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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 | * Copyright 2013-2014 Intel Mobile Communications GmbH | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
16 | #include <linux/if_ether.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/if_arp.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <linux/pm_qos.h> | |
23 | #include <linux/crc32.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/export.h> | |
26 | #include <net/mac80211.h> | |
27 | #include <asm/unaligned.h> | |
28 | ||
29 | #include "ieee80211_i.h" | |
30 | #include "driver-ops.h" | |
31 | #include "rate.h" | |
32 | #include "led.h" | |
33 | ||
34 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
35 | #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) | |
36 | #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) | |
37 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
38 | #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) | |
39 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
40 | #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) | |
41 | #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) | |
42 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
43 | ||
44 | static int max_nullfunc_tries = 2; | |
45 | module_param(max_nullfunc_tries, int, 0644); | |
46 | MODULE_PARM_DESC(max_nullfunc_tries, | |
47 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); | |
48 | ||
49 | static int max_probe_tries = 5; | |
50 | module_param(max_probe_tries, int, 0644); | |
51 | MODULE_PARM_DESC(max_probe_tries, | |
52 | "Maximum probe tries before disconnecting (reason 4)."); | |
53 | ||
54 | /* | |
55 | * Beacon loss timeout is calculated as N frames times the | |
56 | * advertised beacon interval. This may need to be somewhat | |
57 | * higher than what hardware might detect to account for | |
58 | * delays in the host processing frames. But since we also | |
59 | * probe on beacon miss before declaring the connection lost | |
60 | * default to what we want. | |
61 | */ | |
62 | static int beacon_loss_count = 7; | |
63 | module_param(beacon_loss_count, int, 0644); | |
64 | MODULE_PARM_DESC(beacon_loss_count, | |
65 | "Number of beacon intervals before we decide beacon was lost."); | |
66 | ||
67 | /* | |
68 | * Time the connection can be idle before we probe | |
69 | * it to see if we can still talk to the AP. | |
70 | */ | |
71 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) | |
72 | /* | |
73 | * Time we wait for a probe response after sending | |
74 | * a probe request because of beacon loss or for | |
75 | * checking the connection still works. | |
76 | */ | |
77 | static int probe_wait_ms = 500; | |
78 | module_param(probe_wait_ms, int, 0644); | |
79 | MODULE_PARM_DESC(probe_wait_ms, | |
80 | "Maximum time(ms) to wait for probe response" | |
81 | " before disconnecting (reason 4)."); | |
82 | ||
83 | /* | |
84 | * Weight given to the latest Beacon frame when calculating average signal | |
85 | * strength for Beacon frames received in the current BSS. This must be | |
86 | * between 1 and 15. | |
87 | */ | |
88 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
89 | ||
90 | /* | |
91 | * How many Beacon frames need to have been used in average signal strength | |
92 | * before starting to indicate signal change events. | |
93 | */ | |
94 | #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 | |
95 | ||
96 | /* | |
97 | * We can have multiple work items (and connection probing) | |
98 | * scheduling this timer, but we need to take care to only | |
99 | * reschedule it when it should fire _earlier_ than it was | |
100 | * asked for before, or if it's not pending right now. This | |
101 | * function ensures that. Note that it then is required to | |
102 | * run this function for all timeouts after the first one | |
103 | * has happened -- the work that runs from this timer will | |
104 | * do that. | |
105 | */ | |
106 | static void run_again(struct ieee80211_sub_if_data *sdata, | |
107 | unsigned long timeout) | |
108 | { | |
109 | sdata_assert_lock(sdata); | |
110 | ||
111 | if (!timer_pending(&sdata->u.mgd.timer) || | |
112 | time_before(timeout, sdata->u.mgd.timer.expires)) | |
113 | mod_timer(&sdata->u.mgd.timer, timeout); | |
114 | } | |
115 | ||
116 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) | |
117 | { | |
118 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) | |
119 | return; | |
120 | ||
121 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
122 | return; | |
123 | ||
124 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
125 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); | |
126 | } | |
127 | ||
128 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) | |
129 | { | |
130 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
131 | ||
132 | if (unlikely(!sdata->u.mgd.associated)) | |
133 | return; | |
134 | ||
135 | ifmgd->probe_send_count = 0; | |
136 | ||
137 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
138 | return; | |
139 | ||
140 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
141 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
142 | } | |
143 | ||
144 | static int ecw2cw(int ecw) | |
145 | { | |
146 | return (1 << ecw) - 1; | |
147 | } | |
148 | ||
149 | static u32 | |
150 | ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, | |
151 | struct ieee80211_supported_band *sband, | |
152 | struct ieee80211_channel *channel, | |
153 | const struct ieee80211_ht_cap *ht_cap, | |
154 | const struct ieee80211_ht_operation *ht_oper, | |
155 | const struct ieee80211_vht_operation *vht_oper, | |
156 | struct cfg80211_chan_def *chandef, bool tracking) | |
157 | { | |
158 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
159 | struct cfg80211_chan_def vht_chandef; | |
160 | u32 ht_cfreq, ret; | |
161 | ||
162 | chandef->chan = channel; | |
163 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
164 | chandef->center_freq1 = channel->center_freq; | |
165 | chandef->center_freq2 = 0; | |
166 | ||
167 | if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) { | |
168 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
169 | goto out; | |
170 | } | |
171 | ||
172 | chandef->width = NL80211_CHAN_WIDTH_20; | |
173 | ||
174 | if (!(ht_cap->cap_info & | |
175 | cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { | |
176 | ret = IEEE80211_STA_DISABLE_40MHZ; | |
177 | vht_chandef = *chandef; | |
178 | goto out; | |
179 | } | |
180 | ||
181 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, | |
182 | channel->band); | |
183 | /* check that channel matches the right operating channel */ | |
184 | if (!tracking && channel->center_freq != ht_cfreq) { | |
185 | /* | |
186 | * It's possible that some APs are confused here; | |
187 | * Netgear WNDR3700 sometimes reports 4 higher than | |
188 | * the actual channel in association responses, but | |
189 | * since we look at probe response/beacon data here | |
190 | * it should be OK. | |
191 | */ | |
192 | sdata_info(sdata, | |
193 | "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", | |
194 | channel->center_freq, ht_cfreq, | |
195 | ht_oper->primary_chan, channel->band); | |
196 | ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; | |
197 | goto out; | |
198 | } | |
199 | ||
200 | /* check 40 MHz support, if we have it */ | |
201 | if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { | |
202 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
203 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
204 | chandef->width = NL80211_CHAN_WIDTH_40; | |
205 | chandef->center_freq1 += 10; | |
206 | break; | |
207 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
208 | chandef->width = NL80211_CHAN_WIDTH_40; | |
209 | chandef->center_freq1 -= 10; | |
210 | break; | |
211 | } | |
212 | } else { | |
213 | /* 40 MHz (and 80 MHz) must be supported for VHT */ | |
214 | ret = IEEE80211_STA_DISABLE_VHT; | |
215 | /* also mark 40 MHz disabled */ | |
216 | ret |= IEEE80211_STA_DISABLE_40MHZ; | |
217 | goto out; | |
218 | } | |
219 | ||
220 | if (!vht_oper || !sband->vht_cap.vht_supported) { | |
221 | ret = IEEE80211_STA_DISABLE_VHT; | |
222 | goto out; | |
223 | } | |
224 | ||
225 | vht_chandef.chan = channel; | |
226 | vht_chandef.center_freq1 = | |
227 | ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx, | |
228 | channel->band); | |
229 | vht_chandef.center_freq2 = 0; | |
230 | ||
231 | switch (vht_oper->chan_width) { | |
232 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
233 | vht_chandef.width = chandef->width; | |
234 | vht_chandef.center_freq1 = chandef->center_freq1; | |
235 | break; | |
236 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
237 | vht_chandef.width = NL80211_CHAN_WIDTH_80; | |
238 | break; | |
239 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
240 | vht_chandef.width = NL80211_CHAN_WIDTH_160; | |
241 | break; | |
242 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
243 | vht_chandef.width = NL80211_CHAN_WIDTH_80P80; | |
244 | vht_chandef.center_freq2 = | |
245 | ieee80211_channel_to_frequency( | |
246 | vht_oper->center_freq_seg2_idx, | |
247 | channel->band); | |
248 | break; | |
249 | default: | |
250 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) | |
251 | sdata_info(sdata, | |
252 | "AP VHT operation IE has invalid channel width (%d), disable VHT\n", | |
253 | vht_oper->chan_width); | |
254 | ret = IEEE80211_STA_DISABLE_VHT; | |
255 | goto out; | |
256 | } | |
257 | ||
258 | if (!cfg80211_chandef_valid(&vht_chandef)) { | |
259 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) | |
260 | sdata_info(sdata, | |
261 | "AP VHT information is invalid, disable VHT\n"); | |
262 | ret = IEEE80211_STA_DISABLE_VHT; | |
263 | goto out; | |
264 | } | |
265 | ||
266 | if (cfg80211_chandef_identical(chandef, &vht_chandef)) { | |
267 | ret = 0; | |
268 | goto out; | |
269 | } | |
270 | ||
271 | if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { | |
272 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) | |
273 | sdata_info(sdata, | |
274 | "AP VHT information doesn't match HT, disable VHT\n"); | |
275 | ret = IEEE80211_STA_DISABLE_VHT; | |
276 | goto out; | |
277 | } | |
278 | ||
279 | *chandef = vht_chandef; | |
280 | ||
281 | ret = 0; | |
282 | ||
283 | out: | |
284 | /* | |
285 | * When tracking the current AP, don't do any further checks if the | |
286 | * new chandef is identical to the one we're currently using for the | |
287 | * connection. This keeps us from playing ping-pong with regulatory, | |
288 | * without it the following can happen (for example): | |
289 | * - connect to an AP with 80 MHz, world regdom allows 80 MHz | |
290 | * - AP advertises regdom US | |
291 | * - CRDA loads regdom US with 80 MHz prohibited (old database) | |
292 | * - the code below detects an unsupported channel, downgrades, and | |
293 | * we disconnect from the AP in the caller | |
294 | * - disconnect causes CRDA to reload world regdomain and the game | |
295 | * starts anew. | |
296 | * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) | |
297 | * | |
298 | * It seems possible that there are still scenarios with CSA or real | |
299 | * bandwidth changes where a this could happen, but those cases are | |
300 | * less common and wouldn't completely prevent using the AP. | |
301 | */ | |
302 | if (tracking && | |
303 | cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) | |
304 | return ret; | |
305 | ||
306 | /* don't print the message below for VHT mismatch if VHT is disabled */ | |
307 | if (ret & IEEE80211_STA_DISABLE_VHT) | |
308 | vht_chandef = *chandef; | |
309 | ||
310 | /* | |
311 | * Ignore the DISABLED flag when we're already connected and only | |
312 | * tracking the APs beacon for bandwidth changes - otherwise we | |
313 | * might get disconnected here if we connect to an AP, update our | |
314 | * regulatory information based on the AP's country IE and the | |
315 | * information we have is wrong/outdated and disables the channel | |
316 | * that we're actually using for the connection to the AP. | |
317 | */ | |
318 | while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
319 | tracking ? 0 : | |
320 | IEEE80211_CHAN_DISABLED)) { | |
321 | if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { | |
322 | ret = IEEE80211_STA_DISABLE_HT | | |
323 | IEEE80211_STA_DISABLE_VHT; | |
324 | break; | |
325 | } | |
326 | ||
327 | ret |= ieee80211_chandef_downgrade(chandef); | |
328 | } | |
329 | ||
330 | if (chandef->width != vht_chandef.width && !tracking) | |
331 | sdata_info(sdata, | |
332 | "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); | |
333 | ||
334 | WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, | |
339 | struct sta_info *sta, | |
340 | const struct ieee80211_ht_cap *ht_cap, | |
341 | const struct ieee80211_ht_operation *ht_oper, | |
342 | const struct ieee80211_vht_operation *vht_oper, | |
343 | const u8 *bssid, u32 *changed) | |
344 | { | |
345 | struct ieee80211_local *local = sdata->local; | |
346 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
347 | struct ieee80211_supported_band *sband; | |
348 | struct ieee80211_channel *chan; | |
349 | struct cfg80211_chan_def chandef; | |
350 | u16 ht_opmode; | |
351 | u32 flags; | |
352 | enum ieee80211_sta_rx_bandwidth new_sta_bw; | |
353 | int ret; | |
354 | ||
355 | /* if HT was/is disabled, don't track any bandwidth changes */ | |
356 | if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) | |
357 | return 0; | |
358 | ||
359 | /* don't check VHT if we associated as non-VHT station */ | |
360 | if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) | |
361 | vht_oper = NULL; | |
362 | ||
363 | if (WARN_ON_ONCE(!sta)) | |
364 | return -EINVAL; | |
365 | ||
366 | /* | |
367 | * if bss configuration changed store the new one - | |
368 | * this may be applicable even if channel is identical | |
369 | */ | |
370 | ht_opmode = le16_to_cpu(ht_oper->operation_mode); | |
371 | if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
372 | *changed |= BSS_CHANGED_HT; | |
373 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; | |
374 | } | |
375 | ||
376 | chan = sdata->vif.bss_conf.chandef.chan; | |
377 | sband = local->hw.wiphy->bands[chan->band]; | |
378 | ||
379 | /* calculate new channel (type) based on HT/VHT operation IEs */ | |
380 | flags = ieee80211_determine_chantype(sdata, sband, chan, | |
381 | ht_cap, ht_oper, vht_oper, | |
382 | &chandef, true); | |
383 | ||
384 | /* | |
385 | * Downgrade the new channel if we associated with restricted | |
386 | * capabilities. For example, if we associated as a 20 MHz STA | |
387 | * to a 40 MHz AP (due to regulatory, capabilities or config | |
388 | * reasons) then switching to a 40 MHz channel now won't do us | |
389 | * any good -- we couldn't use it with the AP. | |
390 | */ | |
391 | if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && | |
392 | chandef.width == NL80211_CHAN_WIDTH_80P80) | |
393 | flags |= ieee80211_chandef_downgrade(&chandef); | |
394 | if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && | |
395 | chandef.width == NL80211_CHAN_WIDTH_160) | |
396 | flags |= ieee80211_chandef_downgrade(&chandef); | |
397 | if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && | |
398 | chandef.width > NL80211_CHAN_WIDTH_20) | |
399 | flags |= ieee80211_chandef_downgrade(&chandef); | |
400 | ||
401 | if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) | |
402 | return 0; | |
403 | ||
404 | sdata_info(sdata, | |
405 | "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", | |
406 | ifmgd->bssid, chandef.chan->center_freq, chandef.width, | |
407 | chandef.center_freq1, chandef.center_freq2); | |
408 | ||
409 | if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | | |
410 | IEEE80211_STA_DISABLE_VHT | | |
411 | IEEE80211_STA_DISABLE_40MHZ | | |
412 | IEEE80211_STA_DISABLE_80P80MHZ | | |
413 | IEEE80211_STA_DISABLE_160MHZ)) || | |
414 | !cfg80211_chandef_valid(&chandef)) { | |
415 | sdata_info(sdata, | |
416 | "AP %pM changed bandwidth in a way we can't support - disconnect\n", | |
417 | ifmgd->bssid); | |
418 | return -EINVAL; | |
419 | } | |
420 | ||
421 | switch (chandef.width) { | |
422 | case NL80211_CHAN_WIDTH_20_NOHT: | |
423 | case NL80211_CHAN_WIDTH_20: | |
424 | new_sta_bw = IEEE80211_STA_RX_BW_20; | |
425 | break; | |
426 | case NL80211_CHAN_WIDTH_40: | |
427 | new_sta_bw = IEEE80211_STA_RX_BW_40; | |
428 | break; | |
429 | case NL80211_CHAN_WIDTH_80: | |
430 | new_sta_bw = IEEE80211_STA_RX_BW_80; | |
431 | break; | |
432 | case NL80211_CHAN_WIDTH_80P80: | |
433 | case NL80211_CHAN_WIDTH_160: | |
434 | new_sta_bw = IEEE80211_STA_RX_BW_160; | |
435 | break; | |
436 | default: | |
437 | return -EINVAL; | |
438 | } | |
439 | ||
440 | if (new_sta_bw > sta->cur_max_bandwidth) | |
441 | new_sta_bw = sta->cur_max_bandwidth; | |
442 | ||
443 | if (new_sta_bw < sta->sta.bandwidth) { | |
444 | sta->sta.bandwidth = new_sta_bw; | |
445 | rate_control_rate_update(local, sband, sta, | |
446 | IEEE80211_RC_BW_CHANGED); | |
447 | } | |
448 | ||
449 | ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); | |
450 | if (ret) { | |
451 | sdata_info(sdata, | |
452 | "AP %pM changed bandwidth to incompatible one - disconnect\n", | |
453 | ifmgd->bssid); | |
454 | return ret; | |
455 | } | |
456 | ||
457 | if (new_sta_bw > sta->sta.bandwidth) { | |
458 | sta->sta.bandwidth = new_sta_bw; | |
459 | rate_control_rate_update(local, sband, sta, | |
460 | IEEE80211_RC_BW_CHANGED); | |
461 | } | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | /* frame sending functions */ | |
467 | ||
468 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, | |
469 | struct sk_buff *skb, u8 ap_ht_param, | |
470 | struct ieee80211_supported_band *sband, | |
471 | struct ieee80211_channel *channel, | |
472 | enum ieee80211_smps_mode smps) | |
473 | { | |
474 | u8 *pos; | |
475 | u32 flags = channel->flags; | |
476 | u16 cap; | |
477 | struct ieee80211_sta_ht_cap ht_cap; | |
478 | ||
479 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); | |
480 | ||
481 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
482 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
483 | ||
484 | /* determine capability flags */ | |
485 | cap = ht_cap.cap; | |
486 | ||
487 | switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
488 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
489 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
490 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
491 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
492 | } | |
493 | break; | |
494 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
495 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
496 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
497 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
498 | } | |
499 | break; | |
500 | } | |
501 | ||
502 | /* | |
503 | * If 40 MHz was disabled associate as though we weren't | |
504 | * capable of 40 MHz -- some broken APs will never fall | |
505 | * back to trying to transmit in 20 MHz. | |
506 | */ | |
507 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { | |
508 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
509 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
510 | } | |
511 | ||
512 | /* set SM PS mode properly */ | |
513 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
514 | switch (smps) { | |
515 | case IEEE80211_SMPS_AUTOMATIC: | |
516 | case IEEE80211_SMPS_NUM_MODES: | |
517 | WARN_ON(1); | |
518 | case IEEE80211_SMPS_OFF: | |
519 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
520 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
521 | break; | |
522 | case IEEE80211_SMPS_STATIC: | |
523 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
524 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
525 | break; | |
526 | case IEEE80211_SMPS_DYNAMIC: | |
527 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
528 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
529 | break; | |
530 | } | |
531 | ||
532 | /* reserve and fill IE */ | |
533 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
534 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); | |
535 | } | |
536 | ||
537 | static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, | |
538 | struct sk_buff *skb, | |
539 | struct ieee80211_supported_band *sband, | |
540 | struct ieee80211_vht_cap *ap_vht_cap) | |
541 | { | |
542 | u8 *pos; | |
543 | u32 cap; | |
544 | struct ieee80211_sta_vht_cap vht_cap; | |
545 | u32 mask, ap_bf_sts, our_bf_sts; | |
546 | ||
547 | BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); | |
548 | ||
549 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
550 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); | |
551 | ||
552 | /* determine capability flags */ | |
553 | cap = vht_cap.cap; | |
554 | ||
555 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { | |
556 | u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
557 | ||
558 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
559 | if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || | |
560 | bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
561 | cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; | |
562 | } | |
563 | ||
564 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { | |
565 | cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; | |
566 | cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Some APs apparently get confused if our capabilities are better | |
571 | * than theirs, so restrict what we advertise in the assoc request. | |
572 | */ | |
573 | if (!(ap_vht_cap->vht_cap_info & | |
574 | cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) | |
575 | cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; | |
576 | ||
577 | mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; | |
578 | ||
579 | ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; | |
580 | our_bf_sts = cap & mask; | |
581 | ||
582 | if (ap_bf_sts < our_bf_sts) { | |
583 | cap &= ~mask; | |
584 | cap |= ap_bf_sts; | |
585 | } | |
586 | ||
587 | /* reserve and fill IE */ | |
588 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
589 | ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); | |
590 | } | |
591 | ||
592 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
593 | { | |
594 | struct ieee80211_local *local = sdata->local; | |
595 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
596 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
597 | struct sk_buff *skb; | |
598 | struct ieee80211_mgmt *mgmt; | |
599 | u8 *pos, qos_info; | |
600 | size_t offset = 0, noffset; | |
601 | int i, count, rates_len, supp_rates_len, shift; | |
602 | u16 capab; | |
603 | struct ieee80211_supported_band *sband; | |
604 | struct ieee80211_chanctx_conf *chanctx_conf; | |
605 | struct ieee80211_channel *chan; | |
606 | u32 rate_flags, rates = 0; | |
607 | ||
608 | sdata_assert_lock(sdata); | |
609 | ||
610 | rcu_read_lock(); | |
611 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
612 | if (WARN_ON(!chanctx_conf)) { | |
613 | rcu_read_unlock(); | |
614 | return; | |
615 | } | |
616 | chan = chanctx_conf->def.chan; | |
617 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
618 | rcu_read_unlock(); | |
619 | sband = local->hw.wiphy->bands[chan->band]; | |
620 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
621 | ||
622 | if (assoc_data->supp_rates_len) { | |
623 | /* | |
624 | * Get all rates supported by the device and the AP as | |
625 | * some APs don't like getting a superset of their rates | |
626 | * in the association request (e.g. D-Link DAP 1353 in | |
627 | * b-only mode)... | |
628 | */ | |
629 | rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, | |
630 | assoc_data->supp_rates, | |
631 | assoc_data->supp_rates_len, | |
632 | &rates); | |
633 | } else { | |
634 | /* | |
635 | * In case AP not provide any supported rates information | |
636 | * before association, we send information element(s) with | |
637 | * all rates that we support. | |
638 | */ | |
639 | rates_len = 0; | |
640 | for (i = 0; i < sband->n_bitrates; i++) { | |
641 | if ((rate_flags & sband->bitrates[i].flags) | |
642 | != rate_flags) | |
643 | continue; | |
644 | rates |= BIT(i); | |
645 | rates_len++; | |
646 | } | |
647 | } | |
648 | ||
649 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
650 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
651 | 2 + assoc_data->ssid_len + /* SSID */ | |
652 | 4 + rates_len + /* (extended) rates */ | |
653 | 4 + /* power capability */ | |
654 | 2 + 2 * sband->n_channels + /* supported channels */ | |
655 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
656 | 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ | |
657 | assoc_data->ie_len + /* extra IEs */ | |
658 | 9, /* WMM */ | |
659 | GFP_KERNEL); | |
660 | if (!skb) | |
661 | return; | |
662 | ||
663 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
664 | ||
665 | capab = WLAN_CAPABILITY_ESS; | |
666 | ||
667 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
668 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
669 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
670 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
671 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
672 | } | |
673 | ||
674 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) | |
675 | capab |= WLAN_CAPABILITY_PRIVACY; | |
676 | ||
677 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
678 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
679 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
680 | ||
681 | if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) | |
682 | capab |= WLAN_CAPABILITY_RADIO_MEASURE; | |
683 | ||
684 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
685 | memset(mgmt, 0, 24); | |
686 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); | |
687 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
688 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); | |
689 | ||
690 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { | |
691 | skb_put(skb, 10); | |
692 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
693 | IEEE80211_STYPE_REASSOC_REQ); | |
694 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
695 | mgmt->u.reassoc_req.listen_interval = | |
696 | cpu_to_le16(local->hw.conf.listen_interval); | |
697 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, | |
698 | ETH_ALEN); | |
699 | } else { | |
700 | skb_put(skb, 4); | |
701 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
702 | IEEE80211_STYPE_ASSOC_REQ); | |
703 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
704 | mgmt->u.assoc_req.listen_interval = | |
705 | cpu_to_le16(local->hw.conf.listen_interval); | |
706 | } | |
707 | ||
708 | /* SSID */ | |
709 | pos = skb_put(skb, 2 + assoc_data->ssid_len); | |
710 | *pos++ = WLAN_EID_SSID; | |
711 | *pos++ = assoc_data->ssid_len; | |
712 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); | |
713 | ||
714 | /* add all rates which were marked to be used above */ | |
715 | supp_rates_len = rates_len; | |
716 | if (supp_rates_len > 8) | |
717 | supp_rates_len = 8; | |
718 | ||
719 | pos = skb_put(skb, supp_rates_len + 2); | |
720 | *pos++ = WLAN_EID_SUPP_RATES; | |
721 | *pos++ = supp_rates_len; | |
722 | ||
723 | count = 0; | |
724 | for (i = 0; i < sband->n_bitrates; i++) { | |
725 | if (BIT(i) & rates) { | |
726 | int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, | |
727 | 5 * (1 << shift)); | |
728 | *pos++ = (u8) rate; | |
729 | if (++count == 8) | |
730 | break; | |
731 | } | |
732 | } | |
733 | ||
734 | if (rates_len > count) { | |
735 | pos = skb_put(skb, rates_len - count + 2); | |
736 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
737 | *pos++ = rates_len - count; | |
738 | ||
739 | for (i++; i < sband->n_bitrates; i++) { | |
740 | if (BIT(i) & rates) { | |
741 | int rate; | |
742 | rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, | |
743 | 5 * (1 << shift)); | |
744 | *pos++ = (u8) rate; | |
745 | } | |
746 | } | |
747 | } | |
748 | ||
749 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || | |
750 | capab & WLAN_CAPABILITY_RADIO_MEASURE) { | |
751 | pos = skb_put(skb, 4); | |
752 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
753 | *pos++ = 2; | |
754 | *pos++ = 0; /* min tx power */ | |
755 | /* max tx power */ | |
756 | *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); | |
757 | } | |
758 | ||
759 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
760 | /* TODO: get this in reg domain format */ | |
761 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
762 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
763 | *pos++ = 2 * sband->n_channels; | |
764 | for (i = 0; i < sband->n_channels; i++) { | |
765 | *pos++ = ieee80211_frequency_to_channel( | |
766 | sband->channels[i].center_freq); | |
767 | *pos++ = 1; /* one channel in the subband*/ | |
768 | } | |
769 | } | |
770 | ||
771 | /* if present, add any custom IEs that go before HT */ | |
772 | if (assoc_data->ie_len) { | |
773 | static const u8 before_ht[] = { | |
774 | WLAN_EID_SSID, | |
775 | WLAN_EID_SUPP_RATES, | |
776 | WLAN_EID_EXT_SUPP_RATES, | |
777 | WLAN_EID_PWR_CAPABILITY, | |
778 | WLAN_EID_SUPPORTED_CHANNELS, | |
779 | WLAN_EID_RSN, | |
780 | WLAN_EID_QOS_CAPA, | |
781 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
782 | WLAN_EID_MOBILITY_DOMAIN, | |
783 | WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ | |
784 | WLAN_EID_RIC_DATA, /* reassoc only */ | |
785 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
786 | }; | |
787 | static const u8 after_ric[] = { | |
788 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
789 | WLAN_EID_HT_CAPABILITY, | |
790 | WLAN_EID_BSS_COEX_2040, | |
791 | WLAN_EID_EXT_CAPABILITY, | |
792 | WLAN_EID_QOS_TRAFFIC_CAPA, | |
793 | WLAN_EID_TIM_BCAST_REQ, | |
794 | WLAN_EID_INTERWORKING, | |
795 | /* 60GHz doesn't happen right now */ | |
796 | WLAN_EID_VHT_CAPABILITY, | |
797 | WLAN_EID_OPMODE_NOTIF, | |
798 | }; | |
799 | ||
800 | noffset = ieee80211_ie_split_ric(assoc_data->ie, | |
801 | assoc_data->ie_len, | |
802 | before_ht, | |
803 | ARRAY_SIZE(before_ht), | |
804 | after_ric, | |
805 | ARRAY_SIZE(after_ric), | |
806 | offset); | |
807 | pos = skb_put(skb, noffset - offset); | |
808 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
809 | offset = noffset; | |
810 | } | |
811 | ||
812 | if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && | |
813 | !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) | |
814 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
815 | ||
816 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) | |
817 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, | |
818 | sband, chan, sdata->smps_mode); | |
819 | ||
820 | /* if present, add any custom IEs that go before VHT */ | |
821 | if (assoc_data->ie_len) { | |
822 | static const u8 before_vht[] = { | |
823 | WLAN_EID_SSID, | |
824 | WLAN_EID_SUPP_RATES, | |
825 | WLAN_EID_EXT_SUPP_RATES, | |
826 | WLAN_EID_PWR_CAPABILITY, | |
827 | WLAN_EID_SUPPORTED_CHANNELS, | |
828 | WLAN_EID_RSN, | |
829 | WLAN_EID_QOS_CAPA, | |
830 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
831 | WLAN_EID_MOBILITY_DOMAIN, | |
832 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
833 | WLAN_EID_HT_CAPABILITY, | |
834 | WLAN_EID_BSS_COEX_2040, | |
835 | WLAN_EID_EXT_CAPABILITY, | |
836 | WLAN_EID_QOS_TRAFFIC_CAPA, | |
837 | WLAN_EID_TIM_BCAST_REQ, | |
838 | WLAN_EID_INTERWORKING, | |
839 | }; | |
840 | ||
841 | /* RIC already taken above, so no need to handle here anymore */ | |
842 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, | |
843 | before_vht, ARRAY_SIZE(before_vht), | |
844 | offset); | |
845 | pos = skb_put(skb, noffset - offset); | |
846 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
847 | offset = noffset; | |
848 | } | |
849 | ||
850 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) | |
851 | ieee80211_add_vht_ie(sdata, skb, sband, | |
852 | &assoc_data->ap_vht_cap); | |
853 | ||
854 | /* if present, add any custom non-vendor IEs that go after HT */ | |
855 | if (assoc_data->ie_len) { | |
856 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, | |
857 | assoc_data->ie_len, | |
858 | offset); | |
859 | pos = skb_put(skb, noffset - offset); | |
860 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
861 | offset = noffset; | |
862 | } | |
863 | ||
864 | if (assoc_data->wmm) { | |
865 | if (assoc_data->uapsd) { | |
866 | qos_info = ifmgd->uapsd_queues; | |
867 | qos_info |= (ifmgd->uapsd_max_sp_len << | |
868 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); | |
869 | } else { | |
870 | qos_info = 0; | |
871 | } | |
872 | ||
873 | pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); | |
874 | } | |
875 | ||
876 | /* add any remaining custom (i.e. vendor specific here) IEs */ | |
877 | if (assoc_data->ie_len) { | |
878 | noffset = assoc_data->ie_len; | |
879 | pos = skb_put(skb, noffset - offset); | |
880 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
881 | } | |
882 | ||
883 | drv_mgd_prepare_tx(local, sdata); | |
884 | ||
885 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
886 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) | |
887 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
888 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
889 | ieee80211_tx_skb(sdata, skb); | |
890 | } | |
891 | ||
892 | void ieee80211_send_pspoll(struct ieee80211_local *local, | |
893 | struct ieee80211_sub_if_data *sdata) | |
894 | { | |
895 | struct ieee80211_pspoll *pspoll; | |
896 | struct sk_buff *skb; | |
897 | ||
898 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); | |
899 | if (!skb) | |
900 | return; | |
901 | ||
902 | pspoll = (struct ieee80211_pspoll *) skb->data; | |
903 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
904 | ||
905 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
906 | ieee80211_tx_skb(sdata, skb); | |
907 | } | |
908 | ||
909 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
910 | struct ieee80211_sub_if_data *sdata, | |
911 | int powersave) | |
912 | { | |
913 | struct sk_buff *skb; | |
914 | struct ieee80211_hdr_3addr *nullfunc; | |
915 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
916 | ||
917 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); | |
918 | if (!skb) | |
919 | return; | |
920 | ||
921 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; | |
922 | if (powersave) | |
923 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
924 | ||
925 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
926 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; | |
927 | ||
928 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) | |
929 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
930 | ||
931 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) | |
932 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; | |
933 | ||
934 | ieee80211_tx_skb(sdata, skb); | |
935 | } | |
936 | ||
937 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, | |
938 | struct ieee80211_sub_if_data *sdata) | |
939 | { | |
940 | struct sk_buff *skb; | |
941 | struct ieee80211_hdr *nullfunc; | |
942 | __le16 fc; | |
943 | ||
944 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
945 | return; | |
946 | ||
947 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
948 | if (!skb) | |
949 | return; | |
950 | ||
951 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
952 | ||
953 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
954 | memset(nullfunc, 0, 30); | |
955 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
956 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
957 | nullfunc->frame_control = fc; | |
958 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
959 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
960 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
961 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
962 | ||
963 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
964 | ieee80211_tx_skb(sdata, skb); | |
965 | } | |
966 | ||
967 | /* spectrum management related things */ | |
968 | static void ieee80211_chswitch_work(struct work_struct *work) | |
969 | { | |
970 | struct ieee80211_sub_if_data *sdata = | |
971 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
972 | struct ieee80211_local *local = sdata->local; | |
973 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
974 | int ret; | |
975 | ||
976 | if (!ieee80211_sdata_running(sdata)) | |
977 | return; | |
978 | ||
979 | sdata_lock(sdata); | |
980 | mutex_lock(&local->mtx); | |
981 | mutex_lock(&local->chanctx_mtx); | |
982 | ||
983 | if (!ifmgd->associated) | |
984 | goto out; | |
985 | ||
986 | if (!sdata->vif.csa_active) | |
987 | goto out; | |
988 | ||
989 | /* | |
990 | * using reservation isn't immediate as it may be deferred until later | |
991 | * with multi-vif. once reservation is complete it will re-schedule the | |
992 | * work with no reserved_chanctx so verify chandef to check if it | |
993 | * completed successfully | |
994 | */ | |
995 | ||
996 | if (sdata->reserved_chanctx) { | |
997 | /* | |
998 | * with multi-vif csa driver may call ieee80211_csa_finish() | |
999 | * many times while waiting for other interfaces to use their | |
1000 | * reservations | |
1001 | */ | |
1002 | if (sdata->reserved_ready) | |
1003 | goto out; | |
1004 | ||
1005 | ret = ieee80211_vif_use_reserved_context(sdata); | |
1006 | if (ret) { | |
1007 | sdata_info(sdata, | |
1008 | "failed to use reserved channel context, disconnecting (err=%d)\n", | |
1009 | ret); | |
1010 | ieee80211_queue_work(&sdata->local->hw, | |
1011 | &ifmgd->csa_connection_drop_work); | |
1012 | goto out; | |
1013 | } | |
1014 | ||
1015 | goto out; | |
1016 | } | |
1017 | ||
1018 | if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, | |
1019 | &sdata->csa_chandef)) { | |
1020 | sdata_info(sdata, | |
1021 | "failed to finalize channel switch, disconnecting\n"); | |
1022 | ieee80211_queue_work(&sdata->local->hw, | |
1023 | &ifmgd->csa_connection_drop_work); | |
1024 | goto out; | |
1025 | } | |
1026 | ||
1027 | /* XXX: shouldn't really modify cfg80211-owned data! */ | |
1028 | ifmgd->associated->channel = sdata->csa_chandef.chan; | |
1029 | ||
1030 | ifmgd->csa_waiting_bcn = true; | |
1031 | ||
1032 | ieee80211_sta_reset_beacon_monitor(sdata); | |
1033 | ieee80211_sta_reset_conn_monitor(sdata); | |
1034 | ||
1035 | out: | |
1036 | mutex_unlock(&local->chanctx_mtx); | |
1037 | mutex_unlock(&local->mtx); | |
1038 | sdata_unlock(sdata); | |
1039 | } | |
1040 | ||
1041 | static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) | |
1042 | { | |
1043 | struct ieee80211_local *local = sdata->local; | |
1044 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1045 | int ret; | |
1046 | ||
1047 | sdata_assert_lock(sdata); | |
1048 | ||
1049 | WARN_ON(!sdata->vif.csa_active); | |
1050 | ||
1051 | if (sdata->csa_block_tx) { | |
1052 | ieee80211_wake_vif_queues(local, sdata, | |
1053 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
1054 | sdata->csa_block_tx = false; | |
1055 | } | |
1056 | ||
1057 | cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); | |
1058 | ||
1059 | sdata->vif.csa_active = false; | |
1060 | ifmgd->csa_waiting_bcn = false; | |
1061 | ||
1062 | ret = drv_post_channel_switch(sdata); | |
1063 | if (ret) { | |
1064 | sdata_info(sdata, | |
1065 | "driver post channel switch failed, disconnecting\n"); | |
1066 | ieee80211_queue_work(&local->hw, | |
1067 | &ifmgd->csa_connection_drop_work); | |
1068 | return; | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) | |
1073 | { | |
1074 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1075 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1076 | ||
1077 | trace_api_chswitch_done(sdata, success); | |
1078 | if (!success) { | |
1079 | sdata_info(sdata, | |
1080 | "driver channel switch failed, disconnecting\n"); | |
1081 | ieee80211_queue_work(&sdata->local->hw, | |
1082 | &ifmgd->csa_connection_drop_work); | |
1083 | } else { | |
1084 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
1085 | } | |
1086 | } | |
1087 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
1088 | ||
1089 | static void ieee80211_chswitch_timer(unsigned long data) | |
1090 | { | |
1091 | struct ieee80211_sub_if_data *sdata = | |
1092 | (struct ieee80211_sub_if_data *) data; | |
1093 | ||
1094 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); | |
1095 | } | |
1096 | ||
1097 | static void | |
1098 | ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
1099 | u64 timestamp, u32 device_timestamp, | |
1100 | struct ieee802_11_elems *elems, | |
1101 | bool beacon) | |
1102 | { | |
1103 | struct ieee80211_local *local = sdata->local; | |
1104 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1105 | struct cfg80211_bss *cbss = ifmgd->associated; | |
1106 | struct ieee80211_chanctx_conf *conf; | |
1107 | struct ieee80211_chanctx *chanctx; | |
1108 | enum ieee80211_band current_band; | |
1109 | struct ieee80211_csa_ie csa_ie; | |
1110 | struct ieee80211_channel_switch ch_switch; | |
1111 | int res; | |
1112 | ||
1113 | sdata_assert_lock(sdata); | |
1114 | ||
1115 | if (!cbss) | |
1116 | return; | |
1117 | ||
1118 | if (local->scanning) | |
1119 | return; | |
1120 | ||
1121 | /* disregard subsequent announcements if we are already processing */ | |
1122 | if (sdata->vif.csa_active) | |
1123 | return; | |
1124 | ||
1125 | current_band = cbss->channel->band; | |
1126 | memset(&csa_ie, 0, sizeof(csa_ie)); | |
1127 | res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, | |
1128 | ifmgd->flags, | |
1129 | ifmgd->associated->bssid, &csa_ie); | |
1130 | if (res < 0) | |
1131 | ieee80211_queue_work(&local->hw, | |
1132 | &ifmgd->csa_connection_drop_work); | |
1133 | if (res) | |
1134 | return; | |
1135 | ||
1136 | if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, | |
1137 | IEEE80211_CHAN_DISABLED)) { | |
1138 | sdata_info(sdata, | |
1139 | "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
1140 | ifmgd->associated->bssid, | |
1141 | csa_ie.chandef.chan->center_freq, | |
1142 | csa_ie.chandef.width, csa_ie.chandef.center_freq1, | |
1143 | csa_ie.chandef.center_freq2); | |
1144 | ieee80211_queue_work(&local->hw, | |
1145 | &ifmgd->csa_connection_drop_work); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | mutex_lock(&local->mtx); | |
1150 | mutex_lock(&local->chanctx_mtx); | |
1151 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1152 | lockdep_is_held(&local->chanctx_mtx)); | |
1153 | if (!conf) { | |
1154 | sdata_info(sdata, | |
1155 | "no channel context assigned to vif?, disconnecting\n"); | |
1156 | ieee80211_queue_work(&local->hw, | |
1157 | &ifmgd->csa_connection_drop_work); | |
1158 | mutex_unlock(&local->chanctx_mtx); | |
1159 | mutex_unlock(&local->mtx); | |
1160 | return; | |
1161 | } | |
1162 | ||
1163 | chanctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1164 | ||
1165 | if (local->use_chanctx && | |
1166 | !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { | |
1167 | sdata_info(sdata, | |
1168 | "driver doesn't support chan-switch with channel contexts\n"); | |
1169 | ieee80211_queue_work(&local->hw, | |
1170 | &ifmgd->csa_connection_drop_work); | |
1171 | mutex_unlock(&local->chanctx_mtx); | |
1172 | mutex_unlock(&local->mtx); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | ch_switch.timestamp = timestamp; | |
1177 | ch_switch.device_timestamp = device_timestamp; | |
1178 | ch_switch.block_tx = csa_ie.mode; | |
1179 | ch_switch.chandef = csa_ie.chandef; | |
1180 | ch_switch.count = csa_ie.count; | |
1181 | ||
1182 | if (drv_pre_channel_switch(sdata, &ch_switch)) { | |
1183 | sdata_info(sdata, | |
1184 | "preparing for channel switch failed, disconnecting\n"); | |
1185 | ieee80211_queue_work(&local->hw, | |
1186 | &ifmgd->csa_connection_drop_work); | |
1187 | mutex_unlock(&local->chanctx_mtx); | |
1188 | mutex_unlock(&local->mtx); | |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, | |
1193 | chanctx->mode, false); | |
1194 | if (res) { | |
1195 | sdata_info(sdata, | |
1196 | "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", | |
1197 | res); | |
1198 | ieee80211_queue_work(&local->hw, | |
1199 | &ifmgd->csa_connection_drop_work); | |
1200 | mutex_unlock(&local->chanctx_mtx); | |
1201 | mutex_unlock(&local->mtx); | |
1202 | return; | |
1203 | } | |
1204 | mutex_unlock(&local->chanctx_mtx); | |
1205 | ||
1206 | sdata->vif.csa_active = true; | |
1207 | sdata->csa_chandef = csa_ie.chandef; | |
1208 | sdata->csa_block_tx = csa_ie.mode; | |
1209 | ||
1210 | if (sdata->csa_block_tx) | |
1211 | ieee80211_stop_vif_queues(local, sdata, | |
1212 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
1213 | mutex_unlock(&local->mtx); | |
1214 | ||
1215 | cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, | |
1216 | csa_ie.count); | |
1217 | ||
1218 | if (local->ops->channel_switch) { | |
1219 | /* use driver's channel switch callback */ | |
1220 | drv_channel_switch(local, sdata, &ch_switch); | |
1221 | return; | |
1222 | } | |
1223 | ||
1224 | /* channel switch handled in software */ | |
1225 | if (csa_ie.count <= 1) | |
1226 | ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); | |
1227 | else | |
1228 | mod_timer(&ifmgd->chswitch_timer, | |
1229 | TU_TO_EXP_TIME((csa_ie.count - 1) * | |
1230 | cbss->beacon_interval)); | |
1231 | } | |
1232 | ||
1233 | static bool | |
1234 | ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
1235 | struct ieee80211_channel *channel, | |
1236 | const u8 *country_ie, u8 country_ie_len, | |
1237 | const u8 *pwr_constr_elem, | |
1238 | int *chan_pwr, int *pwr_reduction) | |
1239 | { | |
1240 | struct ieee80211_country_ie_triplet *triplet; | |
1241 | int chan = ieee80211_frequency_to_channel(channel->center_freq); | |
1242 | int i, chan_increment; | |
1243 | bool have_chan_pwr = false; | |
1244 | ||
1245 | /* Invalid IE */ | |
1246 | if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1247 | return false; | |
1248 | ||
1249 | triplet = (void *)(country_ie + 3); | |
1250 | country_ie_len -= 3; | |
1251 | ||
1252 | switch (channel->band) { | |
1253 | default: | |
1254 | WARN_ON_ONCE(1); | |
1255 | /* fall through */ | |
1256 | case IEEE80211_BAND_2GHZ: | |
1257 | case IEEE80211_BAND_60GHZ: | |
1258 | chan_increment = 1; | |
1259 | break; | |
1260 | case IEEE80211_BAND_5GHZ: | |
1261 | chan_increment = 4; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | /* find channel */ | |
1266 | while (country_ie_len >= 3) { | |
1267 | u8 first_channel = triplet->chans.first_channel; | |
1268 | ||
1269 | if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) | |
1270 | goto next; | |
1271 | ||
1272 | for (i = 0; i < triplet->chans.num_channels; i++) { | |
1273 | if (first_channel + i * chan_increment == chan) { | |
1274 | have_chan_pwr = true; | |
1275 | *chan_pwr = triplet->chans.max_power; | |
1276 | break; | |
1277 | } | |
1278 | } | |
1279 | if (have_chan_pwr) | |
1280 | break; | |
1281 | ||
1282 | next: | |
1283 | triplet++; | |
1284 | country_ie_len -= 3; | |
1285 | } | |
1286 | ||
1287 | if (have_chan_pwr) | |
1288 | *pwr_reduction = *pwr_constr_elem; | |
1289 | return have_chan_pwr; | |
1290 | } | |
1291 | ||
1292 | static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, | |
1293 | struct ieee80211_channel *channel, | |
1294 | const u8 *cisco_dtpc_ie, | |
1295 | int *pwr_level) | |
1296 | { | |
1297 | /* From practical testing, the first data byte of the DTPC element | |
1298 | * seems to contain the requested dBm level, and the CLI on Cisco | |
1299 | * APs clearly state the range is -127 to 127 dBm, which indicates | |
1300 | * a signed byte, although it seemingly never actually goes negative. | |
1301 | * The other byte seems to always be zero. | |
1302 | */ | |
1303 | *pwr_level = (__s8)cisco_dtpc_ie[4]; | |
1304 | } | |
1305 | ||
1306 | static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
1307 | struct ieee80211_channel *channel, | |
1308 | struct ieee80211_mgmt *mgmt, | |
1309 | const u8 *country_ie, u8 country_ie_len, | |
1310 | const u8 *pwr_constr_ie, | |
1311 | const u8 *cisco_dtpc_ie) | |
1312 | { | |
1313 | bool has_80211h_pwr = false, has_cisco_pwr = false; | |
1314 | int chan_pwr = 0, pwr_reduction_80211h = 0; | |
1315 | int pwr_level_cisco, pwr_level_80211h; | |
1316 | int new_ap_level; | |
1317 | ||
1318 | if (country_ie && pwr_constr_ie && | |
1319 | mgmt->u.probe_resp.capab_info & | |
1320 | cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) { | |
1321 | has_80211h_pwr = ieee80211_find_80211h_pwr_constr( | |
1322 | sdata, channel, country_ie, country_ie_len, | |
1323 | pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); | |
1324 | pwr_level_80211h = | |
1325 | max_t(int, 0, chan_pwr - pwr_reduction_80211h); | |
1326 | } | |
1327 | ||
1328 | if (cisco_dtpc_ie) { | |
1329 | ieee80211_find_cisco_dtpc( | |
1330 | sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); | |
1331 | has_cisco_pwr = true; | |
1332 | } | |
1333 | ||
1334 | if (!has_80211h_pwr && !has_cisco_pwr) | |
1335 | return 0; | |
1336 | ||
1337 | /* If we have both 802.11h and Cisco DTPC, apply both limits | |
1338 | * by picking the smallest of the two power levels advertised. | |
1339 | */ | |
1340 | if (has_80211h_pwr && | |
1341 | (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { | |
1342 | sdata_info(sdata, | |
1343 | "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", | |
1344 | pwr_level_80211h, chan_pwr, pwr_reduction_80211h, | |
1345 | sdata->u.mgd.bssid); | |
1346 | new_ap_level = pwr_level_80211h; | |
1347 | } else { /* has_cisco_pwr is always true here. */ | |
1348 | sdata_info(sdata, | |
1349 | "Limiting TX power to %d dBm as advertised by %pM\n", | |
1350 | pwr_level_cisco, sdata->u.mgd.bssid); | |
1351 | new_ap_level = pwr_level_cisco; | |
1352 | } | |
1353 | ||
1354 | if (sdata->ap_power_level == new_ap_level) | |
1355 | return 0; | |
1356 | ||
1357 | sdata->ap_power_level = new_ap_level; | |
1358 | if (__ieee80211_recalc_txpower(sdata)) | |
1359 | return BSS_CHANGED_TXPOWER; | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | /* powersave */ | |
1364 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
1365 | struct ieee80211_sub_if_data *sdata) | |
1366 | { | |
1367 | struct ieee80211_conf *conf = &local->hw.conf; | |
1368 | ||
1369 | /* | |
1370 | * If we are scanning right now then the parameters will | |
1371 | * take effect when scan finishes. | |
1372 | */ | |
1373 | if (local->scanning) | |
1374 | return; | |
1375 | ||
1376 | if (conf->dynamic_ps_timeout > 0 && | |
1377 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
1378 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1379 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
1380 | } else { | |
1381 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
1382 | ieee80211_send_nullfunc(local, sdata, 1); | |
1383 | ||
1384 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && | |
1385 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
1386 | return; | |
1387 | ||
1388 | conf->flags |= IEEE80211_CONF_PS; | |
1389 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1390 | } | |
1391 | } | |
1392 | ||
1393 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
1394 | { | |
1395 | struct ieee80211_conf *conf = &local->hw.conf; | |
1396 | ||
1397 | if (local->ps_sdata) { | |
1398 | ieee80211_enable_ps(local, local->ps_sdata); | |
1399 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
1400 | conf->flags &= ~IEEE80211_CONF_PS; | |
1401 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1402 | del_timer_sync(&local->dynamic_ps_timer); | |
1403 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) | |
1408 | { | |
1409 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; | |
1410 | struct sta_info *sta = NULL; | |
1411 | bool authorized = false; | |
1412 | ||
1413 | if (!mgd->powersave) | |
1414 | return false; | |
1415 | ||
1416 | if (mgd->broken_ap) | |
1417 | return false; | |
1418 | ||
1419 | if (!mgd->associated) | |
1420 | return false; | |
1421 | ||
1422 | if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) | |
1423 | return false; | |
1424 | ||
1425 | if (!mgd->have_beacon) | |
1426 | return false; | |
1427 | ||
1428 | rcu_read_lock(); | |
1429 | sta = sta_info_get(sdata, mgd->bssid); | |
1430 | if (sta) | |
1431 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
1432 | rcu_read_unlock(); | |
1433 | ||
1434 | return authorized; | |
1435 | } | |
1436 | ||
1437 | /* need to hold RTNL or interface lock */ | |
1438 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) | |
1439 | { | |
1440 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
1441 | int count = 0; | |
1442 | int timeout; | |
1443 | ||
1444 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
1445 | local->ps_sdata = NULL; | |
1446 | return; | |
1447 | } | |
1448 | ||
1449 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1450 | if (!ieee80211_sdata_running(sdata)) | |
1451 | continue; | |
1452 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
1453 | /* If an AP vif is found, then disable PS | |
1454 | * by setting the count to zero thereby setting | |
1455 | * ps_sdata to NULL. | |
1456 | */ | |
1457 | count = 0; | |
1458 | break; | |
1459 | } | |
1460 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1461 | continue; | |
1462 | found = sdata; | |
1463 | count++; | |
1464 | } | |
1465 | ||
1466 | if (count == 1 && ieee80211_powersave_allowed(found)) { | |
1467 | s32 beaconint_us; | |
1468 | ||
1469 | if (latency < 0) | |
1470 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); | |
1471 | ||
1472 | beaconint_us = ieee80211_tu_to_usec( | |
1473 | found->vif.bss_conf.beacon_int); | |
1474 | ||
1475 | timeout = local->dynamic_ps_forced_timeout; | |
1476 | if (timeout < 0) { | |
1477 | /* | |
1478 | * Go to full PSM if the user configures a very low | |
1479 | * latency requirement. | |
1480 | * The 2000 second value is there for compatibility | |
1481 | * until the PM_QOS_NETWORK_LATENCY is configured | |
1482 | * with real values. | |
1483 | */ | |
1484 | if (latency > (1900 * USEC_PER_MSEC) && | |
1485 | latency != (2000 * USEC_PER_SEC)) | |
1486 | timeout = 0; | |
1487 | else | |
1488 | timeout = 100; | |
1489 | } | |
1490 | local->hw.conf.dynamic_ps_timeout = timeout; | |
1491 | ||
1492 | if (beaconint_us > latency) { | |
1493 | local->ps_sdata = NULL; | |
1494 | } else { | |
1495 | int maxslp = 1; | |
1496 | u8 dtimper = found->u.mgd.dtim_period; | |
1497 | ||
1498 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
1499 | if (!dtimper) | |
1500 | dtimper = 1; | |
1501 | else if (dtimper > 1) | |
1502 | maxslp = min_t(int, dtimper, | |
1503 | latency / beaconint_us); | |
1504 | ||
1505 | local->hw.conf.max_sleep_period = maxslp; | |
1506 | local->hw.conf.ps_dtim_period = dtimper; | |
1507 | local->ps_sdata = found; | |
1508 | } | |
1509 | } else { | |
1510 | local->ps_sdata = NULL; | |
1511 | } | |
1512 | ||
1513 | ieee80211_change_ps(local); | |
1514 | } | |
1515 | ||
1516 | void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) | |
1517 | { | |
1518 | bool ps_allowed = ieee80211_powersave_allowed(sdata); | |
1519 | ||
1520 | if (sdata->vif.bss_conf.ps != ps_allowed) { | |
1521 | sdata->vif.bss_conf.ps = ps_allowed; | |
1522 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
1527 | { | |
1528 | struct ieee80211_local *local = | |
1529 | container_of(work, struct ieee80211_local, | |
1530 | dynamic_ps_disable_work); | |
1531 | ||
1532 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1533 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1534 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1535 | } | |
1536 | ||
1537 | ieee80211_wake_queues_by_reason(&local->hw, | |
1538 | IEEE80211_MAX_QUEUE_MAP, | |
1539 | IEEE80211_QUEUE_STOP_REASON_PS, | |
1540 | false); | |
1541 | } | |
1542 | ||
1543 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1544 | { | |
1545 | struct ieee80211_local *local = | |
1546 | container_of(work, struct ieee80211_local, | |
1547 | dynamic_ps_enable_work); | |
1548 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
1549 | struct ieee80211_if_managed *ifmgd; | |
1550 | unsigned long flags; | |
1551 | int q; | |
1552 | ||
1553 | /* can only happen when PS was just disabled anyway */ | |
1554 | if (!sdata) | |
1555 | return; | |
1556 | ||
1557 | ifmgd = &sdata->u.mgd; | |
1558 | ||
1559 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
1560 | return; | |
1561 | ||
1562 | if (local->hw.conf.dynamic_ps_timeout > 0) { | |
1563 | /* don't enter PS if TX frames are pending */ | |
1564 | if (drv_tx_frames_pending(local)) { | |
1565 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1566 | msecs_to_jiffies( | |
1567 | local->hw.conf.dynamic_ps_timeout)); | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * transmission can be stopped by others which leads to | |
1573 | * dynamic_ps_timer expiry. Postpone the ps timer if it | |
1574 | * is not the actual idle state. | |
1575 | */ | |
1576 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1577 | for (q = 0; q < local->hw.queues; q++) { | |
1578 | if (local->queue_stop_reasons[q]) { | |
1579 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1580 | flags); | |
1581 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1582 | msecs_to_jiffies( | |
1583 | local->hw.conf.dynamic_ps_timeout)); | |
1584 | return; | |
1585 | } | |
1586 | } | |
1587 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1588 | } | |
1589 | ||
1590 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && | |
1591 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { | |
1592 | if (drv_tx_frames_pending(local)) { | |
1593 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1594 | msecs_to_jiffies( | |
1595 | local->hw.conf.dynamic_ps_timeout)); | |
1596 | } else { | |
1597 | ieee80211_send_nullfunc(local, sdata, 1); | |
1598 | /* Flush to get the tx status of nullfunc frame */ | |
1599 | ieee80211_flush_queues(local, sdata); | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && | |
1604 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
1605 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { | |
1606 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
1607 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
1608 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
1613 | { | |
1614 | struct ieee80211_local *local = (void *) data; | |
1615 | ||
1616 | if (local->quiescing || local->suspended) | |
1617 | return; | |
1618 | ||
1619 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); | |
1620 | } | |
1621 | ||
1622 | void ieee80211_dfs_cac_timer_work(struct work_struct *work) | |
1623 | { | |
1624 | struct delayed_work *delayed_work = | |
1625 | container_of(work, struct delayed_work, work); | |
1626 | struct ieee80211_sub_if_data *sdata = | |
1627 | container_of(delayed_work, struct ieee80211_sub_if_data, | |
1628 | dfs_cac_timer_work); | |
1629 | struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; | |
1630 | ||
1631 | mutex_lock(&sdata->local->mtx); | |
1632 | if (sdata->wdev.cac_started) { | |
1633 | ieee80211_vif_release_channel(sdata); | |
1634 | cfg80211_cac_event(sdata->dev, &chandef, | |
1635 | NL80211_RADAR_CAC_FINISHED, | |
1636 | GFP_KERNEL); | |
1637 | } | |
1638 | mutex_unlock(&sdata->local->mtx); | |
1639 | } | |
1640 | ||
1641 | static bool | |
1642 | __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) | |
1643 | { | |
1644 | struct ieee80211_local *local = sdata->local; | |
1645 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1646 | bool ret = false; | |
1647 | int ac; | |
1648 | ||
1649 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
1650 | return false; | |
1651 | ||
1652 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1653 | struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; | |
1654 | int non_acm_ac; | |
1655 | unsigned long now = jiffies; | |
1656 | ||
1657 | if (tx_tspec->action == TX_TSPEC_ACTION_NONE && | |
1658 | tx_tspec->admitted_time && | |
1659 | time_after(now, tx_tspec->time_slice_start + HZ)) { | |
1660 | tx_tspec->consumed_tx_time = 0; | |
1661 | tx_tspec->time_slice_start = now; | |
1662 | ||
1663 | if (tx_tspec->downgraded) | |
1664 | tx_tspec->action = | |
1665 | TX_TSPEC_ACTION_STOP_DOWNGRADE; | |
1666 | } | |
1667 | ||
1668 | switch (tx_tspec->action) { | |
1669 | case TX_TSPEC_ACTION_STOP_DOWNGRADE: | |
1670 | /* take the original parameters */ | |
1671 | if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) | |
1672 | sdata_err(sdata, | |
1673 | "failed to set TX queue parameters for queue %d\n", | |
1674 | ac); | |
1675 | tx_tspec->action = TX_TSPEC_ACTION_NONE; | |
1676 | tx_tspec->downgraded = false; | |
1677 | ret = true; | |
1678 | break; | |
1679 | case TX_TSPEC_ACTION_DOWNGRADE: | |
1680 | if (time_after(now, tx_tspec->time_slice_start + HZ)) { | |
1681 | tx_tspec->action = TX_TSPEC_ACTION_NONE; | |
1682 | ret = true; | |
1683 | break; | |
1684 | } | |
1685 | /* downgrade next lower non-ACM AC */ | |
1686 | for (non_acm_ac = ac + 1; | |
1687 | non_acm_ac < IEEE80211_NUM_ACS; | |
1688 | non_acm_ac++) | |
1689 | if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) | |
1690 | break; | |
1691 | /* The loop will result in using BK even if it requires | |
1692 | * admission control, such configuration makes no sense | |
1693 | * and we have to transmit somehow - the AC selection | |
1694 | * does the same thing. | |
1695 | */ | |
1696 | if (drv_conf_tx(local, sdata, ac, | |
1697 | &sdata->tx_conf[non_acm_ac])) | |
1698 | sdata_err(sdata, | |
1699 | "failed to set TX queue parameters for queue %d\n", | |
1700 | ac); | |
1701 | tx_tspec->action = TX_TSPEC_ACTION_NONE; | |
1702 | ret = true; | |
1703 | schedule_delayed_work(&ifmgd->tx_tspec_wk, | |
1704 | tx_tspec->time_slice_start + HZ - now + 1); | |
1705 | break; | |
1706 | case TX_TSPEC_ACTION_NONE: | |
1707 | /* nothing now */ | |
1708 | break; | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | return ret; | |
1713 | } | |
1714 | ||
1715 | void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) | |
1716 | { | |
1717 | if (__ieee80211_sta_handle_tspec_ac_params(sdata)) | |
1718 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); | |
1719 | } | |
1720 | ||
1721 | static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) | |
1722 | { | |
1723 | struct ieee80211_sub_if_data *sdata; | |
1724 | ||
1725 | sdata = container_of(work, struct ieee80211_sub_if_data, | |
1726 | u.mgd.tx_tspec_wk.work); | |
1727 | ieee80211_sta_handle_tspec_ac_params(sdata); | |
1728 | } | |
1729 | ||
1730 | /* MLME */ | |
1731 | static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, | |
1732 | struct ieee80211_sub_if_data *sdata, | |
1733 | const u8 *wmm_param, size_t wmm_param_len) | |
1734 | { | |
1735 | struct ieee80211_tx_queue_params params; | |
1736 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1737 | size_t left; | |
1738 | int count; | |
1739 | const u8 *pos; | |
1740 | u8 uapsd_queues = 0; | |
1741 | ||
1742 | if (!local->ops->conf_tx) | |
1743 | return false; | |
1744 | ||
1745 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
1746 | return false; | |
1747 | ||
1748 | if (!wmm_param) | |
1749 | return false; | |
1750 | ||
1751 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
1752 | return false; | |
1753 | ||
1754 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
1755 | uapsd_queues = ifmgd->uapsd_queues; | |
1756 | ||
1757 | count = wmm_param[6] & 0x0f; | |
1758 | if (count == ifmgd->wmm_last_param_set) | |
1759 | return false; | |
1760 | ifmgd->wmm_last_param_set = count; | |
1761 | ||
1762 | pos = wmm_param + 8; | |
1763 | left = wmm_param_len - 8; | |
1764 | ||
1765 | memset(¶ms, 0, sizeof(params)); | |
1766 | ||
1767 | sdata->wmm_acm = 0; | |
1768 | for (; left >= 4; left -= 4, pos += 4) { | |
1769 | int aci = (pos[0] >> 5) & 0x03; | |
1770 | int acm = (pos[0] >> 4) & 0x01; | |
1771 | bool uapsd = false; | |
1772 | int queue; | |
1773 | ||
1774 | switch (aci) { | |
1775 | case 1: /* AC_BK */ | |
1776 | queue = 3; | |
1777 | if (acm) | |
1778 | sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ | |
1779 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) | |
1780 | uapsd = true; | |
1781 | break; | |
1782 | case 2: /* AC_VI */ | |
1783 | queue = 1; | |
1784 | if (acm) | |
1785 | sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ | |
1786 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) | |
1787 | uapsd = true; | |
1788 | break; | |
1789 | case 3: /* AC_VO */ | |
1790 | queue = 0; | |
1791 | if (acm) | |
1792 | sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ | |
1793 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) | |
1794 | uapsd = true; | |
1795 | break; | |
1796 | case 0: /* AC_BE */ | |
1797 | default: | |
1798 | queue = 2; | |
1799 | if (acm) | |
1800 | sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ | |
1801 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) | |
1802 | uapsd = true; | |
1803 | break; | |
1804 | } | |
1805 | ||
1806 | params.aifs = pos[0] & 0x0f; | |
1807 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
1808 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
1809 | params.txop = get_unaligned_le16(pos + 2); | |
1810 | params.acm = acm; | |
1811 | params.uapsd = uapsd; | |
1812 | ||
1813 | mlme_dbg(sdata, | |
1814 | "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", | |
1815 | queue, aci, acm, | |
1816 | params.aifs, params.cw_min, params.cw_max, | |
1817 | params.txop, params.uapsd, | |
1818 | ifmgd->tx_tspec[queue].downgraded); | |
1819 | sdata->tx_conf[queue] = params; | |
1820 | if (!ifmgd->tx_tspec[queue].downgraded && | |
1821 | drv_conf_tx(local, sdata, queue, ¶ms)) | |
1822 | sdata_err(sdata, | |
1823 | "failed to set TX queue parameters for queue %d\n", | |
1824 | queue); | |
1825 | } | |
1826 | ||
1827 | /* enable WMM or activate new settings */ | |
1828 | sdata->vif.bss_conf.qos = true; | |
1829 | return true; | |
1830 | } | |
1831 | ||
1832 | static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) | |
1833 | { | |
1834 | lockdep_assert_held(&sdata->local->mtx); | |
1835 | ||
1836 | sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; | |
1837 | ieee80211_run_deferred_scan(sdata->local); | |
1838 | } | |
1839 | ||
1840 | static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) | |
1841 | { | |
1842 | mutex_lock(&sdata->local->mtx); | |
1843 | __ieee80211_stop_poll(sdata); | |
1844 | mutex_unlock(&sdata->local->mtx); | |
1845 | } | |
1846 | ||
1847 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
1848 | u16 capab, bool erp_valid, u8 erp) | |
1849 | { | |
1850 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
1851 | u32 changed = 0; | |
1852 | bool use_protection; | |
1853 | bool use_short_preamble; | |
1854 | bool use_short_slot; | |
1855 | ||
1856 | if (erp_valid) { | |
1857 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
1858 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
1859 | } else { | |
1860 | use_protection = false; | |
1861 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
1862 | } | |
1863 | ||
1864 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
1865 | if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ) | |
1866 | use_short_slot = true; | |
1867 | ||
1868 | if (use_protection != bss_conf->use_cts_prot) { | |
1869 | bss_conf->use_cts_prot = use_protection; | |
1870 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
1871 | } | |
1872 | ||
1873 | if (use_short_preamble != bss_conf->use_short_preamble) { | |
1874 | bss_conf->use_short_preamble = use_short_preamble; | |
1875 | changed |= BSS_CHANGED_ERP_PREAMBLE; | |
1876 | } | |
1877 | ||
1878 | if (use_short_slot != bss_conf->use_short_slot) { | |
1879 | bss_conf->use_short_slot = use_short_slot; | |
1880 | changed |= BSS_CHANGED_ERP_SLOT; | |
1881 | } | |
1882 | ||
1883 | return changed; | |
1884 | } | |
1885 | ||
1886 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, | |
1887 | struct cfg80211_bss *cbss, | |
1888 | u32 bss_info_changed) | |
1889 | { | |
1890 | struct ieee80211_bss *bss = (void *)cbss->priv; | |
1891 | struct ieee80211_local *local = sdata->local; | |
1892 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
1893 | ||
1894 | bss_info_changed |= BSS_CHANGED_ASSOC; | |
1895 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
1896 | bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); | |
1897 | ||
1898 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( | |
1899 | beacon_loss_count * bss_conf->beacon_int)); | |
1900 | ||
1901 | sdata->u.mgd.associated = cbss; | |
1902 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
1903 | ||
1904 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; | |
1905 | ||
1906 | if (sdata->vif.p2p) { | |
1907 | const struct cfg80211_bss_ies *ies; | |
1908 | ||
1909 | rcu_read_lock(); | |
1910 | ies = rcu_dereference(cbss->ies); | |
1911 | if (ies) { | |
1912 | int ret; | |
1913 | ||
1914 | ret = cfg80211_get_p2p_attr( | |
1915 | ies->data, ies->len, | |
1916 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, | |
1917 | (u8 *) &bss_conf->p2p_noa_attr, | |
1918 | sizeof(bss_conf->p2p_noa_attr)); | |
1919 | if (ret >= 2) { | |
1920 | sdata->u.mgd.p2p_noa_index = | |
1921 | bss_conf->p2p_noa_attr.index; | |
1922 | bss_info_changed |= BSS_CHANGED_P2P_PS; | |
1923 | } | |
1924 | } | |
1925 | rcu_read_unlock(); | |
1926 | } | |
1927 | ||
1928 | /* just to be sure */ | |
1929 | ieee80211_stop_poll(sdata); | |
1930 | ||
1931 | ieee80211_led_assoc(local, 1); | |
1932 | ||
1933 | if (sdata->u.mgd.have_beacon) { | |
1934 | /* | |
1935 | * If the AP is buggy we may get here with no DTIM period | |
1936 | * known, so assume it's 1 which is the only safe assumption | |
1937 | * in that case, although if the TIM IE is broken powersave | |
1938 | * probably just won't work at all. | |
1939 | */ | |
1940 | bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; | |
1941 | bss_conf->beacon_rate = bss->beacon_rate; | |
1942 | bss_info_changed |= BSS_CHANGED_BEACON_INFO; | |
1943 | } else { | |
1944 | bss_conf->beacon_rate = NULL; | |
1945 | bss_conf->dtim_period = 0; | |
1946 | } | |
1947 | ||
1948 | bss_conf->assoc = 1; | |
1949 | ||
1950 | /* Tell the driver to monitor connection quality (if supported) */ | |
1951 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && | |
1952 | bss_conf->cqm_rssi_thold) | |
1953 | bss_info_changed |= BSS_CHANGED_CQM; | |
1954 | ||
1955 | /* Enable ARP filtering */ | |
1956 | if (bss_conf->arp_addr_cnt) | |
1957 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; | |
1958 | ||
1959 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
1960 | ||
1961 | mutex_lock(&local->iflist_mtx); | |
1962 | ieee80211_recalc_ps(local, -1); | |
1963 | mutex_unlock(&local->iflist_mtx); | |
1964 | ||
1965 | ieee80211_recalc_smps(sdata); | |
1966 | ieee80211_recalc_ps_vif(sdata); | |
1967 | ||
1968 | netif_carrier_on(sdata->dev); | |
1969 | } | |
1970 | ||
1971 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, | |
1972 | u16 stype, u16 reason, bool tx, | |
1973 | u8 *frame_buf) | |
1974 | { | |
1975 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1976 | struct ieee80211_local *local = sdata->local; | |
1977 | u32 changed = 0; | |
1978 | ||
1979 | sdata_assert_lock(sdata); | |
1980 | ||
1981 | if (WARN_ON_ONCE(tx && !frame_buf)) | |
1982 | return; | |
1983 | ||
1984 | if (WARN_ON(!ifmgd->associated)) | |
1985 | return; | |
1986 | ||
1987 | ieee80211_stop_poll(sdata); | |
1988 | ||
1989 | ifmgd->associated = NULL; | |
1990 | netif_carrier_off(sdata->dev); | |
1991 | ||
1992 | /* | |
1993 | * if we want to get out of ps before disassoc (why?) we have | |
1994 | * to do it before sending disassoc, as otherwise the null-packet | |
1995 | * won't be valid. | |
1996 | */ | |
1997 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1998 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1999 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2000 | } | |
2001 | local->ps_sdata = NULL; | |
2002 | ||
2003 | /* disable per-vif ps */ | |
2004 | ieee80211_recalc_ps_vif(sdata); | |
2005 | ||
2006 | /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ | |
2007 | if (tx) | |
2008 | ieee80211_flush_queues(local, sdata); | |
2009 | ||
2010 | /* deauthenticate/disassociate now */ | |
2011 | if (tx || frame_buf) | |
2012 | ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, | |
2013 | reason, tx, frame_buf); | |
2014 | ||
2015 | /* flush out frame */ | |
2016 | if (tx) | |
2017 | ieee80211_flush_queues(local, sdata); | |
2018 | ||
2019 | /* clear bssid only after building the needed mgmt frames */ | |
2020 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
2021 | ||
2022 | /* remove AP and TDLS peers */ | |
2023 | sta_info_flush(sdata); | |
2024 | ||
2025 | /* finally reset all BSS / config parameters */ | |
2026 | changed |= ieee80211_reset_erp_info(sdata); | |
2027 | ||
2028 | ieee80211_led_assoc(local, 0); | |
2029 | changed |= BSS_CHANGED_ASSOC; | |
2030 | sdata->vif.bss_conf.assoc = false; | |
2031 | ||
2032 | ifmgd->p2p_noa_index = -1; | |
2033 | memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, | |
2034 | sizeof(sdata->vif.bss_conf.p2p_noa_attr)); | |
2035 | ||
2036 | /* on the next assoc, re-program HT/VHT parameters */ | |
2037 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); | |
2038 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); | |
2039 | memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); | |
2040 | memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); | |
2041 | ||
2042 | sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; | |
2043 | ||
2044 | del_timer_sync(&local->dynamic_ps_timer); | |
2045 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
2046 | ||
2047 | /* Disable ARP filtering */ | |
2048 | if (sdata->vif.bss_conf.arp_addr_cnt) | |
2049 | changed |= BSS_CHANGED_ARP_FILTER; | |
2050 | ||
2051 | sdata->vif.bss_conf.qos = false; | |
2052 | changed |= BSS_CHANGED_QOS; | |
2053 | ||
2054 | /* The BSSID (not really interesting) and HT changed */ | |
2055 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
2056 | ieee80211_bss_info_change_notify(sdata, changed); | |
2057 | ||
2058 | /* disassociated - set to defaults now */ | |
2059 | ieee80211_set_wmm_default(sdata, false); | |
2060 | ||
2061 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); | |
2062 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
2063 | del_timer_sync(&sdata->u.mgd.timer); | |
2064 | del_timer_sync(&sdata->u.mgd.chswitch_timer); | |
2065 | ||
2066 | sdata->vif.bss_conf.dtim_period = 0; | |
2067 | sdata->vif.bss_conf.beacon_rate = NULL; | |
2068 | ||
2069 | ifmgd->have_beacon = false; | |
2070 | ||
2071 | ifmgd->flags = 0; | |
2072 | mutex_lock(&local->mtx); | |
2073 | ieee80211_vif_release_channel(sdata); | |
2074 | ||
2075 | sdata->vif.csa_active = false; | |
2076 | ifmgd->csa_waiting_bcn = false; | |
2077 | if (sdata->csa_block_tx) { | |
2078 | ieee80211_wake_vif_queues(local, sdata, | |
2079 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
2080 | sdata->csa_block_tx = false; | |
2081 | } | |
2082 | mutex_unlock(&local->mtx); | |
2083 | ||
2084 | /* existing TX TSPEC sessions no longer exist */ | |
2085 | memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); | |
2086 | cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); | |
2087 | ||
2088 | sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; | |
2089 | } | |
2090 | ||
2091 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, | |
2092 | struct ieee80211_hdr *hdr) | |
2093 | { | |
2094 | /* | |
2095 | * We can postpone the mgd.timer whenever receiving unicast frames | |
2096 | * from AP because we know that the connection is working both ways | |
2097 | * at that time. But multicast frames (and hence also beacons) must | |
2098 | * be ignored here, because we need to trigger the timer during | |
2099 | * data idle periods for sending the periodic probe request to the | |
2100 | * AP we're connected to. | |
2101 | */ | |
2102 | if (is_multicast_ether_addr(hdr->addr1)) | |
2103 | return; | |
2104 | ||
2105 | ieee80211_sta_reset_conn_monitor(sdata); | |
2106 | } | |
2107 | ||
2108 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) | |
2109 | { | |
2110 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2111 | struct ieee80211_local *local = sdata->local; | |
2112 | ||
2113 | mutex_lock(&local->mtx); | |
2114 | if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) | |
2115 | goto out; | |
2116 | ||
2117 | __ieee80211_stop_poll(sdata); | |
2118 | ||
2119 | mutex_lock(&local->iflist_mtx); | |
2120 | ieee80211_recalc_ps(local, -1); | |
2121 | mutex_unlock(&local->iflist_mtx); | |
2122 | ||
2123 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
2124 | goto out; | |
2125 | ||
2126 | /* | |
2127 | * We've received a probe response, but are not sure whether | |
2128 | * we have or will be receiving any beacons or data, so let's | |
2129 | * schedule the timers again, just in case. | |
2130 | */ | |
2131 | ieee80211_sta_reset_beacon_monitor(sdata); | |
2132 | ||
2133 | mod_timer(&ifmgd->conn_mon_timer, | |
2134 | round_jiffies_up(jiffies + | |
2135 | IEEE80211_CONNECTION_IDLE_TIME)); | |
2136 | out: | |
2137 | mutex_unlock(&local->mtx); | |
2138 | } | |
2139 | ||
2140 | static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, | |
2141 | struct ieee80211_hdr *hdr, | |
2142 | u16 tx_time) | |
2143 | { | |
2144 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2145 | u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
2146 | int ac = ieee80211_ac_from_tid(tid); | |
2147 | struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; | |
2148 | unsigned long now = jiffies; | |
2149 | ||
2150 | if (likely(!tx_tspec->admitted_time)) | |
2151 | return; | |
2152 | ||
2153 | if (time_after(now, tx_tspec->time_slice_start + HZ)) { | |
2154 | tx_tspec->consumed_tx_time = 0; | |
2155 | tx_tspec->time_slice_start = now; | |
2156 | ||
2157 | if (tx_tspec->downgraded) { | |
2158 | tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; | |
2159 | schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | if (tx_tspec->downgraded) | |
2164 | return; | |
2165 | ||
2166 | tx_tspec->consumed_tx_time += tx_time; | |
2167 | ||
2168 | if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { | |
2169 | tx_tspec->downgraded = true; | |
2170 | tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; | |
2171 | schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, | |
2176 | struct ieee80211_hdr *hdr, bool ack, u16 tx_time) | |
2177 | { | |
2178 | ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); | |
2179 | ||
2180 | if (!ieee80211_is_data(hdr->frame_control)) | |
2181 | return; | |
2182 | ||
2183 | if (ieee80211_is_nullfunc(hdr->frame_control) && | |
2184 | sdata->u.mgd.probe_send_count > 0) { | |
2185 | if (ack) | |
2186 | ieee80211_sta_reset_conn_monitor(sdata); | |
2187 | else | |
2188 | sdata->u.mgd.nullfunc_failed = true; | |
2189 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2190 | return; | |
2191 | } | |
2192 | ||
2193 | if (ack) | |
2194 | ieee80211_sta_reset_conn_monitor(sdata); | |
2195 | } | |
2196 | ||
2197 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) | |
2198 | { | |
2199 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2200 | const u8 *ssid; | |
2201 | u8 *dst = ifmgd->associated->bssid; | |
2202 | u8 unicast_limit = max(1, max_probe_tries - 3); | |
2203 | ||
2204 | /* | |
2205 | * Try sending broadcast probe requests for the last three | |
2206 | * probe requests after the first ones failed since some | |
2207 | * buggy APs only support broadcast probe requests. | |
2208 | */ | |
2209 | if (ifmgd->probe_send_count >= unicast_limit) | |
2210 | dst = NULL; | |
2211 | ||
2212 | /* | |
2213 | * When the hardware reports an accurate Tx ACK status, it's | |
2214 | * better to send a nullfunc frame instead of a probe request, | |
2215 | * as it will kick us off the AP quickly if we aren't associated | |
2216 | * anymore. The timeout will be reset if the frame is ACKed by | |
2217 | * the AP. | |
2218 | */ | |
2219 | ifmgd->probe_send_count++; | |
2220 | ||
2221 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { | |
2222 | ifmgd->nullfunc_failed = false; | |
2223 | ieee80211_send_nullfunc(sdata->local, sdata, 0); | |
2224 | } else { | |
2225 | int ssid_len; | |
2226 | ||
2227 | rcu_read_lock(); | |
2228 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); | |
2229 | if (WARN_ON_ONCE(ssid == NULL)) | |
2230 | ssid_len = 0; | |
2231 | else | |
2232 | ssid_len = ssid[1]; | |
2233 | ||
2234 | ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL, | |
2235 | ssid + 2, ssid_len, NULL, | |
2236 | 0, (u32) -1, true, 0, | |
2237 | ifmgd->associated->channel, false); | |
2238 | rcu_read_unlock(); | |
2239 | } | |
2240 | ||
2241 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); | |
2242 | run_again(sdata, ifmgd->probe_timeout); | |
2243 | } | |
2244 | ||
2245 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, | |
2246 | bool beacon) | |
2247 | { | |
2248 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2249 | bool already = false; | |
2250 | ||
2251 | if (!ieee80211_sdata_running(sdata)) | |
2252 | return; | |
2253 | ||
2254 | sdata_lock(sdata); | |
2255 | ||
2256 | if (!ifmgd->associated) | |
2257 | goto out; | |
2258 | ||
2259 | mutex_lock(&sdata->local->mtx); | |
2260 | ||
2261 | if (sdata->local->tmp_channel || sdata->local->scanning) { | |
2262 | mutex_unlock(&sdata->local->mtx); | |
2263 | goto out; | |
2264 | } | |
2265 | ||
2266 | if (beacon) { | |
2267 | mlme_dbg_ratelimited(sdata, | |
2268 | "detected beacon loss from AP (missed %d beacons) - probing\n", | |
2269 | beacon_loss_count); | |
2270 | ||
2271 | ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); | |
2272 | } | |
2273 | ||
2274 | /* | |
2275 | * The driver/our work has already reported this event or the | |
2276 | * connection monitoring has kicked in and we have already sent | |
2277 | * a probe request. Or maybe the AP died and the driver keeps | |
2278 | * reporting until we disassociate... | |
2279 | * | |
2280 | * In either case we have to ignore the current call to this | |
2281 | * function (except for setting the correct probe reason bit) | |
2282 | * because otherwise we would reset the timer every time and | |
2283 | * never check whether we received a probe response! | |
2284 | */ | |
2285 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) | |
2286 | already = true; | |
2287 | ||
2288 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
2289 | ||
2290 | mutex_unlock(&sdata->local->mtx); | |
2291 | ||
2292 | if (already) | |
2293 | goto out; | |
2294 | ||
2295 | mutex_lock(&sdata->local->iflist_mtx); | |
2296 | ieee80211_recalc_ps(sdata->local, -1); | |
2297 | mutex_unlock(&sdata->local->iflist_mtx); | |
2298 | ||
2299 | ifmgd->probe_send_count = 0; | |
2300 | ieee80211_mgd_probe_ap_send(sdata); | |
2301 | out: | |
2302 | sdata_unlock(sdata); | |
2303 | } | |
2304 | ||
2305 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, | |
2306 | struct ieee80211_vif *vif) | |
2307 | { | |
2308 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2309 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2310 | struct cfg80211_bss *cbss; | |
2311 | struct sk_buff *skb; | |
2312 | const u8 *ssid; | |
2313 | int ssid_len; | |
2314 | ||
2315 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2316 | return NULL; | |
2317 | ||
2318 | sdata_assert_lock(sdata); | |
2319 | ||
2320 | if (ifmgd->associated) | |
2321 | cbss = ifmgd->associated; | |
2322 | else if (ifmgd->auth_data) | |
2323 | cbss = ifmgd->auth_data->bss; | |
2324 | else if (ifmgd->assoc_data) | |
2325 | cbss = ifmgd->assoc_data->bss; | |
2326 | else | |
2327 | return NULL; | |
2328 | ||
2329 | rcu_read_lock(); | |
2330 | ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); | |
2331 | if (WARN_ON_ONCE(ssid == NULL)) | |
2332 | ssid_len = 0; | |
2333 | else | |
2334 | ssid_len = ssid[1]; | |
2335 | ||
2336 | skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, | |
2337 | (u32) -1, cbss->channel, | |
2338 | ssid + 2, ssid_len, | |
2339 | NULL, 0, true); | |
2340 | rcu_read_unlock(); | |
2341 | ||
2342 | return skb; | |
2343 | } | |
2344 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); | |
2345 | ||
2346 | static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) | |
2347 | { | |
2348 | struct ieee80211_local *local = sdata->local; | |
2349 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2350 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
2351 | ||
2352 | sdata_lock(sdata); | |
2353 | if (!ifmgd->associated) { | |
2354 | sdata_unlock(sdata); | |
2355 | return; | |
2356 | } | |
2357 | ||
2358 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
2359 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
2360 | true, frame_buf); | |
2361 | mutex_lock(&local->mtx); | |
2362 | sdata->vif.csa_active = false; | |
2363 | ifmgd->csa_waiting_bcn = false; | |
2364 | if (sdata->csa_block_tx) { | |
2365 | ieee80211_wake_vif_queues(local, sdata, | |
2366 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
2367 | sdata->csa_block_tx = false; | |
2368 | } | |
2369 | mutex_unlock(&local->mtx); | |
2370 | ||
2371 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
2372 | IEEE80211_DEAUTH_FRAME_LEN); | |
2373 | sdata_unlock(sdata); | |
2374 | } | |
2375 | ||
2376 | static void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
2377 | { | |
2378 | struct ieee80211_sub_if_data *sdata = | |
2379 | container_of(work, struct ieee80211_sub_if_data, | |
2380 | u.mgd.beacon_connection_loss_work); | |
2381 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2382 | struct sta_info *sta; | |
2383 | ||
2384 | if (ifmgd->associated) { | |
2385 | rcu_read_lock(); | |
2386 | sta = sta_info_get(sdata, ifmgd->bssid); | |
2387 | if (sta) | |
2388 | sta->beacon_loss_count++; | |
2389 | rcu_read_unlock(); | |
2390 | } | |
2391 | ||
2392 | if (ifmgd->connection_loss) { | |
2393 | sdata_info(sdata, "Connection to AP %pM lost\n", | |
2394 | ifmgd->bssid); | |
2395 | __ieee80211_disconnect(sdata); | |
2396 | } else { | |
2397 | ieee80211_mgd_probe_ap(sdata, true); | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) | |
2402 | { | |
2403 | struct ieee80211_sub_if_data *sdata = | |
2404 | container_of(work, struct ieee80211_sub_if_data, | |
2405 | u.mgd.csa_connection_drop_work); | |
2406 | ||
2407 | __ieee80211_disconnect(sdata); | |
2408 | } | |
2409 | ||
2410 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
2411 | { | |
2412 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2413 | struct ieee80211_hw *hw = &sdata->local->hw; | |
2414 | ||
2415 | trace_api_beacon_loss(sdata); | |
2416 | ||
2417 | sdata->u.mgd.connection_loss = false; | |
2418 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
2419 | } | |
2420 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
2421 | ||
2422 | void ieee80211_connection_loss(struct ieee80211_vif *vif) | |
2423 | { | |
2424 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2425 | struct ieee80211_hw *hw = &sdata->local->hw; | |
2426 | ||
2427 | trace_api_connection_loss(sdata); | |
2428 | ||
2429 | sdata->u.mgd.connection_loss = true; | |
2430 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
2431 | } | |
2432 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
2433 | ||
2434 | ||
2435 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, | |
2436 | bool assoc) | |
2437 | { | |
2438 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
2439 | ||
2440 | sdata_assert_lock(sdata); | |
2441 | ||
2442 | if (!assoc) { | |
2443 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); | |
2444 | ||
2445 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
2446 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
2447 | sdata->u.mgd.flags = 0; | |
2448 | mutex_lock(&sdata->local->mtx); | |
2449 | ieee80211_vif_release_channel(sdata); | |
2450 | mutex_unlock(&sdata->local->mtx); | |
2451 | } | |
2452 | ||
2453 | cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); | |
2454 | kfree(auth_data); | |
2455 | sdata->u.mgd.auth_data = NULL; | |
2456 | } | |
2457 | ||
2458 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
2459 | struct ieee80211_mgmt *mgmt, size_t len) | |
2460 | { | |
2461 | struct ieee80211_local *local = sdata->local; | |
2462 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
2463 | u8 *pos; | |
2464 | struct ieee802_11_elems elems; | |
2465 | u32 tx_flags = 0; | |
2466 | ||
2467 | pos = mgmt->u.auth.variable; | |
2468 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); | |
2469 | if (!elems.challenge) | |
2470 | return; | |
2471 | auth_data->expected_transaction = 4; | |
2472 | drv_mgd_prepare_tx(sdata->local, sdata); | |
2473 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) | |
2474 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
2475 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
2476 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, | |
2477 | elems.challenge - 2, elems.challenge_len + 2, | |
2478 | auth_data->bss->bssid, auth_data->bss->bssid, | |
2479 | auth_data->key, auth_data->key_len, | |
2480 | auth_data->key_idx, tx_flags); | |
2481 | } | |
2482 | ||
2483 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
2484 | struct ieee80211_mgmt *mgmt, size_t len) | |
2485 | { | |
2486 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2487 | u8 bssid[ETH_ALEN]; | |
2488 | u16 auth_alg, auth_transaction, status_code; | |
2489 | struct sta_info *sta; | |
2490 | ||
2491 | sdata_assert_lock(sdata); | |
2492 | ||
2493 | if (len < 24 + 6) | |
2494 | return; | |
2495 | ||
2496 | if (!ifmgd->auth_data || ifmgd->auth_data->done) | |
2497 | return; | |
2498 | ||
2499 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
2500 | ||
2501 | if (!ether_addr_equal(bssid, mgmt->bssid)) | |
2502 | return; | |
2503 | ||
2504 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
2505 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
2506 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
2507 | ||
2508 | if (auth_alg != ifmgd->auth_data->algorithm || | |
2509 | auth_transaction != ifmgd->auth_data->expected_transaction) { | |
2510 | sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", | |
2511 | mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, | |
2512 | auth_transaction, | |
2513 | ifmgd->auth_data->expected_transaction); | |
2514 | return; | |
2515 | } | |
2516 | ||
2517 | if (status_code != WLAN_STATUS_SUCCESS) { | |
2518 | sdata_info(sdata, "%pM denied authentication (status %d)\n", | |
2519 | mgmt->sa, status_code); | |
2520 | ieee80211_destroy_auth_data(sdata, false); | |
2521 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); | |
2522 | return; | |
2523 | } | |
2524 | ||
2525 | switch (ifmgd->auth_data->algorithm) { | |
2526 | case WLAN_AUTH_OPEN: | |
2527 | case WLAN_AUTH_LEAP: | |
2528 | case WLAN_AUTH_FT: | |
2529 | case WLAN_AUTH_SAE: | |
2530 | break; | |
2531 | case WLAN_AUTH_SHARED_KEY: | |
2532 | if (ifmgd->auth_data->expected_transaction != 4) { | |
2533 | ieee80211_auth_challenge(sdata, mgmt, len); | |
2534 | /* need another frame */ | |
2535 | return; | |
2536 | } | |
2537 | break; | |
2538 | default: | |
2539 | WARN_ONCE(1, "invalid auth alg %d", | |
2540 | ifmgd->auth_data->algorithm); | |
2541 | return; | |
2542 | } | |
2543 | ||
2544 | sdata_info(sdata, "authenticated\n"); | |
2545 | ifmgd->auth_data->done = true; | |
2546 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; | |
2547 | ifmgd->auth_data->timeout_started = true; | |
2548 | run_again(sdata, ifmgd->auth_data->timeout); | |
2549 | ||
2550 | if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && | |
2551 | ifmgd->auth_data->expected_transaction != 2) { | |
2552 | /* | |
2553 | * Report auth frame to user space for processing since another | |
2554 | * round of Authentication frames is still needed. | |
2555 | */ | |
2556 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); | |
2557 | return; | |
2558 | } | |
2559 | ||
2560 | /* move station state to auth */ | |
2561 | mutex_lock(&sdata->local->sta_mtx); | |
2562 | sta = sta_info_get(sdata, bssid); | |
2563 | if (!sta) { | |
2564 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); | |
2565 | goto out_err; | |
2566 | } | |
2567 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { | |
2568 | sdata_info(sdata, "failed moving %pM to auth\n", bssid); | |
2569 | goto out_err; | |
2570 | } | |
2571 | mutex_unlock(&sdata->local->sta_mtx); | |
2572 | ||
2573 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); | |
2574 | return; | |
2575 | out_err: | |
2576 | mutex_unlock(&sdata->local->sta_mtx); | |
2577 | /* ignore frame -- wait for timeout */ | |
2578 | } | |
2579 | ||
2580 | #define case_WLAN(type) \ | |
2581 | case WLAN_REASON_##type: return #type | |
2582 | ||
2583 | static const char *ieee80211_get_reason_code_string(u16 reason_code) | |
2584 | { | |
2585 | switch (reason_code) { | |
2586 | case_WLAN(UNSPECIFIED); | |
2587 | case_WLAN(PREV_AUTH_NOT_VALID); | |
2588 | case_WLAN(DEAUTH_LEAVING); | |
2589 | case_WLAN(DISASSOC_DUE_TO_INACTIVITY); | |
2590 | case_WLAN(DISASSOC_AP_BUSY); | |
2591 | case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); | |
2592 | case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); | |
2593 | case_WLAN(DISASSOC_STA_HAS_LEFT); | |
2594 | case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); | |
2595 | case_WLAN(DISASSOC_BAD_POWER); | |
2596 | case_WLAN(DISASSOC_BAD_SUPP_CHAN); | |
2597 | case_WLAN(INVALID_IE); | |
2598 | case_WLAN(MIC_FAILURE); | |
2599 | case_WLAN(4WAY_HANDSHAKE_TIMEOUT); | |
2600 | case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); | |
2601 | case_WLAN(IE_DIFFERENT); | |
2602 | case_WLAN(INVALID_GROUP_CIPHER); | |
2603 | case_WLAN(INVALID_PAIRWISE_CIPHER); | |
2604 | case_WLAN(INVALID_AKMP); | |
2605 | case_WLAN(UNSUPP_RSN_VERSION); | |
2606 | case_WLAN(INVALID_RSN_IE_CAP); | |
2607 | case_WLAN(IEEE8021X_FAILED); | |
2608 | case_WLAN(CIPHER_SUITE_REJECTED); | |
2609 | case_WLAN(DISASSOC_UNSPECIFIED_QOS); | |
2610 | case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); | |
2611 | case_WLAN(DISASSOC_LOW_ACK); | |
2612 | case_WLAN(DISASSOC_QAP_EXCEED_TXOP); | |
2613 | case_WLAN(QSTA_LEAVE_QBSS); | |
2614 | case_WLAN(QSTA_NOT_USE); | |
2615 | case_WLAN(QSTA_REQUIRE_SETUP); | |
2616 | case_WLAN(QSTA_TIMEOUT); | |
2617 | case_WLAN(QSTA_CIPHER_NOT_SUPP); | |
2618 | case_WLAN(MESH_PEER_CANCELED); | |
2619 | case_WLAN(MESH_MAX_PEERS); | |
2620 | case_WLAN(MESH_CONFIG); | |
2621 | case_WLAN(MESH_CLOSE); | |
2622 | case_WLAN(MESH_MAX_RETRIES); | |
2623 | case_WLAN(MESH_CONFIRM_TIMEOUT); | |
2624 | case_WLAN(MESH_INVALID_GTK); | |
2625 | case_WLAN(MESH_INCONSISTENT_PARAM); | |
2626 | case_WLAN(MESH_INVALID_SECURITY); | |
2627 | case_WLAN(MESH_PATH_ERROR); | |
2628 | case_WLAN(MESH_PATH_NOFORWARD); | |
2629 | case_WLAN(MESH_PATH_DEST_UNREACHABLE); | |
2630 | case_WLAN(MAC_EXISTS_IN_MBSS); | |
2631 | case_WLAN(MESH_CHAN_REGULATORY); | |
2632 | case_WLAN(MESH_CHAN); | |
2633 | default: return "<unknown>"; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
2638 | struct ieee80211_mgmt *mgmt, size_t len) | |
2639 | { | |
2640 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2641 | const u8 *bssid = NULL; | |
2642 | u16 reason_code; | |
2643 | ||
2644 | sdata_assert_lock(sdata); | |
2645 | ||
2646 | if (len < 24 + 2) | |
2647 | return; | |
2648 | ||
2649 | if (!ifmgd->associated || | |
2650 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) | |
2651 | return; | |
2652 | ||
2653 | bssid = ifmgd->associated->bssid; | |
2654 | ||
2655 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
2656 | ||
2657 | sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", | |
2658 | bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); | |
2659 | ||
2660 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); | |
2661 | ||
2662 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); | |
2663 | } | |
2664 | ||
2665 | ||
2666 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
2667 | struct ieee80211_mgmt *mgmt, size_t len) | |
2668 | { | |
2669 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2670 | u16 reason_code; | |
2671 | ||
2672 | sdata_assert_lock(sdata); | |
2673 | ||
2674 | if (len < 24 + 2) | |
2675 | return; | |
2676 | ||
2677 | if (!ifmgd->associated || | |
2678 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) | |
2679 | return; | |
2680 | ||
2681 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
2682 | ||
2683 | sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", | |
2684 | mgmt->sa, reason_code); | |
2685 | ||
2686 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); | |
2687 | ||
2688 | cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); | |
2689 | } | |
2690 | ||
2691 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, | |
2692 | u8 *supp_rates, unsigned int supp_rates_len, | |
2693 | u32 *rates, u32 *basic_rates, | |
2694 | bool *have_higher_than_11mbit, | |
2695 | int *min_rate, int *min_rate_index, | |
2696 | int shift, u32 rate_flags) | |
2697 | { | |
2698 | int i, j; | |
2699 | ||
2700 | for (i = 0; i < supp_rates_len; i++) { | |
2701 | int rate = supp_rates[i] & 0x7f; | |
2702 | bool is_basic = !!(supp_rates[i] & 0x80); | |
2703 | ||
2704 | if ((rate * 5 * (1 << shift)) > 110) | |
2705 | *have_higher_than_11mbit = true; | |
2706 | ||
2707 | /* | |
2708 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 | |
2709 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. | |
2710 | * | |
2711 | * Note: Even through the membership selector and the basic | |
2712 | * rate flag share the same bit, they are not exactly | |
2713 | * the same. | |
2714 | */ | |
2715 | if (!!(supp_rates[i] & 0x80) && | |
2716 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
2717 | continue; | |
2718 | ||
2719 | for (j = 0; j < sband->n_bitrates; j++) { | |
2720 | struct ieee80211_rate *br; | |
2721 | int brate; | |
2722 | ||
2723 | br = &sband->bitrates[j]; | |
2724 | if ((rate_flags & br->flags) != rate_flags) | |
2725 | continue; | |
2726 | ||
2727 | brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); | |
2728 | if (brate == rate) { | |
2729 | *rates |= BIT(j); | |
2730 | if (is_basic) | |
2731 | *basic_rates |= BIT(j); | |
2732 | if ((rate * 5) < *min_rate) { | |
2733 | *min_rate = rate * 5; | |
2734 | *min_rate_index = j; | |
2735 | } | |
2736 | break; | |
2737 | } | |
2738 | } | |
2739 | } | |
2740 | } | |
2741 | ||
2742 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, | |
2743 | bool assoc) | |
2744 | { | |
2745 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2746 | ||
2747 | sdata_assert_lock(sdata); | |
2748 | ||
2749 | if (!assoc) { | |
2750 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); | |
2751 | ||
2752 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
2753 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
2754 | sdata->u.mgd.flags = 0; | |
2755 | mutex_lock(&sdata->local->mtx); | |
2756 | ieee80211_vif_release_channel(sdata); | |
2757 | mutex_unlock(&sdata->local->mtx); | |
2758 | } | |
2759 | ||
2760 | kfree(assoc_data); | |
2761 | sdata->u.mgd.assoc_data = NULL; | |
2762 | } | |
2763 | ||
2764 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, | |
2765 | struct cfg80211_bss *cbss, | |
2766 | struct ieee80211_mgmt *mgmt, size_t len) | |
2767 | { | |
2768 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2769 | struct ieee80211_local *local = sdata->local; | |
2770 | struct ieee80211_supported_band *sband; | |
2771 | struct sta_info *sta; | |
2772 | u8 *pos; | |
2773 | u16 capab_info, aid; | |
2774 | struct ieee802_11_elems elems; | |
2775 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
2776 | const struct cfg80211_bss_ies *bss_ies = NULL; | |
2777 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
2778 | u32 changed = 0; | |
2779 | int err; | |
2780 | bool ret; | |
2781 | ||
2782 | /* AssocResp and ReassocResp have identical structure */ | |
2783 | ||
2784 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
2785 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2786 | ||
2787 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
2788 | sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", | |
2789 | aid); | |
2790 | aid &= ~(BIT(15) | BIT(14)); | |
2791 | ||
2792 | ifmgd->broken_ap = false; | |
2793 | ||
2794 | if (aid == 0 || aid > IEEE80211_MAX_AID) { | |
2795 | sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", | |
2796 | aid); | |
2797 | aid = 0; | |
2798 | ifmgd->broken_ap = true; | |
2799 | } | |
2800 | ||
2801 | pos = mgmt->u.assoc_resp.variable; | |
2802 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); | |
2803 | ||
2804 | if (!elems.supp_rates) { | |
2805 | sdata_info(sdata, "no SuppRates element in AssocResp\n"); | |
2806 | return false; | |
2807 | } | |
2808 | ||
2809 | ifmgd->aid = aid; | |
2810 | ifmgd->tdls_chan_switch_prohibited = | |
2811 | elems.ext_capab && elems.ext_capab_len >= 5 && | |
2812 | (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); | |
2813 | ||
2814 | /* | |
2815 | * Some APs are erroneously not including some information in their | |
2816 | * (re)association response frames. Try to recover by using the data | |
2817 | * from the beacon or probe response. This seems to afflict mobile | |
2818 | * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", | |
2819 | * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. | |
2820 | */ | |
2821 | if ((assoc_data->wmm && !elems.wmm_param) || | |
2822 | (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && | |
2823 | (!elems.ht_cap_elem || !elems.ht_operation)) || | |
2824 | (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && | |
2825 | (!elems.vht_cap_elem || !elems.vht_operation))) { | |
2826 | const struct cfg80211_bss_ies *ies; | |
2827 | struct ieee802_11_elems bss_elems; | |
2828 | ||
2829 | rcu_read_lock(); | |
2830 | ies = rcu_dereference(cbss->ies); | |
2831 | if (ies) | |
2832 | bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, | |
2833 | GFP_ATOMIC); | |
2834 | rcu_read_unlock(); | |
2835 | if (!bss_ies) | |
2836 | return false; | |
2837 | ||
2838 | ieee802_11_parse_elems(bss_ies->data, bss_ies->len, | |
2839 | false, &bss_elems); | |
2840 | if (assoc_data->wmm && | |
2841 | !elems.wmm_param && bss_elems.wmm_param) { | |
2842 | elems.wmm_param = bss_elems.wmm_param; | |
2843 | sdata_info(sdata, | |
2844 | "AP bug: WMM param missing from AssocResp\n"); | |
2845 | } | |
2846 | ||
2847 | /* | |
2848 | * Also check if we requested HT/VHT, otherwise the AP doesn't | |
2849 | * have to include the IEs in the (re)association response. | |
2850 | */ | |
2851 | if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && | |
2852 | !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { | |
2853 | elems.ht_cap_elem = bss_elems.ht_cap_elem; | |
2854 | sdata_info(sdata, | |
2855 | "AP bug: HT capability missing from AssocResp\n"); | |
2856 | } | |
2857 | if (!elems.ht_operation && bss_elems.ht_operation && | |
2858 | !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { | |
2859 | elems.ht_operation = bss_elems.ht_operation; | |
2860 | sdata_info(sdata, | |
2861 | "AP bug: HT operation missing from AssocResp\n"); | |
2862 | } | |
2863 | if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && | |
2864 | !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { | |
2865 | elems.vht_cap_elem = bss_elems.vht_cap_elem; | |
2866 | sdata_info(sdata, | |
2867 | "AP bug: VHT capa missing from AssocResp\n"); | |
2868 | } | |
2869 | if (!elems.vht_operation && bss_elems.vht_operation && | |
2870 | !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { | |
2871 | elems.vht_operation = bss_elems.vht_operation; | |
2872 | sdata_info(sdata, | |
2873 | "AP bug: VHT operation missing from AssocResp\n"); | |
2874 | } | |
2875 | } | |
2876 | ||
2877 | /* | |
2878 | * We previously checked these in the beacon/probe response, so | |
2879 | * they should be present here. This is just a safety net. | |
2880 | */ | |
2881 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && | |
2882 | (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { | |
2883 | sdata_info(sdata, | |
2884 | "HT AP is missing WMM params or HT capability/operation\n"); | |
2885 | ret = false; | |
2886 | goto out; | |
2887 | } | |
2888 | ||
2889 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && | |
2890 | (!elems.vht_cap_elem || !elems.vht_operation)) { | |
2891 | sdata_info(sdata, | |
2892 | "VHT AP is missing VHT capability/operation\n"); | |
2893 | ret = false; | |
2894 | goto out; | |
2895 | } | |
2896 | ||
2897 | mutex_lock(&sdata->local->sta_mtx); | |
2898 | /* | |
2899 | * station info was already allocated and inserted before | |
2900 | * the association and should be available to us | |
2901 | */ | |
2902 | sta = sta_info_get(sdata, cbss->bssid); | |
2903 | if (WARN_ON(!sta)) { | |
2904 | mutex_unlock(&sdata->local->sta_mtx); | |
2905 | ret = false; | |
2906 | goto out; | |
2907 | } | |
2908 | ||
2909 | sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
2910 | ||
2911 | /* Set up internal HT/VHT capabilities */ | |
2912 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) | |
2913 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, | |
2914 | elems.ht_cap_elem, sta); | |
2915 | ||
2916 | if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) | |
2917 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
2918 | elems.vht_cap_elem, sta); | |
2919 | ||
2920 | /* | |
2921 | * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data | |
2922 | * in their association response, so ignore that data for our own | |
2923 | * configuration. If it changed since the last beacon, we'll get the | |
2924 | * next beacon and update then. | |
2925 | */ | |
2926 | ||
2927 | /* | |
2928 | * If an operating mode notification IE is present, override the | |
2929 | * NSS calculation (that would be done in rate_control_rate_init()) | |
2930 | * and use the # of streams from that element. | |
2931 | */ | |
2932 | if (elems.opmode_notif && | |
2933 | !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { | |
2934 | u8 nss; | |
2935 | ||
2936 | nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; | |
2937 | nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; | |
2938 | nss += 1; | |
2939 | sta->sta.rx_nss = nss; | |
2940 | } | |
2941 | ||
2942 | rate_control_rate_init(sta); | |
2943 | ||
2944 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) | |
2945 | set_sta_flag(sta, WLAN_STA_MFP); | |
2946 | ||
2947 | sta->sta.wme = elems.wmm_param; | |
2948 | ||
2949 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); | |
2950 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
2951 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
2952 | if (err) { | |
2953 | sdata_info(sdata, | |
2954 | "failed to move station %pM to desired state\n", | |
2955 | sta->sta.addr); | |
2956 | WARN_ON(__sta_info_destroy(sta)); | |
2957 | mutex_unlock(&sdata->local->sta_mtx); | |
2958 | ret = false; | |
2959 | goto out; | |
2960 | } | |
2961 | ||
2962 | mutex_unlock(&sdata->local->sta_mtx); | |
2963 | ||
2964 | /* | |
2965 | * Always handle WMM once after association regardless | |
2966 | * of the first value the AP uses. Setting -1 here has | |
2967 | * that effect because the AP values is an unsigned | |
2968 | * 4-bit value. | |
2969 | */ | |
2970 | ifmgd->wmm_last_param_set = -1; | |
2971 | ||
2972 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param) | |
2973 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, | |
2974 | elems.wmm_param_len); | |
2975 | else | |
2976 | ieee80211_set_wmm_default(sdata, false); | |
2977 | changed |= BSS_CHANGED_QOS; | |
2978 | ||
2979 | /* set AID and assoc capability, | |
2980 | * ieee80211_set_associated() will tell the driver */ | |
2981 | bss_conf->aid = aid; | |
2982 | bss_conf->assoc_capability = capab_info; | |
2983 | ieee80211_set_associated(sdata, cbss, changed); | |
2984 | ||
2985 | /* | |
2986 | * If we're using 4-addr mode, let the AP know that we're | |
2987 | * doing so, so that it can create the STA VLAN on its side | |
2988 | */ | |
2989 | if (ifmgd->use_4addr) | |
2990 | ieee80211_send_4addr_nullfunc(local, sdata); | |
2991 | ||
2992 | /* | |
2993 | * Start timer to probe the connection to the AP now. | |
2994 | * Also start the timer that will detect beacon loss. | |
2995 | */ | |
2996 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); | |
2997 | ieee80211_sta_reset_beacon_monitor(sdata); | |
2998 | ||
2999 | ret = true; | |
3000 | out: | |
3001 | kfree(bss_ies); | |
3002 | return ret; | |
3003 | } | |
3004 | ||
3005 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
3006 | struct ieee80211_mgmt *mgmt, | |
3007 | size_t len) | |
3008 | { | |
3009 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3010 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
3011 | u16 capab_info, status_code, aid; | |
3012 | struct ieee802_11_elems elems; | |
3013 | int ac, uapsd_queues = -1; | |
3014 | u8 *pos; | |
3015 | bool reassoc; | |
3016 | struct cfg80211_bss *bss; | |
3017 | ||
3018 | sdata_assert_lock(sdata); | |
3019 | ||
3020 | if (!assoc_data) | |
3021 | return; | |
3022 | if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) | |
3023 | return; | |
3024 | ||
3025 | /* | |
3026 | * AssocResp and ReassocResp have identical structure, so process both | |
3027 | * of them in this function. | |
3028 | */ | |
3029 | ||
3030 | if (len < 24 + 6) | |
3031 | return; | |
3032 | ||
3033 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); | |
3034 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
3035 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
3036 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
3037 | ||
3038 | sdata_info(sdata, | |
3039 | "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", | |
3040 | reassoc ? "Rea" : "A", mgmt->sa, | |
3041 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
3042 | ||
3043 | pos = mgmt->u.assoc_resp.variable; | |
3044 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); | |
3045 | ||
3046 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
3047 | elems.timeout_int && | |
3048 | elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
3049 | u32 tu, ms; | |
3050 | tu = le32_to_cpu(elems.timeout_int->value); | |
3051 | ms = tu * 1024 / 1000; | |
3052 | sdata_info(sdata, | |
3053 | "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", | |
3054 | mgmt->sa, tu, ms); | |
3055 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); | |
3056 | assoc_data->timeout_started = true; | |
3057 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
3058 | run_again(sdata, assoc_data->timeout); | |
3059 | return; | |
3060 | } | |
3061 | ||
3062 | bss = assoc_data->bss; | |
3063 | ||
3064 | if (status_code != WLAN_STATUS_SUCCESS) { | |
3065 | sdata_info(sdata, "%pM denied association (code=%d)\n", | |
3066 | mgmt->sa, status_code); | |
3067 | ieee80211_destroy_assoc_data(sdata, false); | |
3068 | } else { | |
3069 | if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { | |
3070 | /* oops -- internal error -- send timeout for now */ | |
3071 | ieee80211_destroy_assoc_data(sdata, false); | |
3072 | cfg80211_assoc_timeout(sdata->dev, bss); | |
3073 | return; | |
3074 | } | |
3075 | sdata_info(sdata, "associated\n"); | |
3076 | ||
3077 | /* | |
3078 | * destroy assoc_data afterwards, as otherwise an idle | |
3079 | * recalc after assoc_data is NULL but before associated | |
3080 | * is set can cause the interface to go idle | |
3081 | */ | |
3082 | ieee80211_destroy_assoc_data(sdata, true); | |
3083 | ||
3084 | /* get uapsd queues configuration */ | |
3085 | uapsd_queues = 0; | |
3086 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
3087 | if (sdata->tx_conf[ac].uapsd) | |
3088 | uapsd_queues |= BIT(ac); | |
3089 | } | |
3090 | ||
3091 | cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); | |
3092 | } | |
3093 | ||
3094 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
3095 | struct ieee80211_mgmt *mgmt, size_t len, | |
3096 | struct ieee80211_rx_status *rx_status, | |
3097 | struct ieee802_11_elems *elems) | |
3098 | { | |
3099 | struct ieee80211_local *local = sdata->local; | |
3100 | struct ieee80211_bss *bss; | |
3101 | struct ieee80211_channel *channel; | |
3102 | ||
3103 | sdata_assert_lock(sdata); | |
3104 | ||
3105 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
3106 | if (!channel) | |
3107 | return; | |
3108 | ||
3109 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
3110 | channel); | |
3111 | if (bss) { | |
3112 | sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; | |
3113 | ieee80211_rx_bss_put(local, bss); | |
3114 | } | |
3115 | } | |
3116 | ||
3117 | ||
3118 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, | |
3119 | struct sk_buff *skb) | |
3120 | { | |
3121 | struct ieee80211_mgmt *mgmt = (void *)skb->data; | |
3122 | struct ieee80211_if_managed *ifmgd; | |
3123 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; | |
3124 | size_t baselen, len = skb->len; | |
3125 | struct ieee802_11_elems elems; | |
3126 | ||
3127 | ifmgd = &sdata->u.mgd; | |
3128 | ||
3129 | sdata_assert_lock(sdata); | |
3130 | ||
3131 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) | |
3132 | return; /* ignore ProbeResp to foreign address */ | |
3133 | ||
3134 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
3135 | if (baselen > len) | |
3136 | return; | |
3137 | ||
3138 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
3139 | false, &elems); | |
3140 | ||
3141 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); | |
3142 | ||
3143 | if (ifmgd->associated && | |
3144 | ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) | |
3145 | ieee80211_reset_ap_probe(sdata); | |
3146 | ||
3147 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && | |
3148 | ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { | |
3149 | /* got probe response, continue with auth */ | |
3150 | sdata_info(sdata, "direct probe responded\n"); | |
3151 | ifmgd->auth_data->tries = 0; | |
3152 | ifmgd->auth_data->timeout = jiffies; | |
3153 | ifmgd->auth_data->timeout_started = true; | |
3154 | run_again(sdata, ifmgd->auth_data->timeout); | |
3155 | } | |
3156 | } | |
3157 | ||
3158 | /* | |
3159 | * This is the canonical list of information elements we care about, | |
3160 | * the filter code also gives us all changes to the Microsoft OUI | |
3161 | * (00:50:F2) vendor IE which is used for WMM which we need to track, | |
3162 | * as well as the DTPC IE (part of the Cisco OUI) used for signaling | |
3163 | * changes to requested client power. | |
3164 | * | |
3165 | * We implement beacon filtering in software since that means we can | |
3166 | * avoid processing the frame here and in cfg80211, and userspace | |
3167 | * will not be able to tell whether the hardware supports it or not. | |
3168 | * | |
3169 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
3170 | * add items it requires. It also needs to be able to tell us to | |
3171 | * look out for other vendor IEs. | |
3172 | */ | |
3173 | static const u64 care_about_ies = | |
3174 | (1ULL << WLAN_EID_COUNTRY) | | |
3175 | (1ULL << WLAN_EID_ERP_INFO) | | |
3176 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
3177 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
3178 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
3179 | (1ULL << WLAN_EID_HT_OPERATION); | |
3180 | ||
3181 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, | |
3182 | struct ieee80211_mgmt *mgmt, size_t len, | |
3183 | struct ieee80211_rx_status *rx_status) | |
3184 | { | |
3185 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3186 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; | |
3187 | size_t baselen; | |
3188 | struct ieee802_11_elems elems; | |
3189 | struct ieee80211_local *local = sdata->local; | |
3190 | struct ieee80211_chanctx_conf *chanctx_conf; | |
3191 | struct ieee80211_channel *chan; | |
3192 | struct sta_info *sta; | |
3193 | u32 changed = 0; | |
3194 | bool erp_valid; | |
3195 | u8 erp_value = 0; | |
3196 | u32 ncrc; | |
3197 | u8 *bssid; | |
3198 | u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
3199 | ||
3200 | sdata_assert_lock(sdata); | |
3201 | ||
3202 | /* Process beacon from the current BSS */ | |
3203 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
3204 | if (baselen > len) | |
3205 | return; | |
3206 | ||
3207 | rcu_read_lock(); | |
3208 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
3209 | if (!chanctx_conf) { | |
3210 | rcu_read_unlock(); | |
3211 | return; | |
3212 | } | |
3213 | ||
3214 | if (rx_status->freq != chanctx_conf->def.chan->center_freq) { | |
3215 | rcu_read_unlock(); | |
3216 | return; | |
3217 | } | |
3218 | chan = chanctx_conf->def.chan; | |
3219 | rcu_read_unlock(); | |
3220 | ||
3221 | if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && | |
3222 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { | |
3223 | ieee802_11_parse_elems(mgmt->u.beacon.variable, | |
3224 | len - baselen, false, &elems); | |
3225 | ||
3226 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); | |
3227 | if (elems.tim && !elems.parse_error) { | |
3228 | const struct ieee80211_tim_ie *tim_ie = elems.tim; | |
3229 | ifmgd->dtim_period = tim_ie->dtim_period; | |
3230 | } | |
3231 | ifmgd->have_beacon = true; | |
3232 | ifmgd->assoc_data->need_beacon = false; | |
3233 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { | |
3234 | sdata->vif.bss_conf.sync_tsf = | |
3235 | le64_to_cpu(mgmt->u.beacon.timestamp); | |
3236 | sdata->vif.bss_conf.sync_device_ts = | |
3237 | rx_status->device_timestamp; | |
3238 | if (elems.tim) | |
3239 | sdata->vif.bss_conf.sync_dtim_count = | |
3240 | elems.tim->dtim_count; | |
3241 | else | |
3242 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
3243 | } | |
3244 | /* continue assoc process */ | |
3245 | ifmgd->assoc_data->timeout = jiffies; | |
3246 | ifmgd->assoc_data->timeout_started = true; | |
3247 | run_again(sdata, ifmgd->assoc_data->timeout); | |
3248 | return; | |
3249 | } | |
3250 | ||
3251 | if (!ifmgd->associated || | |
3252 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) | |
3253 | return; | |
3254 | bssid = ifmgd->associated->bssid; | |
3255 | ||
3256 | /* Track average RSSI from the Beacon frames of the current AP */ | |
3257 | ifmgd->last_beacon_signal = rx_status->signal; | |
3258 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
3259 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
3260 | ifmgd->ave_beacon_signal = rx_status->signal * 16; | |
3261 | ifmgd->last_cqm_event_signal = 0; | |
3262 | ifmgd->count_beacon_signal = 1; | |
3263 | ifmgd->last_ave_beacon_signal = 0; | |
3264 | } else { | |
3265 | ifmgd->ave_beacon_signal = | |
3266 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
3267 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
3268 | ifmgd->ave_beacon_signal) / 16; | |
3269 | ifmgd->count_beacon_signal++; | |
3270 | } | |
3271 | ||
3272 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && | |
3273 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { | |
3274 | int sig = ifmgd->ave_beacon_signal; | |
3275 | int last_sig = ifmgd->last_ave_beacon_signal; | |
3276 | ||
3277 | /* | |
3278 | * if signal crosses either of the boundaries, invoke callback | |
3279 | * with appropriate parameters | |
3280 | */ | |
3281 | if (sig > ifmgd->rssi_max_thold && | |
3282 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { | |
3283 | ifmgd->last_ave_beacon_signal = sig; | |
3284 | drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH); | |
3285 | } else if (sig < ifmgd->rssi_min_thold && | |
3286 | (last_sig >= ifmgd->rssi_max_thold || | |
3287 | last_sig == 0)) { | |
3288 | ifmgd->last_ave_beacon_signal = sig; | |
3289 | drv_rssi_callback(local, sdata, RSSI_EVENT_LOW); | |
3290 | } | |
3291 | } | |
3292 | ||
3293 | if (bss_conf->cqm_rssi_thold && | |
3294 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && | |
3295 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { | |
3296 | int sig = ifmgd->ave_beacon_signal / 16; | |
3297 | int last_event = ifmgd->last_cqm_event_signal; | |
3298 | int thold = bss_conf->cqm_rssi_thold; | |
3299 | int hyst = bss_conf->cqm_rssi_hyst; | |
3300 | if (sig < thold && | |
3301 | (last_event == 0 || sig < last_event - hyst)) { | |
3302 | ifmgd->last_cqm_event_signal = sig; | |
3303 | ieee80211_cqm_rssi_notify( | |
3304 | &sdata->vif, | |
3305 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
3306 | GFP_KERNEL); | |
3307 | } else if (sig > thold && | |
3308 | (last_event == 0 || sig > last_event + hyst)) { | |
3309 | ifmgd->last_cqm_event_signal = sig; | |
3310 | ieee80211_cqm_rssi_notify( | |
3311 | &sdata->vif, | |
3312 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
3313 | GFP_KERNEL); | |
3314 | } | |
3315 | } | |
3316 | ||
3317 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { | |
3318 | mlme_dbg_ratelimited(sdata, | |
3319 | "cancelling AP probe due to a received beacon\n"); | |
3320 | ieee80211_reset_ap_probe(sdata); | |
3321 | } | |
3322 | ||
3323 | /* | |
3324 | * Push the beacon loss detection into the future since | |
3325 | * we are processing a beacon from the AP just now. | |
3326 | */ | |
3327 | ieee80211_sta_reset_beacon_monitor(sdata); | |
3328 | ||
3329 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); | |
3330 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
3331 | len - baselen, false, &elems, | |
3332 | care_about_ies, ncrc); | |
3333 | ||
3334 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { | |
3335 | bool directed_tim = ieee80211_check_tim(elems.tim, | |
3336 | elems.tim_len, | |
3337 | ifmgd->aid); | |
3338 | if (directed_tim) { | |
3339 | if (local->hw.conf.dynamic_ps_timeout > 0) { | |
3340 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
3341 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
3342 | ieee80211_hw_config(local, | |
3343 | IEEE80211_CONF_CHANGE_PS); | |
3344 | } | |
3345 | ieee80211_send_nullfunc(local, sdata, 0); | |
3346 | } else if (!local->pspolling && sdata->u.mgd.powersave) { | |
3347 | local->pspolling = true; | |
3348 | ||
3349 | /* | |
3350 | * Here is assumed that the driver will be | |
3351 | * able to send ps-poll frame and receive a | |
3352 | * response even though power save mode is | |
3353 | * enabled, but some drivers might require | |
3354 | * to disable power save here. This needs | |
3355 | * to be investigated. | |
3356 | */ | |
3357 | ieee80211_send_pspoll(local, sdata); | |
3358 | } | |
3359 | } | |
3360 | } | |
3361 | ||
3362 | if (sdata->vif.p2p) { | |
3363 | struct ieee80211_p2p_noa_attr noa = {}; | |
3364 | int ret; | |
3365 | ||
3366 | ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, | |
3367 | len - baselen, | |
3368 | IEEE80211_P2P_ATTR_ABSENCE_NOTICE, | |
3369 | (u8 *) &noa, sizeof(noa)); | |
3370 | if (ret >= 2) { | |
3371 | if (sdata->u.mgd.p2p_noa_index != noa.index) { | |
3372 | /* valid noa_attr and index changed */ | |
3373 | sdata->u.mgd.p2p_noa_index = noa.index; | |
3374 | memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); | |
3375 | changed |= BSS_CHANGED_P2P_PS; | |
3376 | /* | |
3377 | * make sure we update all information, the CRC | |
3378 | * mechanism doesn't look at P2P attributes. | |
3379 | */ | |
3380 | ifmgd->beacon_crc_valid = false; | |
3381 | } | |
3382 | } else if (sdata->u.mgd.p2p_noa_index != -1) { | |
3383 | /* noa_attr not found and we had valid noa_attr before */ | |
3384 | sdata->u.mgd.p2p_noa_index = -1; | |
3385 | memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); | |
3386 | changed |= BSS_CHANGED_P2P_PS; | |
3387 | ifmgd->beacon_crc_valid = false; | |
3388 | } | |
3389 | } | |
3390 | ||
3391 | if (ifmgd->csa_waiting_bcn) | |
3392 | ieee80211_chswitch_post_beacon(sdata); | |
3393 | ||
3394 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) | |
3395 | return; | |
3396 | ifmgd->beacon_crc = ncrc; | |
3397 | ifmgd->beacon_crc_valid = true; | |
3398 | ||
3399 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); | |
3400 | ||
3401 | ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, | |
3402 | rx_status->device_timestamp, | |
3403 | &elems, true); | |
3404 | ||
3405 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && | |
3406 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, | |
3407 | elems.wmm_param_len)) | |
3408 | changed |= BSS_CHANGED_QOS; | |
3409 | ||
3410 | /* | |
3411 | * If we haven't had a beacon before, tell the driver about the | |
3412 | * DTIM period (and beacon timing if desired) now. | |
3413 | */ | |
3414 | if (!ifmgd->have_beacon) { | |
3415 | /* a few bogus AP send dtim_period = 0 or no TIM IE */ | |
3416 | if (elems.tim) | |
3417 | bss_conf->dtim_period = elems.tim->dtim_period ?: 1; | |
3418 | else | |
3419 | bss_conf->dtim_period = 1; | |
3420 | ||
3421 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { | |
3422 | sdata->vif.bss_conf.sync_tsf = | |
3423 | le64_to_cpu(mgmt->u.beacon.timestamp); | |
3424 | sdata->vif.bss_conf.sync_device_ts = | |
3425 | rx_status->device_timestamp; | |
3426 | if (elems.tim) | |
3427 | sdata->vif.bss_conf.sync_dtim_count = | |
3428 | elems.tim->dtim_count; | |
3429 | else | |
3430 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
3431 | } | |
3432 | ||
3433 | changed |= BSS_CHANGED_BEACON_INFO; | |
3434 | ifmgd->have_beacon = true; | |
3435 | ||
3436 | mutex_lock(&local->iflist_mtx); | |
3437 | ieee80211_recalc_ps(local, -1); | |
3438 | mutex_unlock(&local->iflist_mtx); | |
3439 | ||
3440 | ieee80211_recalc_ps_vif(sdata); | |
3441 | } | |
3442 | ||
3443 | if (elems.erp_info) { | |
3444 | erp_valid = true; | |
3445 | erp_value = elems.erp_info[0]; | |
3446 | } else { | |
3447 | erp_valid = false; | |
3448 | } | |
3449 | changed |= ieee80211_handle_bss_capability(sdata, | |
3450 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
3451 | erp_valid, erp_value); | |
3452 | ||
3453 | mutex_lock(&local->sta_mtx); | |
3454 | sta = sta_info_get(sdata, bssid); | |
3455 | ||
3456 | if (ieee80211_config_bw(sdata, sta, | |
3457 | elems.ht_cap_elem, elems.ht_operation, | |
3458 | elems.vht_operation, bssid, &changed)) { | |
3459 | mutex_unlock(&local->sta_mtx); | |
3460 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
3461 | WLAN_REASON_DEAUTH_LEAVING, | |
3462 | true, deauth_buf); | |
3463 | cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf, | |
3464 | sizeof(deauth_buf)); | |
3465 | return; | |
3466 | } | |
3467 | ||
3468 | if (sta && elems.opmode_notif) | |
3469 | ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, | |
3470 | rx_status->band, true); | |
3471 | mutex_unlock(&local->sta_mtx); | |
3472 | ||
3473 | changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, | |
3474 | elems.country_elem, | |
3475 | elems.country_elem_len, | |
3476 | elems.pwr_constr_elem, | |
3477 | elems.cisco_dtpc_elem); | |
3478 | ||
3479 | ieee80211_bss_info_change_notify(sdata, changed); | |
3480 | } | |
3481 | ||
3482 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
3483 | struct sk_buff *skb) | |
3484 | { | |
3485 | struct ieee80211_rx_status *rx_status; | |
3486 | struct ieee80211_mgmt *mgmt; | |
3487 | u16 fc; | |
3488 | struct ieee802_11_elems elems; | |
3489 | int ies_len; | |
3490 | ||
3491 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
3492 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
3493 | fc = le16_to_cpu(mgmt->frame_control); | |
3494 | ||
3495 | sdata_lock(sdata); | |
3496 | ||
3497 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3498 | case IEEE80211_STYPE_BEACON: | |
3499 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); | |
3500 | break; | |
3501 | case IEEE80211_STYPE_PROBE_RESP: | |
3502 | ieee80211_rx_mgmt_probe_resp(sdata, skb); | |
3503 | break; | |
3504 | case IEEE80211_STYPE_AUTH: | |
3505 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
3506 | break; | |
3507 | case IEEE80211_STYPE_DEAUTH: | |
3508 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
3509 | break; | |
3510 | case IEEE80211_STYPE_DISASSOC: | |
3511 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
3512 | break; | |
3513 | case IEEE80211_STYPE_ASSOC_RESP: | |
3514 | case IEEE80211_STYPE_REASSOC_RESP: | |
3515 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); | |
3516 | break; | |
3517 | case IEEE80211_STYPE_ACTION: | |
3518 | if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { | |
3519 | ies_len = skb->len - | |
3520 | offsetof(struct ieee80211_mgmt, | |
3521 | u.action.u.chan_switch.variable); | |
3522 | ||
3523 | if (ies_len < 0) | |
3524 | break; | |
3525 | ||
3526 | ieee802_11_parse_elems( | |
3527 | mgmt->u.action.u.chan_switch.variable, | |
3528 | ies_len, true, &elems); | |
3529 | ||
3530 | if (elems.parse_error) | |
3531 | break; | |
3532 | ||
3533 | ieee80211_sta_process_chanswitch(sdata, | |
3534 | rx_status->mactime, | |
3535 | rx_status->device_timestamp, | |
3536 | &elems, false); | |
3537 | } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { | |
3538 | ies_len = skb->len - | |
3539 | offsetof(struct ieee80211_mgmt, | |
3540 | u.action.u.ext_chan_switch.variable); | |
3541 | ||
3542 | if (ies_len < 0) | |
3543 | break; | |
3544 | ||
3545 | ieee802_11_parse_elems( | |
3546 | mgmt->u.action.u.ext_chan_switch.variable, | |
3547 | ies_len, true, &elems); | |
3548 | ||
3549 | if (elems.parse_error) | |
3550 | break; | |
3551 | ||
3552 | /* for the handling code pretend this was also an IE */ | |
3553 | elems.ext_chansw_ie = | |
3554 | &mgmt->u.action.u.ext_chan_switch.data; | |
3555 | ||
3556 | ieee80211_sta_process_chanswitch(sdata, | |
3557 | rx_status->mactime, | |
3558 | rx_status->device_timestamp, | |
3559 | &elems, false); | |
3560 | } | |
3561 | break; | |
3562 | } | |
3563 | sdata_unlock(sdata); | |
3564 | } | |
3565 | ||
3566 | static void ieee80211_sta_timer(unsigned long data) | |
3567 | { | |
3568 | struct ieee80211_sub_if_data *sdata = | |
3569 | (struct ieee80211_sub_if_data *) data; | |
3570 | ||
3571 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
3572 | } | |
3573 | ||
3574 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, | |
3575 | u8 *bssid, u8 reason, bool tx) | |
3576 | { | |
3577 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
3578 | ||
3579 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, | |
3580 | tx, frame_buf); | |
3581 | ||
3582 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
3583 | IEEE80211_DEAUTH_FRAME_LEN); | |
3584 | } | |
3585 | ||
3586 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) | |
3587 | { | |
3588 | struct ieee80211_local *local = sdata->local; | |
3589 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3590 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; | |
3591 | u32 tx_flags = 0; | |
3592 | ||
3593 | sdata_assert_lock(sdata); | |
3594 | ||
3595 | if (WARN_ON_ONCE(!auth_data)) | |
3596 | return -EINVAL; | |
3597 | ||
3598 | auth_data->tries++; | |
3599 | ||
3600 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { | |
3601 | sdata_info(sdata, "authentication with %pM timed out\n", | |
3602 | auth_data->bss->bssid); | |
3603 | ||
3604 | /* | |
3605 | * Most likely AP is not in the range so remove the | |
3606 | * bss struct for that AP. | |
3607 | */ | |
3608 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); | |
3609 | ||
3610 | return -ETIMEDOUT; | |
3611 | } | |
3612 | ||
3613 | drv_mgd_prepare_tx(local, sdata); | |
3614 | ||
3615 | if (auth_data->bss->proberesp_ies) { | |
3616 | u16 trans = 1; | |
3617 | u16 status = 0; | |
3618 | ||
3619 | sdata_info(sdata, "send auth to %pM (try %d/%d)\n", | |
3620 | auth_data->bss->bssid, auth_data->tries, | |
3621 | IEEE80211_AUTH_MAX_TRIES); | |
3622 | ||
3623 | auth_data->expected_transaction = 2; | |
3624 | ||
3625 | if (auth_data->algorithm == WLAN_AUTH_SAE) { | |
3626 | trans = auth_data->sae_trans; | |
3627 | status = auth_data->sae_status; | |
3628 | auth_data->expected_transaction = trans; | |
3629 | } | |
3630 | ||
3631 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) | |
3632 | tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
3633 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
3634 | ||
3635 | ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, | |
3636 | auth_data->data, auth_data->data_len, | |
3637 | auth_data->bss->bssid, | |
3638 | auth_data->bss->bssid, NULL, 0, 0, | |
3639 | tx_flags); | |
3640 | } else { | |
3641 | const u8 *ssidie; | |
3642 | ||
3643 | sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", | |
3644 | auth_data->bss->bssid, auth_data->tries, | |
3645 | IEEE80211_AUTH_MAX_TRIES); | |
3646 | ||
3647 | rcu_read_lock(); | |
3648 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); | |
3649 | if (!ssidie) { | |
3650 | rcu_read_unlock(); | |
3651 | return -EINVAL; | |
3652 | } | |
3653 | /* | |
3654 | * Direct probe is sent to broadcast address as some APs | |
3655 | * will not answer to direct packet in unassociated state. | |
3656 | */ | |
3657 | ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL, | |
3658 | ssidie + 2, ssidie[1], | |
3659 | NULL, 0, (u32) -1, true, 0, | |
3660 | auth_data->bss->channel, false); | |
3661 | rcu_read_unlock(); | |
3662 | } | |
3663 | ||
3664 | if (tx_flags == 0) { | |
3665 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
3666 | auth_data->timeout_started = true; | |
3667 | run_again(sdata, auth_data->timeout); | |
3668 | } else { | |
3669 | auth_data->timeout = | |
3670 | round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); | |
3671 | auth_data->timeout_started = true; | |
3672 | run_again(sdata, auth_data->timeout); | |
3673 | } | |
3674 | ||
3675 | return 0; | |
3676 | } | |
3677 | ||
3678 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) | |
3679 | { | |
3680 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
3681 | struct ieee80211_local *local = sdata->local; | |
3682 | ||
3683 | sdata_assert_lock(sdata); | |
3684 | ||
3685 | assoc_data->tries++; | |
3686 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { | |
3687 | sdata_info(sdata, "association with %pM timed out\n", | |
3688 | assoc_data->bss->bssid); | |
3689 | ||
3690 | /* | |
3691 | * Most likely AP is not in the range so remove the | |
3692 | * bss struct for that AP. | |
3693 | */ | |
3694 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); | |
3695 | ||
3696 | return -ETIMEDOUT; | |
3697 | } | |
3698 | ||
3699 | sdata_info(sdata, "associate with %pM (try %d/%d)\n", | |
3700 | assoc_data->bss->bssid, assoc_data->tries, | |
3701 | IEEE80211_ASSOC_MAX_TRIES); | |
3702 | ieee80211_send_assoc(sdata); | |
3703 | ||
3704 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { | |
3705 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
3706 | assoc_data->timeout_started = true; | |
3707 | run_again(sdata, assoc_data->timeout); | |
3708 | } else { | |
3709 | assoc_data->timeout = | |
3710 | round_jiffies_up(jiffies + | |
3711 | IEEE80211_ASSOC_TIMEOUT_LONG); | |
3712 | assoc_data->timeout_started = true; | |
3713 | run_again(sdata, assoc_data->timeout); | |
3714 | } | |
3715 | ||
3716 | return 0; | |
3717 | } | |
3718 | ||
3719 | void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, | |
3720 | __le16 fc, bool acked) | |
3721 | { | |
3722 | struct ieee80211_local *local = sdata->local; | |
3723 | ||
3724 | sdata->u.mgd.status_fc = fc; | |
3725 | sdata->u.mgd.status_acked = acked; | |
3726 | sdata->u.mgd.status_received = true; | |
3727 | ||
3728 | ieee80211_queue_work(&local->hw, &sdata->work); | |
3729 | } | |
3730 | ||
3731 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) | |
3732 | { | |
3733 | struct ieee80211_local *local = sdata->local; | |
3734 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3735 | ||
3736 | sdata_lock(sdata); | |
3737 | ||
3738 | if (ifmgd->status_received) { | |
3739 | __le16 fc = ifmgd->status_fc; | |
3740 | bool status_acked = ifmgd->status_acked; | |
3741 | ||
3742 | ifmgd->status_received = false; | |
3743 | if (ifmgd->auth_data && | |
3744 | (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) { | |
3745 | if (status_acked) { | |
3746 | ifmgd->auth_data->timeout = | |
3747 | jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; | |
3748 | run_again(sdata, ifmgd->auth_data->timeout); | |
3749 | } else { | |
3750 | ifmgd->auth_data->timeout = jiffies - 1; | |
3751 | } | |
3752 | ifmgd->auth_data->timeout_started = true; | |
3753 | } else if (ifmgd->assoc_data && | |
3754 | (ieee80211_is_assoc_req(fc) || | |
3755 | ieee80211_is_reassoc_req(fc))) { | |
3756 | if (status_acked) { | |
3757 | ifmgd->assoc_data->timeout = | |
3758 | jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; | |
3759 | run_again(sdata, ifmgd->assoc_data->timeout); | |
3760 | } else { | |
3761 | ifmgd->assoc_data->timeout = jiffies - 1; | |
3762 | } | |
3763 | ifmgd->assoc_data->timeout_started = true; | |
3764 | } | |
3765 | } | |
3766 | ||
3767 | if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && | |
3768 | time_after(jiffies, ifmgd->auth_data->timeout)) { | |
3769 | if (ifmgd->auth_data->done) { | |
3770 | /* | |
3771 | * ok ... we waited for assoc but userspace didn't, | |
3772 | * so let's just kill the auth data | |
3773 | */ | |
3774 | ieee80211_destroy_auth_data(sdata, false); | |
3775 | } else if (ieee80211_probe_auth(sdata)) { | |
3776 | u8 bssid[ETH_ALEN]; | |
3777 | ||
3778 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
3779 | ||
3780 | ieee80211_destroy_auth_data(sdata, false); | |
3781 | ||
3782 | cfg80211_auth_timeout(sdata->dev, bssid); | |
3783 | } | |
3784 | } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) | |
3785 | run_again(sdata, ifmgd->auth_data->timeout); | |
3786 | ||
3787 | if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && | |
3788 | time_after(jiffies, ifmgd->assoc_data->timeout)) { | |
3789 | if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || | |
3790 | ieee80211_do_assoc(sdata)) { | |
3791 | struct cfg80211_bss *bss = ifmgd->assoc_data->bss; | |
3792 | ||
3793 | ieee80211_destroy_assoc_data(sdata, false); | |
3794 | cfg80211_assoc_timeout(sdata->dev, bss); | |
3795 | } | |
3796 | } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) | |
3797 | run_again(sdata, ifmgd->assoc_data->timeout); | |
3798 | ||
3799 | if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && | |
3800 | ifmgd->associated) { | |
3801 | u8 bssid[ETH_ALEN]; | |
3802 | int max_tries; | |
3803 | ||
3804 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
3805 | ||
3806 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) | |
3807 | max_tries = max_nullfunc_tries; | |
3808 | else | |
3809 | max_tries = max_probe_tries; | |
3810 | ||
3811 | /* ACK received for nullfunc probing frame */ | |
3812 | if (!ifmgd->probe_send_count) | |
3813 | ieee80211_reset_ap_probe(sdata); | |
3814 | else if (ifmgd->nullfunc_failed) { | |
3815 | if (ifmgd->probe_send_count < max_tries) { | |
3816 | mlme_dbg(sdata, | |
3817 | "No ack for nullfunc frame to AP %pM, try %d/%i\n", | |
3818 | bssid, ifmgd->probe_send_count, | |
3819 | max_tries); | |
3820 | ieee80211_mgd_probe_ap_send(sdata); | |
3821 | } else { | |
3822 | mlme_dbg(sdata, | |
3823 | "No ack for nullfunc frame to AP %pM, disconnecting.\n", | |
3824 | bssid); | |
3825 | ieee80211_sta_connection_lost(sdata, bssid, | |
3826 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
3827 | false); | |
3828 | } | |
3829 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) | |
3830 | run_again(sdata, ifmgd->probe_timeout); | |
3831 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { | |
3832 | mlme_dbg(sdata, | |
3833 | "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", | |
3834 | bssid, probe_wait_ms); | |
3835 | ieee80211_sta_connection_lost(sdata, bssid, | |
3836 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); | |
3837 | } else if (ifmgd->probe_send_count < max_tries) { | |
3838 | mlme_dbg(sdata, | |
3839 | "No probe response from AP %pM after %dms, try %d/%i\n", | |
3840 | bssid, probe_wait_ms, | |
3841 | ifmgd->probe_send_count, max_tries); | |
3842 | ieee80211_mgd_probe_ap_send(sdata); | |
3843 | } else { | |
3844 | /* | |
3845 | * We actually lost the connection ... or did we? | |
3846 | * Let's make sure! | |
3847 | */ | |
3848 | wiphy_debug(local->hw.wiphy, | |
3849 | "%s: No probe response from AP %pM" | |
3850 | " after %dms, disconnecting.\n", | |
3851 | sdata->name, | |
3852 | bssid, probe_wait_ms); | |
3853 | ||
3854 | ieee80211_sta_connection_lost(sdata, bssid, | |
3855 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); | |
3856 | } | |
3857 | } | |
3858 | ||
3859 | sdata_unlock(sdata); | |
3860 | } | |
3861 | ||
3862 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) | |
3863 | { | |
3864 | struct ieee80211_sub_if_data *sdata = | |
3865 | (struct ieee80211_sub_if_data *) data; | |
3866 | struct ieee80211_local *local = sdata->local; | |
3867 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3868 | ||
3869 | if (local->quiescing) | |
3870 | return; | |
3871 | ||
3872 | if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) | |
3873 | return; | |
3874 | ||
3875 | sdata->u.mgd.connection_loss = false; | |
3876 | ieee80211_queue_work(&sdata->local->hw, | |
3877 | &sdata->u.mgd.beacon_connection_loss_work); | |
3878 | } | |
3879 | ||
3880 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
3881 | { | |
3882 | struct ieee80211_sub_if_data *sdata = | |
3883 | (struct ieee80211_sub_if_data *) data; | |
3884 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3885 | struct ieee80211_local *local = sdata->local; | |
3886 | ||
3887 | if (local->quiescing) | |
3888 | return; | |
3889 | ||
3890 | if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) | |
3891 | return; | |
3892 | ||
3893 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); | |
3894 | } | |
3895 | ||
3896 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
3897 | { | |
3898 | struct ieee80211_sub_if_data *sdata = | |
3899 | container_of(work, struct ieee80211_sub_if_data, | |
3900 | u.mgd.monitor_work); | |
3901 | ||
3902 | ieee80211_mgd_probe_ap(sdata, false); | |
3903 | } | |
3904 | ||
3905 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) | |
3906 | { | |
3907 | u32 flags; | |
3908 | ||
3909 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { | |
3910 | __ieee80211_stop_poll(sdata); | |
3911 | ||
3912 | /* let's probe the connection once */ | |
3913 | flags = sdata->local->hw.flags; | |
3914 | if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) | |
3915 | ieee80211_queue_work(&sdata->local->hw, | |
3916 | &sdata->u.mgd.monitor_work); | |
3917 | /* and do all the other regular work too */ | |
3918 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
3919 | } | |
3920 | } | |
3921 | ||
3922 | #ifdef CONFIG_PM | |
3923 | void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) | |
3924 | { | |
3925 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3926 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
3927 | ||
3928 | sdata_lock(sdata); | |
3929 | ||
3930 | if (ifmgd->auth_data || ifmgd->assoc_data) { | |
3931 | const u8 *bssid = ifmgd->auth_data ? | |
3932 | ifmgd->auth_data->bss->bssid : | |
3933 | ifmgd->assoc_data->bss->bssid; | |
3934 | ||
3935 | /* | |
3936 | * If we are trying to authenticate / associate while suspending, | |
3937 | * cfg80211 won't know and won't actually abort those attempts, | |
3938 | * thus we need to do that ourselves. | |
3939 | */ | |
3940 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
3941 | IEEE80211_STYPE_DEAUTH, | |
3942 | WLAN_REASON_DEAUTH_LEAVING, | |
3943 | false, frame_buf); | |
3944 | if (ifmgd->assoc_data) | |
3945 | ieee80211_destroy_assoc_data(sdata, false); | |
3946 | if (ifmgd->auth_data) | |
3947 | ieee80211_destroy_auth_data(sdata, false); | |
3948 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
3949 | IEEE80211_DEAUTH_FRAME_LEN); | |
3950 | } | |
3951 | ||
3952 | sdata_unlock(sdata); | |
3953 | } | |
3954 | ||
3955 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
3956 | { | |
3957 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3958 | ||
3959 | sdata_lock(sdata); | |
3960 | if (!ifmgd->associated) { | |
3961 | sdata_unlock(sdata); | |
3962 | return; | |
3963 | } | |
3964 | ||
3965 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { | |
3966 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; | |
3967 | mlme_dbg(sdata, "driver requested disconnect after resume\n"); | |
3968 | ieee80211_sta_connection_lost(sdata, | |
3969 | ifmgd->associated->bssid, | |
3970 | WLAN_REASON_UNSPECIFIED, | |
3971 | true); | |
3972 | sdata_unlock(sdata); | |
3973 | return; | |
3974 | } | |
3975 | sdata_unlock(sdata); | |
3976 | } | |
3977 | #endif | |
3978 | ||
3979 | /* interface setup */ | |
3980 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
3981 | { | |
3982 | struct ieee80211_if_managed *ifmgd; | |
3983 | ||
3984 | ifmgd = &sdata->u.mgd; | |
3985 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); | |
3986 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
3987 | INIT_WORK(&ifmgd->beacon_connection_loss_work, | |
3988 | ieee80211_beacon_connection_loss_work); | |
3989 | INIT_WORK(&ifmgd->csa_connection_drop_work, | |
3990 | ieee80211_csa_connection_drop_work); | |
3991 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); | |
3992 | INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, | |
3993 | ieee80211_tdls_peer_del_work); | |
3994 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, | |
3995 | (unsigned long) sdata); | |
3996 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, | |
3997 | (unsigned long) sdata); | |
3998 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
3999 | (unsigned long) sdata); | |
4000 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, | |
4001 | (unsigned long) sdata); | |
4002 | INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, | |
4003 | ieee80211_sta_handle_tspec_ac_params_wk); | |
4004 | ||
4005 | ifmgd->flags = 0; | |
4006 | ifmgd->powersave = sdata->wdev.ps; | |
4007 | ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; | |
4008 | ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; | |
4009 | ifmgd->p2p_noa_index = -1; | |
4010 | ||
4011 | if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) | |
4012 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
4013 | else | |
4014 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
4015 | ||
4016 | /* Setup TDLS data */ | |
4017 | spin_lock_init(&ifmgd->teardown_lock); | |
4018 | ifmgd->teardown_skb = NULL; | |
4019 | ifmgd->orig_teardown_skb = NULL; | |
4020 | } | |
4021 | ||
4022 | /* scan finished notification */ | |
4023 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
4024 | { | |
4025 | struct ieee80211_sub_if_data *sdata; | |
4026 | ||
4027 | /* Restart STA timers */ | |
4028 | rcu_read_lock(); | |
4029 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4030 | if (ieee80211_sdata_running(sdata)) | |
4031 | ieee80211_restart_sta_timer(sdata); | |
4032 | } | |
4033 | rcu_read_unlock(); | |
4034 | } | |
4035 | ||
4036 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
4037 | unsigned long data, void *dummy) | |
4038 | { | |
4039 | s32 latency_usec = (s32) data; | |
4040 | struct ieee80211_local *local = | |
4041 | container_of(nb, struct ieee80211_local, | |
4042 | network_latency_notifier); | |
4043 | ||
4044 | mutex_lock(&local->iflist_mtx); | |
4045 | ieee80211_recalc_ps(local, latency_usec); | |
4046 | mutex_unlock(&local->iflist_mtx); | |
4047 | ||
4048 | return NOTIFY_OK; | |
4049 | } | |
4050 | ||
4051 | static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, | |
4052 | struct cfg80211_bss *cbss) | |
4053 | { | |
4054 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4055 | const u8 *ht_cap_ie, *vht_cap_ie; | |
4056 | const struct ieee80211_ht_cap *ht_cap; | |
4057 | const struct ieee80211_vht_cap *vht_cap; | |
4058 | u8 chains = 1; | |
4059 | ||
4060 | if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) | |
4061 | return chains; | |
4062 | ||
4063 | ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); | |
4064 | if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { | |
4065 | ht_cap = (void *)(ht_cap_ie + 2); | |
4066 | chains = ieee80211_mcs_to_chains(&ht_cap->mcs); | |
4067 | /* | |
4068 | * TODO: use "Tx Maximum Number Spatial Streams Supported" and | |
4069 | * "Tx Unequal Modulation Supported" fields. | |
4070 | */ | |
4071 | } | |
4072 | ||
4073 | if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) | |
4074 | return chains; | |
4075 | ||
4076 | vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); | |
4077 | if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { | |
4078 | u8 nss; | |
4079 | u16 tx_mcs_map; | |
4080 | ||
4081 | vht_cap = (void *)(vht_cap_ie + 2); | |
4082 | tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); | |
4083 | for (nss = 8; nss > 0; nss--) { | |
4084 | if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != | |
4085 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
4086 | break; | |
4087 | } | |
4088 | /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ | |
4089 | chains = max(chains, nss); | |
4090 | } | |
4091 | ||
4092 | return chains; | |
4093 | } | |
4094 | ||
4095 | static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, | |
4096 | struct cfg80211_bss *cbss) | |
4097 | { | |
4098 | struct ieee80211_local *local = sdata->local; | |
4099 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4100 | const struct ieee80211_ht_cap *ht_cap = NULL; | |
4101 | const struct ieee80211_ht_operation *ht_oper = NULL; | |
4102 | const struct ieee80211_vht_operation *vht_oper = NULL; | |
4103 | struct ieee80211_supported_band *sband; | |
4104 | struct cfg80211_chan_def chandef; | |
4105 | int ret; | |
4106 | ||
4107 | sband = local->hw.wiphy->bands[cbss->channel->band]; | |
4108 | ||
4109 | ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | | |
4110 | IEEE80211_STA_DISABLE_80P80MHZ | | |
4111 | IEEE80211_STA_DISABLE_160MHZ); | |
4112 | ||
4113 | rcu_read_lock(); | |
4114 | ||
4115 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && | |
4116 | sband->ht_cap.ht_supported) { | |
4117 | const u8 *ht_oper_ie, *ht_cap_ie; | |
4118 | ||
4119 | ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); | |
4120 | if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) | |
4121 | ht_oper = (void *)(ht_oper_ie + 2); | |
4122 | ||
4123 | ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); | |
4124 | if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) | |
4125 | ht_cap = (void *)(ht_cap_ie + 2); | |
4126 | ||
4127 | if (!ht_cap) { | |
4128 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4129 | ht_oper = NULL; | |
4130 | } | |
4131 | } | |
4132 | ||
4133 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && | |
4134 | sband->vht_cap.vht_supported) { | |
4135 | const u8 *vht_oper_ie, *vht_cap; | |
4136 | ||
4137 | vht_oper_ie = ieee80211_bss_get_ie(cbss, | |
4138 | WLAN_EID_VHT_OPERATION); | |
4139 | if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) | |
4140 | vht_oper = (void *)(vht_oper_ie + 2); | |
4141 | if (vht_oper && !ht_oper) { | |
4142 | vht_oper = NULL; | |
4143 | sdata_info(sdata, | |
4144 | "AP advertised VHT without HT, disabling both\n"); | |
4145 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4146 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4147 | } | |
4148 | ||
4149 | vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); | |
4150 | if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { | |
4151 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4152 | vht_oper = NULL; | |
4153 | } | |
4154 | } | |
4155 | ||
4156 | ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, | |
4157 | cbss->channel, | |
4158 | ht_cap, ht_oper, vht_oper, | |
4159 | &chandef, false); | |
4160 | ||
4161 | sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), | |
4162 | local->rx_chains); | |
4163 | ||
4164 | rcu_read_unlock(); | |
4165 | ||
4166 | /* will change later if needed */ | |
4167 | sdata->smps_mode = IEEE80211_SMPS_OFF; | |
4168 | ||
4169 | mutex_lock(&local->mtx); | |
4170 | /* | |
4171 | * If this fails (possibly due to channel context sharing | |
4172 | * on incompatible channels, e.g. 80+80 and 160 sharing the | |
4173 | * same control channel) try to use a smaller bandwidth. | |
4174 | */ | |
4175 | ret = ieee80211_vif_use_channel(sdata, &chandef, | |
4176 | IEEE80211_CHANCTX_SHARED); | |
4177 | ||
4178 | /* don't downgrade for 5 and 10 MHz channels, though. */ | |
4179 | if (chandef.width == NL80211_CHAN_WIDTH_5 || | |
4180 | chandef.width == NL80211_CHAN_WIDTH_10) | |
4181 | goto out; | |
4182 | ||
4183 | while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { | |
4184 | ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); | |
4185 | ret = ieee80211_vif_use_channel(sdata, &chandef, | |
4186 | IEEE80211_CHANCTX_SHARED); | |
4187 | } | |
4188 | out: | |
4189 | mutex_unlock(&local->mtx); | |
4190 | return ret; | |
4191 | } | |
4192 | ||
4193 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, | |
4194 | struct cfg80211_bss *cbss, bool assoc) | |
4195 | { | |
4196 | struct ieee80211_local *local = sdata->local; | |
4197 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4198 | struct ieee80211_bss *bss = (void *)cbss->priv; | |
4199 | struct sta_info *new_sta = NULL; | |
4200 | bool have_sta = false; | |
4201 | int err; | |
4202 | ||
4203 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) | |
4204 | return -EINVAL; | |
4205 | ||
4206 | if (assoc) { | |
4207 | rcu_read_lock(); | |
4208 | have_sta = sta_info_get(sdata, cbss->bssid); | |
4209 | rcu_read_unlock(); | |
4210 | } | |
4211 | ||
4212 | if (!have_sta) { | |
4213 | new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); | |
4214 | if (!new_sta) | |
4215 | return -ENOMEM; | |
4216 | } | |
4217 | if (new_sta) { | |
4218 | u32 rates = 0, basic_rates = 0; | |
4219 | bool have_higher_than_11mbit; | |
4220 | int min_rate = INT_MAX, min_rate_index = -1; | |
4221 | struct ieee80211_chanctx_conf *chanctx_conf; | |
4222 | struct ieee80211_supported_band *sband; | |
4223 | const struct cfg80211_bss_ies *ies; | |
4224 | int shift; | |
4225 | u32 rate_flags; | |
4226 | ||
4227 | sband = local->hw.wiphy->bands[cbss->channel->band]; | |
4228 | ||
4229 | err = ieee80211_prep_channel(sdata, cbss); | |
4230 | if (err) { | |
4231 | sta_info_free(local, new_sta); | |
4232 | return -EINVAL; | |
4233 | } | |
4234 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
4235 | ||
4236 | rcu_read_lock(); | |
4237 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4238 | if (WARN_ON(!chanctx_conf)) { | |
4239 | rcu_read_unlock(); | |
4240 | sta_info_free(local, new_sta); | |
4241 | return -EINVAL; | |
4242 | } | |
4243 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
4244 | rcu_read_unlock(); | |
4245 | ||
4246 | ieee80211_get_rates(sband, bss->supp_rates, | |
4247 | bss->supp_rates_len, | |
4248 | &rates, &basic_rates, | |
4249 | &have_higher_than_11mbit, | |
4250 | &min_rate, &min_rate_index, | |
4251 | shift, rate_flags); | |
4252 | ||
4253 | /* | |
4254 | * This used to be a workaround for basic rates missing | |
4255 | * in the association response frame. Now that we no | |
4256 | * longer use the basic rates from there, it probably | |
4257 | * doesn't happen any more, but keep the workaround so | |
4258 | * in case some *other* APs are buggy in different ways | |
4259 | * we can connect -- with a warning. | |
4260 | */ | |
4261 | if (!basic_rates && min_rate_index >= 0) { | |
4262 | sdata_info(sdata, | |
4263 | "No basic rates, using min rate instead\n"); | |
4264 | basic_rates = BIT(min_rate_index); | |
4265 | } | |
4266 | ||
4267 | new_sta->sta.supp_rates[cbss->channel->band] = rates; | |
4268 | sdata->vif.bss_conf.basic_rates = basic_rates; | |
4269 | ||
4270 | /* cf. IEEE 802.11 9.2.12 */ | |
4271 | if (cbss->channel->band == IEEE80211_BAND_2GHZ && | |
4272 | have_higher_than_11mbit) | |
4273 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
4274 | else | |
4275 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
4276 | ||
4277 | memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); | |
4278 | ||
4279 | /* set timing information */ | |
4280 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; | |
4281 | rcu_read_lock(); | |
4282 | ies = rcu_dereference(cbss->beacon_ies); | |
4283 | if (ies) { | |
4284 | const u8 *tim_ie; | |
4285 | ||
4286 | sdata->vif.bss_conf.sync_tsf = ies->tsf; | |
4287 | sdata->vif.bss_conf.sync_device_ts = | |
4288 | bss->device_ts_beacon; | |
4289 | tim_ie = cfg80211_find_ie(WLAN_EID_TIM, | |
4290 | ies->data, ies->len); | |
4291 | if (tim_ie && tim_ie[1] >= 2) | |
4292 | sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; | |
4293 | else | |
4294 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
4295 | } else if (!(local->hw.flags & | |
4296 | IEEE80211_HW_TIMING_BEACON_ONLY)) { | |
4297 | ies = rcu_dereference(cbss->proberesp_ies); | |
4298 | /* must be non-NULL since beacon IEs were NULL */ | |
4299 | sdata->vif.bss_conf.sync_tsf = ies->tsf; | |
4300 | sdata->vif.bss_conf.sync_device_ts = | |
4301 | bss->device_ts_presp; | |
4302 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
4303 | } else { | |
4304 | sdata->vif.bss_conf.sync_tsf = 0; | |
4305 | sdata->vif.bss_conf.sync_device_ts = 0; | |
4306 | sdata->vif.bss_conf.sync_dtim_count = 0; | |
4307 | } | |
4308 | rcu_read_unlock(); | |
4309 | ||
4310 | /* tell driver about BSSID, basic rates and timing */ | |
4311 | ieee80211_bss_info_change_notify(sdata, | |
4312 | BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | | |
4313 | BSS_CHANGED_BEACON_INT); | |
4314 | ||
4315 | if (assoc) | |
4316 | sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); | |
4317 | ||
4318 | err = sta_info_insert(new_sta); | |
4319 | new_sta = NULL; | |
4320 | if (err) { | |
4321 | sdata_info(sdata, | |
4322 | "failed to insert STA entry for the AP (error %d)\n", | |
4323 | err); | |
4324 | return err; | |
4325 | } | |
4326 | } else | |
4327 | WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); | |
4328 | ||
4329 | return 0; | |
4330 | } | |
4331 | ||
4332 | /* config hooks */ | |
4333 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, | |
4334 | struct cfg80211_auth_request *req) | |
4335 | { | |
4336 | struct ieee80211_local *local = sdata->local; | |
4337 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4338 | struct ieee80211_mgd_auth_data *auth_data; | |
4339 | u16 auth_alg; | |
4340 | int err; | |
4341 | ||
4342 | /* prepare auth data structure */ | |
4343 | ||
4344 | switch (req->auth_type) { | |
4345 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
4346 | auth_alg = WLAN_AUTH_OPEN; | |
4347 | break; | |
4348 | case NL80211_AUTHTYPE_SHARED_KEY: | |
4349 | if (IS_ERR(local->wep_tx_tfm)) | |
4350 | return -EOPNOTSUPP; | |
4351 | auth_alg = WLAN_AUTH_SHARED_KEY; | |
4352 | break; | |
4353 | case NL80211_AUTHTYPE_FT: | |
4354 | auth_alg = WLAN_AUTH_FT; | |
4355 | break; | |
4356 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
4357 | auth_alg = WLAN_AUTH_LEAP; | |
4358 | break; | |
4359 | case NL80211_AUTHTYPE_SAE: | |
4360 | auth_alg = WLAN_AUTH_SAE; | |
4361 | break; | |
4362 | default: | |
4363 | return -EOPNOTSUPP; | |
4364 | } | |
4365 | ||
4366 | auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len + | |
4367 | req->ie_len, GFP_KERNEL); | |
4368 | if (!auth_data) | |
4369 | return -ENOMEM; | |
4370 | ||
4371 | auth_data->bss = req->bss; | |
4372 | ||
4373 | if (req->sae_data_len >= 4) { | |
4374 | __le16 *pos = (__le16 *) req->sae_data; | |
4375 | auth_data->sae_trans = le16_to_cpu(pos[0]); | |
4376 | auth_data->sae_status = le16_to_cpu(pos[1]); | |
4377 | memcpy(auth_data->data, req->sae_data + 4, | |
4378 | req->sae_data_len - 4); | |
4379 | auth_data->data_len += req->sae_data_len - 4; | |
4380 | } | |
4381 | ||
4382 | if (req->ie && req->ie_len) { | |
4383 | memcpy(&auth_data->data[auth_data->data_len], | |
4384 | req->ie, req->ie_len); | |
4385 | auth_data->data_len += req->ie_len; | |
4386 | } | |
4387 | ||
4388 | if (req->key && req->key_len) { | |
4389 | auth_data->key_len = req->key_len; | |
4390 | auth_data->key_idx = req->key_idx; | |
4391 | memcpy(auth_data->key, req->key, req->key_len); | |
4392 | } | |
4393 | ||
4394 | auth_data->algorithm = auth_alg; | |
4395 | ||
4396 | /* try to authenticate/probe */ | |
4397 | ||
4398 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || | |
4399 | ifmgd->assoc_data) { | |
4400 | err = -EBUSY; | |
4401 | goto err_free; | |
4402 | } | |
4403 | ||
4404 | if (ifmgd->auth_data) | |
4405 | ieee80211_destroy_auth_data(sdata, false); | |
4406 | ||
4407 | /* prep auth_data so we don't go into idle on disassoc */ | |
4408 | ifmgd->auth_data = auth_data; | |
4409 | ||
4410 | if (ifmgd->associated) { | |
4411 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
4412 | ||
4413 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
4414 | WLAN_REASON_UNSPECIFIED, | |
4415 | false, frame_buf); | |
4416 | ||
4417 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
4418 | sizeof(frame_buf)); | |
4419 | } | |
4420 | ||
4421 | sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); | |
4422 | ||
4423 | err = ieee80211_prep_connection(sdata, req->bss, false); | |
4424 | if (err) | |
4425 | goto err_clear; | |
4426 | ||
4427 | err = ieee80211_probe_auth(sdata); | |
4428 | if (err) { | |
4429 | sta_info_destroy_addr(sdata, req->bss->bssid); | |
4430 | goto err_clear; | |
4431 | } | |
4432 | ||
4433 | /* hold our own reference */ | |
4434 | cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); | |
4435 | return 0; | |
4436 | ||
4437 | err_clear: | |
4438 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
4439 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
4440 | ifmgd->auth_data = NULL; | |
4441 | err_free: | |
4442 | kfree(auth_data); | |
4443 | return err; | |
4444 | } | |
4445 | ||
4446 | static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata, | |
4447 | const u8 *wmm_param, int len) | |
4448 | { | |
4449 | const u8 *pos; | |
4450 | size_t left; | |
4451 | ||
4452 | if (len < 8) | |
4453 | return false; | |
4454 | ||
4455 | if (wmm_param[5] != 1 /* version */) | |
4456 | return false; | |
4457 | ||
4458 | pos = wmm_param + 8; | |
4459 | left = len - 8; | |
4460 | ||
4461 | for (; left >= 4; left -= 4, pos += 4) { | |
4462 | u8 aifsn = pos[0] & 0x0f; | |
4463 | u8 ecwmin = pos[1] & 0x0f; | |
4464 | u8 ecwmax = (pos[1] & 0xf0) >> 4; | |
4465 | int aci = (pos[0] >> 5) & 0x03; | |
4466 | ||
4467 | if (aifsn < 2) { | |
4468 | sdata_info(sdata, | |
4469 | "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n", | |
4470 | aifsn, aci); | |
4471 | return false; | |
4472 | } | |
4473 | if (ecwmin > ecwmax) { | |
4474 | sdata_info(sdata, | |
4475 | "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n", | |
4476 | ecwmin, ecwmax, aci); | |
4477 | return false; | |
4478 | } | |
4479 | } | |
4480 | ||
4481 | return true; | |
4482 | } | |
4483 | ||
4484 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, | |
4485 | struct cfg80211_assoc_request *req) | |
4486 | { | |
4487 | struct ieee80211_local *local = sdata->local; | |
4488 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4489 | struct ieee80211_bss *bss = (void *)req->bss->priv; | |
4490 | struct ieee80211_mgd_assoc_data *assoc_data; | |
4491 | const struct cfg80211_bss_ies *beacon_ies; | |
4492 | struct ieee80211_supported_band *sband; | |
4493 | const u8 *ssidie, *ht_ie, *vht_ie; | |
4494 | int i, err; | |
4495 | ||
4496 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); | |
4497 | if (!assoc_data) | |
4498 | return -ENOMEM; | |
4499 | ||
4500 | rcu_read_lock(); | |
4501 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); | |
4502 | if (!ssidie) { | |
4503 | rcu_read_unlock(); | |
4504 | kfree(assoc_data); | |
4505 | return -EINVAL; | |
4506 | } | |
4507 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); | |
4508 | assoc_data->ssid_len = ssidie[1]; | |
4509 | rcu_read_unlock(); | |
4510 | ||
4511 | if (ifmgd->associated) { | |
4512 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
4513 | ||
4514 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
4515 | WLAN_REASON_UNSPECIFIED, | |
4516 | false, frame_buf); | |
4517 | ||
4518 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
4519 | sizeof(frame_buf)); | |
4520 | } | |
4521 | ||
4522 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { | |
4523 | err = -EBUSY; | |
4524 | goto err_free; | |
4525 | } | |
4526 | ||
4527 | if (ifmgd->assoc_data) { | |
4528 | err = -EBUSY; | |
4529 | goto err_free; | |
4530 | } | |
4531 | ||
4532 | if (ifmgd->auth_data) { | |
4533 | bool match; | |
4534 | ||
4535 | /* keep sta info, bssid if matching */ | |
4536 | match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); | |
4537 | ieee80211_destroy_auth_data(sdata, match); | |
4538 | } | |
4539 | ||
4540 | /* prepare assoc data */ | |
4541 | ||
4542 | ifmgd->beacon_crc_valid = false; | |
4543 | ||
4544 | assoc_data->wmm = bss->wmm_used && | |
4545 | (local->hw.queues >= IEEE80211_NUM_ACS); | |
4546 | if (assoc_data->wmm) { | |
4547 | /* try to check validity of WMM params IE */ | |
4548 | const struct cfg80211_bss_ies *ies; | |
4549 | const u8 *wp, *start, *end; | |
4550 | ||
4551 | rcu_read_lock(); | |
4552 | ies = rcu_dereference(req->bss->ies); | |
4553 | start = ies->data; | |
4554 | end = start + ies->len; | |
4555 | ||
4556 | while (true) { | |
4557 | wp = cfg80211_find_vendor_ie( | |
4558 | WLAN_OUI_MICROSOFT, | |
4559 | WLAN_OUI_TYPE_MICROSOFT_WMM, | |
4560 | start, end - start); | |
4561 | if (!wp) | |
4562 | break; | |
4563 | start = wp + wp[1] + 2; | |
4564 | /* if this IE is too short, try the next */ | |
4565 | if (wp[1] <= 4) | |
4566 | continue; | |
4567 | /* if this IE is WMM params, we found what we wanted */ | |
4568 | if (wp[6] == 1) | |
4569 | break; | |
4570 | } | |
4571 | ||
4572 | if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2, | |
4573 | wp[1] - 2)) { | |
4574 | assoc_data->wmm = false; | |
4575 | ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; | |
4576 | } | |
4577 | rcu_read_unlock(); | |
4578 | } | |
4579 | ||
4580 | /* | |
4581 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
4582 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
4583 | * ciphers is configured as pairwise. | |
4584 | * We can set this to true for non-11n hardware, that'll be checked | |
4585 | * separately along with the peer capabilities. | |
4586 | */ | |
4587 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { | |
4588 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
4589 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
4590 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { | |
4591 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4592 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4593 | netdev_info(sdata->dev, | |
4594 | "disabling HT/VHT due to WEP/TKIP use\n"); | |
4595 | } | |
4596 | } | |
4597 | ||
4598 | if (req->flags & ASSOC_REQ_DISABLE_HT) { | |
4599 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4600 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4601 | } | |
4602 | ||
4603 | if (req->flags & ASSOC_REQ_DISABLE_VHT) | |
4604 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4605 | ||
4606 | /* Also disable HT if we don't support it or the AP doesn't use WMM */ | |
4607 | sband = local->hw.wiphy->bands[req->bss->channel->band]; | |
4608 | if (!sband->ht_cap.ht_supported || | |
4609 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || | |
4610 | ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { | |
4611 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4612 | if (!bss->wmm_used && | |
4613 | !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) | |
4614 | netdev_info(sdata->dev, | |
4615 | "disabling HT as WMM/QoS is not supported by the AP\n"); | |
4616 | } | |
4617 | ||
4618 | /* disable VHT if we don't support it or the AP doesn't use WMM */ | |
4619 | if (!sband->vht_cap.vht_supported || | |
4620 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || | |
4621 | ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { | |
4622 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4623 | if (!bss->wmm_used && | |
4624 | !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) | |
4625 | netdev_info(sdata->dev, | |
4626 | "disabling VHT as WMM/QoS is not supported by the AP\n"); | |
4627 | } | |
4628 | ||
4629 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); | |
4630 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, | |
4631 | sizeof(ifmgd->ht_capa_mask)); | |
4632 | ||
4633 | memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); | |
4634 | memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, | |
4635 | sizeof(ifmgd->vht_capa_mask)); | |
4636 | ||
4637 | if (req->ie && req->ie_len) { | |
4638 | memcpy(assoc_data->ie, req->ie, req->ie_len); | |
4639 | assoc_data->ie_len = req->ie_len; | |
4640 | } | |
4641 | ||
4642 | assoc_data->bss = req->bss; | |
4643 | ||
4644 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { | |
4645 | if (ifmgd->powersave) | |
4646 | sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
4647 | else | |
4648 | sdata->smps_mode = IEEE80211_SMPS_OFF; | |
4649 | } else | |
4650 | sdata->smps_mode = ifmgd->req_smps; | |
4651 | ||
4652 | assoc_data->capability = req->bss->capability; | |
4653 | assoc_data->supp_rates = bss->supp_rates; | |
4654 | assoc_data->supp_rates_len = bss->supp_rates_len; | |
4655 | ||
4656 | rcu_read_lock(); | |
4657 | ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); | |
4658 | if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) | |
4659 | assoc_data->ap_ht_param = | |
4660 | ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; | |
4661 | else | |
4662 | ifmgd->flags |= IEEE80211_STA_DISABLE_HT; | |
4663 | vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); | |
4664 | if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) | |
4665 | memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, | |
4666 | sizeof(struct ieee80211_vht_cap)); | |
4667 | else | |
4668 | ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; | |
4669 | rcu_read_unlock(); | |
4670 | ||
4671 | if (bss->wmm_used && bss->uapsd_supported && | |
4672 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
4673 | assoc_data->uapsd = true; | |
4674 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; | |
4675 | } else { | |
4676 | assoc_data->uapsd = false; | |
4677 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; | |
4678 | } | |
4679 | ||
4680 | if (req->prev_bssid) | |
4681 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); | |
4682 | ||
4683 | if (req->use_mfp) { | |
4684 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
4685 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
4686 | } else { | |
4687 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
4688 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
4689 | } | |
4690 | ||
4691 | if (req->flags & ASSOC_REQ_USE_RRM) | |
4692 | ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; | |
4693 | else | |
4694 | ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; | |
4695 | ||
4696 | if (req->crypto.control_port) | |
4697 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
4698 | else | |
4699 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
4700 | ||
4701 | sdata->control_port_protocol = req->crypto.control_port_ethertype; | |
4702 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; | |
4703 | sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, | |
4704 | sdata->vif.type); | |
4705 | ||
4706 | /* kick off associate process */ | |
4707 | ||
4708 | ifmgd->assoc_data = assoc_data; | |
4709 | ifmgd->dtim_period = 0; | |
4710 | ifmgd->have_beacon = false; | |
4711 | ||
4712 | err = ieee80211_prep_connection(sdata, req->bss, true); | |
4713 | if (err) | |
4714 | goto err_clear; | |
4715 | ||
4716 | rcu_read_lock(); | |
4717 | beacon_ies = rcu_dereference(req->bss->beacon_ies); | |
4718 | ||
4719 | if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC && | |
4720 | !beacon_ies) { | |
4721 | /* | |
4722 | * Wait up to one beacon interval ... | |
4723 | * should this be more if we miss one? | |
4724 | */ | |
4725 | sdata_info(sdata, "waiting for beacon from %pM\n", | |
4726 | ifmgd->bssid); | |
4727 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); | |
4728 | assoc_data->timeout_started = true; | |
4729 | assoc_data->need_beacon = true; | |
4730 | } else if (beacon_ies) { | |
4731 | const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, | |
4732 | beacon_ies->data, | |
4733 | beacon_ies->len); | |
4734 | u8 dtim_count = 0; | |
4735 | ||
4736 | if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { | |
4737 | const struct ieee80211_tim_ie *tim; | |
4738 | tim = (void *)(tim_ie + 2); | |
4739 | ifmgd->dtim_period = tim->dtim_period; | |
4740 | dtim_count = tim->dtim_count; | |
4741 | } | |
4742 | ifmgd->have_beacon = true; | |
4743 | assoc_data->timeout = jiffies; | |
4744 | assoc_data->timeout_started = true; | |
4745 | ||
4746 | if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) { | |
4747 | sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; | |
4748 | sdata->vif.bss_conf.sync_device_ts = | |
4749 | bss->device_ts_beacon; | |
4750 | sdata->vif.bss_conf.sync_dtim_count = dtim_count; | |
4751 | } | |
4752 | } else { | |
4753 | assoc_data->timeout = jiffies; | |
4754 | assoc_data->timeout_started = true; | |
4755 | } | |
4756 | rcu_read_unlock(); | |
4757 | ||
4758 | run_again(sdata, assoc_data->timeout); | |
4759 | ||
4760 | if (bss->corrupt_data) { | |
4761 | char *corrupt_type = "data"; | |
4762 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { | |
4763 | if (bss->corrupt_data & | |
4764 | IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
4765 | corrupt_type = "beacon and probe response"; | |
4766 | else | |
4767 | corrupt_type = "beacon"; | |
4768 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
4769 | corrupt_type = "probe response"; | |
4770 | sdata_info(sdata, "associating with AP with corrupt %s\n", | |
4771 | corrupt_type); | |
4772 | } | |
4773 | ||
4774 | return 0; | |
4775 | err_clear: | |
4776 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
4777 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
4778 | ifmgd->assoc_data = NULL; | |
4779 | err_free: | |
4780 | kfree(assoc_data); | |
4781 | return err; | |
4782 | } | |
4783 | ||
4784 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, | |
4785 | struct cfg80211_deauth_request *req) | |
4786 | { | |
4787 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4788 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
4789 | bool tx = !req->local_state_change; | |
4790 | ||
4791 | if (ifmgd->auth_data && | |
4792 | ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { | |
4793 | sdata_info(sdata, | |
4794 | "aborting authentication with %pM by local choice (Reason: %u=%s)\n", | |
4795 | req->bssid, req->reason_code, | |
4796 | ieee80211_get_reason_code_string(req->reason_code)); | |
4797 | ||
4798 | drv_mgd_prepare_tx(sdata->local, sdata); | |
4799 | ieee80211_send_deauth_disassoc(sdata, req->bssid, | |
4800 | IEEE80211_STYPE_DEAUTH, | |
4801 | req->reason_code, tx, | |
4802 | frame_buf); | |
4803 | ieee80211_destroy_auth_data(sdata, false); | |
4804 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
4805 | IEEE80211_DEAUTH_FRAME_LEN); | |
4806 | ||
4807 | return 0; | |
4808 | } | |
4809 | ||
4810 | if (ifmgd->associated && | |
4811 | ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { | |
4812 | sdata_info(sdata, | |
4813 | "deauthenticating from %pM by local choice (Reason: %u=%s)\n", | |
4814 | req->bssid, req->reason_code, | |
4815 | ieee80211_get_reason_code_string(req->reason_code)); | |
4816 | ||
4817 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, | |
4818 | req->reason_code, tx, frame_buf); | |
4819 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
4820 | IEEE80211_DEAUTH_FRAME_LEN); | |
4821 | return 0; | |
4822 | } | |
4823 | ||
4824 | return -ENOTCONN; | |
4825 | } | |
4826 | ||
4827 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, | |
4828 | struct cfg80211_disassoc_request *req) | |
4829 | { | |
4830 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4831 | u8 bssid[ETH_ALEN]; | |
4832 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; | |
4833 | ||
4834 | /* | |
4835 | * cfg80211 should catch this ... but it's racy since | |
4836 | * we can receive a disassoc frame, process it, hand it | |
4837 | * to cfg80211 while that's in a locked section already | |
4838 | * trying to tell us that the user wants to disconnect. | |
4839 | */ | |
4840 | if (ifmgd->associated != req->bss) | |
4841 | return -ENOLINK; | |
4842 | ||
4843 | sdata_info(sdata, | |
4844 | "disassociating from %pM by local choice (Reason: %u=%s)\n", | |
4845 | req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); | |
4846 | ||
4847 | memcpy(bssid, req->bss->bssid, ETH_ALEN); | |
4848 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, | |
4849 | req->reason_code, !req->local_state_change, | |
4850 | frame_buf); | |
4851 | ||
4852 | cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, | |
4853 | IEEE80211_DEAUTH_FRAME_LEN); | |
4854 | ||
4855 | return 0; | |
4856 | } | |
4857 | ||
4858 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) | |
4859 | { | |
4860 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
4861 | ||
4862 | /* | |
4863 | * Make sure some work items will not run after this, | |
4864 | * they will not do anything but might not have been | |
4865 | * cancelled when disconnecting. | |
4866 | */ | |
4867 | cancel_work_sync(&ifmgd->monitor_work); | |
4868 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); | |
4869 | cancel_work_sync(&ifmgd->request_smps_work); | |
4870 | cancel_work_sync(&ifmgd->csa_connection_drop_work); | |
4871 | cancel_work_sync(&ifmgd->chswitch_work); | |
4872 | cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); | |
4873 | ||
4874 | sdata_lock(sdata); | |
4875 | if (ifmgd->assoc_data) { | |
4876 | struct cfg80211_bss *bss = ifmgd->assoc_data->bss; | |
4877 | ieee80211_destroy_assoc_data(sdata, false); | |
4878 | cfg80211_assoc_timeout(sdata->dev, bss); | |
4879 | } | |
4880 | if (ifmgd->auth_data) | |
4881 | ieee80211_destroy_auth_data(sdata, false); | |
4882 | spin_lock_bh(&ifmgd->teardown_lock); | |
4883 | if (ifmgd->teardown_skb) { | |
4884 | kfree_skb(ifmgd->teardown_skb); | |
4885 | ifmgd->teardown_skb = NULL; | |
4886 | ifmgd->orig_teardown_skb = NULL; | |
4887 | } | |
4888 | spin_unlock_bh(&ifmgd->teardown_lock); | |
4889 | del_timer_sync(&ifmgd->timer); | |
4890 | sdata_unlock(sdata); | |
4891 | } | |
4892 | ||
4893 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, | |
4894 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
4895 | gfp_t gfp) | |
4896 | { | |
4897 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4898 | ||
4899 | trace_api_cqm_rssi_notify(sdata, rssi_event); | |
4900 | ||
4901 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); | |
4902 | } | |
4903 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); | |
4904 | ||
4905 | void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) | |
4906 | { | |
4907 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4908 | ||
4909 | trace_api_cqm_beacon_loss_notify(sdata->local, sdata); | |
4910 | ||
4911 | cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); | |
4912 | } | |
4913 | EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); |