mgmt = (struct ieee80211_mgmt *) skb->data; |
3074 | fc = le16_to_cpu(mgmt->frame_control); |
3075 | |
3076 | mutex_lock(&ifmgd->mtx); |
3077 | |
3078 | switch (fc & IEEE80211_FCTL_STYPE) { |
3079 | case IEEE80211_STYPE_BEACON: |
3080 | rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
3081 | deauth_buf, rx_status); |
3082 | break; |
3083 | case IEEE80211_STYPE_PROBE_RESP: |
3084 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
3085 | break; |
3086 | case IEEE80211_STYPE_AUTH: |
3087 | rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); |
3088 | break; |
3089 | case IEEE80211_STYPE_DEAUTH: |
3090 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
3091 | break; |
3092 | case IEEE80211_STYPE_DISASSOC: |
3093 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
3094 | break; |
3095 | case IEEE80211_STYPE_ASSOC_RESP: |
3096 | case IEEE80211_STYPE_REASSOC_RESP: |
3097 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); |
3098 | break; |
3099 | case IEEE80211_STYPE_ACTION: |
3100 | switch (mgmt->u.action.category) { |
3101 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
3102 | ieee80211_sta_process_chanswitch(sdata, |
3103 | &mgmt->u.action.u.chan_switch.sw_elem, |
3104 | (void *)ifmgd->associated->priv, |
3105 | rx_status->mactime); |
3106 | break; |
3107 | } |
3108 | } |
3109 | mutex_unlock(&ifmgd->mtx); |
3110 | |
3111 | switch (rma) { |
3112 | case RX_MGMT_NONE: |
3113 | /* no action */ |
3114 | break; |
3115 | case RX_MGMT_CFG80211_DEAUTH: |
3116 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
3117 | break; |
3118 | case RX_MGMT_CFG80211_DISASSOC: |
3119 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
3120 | break; |
3121 | case RX_MGMT_CFG80211_RX_AUTH: |
3122 | cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len); |
3123 | break; |
3124 | case RX_MGMT_CFG80211_RX_ASSOC: |
3125 | cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len); |
3126 | break; |
3127 | case RX_MGMT_CFG80211_ASSOC_TIMEOUT: |
3128 | cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid); |
3129 | break; |
3130 | case RX_MGMT_CFG80211_TX_DEAUTH: |
3131 | cfg80211_send_deauth(sdata->dev, deauth_buf, |
3132 | sizeof(deauth_buf)); |
3133 | break; |
3134 | default: |
3135 | WARN(1, "unexpected: %d", rma); |
3136 | } |
3137 | } |
3138 | |
3139 | static void ieee80211_sta_timer(unsigned long data) |
3140 | { |
3141 | struct ieee80211_sub_if_data *sdata = |
3142 | (struct ieee80211_sub_if_data *) data; |
3143 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3144 | struct ieee80211_local *local = sdata->local; |
3145 | |
3146 | if (local->quiescing) { |
3147 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
3148 | return; |
3149 | } |
3150 | |
3151 | ieee80211_queue_work(&local->hw, &sdata->work); |
3152 | } |
3153 | |
3154 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
3155 | u8 *bssid, u8 reason, bool tx) |
3156 | { |
3157 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3158 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
3159 | |
3160 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
3161 | tx, frame_buf); |
3162 | mutex_unlock(&ifmgd->mtx); |
3163 | |
3164 | /* |
3165 | * must be outside lock due to cfg80211, |
3166 | * but that's not a problem. |
3167 | */ |
3168 | cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); |
3169 | |
3170 | mutex_lock(&ifmgd->mtx); |
3171 | } |
3172 | |
3173 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) |
3174 | { |
3175 | struct ieee80211_local *local = sdata->local; |
3176 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3177 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; |
3178 | u32 tx_flags = 0; |
3179 | |
3180 | lockdep_assert_held(&ifmgd->mtx); |
3181 | |
3182 | if (WARN_ON_ONCE(!auth_data)) |
3183 | return -EINVAL; |
3184 | |
3185 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
3186 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
3187 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
3188 | |
3189 | auth_data->tries++; |
3190 | |
3191 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { |
3192 | sdata_info(sdata, "authentication with %pM timed out\n", |
3193 | auth_data->bss->bssid); |
3194 | |
3195 | /* |
3196 | * Most likely AP is not in the range so remove the |
3197 | * bss struct for that AP. |
3198 | */ |
3199 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); |
3200 | |
3201 | return -ETIMEDOUT; |
3202 | } |
3203 | |
3204 | drv_mgd_prepare_tx(local, sdata); |
3205 | |
3206 | if (auth_data->bss->proberesp_ies) { |
3207 | u16 trans = 1; |
3208 | u16 status = 0; |
3209 | |
3210 | sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
3211 | auth_data->bss->bssid, auth_data->tries, |
3212 | IEEE80211_AUTH_MAX_TRIES); |
3213 | |
3214 | auth_data->expected_transaction = 2; |
3215 | |
3216 | if (auth_data->algorithm == WLAN_AUTH_SAE) { |
3217 | trans = auth_data->sae_trans; |
3218 | status = auth_data->sae_status; |
3219 | auth_data->expected_transaction = trans; |
3220 | } |
3221 | |
3222 | ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, |
3223 | auth_data->data, auth_data->data_len, |
3224 | auth_data->bss->bssid, |
3225 | auth_data->bss->bssid, NULL, 0, 0, |
3226 | tx_flags); |
3227 | } else { |
3228 | const u8 *ssidie; |
3229 | |
3230 | sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", |
3231 | auth_data->bss->bssid, auth_data->tries, |
3232 | IEEE80211_AUTH_MAX_TRIES); |
3233 | |
3234 | rcu_read_lock(); |
3235 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); |
3236 | if (!ssidie) { |
3237 | rcu_read_unlock(); |
3238 | return -EINVAL; |
3239 | } |
3240 | /* |
3241 | * Direct probe is sent to broadcast address as some APs |
3242 | * will not answer to direct packet in unassociated state. |
3243 | */ |
3244 | ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], |
3245 | NULL, 0, (u32) -1, true, tx_flags, |
3246 | auth_data->bss->channel, false); |
3247 | rcu_read_unlock(); |
3248 | } |
3249 | |
3250 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { |
3251 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; |
3252 | ifmgd->auth_data->timeout_started = true; |
3253 | run_again(ifmgd, auth_data->timeout); |
3254 | } else { |
3255 | auth_data->timeout_started = false; |
3256 | } |
3257 | |
3258 | return 0; |
3259 | } |
3260 | |
3261 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) |
3262 | { |
3263 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; |
3264 | struct ieee80211_local *local = sdata->local; |
3265 | |
3266 | lockdep_assert_held(&sdata->u.mgd.mtx); |
3267 | |
3268 | assoc_data->tries++; |
3269 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { |
3270 | sdata_info(sdata, "association with %pM timed out\n", |
3271 | assoc_data->bss->bssid); |
3272 | |
3273 | /* |
3274 | * Most likely AP is not in the range so remove the |
3275 | * bss struct for that AP. |
3276 | */ |
3277 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); |
3278 | |
3279 | return -ETIMEDOUT; |
3280 | } |
3281 | |
3282 | sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
3283 | assoc_data->bss->bssid, assoc_data->tries, |
3284 | IEEE80211_ASSOC_MAX_TRIES); |
3285 | ieee80211_send_assoc(sdata); |
3286 | |
3287 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { |
3288 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; |
3289 | assoc_data->timeout_started = true; |
3290 | run_again(&sdata->u.mgd, assoc_data->timeout); |
3291 | } else { |
3292 | assoc_data->timeout_started = false; |
3293 | } |
3294 | |
3295 | return 0; |
3296 | } |
3297 | |
3298 | void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, |
3299 | __le16 fc, bool acked) |
3300 | { |
3301 | struct ieee80211_local *local = sdata->local; |
3302 | |
3303 | sdata->u.mgd.status_fc = fc; |
3304 | sdata->u.mgd.status_acked = acked; |
3305 | sdata->u.mgd.status_received = true; |
3306 | |
3307 | ieee80211_queue_work(&local->hw, &sdata->work); |
3308 | } |
3309 | |
3310 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
3311 | { |
3312 | struct ieee80211_local *local = sdata->local; |
3313 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3314 | |
3315 | mutex_lock(&ifmgd->mtx); |
3316 | |
3317 | if (ifmgd->status_received) { |
3318 | __le16 fc = ifmgd->status_fc; |
3319 | bool status_acked = ifmgd->status_acked; |
3320 | |
3321 | ifmgd->status_received = false; |
3322 | if (ifmgd->auth_data && |
3323 | (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { |
3324 | if (status_acked) { |
3325 | ifmgd->auth_data->timeout = |
3326 | jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; |
3327 | run_again(ifmgd, ifmgd->auth_data->timeout); |
3328 | } else { |
3329 | ifmgd->auth_data->timeout = jiffies - 1; |
3330 | } |
3331 | ifmgd->auth_data->timeout_started = true; |
3332 | } else if (ifmgd->assoc_data && |
3333 | (ieee80211_is_assoc_req(fc) || |
3334 | ieee80211_is_reassoc_req(fc))) { |
3335 | if (status_acked) { |
3336 | ifmgd->assoc_data->timeout = |
3337 | jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; |
3338 | run_again(ifmgd, ifmgd->assoc_data->timeout); |
3339 | } else { |
3340 | ifmgd->assoc_data->timeout = jiffies - 1; |
3341 | } |
3342 | ifmgd->assoc_data->timeout_started = true; |
3343 | } |
3344 | } |
3345 | |
3346 | if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && |
3347 | time_after(jiffies, ifmgd->auth_data->timeout)) { |
3348 | if (ifmgd->auth_data->done) { |
3349 | /* |
3350 | * ok ... we waited for assoc but userspace didn't, |
3351 | * so let's just kill the auth data |
3352 | */ |
3353 | ieee80211_destroy_auth_data(sdata, false); |
3354 | } else if (ieee80211_probe_auth(sdata)) { |
3355 | u8 bssid[ETH_ALEN]; |
3356 | |
3357 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); |
3358 | |
3359 | ieee80211_destroy_auth_data(sdata, false); |
3360 | |
3361 | mutex_unlock(&ifmgd->mtx); |
3362 | cfg80211_send_auth_timeout(sdata->dev, bssid); |
3363 | mutex_lock(&ifmgd->mtx); |
3364 | } |
3365 | } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) |
3366 | run_again(ifmgd, ifmgd->auth_data->timeout); |
3367 | |
3368 | if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && |
3369 | time_after(jiffies, ifmgd->assoc_data->timeout)) { |
3370 | if ((ifmgd->assoc_data->need_beacon && |
3371 | !ifmgd->assoc_data->have_beacon) || |
3372 | ieee80211_do_assoc(sdata)) { |
3373 | u8 bssid[ETH_ALEN]; |
3374 | |
3375 | memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN); |
3376 | |
3377 | ieee80211_destroy_assoc_data(sdata, false); |
3378 | |
3379 | mutex_unlock(&ifmgd->mtx); |
3380 | cfg80211_send_assoc_timeout(sdata->dev, bssid); |
3381 | mutex_lock(&ifmgd->mtx); |
3382 | } |
3383 | } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) |
3384 | run_again(ifmgd, ifmgd->assoc_data->timeout); |
3385 | |
3386 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
3387 | IEEE80211_STA_CONNECTION_POLL) && |
3388 | ifmgd->associated) { |
3389 | u8 bssid[ETH_ALEN]; |
3390 | int max_tries; |
3391 | |
3392 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
3393 | |
3394 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
3395 | max_tries = max_nullfunc_tries; |
3396 | else |
3397 | max_tries = max_probe_tries; |
3398 | |
3399 | /* ACK received for nullfunc probing frame */ |
3400 | if (!ifmgd->probe_send_count) |
3401 | ieee80211_reset_ap_probe(sdata); |
3402 | else if (ifmgd->nullfunc_failed) { |
3403 | if (ifmgd->probe_send_count < max_tries) { |
3404 | mlme_dbg(sdata, |
3405 | "No ack for nullfunc frame to AP %pM, try %d/%i\n", |
3406 | bssid, ifmgd->probe_send_count, |
3407 | max_tries); |
3408 | ieee80211_mgd_probe_ap_send(sdata); |
3409 | } else { |
3410 | mlme_dbg(sdata, |
3411 | "No ack for nullfunc frame to AP %pM, disconnecting.\n", |
3412 | bssid); |
3413 | ieee80211_sta_connection_lost(sdata, bssid, |
3414 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
3415 | false); |
3416 | } |
3417 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) |
3418 | run_again(ifmgd, ifmgd->probe_timeout); |
3419 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
3420 | mlme_dbg(sdata, |
3421 | "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", |
3422 | bssid, probe_wait_ms); |
3423 | ieee80211_sta_connection_lost(sdata, bssid, |
3424 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
3425 | } else if (ifmgd->probe_send_count < max_tries) { |
3426 | mlme_dbg(sdata, |
3427 | "No probe response from AP %pM after %dms, try %d/%i\n", |
3428 | bssid, probe_wait_ms, |
3429 | ifmgd->probe_send_count, max_tries); |
3430 | ieee80211_mgd_probe_ap_send(sdata); |
3431 | } else { |
3432 | /* |
3433 | * We actually lost the connection ... or did we? |
3434 | * Let's make sure! |
3435 | */ |
3436 | wiphy_debug(local->hw.wiphy, |
3437 | "%s: No probe response from AP %pM" |
3438 | " after %dms, disconnecting.\n", |
3439 | sdata->name, |
3440 | bssid, probe_wait_ms); |
3441 | |
3442 | ieee80211_sta_connection_lost(sdata, bssid, |
3443 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); |
3444 | } |
3445 | } |
3446 | |
3447 | mutex_unlock(&ifmgd->mtx); |
3448 | } |
3449 | |
3450 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
3451 | { |
3452 | struct ieee80211_sub_if_data *sdata = |
3453 | (struct ieee80211_sub_if_data *) data; |
3454 | struct ieee80211_local *local = sdata->local; |
3455 | |
3456 | if (local->quiescing) |
3457 | return; |
3458 | |
3459 | sdata->u.mgd.connection_loss = false; |
3460 | ieee80211_queue_work(&sdata->local->hw, |
3461 | &sdata->u.mgd.beacon_connection_loss_work); |
3462 | } |
3463 | |
3464 | static void ieee80211_sta_conn_mon_timer(unsigned long data) |
3465 | { |
3466 | struct ieee80211_sub_if_data *sdata = |
3467 | (struct ieee80211_sub_if_data *) data; |
3468 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3469 | struct ieee80211_local *local = sdata->local; |
3470 | |
3471 | if (local->quiescing) |
3472 | return; |
3473 | |
3474 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
3475 | } |
3476 | |
3477 | static void ieee80211_sta_monitor_work(struct work_struct *work) |
3478 | { |
3479 | struct ieee80211_sub_if_data *sdata = |
3480 | container_of(work, struct ieee80211_sub_if_data, |
3481 | u.mgd.monitor_work); |
3482 | |
3483 | ieee80211_mgd_probe_ap(sdata, false); |
3484 | } |
3485 | |
3486 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3487 | { |
3488 | u32 flags; |
3489 | |
3490 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
3491 | __ieee80211_stop_poll(sdata); |
3492 | |
3493 | /* let's probe the connection once */ |
3494 | flags = sdata->local->hw.flags; |
3495 | if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) |
3496 | ieee80211_queue_work(&sdata->local->hw, |
3497 | &sdata->u.mgd.monitor_work); |
3498 | /* and do all the other regular work too */ |
3499 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
3500 | } |
3501 | } |
3502 | |
3503 | #ifdef CONFIG_PM |
3504 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) |
3505 | { |
3506 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3507 | |
3508 | /* |
3509 | * Stop timers before deleting work items, as timers |
3510 | * could race and re-add the work-items. They will be |
3511 | * re-established on connection. |
3512 | */ |
3513 | del_timer_sync(&ifmgd->conn_mon_timer); |
3514 | del_timer_sync(&ifmgd->bcn_mon_timer); |
3515 | |
3516 | /* |
3517 | * we need to use atomic bitops for the running bits |
3518 | * only because both timers might fire at the same |
3519 | * time -- the code here is properly synchronised. |
3520 | */ |
3521 | |
3522 | cancel_work_sync(&ifmgd->request_smps_work); |
3523 | |
3524 | cancel_work_sync(&ifmgd->monitor_work); |
3525 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
3526 | cancel_work_sync(&ifmgd->csa_connection_drop_work); |
3527 | if (del_timer_sync(&ifmgd->timer)) |
3528 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
3529 | |
3530 | if (del_timer_sync(&ifmgd->chswitch_timer)) |
3531 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
3532 | cancel_work_sync(&ifmgd->chswitch_work); |
3533 | } |
3534 | |
3535 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
3536 | { |
3537 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3538 | |
3539 | mutex_lock(&ifmgd->mtx); |
3540 | if (!ifmgd->associated) { |
3541 | mutex_unlock(&ifmgd->mtx); |
3542 | return; |
3543 | } |
3544 | |
3545 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
3546 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; |
3547 | mlme_dbg(sdata, "driver requested disconnect after resume\n"); |
3548 | ieee80211_sta_connection_lost(sdata, |
3549 | ifmgd->associated->bssid, |
3550 | WLAN_REASON_UNSPECIFIED, |
3551 | true); |
3552 | mutex_unlock(&ifmgd->mtx); |
3553 | return; |
3554 | } |
3555 | mutex_unlock(&ifmgd->mtx); |
3556 | |
3557 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
3558 | add_timer(&ifmgd->timer); |
3559 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) |
3560 | add_timer(&ifmgd->chswitch_timer); |
3561 | ieee80211_sta_reset_beacon_monitor(sdata); |
3562 | |
3563 | mutex_lock(&sdata->local->mtx); |
3564 | ieee80211_restart_sta_timer(sdata); |
3565 | mutex_unlock(&sdata->local->mtx); |
3566 | } |
3567 | #endif |
3568 | |
3569 | /* interface setup */ |
3570 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
3571 | { |
3572 | struct ieee80211_if_managed *ifmgd; |
3573 | |
3574 | ifmgd = &sdata->u.mgd; |
3575 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
3576 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
3577 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
3578 | ieee80211_beacon_connection_loss_work); |
3579 | INIT_WORK(&ifmgd->csa_connection_drop_work, |
3580 | ieee80211_csa_connection_drop_work); |
3581 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work); |
3582 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
3583 | (unsigned long) sdata); |
3584 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
3585 | (unsigned long) sdata); |
3586 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, |
3587 | (unsigned long) sdata); |
3588 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
3589 | (unsigned long) sdata); |
3590 | |
3591 | ifmgd->flags = 0; |
3592 | ifmgd->powersave = sdata->wdev.ps; |
3593 | ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
3594 | ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; |
3595 | |
3596 | mutex_init(&ifmgd->mtx); |
3597 | |
3598 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) |
3599 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; |
3600 | else |
3601 | ifmgd->req_smps = IEEE80211_SMPS_OFF; |
3602 | } |
3603 | |
3604 | /* scan finished notification */ |
3605 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
3606 | { |
3607 | struct ieee80211_sub_if_data *sdata; |
3608 | |
3609 | /* Restart STA timers */ |
3610 | rcu_read_lock(); |
3611 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3612 | if (ieee80211_sdata_running(sdata)) |
3613 | ieee80211_restart_sta_timer(sdata); |
3614 | } |
3615 | rcu_read_unlock(); |
3616 | } |
3617 | |
3618 | int ieee80211_max_network_latency(struct notifier_block *nb, |
3619 | unsigned long data, void *dummy) |
3620 | { |
3621 | s32 latency_usec = (s32) data; |
3622 | struct ieee80211_local *local = |
3623 | container_of(nb, struct ieee80211_local, |
3624 | network_latency_notifier); |
3625 | |
3626 | mutex_lock(&local->iflist_mtx); |
3627 | ieee80211_recalc_ps(local, latency_usec); |
3628 | mutex_unlock(&local->iflist_mtx); |
3629 | |
3630 | return 0; |
3631 | } |
3632 | |
3633 | static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, |
3634 | struct cfg80211_bss *cbss) |
3635 | { |
3636 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3637 | const u8 *ht_cap_ie, *vht_cap_ie; |
3638 | const struct ieee80211_ht_cap *ht_cap; |
3639 | const struct ieee80211_vht_cap *vht_cap; |
3640 | u8 chains = 1; |
3641 | |
3642 | if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) |
3643 | return chains; |
3644 | |
3645 | ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); |
3646 | if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { |
3647 | ht_cap = (void *)(ht_cap_ie + 2); |
3648 | chains = ieee80211_mcs_to_chains(&ht_cap->mcs); |
3649 | /* |
3650 | * TODO: use "Tx Maximum Number Spatial Streams Supported" and |
3651 | * "Tx Unequal Modulation Supported" fields. |
3652 | */ |
3653 | } |
3654 | |
3655 | if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) |
3656 | return chains; |
3657 | |
3658 | vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); |
3659 | if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { |
3660 | u8 nss; |
3661 | u16 tx_mcs_map; |
3662 | |
3663 | vht_cap = (void *)(vht_cap_ie + 2); |
3664 | tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); |
3665 | for (nss = 8; nss > 0; nss--) { |
3666 | if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != |
3667 | IEEE80211_VHT_MCS_NOT_SUPPORTED) |
3668 | break; |
3669 | } |
3670 | /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ |
3671 | chains = max(chains, nss); |
3672 | } |
3673 | |
3674 | return chains; |
3675 | } |
3676 | |
3677 | static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, |
3678 | struct cfg80211_bss *cbss) |
3679 | { |
3680 | struct ieee80211_local *local = sdata->local; |
3681 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3682 | const struct ieee80211_ht_operation *ht_oper = NULL; |
3683 | const struct ieee80211_vht_operation *vht_oper = NULL; |
3684 | struct ieee80211_supported_band *sband; |
3685 | struct cfg80211_chan_def chandef; |
3686 | int ret; |
3687 | |
3688 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
3689 | |
3690 | ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | |
3691 | IEEE80211_STA_DISABLE_80P80MHZ | |
3692 | IEEE80211_STA_DISABLE_160MHZ); |
3693 | |
3694 | rcu_read_lock(); |
3695 | |
3696 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && |
3697 | sband->ht_cap.ht_supported) { |
3698 | const u8 *ht_oper_ie, *ht_cap; |
3699 | |
3700 | ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); |
3701 | if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) |
3702 | ht_oper = (void *)(ht_oper_ie + 2); |
3703 | |
3704 | ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); |
3705 | if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) { |
3706 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
3707 | ht_oper = NULL; |
3708 | } |
3709 | } |
3710 | |
3711 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && |
3712 | sband->vht_cap.vht_supported) { |
3713 | const u8 *vht_oper_ie, *vht_cap; |
3714 | |
3715 | vht_oper_ie = ieee80211_bss_get_ie(cbss, |
3716 | WLAN_EID_VHT_OPERATION); |
3717 | if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) |
3718 | vht_oper = (void *)(vht_oper_ie + 2); |
3719 | if (vht_oper && !ht_oper) { |
3720 | vht_oper = NULL; |
3721 | sdata_info(sdata, |
3722 | "AP advertised VHT without HT, disabling both\n"); |
3723 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
3724 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
3725 | } |
3726 | |
3727 | vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); |
3728 | if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { |
3729 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
3730 | vht_oper = NULL; |
3731 | } |
3732 | } |
3733 | |
3734 | ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, |
3735 | cbss->channel, |
3736 | ht_oper, vht_oper, |
3737 | &chandef, true); |
3738 | |
3739 | sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), |
3740 | local->rx_chains); |
3741 | |
3742 | rcu_read_unlock(); |
3743 | |
3744 | /* will change later if needed */ |
3745 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
3746 | |
3747 | /* |
3748 | * If this fails (possibly due to channel context sharing |
3749 | * on incompatible channels, e.g. 80+80 and 160 sharing the |
3750 | * same control channel) try to use a smaller bandwidth. |
3751 | */ |
3752 | ret = ieee80211_vif_use_channel(sdata, &chandef, |
3753 | IEEE80211_CHANCTX_SHARED); |
3754 | while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { |
3755 | ifmgd->flags |= chandef_downgrade(&chandef); |
3756 | ret = ieee80211_vif_use_channel(sdata, &chandef, |
3757 | IEEE80211_CHANCTX_SHARED); |
3758 | } |
3759 | return ret; |
3760 | } |
3761 | |
3762 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, |
3763 | struct cfg80211_bss *cbss, bool assoc) |
3764 | { |
3765 | struct ieee80211_local *local = sdata->local; |
3766 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3767 | struct ieee80211_bss *bss = (void *)cbss->priv; |
3768 | struct sta_info *new_sta = NULL; |
3769 | bool have_sta = false; |
3770 | int err; |
3771 | |
3772 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) |
3773 | return -EINVAL; |
3774 | |
3775 | if (assoc) { |
3776 | rcu_read_lock(); |
3777 | have_sta = sta_info_get(sdata, cbss->bssid); |
3778 | rcu_read_unlock(); |
3779 | } |
3780 | |
3781 | if (!have_sta) { |
3782 | new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
3783 | if (!new_sta) |
3784 | return -ENOMEM; |
3785 | } |
3786 | |
3787 | if (new_sta) { |
3788 | u32 rates = 0, basic_rates = 0; |
3789 | bool have_higher_than_11mbit; |
3790 | int min_rate = INT_MAX, min_rate_index = -1; |
3791 | struct ieee80211_supported_band *sband; |
3792 | const struct cfg80211_bss_ies *ies; |
3793 | |
3794 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
3795 | |
3796 | err = ieee80211_prep_channel(sdata, cbss); |
3797 | if (err) { |
3798 | sta_info_free(local, new_sta); |
3799 | return err; |
3800 | } |
3801 | |
3802 | ieee80211_get_rates(sband, bss->supp_rates, |
3803 | bss->supp_rates_len, |
3804 | &rates, &basic_rates, |
3805 | &have_higher_than_11mbit, |
3806 | &min_rate, &min_rate_index); |
3807 | |
3808 | /* |
3809 | * This used to be a workaround for basic rates missing |
3810 | * in the association response frame. Now that we no |
3811 | * longer use the basic rates from there, it probably |
3812 | * doesn't happen any more, but keep the workaround so |
3813 | * in case some *other* APs are buggy in different ways |
3814 | * we can connect -- with a warning. |
3815 | */ |
3816 | if (!basic_rates && min_rate_index >= 0) { |
3817 | sdata_info(sdata, |
3818 | "No basic rates, using min rate instead\n"); |
3819 | basic_rates = BIT(min_rate_index); |
3820 | } |
3821 | |
3822 | new_sta->sta.supp_rates[cbss->channel->band] = rates; |
3823 | sdata->vif.bss_conf.basic_rates = basic_rates; |
3824 | |
3825 | /* cf. IEEE 802.11 9.2.12 */ |
3826 | if (cbss->channel->band == IEEE80211_BAND_2GHZ && |
3827 | have_higher_than_11mbit) |
3828 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
3829 | else |
3830 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
3831 | |
3832 | memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); |
3833 | |
3834 | /* set timing information */ |
3835 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
3836 | rcu_read_lock(); |
3837 | ies = rcu_dereference(cbss->beacon_ies); |
3838 | if (ies) { |
3839 | const u8 *tim_ie; |
3840 | |
3841 | sdata->vif.bss_conf.sync_tsf = ies->tsf; |
3842 | sdata->vif.bss_conf.sync_device_ts = |
3843 | bss->device_ts_beacon; |
3844 | tim_ie = cfg80211_find_ie(WLAN_EID_TIM, |
3845 | ies->data, ies->len); |
3846 | if (tim_ie && tim_ie[1] >= 2) |
3847 | sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; |
3848 | else |
3849 | sdata->vif.bss_conf.sync_dtim_count = 0; |
3850 | } else if (!(local->hw.flags & |
3851 | IEEE80211_HW_TIMING_BEACON_ONLY)) { |
3852 | ies = rcu_dereference(cbss->proberesp_ies); |
3853 | /* must be non-NULL since beacon IEs were NULL */ |
3854 | sdata->vif.bss_conf.sync_tsf = ies->tsf; |
3855 | sdata->vif.bss_conf.sync_device_ts = |
3856 | bss->device_ts_presp; |
3857 | sdata->vif.bss_conf.sync_dtim_count = 0; |
3858 | } else { |
3859 | sdata->vif.bss_conf.sync_tsf = 0; |
3860 | sdata->vif.bss_conf.sync_device_ts = 0; |
3861 | sdata->vif.bss_conf.sync_dtim_count = 0; |
3862 | } |
3863 | rcu_read_unlock(); |
3864 | |
3865 | /* tell driver about BSSID, basic rates and timing */ |
3866 | ieee80211_bss_info_change_notify(sdata, |
3867 | BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | |
3868 | BSS_CHANGED_BEACON_INT); |
3869 | |
3870 | if (assoc) |
3871 | sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); |
3872 | |
3873 | err = sta_info_insert(new_sta); |
3874 | new_sta = NULL; |
3875 | if (err) { |
3876 | sdata_info(sdata, |
3877 | "failed to insert STA entry for the AP (error %d)\n", |
3878 | err); |
3879 | return err; |
3880 | } |
3881 | } else |
3882 | WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); |
3883 | |
3884 | return 0; |
3885 | } |
3886 | |
3887 | /* config hooks */ |
3888 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
3889 | struct cfg80211_auth_request *req) |
3890 | { |
3891 | struct ieee80211_local *local = sdata->local; |
3892 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
3893 | struct ieee80211_mgd_auth_data *auth_data; |
3894 | u16 auth_alg; |
3895 | int err; |
3896 | |
3897 | /* prepare auth data structure */ |
3898 | |
3899 | switch (req->auth_type) { |
3900 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
3901 | auth_alg = WLAN_AUTH_OPEN; |
3902 | break; |
3903 | case NL80211_AUTHTYPE_SHARED_KEY: |
3904 | if (IS_ERR(local->wep_tx_tfm)) |
3905 | return -EOPNOTSUPP; |
3906 | auth_alg = WLAN_AUTH_SHARED_KEY; |
3907 | break; |
3908 | case NL80211_AUTHTYPE_FT: |
3909 | auth_alg = WLAN_AUTH_FT; |
3910 | break; |
3911 | case NL80211_AUTHTYPE_NETWORK_EAP: |
3912 | auth_alg = WLAN_AUTH_LEAP; |
3913 | break; |
3914 | case NL80211_AUTHTYPE_SAE: |
3915 | auth_alg = WLAN_AUTH_SAE; |
3916 | break; |
3917 | default: |
3918 | return -EOPNOTSUPP; |
3919 | } |
3920 | |
3921 | auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + |
3922 | req->ie_len, GFP_KERNEL); |
3923 | if (!auth_data) |
3924 | return -ENOMEM; |
3925 | |
3926 | auth_data->bss = req->bss; |
3927 | |
3928 | if (req->sae_data_len >= 4) { |
3929 | __le16 *pos = (__le16 *) req->sae_data; |
3930 | auth_data->sae_trans = le16_to_cpu(pos[0]); |
3931 | auth_data->sae_status = le16_to_cpu(pos[1]); |
3932 | memcpy(auth_data->data, req->sae_data + 4, |
3933 | req->sae_data_len - 4); |
3934 | auth_data->data_len += req->sae_data_len - 4; |
3935 | } |
3936 | |
3937 | if (req->ie && req->ie_len) { |
3938 | memcpy(&auth_data->data[auth_data->data_len], |
3939 | req->ie, req->ie_len); |
3940 | auth_data->data_len += req->ie_len; |
3941 | } |
3942 | |
3943 | if (req->key && req->key_len) { |
3944 | auth_data->key_len = req->key_len; |
3945 | auth_data->key_idx = req->key_idx; |
3946 | memcpy(auth_data->key, req->key, req->key_len); |
3947 | } |
3948 | |
3949 | auth_data->algorithm = auth_alg; |
3950 | |
3951 | /* try to authenticate/probe */ |
3952 | |
3953 | mutex_lock(&ifmgd->mtx); |
3954 | |
3955 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || |
3956 | ifmgd->assoc_data) { |
3957 | err = -EBUSY; |
3958 | goto err_free; |
3959 | } |
3960 | |
3961 | if (ifmgd->auth_data) |
3962 | ieee80211_destroy_auth_data(sdata, false); |
3963 | |
3964 | /* prep auth_data so we don't go into idle on disassoc */ |
3965 | ifmgd->auth_data = auth_data; |
3966 | |
3967 | if (ifmgd->associated) { |
3968 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
3969 | |
3970 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
3971 | WLAN_REASON_UNSPECIFIED, |
3972 | false, frame_buf); |
3973 | |
3974 | __cfg80211_send_deauth(sdata->dev, frame_buf, |
3975 | sizeof(frame_buf)); |
3976 | } |
3977 | |
3978 | sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); |
3979 | |
3980 | err = ieee80211_prep_connection(sdata, req->bss, false); |
3981 | if (err) |
3982 | goto err_clear; |
3983 | |
3984 | err = ieee80211_probe_auth(sdata); |
3985 | if (err) { |
3986 | sta_info_destroy_addr(sdata, req->bss->bssid); |
3987 | goto err_clear; |
3988 | } |
3989 | |
3990 | /* hold our own reference */ |
3991 | cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); |
3992 | err = 0; |
3993 | goto out_unlock; |
3994 | |
3995 | err_clear: |
3996 | memset(ifmgd->bssid, 0, ETH_ALEN); |
3997 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
3998 | ifmgd->auth_data = NULL; |
3999 | err_free: |
4000 | kfree(auth_data); |
4001 | out_unlock: |
4002 | mutex_unlock(&ifmgd->mtx); |
4003 | |
4004 | return err; |
4005 | } |
4006 | |
4007 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
4008 | struct cfg80211_assoc_request *req) |
4009 | { |
4010 | struct ieee80211_local *local = sdata->local; |
4011 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
4012 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
4013 | struct ieee80211_mgd_assoc_data *assoc_data; |
4014 | const struct cfg80211_bss_ies *beacon_ies; |
4015 | struct ieee80211_supported_band *sband; |
4016 | const u8 *ssidie, *ht_ie, *vht_ie; |
4017 | int i, err; |
4018 | |
4019 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); |
4020 | if (!assoc_data) |
4021 | return -ENOMEM; |
4022 | |
4023 | rcu_read_lock(); |
4024 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
4025 | if (!ssidie) { |
4026 | rcu_read_unlock(); |
4027 | kfree(assoc_data); |
4028 | return -EINVAL; |
4029 | } |
4030 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); |
4031 | assoc_data->ssid_len = ssidie[1]; |
4032 | rcu_read_unlock(); |
4033 | |
4034 | mutex_lock(&ifmgd->mtx); |
4035 | |
4036 | if (ifmgd->associated) { |
4037 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
4038 | |
4039 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
4040 | WLAN_REASON_UNSPECIFIED, |
4041 | false, frame_buf); |
4042 | |
4043 | __cfg80211_send_deauth(sdata->dev, frame_buf, |
4044 | sizeof(frame_buf)); |
4045 | } |
4046 | |
4047 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { |
4048 | err = -EBUSY; |
4049 | goto err_free; |
4050 | } |
4051 | |
4052 | if (ifmgd->assoc_data) { |
4053 | err = -EBUSY; |
4054 | goto err_free; |
4055 | } |
4056 | |
4057 | if (ifmgd->auth_data) { |
4058 | bool match; |
4059 | |
4060 | /* keep sta info, bssid if matching */ |
4061 | match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
4062 | ieee80211_destroy_auth_data(sdata, match); |
4063 | } |
4064 | |
4065 | /* prepare assoc data */ |
4066 | |
4067 | ifmgd->beacon_crc_valid = false; |
4068 | |
4069 | /* |
4070 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. |
4071 | * We still associate in non-HT mode (11a/b/g) if any one of these |
4072 | * ciphers is configured as pairwise. |
4073 | * We can set this to true for non-11n hardware, that'll be checked |
4074 | * separately along with the peer capabilities. |
4075 | */ |
4076 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { |
4077 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
4078 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
4079 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { |
4080 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
4081 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
4082 | netdev_info(sdata->dev, |
4083 | "disabling HT/VHT due to WEP/TKIP use\n"); |
4084 | } |
4085 | } |
4086 | |
4087 | if (req->flags & ASSOC_REQ_DISABLE_HT) { |
4088 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
4089 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
4090 | } |
4091 | |
4092 | /* Also disable HT if we don't support it or the AP doesn't use WMM */ |
4093 | sband = local->hw.wiphy->bands[req->bss->channel->band]; |
4094 | if (!sband->ht_cap.ht_supported || |
4095 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) { |
4096 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
4097 | if (!bss->wmm_used) |
4098 | netdev_info(sdata->dev, |
4099 | "disabling HT as WMM/QoS is not supported by the AP\n"); |
4100 | } |
4101 | |
4102 | /* disable VHT if we don't support it or the AP doesn't use WMM */ |
4103 | if (!sband->vht_cap.vht_supported || |
4104 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) { |
4105 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
4106 | if (!bss->wmm_used) |
4107 | netdev_info(sdata->dev, |
4108 | "disabling VHT as WMM/QoS is not supported by the AP\n"); |
4109 | } |
4110 | |
4111 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
4112 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, |
4113 | sizeof(ifmgd->ht_capa_mask)); |
4114 | |
4115 | if (req->ie && req->ie_len) { |
4116 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
4117 | assoc_data->ie_len = req->ie_len; |
4118 | } |
4119 | |
4120 | assoc_data->bss = req->bss; |
4121 | |
4122 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
4123 | if (ifmgd->powersave) |
4124 | sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
4125 | else |
4126 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
4127 | } else |
4128 | sdata->smps_mode = ifmgd->req_smps; |
4129 | |
4130 | assoc_data->capability = req->bss->capability; |
4131 | assoc_data->wmm = bss->wmm_used && |
4132 | (local->hw.queues >= IEEE80211_NUM_ACS); |
4133 | assoc_data->supp_rates = bss->supp_rates; |
4134 | assoc_data->supp_rates_len = bss->supp_rates_len; |
4135 | |
4136 | rcu_read_lock(); |
4137 | ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); |
4138 | if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) |
4139 | assoc_data->ap_ht_param = |
4140 | ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; |
4141 | else |
4142 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; |
4143 | vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); |
4144 | if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) |
4145 | memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, |
4146 | sizeof(struct ieee80211_vht_cap)); |
4147 | else |
4148 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; |
4149 | rcu_read_unlock(); |
4150 | |
4151 | if (bss->wmm_used && bss->uapsd_supported && |
4152 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { |
4153 | assoc_data->uapsd = true; |
4154 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
4155 | } else { |
4156 | assoc_data->uapsd = false; |
4157 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
4158 | } |
4159 | |
4160 | if (req->prev_bssid) |
4161 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); |
4162 | |
4163 | if (req->use_mfp) { |
4164 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; |
4165 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; |
4166 | } else { |
4167 | ifmgd->mfp = IEEE80211_MFP_DISABLED; |
4168 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; |
4169 | } |
4170 | |
4171 | if (req->crypto.control_port) |
4172 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; |
4173 | else |
4174 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; |
4175 | |
4176 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
4177 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; |
4178 | |
4179 | /* kick off associate process */ |
4180 | |
4181 | ifmgd->assoc_data = assoc_data; |
4182 | ifmgd->dtim_period = 0; |
4183 | |
4184 | err = ieee80211_prep_connection(sdata, req->bss, true); |
4185 | if (err) |
4186 | goto err_clear; |
4187 | |
4188 | rcu_read_lock(); |
4189 | beacon_ies = rcu_dereference(req->bss->beacon_ies); |
4190 | |
4191 | if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && |
4192 | !beacon_ies) { |
4193 | /* |
4194 | * Wait up to one beacon interval ... |
4195 | * should this be more if we miss one? |
4196 | */ |
4197 | sdata_info(sdata, "waiting for beacon from %pM\n", |
4198 | ifmgd->bssid); |
4199 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); |
4200 | assoc_data->timeout_started = true; |
4201 | assoc_data->need_beacon = true; |
4202 | } else if (beacon_ies) { |
4203 | const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, |
4204 | beacon_ies->data, |
4205 | beacon_ies->len); |
4206 | u8 dtim_count = 0; |
4207 | |
4208 | if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { |
4209 | const struct ieee80211_tim_ie *tim; |
4210 | tim = (void *)(tim_ie + 2); |
4211 | ifmgd->dtim_period = tim->dtim_period; |
4212 | dtim_count = tim->dtim_count; |
4213 | } |
4214 | assoc_data->have_beacon = true; |
4215 | assoc_data->timeout = jiffies; |
4216 | assoc_data->timeout_started = true; |
4217 | |
4218 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { |
4219 | sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; |
4220 | sdata->vif.bss_conf.sync_device_ts = |
4221 | bss->device_ts_beacon; |
4222 | sdata->vif.bss_conf.sync_dtim_count = dtim_count; |
4223 | } |
4224 | } else { |
4225 | assoc_data->timeout = jiffies; |
4226 | assoc_data->timeout_started = true; |
4227 | } |
4228 | rcu_read_unlock(); |
4229 | |
4230 | run_again(ifmgd, assoc_data->timeout); |
4231 | |
4232 | if (bss->corrupt_data) { |
4233 | char *corrupt_type = "data"; |
4234 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { |
4235 | if (bss->corrupt_data & |
4236 | IEEE80211_BSS_CORRUPT_PROBE_RESP) |
4237 | corrupt_type = "beacon and probe response"; |
4238 | else |
4239 | corrupt_type = "beacon"; |
4240 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) |
4241 | corrupt_type = "probe response"; |
4242 | sdata_info(sdata, "associating with AP with corrupt %s\n", |
4243 | corrupt_type); |
4244 | } |
4245 | |
4246 | err = 0; |
4247 | goto out; |
4248 | err_clear: |
4249 | memset(ifmgd->bssid, 0, ETH_ALEN); |
4250 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); |
4251 | ifmgd->assoc_data = NULL; |
4252 | err_free: |
4253 | kfree(assoc_data); |
4254 | out: |
4255 | mutex_unlock(&ifmgd->mtx); |
4256 | |
4257 | return err; |
4258 | } |
4259 | |
4260 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
4261 | struct cfg80211_deauth_request *req) |
4262 | { |
4263 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
4264 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
4265 | bool tx = !req->local_state_change; |
4266 | bool sent_frame = false; |
4267 | |
4268 | mutex_lock(&ifmgd->mtx); |
4269 | |
4270 | sdata_info(sdata, |
4271 | "deauthenticating from %pM by local choice (reason=%d)\n", |
4272 | req->bssid, req->reason_code); |
4273 | |
4274 | if (ifmgd->auth_data) { |
4275 | drv_mgd_prepare_tx(sdata->local, sdata); |
4276 | ieee80211_send_deauth_disassoc(sdata, req->bssid, |
4277 | IEEE80211_STYPE_DEAUTH, |
4278 | req->reason_code, tx, |
4279 | frame_buf); |
4280 | ieee80211_destroy_auth_data(sdata, false); |
4281 | mutex_unlock(&ifmgd->mtx); |
4282 | |
4283 | sent_frame = tx; |
4284 | goto out; |
4285 | } |
4286 | |
4287 | if (ifmgd->associated && |
4288 | ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { |
4289 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
4290 | req->reason_code, tx, frame_buf); |
4291 | sent_frame = tx; |
4292 | } |
4293 | mutex_unlock(&ifmgd->mtx); |
4294 | |
4295 | out: |
4296 | if (sent_frame) |
4297 | __cfg80211_send_deauth(sdata->dev, frame_buf, |
4298 | IEEE80211_DEAUTH_FRAME_LEN); |
4299 | |
4300 | return 0; |
4301 | } |
4302 | |
4303 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
4304 | struct cfg80211_disassoc_request *req) |
4305 | { |
4306 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
4307 | u8 bssid[ETH_ALEN]; |
4308 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
4309 | |
4310 | mutex_lock(&ifmgd->mtx); |
4311 | |
4312 | /* |
4313 | * cfg80211 should catch this ... but it's racy since |
4314 | * we can receive a disassoc frame, process it, hand it |
4315 | * to cfg80211 while that's in a locked section already |
4316 | * trying to tell us that the user wants to disconnect. |
4317 | */ |
4318 | if (ifmgd->associated != req->bss) { |
4319 | mutex_unlock(&ifmgd->mtx); |
4320 | return -ENOLINK; |
4321 | } |
4322 | |
4323 | sdata_info(sdata, |
4324 | "disassociating from %pM by local choice (reason=%d)\n", |
4325 | req->bss->bssid, req->reason_code); |
4326 | |
4327 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
4328 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, |
4329 | req->reason_code, !req->local_state_change, |
4330 | frame_buf); |
4331 | mutex_unlock(&ifmgd->mtx); |
4332 | |
4333 | __cfg80211_send_disassoc(sdata->dev, frame_buf, |
4334 | IEEE80211_DEAUTH_FRAME_LEN); |
4335 | |
4336 | return 0; |
4337 | } |
4338 | |
4339 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) |
4340 | { |
4341 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
4342 | |
4343 | /* |
4344 | * Make sure some work items will not run after this, |
4345 | * they will not do anything but might not have been |
4346 | * cancelled when disconnecting. |
4347 | */ |
4348 | cancel_work_sync(&ifmgd->monitor_work); |
4349 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
4350 | cancel_work_sync(&ifmgd->request_smps_work); |
4351 | cancel_work_sync(&ifmgd->csa_connection_drop_work); |
4352 | cancel_work_sync(&ifmgd->chswitch_work); |
4353 | |
4354 | mutex_lock(&ifmgd->mtx); |
4355 | if (ifmgd->assoc_data) |
4356 | ieee80211_destroy_assoc_data(sdata, false); |
4357 | if (ifmgd->auth_data) |
4358 | ieee80211_destroy_auth_data(sdata, false); |
4359 | del_timer_sync(&ifmgd->timer); |
4360 | mutex_unlock(&ifmgd->mtx); |
4361 | } |
4362 | |
4363 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
4364 | enum nl80211_cqm_rssi_threshold_event rssi_event, |
4365 | gfp_t gfp) |
4366 | { |
4367 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
4368 | |
4369 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
4370 | |
4371 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
4372 | } |
4373 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |
4374 |
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