Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d9b93842 | 19 | #include <linux/moduleparam.h> |
d0709a65 | 20 | #include <linux/rtnetlink.h> |
e8db0be1 | 21 | #include <linux/pm_qos.h> |
d91f36db | 22 | #include <linux/crc32.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
f0706e82 | 25 | #include <net/mac80211.h> |
472dbc45 | 26 | #include <asm/unaligned.h> |
60f8b39c | 27 | |
f0706e82 | 28 | #include "ieee80211_i.h" |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 JB |
30 | #include "rate.h" |
31 | #include "led.h" | |
f0706e82 | 32 | |
66e67e41 JB |
33 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
34 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
35 | #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) | |
36 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
37 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
38 | ||
180205bd BG |
39 | static int max_nullfunc_tries = 2; |
40 | module_param(max_nullfunc_tries, int, 0644); | |
41 | MODULE_PARM_DESC(max_nullfunc_tries, | |
42 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); | |
43 | ||
44 | static int max_probe_tries = 5; | |
45 | module_param(max_probe_tries, int, 0644); | |
46 | MODULE_PARM_DESC(max_probe_tries, | |
47 | "Maximum probe tries before disconnecting (reason 4)."); | |
b291ba11 JB |
48 | |
49 | /* | |
7ccc8bd7 FF |
50 | * Beacon loss timeout is calculated as N frames times the |
51 | * advertised beacon interval. This may need to be somewhat | |
52 | * higher than what hardware might detect to account for | |
53 | * delays in the host processing frames. But since we also | |
54 | * probe on beacon miss before declaring the connection lost | |
55 | * default to what we want. | |
b291ba11 | 56 | */ |
7ccc8bd7 FF |
57 | #define IEEE80211_BEACON_LOSS_COUNT 7 |
58 | ||
b291ba11 JB |
59 | /* |
60 | * Time the connection can be idle before we probe | |
61 | * it to see if we can still talk to the AP. | |
62 | */ | |
d1c5091f | 63 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
64 | /* |
65 | * Time we wait for a probe response after sending | |
66 | * a probe request because of beacon loss or for | |
67 | * checking the connection still works. | |
68 | */ | |
180205bd BG |
69 | static int probe_wait_ms = 500; |
70 | module_param(probe_wait_ms, int, 0644); | |
71 | MODULE_PARM_DESC(probe_wait_ms, | |
72 | "Maximum time(ms) to wait for probe response" | |
73 | " before disconnecting (reason 4)."); | |
f0706e82 | 74 | |
17e4ec14 JM |
75 | /* |
76 | * Weight given to the latest Beacon frame when calculating average signal | |
77 | * strength for Beacon frames received in the current BSS. This must be | |
78 | * between 1 and 15. | |
79 | */ | |
80 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
81 | ||
391a200a JM |
82 | /* |
83 | * How many Beacon frames need to have been used in average signal strength | |
84 | * before starting to indicate signal change events. | |
85 | */ | |
86 | #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 | |
87 | ||
5bb644a0 JB |
88 | #define TMR_RUNNING_TIMER 0 |
89 | #define TMR_RUNNING_CHANSW 1 | |
90 | ||
5fef7dbc JB |
91 | #define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */) |
92 | ||
77fdaa12 JB |
93 | /* |
94 | * All cfg80211 functions have to be called outside a locked | |
95 | * section so that they can acquire a lock themselves... This | |
96 | * is much simpler than queuing up things in cfg80211, but we | |
97 | * do need some indirection for that here. | |
98 | */ | |
99 | enum rx_mgmt_action { | |
100 | /* no action required */ | |
101 | RX_MGMT_NONE, | |
102 | ||
77fdaa12 JB |
103 | /* caller must call cfg80211_send_deauth() */ |
104 | RX_MGMT_CFG80211_DEAUTH, | |
105 | ||
106 | /* caller must call cfg80211_send_disassoc() */ | |
107 | RX_MGMT_CFG80211_DISASSOC, | |
66e67e41 JB |
108 | |
109 | /* caller must call cfg80211_send_rx_auth() */ | |
110 | RX_MGMT_CFG80211_RX_AUTH, | |
111 | ||
112 | /* caller must call cfg80211_send_rx_assoc() */ | |
113 | RX_MGMT_CFG80211_RX_ASSOC, | |
114 | ||
115 | /* caller must call cfg80211_send_assoc_timeout() */ | |
116 | RX_MGMT_CFG80211_ASSOC_TIMEOUT, | |
77fdaa12 JB |
117 | }; |
118 | ||
5484e237 | 119 | /* utils */ |
77fdaa12 JB |
120 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
121 | { | |
46a5ebaf | 122 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 JB |
123 | } |
124 | ||
ca386f31 JB |
125 | /* |
126 | * We can have multiple work items (and connection probing) | |
127 | * scheduling this timer, but we need to take care to only | |
128 | * reschedule it when it should fire _earlier_ than it was | |
129 | * asked for before, or if it's not pending right now. This | |
130 | * function ensures that. Note that it then is required to | |
131 | * run this function for all timeouts after the first one | |
132 | * has happened -- the work that runs from this timer will | |
133 | * do that. | |
134 | */ | |
66e67e41 | 135 | static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout) |
ca386f31 JB |
136 | { |
137 | ASSERT_MGD_MTX(ifmgd); | |
138 | ||
139 | if (!timer_pending(&ifmgd->timer) || | |
140 | time_before(timeout, ifmgd->timer.expires)) | |
141 | mod_timer(&ifmgd->timer, timeout); | |
142 | } | |
143 | ||
d3a910a8 | 144 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
b291ba11 | 145 | { |
c1288b12 | 146 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
b291ba11 JB |
147 | return; |
148 | ||
149 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
7ccc8bd7 | 150 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
b291ba11 JB |
151 | } |
152 | ||
be099e82 LR |
153 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
154 | { | |
0c699c3a LR |
155 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
156 | ||
8628172f SG |
157 | if (unlikely(!sdata->u.mgd.associated)) |
158 | return; | |
159 | ||
be099e82 LR |
160 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
161 | return; | |
162 | ||
163 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
164 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
0c699c3a LR |
165 | |
166 | ifmgd->probe_send_count = 0; | |
be099e82 LR |
167 | } |
168 | ||
5484e237 | 169 | static int ecw2cw(int ecw) |
60f8b39c | 170 | { |
5484e237 | 171 | return (1 << ecw) - 1; |
60f8b39c JB |
172 | } |
173 | ||
24398e39 JB |
174 | static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata, |
175 | struct ieee80211_ht_operation *ht_oper, | |
176 | const u8 *bssid, bool reconfig) | |
d5522e03 JB |
177 | { |
178 | struct ieee80211_local *local = sdata->local; | |
179 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
180 | struct sta_info *sta; |
181 | u32 changed = 0; | |
9ed6bcce | 182 | u16 ht_opmode; |
64f68e5d | 183 | bool disable_40 = false; |
d5522e03 JB |
184 | |
185 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
d5522e03 | 186 | |
64f68e5d JB |
187 | switch (sdata->vif.bss_conf.channel_type) { |
188 | case NL80211_CHAN_HT40PLUS: | |
189 | if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS) | |
190 | disable_40 = true; | |
191 | break; | |
192 | case NL80211_CHAN_HT40MINUS: | |
193 | if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS) | |
194 | disable_40 = true; | |
195 | break; | |
196 | default: | |
197 | break; | |
198 | } | |
d5522e03 | 199 | |
24398e39 JB |
200 | /* This can change during the lifetime of the BSS */ |
201 | if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) | |
64f68e5d JB |
202 | disable_40 = true; |
203 | ||
204 | mutex_lock(&local->sta_mtx); | |
205 | sta = sta_info_get(sdata, bssid); | |
d5522e03 | 206 | |
64f68e5d JB |
207 | WARN_ON_ONCE(!sta); |
208 | ||
209 | if (sta && !sta->supports_40mhz) | |
210 | disable_40 = true; | |
211 | ||
212 | if (sta && (!reconfig || | |
91a0099c | 213 | (disable_40 != !(sta->sta.ht_cap.cap & |
64f68e5d | 214 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) { |
d5522e03 | 215 | |
64f68e5d JB |
216 | if (disable_40) |
217 | sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
218 | else | |
219 | sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
7cc44ed4 | 220 | |
64f68e5d | 221 | rate_control_rate_update(local, sband, sta, |
8f727ef3 | 222 | IEEE80211_RC_BW_CHANGED); |
0aaffa9b | 223 | } |
64f68e5d | 224 | mutex_unlock(&local->sta_mtx); |
d5522e03 | 225 | |
074d46d1 | 226 | ht_opmode = le16_to_cpu(ht_oper->operation_mode); |
d5522e03 JB |
227 | |
228 | /* if bss configuration changed store the new one */ | |
24398e39 | 229 | if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) { |
d5522e03 | 230 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 231 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
d5522e03 JB |
232 | } |
233 | ||
234 | return changed; | |
235 | } | |
236 | ||
9c6bd790 JB |
237 | /* frame sending functions */ |
238 | ||
66e67e41 JB |
239 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, |
240 | struct ieee80211_supported_band *sband, | |
241 | u32 *rates) | |
242 | { | |
243 | int i, j, count; | |
244 | *rates = 0; | |
245 | count = 0; | |
246 | for (i = 0; i < supp_rates_len; i++) { | |
247 | int rate = (supp_rates[i] & 0x7F) * 5; | |
248 | ||
249 | for (j = 0; j < sband->n_bitrates; j++) | |
250 | if (sband->bitrates[j].bitrate == rate) { | |
251 | *rates |= BIT(j); | |
252 | count++; | |
253 | break; | |
254 | } | |
255 | } | |
256 | ||
257 | return count; | |
258 | } | |
259 | ||
260 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, | |
9dde6423 | 261 | struct sk_buff *skb, u8 ap_ht_param, |
66e67e41 JB |
262 | struct ieee80211_supported_band *sband, |
263 | struct ieee80211_channel *channel, | |
264 | enum ieee80211_smps_mode smps) | |
265 | { | |
66e67e41 JB |
266 | u8 *pos; |
267 | u32 flags = channel->flags; | |
268 | u16 cap; | |
269 | struct ieee80211_sta_ht_cap ht_cap; | |
270 | ||
271 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); | |
272 | ||
66e67e41 JB |
273 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
274 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
275 | ||
66e67e41 JB |
276 | /* determine capability flags */ |
277 | cap = ht_cap.cap; | |
278 | ||
9dde6423 | 279 | switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
66e67e41 JB |
280 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
281 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
282 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
283 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
284 | } | |
285 | break; | |
286 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
287 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
288 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
289 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
290 | } | |
291 | break; | |
292 | } | |
293 | ||
24398e39 JB |
294 | /* |
295 | * If 40 MHz was disabled associate as though we weren't | |
296 | * capable of 40 MHz -- some broken APs will never fall | |
297 | * back to trying to transmit in 20 MHz. | |
298 | */ | |
299 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { | |
300 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
301 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
302 | } | |
303 | ||
66e67e41 JB |
304 | /* set SM PS mode properly */ |
305 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
306 | switch (smps) { | |
307 | case IEEE80211_SMPS_AUTOMATIC: | |
308 | case IEEE80211_SMPS_NUM_MODES: | |
309 | WARN_ON(1); | |
310 | case IEEE80211_SMPS_OFF: | |
311 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
312 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
313 | break; | |
314 | case IEEE80211_SMPS_STATIC: | |
315 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
316 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
317 | break; | |
318 | case IEEE80211_SMPS_DYNAMIC: | |
319 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
320 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
321 | break; | |
322 | } | |
323 | ||
324 | /* reserve and fill IE */ | |
325 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
326 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); | |
327 | } | |
328 | ||
329 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
330 | { | |
331 | struct ieee80211_local *local = sdata->local; | |
332 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
333 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
334 | struct sk_buff *skb; | |
335 | struct ieee80211_mgmt *mgmt; | |
336 | u8 *pos, qos_info; | |
337 | size_t offset = 0, noffset; | |
338 | int i, count, rates_len, supp_rates_len; | |
339 | u16 capab; | |
340 | struct ieee80211_supported_band *sband; | |
341 | u32 rates = 0; | |
66e67e41 JB |
342 | |
343 | lockdep_assert_held(&ifmgd->mtx); | |
344 | ||
345 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
346 | ||
347 | if (assoc_data->supp_rates_len) { | |
348 | /* | |
349 | * Get all rates supported by the device and the AP as | |
350 | * some APs don't like getting a superset of their rates | |
351 | * in the association request (e.g. D-Link DAP 1353 in | |
352 | * b-only mode)... | |
353 | */ | |
354 | rates_len = ieee80211_compatible_rates(assoc_data->supp_rates, | |
355 | assoc_data->supp_rates_len, | |
356 | sband, &rates); | |
357 | } else { | |
358 | /* | |
359 | * In case AP not provide any supported rates information | |
360 | * before association, we send information element(s) with | |
361 | * all rates that we support. | |
362 | */ | |
363 | rates = ~0; | |
364 | rates_len = sband->n_bitrates; | |
365 | } | |
366 | ||
367 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
368 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
369 | 2 + assoc_data->ssid_len + /* SSID */ | |
370 | 4 + rates_len + /* (extended) rates */ | |
371 | 4 + /* power capability */ | |
372 | 2 + 2 * sband->n_channels + /* supported channels */ | |
373 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
374 | assoc_data->ie_len + /* extra IEs */ | |
375 | 9, /* WMM */ | |
376 | GFP_KERNEL); | |
377 | if (!skb) | |
378 | return; | |
379 | ||
380 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
381 | ||
382 | capab = WLAN_CAPABILITY_ESS; | |
383 | ||
384 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
385 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
386 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
387 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
388 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
389 | } | |
390 | ||
391 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) | |
392 | capab |= WLAN_CAPABILITY_PRIVACY; | |
393 | ||
394 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
395 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
396 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
397 | ||
398 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
399 | memset(mgmt, 0, 24); | |
400 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); | |
401 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
402 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); | |
403 | ||
404 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { | |
405 | skb_put(skb, 10); | |
406 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
407 | IEEE80211_STYPE_REASSOC_REQ); | |
408 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
409 | mgmt->u.reassoc_req.listen_interval = | |
410 | cpu_to_le16(local->hw.conf.listen_interval); | |
411 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, | |
412 | ETH_ALEN); | |
413 | } else { | |
414 | skb_put(skb, 4); | |
415 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
416 | IEEE80211_STYPE_ASSOC_REQ); | |
417 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
418 | mgmt->u.assoc_req.listen_interval = | |
419 | cpu_to_le16(local->hw.conf.listen_interval); | |
420 | } | |
421 | ||
422 | /* SSID */ | |
423 | pos = skb_put(skb, 2 + assoc_data->ssid_len); | |
424 | *pos++ = WLAN_EID_SSID; | |
425 | *pos++ = assoc_data->ssid_len; | |
426 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); | |
427 | ||
428 | /* add all rates which were marked to be used above */ | |
429 | supp_rates_len = rates_len; | |
430 | if (supp_rates_len > 8) | |
431 | supp_rates_len = 8; | |
432 | ||
433 | pos = skb_put(skb, supp_rates_len + 2); | |
434 | *pos++ = WLAN_EID_SUPP_RATES; | |
435 | *pos++ = supp_rates_len; | |
436 | ||
437 | count = 0; | |
438 | for (i = 0; i < sband->n_bitrates; i++) { | |
439 | if (BIT(i) & rates) { | |
440 | int rate = sband->bitrates[i].bitrate; | |
441 | *pos++ = (u8) (rate / 5); | |
442 | if (++count == 8) | |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | if (rates_len > count) { | |
448 | pos = skb_put(skb, rates_len - count + 2); | |
449 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
450 | *pos++ = rates_len - count; | |
451 | ||
452 | for (i++; i < sband->n_bitrates; i++) { | |
453 | if (BIT(i) & rates) { | |
454 | int rate = sband->bitrates[i].bitrate; | |
455 | *pos++ = (u8) (rate / 5); | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
460 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
461 | /* 1. power capabilities */ | |
462 | pos = skb_put(skb, 4); | |
463 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
464 | *pos++ = 2; | |
465 | *pos++ = 0; /* min tx power */ | |
466 | *pos++ = local->oper_channel->max_power; /* max tx power */ | |
467 | ||
468 | /* 2. supported channels */ | |
469 | /* TODO: get this in reg domain format */ | |
470 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
471 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
472 | *pos++ = 2 * sband->n_channels; | |
473 | for (i = 0; i < sband->n_channels; i++) { | |
474 | *pos++ = ieee80211_frequency_to_channel( | |
475 | sband->channels[i].center_freq); | |
476 | *pos++ = 1; /* one channel in the subband*/ | |
477 | } | |
478 | } | |
479 | ||
480 | /* if present, add any custom IEs that go before HT */ | |
481 | if (assoc_data->ie_len && assoc_data->ie) { | |
482 | static const u8 before_ht[] = { | |
483 | WLAN_EID_SSID, | |
484 | WLAN_EID_SUPP_RATES, | |
485 | WLAN_EID_EXT_SUPP_RATES, | |
486 | WLAN_EID_PWR_CAPABILITY, | |
487 | WLAN_EID_SUPPORTED_CHANNELS, | |
488 | WLAN_EID_RSN, | |
489 | WLAN_EID_QOS_CAPA, | |
490 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
491 | WLAN_EID_MOBILITY_DOMAIN, | |
492 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
493 | }; | |
494 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, | |
495 | before_ht, ARRAY_SIZE(before_ht), | |
496 | offset); | |
497 | pos = skb_put(skb, noffset - offset); | |
498 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
499 | offset = noffset; | |
500 | } | |
501 | ||
4e74bfdb | 502 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
9dde6423 | 503 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, |
66e67e41 JB |
504 | sband, local->oper_channel, ifmgd->ap_smps); |
505 | ||
506 | /* if present, add any custom non-vendor IEs that go after HT */ | |
507 | if (assoc_data->ie_len && assoc_data->ie) { | |
508 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, | |
509 | assoc_data->ie_len, | |
510 | offset); | |
511 | pos = skb_put(skb, noffset - offset); | |
512 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
513 | offset = noffset; | |
514 | } | |
515 | ||
76f0303d JB |
516 | if (assoc_data->wmm) { |
517 | if (assoc_data->uapsd) { | |
dc41e4d4 EP |
518 | qos_info = ifmgd->uapsd_queues; |
519 | qos_info |= (ifmgd->uapsd_max_sp_len << | |
66e67e41 JB |
520 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
521 | } else { | |
522 | qos_info = 0; | |
523 | } | |
524 | ||
525 | pos = skb_put(skb, 9); | |
526 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
527 | *pos++ = 7; /* len */ | |
528 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
529 | *pos++ = 0x50; | |
530 | *pos++ = 0xf2; | |
531 | *pos++ = 2; /* WME */ | |
532 | *pos++ = 0; /* WME info */ | |
533 | *pos++ = 1; /* WME ver */ | |
534 | *pos++ = qos_info; | |
535 | } | |
536 | ||
537 | /* add any remaining custom (i.e. vendor specific here) IEs */ | |
538 | if (assoc_data->ie_len && assoc_data->ie) { | |
539 | noffset = assoc_data->ie_len; | |
540 | pos = skb_put(skb, noffset - offset); | |
541 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
542 | } | |
543 | ||
a1845fc7 JB |
544 | drv_mgd_prepare_tx(local, sdata); |
545 | ||
66e67e41 JB |
546 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
547 | ieee80211_tx_skb(sdata, skb); | |
548 | } | |
549 | ||
ef422bc0 | 550 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 551 | const u8 *bssid, u16 stype, |
5fef7dbc JB |
552 | u16 reason, bool send_frame, |
553 | u8 *frame_buf) | |
9ac19a90 JB |
554 | { |
555 | struct ieee80211_local *local = sdata->local; | |
46900298 | 556 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 | 557 | struct sk_buff *skb; |
5fef7dbc | 558 | struct ieee80211_mgmt *mgmt = (void *)frame_buf; |
d15b8459 | 559 | |
5fef7dbc JB |
560 | /* build frame */ |
561 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); | |
562 | mgmt->duration = 0; /* initialize only */ | |
563 | mgmt->seq_ctrl = 0; /* initialize only */ | |
77fdaa12 | 564 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 565 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 566 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 567 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
568 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
569 | ||
5fef7dbc JB |
570 | if (send_frame) { |
571 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
572 | DEAUTH_DISASSOC_LEN); | |
573 | if (!skb) | |
574 | return; | |
d5cdfacb | 575 | |
5fef7dbc JB |
576 | skb_reserve(skb, local->hw.extra_tx_headroom); |
577 | ||
578 | /* copy in frame */ | |
579 | memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN), | |
580 | mgmt, DEAUTH_DISASSOC_LEN); | |
581 | ||
582 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) | |
583 | IEEE80211_SKB_CB(skb)->flags |= | |
584 | IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
a1845fc7 JB |
585 | |
586 | drv_mgd_prepare_tx(local, sdata); | |
587 | ||
d5cdfacb | 588 | ieee80211_tx_skb(sdata, skb); |
5fef7dbc | 589 | } |
9ac19a90 JB |
590 | } |
591 | ||
572e0012 KV |
592 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
593 | struct ieee80211_sub_if_data *sdata) | |
594 | { | |
572e0012 KV |
595 | struct ieee80211_pspoll *pspoll; |
596 | struct sk_buff *skb; | |
572e0012 | 597 | |
d8cd189e KV |
598 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
599 | if (!skb) | |
572e0012 | 600 | return; |
572e0012 | 601 | |
d8cd189e KV |
602 | pspoll = (struct ieee80211_pspoll *) skb->data; |
603 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 604 | |
62ae67be JB |
605 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
606 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
607 | } |
608 | ||
965bedad JB |
609 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
610 | struct ieee80211_sub_if_data *sdata, | |
611 | int powersave) | |
612 | { | |
613 | struct sk_buff *skb; | |
d8cd189e | 614 | struct ieee80211_hdr_3addr *nullfunc; |
b6f35301 | 615 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad | 616 | |
d8cd189e KV |
617 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
618 | if (!skb) | |
965bedad | 619 | return; |
965bedad | 620 | |
d8cd189e | 621 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 622 | if (powersave) |
d8cd189e | 623 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 624 | |
62ae67be | 625 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
b6f35301 RM |
626 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
627 | IEEE80211_STA_CONNECTION_POLL)) | |
628 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; | |
629 | ||
62ae67be | 630 | ieee80211_tx_skb(sdata, skb); |
965bedad JB |
631 | } |
632 | ||
d524215f FF |
633 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
634 | struct ieee80211_sub_if_data *sdata) | |
635 | { | |
636 | struct sk_buff *skb; | |
637 | struct ieee80211_hdr *nullfunc; | |
638 | __le16 fc; | |
639 | ||
640 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
641 | return; | |
642 | ||
643 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
d15b8459 | 644 | if (!skb) |
d524215f | 645 | return; |
d15b8459 | 646 | |
d524215f FF |
647 | skb_reserve(skb, local->hw.extra_tx_headroom); |
648 | ||
649 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
650 | memset(nullfunc, 0, 30); | |
651 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
652 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
653 | nullfunc->frame_control = fc; | |
654 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
655 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
656 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
657 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
658 | ||
659 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
660 | ieee80211_tx_skb(sdata, skb); | |
661 | } | |
662 | ||
cc32abd4 JB |
663 | /* spectrum management related things */ |
664 | static void ieee80211_chswitch_work(struct work_struct *work) | |
665 | { | |
666 | struct ieee80211_sub_if_data *sdata = | |
667 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
668 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
669 | ||
9607e6b6 | 670 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
671 | return; |
672 | ||
77fdaa12 JB |
673 | mutex_lock(&ifmgd->mtx); |
674 | if (!ifmgd->associated) | |
675 | goto out; | |
cc32abd4 JB |
676 | |
677 | sdata->local->oper_channel = sdata->local->csa_channel; | |
5ce6e438 JB |
678 | if (!sdata->local->ops->channel_switch) { |
679 | /* call "hw_config" only if doing sw channel switch */ | |
680 | ieee80211_hw_config(sdata->local, | |
681 | IEEE80211_CONF_CHANGE_CHANNEL); | |
1ea57b1f SL |
682 | } else { |
683 | /* update the device channel directly */ | |
684 | sdata->local->hw.conf.channel = sdata->local->oper_channel; | |
5ce6e438 | 685 | } |
77fdaa12 | 686 | |
cc32abd4 | 687 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 688 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 689 | |
cc32abd4 JB |
690 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
691 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
692 | out: |
693 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
694 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
695 | } |
696 | ||
5ce6e438 JB |
697 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
698 | { | |
699 | struct ieee80211_sub_if_data *sdata; | |
700 | struct ieee80211_if_managed *ifmgd; | |
701 | ||
702 | sdata = vif_to_sdata(vif); | |
703 | ifmgd = &sdata->u.mgd; | |
704 | ||
705 | trace_api_chswitch_done(sdata, success); | |
706 | if (!success) { | |
707 | /* | |
708 | * If the channel switch was not successful, stay | |
709 | * around on the old channel. We currently lack | |
710 | * good handling of this situation, possibly we | |
711 | * should just drop the association. | |
712 | */ | |
713 | sdata->local->csa_channel = sdata->local->oper_channel; | |
714 | } | |
715 | ||
716 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
717 | } | |
718 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
719 | ||
cc32abd4 JB |
720 | static void ieee80211_chswitch_timer(unsigned long data) |
721 | { | |
722 | struct ieee80211_sub_if_data *sdata = | |
723 | (struct ieee80211_sub_if_data *) data; | |
724 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
725 | ||
5bb644a0 JB |
726 | if (sdata->local->quiescing) { |
727 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
728 | return; | |
729 | } | |
730 | ||
42935eca | 731 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
732 | } |
733 | ||
734 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
735 | struct ieee80211_channel_sw_ie *sw_elem, | |
5ce6e438 JB |
736 | struct ieee80211_bss *bss, |
737 | u64 timestamp) | |
cc32abd4 | 738 | { |
0c1ad2ca JB |
739 | struct cfg80211_bss *cbss = |
740 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
741 | struct ieee80211_channel *new_ch; |
742 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
59eb21a6 BR |
743 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, |
744 | cbss->channel->band); | |
cc32abd4 | 745 | |
77fdaa12 JB |
746 | ASSERT_MGD_MTX(ifmgd); |
747 | ||
748 | if (!ifmgd->associated) | |
cc32abd4 JB |
749 | return; |
750 | ||
fbe9c429 | 751 | if (sdata->local->scanning) |
cc32abd4 JB |
752 | return; |
753 | ||
754 | /* Disregard subsequent beacons if we are already running a timer | |
755 | processing a CSA */ | |
756 | ||
757 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
758 | return; | |
759 | ||
760 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
761 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
762 | return; | |
763 | ||
764 | sdata->local->csa_channel = new_ch; | |
765 | ||
5ce6e438 JB |
766 | if (sdata->local->ops->channel_switch) { |
767 | /* use driver's channel switch callback */ | |
768 | struct ieee80211_channel_switch ch_switch; | |
769 | memset(&ch_switch, 0, sizeof(ch_switch)); | |
770 | ch_switch.timestamp = timestamp; | |
771 | if (sw_elem->mode) { | |
772 | ch_switch.block_tx = true; | |
773 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
774 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
775 | } | |
776 | ch_switch.channel = new_ch; | |
777 | ch_switch.count = sw_elem->count; | |
778 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
779 | drv_channel_switch(sdata->local, &ch_switch); | |
780 | return; | |
781 | } | |
782 | ||
783 | /* channel switch handled in software */ | |
cc32abd4 | 784 | if (sw_elem->count <= 1) { |
42935eca | 785 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 | 786 | } else { |
9feaddc7 WYG |
787 | if (sw_elem->mode) |
788 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
cc32abd4 JB |
789 | IEEE80211_QUEUE_STOP_REASON_CSA); |
790 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
791 | mod_timer(&ifmgd->chswitch_timer, | |
792 | jiffies + | |
793 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 794 | cbss->beacon_interval)); |
cc32abd4 JB |
795 | } |
796 | } | |
797 | ||
798 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
799 | u16 capab_info, u8 *pwr_constr_elem, | |
800 | u8 pwr_constr_elem_len) | |
801 | { | |
802 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
803 | ||
804 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
805 | return; | |
806 | ||
807 | /* Power constraint IE length should be 1 octet */ | |
808 | if (pwr_constr_elem_len != 1) | |
809 | return; | |
810 | ||
a48b13ac | 811 | if ((*pwr_constr_elem <= conf->channel->max_reg_power) && |
cc32abd4 JB |
812 | (*pwr_constr_elem != sdata->local->power_constr_level)) { |
813 | sdata->local->power_constr_level = *pwr_constr_elem; | |
814 | ieee80211_hw_config(sdata->local, 0); | |
815 | } | |
816 | } | |
817 | ||
f90754c1 JO |
818 | void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif) |
819 | { | |
820 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
821 | struct ieee80211_local *local = sdata->local; | |
822 | struct ieee80211_conf *conf = &local->hw.conf; | |
823 | ||
824 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
825 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
826 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
827 | ||
828 | local->disable_dynamic_ps = false; | |
829 | conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout; | |
830 | } | |
831 | EXPORT_SYMBOL(ieee80211_enable_dyn_ps); | |
832 | ||
833 | void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif) | |
834 | { | |
835 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
836 | struct ieee80211_local *local = sdata->local; | |
837 | struct ieee80211_conf *conf = &local->hw.conf; | |
838 | ||
839 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
840 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
841 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
842 | ||
843 | local->disable_dynamic_ps = true; | |
844 | conf->dynamic_ps_timeout = 0; | |
845 | del_timer_sync(&local->dynamic_ps_timer); | |
846 | ieee80211_queue_work(&local->hw, | |
847 | &local->dynamic_ps_enable_work); | |
848 | } | |
849 | EXPORT_SYMBOL(ieee80211_disable_dyn_ps); | |
850 | ||
965bedad JB |
851 | /* powersave */ |
852 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
853 | struct ieee80211_sub_if_data *sdata) | |
854 | { | |
855 | struct ieee80211_conf *conf = &local->hw.conf; | |
856 | ||
d5edaedc JB |
857 | /* |
858 | * If we are scanning right now then the parameters will | |
859 | * take effect when scan finishes. | |
860 | */ | |
fbe9c429 | 861 | if (local->scanning) |
d5edaedc JB |
862 | return; |
863 | ||
965bedad JB |
864 | if (conf->dynamic_ps_timeout > 0 && |
865 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
866 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
867 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
868 | } else { | |
869 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
870 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf | 871 | |
2a13052f JO |
872 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
873 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
874 | return; | |
875 | ||
876 | conf->flags |= IEEE80211_CONF_PS; | |
877 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
965bedad JB |
878 | } |
879 | } | |
880 | ||
881 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
882 | { | |
883 | struct ieee80211_conf *conf = &local->hw.conf; | |
884 | ||
885 | if (local->ps_sdata) { | |
965bedad JB |
886 | ieee80211_enable_ps(local, local->ps_sdata); |
887 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
888 | conf->flags &= ~IEEE80211_CONF_PS; | |
889 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
890 | del_timer_sync(&local->dynamic_ps_timer); | |
891 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
892 | } | |
893 | } | |
894 | ||
808118cb JY |
895 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
896 | { | |
897 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; | |
898 | struct sta_info *sta = NULL; | |
c2c98fde | 899 | bool authorized = false; |
808118cb JY |
900 | |
901 | if (!mgd->powersave) | |
902 | return false; | |
903 | ||
05cb9108 JB |
904 | if (mgd->broken_ap) |
905 | return false; | |
906 | ||
808118cb JY |
907 | if (!mgd->associated) |
908 | return false; | |
909 | ||
808118cb JY |
910 | if (mgd->flags & (IEEE80211_STA_BEACON_POLL | |
911 | IEEE80211_STA_CONNECTION_POLL)) | |
912 | return false; | |
913 | ||
914 | rcu_read_lock(); | |
915 | sta = sta_info_get(sdata, mgd->bssid); | |
916 | if (sta) | |
c2c98fde | 917 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
808118cb JY |
918 | rcu_read_unlock(); |
919 | ||
c2c98fde | 920 | return authorized; |
808118cb JY |
921 | } |
922 | ||
965bedad | 923 | /* need to hold RTNL or interface lock */ |
10f644a4 | 924 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
925 | { |
926 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
927 | int count = 0; | |
195e294d | 928 | int timeout; |
965bedad JB |
929 | |
930 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
931 | local->ps_sdata = NULL; | |
932 | return; | |
933 | } | |
934 | ||
935 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 936 | if (!ieee80211_sdata_running(sdata)) |
965bedad | 937 | continue; |
8c7914de RM |
938 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
939 | /* If an AP vif is found, then disable PS | |
940 | * by setting the count to zero thereby setting | |
941 | * ps_sdata to NULL. | |
942 | */ | |
943 | count = 0; | |
944 | break; | |
945 | } | |
965bedad JB |
946 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
947 | continue; | |
948 | found = sdata; | |
949 | count++; | |
950 | } | |
951 | ||
808118cb | 952 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
f90754c1 | 953 | struct ieee80211_conf *conf = &local->hw.conf; |
10f644a4 JB |
954 | s32 beaconint_us; |
955 | ||
956 | if (latency < 0) | |
ed77134b | 957 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
10f644a4 JB |
958 | |
959 | beaconint_us = ieee80211_tu_to_usec( | |
960 | found->vif.bss_conf.beacon_int); | |
961 | ||
ff616381 | 962 | timeout = local->dynamic_ps_forced_timeout; |
195e294d JO |
963 | if (timeout < 0) { |
964 | /* | |
ff616381 JO |
965 | * Go to full PSM if the user configures a very low |
966 | * latency requirement. | |
0ab82b04 EP |
967 | * The 2000 second value is there for compatibility |
968 | * until the PM_QOS_NETWORK_LATENCY is configured | |
969 | * with real values. | |
195e294d | 970 | */ |
0ab82b04 EP |
971 | if (latency > (1900 * USEC_PER_MSEC) && |
972 | latency != (2000 * USEC_PER_SEC)) | |
195e294d | 973 | timeout = 0; |
ff616381 JO |
974 | else |
975 | timeout = 100; | |
195e294d | 976 | } |
f90754c1 JO |
977 | local->dynamic_ps_user_timeout = timeout; |
978 | if (!local->disable_dynamic_ps) | |
979 | conf->dynamic_ps_timeout = | |
980 | local->dynamic_ps_user_timeout; | |
195e294d | 981 | |
04fe2037 | 982 | if (beaconint_us > latency) { |
10f644a4 | 983 | local->ps_sdata = NULL; |
04fe2037 | 984 | } else { |
56007a02 | 985 | struct ieee80211_bss *bss; |
04fe2037 | 986 | int maxslp = 1; |
56007a02 | 987 | u8 dtimper; |
04fe2037 | 988 | |
56007a02 JB |
989 | bss = (void *)found->u.mgd.associated->priv; |
990 | dtimper = bss->dtim_period; | |
991 | ||
992 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
993 | if (!dtimper) | |
994 | dtimper = 1; | |
995 | else if (dtimper > 1) | |
04fe2037 JB |
996 | maxslp = min_t(int, dtimper, |
997 | latency / beaconint_us); | |
998 | ||
9ccebe61 | 999 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 1000 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 1001 | local->ps_sdata = found; |
04fe2037 | 1002 | } |
10f644a4 | 1003 | } else { |
965bedad | 1004 | local->ps_sdata = NULL; |
10f644a4 | 1005 | } |
965bedad JB |
1006 | |
1007 | ieee80211_change_ps(local); | |
1008 | } | |
1009 | ||
1010 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
1011 | { | |
1012 | struct ieee80211_local *local = | |
1013 | container_of(work, struct ieee80211_local, | |
1014 | dynamic_ps_disable_work); | |
1015 | ||
1016 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1017 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1018 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1019 | } | |
1020 | ||
1021 | ieee80211_wake_queues_by_reason(&local->hw, | |
1022 | IEEE80211_QUEUE_STOP_REASON_PS); | |
1023 | } | |
1024 | ||
1025 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1026 | { | |
1027 | struct ieee80211_local *local = | |
1028 | container_of(work, struct ieee80211_local, | |
1029 | dynamic_ps_enable_work); | |
1030 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
5e34069c | 1031 | struct ieee80211_if_managed *ifmgd; |
1ddc2867 RM |
1032 | unsigned long flags; |
1033 | int q; | |
965bedad JB |
1034 | |
1035 | /* can only happen when PS was just disabled anyway */ | |
1036 | if (!sdata) | |
1037 | return; | |
1038 | ||
5e34069c CL |
1039 | ifmgd = &sdata->u.mgd; |
1040 | ||
965bedad JB |
1041 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
1042 | return; | |
1043 | ||
77b7023a AN |
1044 | if (!local->disable_dynamic_ps && |
1045 | local->hw.conf.dynamic_ps_timeout > 0) { | |
1046 | /* don't enter PS if TX frames are pending */ | |
1047 | if (drv_tx_frames_pending(local)) { | |
1ddc2867 RM |
1048 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1049 | msecs_to_jiffies( | |
1050 | local->hw.conf.dynamic_ps_timeout)); | |
1051 | return; | |
1052 | } | |
77b7023a AN |
1053 | |
1054 | /* | |
1055 | * transmission can be stopped by others which leads to | |
1056 | * dynamic_ps_timer expiry. Postpone the ps timer if it | |
1057 | * is not the actual idle state. | |
1058 | */ | |
1059 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1060 | for (q = 0; q < local->hw.queues; q++) { | |
1061 | if (local->queue_stop_reasons[q]) { | |
1062 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1063 | flags); | |
1064 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1065 | msecs_to_jiffies( | |
1066 | local->hw.conf.dynamic_ps_timeout)); | |
1067 | return; | |
1068 | } | |
1069 | } | |
1070 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1ddc2867 | 1071 | } |
1ddc2867 | 1072 | |
375177bf | 1073 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
9c38a8b4 | 1074 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
f3e85b9e | 1075 | netif_tx_stop_all_queues(sdata->dev); |
965bedad | 1076 | |
e8306f98 VN |
1077 | if (drv_tx_frames_pending(local)) |
1078 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1079 | msecs_to_jiffies( | |
1080 | local->hw.conf.dynamic_ps_timeout)); | |
1081 | else { | |
1082 | ieee80211_send_nullfunc(local, sdata, 1); | |
1083 | /* Flush to get the tx status of nullfunc frame */ | |
1084 | drv_flush(local, false); | |
1085 | } | |
f3e85b9e VN |
1086 | } |
1087 | ||
2a13052f JO |
1088 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
1089 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
375177bf VN |
1090 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1091 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
1092 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
1093 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1094 | } | |
f3e85b9e | 1095 | |
77b7023a AN |
1096 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1097 | netif_tx_wake_all_queues(sdata->dev); | |
965bedad JB |
1098 | } |
1099 | ||
1100 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
1101 | { | |
1102 | struct ieee80211_local *local = (void *) data; | |
1103 | ||
78f1a8b7 | 1104 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
1105 | return; |
1106 | ||
42935eca | 1107 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
1108 | } |
1109 | ||
60f8b39c | 1110 | /* MLME */ |
7d25745d | 1111 | static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, |
4ced3f74 | 1112 | struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1113 | u8 *wmm_param, size_t wmm_param_len) |
1114 | { | |
f0706e82 | 1115 | struct ieee80211_tx_queue_params params; |
4ced3f74 | 1116 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1117 | size_t left; |
1118 | int count; | |
ab13315a | 1119 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 1120 | |
e1b3ec1a | 1121 | if (!local->ops->conf_tx) |
7d25745d | 1122 | return false; |
e1b3ec1a | 1123 | |
32c5057b | 1124 | if (local->hw.queues < IEEE80211_NUM_ACS) |
7d25745d | 1125 | return false; |
3434fbd3 JB |
1126 | |
1127 | if (!wmm_param) | |
7d25745d | 1128 | return false; |
3434fbd3 | 1129 | |
f0706e82 | 1130 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
7d25745d | 1131 | return false; |
ab13315a KV |
1132 | |
1133 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
dc41e4d4 | 1134 | uapsd_queues = ifmgd->uapsd_queues; |
ab13315a | 1135 | |
f0706e82 | 1136 | count = wmm_param[6] & 0x0f; |
46900298 | 1137 | if (count == ifmgd->wmm_last_param_set) |
7d25745d | 1138 | return false; |
46900298 | 1139 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
1140 | |
1141 | pos = wmm_param + 8; | |
1142 | left = wmm_param_len - 8; | |
1143 | ||
1144 | memset(¶ms, 0, sizeof(params)); | |
1145 | ||
00e96dec | 1146 | sdata->wmm_acm = 0; |
f0706e82 JB |
1147 | for (; left >= 4; left -= 4, pos += 4) { |
1148 | int aci = (pos[0] >> 5) & 0x03; | |
1149 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 1150 | bool uapsd = false; |
f0706e82 JB |
1151 | int queue; |
1152 | ||
1153 | switch (aci) { | |
0eeb59fe | 1154 | case 1: /* AC_BK */ |
e100bb64 | 1155 | queue = 3; |
988c0f72 | 1156 | if (acm) |
00e96dec | 1157 | sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
1158 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
1159 | uapsd = true; | |
f0706e82 | 1160 | break; |
0eeb59fe | 1161 | case 2: /* AC_VI */ |
e100bb64 | 1162 | queue = 1; |
988c0f72 | 1163 | if (acm) |
00e96dec | 1164 | sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
1165 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
1166 | uapsd = true; | |
f0706e82 | 1167 | break; |
0eeb59fe | 1168 | case 3: /* AC_VO */ |
e100bb64 | 1169 | queue = 0; |
988c0f72 | 1170 | if (acm) |
00e96dec | 1171 | sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
1172 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
1173 | uapsd = true; | |
f0706e82 | 1174 | break; |
0eeb59fe | 1175 | case 0: /* AC_BE */ |
f0706e82 | 1176 | default: |
e100bb64 | 1177 | queue = 2; |
988c0f72 | 1178 | if (acm) |
00e96dec | 1179 | sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
1180 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
1181 | uapsd = true; | |
f0706e82 JB |
1182 | break; |
1183 | } | |
1184 | ||
1185 | params.aifs = pos[0] & 0x0f; | |
1186 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
1187 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 1188 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
1189 | params.uapsd = uapsd; |
1190 | ||
bdcbd8e0 JB |
1191 | mlme_dbg(sdata, |
1192 | "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n", | |
1193 | queue, aci, acm, | |
1194 | params.aifs, params.cw_min, params.cw_max, | |
1195 | params.txop, params.uapsd); | |
f6f3def3 EP |
1196 | sdata->tx_conf[queue] = params; |
1197 | if (drv_conf_tx(local, sdata, queue, ¶ms)) | |
bdcbd8e0 JB |
1198 | sdata_err(sdata, |
1199 | "failed to set TX queue parameters for queue %d\n", | |
1200 | queue); | |
f0706e82 | 1201 | } |
e1b3ec1a SG |
1202 | |
1203 | /* enable WMM or activate new settings */ | |
4ced3f74 | 1204 | sdata->vif.bss_conf.qos = true; |
7d25745d | 1205 | return true; |
f0706e82 JB |
1206 | } |
1207 | ||
925e64c3 SG |
1208 | static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) |
1209 | { | |
1210 | lockdep_assert_held(&sdata->local->mtx); | |
1211 | ||
1212 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1213 | IEEE80211_STA_BEACON_POLL); | |
1214 | ieee80211_run_deferred_scan(sdata->local); | |
1215 | } | |
1216 | ||
1217 | static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) | |
1218 | { | |
1219 | mutex_lock(&sdata->local->mtx); | |
1220 | __ieee80211_stop_poll(sdata); | |
1221 | mutex_unlock(&sdata->local->mtx); | |
1222 | } | |
1223 | ||
7a5158ef JB |
1224 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
1225 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 1226 | { |
bda3933a | 1227 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 1228 | u32 changed = 0; |
7a5158ef JB |
1229 | bool use_protection; |
1230 | bool use_short_preamble; | |
1231 | bool use_short_slot; | |
1232 | ||
1233 | if (erp_valid) { | |
1234 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
1235 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
1236 | } else { | |
1237 | use_protection = false; | |
1238 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
1239 | } | |
1240 | ||
1241 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
1242 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
1243 | use_short_slot = true; | |
5628221c | 1244 | |
471b3efd | 1245 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
1246 | bss_conf->use_cts_prot = use_protection; |
1247 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 1248 | } |
7e9ed188 | 1249 | |
d43c7b37 | 1250 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 1251 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 1252 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 1253 | } |
d9430a32 | 1254 | |
7a5158ef | 1255 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
1256 | bss_conf->use_short_slot = use_short_slot; |
1257 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
1258 | } |
1259 | ||
1260 | return changed; | |
1261 | } | |
1262 | ||
f698d856 | 1263 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 1264 | struct cfg80211_bss *cbss, |
ae5eb026 | 1265 | u32 bss_info_changed) |
f0706e82 | 1266 | { |
0c1ad2ca | 1267 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 1268 | struct ieee80211_local *local = sdata->local; |
68542962 | 1269 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
d6f2da5b | 1270 | |
ae5eb026 | 1271 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 1272 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
50ae34a2 | 1273 | bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 1274 | |
7ccc8bd7 FF |
1275 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
1276 | IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); | |
1277 | ||
0c1ad2ca JB |
1278 | sdata->u.mgd.associated = cbss; |
1279 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 1280 | |
17e4ec14 JM |
1281 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
1282 | ||
b291ba11 | 1283 | /* just to be sure */ |
925e64c3 | 1284 | ieee80211_stop_poll(sdata); |
b291ba11 | 1285 | |
9ac19a90 | 1286 | ieee80211_led_assoc(local, 1); |
9306102e | 1287 | |
e5b900d2 JB |
1288 | if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) |
1289 | bss_conf->dtim_period = bss->dtim_period; | |
1290 | else | |
1291 | bss_conf->dtim_period = 0; | |
1292 | ||
68542962 | 1293 | bss_conf->assoc = 1; |
9cef8737 | 1294 | |
a97c13c3 | 1295 | /* Tell the driver to monitor connection quality (if supported) */ |
ea086359 | 1296 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
68542962 | 1297 | bss_conf->cqm_rssi_thold) |
a97c13c3 JO |
1298 | bss_info_changed |= BSS_CHANGED_CQM; |
1299 | ||
68542962 JO |
1300 | /* Enable ARP filtering */ |
1301 | if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) { | |
1302 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; | |
1303 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; | |
1304 | } | |
1305 | ||
ae5eb026 | 1306 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 1307 | |
056508dc JB |
1308 | mutex_lock(&local->iflist_mtx); |
1309 | ieee80211_recalc_ps(local, -1); | |
025e6be2 | 1310 | ieee80211_recalc_smps(local); |
056508dc | 1311 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 1312 | |
8a5b33f5 | 1313 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 1314 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
1315 | } |
1316 | ||
e69e95db | 1317 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
37ad3888 JB |
1318 | u16 stype, u16 reason, bool tx, |
1319 | u8 *frame_buf) | |
aa458d17 | 1320 | { |
46900298 | 1321 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
1322 | struct ieee80211_local *local = sdata->local; |
1323 | struct sta_info *sta; | |
3cc5240b | 1324 | u32 changed = 0; |
aa458d17 | 1325 | |
77fdaa12 JB |
1326 | ASSERT_MGD_MTX(ifmgd); |
1327 | ||
37ad3888 JB |
1328 | if (WARN_ON_ONCE(tx && !frame_buf)) |
1329 | return; | |
1330 | ||
b291ba11 JB |
1331 | if (WARN_ON(!ifmgd->associated)) |
1332 | return; | |
1333 | ||
79543d8e DS |
1334 | ieee80211_stop_poll(sdata); |
1335 | ||
77fdaa12 | 1336 | ifmgd->associated = NULL; |
77fdaa12 JB |
1337 | |
1338 | /* | |
1339 | * we need to commit the associated = NULL change because the | |
1340 | * scan code uses that to determine whether this iface should | |
1341 | * go to/wake up from powersave or not -- and could otherwise | |
1342 | * wake the queues erroneously. | |
1343 | */ | |
1344 | smp_mb(); | |
1345 | ||
1346 | /* | |
1347 | * Thus, we can only afterwards stop the queues -- to account | |
1348 | * for the case where another CPU is finishing a scan at this | |
1349 | * time -- we don't want the scan code to enable queues. | |
1350 | */ | |
aa458d17 | 1351 | |
8a5b33f5 | 1352 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1353 | netif_carrier_off(sdata->dev); |
1354 | ||
2a419056 | 1355 | mutex_lock(&local->sta_mtx); |
88a9e31c | 1356 | sta = sta_info_get(sdata, ifmgd->bssid); |
4cad6c7c | 1357 | if (sta) { |
c2c98fde | 1358 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 1359 | ieee80211_sta_tear_down_BA_sessions(sta, tx); |
4cad6c7c | 1360 | } |
2a419056 | 1361 | mutex_unlock(&local->sta_mtx); |
aa458d17 | 1362 | |
88bc40e8 EP |
1363 | /* |
1364 | * if we want to get out of ps before disassoc (why?) we have | |
1365 | * to do it before sending disassoc, as otherwise the null-packet | |
1366 | * won't be valid. | |
1367 | */ | |
1368 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1369 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1370 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1371 | } | |
1372 | local->ps_sdata = NULL; | |
1373 | ||
f823981e EP |
1374 | /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */ |
1375 | if (tx) | |
1376 | drv_flush(local, false); | |
1377 | ||
37ad3888 JB |
1378 | /* deauthenticate/disassociate now */ |
1379 | if (tx || frame_buf) | |
88a9e31c EP |
1380 | ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, |
1381 | reason, tx, frame_buf); | |
37ad3888 JB |
1382 | |
1383 | /* flush out frame */ | |
1384 | if (tx) | |
1385 | drv_flush(local, false); | |
1386 | ||
88a9e31c EP |
1387 | /* clear bssid only after building the needed mgmt frames */ |
1388 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1389 | ||
37ad3888 JB |
1390 | /* remove AP and TDLS peers */ |
1391 | sta_info_flush(local, sdata); | |
1392 | ||
1393 | /* finally reset all BSS / config parameters */ | |
f5e5bf25 TW |
1394 | changed |= ieee80211_reset_erp_info(sdata); |
1395 | ||
f5e5bf25 | 1396 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1397 | changed |= BSS_CHANGED_ASSOC; |
1398 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1399 | |
413ad50a | 1400 | /* on the next assoc, re-program HT parameters */ |
ef96a842 BG |
1401 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
1402 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); | |
413ad50a | 1403 | |
a8302de9 VT |
1404 | local->power_constr_level = 0; |
1405 | ||
520eb820 KV |
1406 | del_timer_sync(&local->dynamic_ps_timer); |
1407 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1408 | ||
68542962 JO |
1409 | /* Disable ARP filtering */ |
1410 | if (sdata->vif.bss_conf.arp_filter_enabled) { | |
1411 | sdata->vif.bss_conf.arp_filter_enabled = false; | |
1412 | changed |= BSS_CHANGED_ARP_FILTER; | |
1413 | } | |
1414 | ||
3abead59 JB |
1415 | sdata->vif.bss_conf.qos = false; |
1416 | changed |= BSS_CHANGED_QOS; | |
1417 | ||
0aaffa9b JB |
1418 | /* The BSSID (not really interesting) and HT changed */ |
1419 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
ae5eb026 | 1420 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 1421 | |
3cc5240b JB |
1422 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
1423 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); | |
1424 | ieee80211_hw_config(local, 0); | |
1425 | ||
3abead59 JB |
1426 | /* disassociated - set to defaults now */ |
1427 | ieee80211_set_wmm_default(sdata, false); | |
1428 | ||
b9dcf712 JB |
1429 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
1430 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
1431 | del_timer_sync(&sdata->u.mgd.timer); | |
1432 | del_timer_sync(&sdata->u.mgd.chswitch_timer); | |
aa458d17 | 1433 | } |
f0706e82 | 1434 | |
3cf335d5 KV |
1435 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1436 | struct ieee80211_hdr *hdr) | |
1437 | { | |
1438 | /* | |
1439 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1440 | * from AP because we know that the connection is working both ways | |
1441 | * at that time. But multicast frames (and hence also beacons) must | |
1442 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
1443 | * data idle periods for sending the periodic probe request to the |
1444 | * AP we're connected to. | |
3cf335d5 | 1445 | */ |
b291ba11 JB |
1446 | if (is_multicast_ether_addr(hdr->addr1)) |
1447 | return; | |
1448 | ||
be099e82 | 1449 | ieee80211_sta_reset_conn_monitor(sdata); |
3cf335d5 | 1450 | } |
f0706e82 | 1451 | |
4e5ff376 FF |
1452 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
1453 | { | |
1454 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
133d40f9 | 1455 | struct ieee80211_local *local = sdata->local; |
4e5ff376 | 1456 | |
133d40f9 | 1457 | mutex_lock(&local->mtx); |
4e5ff376 | 1458 | if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
133d40f9 SG |
1459 | IEEE80211_STA_CONNECTION_POLL))) { |
1460 | mutex_unlock(&local->mtx); | |
1461 | return; | |
1462 | } | |
4e5ff376 | 1463 | |
925e64c3 | 1464 | __ieee80211_stop_poll(sdata); |
133d40f9 SG |
1465 | |
1466 | mutex_lock(&local->iflist_mtx); | |
1467 | ieee80211_recalc_ps(local, -1); | |
1468 | mutex_unlock(&local->iflist_mtx); | |
4e5ff376 FF |
1469 | |
1470 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
133d40f9 | 1471 | goto out; |
4e5ff376 FF |
1472 | |
1473 | /* | |
1474 | * We've received a probe response, but are not sure whether | |
1475 | * we have or will be receiving any beacons or data, so let's | |
1476 | * schedule the timers again, just in case. | |
1477 | */ | |
1478 | ieee80211_sta_reset_beacon_monitor(sdata); | |
1479 | ||
1480 | mod_timer(&ifmgd->conn_mon_timer, | |
1481 | round_jiffies_up(jiffies + | |
1482 | IEEE80211_CONNECTION_IDLE_TIME)); | |
133d40f9 | 1483 | out: |
133d40f9 | 1484 | mutex_unlock(&local->mtx); |
4e5ff376 FF |
1485 | } |
1486 | ||
1487 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, | |
04ac3c0e | 1488 | struct ieee80211_hdr *hdr, bool ack) |
4e5ff376 | 1489 | { |
75706d0e | 1490 | if (!ieee80211_is_data(hdr->frame_control)) |
4e5ff376 FF |
1491 | return; |
1492 | ||
04ac3c0e FF |
1493 | if (ack) |
1494 | ieee80211_sta_reset_conn_monitor(sdata); | |
4e5ff376 FF |
1495 | |
1496 | if (ieee80211_is_nullfunc(hdr->frame_control) && | |
1497 | sdata->u.mgd.probe_send_count > 0) { | |
04ac3c0e FF |
1498 | if (ack) |
1499 | sdata->u.mgd.probe_send_count = 0; | |
1500 | else | |
1501 | sdata->u.mgd.nullfunc_failed = true; | |
4e5ff376 FF |
1502 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
1503 | } | |
1504 | } | |
1505 | ||
a43abf29 ML |
1506 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1507 | { | |
1508 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1509 | const u8 *ssid; | |
f01a067d | 1510 | u8 *dst = ifmgd->associated->bssid; |
180205bd | 1511 | u8 unicast_limit = max(1, max_probe_tries - 3); |
f01a067d LR |
1512 | |
1513 | /* | |
1514 | * Try sending broadcast probe requests for the last three | |
1515 | * probe requests after the first ones failed since some | |
1516 | * buggy APs only support broadcast probe requests. | |
1517 | */ | |
1518 | if (ifmgd->probe_send_count >= unicast_limit) | |
1519 | dst = NULL; | |
a43abf29 | 1520 | |
4e5ff376 FF |
1521 | /* |
1522 | * When the hardware reports an accurate Tx ACK status, it's | |
1523 | * better to send a nullfunc frame instead of a probe request, | |
1524 | * as it will kick us off the AP quickly if we aren't associated | |
1525 | * anymore. The timeout will be reset if the frame is ACKed by | |
1526 | * the AP. | |
1527 | */ | |
992e68bf SD |
1528 | ifmgd->probe_send_count++; |
1529 | ||
04ac3c0e FF |
1530 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
1531 | ifmgd->nullfunc_failed = false; | |
4e5ff376 | 1532 | ieee80211_send_nullfunc(sdata->local, sdata, 0); |
04ac3c0e | 1533 | } else { |
88c868c4 SG |
1534 | int ssid_len; |
1535 | ||
4e5ff376 | 1536 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
88c868c4 SG |
1537 | if (WARN_ON_ONCE(ssid == NULL)) |
1538 | ssid_len = 0; | |
1539 | else | |
1540 | ssid_len = ssid[1]; | |
1541 | ||
1542 | ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, | |
1543 | 0, (u32) -1, true, false); | |
4e5ff376 | 1544 | } |
a43abf29 | 1545 | |
180205bd | 1546 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
a43abf29 | 1547 | run_again(ifmgd, ifmgd->probe_timeout); |
f69b9c79 RM |
1548 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
1549 | drv_flush(sdata->local, false); | |
a43abf29 ML |
1550 | } |
1551 | ||
b291ba11 JB |
1552 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1553 | bool beacon) | |
04de8381 | 1554 | { |
04de8381 | 1555 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 1556 | bool already = false; |
34bfc411 | 1557 | |
9607e6b6 | 1558 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
1559 | return; |
1560 | ||
77fdaa12 JB |
1561 | mutex_lock(&ifmgd->mtx); |
1562 | ||
1563 | if (!ifmgd->associated) | |
1564 | goto out; | |
1565 | ||
133d40f9 SG |
1566 | mutex_lock(&sdata->local->mtx); |
1567 | ||
1568 | if (sdata->local->tmp_channel || sdata->local->scanning) { | |
1569 | mutex_unlock(&sdata->local->mtx); | |
1570 | goto out; | |
1571 | } | |
1572 | ||
e87cc472 | 1573 | if (beacon) |
bdcbd8e0 JB |
1574 | mlme_dbg_ratelimited(sdata, |
1575 | "detected beacon loss from AP - sending probe request\n"); | |
1576 | ||
6efb71b0 HS |
1577 | ieee80211_cqm_rssi_notify(&sdata->vif, |
1578 | NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL); | |
04de8381 | 1579 | |
b291ba11 JB |
1580 | /* |
1581 | * The driver/our work has already reported this event or the | |
1582 | * connection monitoring has kicked in and we have already sent | |
1583 | * a probe request. Or maybe the AP died and the driver keeps | |
1584 | * reporting until we disassociate... | |
1585 | * | |
1586 | * In either case we have to ignore the current call to this | |
1587 | * function (except for setting the correct probe reason bit) | |
1588 | * because otherwise we would reset the timer every time and | |
1589 | * never check whether we received a probe response! | |
1590 | */ | |
1591 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1592 | IEEE80211_STA_CONNECTION_POLL)) | |
1593 | already = true; | |
1594 | ||
1595 | if (beacon) | |
1596 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
1597 | else | |
1598 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
1599 | ||
133d40f9 SG |
1600 | mutex_unlock(&sdata->local->mtx); |
1601 | ||
b291ba11 JB |
1602 | if (already) |
1603 | goto out; | |
1604 | ||
4e751843 JB |
1605 | mutex_lock(&sdata->local->iflist_mtx); |
1606 | ieee80211_recalc_ps(sdata->local, -1); | |
1607 | mutex_unlock(&sdata->local->iflist_mtx); | |
1608 | ||
a43abf29 ML |
1609 | ifmgd->probe_send_count = 0; |
1610 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
1611 | out: |
1612 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
1613 | } |
1614 | ||
a619a4c0 JO |
1615 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
1616 | struct ieee80211_vif *vif) | |
1617 | { | |
1618 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1619 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
d9b3b28b | 1620 | struct cfg80211_bss *cbss; |
a619a4c0 JO |
1621 | struct sk_buff *skb; |
1622 | const u8 *ssid; | |
88c868c4 | 1623 | int ssid_len; |
a619a4c0 JO |
1624 | |
1625 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1626 | return NULL; | |
1627 | ||
1628 | ASSERT_MGD_MTX(ifmgd); | |
1629 | ||
d9b3b28b EP |
1630 | if (ifmgd->associated) |
1631 | cbss = ifmgd->associated; | |
1632 | else if (ifmgd->auth_data) | |
1633 | cbss = ifmgd->auth_data->bss; | |
1634 | else if (ifmgd->assoc_data) | |
1635 | cbss = ifmgd->assoc_data->bss; | |
1636 | else | |
a619a4c0 JO |
1637 | return NULL; |
1638 | ||
d9b3b28b | 1639 | ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); |
88c868c4 SG |
1640 | if (WARN_ON_ONCE(ssid == NULL)) |
1641 | ssid_len = 0; | |
1642 | else | |
1643 | ssid_len = ssid[1]; | |
1644 | ||
d9b3b28b | 1645 | skb = ieee80211_build_probe_req(sdata, cbss->bssid, |
88c868c4 | 1646 | (u32) -1, ssid + 2, ssid_len, |
85a237fe | 1647 | NULL, 0, true); |
a619a4c0 JO |
1648 | |
1649 | return skb; | |
1650 | } | |
1651 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); | |
1652 | ||
1e4dcd01 JO |
1653 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
1654 | { | |
1655 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1656 | struct ieee80211_local *local = sdata->local; | |
1657 | u8 bssid[ETH_ALEN]; | |
5fef7dbc | 1658 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
1e4dcd01 JO |
1659 | |
1660 | mutex_lock(&ifmgd->mtx); | |
1661 | if (!ifmgd->associated) { | |
1662 | mutex_unlock(&ifmgd->mtx); | |
1663 | return; | |
1664 | } | |
1665 | ||
1666 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
1667 | ||
bdcbd8e0 | 1668 | sdata_info(sdata, "Connection to AP %pM lost\n", bssid); |
1e4dcd01 | 1669 | |
37ad3888 JB |
1670 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
1671 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
1672 | false, frame_buf); | |
1e4dcd01 | 1673 | mutex_unlock(&ifmgd->mtx); |
7da7cc1d | 1674 | |
1e4dcd01 JO |
1675 | /* |
1676 | * must be outside lock due to cfg80211, | |
1677 | * but that's not a problem. | |
1678 | */ | |
5fef7dbc | 1679 | cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
fcac4fb0 FF |
1680 | |
1681 | mutex_lock(&local->mtx); | |
1682 | ieee80211_recalc_idle(local); | |
1683 | mutex_unlock(&local->mtx); | |
1e4dcd01 JO |
1684 | } |
1685 | ||
1686 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
b291ba11 JB |
1687 | { |
1688 | struct ieee80211_sub_if_data *sdata = | |
1689 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 1690 | u.mgd.beacon_connection_loss_work); |
a85e1d55 PS |
1691 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1692 | struct sta_info *sta; | |
1693 | ||
1694 | if (ifmgd->associated) { | |
30fa9047 | 1695 | rcu_read_lock(); |
a85e1d55 PS |
1696 | sta = sta_info_get(sdata, ifmgd->bssid); |
1697 | if (sta) | |
1698 | sta->beacon_loss_count++; | |
30fa9047 | 1699 | rcu_read_unlock(); |
a85e1d55 | 1700 | } |
b291ba11 | 1701 | |
1e4dcd01 JO |
1702 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1703 | __ieee80211_connection_loss(sdata); | |
1704 | else | |
1705 | ieee80211_mgd_probe_ap(sdata, true); | |
b291ba11 JB |
1706 | } |
1707 | ||
04de8381 KV |
1708 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1709 | { | |
1710 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 1711 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1712 | |
b5878a2d JB |
1713 | trace_api_beacon_loss(sdata); |
1714 | ||
1e4dcd01 JO |
1715 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1716 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
04de8381 KV |
1717 | } |
1718 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1719 | ||
1e4dcd01 JO |
1720 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1721 | { | |
1722 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1723 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1724 | ||
b5878a2d JB |
1725 | trace_api_connection_loss(sdata); |
1726 | ||
1e4dcd01 JO |
1727 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); |
1728 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
1729 | } | |
1730 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1731 | ||
1732 | ||
66e67e41 JB |
1733 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
1734 | bool assoc) | |
1735 | { | |
1736 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1737 | ||
1738 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1739 | ||
66e67e41 JB |
1740 | if (!assoc) { |
1741 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); | |
1742 | ||
1743 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1744 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
1745 | } | |
1746 | ||
1747 | cfg80211_put_bss(auth_data->bss); | |
1748 | kfree(auth_data); | |
1749 | sdata->u.mgd.auth_data = NULL; | |
1750 | } | |
1751 | ||
1752 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
1753 | struct ieee80211_mgmt *mgmt, size_t len) | |
1754 | { | |
1755 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1756 | u8 *pos; | |
1757 | struct ieee802_11_elems elems; | |
1758 | ||
1759 | pos = mgmt->u.auth.variable; | |
1760 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1761 | if (!elems.challenge) | |
1762 | return; | |
1763 | auth_data->expected_transaction = 4; | |
a1845fc7 | 1764 | drv_mgd_prepare_tx(sdata->local, sdata); |
66e67e41 JB |
1765 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, |
1766 | elems.challenge - 2, elems.challenge_len + 2, | |
1767 | auth_data->bss->bssid, auth_data->bss->bssid, | |
1768 | auth_data->key, auth_data->key_len, | |
1769 | auth_data->key_idx); | |
1770 | } | |
1771 | ||
1772 | static enum rx_mgmt_action __must_check | |
1773 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1774 | struct ieee80211_mgmt *mgmt, size_t len) | |
1775 | { | |
1776 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1777 | u8 bssid[ETH_ALEN]; | |
1778 | u16 auth_alg, auth_transaction, status_code; | |
1779 | struct sta_info *sta; | |
1780 | ||
1781 | lockdep_assert_held(&ifmgd->mtx); | |
1782 | ||
1783 | if (len < 24 + 6) | |
1784 | return RX_MGMT_NONE; | |
1785 | ||
1786 | if (!ifmgd->auth_data || ifmgd->auth_data->done) | |
1787 | return RX_MGMT_NONE; | |
1788 | ||
1789 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
1790 | ||
b203ca39 | 1791 | if (!ether_addr_equal(bssid, mgmt->bssid)) |
66e67e41 JB |
1792 | return RX_MGMT_NONE; |
1793 | ||
1794 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1795 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1796 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1797 | ||
1798 | if (auth_alg != ifmgd->auth_data->algorithm || | |
1799 | auth_transaction != ifmgd->auth_data->expected_transaction) | |
1800 | return RX_MGMT_NONE; | |
1801 | ||
1802 | if (status_code != WLAN_STATUS_SUCCESS) { | |
bdcbd8e0 JB |
1803 | sdata_info(sdata, "%pM denied authentication (status %d)\n", |
1804 | mgmt->sa, status_code); | |
dac211ec EP |
1805 | ieee80211_destroy_auth_data(sdata, false); |
1806 | return RX_MGMT_CFG80211_RX_AUTH; | |
66e67e41 JB |
1807 | } |
1808 | ||
1809 | switch (ifmgd->auth_data->algorithm) { | |
1810 | case WLAN_AUTH_OPEN: | |
1811 | case WLAN_AUTH_LEAP: | |
1812 | case WLAN_AUTH_FT: | |
1813 | break; | |
1814 | case WLAN_AUTH_SHARED_KEY: | |
1815 | if (ifmgd->auth_data->expected_transaction != 4) { | |
1816 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1817 | /* need another frame */ | |
1818 | return RX_MGMT_NONE; | |
1819 | } | |
1820 | break; | |
1821 | default: | |
1822 | WARN_ONCE(1, "invalid auth alg %d", | |
1823 | ifmgd->auth_data->algorithm); | |
1824 | return RX_MGMT_NONE; | |
1825 | } | |
1826 | ||
bdcbd8e0 | 1827 | sdata_info(sdata, "authenticated\n"); |
66e67e41 JB |
1828 | ifmgd->auth_data->done = true; |
1829 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; | |
1830 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
1831 | ||
1832 | /* move station state to auth */ | |
1833 | mutex_lock(&sdata->local->sta_mtx); | |
1834 | sta = sta_info_get(sdata, bssid); | |
1835 | if (!sta) { | |
1836 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); | |
1837 | goto out_err; | |
1838 | } | |
1839 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { | |
bdcbd8e0 | 1840 | sdata_info(sdata, "failed moving %pM to auth\n", bssid); |
66e67e41 JB |
1841 | goto out_err; |
1842 | } | |
1843 | mutex_unlock(&sdata->local->sta_mtx); | |
1844 | ||
1845 | return RX_MGMT_CFG80211_RX_AUTH; | |
1846 | out_err: | |
1847 | mutex_unlock(&sdata->local->sta_mtx); | |
1848 | /* ignore frame -- wait for timeout */ | |
1849 | return RX_MGMT_NONE; | |
1850 | } | |
1851 | ||
1852 | ||
77fdaa12 JB |
1853 | static enum rx_mgmt_action __must_check |
1854 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 1855 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1856 | { |
46900298 | 1857 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 1858 | const u8 *bssid = NULL; |
f0706e82 JB |
1859 | u16 reason_code; |
1860 | ||
66e67e41 JB |
1861 | lockdep_assert_held(&ifmgd->mtx); |
1862 | ||
f4ea83dd | 1863 | if (len < 24 + 2) |
77fdaa12 | 1864 | return RX_MGMT_NONE; |
f0706e82 | 1865 | |
66e67e41 | 1866 | if (!ifmgd->associated || |
b203ca39 | 1867 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
66e67e41 | 1868 | return RX_MGMT_NONE; |
77fdaa12 | 1869 | |
0c1ad2ca | 1870 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
1871 | |
1872 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1873 | ||
bdcbd8e0 JB |
1874 | sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n", |
1875 | bssid, reason_code); | |
77fdaa12 | 1876 | |
37ad3888 JB |
1877 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
1878 | ||
7da7cc1d | 1879 | mutex_lock(&sdata->local->mtx); |
63f170e0 | 1880 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1881 | mutex_unlock(&sdata->local->mtx); |
f0706e82 | 1882 | |
77fdaa12 | 1883 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
1884 | } |
1885 | ||
1886 | ||
77fdaa12 JB |
1887 | static enum rx_mgmt_action __must_check |
1888 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1889 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1890 | { |
46900298 | 1891 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1892 | u16 reason_code; |
1893 | ||
66e67e41 | 1894 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 | 1895 | |
66e67e41 | 1896 | if (len < 24 + 2) |
77fdaa12 JB |
1897 | return RX_MGMT_NONE; |
1898 | ||
66e67e41 | 1899 | if (!ifmgd->associated || |
b203ca39 | 1900 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
77fdaa12 | 1901 | return RX_MGMT_NONE; |
f0706e82 JB |
1902 | |
1903 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1904 | ||
bdcbd8e0 JB |
1905 | sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", |
1906 | mgmt->sa, reason_code); | |
f0706e82 | 1907 | |
37ad3888 JB |
1908 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
1909 | ||
7da7cc1d | 1910 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 1911 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1912 | mutex_unlock(&sdata->local->mtx); |
37ad3888 | 1913 | |
77fdaa12 | 1914 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
1915 | } |
1916 | ||
c74d084f CL |
1917 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
1918 | u8 *supp_rates, unsigned int supp_rates_len, | |
1919 | u32 *rates, u32 *basic_rates, | |
1920 | bool *have_higher_than_11mbit, | |
1921 | int *min_rate, int *min_rate_index) | |
1922 | { | |
1923 | int i, j; | |
1924 | ||
1925 | for (i = 0; i < supp_rates_len; i++) { | |
1926 | int rate = (supp_rates[i] & 0x7f) * 5; | |
1927 | bool is_basic = !!(supp_rates[i] & 0x80); | |
1928 | ||
1929 | if (rate > 110) | |
1930 | *have_higher_than_11mbit = true; | |
1931 | ||
1932 | /* | |
1933 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 | |
1934 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. | |
1935 | * | |
1936 | * Note: Even through the membership selector and the basic | |
1937 | * rate flag share the same bit, they are not exactly | |
1938 | * the same. | |
1939 | */ | |
1940 | if (!!(supp_rates[i] & 0x80) && | |
1941 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1942 | continue; | |
1943 | ||
1944 | for (j = 0; j < sband->n_bitrates; j++) { | |
1945 | if (sband->bitrates[j].bitrate == rate) { | |
1946 | *rates |= BIT(j); | |
1947 | if (is_basic) | |
1948 | *basic_rates |= BIT(j); | |
1949 | if (rate < *min_rate) { | |
1950 | *min_rate = rate; | |
1951 | *min_rate_index = j; | |
1952 | } | |
1953 | break; | |
1954 | } | |
1955 | } | |
1956 | } | |
1957 | } | |
f0706e82 | 1958 | |
66e67e41 JB |
1959 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
1960 | bool assoc) | |
1961 | { | |
1962 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
1963 | ||
1964 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1965 | ||
66e67e41 JB |
1966 | if (!assoc) { |
1967 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); | |
1968 | ||
1969 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1970 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
1971 | } | |
1972 | ||
1973 | kfree(assoc_data); | |
1974 | sdata->u.mgd.assoc_data = NULL; | |
1975 | } | |
1976 | ||
1977 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, | |
1978 | struct cfg80211_bss *cbss, | |
af6b6374 | 1979 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1980 | { |
46900298 | 1981 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1982 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1983 | struct ieee80211_supported_band *sband; |
f0706e82 | 1984 | struct sta_info *sta; |
af6b6374 | 1985 | u8 *pos; |
af6b6374 | 1986 | u16 capab_info, aid; |
f0706e82 | 1987 | struct ieee802_11_elems elems; |
bda3933a | 1988 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1989 | u32 changed = 0; |
c74d084f | 1990 | int err; |
f0706e82 | 1991 | |
af6b6374 | 1992 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1993 | |
f0706e82 | 1994 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1995 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1996 | |
1dd84aa2 | 1997 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
bdcbd8e0 JB |
1998 | sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", |
1999 | aid); | |
1dd84aa2 JB |
2000 | aid &= ~(BIT(15) | BIT(14)); |
2001 | ||
05cb9108 JB |
2002 | ifmgd->broken_ap = false; |
2003 | ||
2004 | if (aid == 0 || aid > IEEE80211_MAX_AID) { | |
bdcbd8e0 JB |
2005 | sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", |
2006 | aid); | |
05cb9108 JB |
2007 | aid = 0; |
2008 | ifmgd->broken_ap = true; | |
2009 | } | |
2010 | ||
af6b6374 JB |
2011 | pos = mgmt->u.assoc_resp.variable; |
2012 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2013 | ||
f0706e82 | 2014 | if (!elems.supp_rates) { |
bdcbd8e0 | 2015 | sdata_info(sdata, "no SuppRates element in AssocResp\n"); |
af6b6374 | 2016 | return false; |
f0706e82 JB |
2017 | } |
2018 | ||
46900298 | 2019 | ifmgd->aid = aid; |
f0706e82 | 2020 | |
2a33bee2 GE |
2021 | mutex_lock(&sdata->local->sta_mtx); |
2022 | /* | |
2023 | * station info was already allocated and inserted before | |
2024 | * the association and should be available to us | |
2025 | */ | |
7852e361 | 2026 | sta = sta_info_get(sdata, cbss->bssid); |
2a33bee2 GE |
2027 | if (WARN_ON(!sta)) { |
2028 | mutex_unlock(&sdata->local->sta_mtx); | |
af6b6374 | 2029 | return false; |
77fdaa12 | 2030 | } |
05e5e883 | 2031 | |
66e67e41 | 2032 | sband = local->hw.wiphy->bands[local->oper_channel->band]; |
f709fc69 | 2033 | |
ab1faead | 2034 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ef96a842 | 2035 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
d9fe60de | 2036 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 | 2037 | |
64f68e5d JB |
2038 | sta->supports_40mhz = |
2039 | sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2040 | ||
4b7679a5 | 2041 | rate_control_rate_init(sta); |
f0706e82 | 2042 | |
46900298 | 2043 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
c2c98fde | 2044 | set_sta_flag(sta, WLAN_STA_MFP); |
5394af4d | 2045 | |
ddf4ac53 | 2046 | if (elems.wmm_param) |
c2c98fde | 2047 | set_sta_flag(sta, WLAN_STA_WME); |
ddf4ac53 | 2048 | |
c8987876 JB |
2049 | err = sta_info_move_state(sta, IEEE80211_STA_AUTH); |
2050 | if (!err) | |
2051 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); | |
2052 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
2053 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
2054 | if (err) { | |
bdcbd8e0 JB |
2055 | sdata_info(sdata, |
2056 | "failed to move station %pM to desired state\n", | |
2057 | sta->sta.addr); | |
c8987876 JB |
2058 | WARN_ON(__sta_info_destroy(sta)); |
2059 | mutex_unlock(&sdata->local->sta_mtx); | |
2060 | return false; | |
2061 | } | |
2062 | ||
7852e361 | 2063 | mutex_unlock(&sdata->local->sta_mtx); |
ddf4ac53 | 2064 | |
f2176d72 JO |
2065 | /* |
2066 | * Always handle WMM once after association regardless | |
2067 | * of the first value the AP uses. Setting -1 here has | |
2068 | * that effect because the AP values is an unsigned | |
2069 | * 4-bit value. | |
2070 | */ | |
2071 | ifmgd->wmm_last_param_set = -1; | |
2072 | ||
ddf4ac53 | 2073 | if (elems.wmm_param) |
4ced3f74 | 2074 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
60f8b39c | 2075 | elems.wmm_param_len); |
aa837e1d | 2076 | else |
3abead59 JB |
2077 | ieee80211_set_wmm_default(sdata, false); |
2078 | changed |= BSS_CHANGED_QOS; | |
f0706e82 | 2079 | |
074d46d1 | 2080 | if (elems.ht_operation && elems.wmm_param && |
ab1faead | 2081 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
24398e39 JB |
2082 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2083 | cbss->bssid, false); | |
ae5eb026 | 2084 | |
60f8b39c JB |
2085 | /* set AID and assoc capability, |
2086 | * ieee80211_set_associated() will tell the driver */ | |
2087 | bss_conf->aid = aid; | |
2088 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 2089 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 2090 | |
d524215f FF |
2091 | /* |
2092 | * If we're using 4-addr mode, let the AP know that we're | |
2093 | * doing so, so that it can create the STA VLAN on its side | |
2094 | */ | |
2095 | if (ifmgd->use_4addr) | |
2096 | ieee80211_send_4addr_nullfunc(local, sdata); | |
2097 | ||
15b7b062 | 2098 | /* |
b291ba11 JB |
2099 | * Start timer to probe the connection to the AP now. |
2100 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 2101 | */ |
b291ba11 | 2102 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
d3a910a8 | 2103 | ieee80211_sta_reset_beacon_monitor(sdata); |
15b7b062 | 2104 | |
af6b6374 | 2105 | return true; |
f0706e82 JB |
2106 | } |
2107 | ||
66e67e41 JB |
2108 | static enum rx_mgmt_action __must_check |
2109 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
2110 | struct ieee80211_mgmt *mgmt, size_t len, | |
2111 | struct cfg80211_bss **bss) | |
2112 | { | |
2113 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2114 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
2115 | u16 capab_info, status_code, aid; | |
2116 | struct ieee802_11_elems elems; | |
2117 | u8 *pos; | |
2118 | bool reassoc; | |
2119 | ||
2120 | lockdep_assert_held(&ifmgd->mtx); | |
2121 | ||
2122 | if (!assoc_data) | |
2123 | return RX_MGMT_NONE; | |
b203ca39 | 2124 | if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) |
66e67e41 JB |
2125 | return RX_MGMT_NONE; |
2126 | ||
2127 | /* | |
2128 | * AssocResp and ReassocResp have identical structure, so process both | |
2129 | * of them in this function. | |
2130 | */ | |
2131 | ||
2132 | if (len < 24 + 6) | |
2133 | return RX_MGMT_NONE; | |
2134 | ||
2135 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); | |
2136 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2137 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2138 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
2139 | ||
bdcbd8e0 JB |
2140 | sdata_info(sdata, |
2141 | "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", | |
2142 | reassoc ? "Rea" : "A", mgmt->sa, | |
2143 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
66e67e41 JB |
2144 | |
2145 | pos = mgmt->u.assoc_resp.variable; | |
2146 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2147 | ||
2148 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
2149 | elems.timeout_int && elems.timeout_int_len == 5 && | |
2150 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
2151 | u32 tu, ms; | |
2152 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
2153 | ms = tu * 1024 / 1000; | |
bdcbd8e0 JB |
2154 | sdata_info(sdata, |
2155 | "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", | |
2156 | mgmt->sa, tu, ms); | |
66e67e41 JB |
2157 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); |
2158 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
2159 | run_again(ifmgd, assoc_data->timeout); | |
2160 | return RX_MGMT_NONE; | |
2161 | } | |
2162 | ||
2163 | *bss = assoc_data->bss; | |
2164 | ||
2165 | if (status_code != WLAN_STATUS_SUCCESS) { | |
bdcbd8e0 JB |
2166 | sdata_info(sdata, "%pM denied association (code=%d)\n", |
2167 | mgmt->sa, status_code); | |
66e67e41 JB |
2168 | ieee80211_destroy_assoc_data(sdata, false); |
2169 | } else { | |
66e67e41 JB |
2170 | if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) { |
2171 | /* oops -- internal error -- send timeout for now */ | |
10a9109f | 2172 | ieee80211_destroy_assoc_data(sdata, false); |
66e67e41 JB |
2173 | cfg80211_put_bss(*bss); |
2174 | return RX_MGMT_CFG80211_ASSOC_TIMEOUT; | |
2175 | } | |
635d999f | 2176 | sdata_info(sdata, "associated\n"); |
79ebfb85 JB |
2177 | |
2178 | /* | |
2179 | * destroy assoc_data afterwards, as otherwise an idle | |
2180 | * recalc after assoc_data is NULL but before associated | |
2181 | * is set can cause the interface to go idle | |
2182 | */ | |
2183 | ieee80211_destroy_assoc_data(sdata, true); | |
66e67e41 JB |
2184 | } |
2185 | ||
2186 | return RX_MGMT_CFG80211_RX_ASSOC; | |
2187 | } | |
98c8fccf JB |
2188 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
2189 | struct ieee80211_mgmt *mgmt, | |
2190 | size_t len, | |
2191 | struct ieee80211_rx_status *rx_status, | |
2192 | struct ieee802_11_elems *elems, | |
2193 | bool beacon) | |
2194 | { | |
2195 | struct ieee80211_local *local = sdata->local; | |
2196 | int freq; | |
c2b13452 | 2197 | struct ieee80211_bss *bss; |
98c8fccf | 2198 | struct ieee80211_channel *channel; |
56007a02 JB |
2199 | bool need_ps = false; |
2200 | ||
66e67e41 | 2201 | if (sdata->u.mgd.associated && |
b203ca39 | 2202 | ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) { |
56007a02 JB |
2203 | bss = (void *)sdata->u.mgd.associated->priv; |
2204 | /* not previously set so we may need to recalc */ | |
2205 | need_ps = !bss->dtim_period; | |
2206 | } | |
98c8fccf JB |
2207 | |
2208 | if (elems->ds_params && elems->ds_params_len == 1) | |
59eb21a6 BR |
2209 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
2210 | rx_status->band); | |
98c8fccf JB |
2211 | else |
2212 | freq = rx_status->freq; | |
2213 | ||
2214 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2215 | ||
2216 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2217 | return; | |
2218 | ||
98c8fccf | 2219 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 2220 | channel, beacon); |
77fdaa12 JB |
2221 | if (bss) |
2222 | ieee80211_rx_bss_put(local, bss); | |
2223 | ||
2224 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
2225 | return; |
2226 | ||
56007a02 JB |
2227 | if (need_ps) { |
2228 | mutex_lock(&local->iflist_mtx); | |
2229 | ieee80211_recalc_ps(local, -1); | |
2230 | mutex_unlock(&local->iflist_mtx); | |
2231 | } | |
2232 | ||
c481ec97 | 2233 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 2234 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 2235 | ETH_ALEN) == 0)) { |
c481ec97 S |
2236 | struct ieee80211_channel_sw_ie *sw_elem = |
2237 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
5ce6e438 JB |
2238 | ieee80211_sta_process_chanswitch(sdata, sw_elem, |
2239 | bss, rx_status->mactime); | |
c481ec97 | 2240 | } |
f0706e82 JB |
2241 | } |
2242 | ||
2243 | ||
f698d856 | 2244 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 2245 | struct sk_buff *skb) |
f0706e82 | 2246 | { |
af6b6374 | 2247 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 2248 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
2249 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
2250 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
2251 | struct ieee802_11_elems elems; |
2252 | ||
15b7b062 KV |
2253 | ifmgd = &sdata->u.mgd; |
2254 | ||
77fdaa12 JB |
2255 | ASSERT_MGD_MTX(ifmgd); |
2256 | ||
b203ca39 | 2257 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) |
8e7cdbb6 TW |
2258 | return; /* ignore ProbeResp to foreign address */ |
2259 | ||
ae6a44e3 EK |
2260 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2261 | if (baselen > len) | |
2262 | return; | |
2263 | ||
2264 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2265 | &elems); | |
2266 | ||
98c8fccf | 2267 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 2268 | |
77fdaa12 | 2269 | if (ifmgd->associated && |
b203ca39 | 2270 | ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
4e5ff376 | 2271 | ieee80211_reset_ap_probe(sdata); |
66e67e41 JB |
2272 | |
2273 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && | |
b203ca39 | 2274 | ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { |
66e67e41 | 2275 | /* got probe response, continue with auth */ |
bdcbd8e0 | 2276 | sdata_info(sdata, "direct probe responded\n"); |
66e67e41 JB |
2277 | ifmgd->auth_data->tries = 0; |
2278 | ifmgd->auth_data->timeout = jiffies; | |
2279 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2280 | } | |
f0706e82 JB |
2281 | } |
2282 | ||
d91f36db JB |
2283 | /* |
2284 | * This is the canonical list of information elements we care about, | |
2285 | * the filter code also gives us all changes to the Microsoft OUI | |
2286 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
2287 | * | |
2288 | * We implement beacon filtering in software since that means we can | |
2289 | * avoid processing the frame here and in cfg80211, and userspace | |
2290 | * will not be able to tell whether the hardware supports it or not. | |
2291 | * | |
2292 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
2293 | * add items it requires. It also needs to be able to tell us to | |
2294 | * look out for other vendor IEs. | |
2295 | */ | |
2296 | static const u64 care_about_ies = | |
1d4df3a5 JB |
2297 | (1ULL << WLAN_EID_COUNTRY) | |
2298 | (1ULL << WLAN_EID_ERP_INFO) | | |
2299 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
2300 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
2301 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
074d46d1 | 2302 | (1ULL << WLAN_EID_HT_OPERATION); |
d91f36db | 2303 | |
f698d856 | 2304 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2305 | struct ieee80211_mgmt *mgmt, |
2306 | size_t len, | |
2307 | struct ieee80211_rx_status *rx_status) | |
2308 | { | |
d91f36db | 2309 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 2310 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
2311 | size_t baselen; |
2312 | struct ieee802_11_elems elems; | |
f698d856 | 2313 | struct ieee80211_local *local = sdata->local; |
471b3efd | 2314 | u32 changed = 0; |
d91f36db | 2315 | bool erp_valid, directed_tim = false; |
7a5158ef | 2316 | u8 erp_value = 0; |
d91f36db | 2317 | u32 ncrc; |
77fdaa12 JB |
2318 | u8 *bssid; |
2319 | ||
66e67e41 | 2320 | lockdep_assert_held(&ifmgd->mtx); |
f0706e82 | 2321 | |
ae6a44e3 EK |
2322 | /* Process beacon from the current BSS */ |
2323 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2324 | if (baselen > len) | |
2325 | return; | |
2326 | ||
d91f36db | 2327 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 2328 | return; |
f0706e82 | 2329 | |
66e67e41 | 2330 | if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon && |
b203ca39 | 2331 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
66e67e41 JB |
2332 | ieee802_11_parse_elems(mgmt->u.beacon.variable, |
2333 | len - baselen, &elems); | |
77fdaa12 | 2334 | |
66e67e41 JB |
2335 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2336 | false); | |
2337 | ifmgd->assoc_data->have_beacon = true; | |
2338 | ifmgd->assoc_data->sent_assoc = false; | |
2339 | /* continue assoc process */ | |
2340 | ifmgd->assoc_data->timeout = jiffies; | |
2341 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2342 | return; | |
2343 | } | |
77fdaa12 | 2344 | |
66e67e41 | 2345 | if (!ifmgd->associated || |
b203ca39 | 2346 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
f0706e82 | 2347 | return; |
66e67e41 | 2348 | bssid = ifmgd->associated->bssid; |
f0706e82 | 2349 | |
17e4ec14 JM |
2350 | /* Track average RSSI from the Beacon frames of the current AP */ |
2351 | ifmgd->last_beacon_signal = rx_status->signal; | |
2352 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
2353 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
3ba06c6f | 2354 | ifmgd->ave_beacon_signal = rx_status->signal * 16; |
17e4ec14 | 2355 | ifmgd->last_cqm_event_signal = 0; |
391a200a | 2356 | ifmgd->count_beacon_signal = 1; |
615f7b9b | 2357 | ifmgd->last_ave_beacon_signal = 0; |
17e4ec14 JM |
2358 | } else { |
2359 | ifmgd->ave_beacon_signal = | |
2360 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
2361 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
2362 | ifmgd->ave_beacon_signal) / 16; | |
391a200a | 2363 | ifmgd->count_beacon_signal++; |
17e4ec14 | 2364 | } |
615f7b9b MV |
2365 | |
2366 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && | |
2367 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { | |
2368 | int sig = ifmgd->ave_beacon_signal; | |
2369 | int last_sig = ifmgd->last_ave_beacon_signal; | |
2370 | ||
2371 | /* | |
2372 | * if signal crosses either of the boundaries, invoke callback | |
2373 | * with appropriate parameters | |
2374 | */ | |
2375 | if (sig > ifmgd->rssi_max_thold && | |
2376 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { | |
2377 | ifmgd->last_ave_beacon_signal = sig; | |
2378 | drv_rssi_callback(local, RSSI_EVENT_HIGH); | |
2379 | } else if (sig < ifmgd->rssi_min_thold && | |
2380 | (last_sig >= ifmgd->rssi_max_thold || | |
2381 | last_sig == 0)) { | |
2382 | ifmgd->last_ave_beacon_signal = sig; | |
2383 | drv_rssi_callback(local, RSSI_EVENT_LOW); | |
2384 | } | |
2385 | } | |
2386 | ||
17e4ec14 | 2387 | if (bss_conf->cqm_rssi_thold && |
391a200a | 2388 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
ea086359 | 2389 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
17e4ec14 JM |
2390 | int sig = ifmgd->ave_beacon_signal / 16; |
2391 | int last_event = ifmgd->last_cqm_event_signal; | |
2392 | int thold = bss_conf->cqm_rssi_thold; | |
2393 | int hyst = bss_conf->cqm_rssi_hyst; | |
2394 | if (sig < thold && | |
2395 | (last_event == 0 || sig < last_event - hyst)) { | |
2396 | ifmgd->last_cqm_event_signal = sig; | |
2397 | ieee80211_cqm_rssi_notify( | |
2398 | &sdata->vif, | |
2399 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
2400 | GFP_KERNEL); | |
2401 | } else if (sig > thold && | |
2402 | (last_event == 0 || sig > last_event + hyst)) { | |
2403 | ifmgd->last_cqm_event_signal = sig; | |
2404 | ieee80211_cqm_rssi_notify( | |
2405 | &sdata->vif, | |
2406 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
2407 | GFP_KERNEL); | |
2408 | } | |
2409 | } | |
2410 | ||
b291ba11 | 2411 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
bdcbd8e0 JB |
2412 | mlme_dbg_ratelimited(sdata, |
2413 | "cancelling probereq poll due to a received beacon\n"); | |
925e64c3 | 2414 | mutex_lock(&local->mtx); |
b291ba11 | 2415 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
925e64c3 SG |
2416 | ieee80211_run_deferred_scan(local); |
2417 | mutex_unlock(&local->mtx); | |
2418 | ||
4e751843 JB |
2419 | mutex_lock(&local->iflist_mtx); |
2420 | ieee80211_recalc_ps(local, -1); | |
2421 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
2422 | } |
2423 | ||
b291ba11 JB |
2424 | /* |
2425 | * Push the beacon loss detection into the future since | |
2426 | * we are processing a beacon from the AP just now. | |
2427 | */ | |
d3a910a8 | 2428 | ieee80211_sta_reset_beacon_monitor(sdata); |
b291ba11 | 2429 | |
d91f36db JB |
2430 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
2431 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
2432 | len - baselen, &elems, | |
2433 | care_about_ies, ncrc); | |
2434 | ||
2435 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
2436 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
2437 | ifmgd->aid); | |
d91f36db | 2438 | |
25c9c875 | 2439 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 2440 | if (directed_tim) { |
572e0012 | 2441 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
70b12f26 RW |
2442 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
2443 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2444 | ieee80211_hw_config(local, | |
2445 | IEEE80211_CONF_CHANGE_PS); | |
2446 | } | |
572e0012 | 2447 | ieee80211_send_nullfunc(local, sdata, 0); |
6f0756a3 | 2448 | } else if (!local->pspolling && sdata->u.mgd.powersave) { |
572e0012 KV |
2449 | local->pspolling = true; |
2450 | ||
2451 | /* | |
2452 | * Here is assumed that the driver will be | |
2453 | * able to send ps-poll frame and receive a | |
2454 | * response even though power save mode is | |
2455 | * enabled, but some drivers might require | |
2456 | * to disable power save here. This needs | |
2457 | * to be investigated. | |
2458 | */ | |
2459 | ieee80211_send_pspoll(local, sdata); | |
2460 | } | |
a97b77b9 VN |
2461 | } |
2462 | } | |
7a5158ef | 2463 | |
d8ec4433 | 2464 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
30196673 JM |
2465 | return; |
2466 | ifmgd->beacon_crc = ncrc; | |
d8ec4433 | 2467 | ifmgd->beacon_crc_valid = true; |
30196673 | 2468 | |
7d25745d JB |
2469 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2470 | true); | |
2471 | ||
2472 | if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, | |
2473 | elems.wmm_param_len)) | |
2474 | changed |= BSS_CHANGED_QOS; | |
2475 | ||
7a5158ef JB |
2476 | if (elems.erp_info && elems.erp_info_len >= 1) { |
2477 | erp_valid = true; | |
2478 | erp_value = elems.erp_info[0]; | |
2479 | } else { | |
2480 | erp_valid = false; | |
50c4afb9 | 2481 | } |
7a5158ef JB |
2482 | changed |= ieee80211_handle_bss_capability(sdata, |
2483 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
2484 | erp_valid, erp_value); | |
f0706e82 | 2485 | |
d3c990fb | 2486 | |
074d46d1 | 2487 | if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param && |
ab1faead | 2488 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 | 2489 | struct ieee80211_supported_band *sband; |
ae5eb026 JB |
2490 | |
2491 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2492 | ||
24398e39 JB |
2493 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2494 | bssid, true); | |
d3c990fb RR |
2495 | } |
2496 | ||
8b19e6ca | 2497 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 2498 | if (elems.country_elem) { |
a8302de9 VT |
2499 | /* TODO: IBSS also needs this */ |
2500 | if (elems.pwr_constr_elem) | |
2501 | ieee80211_handle_pwr_constr(sdata, | |
2502 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
2503 | elems.pwr_constr_elem, | |
2504 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
2505 | } |
2506 | ||
471b3efd | 2507 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2508 | } |
2509 | ||
1fa57d01 JB |
2510 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
2511 | struct sk_buff *skb) | |
f0706e82 | 2512 | { |
77fdaa12 | 2513 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2514 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 2515 | struct ieee80211_mgmt *mgmt; |
66e67e41 | 2516 | struct cfg80211_bss *bss = NULL; |
77fdaa12 | 2517 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
2518 | u16 fc; |
2519 | ||
f0706e82 JB |
2520 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
2521 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2522 | fc = le16_to_cpu(mgmt->frame_control); | |
2523 | ||
77fdaa12 JB |
2524 | mutex_lock(&ifmgd->mtx); |
2525 | ||
66e67e41 JB |
2526 | switch (fc & IEEE80211_FCTL_STYPE) { |
2527 | case IEEE80211_STYPE_BEACON: | |
2528 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); | |
2529 | break; | |
2530 | case IEEE80211_STYPE_PROBE_RESP: | |
2531 | ieee80211_rx_mgmt_probe_resp(sdata, skb); | |
2532 | break; | |
2533 | case IEEE80211_STYPE_AUTH: | |
2534 | rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
2535 | break; | |
2536 | case IEEE80211_STYPE_DEAUTH: | |
2537 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
2538 | break; | |
2539 | case IEEE80211_STYPE_DISASSOC: | |
2540 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
2541 | break; | |
2542 | case IEEE80211_STYPE_ASSOC_RESP: | |
2543 | case IEEE80211_STYPE_REASSOC_RESP: | |
2544 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); | |
2545 | break; | |
2546 | case IEEE80211_STYPE_ACTION: | |
2547 | switch (mgmt->u.action.category) { | |
2548 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
2549 | ieee80211_sta_process_chanswitch(sdata, | |
2550 | &mgmt->u.action.u.chan_switch.sw_elem, | |
2551 | (void *)ifmgd->associated->priv, | |
2552 | rx_status->mactime); | |
77fdaa12 | 2553 | break; |
77fdaa12 | 2554 | } |
77fdaa12 | 2555 | } |
77fdaa12 JB |
2556 | mutex_unlock(&ifmgd->mtx); |
2557 | ||
66e67e41 JB |
2558 | switch (rma) { |
2559 | case RX_MGMT_NONE: | |
2560 | /* no action */ | |
2561 | break; | |
2562 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 2563 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
66e67e41 JB |
2564 | break; |
2565 | case RX_MGMT_CFG80211_DISASSOC: | |
2566 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
2567 | break; | |
2568 | case RX_MGMT_CFG80211_RX_AUTH: | |
2569 | cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len); | |
2570 | break; | |
2571 | case RX_MGMT_CFG80211_RX_ASSOC: | |
2572 | cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len); | |
2573 | break; | |
2574 | case RX_MGMT_CFG80211_ASSOC_TIMEOUT: | |
2575 | cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid); | |
2576 | break; | |
2577 | default: | |
2578 | WARN(1, "unexpected: %d", rma); | |
b054b747 | 2579 | } |
f0706e82 JB |
2580 | } |
2581 | ||
9c6bd790 | 2582 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2583 | { |
60f8b39c JB |
2584 | struct ieee80211_sub_if_data *sdata = |
2585 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2586 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2587 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2588 | |
5bb644a0 JB |
2589 | if (local->quiescing) { |
2590 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2591 | return; | |
2592 | } | |
2593 | ||
64592c8f | 2594 | ieee80211_queue_work(&local->hw, &sdata->work); |
f0706e82 JB |
2595 | } |
2596 | ||
04ac3c0e | 2597 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
95acac61 | 2598 | u8 *bssid, u8 reason) |
04ac3c0e FF |
2599 | { |
2600 | struct ieee80211_local *local = sdata->local; | |
2601 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
5fef7dbc | 2602 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
04ac3c0e | 2603 | |
37ad3888 JB |
2604 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
2605 | false, frame_buf); | |
04ac3c0e | 2606 | mutex_unlock(&ifmgd->mtx); |
37ad3888 | 2607 | |
04ac3c0e FF |
2608 | /* |
2609 | * must be outside lock due to cfg80211, | |
2610 | * but that's not a problem. | |
2611 | */ | |
5fef7dbc | 2612 | cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
fcac4fb0 FF |
2613 | |
2614 | mutex_lock(&local->mtx); | |
2615 | ieee80211_recalc_idle(local); | |
2616 | mutex_unlock(&local->mtx); | |
2617 | ||
04ac3c0e FF |
2618 | mutex_lock(&ifmgd->mtx); |
2619 | } | |
2620 | ||
66e67e41 JB |
2621 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) |
2622 | { | |
2623 | struct ieee80211_local *local = sdata->local; | |
2624 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2625 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; | |
2626 | ||
2627 | lockdep_assert_held(&ifmgd->mtx); | |
2628 | ||
2629 | if (WARN_ON_ONCE(!auth_data)) | |
2630 | return -EINVAL; | |
2631 | ||
66e67e41 JB |
2632 | auth_data->tries++; |
2633 | ||
2634 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { | |
bdcbd8e0 JB |
2635 | sdata_info(sdata, "authentication with %pM timed out\n", |
2636 | auth_data->bss->bssid); | |
66e67e41 JB |
2637 | |
2638 | /* | |
2639 | * Most likely AP is not in the range so remove the | |
2640 | * bss struct for that AP. | |
2641 | */ | |
2642 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); | |
2643 | ||
2644 | return -ETIMEDOUT; | |
2645 | } | |
2646 | ||
a1845fc7 JB |
2647 | drv_mgd_prepare_tx(local, sdata); |
2648 | ||
66e67e41 | 2649 | if (auth_data->bss->proberesp_ies) { |
bdcbd8e0 JB |
2650 | sdata_info(sdata, "send auth to %pM (try %d/%d)\n", |
2651 | auth_data->bss->bssid, auth_data->tries, | |
2652 | IEEE80211_AUTH_MAX_TRIES); | |
66e67e41 JB |
2653 | |
2654 | auth_data->expected_transaction = 2; | |
2655 | ieee80211_send_auth(sdata, 1, auth_data->algorithm, | |
2656 | auth_data->ie, auth_data->ie_len, | |
2657 | auth_data->bss->bssid, | |
2658 | auth_data->bss->bssid, NULL, 0, 0); | |
2659 | } else { | |
2660 | const u8 *ssidie; | |
2661 | ||
bdcbd8e0 JB |
2662 | sdata_info(sdata, "direct probe to %pM (try %d/%i)\n", |
2663 | auth_data->bss->bssid, auth_data->tries, | |
2664 | IEEE80211_AUTH_MAX_TRIES); | |
66e67e41 JB |
2665 | |
2666 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); | |
2667 | if (!ssidie) | |
2668 | return -EINVAL; | |
2669 | /* | |
2670 | * Direct probe is sent to broadcast address as some APs | |
2671 | * will not answer to direct packet in unassociated state. | |
2672 | */ | |
2673 | ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], | |
2674 | NULL, 0, (u32) -1, true, false); | |
2675 | } | |
2676 | ||
2677 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
2678 | run_again(ifmgd, auth_data->timeout); | |
2679 | ||
2680 | return 0; | |
2681 | } | |
2682 | ||
2683 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) | |
2684 | { | |
2685 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2686 | struct ieee80211_local *local = sdata->local; | |
2687 | ||
2688 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
2689 | ||
66e67e41 JB |
2690 | assoc_data->tries++; |
2691 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { | |
bdcbd8e0 JB |
2692 | sdata_info(sdata, "association with %pM timed out\n", |
2693 | assoc_data->bss->bssid); | |
66e67e41 JB |
2694 | |
2695 | /* | |
2696 | * Most likely AP is not in the range so remove the | |
2697 | * bss struct for that AP. | |
2698 | */ | |
2699 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); | |
2700 | ||
2701 | return -ETIMEDOUT; | |
2702 | } | |
2703 | ||
bdcbd8e0 JB |
2704 | sdata_info(sdata, "associate with %pM (try %d/%d)\n", |
2705 | assoc_data->bss->bssid, assoc_data->tries, | |
2706 | IEEE80211_ASSOC_MAX_TRIES); | |
66e67e41 JB |
2707 | ieee80211_send_assoc(sdata); |
2708 | ||
2709 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
2710 | run_again(&sdata->u.mgd, assoc_data->timeout); | |
2711 | ||
2712 | return 0; | |
2713 | } | |
2714 | ||
1fa57d01 | 2715 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
9c6bd790 | 2716 | { |
9c6bd790 | 2717 | struct ieee80211_local *local = sdata->local; |
1fa57d01 | 2718 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2719 | |
77fdaa12 JB |
2720 | mutex_lock(&ifmgd->mtx); |
2721 | ||
66e67e41 JB |
2722 | if (ifmgd->auth_data && |
2723 | time_after(jiffies, ifmgd->auth_data->timeout)) { | |
2724 | if (ifmgd->auth_data->done) { | |
2725 | /* | |
2726 | * ok ... we waited for assoc but userspace didn't, | |
2727 | * so let's just kill the auth data | |
2728 | */ | |
2729 | ieee80211_destroy_auth_data(sdata, false); | |
2730 | } else if (ieee80211_probe_auth(sdata)) { | |
2731 | u8 bssid[ETH_ALEN]; | |
2732 | ||
2733 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
2734 | ||
2735 | ieee80211_destroy_auth_data(sdata, false); | |
2736 | ||
2737 | mutex_unlock(&ifmgd->mtx); | |
2738 | cfg80211_send_auth_timeout(sdata->dev, bssid); | |
2739 | mutex_lock(&ifmgd->mtx); | |
2740 | } | |
2741 | } else if (ifmgd->auth_data) | |
2742 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2743 | ||
2744 | if (ifmgd->assoc_data && | |
2745 | time_after(jiffies, ifmgd->assoc_data->timeout)) { | |
2746 | if (!ifmgd->assoc_data->have_beacon || | |
2747 | ieee80211_do_assoc(sdata)) { | |
2748 | u8 bssid[ETH_ALEN]; | |
2749 | ||
2750 | memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN); | |
2751 | ||
2752 | ieee80211_destroy_assoc_data(sdata, false); | |
2753 | ||
2754 | mutex_unlock(&ifmgd->mtx); | |
2755 | cfg80211_send_assoc_timeout(sdata->dev, bssid); | |
2756 | mutex_lock(&ifmgd->mtx); | |
2757 | } | |
2758 | } else if (ifmgd->assoc_data) | |
2759 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2760 | ||
b291ba11 JB |
2761 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
2762 | IEEE80211_STA_CONNECTION_POLL) && | |
2763 | ifmgd->associated) { | |
a43abf29 | 2764 | u8 bssid[ETH_ALEN]; |
72a8a3ed | 2765 | int max_tries; |
a43abf29 | 2766 | |
0c1ad2ca | 2767 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
4e5ff376 | 2768 | |
72a8a3ed | 2769 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
180205bd | 2770 | max_tries = max_nullfunc_tries; |
72a8a3ed | 2771 | else |
180205bd | 2772 | max_tries = max_probe_tries; |
72a8a3ed | 2773 | |
4e5ff376 FF |
2774 | /* ACK received for nullfunc probing frame */ |
2775 | if (!ifmgd->probe_send_count) | |
2776 | ieee80211_reset_ap_probe(sdata); | |
04ac3c0e FF |
2777 | else if (ifmgd->nullfunc_failed) { |
2778 | if (ifmgd->probe_send_count < max_tries) { | |
bdcbd8e0 JB |
2779 | mlme_dbg(sdata, |
2780 | "No ack for nullfunc frame to AP %pM, try %d/%i\n", | |
2781 | bssid, ifmgd->probe_send_count, | |
2782 | max_tries); | |
04ac3c0e FF |
2783 | ieee80211_mgd_probe_ap_send(sdata); |
2784 | } else { | |
bdcbd8e0 JB |
2785 | mlme_dbg(sdata, |
2786 | "No ack for nullfunc frame to AP %pM, disconnecting.\n", | |
2787 | bssid); | |
95acac61 JB |
2788 | ieee80211_sta_connection_lost(sdata, bssid, |
2789 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e FF |
2790 | } |
2791 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) | |
b291ba11 | 2792 | run_again(ifmgd, ifmgd->probe_timeout); |
04ac3c0e | 2793 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
bdcbd8e0 JB |
2794 | mlme_dbg(sdata, |
2795 | "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", | |
2796 | bssid, probe_wait_ms); | |
95acac61 JB |
2797 | ieee80211_sta_connection_lost(sdata, bssid, |
2798 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e | 2799 | } else if (ifmgd->probe_send_count < max_tries) { |
bdcbd8e0 JB |
2800 | mlme_dbg(sdata, |
2801 | "No probe response from AP %pM after %dms, try %d/%i\n", | |
2802 | bssid, probe_wait_ms, | |
2803 | ifmgd->probe_send_count, max_tries); | |
a43abf29 ML |
2804 | ieee80211_mgd_probe_ap_send(sdata); |
2805 | } else { | |
b291ba11 JB |
2806 | /* |
2807 | * We actually lost the connection ... or did we? | |
2808 | * Let's make sure! | |
2809 | */ | |
b38afa87 BG |
2810 | wiphy_debug(local->hw.wiphy, |
2811 | "%s: No probe response from AP %pM" | |
2812 | " after %dms, disconnecting.\n", | |
2813 | sdata->name, | |
180205bd | 2814 | bssid, probe_wait_ms); |
04ac3c0e | 2815 | |
95acac61 JB |
2816 | ieee80211_sta_connection_lost(sdata, bssid, |
2817 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
b291ba11 JB |
2818 | } |
2819 | } | |
2820 | ||
77fdaa12 | 2821 | mutex_unlock(&ifmgd->mtx); |
66e67e41 JB |
2822 | |
2823 | mutex_lock(&local->mtx); | |
2824 | ieee80211_recalc_idle(local); | |
2825 | mutex_unlock(&local->mtx); | |
f0706e82 JB |
2826 | } |
2827 | ||
b291ba11 JB |
2828 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
2829 | { | |
2830 | struct ieee80211_sub_if_data *sdata = | |
2831 | (struct ieee80211_sub_if_data *) data; | |
2832 | struct ieee80211_local *local = sdata->local; | |
2833 | ||
2834 | if (local->quiescing) | |
2835 | return; | |
2836 | ||
1e4dcd01 JO |
2837 | ieee80211_queue_work(&sdata->local->hw, |
2838 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
2839 | } |
2840 | ||
2841 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
2842 | { | |
2843 | struct ieee80211_sub_if_data *sdata = | |
2844 | (struct ieee80211_sub_if_data *) data; | |
2845 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2846 | struct ieee80211_local *local = sdata->local; | |
2847 | ||
2848 | if (local->quiescing) | |
2849 | return; | |
2850 | ||
42935eca | 2851 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
2852 | } |
2853 | ||
2854 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
2855 | { | |
2856 | struct ieee80211_sub_if_data *sdata = | |
2857 | container_of(work, struct ieee80211_sub_if_data, | |
2858 | u.mgd.monitor_work); | |
2859 | ||
2860 | ieee80211_mgd_probe_ap(sdata, false); | |
2861 | } | |
2862 | ||
9c6bd790 JB |
2863 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2864 | { | |
494f1fe5 EP |
2865 | u32 flags; |
2866 | ||
ad935687 | 2867 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
925e64c3 | 2868 | __ieee80211_stop_poll(sdata); |
ad935687 | 2869 | |
b291ba11 | 2870 | /* let's probe the connection once */ |
494f1fe5 EP |
2871 | flags = sdata->local->hw.flags; |
2872 | if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) | |
2873 | ieee80211_queue_work(&sdata->local->hw, | |
2874 | &sdata->u.mgd.monitor_work); | |
b291ba11 | 2875 | /* and do all the other regular work too */ |
64592c8f | 2876 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
ad935687 | 2877 | } |
9c6bd790 | 2878 | } |
f0706e82 | 2879 | |
5bb644a0 JB |
2880 | #ifdef CONFIG_PM |
2881 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
2882 | { | |
2883 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2884 | ||
2885 | /* | |
2886 | * we need to use atomic bitops for the running bits | |
2887 | * only because both timers might fire at the same | |
2888 | * time -- the code here is properly synchronised. | |
2889 | */ | |
2890 | ||
d1f5b7a3 JB |
2891 | cancel_work_sync(&ifmgd->request_smps_work); |
2892 | ||
0ecfe806 | 2893 | cancel_work_sync(&ifmgd->monitor_work); |
1e4dcd01 | 2894 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
5bb644a0 JB |
2895 | if (del_timer_sync(&ifmgd->timer)) |
2896 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2897 | ||
2898 | cancel_work_sync(&ifmgd->chswitch_work); | |
2899 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
2900 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 | 2901 | |
b291ba11 JB |
2902 | /* these will just be re-established on connection */ |
2903 | del_timer_sync(&ifmgd->conn_mon_timer); | |
2904 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
2905 | } |
2906 | ||
2907 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
2908 | { | |
2909 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2910 | ||
676b58c2 RM |
2911 | if (!ifmgd->associated) |
2912 | return; | |
2913 | ||
95acac61 JB |
2914 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
2915 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; | |
2916 | mutex_lock(&ifmgd->mtx); | |
2917 | if (ifmgd->associated) { | |
bdcbd8e0 JB |
2918 | mlme_dbg(sdata, |
2919 | "driver requested disconnect after resume\n"); | |
95acac61 JB |
2920 | ieee80211_sta_connection_lost(sdata, |
2921 | ifmgd->associated->bssid, | |
2922 | WLAN_REASON_UNSPECIFIED); | |
2923 | mutex_unlock(&ifmgd->mtx); | |
2924 | return; | |
2925 | } | |
2926 | mutex_unlock(&ifmgd->mtx); | |
2927 | } | |
2928 | ||
5bb644a0 JB |
2929 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
2930 | add_timer(&ifmgd->timer); | |
2931 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
2932 | add_timer(&ifmgd->chswitch_timer); | |
c8a7972c | 2933 | ieee80211_sta_reset_beacon_monitor(sdata); |
925e64c3 SG |
2934 | |
2935 | mutex_lock(&sdata->local->mtx); | |
46090979 | 2936 | ieee80211_restart_sta_timer(sdata); |
925e64c3 | 2937 | mutex_unlock(&sdata->local->mtx); |
5bb644a0 JB |
2938 | } |
2939 | #endif | |
2940 | ||
9c6bd790 JB |
2941 | /* interface setup */ |
2942 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2943 | { |
46900298 | 2944 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 2945 | |
46900298 | 2946 | ifmgd = &sdata->u.mgd; |
b291ba11 | 2947 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 2948 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
2949 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
2950 | ieee80211_beacon_connection_loss_work); | |
d1f5b7a3 | 2951 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work); |
46900298 | 2952 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2953 | (unsigned long) sdata); |
b291ba11 JB |
2954 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
2955 | (unsigned long) sdata); | |
2956 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
2957 | (unsigned long) sdata); | |
46900298 | 2958 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2959 | (unsigned long) sdata); |
9c6bd790 | 2960 | |
ab1faead | 2961 | ifmgd->flags = 0; |
1478acb3 | 2962 | ifmgd->powersave = sdata->wdev.ps; |
dc41e4d4 EP |
2963 | ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
2964 | ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; | |
bbbdff9e | 2965 | |
77fdaa12 | 2966 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
2967 | |
2968 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
2969 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
2970 | else | |
2971 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
2972 | } |
2973 | ||
77fdaa12 JB |
2974 | /* scan finished notification */ |
2975 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 2976 | { |
31ee67a1 | 2977 | struct ieee80211_sub_if_data *sdata; |
60f8b39c | 2978 | |
77fdaa12 JB |
2979 | /* Restart STA timers */ |
2980 | rcu_read_lock(); | |
2981 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2982 | ieee80211_restart_sta_timer(sdata); | |
2983 | rcu_read_unlock(); | |
2984 | } | |
60f8b39c | 2985 | |
77fdaa12 JB |
2986 | int ieee80211_max_network_latency(struct notifier_block *nb, |
2987 | unsigned long data, void *dummy) | |
2988 | { | |
2989 | s32 latency_usec = (s32) data; | |
2990 | struct ieee80211_local *local = | |
2991 | container_of(nb, struct ieee80211_local, | |
2992 | network_latency_notifier); | |
1fa6f4af | 2993 | |
77fdaa12 JB |
2994 | mutex_lock(&local->iflist_mtx); |
2995 | ieee80211_recalc_ps(local, latency_usec); | |
2996 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 2997 | |
77fdaa12 | 2998 | return 0; |
9c6bd790 JB |
2999 | } |
3000 | ||
a1cf775d | 3001 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, |
5d6a1b06 | 3002 | struct cfg80211_bss *cbss, bool assoc) |
a1cf775d JB |
3003 | { |
3004 | struct ieee80211_local *local = sdata->local; | |
3005 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
5d6a1b06 | 3006 | struct ieee80211_bss *bss = (void *)cbss->priv; |
6df653c7 | 3007 | struct sta_info *sta = NULL; |
a1cf775d JB |
3008 | bool have_sta = false; |
3009 | int err; | |
24398e39 JB |
3010 | int ht_cfreq; |
3011 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
3012 | const u8 *ht_oper_ie; | |
3013 | const struct ieee80211_ht_operation *ht_oper = NULL; | |
3014 | struct ieee80211_supported_band *sband; | |
a1cf775d JB |
3015 | |
3016 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) | |
3017 | return -EINVAL; | |
3018 | ||
3019 | if (assoc) { | |
3020 | rcu_read_lock(); | |
5d6a1b06 | 3021 | have_sta = sta_info_get(sdata, cbss->bssid); |
a1cf775d JB |
3022 | rcu_read_unlock(); |
3023 | } | |
3024 | ||
3025 | if (!have_sta) { | |
5d6a1b06 | 3026 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
a1cf775d JB |
3027 | if (!sta) |
3028 | return -ENOMEM; | |
3029 | } | |
3030 | ||
3031 | mutex_lock(&local->mtx); | |
3032 | ieee80211_recalc_idle(sdata->local); | |
3033 | mutex_unlock(&local->mtx); | |
3034 | ||
3035 | /* switch to the right channel */ | |
24398e39 JB |
3036 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
3037 | ||
3038 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ; | |
3039 | ||
3040 | if (sband->ht_cap.ht_supported) { | |
3041 | ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION, | |
3042 | cbss->information_elements, | |
3043 | cbss->len_information_elements); | |
3044 | if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) | |
3045 | ht_oper = (void *)(ht_oper_ie + 2); | |
3046 | } | |
3047 | ||
3048 | if (ht_oper) { | |
3049 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, | |
3050 | cbss->channel->band); | |
3051 | /* check that channel matches the right operating channel */ | |
3052 | if (cbss->channel->center_freq != ht_cfreq) { | |
3053 | /* | |
3054 | * It's possible that some APs are confused here; | |
3055 | * Netgear WNDR3700 sometimes reports 4 higher than | |
3056 | * the actual channel in association responses, but | |
3057 | * since we look at probe response/beacon data here | |
3058 | * it should be OK. | |
3059 | */ | |
bdcbd8e0 JB |
3060 | sdata_info(sdata, |
3061 | "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", | |
3062 | cbss->channel->center_freq, | |
3063 | ht_cfreq, ht_oper->primary_chan, | |
3064 | cbss->channel->band); | |
24398e39 JB |
3065 | ht_oper = NULL; |
3066 | } | |
3067 | } | |
3068 | ||
3069 | if (ht_oper) { | |
3070 | channel_type = NL80211_CHAN_HT20; | |
3071 | ||
3072 | if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { | |
3073 | switch (ht_oper->ht_param & | |
3074 | IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
3075 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
3076 | channel_type = NL80211_CHAN_HT40PLUS; | |
3077 | break; | |
3078 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
3079 | channel_type = NL80211_CHAN_HT40MINUS; | |
3080 | break; | |
3081 | } | |
3082 | } | |
3083 | } | |
3084 | ||
3085 | if (!ieee80211_set_channel_type(local, sdata, channel_type)) { | |
3086 | /* can only fail due to HT40+/- mismatch */ | |
3087 | channel_type = NL80211_CHAN_HT20; | |
bdcbd8e0 JB |
3088 | sdata_info(sdata, |
3089 | "disabling 40 MHz due to multi-vif mismatch\n"); | |
24398e39 JB |
3090 | ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ; |
3091 | WARN_ON(!ieee80211_set_channel_type(local, sdata, | |
3092 | channel_type)); | |
3093 | } | |
3094 | ||
5d6a1b06 | 3095 | local->oper_channel = cbss->channel; |
6aee4ca3 | 3096 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
a1cf775d | 3097 | |
6df653c7 | 3098 | if (sta) { |
5d6a1b06 JB |
3099 | u32 rates = 0, basic_rates = 0; |
3100 | bool have_higher_than_11mbit; | |
3101 | int min_rate = INT_MAX, min_rate_index = -1; | |
3102 | ||
5d6a1b06 JB |
3103 | ieee80211_get_rates(sband, bss->supp_rates, |
3104 | bss->supp_rates_len, | |
3105 | &rates, &basic_rates, | |
3106 | &have_higher_than_11mbit, | |
3107 | &min_rate, &min_rate_index); | |
3108 | ||
3109 | /* | |
3110 | * This used to be a workaround for basic rates missing | |
3111 | * in the association response frame. Now that we no | |
3112 | * longer use the basic rates from there, it probably | |
3113 | * doesn't happen any more, but keep the workaround so | |
3114 | * in case some *other* APs are buggy in different ways | |
3115 | * we can connect -- with a warning. | |
3116 | */ | |
3117 | if (!basic_rates && min_rate_index >= 0) { | |
bdcbd8e0 JB |
3118 | sdata_info(sdata, |
3119 | "No basic rates, using min rate instead\n"); | |
5d6a1b06 JB |
3120 | basic_rates = BIT(min_rate_index); |
3121 | } | |
3122 | ||
3123 | sta->sta.supp_rates[cbss->channel->band] = rates; | |
3124 | sdata->vif.bss_conf.basic_rates = basic_rates; | |
3125 | ||
3126 | /* cf. IEEE 802.11 9.2.12 */ | |
3127 | if (local->oper_channel->band == IEEE80211_BAND_2GHZ && | |
3128 | have_higher_than_11mbit) | |
3129 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
3130 | else | |
3131 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
3132 | ||
3133 | memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); | |
3134 | ||
8c358bcd JB |
3135 | /* set timing information */ |
3136 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; | |
3137 | sdata->vif.bss_conf.sync_tsf = cbss->tsf; | |
3138 | sdata->vif.bss_conf.sync_device_ts = bss->device_ts; | |
3139 | ||
3140 | /* tell driver about BSSID, basic rates and timing */ | |
5d6a1b06 | 3141 | ieee80211_bss_info_change_notify(sdata, |
8c358bcd JB |
3142 | BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | |
3143 | BSS_CHANGED_BEACON_INT); | |
a1cf775d JB |
3144 | |
3145 | if (assoc) | |
3146 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); | |
3147 | ||
3148 | err = sta_info_insert(sta); | |
3149 | sta = NULL; | |
3150 | if (err) { | |
bdcbd8e0 JB |
3151 | sdata_info(sdata, |
3152 | "failed to insert STA entry for the AP (error %d)\n", | |
3153 | err); | |
a1cf775d JB |
3154 | return err; |
3155 | } | |
3156 | } else | |
b203ca39 | 3157 | WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); |
a1cf775d JB |
3158 | |
3159 | return 0; | |
3160 | } | |
3161 | ||
77fdaa12 JB |
3162 | /* config hooks */ |
3163 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, | |
3164 | struct cfg80211_auth_request *req) | |
9c6bd790 | 3165 | { |
66e67e41 JB |
3166 | struct ieee80211_local *local = sdata->local; |
3167 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3168 | struct ieee80211_mgd_auth_data *auth_data; | |
77fdaa12 | 3169 | u16 auth_alg; |
66e67e41 JB |
3170 | int err; |
3171 | ||
3172 | /* prepare auth data structure */ | |
9c6bd790 | 3173 | |
77fdaa12 JB |
3174 | switch (req->auth_type) { |
3175 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
3176 | auth_alg = WLAN_AUTH_OPEN; | |
3177 | break; | |
3178 | case NL80211_AUTHTYPE_SHARED_KEY: | |
66e67e41 | 3179 | if (IS_ERR(local->wep_tx_tfm)) |
9dca9c49 | 3180 | return -EOPNOTSUPP; |
77fdaa12 JB |
3181 | auth_alg = WLAN_AUTH_SHARED_KEY; |
3182 | break; | |
3183 | case NL80211_AUTHTYPE_FT: | |
3184 | auth_alg = WLAN_AUTH_FT; | |
3185 | break; | |
3186 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
3187 | auth_alg = WLAN_AUTH_LEAP; | |
3188 | break; | |
3189 | default: | |
3190 | return -EOPNOTSUPP; | |
60f8b39c | 3191 | } |
77fdaa12 | 3192 | |
66e67e41 JB |
3193 | auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL); |
3194 | if (!auth_data) | |
9c6bd790 | 3195 | return -ENOMEM; |
77fdaa12 | 3196 | |
66e67e41 | 3197 | auth_data->bss = req->bss; |
77fdaa12 JB |
3198 | |
3199 | if (req->ie && req->ie_len) { | |
66e67e41 JB |
3200 | memcpy(auth_data->ie, req->ie, req->ie_len); |
3201 | auth_data->ie_len = req->ie_len; | |
9c6bd790 | 3202 | } |
77fdaa12 | 3203 | |
fffd0934 | 3204 | if (req->key && req->key_len) { |
66e67e41 JB |
3205 | auth_data->key_len = req->key_len; |
3206 | auth_data->key_idx = req->key_idx; | |
3207 | memcpy(auth_data->key, req->key, req->key_len); | |
fffd0934 JB |
3208 | } |
3209 | ||
66e67e41 | 3210 | auth_data->algorithm = auth_alg; |
60f8b39c | 3211 | |
66e67e41 | 3212 | /* try to authenticate/probe */ |
2a33bee2 | 3213 | |
66e67e41 | 3214 | mutex_lock(&ifmgd->mtx); |
2a33bee2 | 3215 | |
66e67e41 JB |
3216 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || |
3217 | ifmgd->assoc_data) { | |
3218 | err = -EBUSY; | |
3219 | goto err_free; | |
2a33bee2 GE |
3220 | } |
3221 | ||
66e67e41 JB |
3222 | if (ifmgd->auth_data) |
3223 | ieee80211_destroy_auth_data(sdata, false); | |
2a33bee2 | 3224 | |
66e67e41 JB |
3225 | /* prep auth_data so we don't go into idle on disassoc */ |
3226 | ifmgd->auth_data = auth_data; | |
af6b6374 | 3227 | |
66e67e41 | 3228 | if (ifmgd->associated) |
37ad3888 | 3229 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
af6b6374 | 3230 | |
bdcbd8e0 | 3231 | sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); |
e5b900d2 | 3232 | |
a1cf775d JB |
3233 | err = ieee80211_prep_connection(sdata, req->bss, false); |
3234 | if (err) | |
66e67e41 | 3235 | goto err_clear; |
af6b6374 | 3236 | |
66e67e41 JB |
3237 | err = ieee80211_probe_auth(sdata); |
3238 | if (err) { | |
66e67e41 JB |
3239 | sta_info_destroy_addr(sdata, req->bss->bssid); |
3240 | goto err_clear; | |
3241 | } | |
3242 | ||
3243 | /* hold our own reference */ | |
3244 | cfg80211_ref_bss(auth_data->bss); | |
3245 | err = 0; | |
3246 | goto out_unlock; | |
3247 | ||
3248 | err_clear: | |
3249 | ifmgd->auth_data = NULL; | |
3250 | err_free: | |
3251 | kfree(auth_data); | |
3252 | out_unlock: | |
3253 | mutex_unlock(&ifmgd->mtx); | |
b2abb6e2 | 3254 | |
66e67e41 | 3255 | return err; |
af6b6374 JB |
3256 | } |
3257 | ||
77fdaa12 JB |
3258 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
3259 | struct cfg80211_assoc_request *req) | |
f0706e82 | 3260 | { |
66e67e41 | 3261 | struct ieee80211_local *local = sdata->local; |
77fdaa12 | 3262 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 3263 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
66e67e41 | 3264 | struct ieee80211_mgd_assoc_data *assoc_data; |
4e74bfdb | 3265 | struct ieee80211_supported_band *sband; |
9dde6423 | 3266 | const u8 *ssidie, *ht_ie; |
2a33bee2 | 3267 | int i, err; |
f0706e82 | 3268 | |
66e67e41 JB |
3269 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
3270 | if (!ssidie) | |
3271 | return -EINVAL; | |
3272 | ||
3273 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); | |
3274 | if (!assoc_data) | |
3275 | return -ENOMEM; | |
3276 | ||
77fdaa12 | 3277 | mutex_lock(&ifmgd->mtx); |
9c87ba67 | 3278 | |
66e67e41 | 3279 | if (ifmgd->associated) |
37ad3888 | 3280 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
66e67e41 JB |
3281 | |
3282 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { | |
3283 | err = -EBUSY; | |
3284 | goto err_free; | |
af6b6374 | 3285 | } |
77fdaa12 | 3286 | |
66e67e41 JB |
3287 | if (ifmgd->assoc_data) { |
3288 | err = -EBUSY; | |
3289 | goto err_free; | |
3290 | } | |
77fdaa12 | 3291 | |
66e67e41 JB |
3292 | if (ifmgd->auth_data) { |
3293 | bool match; | |
3294 | ||
3295 | /* keep sta info, bssid if matching */ | |
b203ca39 | 3296 | match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
66e67e41 | 3297 | ieee80211_destroy_auth_data(sdata, match); |
2a33bee2 GE |
3298 | } |
3299 | ||
66e67e41 JB |
3300 | /* prepare assoc data */ |
3301 | ||
77fdaa12 | 3302 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
375177bf | 3303 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
77fdaa12 | 3304 | |
d8ec4433 JO |
3305 | ifmgd->beacon_crc_valid = false; |
3306 | ||
de5036aa JB |
3307 | /* |
3308 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
3309 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
3310 | * ciphers is configured as pairwise. | |
3311 | * We can set this to true for non-11n hardware, that'll be checked | |
3312 | * separately along with the peer capabilities. | |
3313 | */ | |
1c4cb928 | 3314 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { |
77fdaa12 JB |
3315 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
3316 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
1c4cb928 | 3317 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { |
77fdaa12 | 3318 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
1c4cb928 JB |
3319 | netdev_info(sdata->dev, |
3320 | "disabling HT due to WEP/TKIP use\n"); | |
3321 | } | |
3322 | } | |
77fdaa12 | 3323 | |
ef96a842 BG |
3324 | if (req->flags & ASSOC_REQ_DISABLE_HT) |
3325 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
3326 | ||
4e74bfdb JB |
3327 | /* Also disable HT if we don't support it or the AP doesn't use WMM */ |
3328 | sband = local->hw.wiphy->bands[req->bss->channel->band]; | |
3329 | if (!sband->ht_cap.ht_supported || | |
1c4cb928 | 3330 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) { |
4e74bfdb | 3331 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
1c4cb928 JB |
3332 | netdev_info(sdata->dev, |
3333 | "disabling HT as WMM/QoS is not supported\n"); | |
3334 | } | |
4e74bfdb | 3335 | |
ef96a842 BG |
3336 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
3337 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, | |
3338 | sizeof(ifmgd->ht_capa_mask)); | |
3339 | ||
77fdaa12 | 3340 | if (req->ie && req->ie_len) { |
66e67e41 JB |
3341 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
3342 | assoc_data->ie_len = req->ie_len; | |
3343 | } | |
f679f65d | 3344 | |
66e67e41 | 3345 | assoc_data->bss = req->bss; |
f679f65d | 3346 | |
af6b6374 JB |
3347 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
3348 | if (ifmgd->powersave) | |
3349 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
3350 | else | |
3351 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
3352 | } else | |
3353 | ifmgd->ap_smps = ifmgd->req_smps; | |
3354 | ||
66e67e41 | 3355 | assoc_data->capability = req->bss->capability; |
32c5057b JB |
3356 | assoc_data->wmm = bss->wmm_used && |
3357 | (local->hw.queues >= IEEE80211_NUM_ACS); | |
66e67e41 JB |
3358 | assoc_data->supp_rates = bss->supp_rates; |
3359 | assoc_data->supp_rates_len = bss->supp_rates_len; | |
9dde6423 JB |
3360 | |
3361 | ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); | |
3362 | if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) | |
3363 | assoc_data->ap_ht_param = | |
3364 | ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; | |
3365 | else | |
3366 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
63f170e0 | 3367 | |
ab13315a KV |
3368 | if (bss->wmm_used && bss->uapsd_supported && |
3369 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
76f0303d | 3370 | assoc_data->uapsd = true; |
ab13315a KV |
3371 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
3372 | } else { | |
76f0303d | 3373 | assoc_data->uapsd = false; |
ab13315a KV |
3374 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
3375 | } | |
3376 | ||
66e67e41 JB |
3377 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); |
3378 | assoc_data->ssid_len = ssidie[1]; | |
63f170e0 | 3379 | |
77fdaa12 | 3380 | if (req->prev_bssid) |
66e67e41 | 3381 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 JB |
3382 | |
3383 | if (req->use_mfp) { | |
3384 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
3385 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
3386 | } else { | |
3387 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
3388 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
3389 | } | |
3390 | ||
3391 | if (req->crypto.control_port) | |
3392 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
3393 | else | |
3394 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
3395 | ||
a621fa4d JB |
3396 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
3397 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; | |
3398 | ||
66e67e41 JB |
3399 | /* kick off associate process */ |
3400 | ||
3401 | ifmgd->assoc_data = assoc_data; | |
3402 | ||
a1cf775d JB |
3403 | err = ieee80211_prep_connection(sdata, req->bss, true); |
3404 | if (err) | |
3405 | goto err_clear; | |
66e67e41 JB |
3406 | |
3407 | if (!bss->dtim_period && | |
3408 | sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) { | |
3409 | /* | |
3410 | * Wait up to one beacon interval ... | |
3411 | * should this be more if we miss one? | |
3412 | */ | |
bdcbd8e0 JB |
3413 | sdata_info(sdata, "waiting for beacon from %pM\n", |
3414 | ifmgd->bssid); | |
3f9768a5 | 3415 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); |
66e67e41 JB |
3416 | } else { |
3417 | assoc_data->have_beacon = true; | |
3418 | assoc_data->sent_assoc = false; | |
3419 | assoc_data->timeout = jiffies; | |
3420 | } | |
3421 | run_again(ifmgd, assoc_data->timeout); | |
3422 | ||
fcff4f10 PS |
3423 | if (bss->corrupt_data) { |
3424 | char *corrupt_type = "data"; | |
3425 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { | |
3426 | if (bss->corrupt_data & | |
3427 | IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
3428 | corrupt_type = "beacon and probe response"; | |
3429 | else | |
3430 | corrupt_type = "beacon"; | |
3431 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
3432 | corrupt_type = "probe response"; | |
bdcbd8e0 JB |
3433 | sdata_info(sdata, "associating with AP with corrupt %s\n", |
3434 | corrupt_type); | |
fcff4f10 PS |
3435 | } |
3436 | ||
66e67e41 JB |
3437 | err = 0; |
3438 | goto out; | |
3439 | err_clear: | |
3440 | ifmgd->assoc_data = NULL; | |
3441 | err_free: | |
3442 | kfree(assoc_data); | |
3443 | out: | |
3444 | mutex_unlock(&ifmgd->mtx); | |
3445 | ||
3446 | return err; | |
f0706e82 JB |
3447 | } |
3448 | ||
77fdaa12 | 3449 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 3450 | struct cfg80211_deauth_request *req) |
f0706e82 | 3451 | { |
46900298 | 3452 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
5fef7dbc | 3453 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
f0706e82 | 3454 | |
77fdaa12 JB |
3455 | mutex_lock(&ifmgd->mtx); |
3456 | ||
37ad3888 | 3457 | if (ifmgd->auth_data) { |
66e67e41 | 3458 | ieee80211_destroy_auth_data(sdata, false); |
a58ce43f | 3459 | mutex_unlock(&ifmgd->mtx); |
66e67e41 | 3460 | return 0; |
af6b6374 | 3461 | } |
77fdaa12 | 3462 | |
bdcbd8e0 JB |
3463 | sdata_info(sdata, |
3464 | "deauthenticating from %pM by local choice (reason=%d)\n", | |
3465 | req->bssid, req->reason_code); | |
0ff71613 | 3466 | |
37ad3888 | 3467 | if (ifmgd->associated && |
b203ca39 | 3468 | ether_addr_equal(ifmgd->associated->bssid, req->bssid)) |
37ad3888 | 3469 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
5fef7dbc | 3470 | req->reason_code, true, frame_buf); |
37ad3888 JB |
3471 | else |
3472 | ieee80211_send_deauth_disassoc(sdata, req->bssid, | |
3473 | IEEE80211_STYPE_DEAUTH, | |
3474 | req->reason_code, true, | |
3475 | frame_buf); | |
3476 | mutex_unlock(&ifmgd->mtx); | |
3477 | ||
5fef7dbc | 3478 | __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
f0706e82 | 3479 | |
7da7cc1d | 3480 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3481 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3482 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3483 | |
f0706e82 JB |
3484 | return 0; |
3485 | } | |
84363e6e | 3486 | |
77fdaa12 | 3487 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 3488 | struct cfg80211_disassoc_request *req) |
9c6bd790 | 3489 | { |
77fdaa12 | 3490 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
e69e95db | 3491 | u8 bssid[ETH_ALEN]; |
5fef7dbc | 3492 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
9c6bd790 | 3493 | |
77fdaa12 | 3494 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 3495 | |
8d8b261a JB |
3496 | /* |
3497 | * cfg80211 should catch this ... but it's racy since | |
3498 | * we can receive a disassoc frame, process it, hand it | |
3499 | * to cfg80211 while that's in a locked section already | |
3500 | * trying to tell us that the user wants to disconnect. | |
3501 | */ | |
0c1ad2ca | 3502 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
3503 | mutex_unlock(&ifmgd->mtx); |
3504 | return -ENOLINK; | |
3505 | } | |
3506 | ||
bdcbd8e0 JB |
3507 | sdata_info(sdata, |
3508 | "disassociating from %pM by local choice (reason=%d)\n", | |
3509 | req->bss->bssid, req->reason_code); | |
0ff71613 | 3510 | |
e69e95db | 3511 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
37ad3888 JB |
3512 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, |
3513 | req->reason_code, !req->local_state_change, | |
3514 | frame_buf); | |
77fdaa12 | 3515 | mutex_unlock(&ifmgd->mtx); |
10f644a4 | 3516 | |
5fef7dbc | 3517 | __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
bc83b681 | 3518 | |
7da7cc1d | 3519 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3520 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3521 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3522 | |
10f644a4 JB |
3523 | return 0; |
3524 | } | |
026331c4 | 3525 | |
afa762f6 | 3526 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) |
54e4ffb2 JB |
3527 | { |
3528 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3529 | ||
3530 | mutex_lock(&ifmgd->mtx); | |
3531 | if (ifmgd->assoc_data) | |
3532 | ieee80211_destroy_assoc_data(sdata, false); | |
3533 | if (ifmgd->auth_data) | |
3534 | ieee80211_destroy_auth_data(sdata, false); | |
3535 | del_timer_sync(&ifmgd->timer); | |
3536 | mutex_unlock(&ifmgd->mtx); | |
3537 | } | |
3538 | ||
a97c13c3 JO |
3539 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
3540 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
3541 | gfp_t gfp) | |
3542 | { | |
3543 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3544 | ||
b5878a2d JB |
3545 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
3546 | ||
a97c13c3 JO |
3547 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
3548 | } | |
3549 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |