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, | |
074d46d1 | 261 | struct sk_buff *skb, const u8 *ht_oper_ie, |
66e67e41 JB |
262 | struct ieee80211_supported_band *sband, |
263 | struct ieee80211_channel *channel, | |
264 | enum ieee80211_smps_mode smps) | |
265 | { | |
074d46d1 | 266 | struct ieee80211_ht_operation *ht_oper; |
66e67e41 JB |
267 | u8 *pos; |
268 | u32 flags = channel->flags; | |
269 | u16 cap; | |
270 | struct ieee80211_sta_ht_cap ht_cap; | |
271 | ||
272 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); | |
273 | ||
074d46d1 | 274 | if (!ht_oper_ie) |
66e67e41 JB |
275 | return; |
276 | ||
074d46d1 | 277 | if (ht_oper_ie[1] < sizeof(struct ieee80211_ht_operation)) |
66e67e41 JB |
278 | return; |
279 | ||
280 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
281 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
282 | ||
074d46d1 | 283 | ht_oper = (struct ieee80211_ht_operation *)(ht_oper_ie + 2); |
66e67e41 JB |
284 | |
285 | /* determine capability flags */ | |
286 | cap = ht_cap.cap; | |
287 | ||
074d46d1 | 288 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
66e67e41 JB |
289 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
290 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
291 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
292 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
293 | } | |
294 | break; | |
295 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
296 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
297 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
298 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
299 | } | |
300 | break; | |
301 | } | |
302 | ||
24398e39 JB |
303 | /* |
304 | * If 40 MHz was disabled associate as though we weren't | |
305 | * capable of 40 MHz -- some broken APs will never fall | |
306 | * back to trying to transmit in 20 MHz. | |
307 | */ | |
308 | if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { | |
309 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
310 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
311 | } | |
312 | ||
66e67e41 JB |
313 | /* set SM PS mode properly */ |
314 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
315 | switch (smps) { | |
316 | case IEEE80211_SMPS_AUTOMATIC: | |
317 | case IEEE80211_SMPS_NUM_MODES: | |
318 | WARN_ON(1); | |
319 | case IEEE80211_SMPS_OFF: | |
320 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
321 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
322 | break; | |
323 | case IEEE80211_SMPS_STATIC: | |
324 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
325 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
326 | break; | |
327 | case IEEE80211_SMPS_DYNAMIC: | |
328 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
329 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
330 | break; | |
331 | } | |
332 | ||
333 | /* reserve and fill IE */ | |
334 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
335 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); | |
336 | } | |
337 | ||
338 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
339 | { | |
340 | struct ieee80211_local *local = sdata->local; | |
341 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
342 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
343 | struct sk_buff *skb; | |
344 | struct ieee80211_mgmt *mgmt; | |
345 | u8 *pos, qos_info; | |
346 | size_t offset = 0, noffset; | |
347 | int i, count, rates_len, supp_rates_len; | |
348 | u16 capab; | |
349 | struct ieee80211_supported_band *sband; | |
350 | u32 rates = 0; | |
66e67e41 JB |
351 | |
352 | lockdep_assert_held(&ifmgd->mtx); | |
353 | ||
354 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
355 | ||
356 | if (assoc_data->supp_rates_len) { | |
357 | /* | |
358 | * Get all rates supported by the device and the AP as | |
359 | * some APs don't like getting a superset of their rates | |
360 | * in the association request (e.g. D-Link DAP 1353 in | |
361 | * b-only mode)... | |
362 | */ | |
363 | rates_len = ieee80211_compatible_rates(assoc_data->supp_rates, | |
364 | assoc_data->supp_rates_len, | |
365 | sband, &rates); | |
366 | } else { | |
367 | /* | |
368 | * In case AP not provide any supported rates information | |
369 | * before association, we send information element(s) with | |
370 | * all rates that we support. | |
371 | */ | |
372 | rates = ~0; | |
373 | rates_len = sband->n_bitrates; | |
374 | } | |
375 | ||
376 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
377 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
378 | 2 + assoc_data->ssid_len + /* SSID */ | |
379 | 4 + rates_len + /* (extended) rates */ | |
380 | 4 + /* power capability */ | |
381 | 2 + 2 * sband->n_channels + /* supported channels */ | |
382 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
383 | assoc_data->ie_len + /* extra IEs */ | |
384 | 9, /* WMM */ | |
385 | GFP_KERNEL); | |
386 | if (!skb) | |
387 | return; | |
388 | ||
389 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
390 | ||
391 | capab = WLAN_CAPABILITY_ESS; | |
392 | ||
393 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
394 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
395 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
396 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
397 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
398 | } | |
399 | ||
400 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) | |
401 | capab |= WLAN_CAPABILITY_PRIVACY; | |
402 | ||
403 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
404 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
405 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
406 | ||
407 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
408 | memset(mgmt, 0, 24); | |
409 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); | |
410 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
411 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); | |
412 | ||
413 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { | |
414 | skb_put(skb, 10); | |
415 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
416 | IEEE80211_STYPE_REASSOC_REQ); | |
417 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
418 | mgmt->u.reassoc_req.listen_interval = | |
419 | cpu_to_le16(local->hw.conf.listen_interval); | |
420 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, | |
421 | ETH_ALEN); | |
422 | } else { | |
423 | skb_put(skb, 4); | |
424 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
425 | IEEE80211_STYPE_ASSOC_REQ); | |
426 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
427 | mgmt->u.assoc_req.listen_interval = | |
428 | cpu_to_le16(local->hw.conf.listen_interval); | |
429 | } | |
430 | ||
431 | /* SSID */ | |
432 | pos = skb_put(skb, 2 + assoc_data->ssid_len); | |
433 | *pos++ = WLAN_EID_SSID; | |
434 | *pos++ = assoc_data->ssid_len; | |
435 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); | |
436 | ||
437 | /* add all rates which were marked to be used above */ | |
438 | supp_rates_len = rates_len; | |
439 | if (supp_rates_len > 8) | |
440 | supp_rates_len = 8; | |
441 | ||
442 | pos = skb_put(skb, supp_rates_len + 2); | |
443 | *pos++ = WLAN_EID_SUPP_RATES; | |
444 | *pos++ = supp_rates_len; | |
445 | ||
446 | count = 0; | |
447 | for (i = 0; i < sband->n_bitrates; i++) { | |
448 | if (BIT(i) & rates) { | |
449 | int rate = sband->bitrates[i].bitrate; | |
450 | *pos++ = (u8) (rate / 5); | |
451 | if (++count == 8) | |
452 | break; | |
453 | } | |
454 | } | |
455 | ||
456 | if (rates_len > count) { | |
457 | pos = skb_put(skb, rates_len - count + 2); | |
458 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
459 | *pos++ = rates_len - count; | |
460 | ||
461 | for (i++; i < sband->n_bitrates; i++) { | |
462 | if (BIT(i) & rates) { | |
463 | int rate = sband->bitrates[i].bitrate; | |
464 | *pos++ = (u8) (rate / 5); | |
465 | } | |
466 | } | |
467 | } | |
468 | ||
469 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
470 | /* 1. power capabilities */ | |
471 | pos = skb_put(skb, 4); | |
472 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
473 | *pos++ = 2; | |
474 | *pos++ = 0; /* min tx power */ | |
475 | *pos++ = local->oper_channel->max_power; /* max tx power */ | |
476 | ||
477 | /* 2. supported channels */ | |
478 | /* TODO: get this in reg domain format */ | |
479 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
480 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
481 | *pos++ = 2 * sband->n_channels; | |
482 | for (i = 0; i < sband->n_channels; i++) { | |
483 | *pos++ = ieee80211_frequency_to_channel( | |
484 | sband->channels[i].center_freq); | |
485 | *pos++ = 1; /* one channel in the subband*/ | |
486 | } | |
487 | } | |
488 | ||
489 | /* if present, add any custom IEs that go before HT */ | |
490 | if (assoc_data->ie_len && assoc_data->ie) { | |
491 | static const u8 before_ht[] = { | |
492 | WLAN_EID_SSID, | |
493 | WLAN_EID_SUPP_RATES, | |
494 | WLAN_EID_EXT_SUPP_RATES, | |
495 | WLAN_EID_PWR_CAPABILITY, | |
496 | WLAN_EID_SUPPORTED_CHANNELS, | |
497 | WLAN_EID_RSN, | |
498 | WLAN_EID_QOS_CAPA, | |
499 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
500 | WLAN_EID_MOBILITY_DOMAIN, | |
501 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
502 | }; | |
503 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, | |
504 | before_ht, ARRAY_SIZE(before_ht), | |
505 | offset); | |
506 | pos = skb_put(skb, noffset - offset); | |
507 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
508 | offset = noffset; | |
509 | } | |
510 | ||
4e74bfdb | 511 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
074d46d1 | 512 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_operation_ie, |
66e67e41 JB |
513 | sband, local->oper_channel, ifmgd->ap_smps); |
514 | ||
515 | /* if present, add any custom non-vendor IEs that go after HT */ | |
516 | if (assoc_data->ie_len && assoc_data->ie) { | |
517 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, | |
518 | assoc_data->ie_len, | |
519 | offset); | |
520 | pos = skb_put(skb, noffset - offset); | |
521 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
522 | offset = noffset; | |
523 | } | |
524 | ||
76f0303d JB |
525 | if (assoc_data->wmm) { |
526 | if (assoc_data->uapsd) { | |
dc41e4d4 EP |
527 | qos_info = ifmgd->uapsd_queues; |
528 | qos_info |= (ifmgd->uapsd_max_sp_len << | |
66e67e41 JB |
529 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); |
530 | } else { | |
531 | qos_info = 0; | |
532 | } | |
533 | ||
534 | pos = skb_put(skb, 9); | |
535 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
536 | *pos++ = 7; /* len */ | |
537 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
538 | *pos++ = 0x50; | |
539 | *pos++ = 0xf2; | |
540 | *pos++ = 2; /* WME */ | |
541 | *pos++ = 0; /* WME info */ | |
542 | *pos++ = 1; /* WME ver */ | |
543 | *pos++ = qos_info; | |
544 | } | |
545 | ||
546 | /* add any remaining custom (i.e. vendor specific here) IEs */ | |
547 | if (assoc_data->ie_len && assoc_data->ie) { | |
548 | noffset = assoc_data->ie_len; | |
549 | pos = skb_put(skb, noffset - offset); | |
550 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
551 | } | |
552 | ||
553 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
554 | ieee80211_tx_skb(sdata, skb); | |
555 | } | |
556 | ||
ef422bc0 | 557 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 558 | const u8 *bssid, u16 stype, |
5fef7dbc JB |
559 | u16 reason, bool send_frame, |
560 | u8 *frame_buf) | |
9ac19a90 JB |
561 | { |
562 | struct ieee80211_local *local = sdata->local; | |
46900298 | 563 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 | 564 | struct sk_buff *skb; |
5fef7dbc | 565 | struct ieee80211_mgmt *mgmt = (void *)frame_buf; |
d15b8459 | 566 | |
5fef7dbc JB |
567 | /* build frame */ |
568 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); | |
569 | mgmt->duration = 0; /* initialize only */ | |
570 | mgmt->seq_ctrl = 0; /* initialize only */ | |
77fdaa12 | 571 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 572 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 573 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 574 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
575 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
576 | ||
5fef7dbc JB |
577 | if (send_frame) { |
578 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
579 | DEAUTH_DISASSOC_LEN); | |
580 | if (!skb) | |
581 | return; | |
d5cdfacb | 582 | |
5fef7dbc JB |
583 | skb_reserve(skb, local->hw.extra_tx_headroom); |
584 | ||
585 | /* copy in frame */ | |
586 | memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN), | |
587 | mgmt, DEAUTH_DISASSOC_LEN); | |
588 | ||
589 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) | |
590 | IEEE80211_SKB_CB(skb)->flags |= | |
591 | IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
d5cdfacb | 592 | ieee80211_tx_skb(sdata, skb); |
5fef7dbc | 593 | } |
9ac19a90 JB |
594 | } |
595 | ||
572e0012 KV |
596 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
597 | struct ieee80211_sub_if_data *sdata) | |
598 | { | |
572e0012 KV |
599 | struct ieee80211_pspoll *pspoll; |
600 | struct sk_buff *skb; | |
572e0012 | 601 | |
d8cd189e KV |
602 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
603 | if (!skb) | |
572e0012 | 604 | return; |
572e0012 | 605 | |
d8cd189e KV |
606 | pspoll = (struct ieee80211_pspoll *) skb->data; |
607 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 608 | |
62ae67be JB |
609 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
610 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
611 | } |
612 | ||
965bedad JB |
613 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
614 | struct ieee80211_sub_if_data *sdata, | |
615 | int powersave) | |
616 | { | |
617 | struct sk_buff *skb; | |
d8cd189e | 618 | struct ieee80211_hdr_3addr *nullfunc; |
b6f35301 | 619 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad | 620 | |
d8cd189e KV |
621 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
622 | if (!skb) | |
965bedad | 623 | return; |
965bedad | 624 | |
d8cd189e | 625 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 626 | if (powersave) |
d8cd189e | 627 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 628 | |
62ae67be | 629 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
b6f35301 RM |
630 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
631 | IEEE80211_STA_CONNECTION_POLL)) | |
632 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; | |
633 | ||
62ae67be | 634 | ieee80211_tx_skb(sdata, skb); |
965bedad JB |
635 | } |
636 | ||
d524215f FF |
637 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
638 | struct ieee80211_sub_if_data *sdata) | |
639 | { | |
640 | struct sk_buff *skb; | |
641 | struct ieee80211_hdr *nullfunc; | |
642 | __le16 fc; | |
643 | ||
644 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
645 | return; | |
646 | ||
647 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
d15b8459 | 648 | if (!skb) |
d524215f | 649 | return; |
d15b8459 | 650 | |
d524215f FF |
651 | skb_reserve(skb, local->hw.extra_tx_headroom); |
652 | ||
653 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
654 | memset(nullfunc, 0, 30); | |
655 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
656 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
657 | nullfunc->frame_control = fc; | |
658 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
659 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
660 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
661 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
662 | ||
663 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
664 | ieee80211_tx_skb(sdata, skb); | |
665 | } | |
666 | ||
cc32abd4 JB |
667 | /* spectrum management related things */ |
668 | static void ieee80211_chswitch_work(struct work_struct *work) | |
669 | { | |
670 | struct ieee80211_sub_if_data *sdata = | |
671 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
672 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
673 | ||
9607e6b6 | 674 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
675 | return; |
676 | ||
77fdaa12 JB |
677 | mutex_lock(&ifmgd->mtx); |
678 | if (!ifmgd->associated) | |
679 | goto out; | |
cc32abd4 JB |
680 | |
681 | sdata->local->oper_channel = sdata->local->csa_channel; | |
5ce6e438 JB |
682 | if (!sdata->local->ops->channel_switch) { |
683 | /* call "hw_config" only if doing sw channel switch */ | |
684 | ieee80211_hw_config(sdata->local, | |
685 | IEEE80211_CONF_CHANGE_CHANNEL); | |
1ea57b1f SL |
686 | } else { |
687 | /* update the device channel directly */ | |
688 | sdata->local->hw.conf.channel = sdata->local->oper_channel; | |
5ce6e438 | 689 | } |
77fdaa12 | 690 | |
cc32abd4 | 691 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 692 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 693 | |
cc32abd4 JB |
694 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
695 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
696 | out: |
697 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
698 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
699 | } |
700 | ||
5ce6e438 JB |
701 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
702 | { | |
703 | struct ieee80211_sub_if_data *sdata; | |
704 | struct ieee80211_if_managed *ifmgd; | |
705 | ||
706 | sdata = vif_to_sdata(vif); | |
707 | ifmgd = &sdata->u.mgd; | |
708 | ||
709 | trace_api_chswitch_done(sdata, success); | |
710 | if (!success) { | |
711 | /* | |
712 | * If the channel switch was not successful, stay | |
713 | * around on the old channel. We currently lack | |
714 | * good handling of this situation, possibly we | |
715 | * should just drop the association. | |
716 | */ | |
717 | sdata->local->csa_channel = sdata->local->oper_channel; | |
718 | } | |
719 | ||
720 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
721 | } | |
722 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
723 | ||
cc32abd4 JB |
724 | static void ieee80211_chswitch_timer(unsigned long data) |
725 | { | |
726 | struct ieee80211_sub_if_data *sdata = | |
727 | (struct ieee80211_sub_if_data *) data; | |
728 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
729 | ||
5bb644a0 JB |
730 | if (sdata->local->quiescing) { |
731 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
732 | return; | |
733 | } | |
734 | ||
42935eca | 735 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
736 | } |
737 | ||
738 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
739 | struct ieee80211_channel_sw_ie *sw_elem, | |
5ce6e438 JB |
740 | struct ieee80211_bss *bss, |
741 | u64 timestamp) | |
cc32abd4 | 742 | { |
0c1ad2ca JB |
743 | struct cfg80211_bss *cbss = |
744 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
745 | struct ieee80211_channel *new_ch; |
746 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
59eb21a6 BR |
747 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, |
748 | cbss->channel->band); | |
cc32abd4 | 749 | |
77fdaa12 JB |
750 | ASSERT_MGD_MTX(ifmgd); |
751 | ||
752 | if (!ifmgd->associated) | |
cc32abd4 JB |
753 | return; |
754 | ||
fbe9c429 | 755 | if (sdata->local->scanning) |
cc32abd4 JB |
756 | return; |
757 | ||
758 | /* Disregard subsequent beacons if we are already running a timer | |
759 | processing a CSA */ | |
760 | ||
761 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
762 | return; | |
763 | ||
764 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
765 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
766 | return; | |
767 | ||
768 | sdata->local->csa_channel = new_ch; | |
769 | ||
5ce6e438 JB |
770 | if (sdata->local->ops->channel_switch) { |
771 | /* use driver's channel switch callback */ | |
772 | struct ieee80211_channel_switch ch_switch; | |
773 | memset(&ch_switch, 0, sizeof(ch_switch)); | |
774 | ch_switch.timestamp = timestamp; | |
775 | if (sw_elem->mode) { | |
776 | ch_switch.block_tx = true; | |
777 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
778 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
779 | } | |
780 | ch_switch.channel = new_ch; | |
781 | ch_switch.count = sw_elem->count; | |
782 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
783 | drv_channel_switch(sdata->local, &ch_switch); | |
784 | return; | |
785 | } | |
786 | ||
787 | /* channel switch handled in software */ | |
cc32abd4 | 788 | if (sw_elem->count <= 1) { |
42935eca | 789 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 | 790 | } else { |
9feaddc7 WYG |
791 | if (sw_elem->mode) |
792 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
cc32abd4 JB |
793 | IEEE80211_QUEUE_STOP_REASON_CSA); |
794 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
795 | mod_timer(&ifmgd->chswitch_timer, | |
796 | jiffies + | |
797 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 798 | cbss->beacon_interval)); |
cc32abd4 JB |
799 | } |
800 | } | |
801 | ||
802 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
803 | u16 capab_info, u8 *pwr_constr_elem, | |
804 | u8 pwr_constr_elem_len) | |
805 | { | |
806 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
807 | ||
808 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
809 | return; | |
810 | ||
811 | /* Power constraint IE length should be 1 octet */ | |
812 | if (pwr_constr_elem_len != 1) | |
813 | return; | |
814 | ||
a48b13ac | 815 | if ((*pwr_constr_elem <= conf->channel->max_reg_power) && |
cc32abd4 JB |
816 | (*pwr_constr_elem != sdata->local->power_constr_level)) { |
817 | sdata->local->power_constr_level = *pwr_constr_elem; | |
818 | ieee80211_hw_config(sdata->local, 0); | |
819 | } | |
820 | } | |
821 | ||
f90754c1 JO |
822 | void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif) |
823 | { | |
824 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
825 | struct ieee80211_local *local = sdata->local; | |
826 | struct ieee80211_conf *conf = &local->hw.conf; | |
827 | ||
828 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
829 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
830 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
831 | ||
832 | local->disable_dynamic_ps = false; | |
833 | conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout; | |
834 | } | |
835 | EXPORT_SYMBOL(ieee80211_enable_dyn_ps); | |
836 | ||
837 | void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif) | |
838 | { | |
839 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
840 | struct ieee80211_local *local = sdata->local; | |
841 | struct ieee80211_conf *conf = &local->hw.conf; | |
842 | ||
843 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
844 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
845 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
846 | ||
847 | local->disable_dynamic_ps = true; | |
848 | conf->dynamic_ps_timeout = 0; | |
849 | del_timer_sync(&local->dynamic_ps_timer); | |
850 | ieee80211_queue_work(&local->hw, | |
851 | &local->dynamic_ps_enable_work); | |
852 | } | |
853 | EXPORT_SYMBOL(ieee80211_disable_dyn_ps); | |
854 | ||
965bedad JB |
855 | /* powersave */ |
856 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
857 | struct ieee80211_sub_if_data *sdata) | |
858 | { | |
859 | struct ieee80211_conf *conf = &local->hw.conf; | |
860 | ||
d5edaedc JB |
861 | /* |
862 | * If we are scanning right now then the parameters will | |
863 | * take effect when scan finishes. | |
864 | */ | |
fbe9c429 | 865 | if (local->scanning) |
d5edaedc JB |
866 | return; |
867 | ||
965bedad JB |
868 | if (conf->dynamic_ps_timeout > 0 && |
869 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
870 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
871 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
872 | } else { | |
873 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
874 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf | 875 | |
2a13052f JO |
876 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
877 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
878 | return; | |
879 | ||
880 | conf->flags |= IEEE80211_CONF_PS; | |
881 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
965bedad JB |
882 | } |
883 | } | |
884 | ||
885 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
886 | { | |
887 | struct ieee80211_conf *conf = &local->hw.conf; | |
888 | ||
889 | if (local->ps_sdata) { | |
965bedad JB |
890 | ieee80211_enable_ps(local, local->ps_sdata); |
891 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
892 | conf->flags &= ~IEEE80211_CONF_PS; | |
893 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
894 | del_timer_sync(&local->dynamic_ps_timer); | |
895 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
896 | } | |
897 | } | |
898 | ||
808118cb JY |
899 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
900 | { | |
901 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; | |
902 | struct sta_info *sta = NULL; | |
c2c98fde | 903 | bool authorized = false; |
808118cb JY |
904 | |
905 | if (!mgd->powersave) | |
906 | return false; | |
907 | ||
05cb9108 JB |
908 | if (mgd->broken_ap) |
909 | return false; | |
910 | ||
808118cb JY |
911 | if (!mgd->associated) |
912 | return false; | |
913 | ||
914 | if (!mgd->associated->beacon_ies) | |
915 | return false; | |
916 | ||
917 | if (mgd->flags & (IEEE80211_STA_BEACON_POLL | | |
918 | IEEE80211_STA_CONNECTION_POLL)) | |
919 | return false; | |
920 | ||
921 | rcu_read_lock(); | |
922 | sta = sta_info_get(sdata, mgd->bssid); | |
923 | if (sta) | |
c2c98fde | 924 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
808118cb JY |
925 | rcu_read_unlock(); |
926 | ||
c2c98fde | 927 | return authorized; |
808118cb JY |
928 | } |
929 | ||
965bedad | 930 | /* need to hold RTNL or interface lock */ |
10f644a4 | 931 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
932 | { |
933 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
934 | int count = 0; | |
195e294d | 935 | int timeout; |
965bedad JB |
936 | |
937 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
938 | local->ps_sdata = NULL; | |
939 | return; | |
940 | } | |
941 | ||
af6b6374 JB |
942 | if (!list_empty(&local->work_list)) { |
943 | local->ps_sdata = NULL; | |
944 | goto change; | |
945 | } | |
946 | ||
965bedad | 947 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 948 | if (!ieee80211_sdata_running(sdata)) |
965bedad | 949 | continue; |
8c7914de RM |
950 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
951 | /* If an AP vif is found, then disable PS | |
952 | * by setting the count to zero thereby setting | |
953 | * ps_sdata to NULL. | |
954 | */ | |
955 | count = 0; | |
956 | break; | |
957 | } | |
965bedad JB |
958 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
959 | continue; | |
960 | found = sdata; | |
961 | count++; | |
962 | } | |
963 | ||
808118cb | 964 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
f90754c1 | 965 | struct ieee80211_conf *conf = &local->hw.conf; |
10f644a4 JB |
966 | s32 beaconint_us; |
967 | ||
968 | if (latency < 0) | |
ed77134b | 969 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
10f644a4 JB |
970 | |
971 | beaconint_us = ieee80211_tu_to_usec( | |
972 | found->vif.bss_conf.beacon_int); | |
973 | ||
ff616381 | 974 | timeout = local->dynamic_ps_forced_timeout; |
195e294d JO |
975 | if (timeout < 0) { |
976 | /* | |
ff616381 JO |
977 | * Go to full PSM if the user configures a very low |
978 | * latency requirement. | |
0ab82b04 EP |
979 | * The 2000 second value is there for compatibility |
980 | * until the PM_QOS_NETWORK_LATENCY is configured | |
981 | * with real values. | |
195e294d | 982 | */ |
0ab82b04 EP |
983 | if (latency > (1900 * USEC_PER_MSEC) && |
984 | latency != (2000 * USEC_PER_SEC)) | |
195e294d | 985 | timeout = 0; |
ff616381 JO |
986 | else |
987 | timeout = 100; | |
195e294d | 988 | } |
f90754c1 JO |
989 | local->dynamic_ps_user_timeout = timeout; |
990 | if (!local->disable_dynamic_ps) | |
991 | conf->dynamic_ps_timeout = | |
992 | local->dynamic_ps_user_timeout; | |
195e294d | 993 | |
04fe2037 | 994 | if (beaconint_us > latency) { |
10f644a4 | 995 | local->ps_sdata = NULL; |
04fe2037 | 996 | } else { |
56007a02 | 997 | struct ieee80211_bss *bss; |
04fe2037 | 998 | int maxslp = 1; |
56007a02 | 999 | u8 dtimper; |
04fe2037 | 1000 | |
56007a02 JB |
1001 | bss = (void *)found->u.mgd.associated->priv; |
1002 | dtimper = bss->dtim_period; | |
1003 | ||
1004 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
1005 | if (!dtimper) | |
1006 | dtimper = 1; | |
1007 | else if (dtimper > 1) | |
04fe2037 JB |
1008 | maxslp = min_t(int, dtimper, |
1009 | latency / beaconint_us); | |
1010 | ||
9ccebe61 | 1011 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 1012 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 1013 | local->ps_sdata = found; |
04fe2037 | 1014 | } |
10f644a4 | 1015 | } else { |
965bedad | 1016 | local->ps_sdata = NULL; |
10f644a4 | 1017 | } |
965bedad | 1018 | |
af6b6374 | 1019 | change: |
965bedad JB |
1020 | ieee80211_change_ps(local); |
1021 | } | |
1022 | ||
1023 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
1024 | { | |
1025 | struct ieee80211_local *local = | |
1026 | container_of(work, struct ieee80211_local, | |
1027 | dynamic_ps_disable_work); | |
1028 | ||
1029 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1030 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1031 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1032 | } | |
1033 | ||
1034 | ieee80211_wake_queues_by_reason(&local->hw, | |
1035 | IEEE80211_QUEUE_STOP_REASON_PS); | |
1036 | } | |
1037 | ||
1038 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1039 | { | |
1040 | struct ieee80211_local *local = | |
1041 | container_of(work, struct ieee80211_local, | |
1042 | dynamic_ps_enable_work); | |
1043 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
5e34069c | 1044 | struct ieee80211_if_managed *ifmgd; |
1ddc2867 RM |
1045 | unsigned long flags; |
1046 | int q; | |
965bedad JB |
1047 | |
1048 | /* can only happen when PS was just disabled anyway */ | |
1049 | if (!sdata) | |
1050 | return; | |
1051 | ||
5e34069c CL |
1052 | ifmgd = &sdata->u.mgd; |
1053 | ||
965bedad JB |
1054 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
1055 | return; | |
1056 | ||
77b7023a AN |
1057 | if (!local->disable_dynamic_ps && |
1058 | local->hw.conf.dynamic_ps_timeout > 0) { | |
1059 | /* don't enter PS if TX frames are pending */ | |
1060 | if (drv_tx_frames_pending(local)) { | |
1ddc2867 RM |
1061 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1062 | msecs_to_jiffies( | |
1063 | local->hw.conf.dynamic_ps_timeout)); | |
1064 | return; | |
1065 | } | |
77b7023a AN |
1066 | |
1067 | /* | |
1068 | * transmission can be stopped by others which leads to | |
1069 | * dynamic_ps_timer expiry. Postpone the ps timer if it | |
1070 | * is not the actual idle state. | |
1071 | */ | |
1072 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1073 | for (q = 0; q < local->hw.queues; q++) { | |
1074 | if (local->queue_stop_reasons[q]) { | |
1075 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1076 | flags); | |
1077 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1078 | msecs_to_jiffies( | |
1079 | local->hw.conf.dynamic_ps_timeout)); | |
1080 | return; | |
1081 | } | |
1082 | } | |
1083 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1ddc2867 | 1084 | } |
1ddc2867 | 1085 | |
375177bf | 1086 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
9c38a8b4 | 1087 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
f3e85b9e | 1088 | netif_tx_stop_all_queues(sdata->dev); |
965bedad | 1089 | |
e8306f98 VN |
1090 | if (drv_tx_frames_pending(local)) |
1091 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1092 | msecs_to_jiffies( | |
1093 | local->hw.conf.dynamic_ps_timeout)); | |
1094 | else { | |
1095 | ieee80211_send_nullfunc(local, sdata, 1); | |
1096 | /* Flush to get the tx status of nullfunc frame */ | |
1097 | drv_flush(local, false); | |
1098 | } | |
f3e85b9e VN |
1099 | } |
1100 | ||
2a13052f JO |
1101 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
1102 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
375177bf VN |
1103 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1104 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
1105 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
1106 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1107 | } | |
f3e85b9e | 1108 | |
77b7023a AN |
1109 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1110 | netif_tx_wake_all_queues(sdata->dev); | |
965bedad JB |
1111 | } |
1112 | ||
1113 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
1114 | { | |
1115 | struct ieee80211_local *local = (void *) data; | |
1116 | ||
78f1a8b7 | 1117 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
1118 | return; |
1119 | ||
42935eca | 1120 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
1121 | } |
1122 | ||
60f8b39c | 1123 | /* MLME */ |
f698d856 | 1124 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
4ced3f74 | 1125 | struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1126 | u8 *wmm_param, size_t wmm_param_len) |
1127 | { | |
f0706e82 | 1128 | struct ieee80211_tx_queue_params params; |
4ced3f74 | 1129 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1130 | size_t left; |
1131 | int count; | |
ab13315a | 1132 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 1133 | |
e1b3ec1a SG |
1134 | if (!local->ops->conf_tx) |
1135 | return; | |
1136 | ||
32c5057b | 1137 | if (local->hw.queues < IEEE80211_NUM_ACS) |
3434fbd3 JB |
1138 | return; |
1139 | ||
1140 | if (!wmm_param) | |
1141 | return; | |
1142 | ||
f0706e82 JB |
1143 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
1144 | return; | |
ab13315a KV |
1145 | |
1146 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
dc41e4d4 | 1147 | uapsd_queues = ifmgd->uapsd_queues; |
ab13315a | 1148 | |
f0706e82 | 1149 | count = wmm_param[6] & 0x0f; |
46900298 | 1150 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 1151 | return; |
46900298 | 1152 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
1153 | |
1154 | pos = wmm_param + 8; | |
1155 | left = wmm_param_len - 8; | |
1156 | ||
1157 | memset(¶ms, 0, sizeof(params)); | |
1158 | ||
f0706e82 JB |
1159 | local->wmm_acm = 0; |
1160 | for (; left >= 4; left -= 4, pos += 4) { | |
1161 | int aci = (pos[0] >> 5) & 0x03; | |
1162 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 1163 | bool uapsd = false; |
f0706e82 JB |
1164 | int queue; |
1165 | ||
1166 | switch (aci) { | |
0eeb59fe | 1167 | case 1: /* AC_BK */ |
e100bb64 | 1168 | queue = 3; |
988c0f72 | 1169 | if (acm) |
0eeb59fe | 1170 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
1171 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
1172 | uapsd = true; | |
f0706e82 | 1173 | break; |
0eeb59fe | 1174 | case 2: /* AC_VI */ |
e100bb64 | 1175 | queue = 1; |
988c0f72 | 1176 | if (acm) |
0eeb59fe | 1177 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
1178 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
1179 | uapsd = true; | |
f0706e82 | 1180 | break; |
0eeb59fe | 1181 | case 3: /* AC_VO */ |
e100bb64 | 1182 | queue = 0; |
988c0f72 | 1183 | if (acm) |
0eeb59fe | 1184 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
1185 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
1186 | uapsd = true; | |
f0706e82 | 1187 | break; |
0eeb59fe | 1188 | case 0: /* AC_BE */ |
f0706e82 | 1189 | default: |
e100bb64 | 1190 | queue = 2; |
988c0f72 | 1191 | if (acm) |
0eeb59fe | 1192 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
1193 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
1194 | uapsd = true; | |
f0706e82 JB |
1195 | break; |
1196 | } | |
1197 | ||
1198 | params.aifs = pos[0] & 0x0f; | |
1199 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
1200 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 1201 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
1202 | params.uapsd = uapsd; |
1203 | ||
f4ea83dd | 1204 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec JP |
1205 | wiphy_debug(local->hw.wiphy, |
1206 | "WMM queue=%d aci=%d acm=%d aifs=%d " | |
1207 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", | |
1208 | queue, aci, acm, | |
1209 | params.aifs, params.cw_min, params.cw_max, | |
1210 | params.txop, params.uapsd); | |
3330d7be | 1211 | #endif |
f6f3def3 EP |
1212 | sdata->tx_conf[queue] = params; |
1213 | if (drv_conf_tx(local, sdata, queue, ¶ms)) | |
0fb9a9ec JP |
1214 | wiphy_debug(local->hw.wiphy, |
1215 | "failed to set TX queue parameters for queue %d\n", | |
1216 | queue); | |
f0706e82 | 1217 | } |
e1b3ec1a SG |
1218 | |
1219 | /* enable WMM or activate new settings */ | |
4ced3f74 | 1220 | sdata->vif.bss_conf.qos = true; |
f0706e82 JB |
1221 | } |
1222 | ||
7a5158ef JB |
1223 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
1224 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 1225 | { |
bda3933a | 1226 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 1227 | u32 changed = 0; |
7a5158ef JB |
1228 | bool use_protection; |
1229 | bool use_short_preamble; | |
1230 | bool use_short_slot; | |
1231 | ||
1232 | if (erp_valid) { | |
1233 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
1234 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
1235 | } else { | |
1236 | use_protection = false; | |
1237 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
1238 | } | |
1239 | ||
1240 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
1241 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
1242 | use_short_slot = true; | |
5628221c | 1243 | |
471b3efd | 1244 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
1245 | bss_conf->use_cts_prot = use_protection; |
1246 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 1247 | } |
7e9ed188 | 1248 | |
d43c7b37 | 1249 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 1250 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 1251 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 1252 | } |
d9430a32 | 1253 | |
7a5158ef | 1254 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
1255 | bss_conf->use_short_slot = use_short_slot; |
1256 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
1257 | } |
1258 | ||
1259 | return changed; | |
1260 | } | |
1261 | ||
f698d856 | 1262 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 1263 | struct cfg80211_bss *cbss, |
ae5eb026 | 1264 | u32 bss_info_changed) |
f0706e82 | 1265 | { |
0c1ad2ca | 1266 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 1267 | struct ieee80211_local *local = sdata->local; |
68542962 | 1268 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
d6f2da5b | 1269 | |
ae5eb026 | 1270 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 1271 | /* set timing information */ |
68542962 | 1272 | bss_conf->beacon_int = cbss->beacon_interval; |
e9ac0745 | 1273 | bss_conf->last_tsf = cbss->tsf; |
5628221c | 1274 | |
77fdaa12 JB |
1275 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
1276 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 1277 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 1278 | |
7ccc8bd7 FF |
1279 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
1280 | IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); | |
1281 | ||
0c1ad2ca JB |
1282 | sdata->u.mgd.associated = cbss; |
1283 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 1284 | |
17e4ec14 JM |
1285 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
1286 | ||
b291ba11 JB |
1287 | /* just to be sure */ |
1288 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1289 | IEEE80211_STA_BEACON_POLL); | |
1290 | ||
9ac19a90 | 1291 | ieee80211_led_assoc(local, 1); |
9306102e | 1292 | |
e5b900d2 JB |
1293 | if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) |
1294 | bss_conf->dtim_period = bss->dtim_period; | |
1295 | else | |
1296 | bss_conf->dtim_period = 0; | |
1297 | ||
68542962 | 1298 | bss_conf->assoc = 1; |
9cef8737 | 1299 | |
a97c13c3 | 1300 | /* Tell the driver to monitor connection quality (if supported) */ |
ea086359 | 1301 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
68542962 | 1302 | bss_conf->cqm_rssi_thold) |
a97c13c3 JO |
1303 | bss_info_changed |= BSS_CHANGED_CQM; |
1304 | ||
68542962 JO |
1305 | /* Enable ARP filtering */ |
1306 | if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) { | |
1307 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; | |
1308 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; | |
1309 | } | |
1310 | ||
ae5eb026 | 1311 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 1312 | |
056508dc JB |
1313 | mutex_lock(&local->iflist_mtx); |
1314 | ieee80211_recalc_ps(local, -1); | |
025e6be2 | 1315 | ieee80211_recalc_smps(local); |
056508dc | 1316 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 1317 | |
8a5b33f5 | 1318 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 1319 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
1320 | } |
1321 | ||
e69e95db | 1322 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
37ad3888 JB |
1323 | u16 stype, u16 reason, bool tx, |
1324 | u8 *frame_buf) | |
aa458d17 | 1325 | { |
46900298 | 1326 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
1327 | struct ieee80211_local *local = sdata->local; |
1328 | struct sta_info *sta; | |
3cc5240b | 1329 | u32 changed = 0; |
b291ba11 | 1330 | u8 bssid[ETH_ALEN]; |
aa458d17 | 1331 | |
77fdaa12 JB |
1332 | ASSERT_MGD_MTX(ifmgd); |
1333 | ||
37ad3888 JB |
1334 | if (WARN_ON_ONCE(tx && !frame_buf)) |
1335 | return; | |
1336 | ||
b291ba11 JB |
1337 | if (WARN_ON(!ifmgd->associated)) |
1338 | return; | |
1339 | ||
0c1ad2ca | 1340 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 1341 | |
77fdaa12 JB |
1342 | ifmgd->associated = NULL; |
1343 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1344 | ||
1345 | /* | |
1346 | * we need to commit the associated = NULL change because the | |
1347 | * scan code uses that to determine whether this iface should | |
1348 | * go to/wake up from powersave or not -- and could otherwise | |
1349 | * wake the queues erroneously. | |
1350 | */ | |
1351 | smp_mb(); | |
1352 | ||
1353 | /* | |
1354 | * Thus, we can only afterwards stop the queues -- to account | |
1355 | * for the case where another CPU is finishing a scan at this | |
1356 | * time -- we don't want the scan code to enable queues. | |
1357 | */ | |
aa458d17 | 1358 | |
8a5b33f5 | 1359 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1360 | netif_carrier_off(sdata->dev); |
1361 | ||
2a419056 | 1362 | mutex_lock(&local->sta_mtx); |
abe60632 | 1363 | sta = sta_info_get(sdata, bssid); |
4cad6c7c | 1364 | if (sta) { |
c2c98fde | 1365 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 1366 | ieee80211_sta_tear_down_BA_sessions(sta, tx); |
4cad6c7c | 1367 | } |
2a419056 | 1368 | mutex_unlock(&local->sta_mtx); |
aa458d17 | 1369 | |
37ad3888 JB |
1370 | /* deauthenticate/disassociate now */ |
1371 | if (tx || frame_buf) | |
1372 | ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason, | |
1373 | tx, frame_buf); | |
1374 | ||
1375 | /* flush out frame */ | |
1376 | if (tx) | |
1377 | drv_flush(local, false); | |
1378 | ||
1379 | /* remove AP and TDLS peers */ | |
1380 | sta_info_flush(local, sdata); | |
1381 | ||
1382 | /* finally reset all BSS / config parameters */ | |
f5e5bf25 TW |
1383 | changed |= ieee80211_reset_erp_info(sdata); |
1384 | ||
f5e5bf25 | 1385 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1386 | changed |= BSS_CHANGED_ASSOC; |
1387 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1388 | |
413ad50a | 1389 | /* on the next assoc, re-program HT parameters */ |
ef96a842 BG |
1390 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
1391 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); | |
413ad50a | 1392 | |
a8302de9 VT |
1393 | local->power_constr_level = 0; |
1394 | ||
520eb820 KV |
1395 | del_timer_sync(&local->dynamic_ps_timer); |
1396 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1397 | ||
e0cb686f KV |
1398 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1399 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
3cc5240b | 1400 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
e0cb686f | 1401 | } |
a331400b | 1402 | local->ps_sdata = NULL; |
ae5eb026 | 1403 | |
68542962 JO |
1404 | /* Disable ARP filtering */ |
1405 | if (sdata->vif.bss_conf.arp_filter_enabled) { | |
1406 | sdata->vif.bss_conf.arp_filter_enabled = false; | |
1407 | changed |= BSS_CHANGED_ARP_FILTER; | |
1408 | } | |
1409 | ||
3abead59 JB |
1410 | sdata->vif.bss_conf.qos = false; |
1411 | changed |= BSS_CHANGED_QOS; | |
1412 | ||
0aaffa9b JB |
1413 | /* The BSSID (not really interesting) and HT changed */ |
1414 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
ae5eb026 | 1415 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 1416 | |
3cc5240b JB |
1417 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
1418 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); | |
1419 | ieee80211_hw_config(local, 0); | |
1420 | ||
3abead59 JB |
1421 | /* disassociated - set to defaults now */ |
1422 | ieee80211_set_wmm_default(sdata, false); | |
1423 | ||
b9dcf712 JB |
1424 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); |
1425 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
1426 | del_timer_sync(&sdata->u.mgd.timer); | |
1427 | del_timer_sync(&sdata->u.mgd.chswitch_timer); | |
aa458d17 | 1428 | } |
f0706e82 | 1429 | |
3cf335d5 KV |
1430 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1431 | struct ieee80211_hdr *hdr) | |
1432 | { | |
1433 | /* | |
1434 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1435 | * from AP because we know that the connection is working both ways | |
1436 | * at that time. But multicast frames (and hence also beacons) must | |
1437 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
1438 | * data idle periods for sending the periodic probe request to the |
1439 | * AP we're connected to. | |
3cf335d5 | 1440 | */ |
b291ba11 JB |
1441 | if (is_multicast_ether_addr(hdr->addr1)) |
1442 | return; | |
1443 | ||
be099e82 | 1444 | ieee80211_sta_reset_conn_monitor(sdata); |
3cf335d5 | 1445 | } |
f0706e82 | 1446 | |
4e5ff376 FF |
1447 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
1448 | { | |
1449 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
133d40f9 | 1450 | struct ieee80211_local *local = sdata->local; |
4e5ff376 | 1451 | |
133d40f9 | 1452 | mutex_lock(&local->mtx); |
4e5ff376 | 1453 | if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
133d40f9 SG |
1454 | IEEE80211_STA_CONNECTION_POLL))) { |
1455 | mutex_unlock(&local->mtx); | |
1456 | return; | |
1457 | } | |
4e5ff376 FF |
1458 | |
1459 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1460 | IEEE80211_STA_BEACON_POLL); | |
133d40f9 SG |
1461 | |
1462 | mutex_lock(&local->iflist_mtx); | |
1463 | ieee80211_recalc_ps(local, -1); | |
1464 | mutex_unlock(&local->iflist_mtx); | |
4e5ff376 FF |
1465 | |
1466 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
133d40f9 | 1467 | goto out; |
4e5ff376 FF |
1468 | |
1469 | /* | |
1470 | * We've received a probe response, but are not sure whether | |
1471 | * we have or will be receiving any beacons or data, so let's | |
1472 | * schedule the timers again, just in case. | |
1473 | */ | |
1474 | ieee80211_sta_reset_beacon_monitor(sdata); | |
1475 | ||
1476 | mod_timer(&ifmgd->conn_mon_timer, | |
1477 | round_jiffies_up(jiffies + | |
1478 | IEEE80211_CONNECTION_IDLE_TIME)); | |
133d40f9 SG |
1479 | out: |
1480 | ieee80211_run_deferred_scan(local); | |
1481 | mutex_unlock(&local->mtx); | |
4e5ff376 FF |
1482 | } |
1483 | ||
1484 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, | |
04ac3c0e | 1485 | struct ieee80211_hdr *hdr, bool ack) |
4e5ff376 | 1486 | { |
75706d0e | 1487 | if (!ieee80211_is_data(hdr->frame_control)) |
4e5ff376 FF |
1488 | return; |
1489 | ||
04ac3c0e FF |
1490 | if (ack) |
1491 | ieee80211_sta_reset_conn_monitor(sdata); | |
4e5ff376 FF |
1492 | |
1493 | if (ieee80211_is_nullfunc(hdr->frame_control) && | |
1494 | sdata->u.mgd.probe_send_count > 0) { | |
04ac3c0e FF |
1495 | if (ack) |
1496 | sdata->u.mgd.probe_send_count = 0; | |
1497 | else | |
1498 | sdata->u.mgd.nullfunc_failed = true; | |
4e5ff376 FF |
1499 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
1500 | } | |
1501 | } | |
1502 | ||
a43abf29 ML |
1503 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1504 | { | |
1505 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1506 | const u8 *ssid; | |
f01a067d | 1507 | u8 *dst = ifmgd->associated->bssid; |
180205bd | 1508 | u8 unicast_limit = max(1, max_probe_tries - 3); |
f01a067d LR |
1509 | |
1510 | /* | |
1511 | * Try sending broadcast probe requests for the last three | |
1512 | * probe requests after the first ones failed since some | |
1513 | * buggy APs only support broadcast probe requests. | |
1514 | */ | |
1515 | if (ifmgd->probe_send_count >= unicast_limit) | |
1516 | dst = NULL; | |
a43abf29 | 1517 | |
4e5ff376 FF |
1518 | /* |
1519 | * When the hardware reports an accurate Tx ACK status, it's | |
1520 | * better to send a nullfunc frame instead of a probe request, | |
1521 | * as it will kick us off the AP quickly if we aren't associated | |
1522 | * anymore. The timeout will be reset if the frame is ACKed by | |
1523 | * the AP. | |
1524 | */ | |
992e68bf SD |
1525 | ifmgd->probe_send_count++; |
1526 | ||
04ac3c0e FF |
1527 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
1528 | ifmgd->nullfunc_failed = false; | |
4e5ff376 | 1529 | ieee80211_send_nullfunc(sdata->local, sdata, 0); |
04ac3c0e | 1530 | } else { |
88c868c4 SG |
1531 | int ssid_len; |
1532 | ||
4e5ff376 | 1533 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
88c868c4 SG |
1534 | if (WARN_ON_ONCE(ssid == NULL)) |
1535 | ssid_len = 0; | |
1536 | else | |
1537 | ssid_len = ssid[1]; | |
1538 | ||
1539 | ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL, | |
1540 | 0, (u32) -1, true, false); | |
4e5ff376 | 1541 | } |
a43abf29 | 1542 | |
180205bd | 1543 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
a43abf29 | 1544 | run_again(ifmgd, ifmgd->probe_timeout); |
f69b9c79 RM |
1545 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
1546 | drv_flush(sdata->local, false); | |
a43abf29 ML |
1547 | } |
1548 | ||
b291ba11 JB |
1549 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1550 | bool beacon) | |
04de8381 | 1551 | { |
04de8381 | 1552 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 1553 | bool already = false; |
34bfc411 | 1554 | |
9607e6b6 | 1555 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
1556 | return; |
1557 | ||
77fdaa12 JB |
1558 | mutex_lock(&ifmgd->mtx); |
1559 | ||
1560 | if (!ifmgd->associated) | |
1561 | goto out; | |
1562 | ||
133d40f9 SG |
1563 | mutex_lock(&sdata->local->mtx); |
1564 | ||
1565 | if (sdata->local->tmp_channel || sdata->local->scanning) { | |
1566 | mutex_unlock(&sdata->local->mtx); | |
1567 | goto out; | |
1568 | } | |
1569 | ||
a860402d | 1570 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
e87cc472 JP |
1571 | if (beacon) |
1572 | net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n", | |
1573 | sdata->name); | |
a860402d | 1574 | #endif |
04de8381 | 1575 | |
b291ba11 JB |
1576 | /* |
1577 | * The driver/our work has already reported this event or the | |
1578 | * connection monitoring has kicked in and we have already sent | |
1579 | * a probe request. Or maybe the AP died and the driver keeps | |
1580 | * reporting until we disassociate... | |
1581 | * | |
1582 | * In either case we have to ignore the current call to this | |
1583 | * function (except for setting the correct probe reason bit) | |
1584 | * because otherwise we would reset the timer every time and | |
1585 | * never check whether we received a probe response! | |
1586 | */ | |
1587 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1588 | IEEE80211_STA_CONNECTION_POLL)) | |
1589 | already = true; | |
1590 | ||
1591 | if (beacon) | |
1592 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
1593 | else | |
1594 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
1595 | ||
133d40f9 SG |
1596 | mutex_unlock(&sdata->local->mtx); |
1597 | ||
b291ba11 JB |
1598 | if (already) |
1599 | goto out; | |
1600 | ||
4e751843 JB |
1601 | mutex_lock(&sdata->local->iflist_mtx); |
1602 | ieee80211_recalc_ps(sdata->local, -1); | |
1603 | mutex_unlock(&sdata->local->iflist_mtx); | |
1604 | ||
a43abf29 ML |
1605 | ifmgd->probe_send_count = 0; |
1606 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
1607 | out: |
1608 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
1609 | } |
1610 | ||
a619a4c0 JO |
1611 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
1612 | struct ieee80211_vif *vif) | |
1613 | { | |
1614 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1615 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1616 | struct sk_buff *skb; | |
1617 | const u8 *ssid; | |
88c868c4 | 1618 | int ssid_len; |
a619a4c0 JO |
1619 | |
1620 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1621 | return NULL; | |
1622 | ||
1623 | ASSERT_MGD_MTX(ifmgd); | |
1624 | ||
1625 | if (!ifmgd->associated) | |
1626 | return NULL; | |
1627 | ||
1628 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); | |
88c868c4 SG |
1629 | if (WARN_ON_ONCE(ssid == NULL)) |
1630 | ssid_len = 0; | |
1631 | else | |
1632 | ssid_len = ssid[1]; | |
1633 | ||
a619a4c0 | 1634 | skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid, |
88c868c4 | 1635 | (u32) -1, ssid + 2, ssid_len, |
85a237fe | 1636 | NULL, 0, true); |
a619a4c0 JO |
1637 | |
1638 | return skb; | |
1639 | } | |
1640 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); | |
1641 | ||
1e4dcd01 JO |
1642 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
1643 | { | |
1644 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1645 | struct ieee80211_local *local = sdata->local; | |
1646 | u8 bssid[ETH_ALEN]; | |
5fef7dbc | 1647 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
1e4dcd01 JO |
1648 | |
1649 | mutex_lock(&ifmgd->mtx); | |
1650 | if (!ifmgd->associated) { | |
1651 | mutex_unlock(&ifmgd->mtx); | |
1652 | return; | |
1653 | } | |
1654 | ||
1655 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
1656 | ||
180205bd BG |
1657 | printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n", |
1658 | sdata->name, bssid); | |
1e4dcd01 | 1659 | |
37ad3888 JB |
1660 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
1661 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
1662 | false, frame_buf); | |
1e4dcd01 | 1663 | mutex_unlock(&ifmgd->mtx); |
7da7cc1d | 1664 | |
1e4dcd01 JO |
1665 | /* |
1666 | * must be outside lock due to cfg80211, | |
1667 | * but that's not a problem. | |
1668 | */ | |
5fef7dbc | 1669 | cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
fcac4fb0 FF |
1670 | |
1671 | mutex_lock(&local->mtx); | |
1672 | ieee80211_recalc_idle(local); | |
1673 | mutex_unlock(&local->mtx); | |
1e4dcd01 JO |
1674 | } |
1675 | ||
1676 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
b291ba11 JB |
1677 | { |
1678 | struct ieee80211_sub_if_data *sdata = | |
1679 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 1680 | u.mgd.beacon_connection_loss_work); |
a85e1d55 PS |
1681 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1682 | struct sta_info *sta; | |
1683 | ||
1684 | if (ifmgd->associated) { | |
30fa9047 | 1685 | rcu_read_lock(); |
a85e1d55 PS |
1686 | sta = sta_info_get(sdata, ifmgd->bssid); |
1687 | if (sta) | |
1688 | sta->beacon_loss_count++; | |
30fa9047 | 1689 | rcu_read_unlock(); |
a85e1d55 | 1690 | } |
b291ba11 | 1691 | |
1e4dcd01 JO |
1692 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1693 | __ieee80211_connection_loss(sdata); | |
1694 | else | |
1695 | ieee80211_mgd_probe_ap(sdata, true); | |
b291ba11 JB |
1696 | } |
1697 | ||
04de8381 KV |
1698 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1699 | { | |
1700 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 1701 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1702 | |
b5878a2d JB |
1703 | trace_api_beacon_loss(sdata); |
1704 | ||
1e4dcd01 JO |
1705 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1706 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
04de8381 KV |
1707 | } |
1708 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1709 | ||
1e4dcd01 JO |
1710 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1711 | { | |
1712 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1713 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1714 | ||
b5878a2d JB |
1715 | trace_api_connection_loss(sdata); |
1716 | ||
1e4dcd01 JO |
1717 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); |
1718 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
1719 | } | |
1720 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1721 | ||
1722 | ||
66e67e41 JB |
1723 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
1724 | bool assoc) | |
1725 | { | |
1726 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1727 | ||
1728 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1729 | ||
66e67e41 JB |
1730 | if (!assoc) { |
1731 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); | |
1732 | ||
1733 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1734 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
1735 | } | |
1736 | ||
1737 | cfg80211_put_bss(auth_data->bss); | |
1738 | kfree(auth_data); | |
1739 | sdata->u.mgd.auth_data = NULL; | |
1740 | } | |
1741 | ||
1742 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
1743 | struct ieee80211_mgmt *mgmt, size_t len) | |
1744 | { | |
1745 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1746 | u8 *pos; | |
1747 | struct ieee802_11_elems elems; | |
1748 | ||
1749 | pos = mgmt->u.auth.variable; | |
1750 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1751 | if (!elems.challenge) | |
1752 | return; | |
1753 | auth_data->expected_transaction = 4; | |
1754 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, | |
1755 | elems.challenge - 2, elems.challenge_len + 2, | |
1756 | auth_data->bss->bssid, auth_data->bss->bssid, | |
1757 | auth_data->key, auth_data->key_len, | |
1758 | auth_data->key_idx); | |
1759 | } | |
1760 | ||
1761 | static enum rx_mgmt_action __must_check | |
1762 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1763 | struct ieee80211_mgmt *mgmt, size_t len) | |
1764 | { | |
1765 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1766 | u8 bssid[ETH_ALEN]; | |
1767 | u16 auth_alg, auth_transaction, status_code; | |
1768 | struct sta_info *sta; | |
1769 | ||
1770 | lockdep_assert_held(&ifmgd->mtx); | |
1771 | ||
1772 | if (len < 24 + 6) | |
1773 | return RX_MGMT_NONE; | |
1774 | ||
1775 | if (!ifmgd->auth_data || ifmgd->auth_data->done) | |
1776 | return RX_MGMT_NONE; | |
1777 | ||
1778 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
1779 | ||
b203ca39 | 1780 | if (!ether_addr_equal(bssid, mgmt->bssid)) |
66e67e41 JB |
1781 | return RX_MGMT_NONE; |
1782 | ||
1783 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1784 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1785 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1786 | ||
1787 | if (auth_alg != ifmgd->auth_data->algorithm || | |
1788 | auth_transaction != ifmgd->auth_data->expected_transaction) | |
1789 | return RX_MGMT_NONE; | |
1790 | ||
1791 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1792 | printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n", | |
1793 | sdata->name, mgmt->sa, status_code); | |
1794 | goto out; | |
1795 | } | |
1796 | ||
1797 | switch (ifmgd->auth_data->algorithm) { | |
1798 | case WLAN_AUTH_OPEN: | |
1799 | case WLAN_AUTH_LEAP: | |
1800 | case WLAN_AUTH_FT: | |
1801 | break; | |
1802 | case WLAN_AUTH_SHARED_KEY: | |
1803 | if (ifmgd->auth_data->expected_transaction != 4) { | |
1804 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1805 | /* need another frame */ | |
1806 | return RX_MGMT_NONE; | |
1807 | } | |
1808 | break; | |
1809 | default: | |
1810 | WARN_ONCE(1, "invalid auth alg %d", | |
1811 | ifmgd->auth_data->algorithm); | |
1812 | return RX_MGMT_NONE; | |
1813 | } | |
1814 | ||
1815 | printk(KERN_DEBUG "%s: authenticated\n", sdata->name); | |
1816 | out: | |
66e67e41 JB |
1817 | ifmgd->auth_data->done = true; |
1818 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; | |
1819 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
1820 | ||
1821 | /* move station state to auth */ | |
1822 | mutex_lock(&sdata->local->sta_mtx); | |
1823 | sta = sta_info_get(sdata, bssid); | |
1824 | if (!sta) { | |
1825 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); | |
1826 | goto out_err; | |
1827 | } | |
1828 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { | |
1829 | printk(KERN_DEBUG "%s: failed moving %pM to auth\n", | |
1830 | sdata->name, bssid); | |
1831 | goto out_err; | |
1832 | } | |
1833 | mutex_unlock(&sdata->local->sta_mtx); | |
1834 | ||
1835 | return RX_MGMT_CFG80211_RX_AUTH; | |
1836 | out_err: | |
1837 | mutex_unlock(&sdata->local->sta_mtx); | |
1838 | /* ignore frame -- wait for timeout */ | |
1839 | return RX_MGMT_NONE; | |
1840 | } | |
1841 | ||
1842 | ||
77fdaa12 JB |
1843 | static enum rx_mgmt_action __must_check |
1844 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 1845 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1846 | { |
46900298 | 1847 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 1848 | const u8 *bssid = NULL; |
f0706e82 JB |
1849 | u16 reason_code; |
1850 | ||
66e67e41 JB |
1851 | lockdep_assert_held(&ifmgd->mtx); |
1852 | ||
f4ea83dd | 1853 | if (len < 24 + 2) |
77fdaa12 | 1854 | return RX_MGMT_NONE; |
f0706e82 | 1855 | |
66e67e41 | 1856 | if (!ifmgd->associated || |
b203ca39 | 1857 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
66e67e41 | 1858 | return RX_MGMT_NONE; |
77fdaa12 | 1859 | |
0c1ad2ca | 1860 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
1861 | |
1862 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1863 | ||
77fdaa12 | 1864 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 1865 | sdata->name, bssid, reason_code); |
77fdaa12 | 1866 | |
37ad3888 JB |
1867 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
1868 | ||
7da7cc1d | 1869 | mutex_lock(&sdata->local->mtx); |
63f170e0 | 1870 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1871 | mutex_unlock(&sdata->local->mtx); |
f0706e82 | 1872 | |
77fdaa12 | 1873 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
1874 | } |
1875 | ||
1876 | ||
77fdaa12 JB |
1877 | static enum rx_mgmt_action __must_check |
1878 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1879 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1880 | { |
46900298 | 1881 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1882 | u16 reason_code; |
1883 | ||
66e67e41 | 1884 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 | 1885 | |
66e67e41 | 1886 | if (len < 24 + 2) |
77fdaa12 JB |
1887 | return RX_MGMT_NONE; |
1888 | ||
66e67e41 | 1889 | if (!ifmgd->associated || |
b203ca39 | 1890 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
77fdaa12 | 1891 | return RX_MGMT_NONE; |
f0706e82 JB |
1892 | |
1893 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1894 | ||
0ff71613 | 1895 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 1896 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 1897 | |
37ad3888 JB |
1898 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
1899 | ||
7da7cc1d | 1900 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 1901 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1902 | mutex_unlock(&sdata->local->mtx); |
37ad3888 | 1903 | |
77fdaa12 | 1904 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
1905 | } |
1906 | ||
c74d084f CL |
1907 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
1908 | u8 *supp_rates, unsigned int supp_rates_len, | |
1909 | u32 *rates, u32 *basic_rates, | |
1910 | bool *have_higher_than_11mbit, | |
1911 | int *min_rate, int *min_rate_index) | |
1912 | { | |
1913 | int i, j; | |
1914 | ||
1915 | for (i = 0; i < supp_rates_len; i++) { | |
1916 | int rate = (supp_rates[i] & 0x7f) * 5; | |
1917 | bool is_basic = !!(supp_rates[i] & 0x80); | |
1918 | ||
1919 | if (rate > 110) | |
1920 | *have_higher_than_11mbit = true; | |
1921 | ||
1922 | /* | |
1923 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 | |
1924 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. | |
1925 | * | |
1926 | * Note: Even through the membership selector and the basic | |
1927 | * rate flag share the same bit, they are not exactly | |
1928 | * the same. | |
1929 | */ | |
1930 | if (!!(supp_rates[i] & 0x80) && | |
1931 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1932 | continue; | |
1933 | ||
1934 | for (j = 0; j < sband->n_bitrates; j++) { | |
1935 | if (sband->bitrates[j].bitrate == rate) { | |
1936 | *rates |= BIT(j); | |
1937 | if (is_basic) | |
1938 | *basic_rates |= BIT(j); | |
1939 | if (rate < *min_rate) { | |
1940 | *min_rate = rate; | |
1941 | *min_rate_index = j; | |
1942 | } | |
1943 | break; | |
1944 | } | |
1945 | } | |
1946 | } | |
1947 | } | |
f0706e82 | 1948 | |
66e67e41 JB |
1949 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
1950 | bool assoc) | |
1951 | { | |
1952 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
1953 | ||
1954 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1955 | ||
66e67e41 JB |
1956 | if (!assoc) { |
1957 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); | |
1958 | ||
1959 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1960 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
1961 | } | |
1962 | ||
1963 | kfree(assoc_data); | |
1964 | sdata->u.mgd.assoc_data = NULL; | |
1965 | } | |
1966 | ||
1967 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, | |
1968 | struct cfg80211_bss *cbss, | |
af6b6374 | 1969 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1970 | { |
46900298 | 1971 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1972 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1973 | struct ieee80211_supported_band *sband; |
f0706e82 | 1974 | struct sta_info *sta; |
af6b6374 | 1975 | u8 *pos; |
af6b6374 | 1976 | u16 capab_info, aid; |
f0706e82 | 1977 | struct ieee802_11_elems elems; |
bda3933a | 1978 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1979 | u32 changed = 0; |
c74d084f | 1980 | int err; |
f0706e82 | 1981 | |
af6b6374 | 1982 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1983 | |
f0706e82 | 1984 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1985 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1986 | |
1dd84aa2 | 1987 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
05cb9108 JB |
1988 | printk(KERN_DEBUG |
1989 | "%s: invalid AID value 0x%x; bits 15:14 not set\n", | |
1990 | sdata->name, aid); | |
1dd84aa2 JB |
1991 | aid &= ~(BIT(15) | BIT(14)); |
1992 | ||
05cb9108 JB |
1993 | ifmgd->broken_ap = false; |
1994 | ||
1995 | if (aid == 0 || aid > IEEE80211_MAX_AID) { | |
1996 | printk(KERN_DEBUG | |
1997 | "%s: invalid AID value %d (out of range), turn off PS\n", | |
1998 | sdata->name, aid); | |
1999 | aid = 0; | |
2000 | ifmgd->broken_ap = true; | |
2001 | } | |
2002 | ||
af6b6374 JB |
2003 | pos = mgmt->u.assoc_resp.variable; |
2004 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2005 | ||
f0706e82 JB |
2006 | if (!elems.supp_rates) { |
2007 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 2008 | sdata->name); |
af6b6374 | 2009 | return false; |
f0706e82 JB |
2010 | } |
2011 | ||
46900298 | 2012 | ifmgd->aid = aid; |
f0706e82 | 2013 | |
2a33bee2 GE |
2014 | mutex_lock(&sdata->local->sta_mtx); |
2015 | /* | |
2016 | * station info was already allocated and inserted before | |
2017 | * the association and should be available to us | |
2018 | */ | |
7852e361 | 2019 | sta = sta_info_get(sdata, cbss->bssid); |
2a33bee2 GE |
2020 | if (WARN_ON(!sta)) { |
2021 | mutex_unlock(&sdata->local->sta_mtx); | |
af6b6374 | 2022 | return false; |
77fdaa12 | 2023 | } |
05e5e883 | 2024 | |
66e67e41 | 2025 | sband = local->hw.wiphy->bands[local->oper_channel->band]; |
f709fc69 | 2026 | |
ab1faead | 2027 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ef96a842 | 2028 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
d9fe60de | 2029 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 | 2030 | |
64f68e5d JB |
2031 | sta->supports_40mhz = |
2032 | sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
2033 | ||
4b7679a5 | 2034 | rate_control_rate_init(sta); |
f0706e82 | 2035 | |
46900298 | 2036 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
c2c98fde | 2037 | set_sta_flag(sta, WLAN_STA_MFP); |
5394af4d | 2038 | |
ddf4ac53 | 2039 | if (elems.wmm_param) |
c2c98fde | 2040 | set_sta_flag(sta, WLAN_STA_WME); |
ddf4ac53 | 2041 | |
c8987876 JB |
2042 | err = sta_info_move_state(sta, IEEE80211_STA_AUTH); |
2043 | if (!err) | |
2044 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); | |
2045 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
2046 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
2047 | if (err) { | |
2048 | printk(KERN_DEBUG | |
2049 | "%s: failed to move station %pM to desired state\n", | |
2050 | sdata->name, sta->sta.addr); | |
2051 | WARN_ON(__sta_info_destroy(sta)); | |
2052 | mutex_unlock(&sdata->local->sta_mtx); | |
2053 | return false; | |
2054 | } | |
2055 | ||
7852e361 | 2056 | mutex_unlock(&sdata->local->sta_mtx); |
ddf4ac53 | 2057 | |
f2176d72 JO |
2058 | /* |
2059 | * Always handle WMM once after association regardless | |
2060 | * of the first value the AP uses. Setting -1 here has | |
2061 | * that effect because the AP values is an unsigned | |
2062 | * 4-bit value. | |
2063 | */ | |
2064 | ifmgd->wmm_last_param_set = -1; | |
2065 | ||
ddf4ac53 | 2066 | if (elems.wmm_param) |
4ced3f74 | 2067 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
60f8b39c | 2068 | elems.wmm_param_len); |
aa837e1d | 2069 | else |
3abead59 JB |
2070 | ieee80211_set_wmm_default(sdata, false); |
2071 | changed |= BSS_CHANGED_QOS; | |
f0706e82 | 2072 | |
074d46d1 | 2073 | if (elems.ht_operation && elems.wmm_param && |
ab1faead | 2074 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
24398e39 JB |
2075 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2076 | cbss->bssid, false); | |
ae5eb026 | 2077 | |
60f8b39c JB |
2078 | /* set AID and assoc capability, |
2079 | * ieee80211_set_associated() will tell the driver */ | |
2080 | bss_conf->aid = aid; | |
2081 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 2082 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 2083 | |
d524215f FF |
2084 | /* |
2085 | * If we're using 4-addr mode, let the AP know that we're | |
2086 | * doing so, so that it can create the STA VLAN on its side | |
2087 | */ | |
2088 | if (ifmgd->use_4addr) | |
2089 | ieee80211_send_4addr_nullfunc(local, sdata); | |
2090 | ||
15b7b062 | 2091 | /* |
b291ba11 JB |
2092 | * Start timer to probe the connection to the AP now. |
2093 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 2094 | */ |
b291ba11 | 2095 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
d3a910a8 | 2096 | ieee80211_sta_reset_beacon_monitor(sdata); |
15b7b062 | 2097 | |
af6b6374 | 2098 | return true; |
f0706e82 JB |
2099 | } |
2100 | ||
66e67e41 JB |
2101 | static enum rx_mgmt_action __must_check |
2102 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
2103 | struct ieee80211_mgmt *mgmt, size_t len, | |
2104 | struct cfg80211_bss **bss) | |
2105 | { | |
2106 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2107 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
2108 | u16 capab_info, status_code, aid; | |
2109 | struct ieee802_11_elems elems; | |
2110 | u8 *pos; | |
2111 | bool reassoc; | |
2112 | ||
2113 | lockdep_assert_held(&ifmgd->mtx); | |
2114 | ||
2115 | if (!assoc_data) | |
2116 | return RX_MGMT_NONE; | |
b203ca39 | 2117 | if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) |
66e67e41 JB |
2118 | return RX_MGMT_NONE; |
2119 | ||
2120 | /* | |
2121 | * AssocResp and ReassocResp have identical structure, so process both | |
2122 | * of them in this function. | |
2123 | */ | |
2124 | ||
2125 | if (len < 24 + 6) | |
2126 | return RX_MGMT_NONE; | |
2127 | ||
2128 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); | |
2129 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2130 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2131 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
2132 | ||
2133 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
2134 | "status=%d aid=%d)\n", | |
2135 | sdata->name, reassoc ? "Rea" : "A", mgmt->sa, | |
2136 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
2137 | ||
2138 | pos = mgmt->u.assoc_resp.variable; | |
2139 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2140 | ||
2141 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
2142 | elems.timeout_int && elems.timeout_int_len == 5 && | |
2143 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
2144 | u32 tu, ms; | |
2145 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
2146 | ms = tu * 1024 / 1000; | |
2147 | printk(KERN_DEBUG "%s: %pM rejected association temporarily; " | |
2148 | "comeback duration %u TU (%u ms)\n", | |
2149 | sdata->name, mgmt->sa, tu, ms); | |
2150 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); | |
2151 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
2152 | run_again(ifmgd, assoc_data->timeout); | |
2153 | return RX_MGMT_NONE; | |
2154 | } | |
2155 | ||
2156 | *bss = assoc_data->bss; | |
2157 | ||
2158 | if (status_code != WLAN_STATUS_SUCCESS) { | |
2159 | printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n", | |
2160 | sdata->name, mgmt->sa, status_code); | |
2161 | ieee80211_destroy_assoc_data(sdata, false); | |
2162 | } else { | |
2163 | printk(KERN_DEBUG "%s: associated\n", sdata->name); | |
2164 | ||
66e67e41 JB |
2165 | if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) { |
2166 | /* oops -- internal error -- send timeout for now */ | |
79ebfb85 | 2167 | ieee80211_destroy_assoc_data(sdata, true); |
66e67e41 JB |
2168 | sta_info_destroy_addr(sdata, mgmt->bssid); |
2169 | cfg80211_put_bss(*bss); | |
2170 | return RX_MGMT_CFG80211_ASSOC_TIMEOUT; | |
2171 | } | |
79ebfb85 JB |
2172 | |
2173 | /* | |
2174 | * destroy assoc_data afterwards, as otherwise an idle | |
2175 | * recalc after assoc_data is NULL but before associated | |
2176 | * is set can cause the interface to go idle | |
2177 | */ | |
2178 | ieee80211_destroy_assoc_data(sdata, true); | |
66e67e41 JB |
2179 | } |
2180 | ||
2181 | return RX_MGMT_CFG80211_RX_ASSOC; | |
2182 | } | |
98c8fccf JB |
2183 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
2184 | struct ieee80211_mgmt *mgmt, | |
2185 | size_t len, | |
2186 | struct ieee80211_rx_status *rx_status, | |
2187 | struct ieee802_11_elems *elems, | |
2188 | bool beacon) | |
2189 | { | |
2190 | struct ieee80211_local *local = sdata->local; | |
2191 | int freq; | |
c2b13452 | 2192 | struct ieee80211_bss *bss; |
98c8fccf | 2193 | struct ieee80211_channel *channel; |
56007a02 JB |
2194 | bool need_ps = false; |
2195 | ||
66e67e41 | 2196 | if (sdata->u.mgd.associated && |
b203ca39 | 2197 | ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) { |
56007a02 JB |
2198 | bss = (void *)sdata->u.mgd.associated->priv; |
2199 | /* not previously set so we may need to recalc */ | |
2200 | need_ps = !bss->dtim_period; | |
2201 | } | |
98c8fccf JB |
2202 | |
2203 | if (elems->ds_params && elems->ds_params_len == 1) | |
59eb21a6 BR |
2204 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
2205 | rx_status->band); | |
98c8fccf JB |
2206 | else |
2207 | freq = rx_status->freq; | |
2208 | ||
2209 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2210 | ||
2211 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2212 | return; | |
2213 | ||
98c8fccf | 2214 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 2215 | channel, beacon); |
77fdaa12 JB |
2216 | if (bss) |
2217 | ieee80211_rx_bss_put(local, bss); | |
2218 | ||
2219 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
2220 | return; |
2221 | ||
56007a02 JB |
2222 | if (need_ps) { |
2223 | mutex_lock(&local->iflist_mtx); | |
2224 | ieee80211_recalc_ps(local, -1); | |
2225 | mutex_unlock(&local->iflist_mtx); | |
2226 | } | |
2227 | ||
c481ec97 | 2228 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 2229 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 2230 | ETH_ALEN) == 0)) { |
c481ec97 S |
2231 | struct ieee80211_channel_sw_ie *sw_elem = |
2232 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
5ce6e438 JB |
2233 | ieee80211_sta_process_chanswitch(sdata, sw_elem, |
2234 | bss, rx_status->mactime); | |
c481ec97 | 2235 | } |
f0706e82 JB |
2236 | } |
2237 | ||
2238 | ||
f698d856 | 2239 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 2240 | struct sk_buff *skb) |
f0706e82 | 2241 | { |
af6b6374 | 2242 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 2243 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
2244 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
2245 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
2246 | struct ieee802_11_elems elems; |
2247 | ||
15b7b062 KV |
2248 | ifmgd = &sdata->u.mgd; |
2249 | ||
77fdaa12 JB |
2250 | ASSERT_MGD_MTX(ifmgd); |
2251 | ||
b203ca39 | 2252 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) |
8e7cdbb6 TW |
2253 | return; /* ignore ProbeResp to foreign address */ |
2254 | ||
ae6a44e3 EK |
2255 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2256 | if (baselen > len) | |
2257 | return; | |
2258 | ||
2259 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2260 | &elems); | |
2261 | ||
98c8fccf | 2262 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 2263 | |
77fdaa12 | 2264 | if (ifmgd->associated && |
b203ca39 | 2265 | ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
4e5ff376 | 2266 | ieee80211_reset_ap_probe(sdata); |
66e67e41 JB |
2267 | |
2268 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && | |
b203ca39 | 2269 | ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) { |
66e67e41 JB |
2270 | /* got probe response, continue with auth */ |
2271 | printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name); | |
2272 | ifmgd->auth_data->tries = 0; | |
2273 | ifmgd->auth_data->timeout = jiffies; | |
2274 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2275 | } | |
f0706e82 JB |
2276 | } |
2277 | ||
d91f36db JB |
2278 | /* |
2279 | * This is the canonical list of information elements we care about, | |
2280 | * the filter code also gives us all changes to the Microsoft OUI | |
2281 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
2282 | * | |
2283 | * We implement beacon filtering in software since that means we can | |
2284 | * avoid processing the frame here and in cfg80211, and userspace | |
2285 | * will not be able to tell whether the hardware supports it or not. | |
2286 | * | |
2287 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
2288 | * add items it requires. It also needs to be able to tell us to | |
2289 | * look out for other vendor IEs. | |
2290 | */ | |
2291 | static const u64 care_about_ies = | |
1d4df3a5 JB |
2292 | (1ULL << WLAN_EID_COUNTRY) | |
2293 | (1ULL << WLAN_EID_ERP_INFO) | | |
2294 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
2295 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
2296 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
074d46d1 | 2297 | (1ULL << WLAN_EID_HT_OPERATION); |
d91f36db | 2298 | |
f698d856 | 2299 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2300 | struct ieee80211_mgmt *mgmt, |
2301 | size_t len, | |
2302 | struct ieee80211_rx_status *rx_status) | |
2303 | { | |
d91f36db | 2304 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 2305 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
2306 | size_t baselen; |
2307 | struct ieee802_11_elems elems; | |
f698d856 | 2308 | struct ieee80211_local *local = sdata->local; |
471b3efd | 2309 | u32 changed = 0; |
d91f36db | 2310 | bool erp_valid, directed_tim = false; |
7a5158ef | 2311 | u8 erp_value = 0; |
d91f36db | 2312 | u32 ncrc; |
77fdaa12 JB |
2313 | u8 *bssid; |
2314 | ||
66e67e41 | 2315 | lockdep_assert_held(&ifmgd->mtx); |
f0706e82 | 2316 | |
ae6a44e3 EK |
2317 | /* Process beacon from the current BSS */ |
2318 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2319 | if (baselen > len) | |
2320 | return; | |
2321 | ||
d91f36db | 2322 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 2323 | return; |
f0706e82 | 2324 | |
66e67e41 | 2325 | if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon && |
b203ca39 | 2326 | ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { |
66e67e41 JB |
2327 | ieee802_11_parse_elems(mgmt->u.beacon.variable, |
2328 | len - baselen, &elems); | |
77fdaa12 | 2329 | |
66e67e41 JB |
2330 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2331 | false); | |
2332 | ifmgd->assoc_data->have_beacon = true; | |
2333 | ifmgd->assoc_data->sent_assoc = false; | |
2334 | /* continue assoc process */ | |
2335 | ifmgd->assoc_data->timeout = jiffies; | |
2336 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2337 | return; | |
2338 | } | |
77fdaa12 | 2339 | |
66e67e41 | 2340 | if (!ifmgd->associated || |
b203ca39 | 2341 | !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) |
f0706e82 | 2342 | return; |
66e67e41 | 2343 | bssid = ifmgd->associated->bssid; |
f0706e82 | 2344 | |
17e4ec14 JM |
2345 | /* Track average RSSI from the Beacon frames of the current AP */ |
2346 | ifmgd->last_beacon_signal = rx_status->signal; | |
2347 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
2348 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
3ba06c6f | 2349 | ifmgd->ave_beacon_signal = rx_status->signal * 16; |
17e4ec14 | 2350 | ifmgd->last_cqm_event_signal = 0; |
391a200a | 2351 | ifmgd->count_beacon_signal = 1; |
615f7b9b | 2352 | ifmgd->last_ave_beacon_signal = 0; |
17e4ec14 JM |
2353 | } else { |
2354 | ifmgd->ave_beacon_signal = | |
2355 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
2356 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
2357 | ifmgd->ave_beacon_signal) / 16; | |
391a200a | 2358 | ifmgd->count_beacon_signal++; |
17e4ec14 | 2359 | } |
615f7b9b MV |
2360 | |
2361 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && | |
2362 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { | |
2363 | int sig = ifmgd->ave_beacon_signal; | |
2364 | int last_sig = ifmgd->last_ave_beacon_signal; | |
2365 | ||
2366 | /* | |
2367 | * if signal crosses either of the boundaries, invoke callback | |
2368 | * with appropriate parameters | |
2369 | */ | |
2370 | if (sig > ifmgd->rssi_max_thold && | |
2371 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { | |
2372 | ifmgd->last_ave_beacon_signal = sig; | |
2373 | drv_rssi_callback(local, RSSI_EVENT_HIGH); | |
2374 | } else if (sig < ifmgd->rssi_min_thold && | |
2375 | (last_sig >= ifmgd->rssi_max_thold || | |
2376 | last_sig == 0)) { | |
2377 | ifmgd->last_ave_beacon_signal = sig; | |
2378 | drv_rssi_callback(local, RSSI_EVENT_LOW); | |
2379 | } | |
2380 | } | |
2381 | ||
17e4ec14 | 2382 | if (bss_conf->cqm_rssi_thold && |
391a200a | 2383 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
ea086359 | 2384 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
17e4ec14 JM |
2385 | int sig = ifmgd->ave_beacon_signal / 16; |
2386 | int last_event = ifmgd->last_cqm_event_signal; | |
2387 | int thold = bss_conf->cqm_rssi_thold; | |
2388 | int hyst = bss_conf->cqm_rssi_hyst; | |
2389 | if (sig < thold && | |
2390 | (last_event == 0 || sig < last_event - hyst)) { | |
2391 | ifmgd->last_cqm_event_signal = sig; | |
2392 | ieee80211_cqm_rssi_notify( | |
2393 | &sdata->vif, | |
2394 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
2395 | GFP_KERNEL); | |
2396 | } else if (sig > thold && | |
2397 | (last_event == 0 || sig > last_event + hyst)) { | |
2398 | ifmgd->last_cqm_event_signal = sig; | |
2399 | ieee80211_cqm_rssi_notify( | |
2400 | &sdata->vif, | |
2401 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
2402 | GFP_KERNEL); | |
2403 | } | |
2404 | } | |
2405 | ||
b291ba11 | 2406 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 | 2407 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
e87cc472 JP |
2408 | net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n", |
2409 | sdata->name); | |
92778180 | 2410 | #endif |
b291ba11 | 2411 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
2412 | mutex_lock(&local->iflist_mtx); |
2413 | ieee80211_recalc_ps(local, -1); | |
2414 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
2415 | } |
2416 | ||
b291ba11 JB |
2417 | /* |
2418 | * Push the beacon loss detection into the future since | |
2419 | * we are processing a beacon from the AP just now. | |
2420 | */ | |
d3a910a8 | 2421 | ieee80211_sta_reset_beacon_monitor(sdata); |
b291ba11 | 2422 | |
d91f36db JB |
2423 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
2424 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
2425 | len - baselen, &elems, | |
2426 | care_about_ies, ncrc); | |
2427 | ||
2428 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
2429 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
2430 | ifmgd->aid); | |
d91f36db | 2431 | |
d8ec4433 | 2432 | if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) { |
30196673 JM |
2433 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2434 | true); | |
d91f36db | 2435 | |
4ced3f74 | 2436 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
30196673 JM |
2437 | elems.wmm_param_len); |
2438 | } | |
fe3fa827 | 2439 | |
25c9c875 | 2440 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 2441 | if (directed_tim) { |
572e0012 | 2442 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
70b12f26 RW |
2443 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
2444 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2445 | ieee80211_hw_config(local, | |
2446 | IEEE80211_CONF_CHANGE_PS); | |
2447 | } | |
572e0012 | 2448 | ieee80211_send_nullfunc(local, sdata, 0); |
6f0756a3 | 2449 | } else if (!local->pspolling && sdata->u.mgd.powersave) { |
572e0012 KV |
2450 | local->pspolling = true; |
2451 | ||
2452 | /* | |
2453 | * Here is assumed that the driver will be | |
2454 | * able to send ps-poll frame and receive a | |
2455 | * response even though power save mode is | |
2456 | * enabled, but some drivers might require | |
2457 | * to disable power save here. This needs | |
2458 | * to be investigated. | |
2459 | */ | |
2460 | ieee80211_send_pspoll(local, sdata); | |
2461 | } | |
a97b77b9 VN |
2462 | } |
2463 | } | |
7a5158ef | 2464 | |
d8ec4433 | 2465 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
30196673 JM |
2466 | return; |
2467 | ifmgd->beacon_crc = ncrc; | |
d8ec4433 | 2468 | ifmgd->beacon_crc_valid = true; |
30196673 | 2469 | |
7a5158ef JB |
2470 | if (elems.erp_info && elems.erp_info_len >= 1) { |
2471 | erp_valid = true; | |
2472 | erp_value = elems.erp_info[0]; | |
2473 | } else { | |
2474 | erp_valid = false; | |
50c4afb9 | 2475 | } |
7a5158ef JB |
2476 | changed |= ieee80211_handle_bss_capability(sdata, |
2477 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
2478 | erp_valid, erp_value); | |
f0706e82 | 2479 | |
d3c990fb | 2480 | |
074d46d1 | 2481 | if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param && |
ab1faead | 2482 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 | 2483 | struct ieee80211_supported_band *sband; |
ae5eb026 JB |
2484 | |
2485 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2486 | ||
24398e39 JB |
2487 | changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation, |
2488 | bssid, true); | |
d3c990fb RR |
2489 | } |
2490 | ||
8b19e6ca | 2491 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 2492 | if (elems.country_elem) { |
a8302de9 VT |
2493 | /* TODO: IBSS also needs this */ |
2494 | if (elems.pwr_constr_elem) | |
2495 | ieee80211_handle_pwr_constr(sdata, | |
2496 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
2497 | elems.pwr_constr_elem, | |
2498 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
2499 | } |
2500 | ||
471b3efd | 2501 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2502 | } |
2503 | ||
1fa57d01 JB |
2504 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
2505 | struct sk_buff *skb) | |
f0706e82 | 2506 | { |
77fdaa12 | 2507 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2508 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 2509 | struct ieee80211_mgmt *mgmt; |
66e67e41 | 2510 | struct cfg80211_bss *bss = NULL; |
77fdaa12 | 2511 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
2512 | u16 fc; |
2513 | ||
f0706e82 JB |
2514 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
2515 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2516 | fc = le16_to_cpu(mgmt->frame_control); | |
2517 | ||
77fdaa12 JB |
2518 | mutex_lock(&ifmgd->mtx); |
2519 | ||
66e67e41 JB |
2520 | switch (fc & IEEE80211_FCTL_STYPE) { |
2521 | case IEEE80211_STYPE_BEACON: | |
2522 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); | |
2523 | break; | |
2524 | case IEEE80211_STYPE_PROBE_RESP: | |
2525 | ieee80211_rx_mgmt_probe_resp(sdata, skb); | |
2526 | break; | |
2527 | case IEEE80211_STYPE_AUTH: | |
2528 | rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
2529 | break; | |
2530 | case IEEE80211_STYPE_DEAUTH: | |
2531 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
2532 | break; | |
2533 | case IEEE80211_STYPE_DISASSOC: | |
2534 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
2535 | break; | |
2536 | case IEEE80211_STYPE_ASSOC_RESP: | |
2537 | case IEEE80211_STYPE_REASSOC_RESP: | |
2538 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); | |
2539 | break; | |
2540 | case IEEE80211_STYPE_ACTION: | |
2541 | switch (mgmt->u.action.category) { | |
2542 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
2543 | ieee80211_sta_process_chanswitch(sdata, | |
2544 | &mgmt->u.action.u.chan_switch.sw_elem, | |
2545 | (void *)ifmgd->associated->priv, | |
2546 | rx_status->mactime); | |
77fdaa12 | 2547 | break; |
77fdaa12 | 2548 | } |
77fdaa12 | 2549 | } |
77fdaa12 JB |
2550 | mutex_unlock(&ifmgd->mtx); |
2551 | ||
66e67e41 JB |
2552 | switch (rma) { |
2553 | case RX_MGMT_NONE: | |
2554 | /* no action */ | |
2555 | break; | |
2556 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 2557 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
66e67e41 JB |
2558 | break; |
2559 | case RX_MGMT_CFG80211_DISASSOC: | |
2560 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
2561 | break; | |
2562 | case RX_MGMT_CFG80211_RX_AUTH: | |
2563 | cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len); | |
2564 | break; | |
2565 | case RX_MGMT_CFG80211_RX_ASSOC: | |
2566 | cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len); | |
2567 | break; | |
2568 | case RX_MGMT_CFG80211_ASSOC_TIMEOUT: | |
2569 | cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid); | |
2570 | break; | |
2571 | default: | |
2572 | WARN(1, "unexpected: %d", rma); | |
b054b747 | 2573 | } |
f0706e82 JB |
2574 | } |
2575 | ||
9c6bd790 | 2576 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2577 | { |
60f8b39c JB |
2578 | struct ieee80211_sub_if_data *sdata = |
2579 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2580 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2581 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2582 | |
5bb644a0 JB |
2583 | if (local->quiescing) { |
2584 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2585 | return; | |
2586 | } | |
2587 | ||
64592c8f | 2588 | ieee80211_queue_work(&local->hw, &sdata->work); |
f0706e82 JB |
2589 | } |
2590 | ||
04ac3c0e | 2591 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
95acac61 | 2592 | u8 *bssid, u8 reason) |
04ac3c0e FF |
2593 | { |
2594 | struct ieee80211_local *local = sdata->local; | |
2595 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
5fef7dbc | 2596 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
04ac3c0e FF |
2597 | |
2598 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
2599 | IEEE80211_STA_BEACON_POLL); | |
2600 | ||
37ad3888 JB |
2601 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, |
2602 | false, frame_buf); | |
04ac3c0e | 2603 | mutex_unlock(&ifmgd->mtx); |
37ad3888 | 2604 | |
04ac3c0e FF |
2605 | /* |
2606 | * must be outside lock due to cfg80211, | |
2607 | * but that's not a problem. | |
2608 | */ | |
5fef7dbc | 2609 | cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
fcac4fb0 FF |
2610 | |
2611 | mutex_lock(&local->mtx); | |
2612 | ieee80211_recalc_idle(local); | |
2613 | mutex_unlock(&local->mtx); | |
2614 | ||
04ac3c0e FF |
2615 | mutex_lock(&ifmgd->mtx); |
2616 | } | |
2617 | ||
66e67e41 JB |
2618 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) |
2619 | { | |
2620 | struct ieee80211_local *local = sdata->local; | |
2621 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2622 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; | |
2623 | ||
2624 | lockdep_assert_held(&ifmgd->mtx); | |
2625 | ||
2626 | if (WARN_ON_ONCE(!auth_data)) | |
2627 | return -EINVAL; | |
2628 | ||
66e67e41 JB |
2629 | auth_data->tries++; |
2630 | ||
2631 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { | |
2632 | printk(KERN_DEBUG "%s: authentication with %pM timed out\n", | |
2633 | sdata->name, auth_data->bss->bssid); | |
2634 | ||
2635 | /* | |
2636 | * Most likely AP is not in the range so remove the | |
2637 | * bss struct for that AP. | |
2638 | */ | |
2639 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); | |
2640 | ||
2641 | return -ETIMEDOUT; | |
2642 | } | |
2643 | ||
2644 | if (auth_data->bss->proberesp_ies) { | |
2645 | printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n", | |
2646 | sdata->name, auth_data->bss->bssid, auth_data->tries, | |
2647 | IEEE80211_AUTH_MAX_TRIES); | |
2648 | ||
2649 | auth_data->expected_transaction = 2; | |
2650 | ieee80211_send_auth(sdata, 1, auth_data->algorithm, | |
2651 | auth_data->ie, auth_data->ie_len, | |
2652 | auth_data->bss->bssid, | |
2653 | auth_data->bss->bssid, NULL, 0, 0); | |
2654 | } else { | |
2655 | const u8 *ssidie; | |
2656 | ||
2657 | printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n", | |
2658 | sdata->name, auth_data->bss->bssid, auth_data->tries, | |
2659 | IEEE80211_AUTH_MAX_TRIES); | |
2660 | ||
2661 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); | |
2662 | if (!ssidie) | |
2663 | return -EINVAL; | |
2664 | /* | |
2665 | * Direct probe is sent to broadcast address as some APs | |
2666 | * will not answer to direct packet in unassociated state. | |
2667 | */ | |
2668 | ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], | |
2669 | NULL, 0, (u32) -1, true, false); | |
2670 | } | |
2671 | ||
2672 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
2673 | run_again(ifmgd, auth_data->timeout); | |
2674 | ||
2675 | return 0; | |
2676 | } | |
2677 | ||
2678 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) | |
2679 | { | |
2680 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2681 | struct ieee80211_local *local = sdata->local; | |
2682 | ||
2683 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
2684 | ||
66e67e41 JB |
2685 | assoc_data->tries++; |
2686 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { | |
2687 | printk(KERN_DEBUG "%s: association with %pM timed out\n", | |
2688 | sdata->name, assoc_data->bss->bssid); | |
2689 | ||
2690 | /* | |
2691 | * Most likely AP is not in the range so remove the | |
2692 | * bss struct for that AP. | |
2693 | */ | |
2694 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); | |
2695 | ||
2696 | return -ETIMEDOUT; | |
2697 | } | |
2698 | ||
2699 | printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n", | |
2700 | sdata->name, assoc_data->bss->bssid, assoc_data->tries, | |
2701 | IEEE80211_ASSOC_MAX_TRIES); | |
2702 | ieee80211_send_assoc(sdata); | |
2703 | ||
2704 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
2705 | run_again(&sdata->u.mgd, assoc_data->timeout); | |
2706 | ||
2707 | return 0; | |
2708 | } | |
2709 | ||
1fa57d01 | 2710 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
9c6bd790 | 2711 | { |
9c6bd790 | 2712 | struct ieee80211_local *local = sdata->local; |
1fa57d01 | 2713 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2714 | |
77fdaa12 JB |
2715 | mutex_lock(&ifmgd->mtx); |
2716 | ||
66e67e41 JB |
2717 | if (ifmgd->auth_data && |
2718 | time_after(jiffies, ifmgd->auth_data->timeout)) { | |
2719 | if (ifmgd->auth_data->done) { | |
2720 | /* | |
2721 | * ok ... we waited for assoc but userspace didn't, | |
2722 | * so let's just kill the auth data | |
2723 | */ | |
2724 | ieee80211_destroy_auth_data(sdata, false); | |
2725 | } else if (ieee80211_probe_auth(sdata)) { | |
2726 | u8 bssid[ETH_ALEN]; | |
2727 | ||
2728 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
2729 | ||
2730 | ieee80211_destroy_auth_data(sdata, false); | |
2731 | ||
2732 | mutex_unlock(&ifmgd->mtx); | |
2733 | cfg80211_send_auth_timeout(sdata->dev, bssid); | |
2734 | mutex_lock(&ifmgd->mtx); | |
2735 | } | |
2736 | } else if (ifmgd->auth_data) | |
2737 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2738 | ||
2739 | if (ifmgd->assoc_data && | |
2740 | time_after(jiffies, ifmgd->assoc_data->timeout)) { | |
2741 | if (!ifmgd->assoc_data->have_beacon || | |
2742 | ieee80211_do_assoc(sdata)) { | |
2743 | u8 bssid[ETH_ALEN]; | |
2744 | ||
2745 | memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN); | |
2746 | ||
2747 | ieee80211_destroy_assoc_data(sdata, false); | |
2748 | ||
2749 | mutex_unlock(&ifmgd->mtx); | |
2750 | cfg80211_send_assoc_timeout(sdata->dev, bssid); | |
2751 | mutex_lock(&ifmgd->mtx); | |
2752 | } | |
2753 | } else if (ifmgd->assoc_data) | |
2754 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2755 | ||
b291ba11 JB |
2756 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
2757 | IEEE80211_STA_CONNECTION_POLL) && | |
2758 | ifmgd->associated) { | |
a43abf29 | 2759 | u8 bssid[ETH_ALEN]; |
72a8a3ed | 2760 | int max_tries; |
a43abf29 | 2761 | |
0c1ad2ca | 2762 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
4e5ff376 | 2763 | |
72a8a3ed | 2764 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
180205bd | 2765 | max_tries = max_nullfunc_tries; |
72a8a3ed | 2766 | else |
180205bd | 2767 | max_tries = max_probe_tries; |
72a8a3ed | 2768 | |
4e5ff376 FF |
2769 | /* ACK received for nullfunc probing frame */ |
2770 | if (!ifmgd->probe_send_count) | |
2771 | ieee80211_reset_ap_probe(sdata); | |
04ac3c0e FF |
2772 | else if (ifmgd->nullfunc_failed) { |
2773 | if (ifmgd->probe_send_count < max_tries) { | |
2774 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2775 | wiphy_debug(local->hw.wiphy, | |
2776 | "%s: No ack for nullfunc frame to" | |
bfc31df3 | 2777 | " AP %pM, try %d/%i\n", |
04ac3c0e | 2778 | sdata->name, bssid, |
bfc31df3 | 2779 | ifmgd->probe_send_count, max_tries); |
04ac3c0e FF |
2780 | #endif |
2781 | ieee80211_mgd_probe_ap_send(sdata); | |
2782 | } else { | |
2783 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2784 | wiphy_debug(local->hw.wiphy, | |
2785 | "%s: No ack for nullfunc frame to" | |
2786 | " AP %pM, disconnecting.\n", | |
c658e5db | 2787 | sdata->name, bssid); |
04ac3c0e | 2788 | #endif |
95acac61 JB |
2789 | ieee80211_sta_connection_lost(sdata, bssid, |
2790 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e FF |
2791 | } |
2792 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) | |
b291ba11 | 2793 | run_again(ifmgd, ifmgd->probe_timeout); |
04ac3c0e FF |
2794 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
2795 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2796 | wiphy_debug(local->hw.wiphy, | |
2797 | "%s: Failed to send nullfunc to AP %pM" | |
2798 | " after %dms, disconnecting.\n", | |
2799 | sdata->name, | |
180205bd | 2800 | bssid, probe_wait_ms); |
04ac3c0e | 2801 | #endif |
95acac61 JB |
2802 | ieee80211_sta_connection_lost(sdata, bssid, |
2803 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e | 2804 | } else if (ifmgd->probe_send_count < max_tries) { |
a43abf29 | 2805 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b38afa87 BG |
2806 | wiphy_debug(local->hw.wiphy, |
2807 | "%s: No probe response from AP %pM" | |
bfc31df3 | 2808 | " after %dms, try %d/%i\n", |
b38afa87 | 2809 | sdata->name, |
180205bd | 2810 | bssid, probe_wait_ms, |
bfc31df3 | 2811 | ifmgd->probe_send_count, max_tries); |
a43abf29 ML |
2812 | #endif |
2813 | ieee80211_mgd_probe_ap_send(sdata); | |
2814 | } else { | |
b291ba11 JB |
2815 | /* |
2816 | * We actually lost the connection ... or did we? | |
2817 | * Let's make sure! | |
2818 | */ | |
b38afa87 BG |
2819 | wiphy_debug(local->hw.wiphy, |
2820 | "%s: No probe response from AP %pM" | |
2821 | " after %dms, disconnecting.\n", | |
2822 | sdata->name, | |
180205bd | 2823 | bssid, probe_wait_ms); |
04ac3c0e | 2824 | |
95acac61 JB |
2825 | ieee80211_sta_connection_lost(sdata, bssid, |
2826 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
b291ba11 JB |
2827 | } |
2828 | } | |
2829 | ||
77fdaa12 | 2830 | mutex_unlock(&ifmgd->mtx); |
66e67e41 JB |
2831 | |
2832 | mutex_lock(&local->mtx); | |
2833 | ieee80211_recalc_idle(local); | |
2834 | mutex_unlock(&local->mtx); | |
f0706e82 JB |
2835 | } |
2836 | ||
b291ba11 JB |
2837 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
2838 | { | |
2839 | struct ieee80211_sub_if_data *sdata = | |
2840 | (struct ieee80211_sub_if_data *) data; | |
2841 | struct ieee80211_local *local = sdata->local; | |
2842 | ||
2843 | if (local->quiescing) | |
2844 | return; | |
2845 | ||
1e4dcd01 JO |
2846 | ieee80211_queue_work(&sdata->local->hw, |
2847 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
2848 | } |
2849 | ||
2850 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
2851 | { | |
2852 | struct ieee80211_sub_if_data *sdata = | |
2853 | (struct ieee80211_sub_if_data *) data; | |
2854 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2855 | struct ieee80211_local *local = sdata->local; | |
2856 | ||
2857 | if (local->quiescing) | |
2858 | return; | |
2859 | ||
42935eca | 2860 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
2861 | } |
2862 | ||
2863 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
2864 | { | |
2865 | struct ieee80211_sub_if_data *sdata = | |
2866 | container_of(work, struct ieee80211_sub_if_data, | |
2867 | u.mgd.monitor_work); | |
2868 | ||
2869 | ieee80211_mgd_probe_ap(sdata, false); | |
2870 | } | |
2871 | ||
9c6bd790 JB |
2872 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2873 | { | |
494f1fe5 EP |
2874 | u32 flags; |
2875 | ||
ad935687 | 2876 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
2877 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
2878 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 2879 | |
b291ba11 | 2880 | /* let's probe the connection once */ |
494f1fe5 EP |
2881 | flags = sdata->local->hw.flags; |
2882 | if (!(flags & IEEE80211_HW_CONNECTION_MONITOR)) | |
2883 | ieee80211_queue_work(&sdata->local->hw, | |
2884 | &sdata->u.mgd.monitor_work); | |
b291ba11 | 2885 | /* and do all the other regular work too */ |
64592c8f | 2886 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
ad935687 | 2887 | } |
9c6bd790 | 2888 | } |
f0706e82 | 2889 | |
5bb644a0 JB |
2890 | #ifdef CONFIG_PM |
2891 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
2892 | { | |
2893 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2894 | ||
2895 | /* | |
2896 | * we need to use atomic bitops for the running bits | |
2897 | * only because both timers might fire at the same | |
2898 | * time -- the code here is properly synchronised. | |
2899 | */ | |
2900 | ||
d1f5b7a3 JB |
2901 | cancel_work_sync(&ifmgd->request_smps_work); |
2902 | ||
0ecfe806 | 2903 | cancel_work_sync(&ifmgd->monitor_work); |
1e4dcd01 | 2904 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
5bb644a0 JB |
2905 | if (del_timer_sync(&ifmgd->timer)) |
2906 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2907 | ||
2908 | cancel_work_sync(&ifmgd->chswitch_work); | |
2909 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
2910 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 | 2911 | |
b291ba11 JB |
2912 | /* these will just be re-established on connection */ |
2913 | del_timer_sync(&ifmgd->conn_mon_timer); | |
2914 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
2915 | } |
2916 | ||
2917 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
2918 | { | |
2919 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2920 | ||
676b58c2 RM |
2921 | if (!ifmgd->associated) |
2922 | return; | |
2923 | ||
95acac61 JB |
2924 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
2925 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; | |
2926 | mutex_lock(&ifmgd->mtx); | |
2927 | if (ifmgd->associated) { | |
2928 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2929 | wiphy_debug(sdata->local->hw.wiphy, | |
2930 | "%s: driver requested disconnect after resume.\n", | |
2931 | sdata->name); | |
2932 | #endif | |
2933 | ieee80211_sta_connection_lost(sdata, | |
2934 | ifmgd->associated->bssid, | |
2935 | WLAN_REASON_UNSPECIFIED); | |
2936 | mutex_unlock(&ifmgd->mtx); | |
2937 | return; | |
2938 | } | |
2939 | mutex_unlock(&ifmgd->mtx); | |
2940 | } | |
2941 | ||
5bb644a0 JB |
2942 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
2943 | add_timer(&ifmgd->timer); | |
2944 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
2945 | add_timer(&ifmgd->chswitch_timer); | |
c8a7972c | 2946 | ieee80211_sta_reset_beacon_monitor(sdata); |
46090979 | 2947 | ieee80211_restart_sta_timer(sdata); |
5bb644a0 JB |
2948 | } |
2949 | #endif | |
2950 | ||
9c6bd790 JB |
2951 | /* interface setup */ |
2952 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2953 | { |
46900298 | 2954 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 2955 | |
46900298 | 2956 | ifmgd = &sdata->u.mgd; |
b291ba11 | 2957 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 2958 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
2959 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
2960 | ieee80211_beacon_connection_loss_work); | |
d1f5b7a3 | 2961 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work); |
46900298 | 2962 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2963 | (unsigned long) sdata); |
b291ba11 JB |
2964 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
2965 | (unsigned long) sdata); | |
2966 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
2967 | (unsigned long) sdata); | |
46900298 | 2968 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2969 | (unsigned long) sdata); |
9c6bd790 | 2970 | |
ab1faead | 2971 | ifmgd->flags = 0; |
1478acb3 | 2972 | ifmgd->powersave = sdata->wdev.ps; |
dc41e4d4 EP |
2973 | ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
2974 | ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; | |
bbbdff9e | 2975 | |
77fdaa12 | 2976 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
2977 | |
2978 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
2979 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
2980 | else | |
2981 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
2982 | } |
2983 | ||
77fdaa12 JB |
2984 | /* scan finished notification */ |
2985 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 2986 | { |
77fdaa12 | 2987 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 2988 | |
77fdaa12 JB |
2989 | /* Restart STA timers */ |
2990 | rcu_read_lock(); | |
2991 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2992 | ieee80211_restart_sta_timer(sdata); | |
2993 | rcu_read_unlock(); | |
2994 | } | |
60f8b39c | 2995 | |
77fdaa12 JB |
2996 | int ieee80211_max_network_latency(struct notifier_block *nb, |
2997 | unsigned long data, void *dummy) | |
2998 | { | |
2999 | s32 latency_usec = (s32) data; | |
3000 | struct ieee80211_local *local = | |
3001 | container_of(nb, struct ieee80211_local, | |
3002 | network_latency_notifier); | |
1fa6f4af | 3003 | |
77fdaa12 JB |
3004 | mutex_lock(&local->iflist_mtx); |
3005 | ieee80211_recalc_ps(local, latency_usec); | |
3006 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 3007 | |
77fdaa12 | 3008 | return 0; |
9c6bd790 JB |
3009 | } |
3010 | ||
a1cf775d | 3011 | static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, |
5d6a1b06 | 3012 | struct cfg80211_bss *cbss, bool assoc) |
a1cf775d JB |
3013 | { |
3014 | struct ieee80211_local *local = sdata->local; | |
3015 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
5d6a1b06 | 3016 | struct ieee80211_bss *bss = (void *)cbss->priv; |
a1cf775d JB |
3017 | struct sta_info *sta; |
3018 | bool have_sta = false; | |
3019 | int err; | |
24398e39 JB |
3020 | int ht_cfreq; |
3021 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
3022 | const u8 *ht_oper_ie; | |
3023 | const struct ieee80211_ht_operation *ht_oper = NULL; | |
3024 | struct ieee80211_supported_band *sband; | |
a1cf775d JB |
3025 | |
3026 | if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) | |
3027 | return -EINVAL; | |
3028 | ||
3029 | if (assoc) { | |
3030 | rcu_read_lock(); | |
5d6a1b06 | 3031 | have_sta = sta_info_get(sdata, cbss->bssid); |
a1cf775d JB |
3032 | rcu_read_unlock(); |
3033 | } | |
3034 | ||
3035 | if (!have_sta) { | |
5d6a1b06 | 3036 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
a1cf775d JB |
3037 | if (!sta) |
3038 | return -ENOMEM; | |
3039 | } | |
3040 | ||
3041 | mutex_lock(&local->mtx); | |
3042 | ieee80211_recalc_idle(sdata->local); | |
3043 | mutex_unlock(&local->mtx); | |
3044 | ||
3045 | /* switch to the right channel */ | |
24398e39 JB |
3046 | sband = local->hw.wiphy->bands[cbss->channel->band]; |
3047 | ||
3048 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ; | |
3049 | ||
3050 | if (sband->ht_cap.ht_supported) { | |
3051 | ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION, | |
3052 | cbss->information_elements, | |
3053 | cbss->len_information_elements); | |
3054 | if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) | |
3055 | ht_oper = (void *)(ht_oper_ie + 2); | |
3056 | } | |
3057 | ||
3058 | if (ht_oper) { | |
3059 | ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, | |
3060 | cbss->channel->band); | |
3061 | /* check that channel matches the right operating channel */ | |
3062 | if (cbss->channel->center_freq != ht_cfreq) { | |
3063 | /* | |
3064 | * It's possible that some APs are confused here; | |
3065 | * Netgear WNDR3700 sometimes reports 4 higher than | |
3066 | * the actual channel in association responses, but | |
3067 | * since we look at probe response/beacon data here | |
3068 | * it should be OK. | |
3069 | */ | |
3070 | printk(KERN_DEBUG | |
3071 | "%s: Wrong control channel: center-freq: %d" | |
3072 | " ht-cfreq: %d ht->primary_chan: %d" | |
3073 | " band: %d. Disabling HT.\n", | |
3074 | sdata->name, cbss->channel->center_freq, | |
3075 | ht_cfreq, ht_oper->primary_chan, | |
3076 | cbss->channel->band); | |
3077 | ht_oper = NULL; | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | if (ht_oper) { | |
3082 | channel_type = NL80211_CHAN_HT20; | |
3083 | ||
3084 | if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { | |
3085 | switch (ht_oper->ht_param & | |
3086 | IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
3087 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
3088 | channel_type = NL80211_CHAN_HT40PLUS; | |
3089 | break; | |
3090 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
3091 | channel_type = NL80211_CHAN_HT40MINUS; | |
3092 | break; | |
3093 | } | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | if (!ieee80211_set_channel_type(local, sdata, channel_type)) { | |
3098 | /* can only fail due to HT40+/- mismatch */ | |
3099 | channel_type = NL80211_CHAN_HT20; | |
3100 | printk(KERN_DEBUG | |
3101 | "%s: disabling 40 MHz due to multi-vif mismatch\n", | |
3102 | sdata->name); | |
3103 | ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ; | |
3104 | WARN_ON(!ieee80211_set_channel_type(local, sdata, | |
3105 | channel_type)); | |
3106 | } | |
3107 | ||
5d6a1b06 | 3108 | local->oper_channel = cbss->channel; |
24398e39 | 3109 | ieee80211_hw_config(local, 0); |
a1cf775d JB |
3110 | |
3111 | if (!have_sta) { | |
5d6a1b06 JB |
3112 | u32 rates = 0, basic_rates = 0; |
3113 | bool have_higher_than_11mbit; | |
3114 | int min_rate = INT_MAX, min_rate_index = -1; | |
3115 | ||
5d6a1b06 JB |
3116 | ieee80211_get_rates(sband, bss->supp_rates, |
3117 | bss->supp_rates_len, | |
3118 | &rates, &basic_rates, | |
3119 | &have_higher_than_11mbit, | |
3120 | &min_rate, &min_rate_index); | |
3121 | ||
3122 | /* | |
3123 | * This used to be a workaround for basic rates missing | |
3124 | * in the association response frame. Now that we no | |
3125 | * longer use the basic rates from there, it probably | |
3126 | * doesn't happen any more, but keep the workaround so | |
3127 | * in case some *other* APs are buggy in different ways | |
3128 | * we can connect -- with a warning. | |
3129 | */ | |
3130 | if (!basic_rates && min_rate_index >= 0) { | |
3131 | printk(KERN_DEBUG | |
3132 | "%s: No basic rates, using min rate instead.\n", | |
3133 | sdata->name); | |
3134 | basic_rates = BIT(min_rate_index); | |
3135 | } | |
3136 | ||
3137 | sta->sta.supp_rates[cbss->channel->band] = rates; | |
3138 | sdata->vif.bss_conf.basic_rates = basic_rates; | |
3139 | ||
3140 | /* cf. IEEE 802.11 9.2.12 */ | |
3141 | if (local->oper_channel->band == IEEE80211_BAND_2GHZ && | |
3142 | have_higher_than_11mbit) | |
3143 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
3144 | else | |
3145 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
3146 | ||
3147 | memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); | |
3148 | ||
3149 | /* tell driver about BSSID and basic rates */ | |
3150 | ieee80211_bss_info_change_notify(sdata, | |
3151 | BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES); | |
a1cf775d JB |
3152 | |
3153 | if (assoc) | |
3154 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); | |
3155 | ||
3156 | err = sta_info_insert(sta); | |
3157 | sta = NULL; | |
3158 | if (err) { | |
3159 | printk(KERN_DEBUG | |
3160 | "%s: failed to insert STA entry for the AP (error %d)\n", | |
3161 | sdata->name, err); | |
3162 | return err; | |
3163 | } | |
3164 | } else | |
b203ca39 | 3165 | WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); |
a1cf775d JB |
3166 | |
3167 | return 0; | |
3168 | } | |
3169 | ||
77fdaa12 JB |
3170 | /* config hooks */ |
3171 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, | |
3172 | struct cfg80211_auth_request *req) | |
9c6bd790 | 3173 | { |
66e67e41 JB |
3174 | struct ieee80211_local *local = sdata->local; |
3175 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3176 | struct ieee80211_mgd_auth_data *auth_data; | |
77fdaa12 | 3177 | u16 auth_alg; |
66e67e41 JB |
3178 | int err; |
3179 | ||
3180 | /* prepare auth data structure */ | |
9c6bd790 | 3181 | |
77fdaa12 JB |
3182 | switch (req->auth_type) { |
3183 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
3184 | auth_alg = WLAN_AUTH_OPEN; | |
3185 | break; | |
3186 | case NL80211_AUTHTYPE_SHARED_KEY: | |
66e67e41 | 3187 | if (IS_ERR(local->wep_tx_tfm)) |
9dca9c49 | 3188 | return -EOPNOTSUPP; |
77fdaa12 JB |
3189 | auth_alg = WLAN_AUTH_SHARED_KEY; |
3190 | break; | |
3191 | case NL80211_AUTHTYPE_FT: | |
3192 | auth_alg = WLAN_AUTH_FT; | |
3193 | break; | |
3194 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
3195 | auth_alg = WLAN_AUTH_LEAP; | |
3196 | break; | |
3197 | default: | |
3198 | return -EOPNOTSUPP; | |
60f8b39c | 3199 | } |
77fdaa12 | 3200 | |
66e67e41 JB |
3201 | auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL); |
3202 | if (!auth_data) | |
9c6bd790 | 3203 | return -ENOMEM; |
77fdaa12 | 3204 | |
66e67e41 | 3205 | auth_data->bss = req->bss; |
77fdaa12 JB |
3206 | |
3207 | if (req->ie && req->ie_len) { | |
66e67e41 JB |
3208 | memcpy(auth_data->ie, req->ie, req->ie_len); |
3209 | auth_data->ie_len = req->ie_len; | |
9c6bd790 | 3210 | } |
77fdaa12 | 3211 | |
fffd0934 | 3212 | if (req->key && req->key_len) { |
66e67e41 JB |
3213 | auth_data->key_len = req->key_len; |
3214 | auth_data->key_idx = req->key_idx; | |
3215 | memcpy(auth_data->key, req->key, req->key_len); | |
fffd0934 JB |
3216 | } |
3217 | ||
66e67e41 | 3218 | auth_data->algorithm = auth_alg; |
60f8b39c | 3219 | |
66e67e41 | 3220 | /* try to authenticate/probe */ |
2a33bee2 | 3221 | |
66e67e41 | 3222 | mutex_lock(&ifmgd->mtx); |
2a33bee2 | 3223 | |
66e67e41 JB |
3224 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || |
3225 | ifmgd->assoc_data) { | |
3226 | err = -EBUSY; | |
3227 | goto err_free; | |
2a33bee2 GE |
3228 | } |
3229 | ||
66e67e41 JB |
3230 | if (ifmgd->auth_data) |
3231 | ieee80211_destroy_auth_data(sdata, false); | |
2a33bee2 | 3232 | |
66e67e41 JB |
3233 | /* prep auth_data so we don't go into idle on disassoc */ |
3234 | ifmgd->auth_data = auth_data; | |
af6b6374 | 3235 | |
66e67e41 | 3236 | if (ifmgd->associated) |
37ad3888 | 3237 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
af6b6374 | 3238 | |
66e67e41 JB |
3239 | printk(KERN_DEBUG "%s: authenticate with %pM\n", |
3240 | sdata->name, req->bss->bssid); | |
e5b900d2 | 3241 | |
a1cf775d JB |
3242 | err = ieee80211_prep_connection(sdata, req->bss, false); |
3243 | if (err) | |
66e67e41 | 3244 | goto err_clear; |
af6b6374 | 3245 | |
66e67e41 JB |
3246 | err = ieee80211_probe_auth(sdata); |
3247 | if (err) { | |
66e67e41 JB |
3248 | sta_info_destroy_addr(sdata, req->bss->bssid); |
3249 | goto err_clear; | |
3250 | } | |
3251 | ||
3252 | /* hold our own reference */ | |
3253 | cfg80211_ref_bss(auth_data->bss); | |
3254 | err = 0; | |
3255 | goto out_unlock; | |
3256 | ||
3257 | err_clear: | |
3258 | ifmgd->auth_data = NULL; | |
3259 | err_free: | |
3260 | kfree(auth_data); | |
3261 | out_unlock: | |
3262 | mutex_unlock(&ifmgd->mtx); | |
b2abb6e2 | 3263 | |
66e67e41 | 3264 | return err; |
af6b6374 JB |
3265 | } |
3266 | ||
77fdaa12 JB |
3267 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
3268 | struct cfg80211_assoc_request *req) | |
f0706e82 | 3269 | { |
66e67e41 | 3270 | struct ieee80211_local *local = sdata->local; |
77fdaa12 | 3271 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 3272 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
66e67e41 | 3273 | struct ieee80211_mgd_assoc_data *assoc_data; |
4e74bfdb | 3274 | struct ieee80211_supported_band *sband; |
66e67e41 | 3275 | const u8 *ssidie; |
2a33bee2 | 3276 | int i, err; |
f0706e82 | 3277 | |
66e67e41 JB |
3278 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
3279 | if (!ssidie) | |
3280 | return -EINVAL; | |
3281 | ||
3282 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); | |
3283 | if (!assoc_data) | |
3284 | return -ENOMEM; | |
3285 | ||
77fdaa12 | 3286 | mutex_lock(&ifmgd->mtx); |
9c87ba67 | 3287 | |
66e67e41 | 3288 | if (ifmgd->associated) |
37ad3888 | 3289 | ieee80211_set_disassoc(sdata, 0, 0, false, NULL); |
66e67e41 JB |
3290 | |
3291 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { | |
3292 | err = -EBUSY; | |
3293 | goto err_free; | |
af6b6374 | 3294 | } |
77fdaa12 | 3295 | |
66e67e41 JB |
3296 | if (ifmgd->assoc_data) { |
3297 | err = -EBUSY; | |
3298 | goto err_free; | |
3299 | } | |
77fdaa12 | 3300 | |
66e67e41 JB |
3301 | if (ifmgd->auth_data) { |
3302 | bool match; | |
3303 | ||
3304 | /* keep sta info, bssid if matching */ | |
b203ca39 | 3305 | match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); |
66e67e41 | 3306 | ieee80211_destroy_auth_data(sdata, match); |
2a33bee2 GE |
3307 | } |
3308 | ||
66e67e41 JB |
3309 | /* prepare assoc data */ |
3310 | ||
77fdaa12 | 3311 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
375177bf | 3312 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
77fdaa12 | 3313 | |
d8ec4433 JO |
3314 | ifmgd->beacon_crc_valid = false; |
3315 | ||
de5036aa JB |
3316 | /* |
3317 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
3318 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
3319 | * ciphers is configured as pairwise. | |
3320 | * We can set this to true for non-11n hardware, that'll be checked | |
3321 | * separately along with the peer capabilities. | |
3322 | */ | |
77fdaa12 JB |
3323 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
3324 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
3325 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
3326 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
3327 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
3328 | ||
ef96a842 BG |
3329 | if (req->flags & ASSOC_REQ_DISABLE_HT) |
3330 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
3331 | ||
4e74bfdb JB |
3332 | /* Also disable HT if we don't support it or the AP doesn't use WMM */ |
3333 | sband = local->hw.wiphy->bands[req->bss->channel->band]; | |
3334 | if (!sband->ht_cap.ht_supported || | |
32c5057b | 3335 | local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) |
4e74bfdb JB |
3336 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
3337 | ||
ef96a842 BG |
3338 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); |
3339 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, | |
3340 | sizeof(ifmgd->ht_capa_mask)); | |
3341 | ||
77fdaa12 | 3342 | if (req->ie && req->ie_len) { |
66e67e41 JB |
3343 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
3344 | assoc_data->ie_len = req->ie_len; | |
3345 | } | |
f679f65d | 3346 | |
66e67e41 | 3347 | assoc_data->bss = req->bss; |
f679f65d | 3348 | |
af6b6374 JB |
3349 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
3350 | if (ifmgd->powersave) | |
3351 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
3352 | else | |
3353 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
3354 | } else | |
3355 | ifmgd->ap_smps = ifmgd->req_smps; | |
3356 | ||
66e67e41 | 3357 | assoc_data->capability = req->bss->capability; |
32c5057b JB |
3358 | assoc_data->wmm = bss->wmm_used && |
3359 | (local->hw.queues >= IEEE80211_NUM_ACS); | |
66e67e41 JB |
3360 | assoc_data->supp_rates = bss->supp_rates; |
3361 | assoc_data->supp_rates_len = bss->supp_rates_len; | |
074d46d1 JB |
3362 | assoc_data->ht_operation_ie = |
3363 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); | |
63f170e0 | 3364 | |
ab13315a KV |
3365 | if (bss->wmm_used && bss->uapsd_supported && |
3366 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
76f0303d | 3367 | assoc_data->uapsd = true; |
ab13315a KV |
3368 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
3369 | } else { | |
76f0303d | 3370 | assoc_data->uapsd = false; |
ab13315a KV |
3371 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
3372 | } | |
3373 | ||
66e67e41 JB |
3374 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); |
3375 | assoc_data->ssid_len = ssidie[1]; | |
63f170e0 | 3376 | |
77fdaa12 | 3377 | if (req->prev_bssid) |
66e67e41 | 3378 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 JB |
3379 | |
3380 | if (req->use_mfp) { | |
3381 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
3382 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
3383 | } else { | |
3384 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
3385 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
3386 | } | |
3387 | ||
3388 | if (req->crypto.control_port) | |
3389 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
3390 | else | |
3391 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
3392 | ||
a621fa4d JB |
3393 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
3394 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; | |
3395 | ||
66e67e41 JB |
3396 | /* kick off associate process */ |
3397 | ||
3398 | ifmgd->assoc_data = assoc_data; | |
3399 | ||
a1cf775d JB |
3400 | err = ieee80211_prep_connection(sdata, req->bss, true); |
3401 | if (err) | |
3402 | goto err_clear; | |
66e67e41 JB |
3403 | |
3404 | if (!bss->dtim_period && | |
3405 | sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) { | |
3406 | /* | |
3407 | * Wait up to one beacon interval ... | |
3408 | * should this be more if we miss one? | |
3409 | */ | |
3410 | printk(KERN_DEBUG "%s: waiting for beacon from %pM\n", | |
3411 | sdata->name, ifmgd->bssid); | |
3f9768a5 | 3412 | assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); |
66e67e41 JB |
3413 | } else { |
3414 | assoc_data->have_beacon = true; | |
3415 | assoc_data->sent_assoc = false; | |
3416 | assoc_data->timeout = jiffies; | |
3417 | } | |
3418 | run_again(ifmgd, assoc_data->timeout); | |
3419 | ||
fcff4f10 PS |
3420 | if (bss->corrupt_data) { |
3421 | char *corrupt_type = "data"; | |
3422 | if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { | |
3423 | if (bss->corrupt_data & | |
3424 | IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
3425 | corrupt_type = "beacon and probe response"; | |
3426 | else | |
3427 | corrupt_type = "beacon"; | |
3428 | } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) | |
3429 | corrupt_type = "probe response"; | |
3430 | printk(KERN_DEBUG "%s: associating with AP with corrupt %s\n", | |
3431 | sdata->name, corrupt_type); | |
3432 | } | |
3433 | ||
66e67e41 JB |
3434 | err = 0; |
3435 | goto out; | |
3436 | err_clear: | |
3437 | ifmgd->assoc_data = NULL; | |
3438 | err_free: | |
3439 | kfree(assoc_data); | |
3440 | out: | |
3441 | mutex_unlock(&ifmgd->mtx); | |
3442 | ||
3443 | return err; | |
f0706e82 JB |
3444 | } |
3445 | ||
77fdaa12 | 3446 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 3447 | struct cfg80211_deauth_request *req) |
f0706e82 | 3448 | { |
46900298 | 3449 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
5fef7dbc | 3450 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
f0706e82 | 3451 | |
77fdaa12 JB |
3452 | mutex_lock(&ifmgd->mtx); |
3453 | ||
37ad3888 | 3454 | if (ifmgd->auth_data) { |
66e67e41 | 3455 | ieee80211_destroy_auth_data(sdata, false); |
a58ce43f | 3456 | mutex_unlock(&ifmgd->mtx); |
66e67e41 | 3457 | return 0; |
af6b6374 | 3458 | } |
77fdaa12 | 3459 | |
37ad3888 JB |
3460 | printk(KERN_DEBUG |
3461 | "%s: deauthenticating from %pM by local choice (reason=%d)\n", | |
95de817b | 3462 | sdata->name, req->bssid, req->reason_code); |
0ff71613 | 3463 | |
37ad3888 | 3464 | if (ifmgd->associated && |
b203ca39 | 3465 | ether_addr_equal(ifmgd->associated->bssid, req->bssid)) |
37ad3888 | 3466 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, |
5fef7dbc | 3467 | req->reason_code, true, frame_buf); |
37ad3888 JB |
3468 | else |
3469 | ieee80211_send_deauth_disassoc(sdata, req->bssid, | |
3470 | IEEE80211_STYPE_DEAUTH, | |
3471 | req->reason_code, true, | |
3472 | frame_buf); | |
3473 | mutex_unlock(&ifmgd->mtx); | |
3474 | ||
5fef7dbc | 3475 | __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
f0706e82 | 3476 | |
7da7cc1d | 3477 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3478 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3479 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3480 | |
f0706e82 JB |
3481 | return 0; |
3482 | } | |
84363e6e | 3483 | |
77fdaa12 | 3484 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
63c9c5e7 | 3485 | struct cfg80211_disassoc_request *req) |
9c6bd790 | 3486 | { |
77fdaa12 | 3487 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
e69e95db | 3488 | u8 bssid[ETH_ALEN]; |
5fef7dbc | 3489 | u8 frame_buf[DEAUTH_DISASSOC_LEN]; |
9c6bd790 | 3490 | |
77fdaa12 | 3491 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 3492 | |
8d8b261a JB |
3493 | /* |
3494 | * cfg80211 should catch this ... but it's racy since | |
3495 | * we can receive a disassoc frame, process it, hand it | |
3496 | * to cfg80211 while that's in a locked section already | |
3497 | * trying to tell us that the user wants to disconnect. | |
3498 | */ | |
0c1ad2ca | 3499 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
3500 | mutex_unlock(&ifmgd->mtx); |
3501 | return -ENOLINK; | |
3502 | } | |
3503 | ||
0ff71613 | 3504 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 3505 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 3506 | |
e69e95db | 3507 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
37ad3888 JB |
3508 | ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, |
3509 | req->reason_code, !req->local_state_change, | |
3510 | frame_buf); | |
77fdaa12 | 3511 | mutex_unlock(&ifmgd->mtx); |
10f644a4 | 3512 | |
5fef7dbc | 3513 | __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN); |
bc83b681 | 3514 | |
7da7cc1d | 3515 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3516 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3517 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3518 | |
10f644a4 JB |
3519 | return 0; |
3520 | } | |
026331c4 | 3521 | |
afa762f6 | 3522 | void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) |
54e4ffb2 JB |
3523 | { |
3524 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3525 | ||
3526 | mutex_lock(&ifmgd->mtx); | |
3527 | if (ifmgd->assoc_data) | |
3528 | ieee80211_destroy_assoc_data(sdata, false); | |
3529 | if (ifmgd->auth_data) | |
3530 | ieee80211_destroy_auth_data(sdata, false); | |
3531 | del_timer_sync(&ifmgd->timer); | |
3532 | mutex_unlock(&ifmgd->mtx); | |
3533 | } | |
3534 | ||
a97c13c3 JO |
3535 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
3536 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
3537 | gfp_t gfp) | |
3538 | { | |
3539 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3540 | ||
b5878a2d JB |
3541 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
3542 | ||
a97c13c3 JO |
3543 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
3544 | } | |
3545 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); | |
1d34d108 EP |
3546 | |
3547 | unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif) | |
3548 | { | |
3549 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3550 | return sdata->dev->operstate; | |
3551 | } | |
3552 | EXPORT_SYMBOL(ieee80211_get_operstate); |