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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> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
f0706e82 | 23 | #include <net/mac80211.h> |
472dbc45 | 24 | #include <asm/unaligned.h> |
60f8b39c | 25 | |
f0706e82 | 26 | #include "ieee80211_i.h" |
24487981 | 27 | #include "driver-ops.h" |
2c8dccc7 JB |
28 | #include "rate.h" |
29 | #include "led.h" | |
f0706e82 | 30 | |
a43abf29 | 31 | #define IEEE80211_MAX_PROBE_TRIES 5 |
b291ba11 JB |
32 | |
33 | /* | |
34 | * beacon loss detection timeout | |
35 | * XXX: should depend on beacon interval | |
36 | */ | |
37 | #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) | |
38 | /* | |
39 | * Time the connection can be idle before we probe | |
40 | * it to see if we can still talk to the AP. | |
41 | */ | |
d1c5091f | 42 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
43 | /* |
44 | * Time we wait for a probe response after sending | |
45 | * a probe request because of beacon loss or for | |
46 | * checking the connection still works. | |
47 | */ | |
d1c5091f | 48 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
f0706e82 | 49 | |
17e4ec14 JM |
50 | /* |
51 | * Weight given to the latest Beacon frame when calculating average signal | |
52 | * strength for Beacon frames received in the current BSS. This must be | |
53 | * between 1 and 15. | |
54 | */ | |
55 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
56 | ||
5bb644a0 JB |
57 | #define TMR_RUNNING_TIMER 0 |
58 | #define TMR_RUNNING_CHANSW 1 | |
59 | ||
77fdaa12 JB |
60 | /* |
61 | * All cfg80211 functions have to be called outside a locked | |
62 | * section so that they can acquire a lock themselves... This | |
63 | * is much simpler than queuing up things in cfg80211, but we | |
64 | * do need some indirection for that here. | |
65 | */ | |
66 | enum rx_mgmt_action { | |
67 | /* no action required */ | |
68 | RX_MGMT_NONE, | |
69 | ||
70 | /* caller must call cfg80211_send_rx_auth() */ | |
71 | RX_MGMT_CFG80211_AUTH, | |
72 | ||
73 | /* caller must call cfg80211_send_rx_assoc() */ | |
74 | RX_MGMT_CFG80211_ASSOC, | |
75 | ||
76 | /* caller must call cfg80211_send_deauth() */ | |
77 | RX_MGMT_CFG80211_DEAUTH, | |
78 | ||
79 | /* caller must call cfg80211_send_disassoc() */ | |
80 | RX_MGMT_CFG80211_DISASSOC, | |
81 | ||
5d1ec85f JB |
82 | /* caller must tell cfg80211 about internal error */ |
83 | RX_MGMT_CFG80211_ASSOC_ERROR, | |
77fdaa12 JB |
84 | }; |
85 | ||
5484e237 | 86 | /* utils */ |
77fdaa12 JB |
87 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
88 | { | |
89 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); | |
90 | } | |
91 | ||
ca386f31 JB |
92 | /* |
93 | * We can have multiple work items (and connection probing) | |
94 | * scheduling this timer, but we need to take care to only | |
95 | * reschedule it when it should fire _earlier_ than it was | |
96 | * asked for before, or if it's not pending right now. This | |
97 | * function ensures that. Note that it then is required to | |
98 | * run this function for all timeouts after the first one | |
99 | * has happened -- the work that runs from this timer will | |
100 | * do that. | |
101 | */ | |
102 | static void run_again(struct ieee80211_if_managed *ifmgd, | |
103 | unsigned long timeout) | |
104 | { | |
105 | ASSERT_MGD_MTX(ifmgd); | |
106 | ||
107 | if (!timer_pending(&ifmgd->timer) || | |
108 | time_before(timeout, ifmgd->timer.expires)) | |
109 | mod_timer(&ifmgd->timer, timeout); | |
110 | } | |
111 | ||
b291ba11 JB |
112 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
113 | { | |
114 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) | |
115 | return; | |
116 | ||
117 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
118 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); | |
119 | } | |
120 | ||
5484e237 | 121 | static int ecw2cw(int ecw) |
60f8b39c | 122 | { |
5484e237 | 123 | return (1 << ecw) - 1; |
60f8b39c JB |
124 | } |
125 | ||
d5522e03 JB |
126 | /* |
127 | * ieee80211_enable_ht should be called only after the operating band | |
128 | * has been determined as ht configuration depends on the hw's | |
129 | * HT abilities for a specific band. | |
130 | */ | |
131 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
132 | struct ieee80211_ht_info *hti, | |
77fdaa12 | 133 | const u8 *bssid, u16 ap_ht_cap_flags) |
d5522e03 JB |
134 | { |
135 | struct ieee80211_local *local = sdata->local; | |
136 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
137 | struct sta_info *sta; |
138 | u32 changed = 0; | |
9ed6bcce | 139 | u16 ht_opmode; |
0aaffa9b JB |
140 | bool enable_ht = true; |
141 | enum nl80211_channel_type prev_chantype; | |
d5522e03 JB |
142 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
143 | ||
144 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
145 | ||
0aaffa9b JB |
146 | prev_chantype = sdata->vif.bss_conf.channel_type; |
147 | ||
d5522e03 JB |
148 | /* HT is not supported */ |
149 | if (!sband->ht_cap.ht_supported) | |
150 | enable_ht = false; | |
151 | ||
152 | /* check that channel matches the right operating channel */ | |
153 | if (local->hw.conf.channel->center_freq != | |
154 | ieee80211_channel_to_frequency(hti->control_chan)) | |
155 | enable_ht = false; | |
156 | ||
157 | if (enable_ht) { | |
158 | channel_type = NL80211_CHAN_HT20; | |
159 | ||
160 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
161 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
162 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
163 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
164 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
165 | if (!(local->hw.conf.channel->flags & |
166 | IEEE80211_CHAN_NO_HT40PLUS)) | |
167 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
168 | break; |
169 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
170 | if (!(local->hw.conf.channel->flags & |
171 | IEEE80211_CHAN_NO_HT40MINUS)) | |
172 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
173 | break; |
174 | } | |
175 | } | |
176 | } | |
177 | ||
fe6f212c RC |
178 | if (local->tmp_channel) |
179 | local->tmp_channel_type = channel_type; | |
d5522e03 | 180 | |
0aaffa9b JB |
181 | if (!ieee80211_set_channel_type(local, sdata, channel_type)) { |
182 | /* can only fail due to HT40+/- mismatch */ | |
183 | channel_type = NL80211_CHAN_HT20; | |
184 | WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type)); | |
185 | } | |
d5522e03 | 186 | |
0aaffa9b JB |
187 | /* channel_type change automatically detected */ |
188 | ieee80211_hw_config(local, 0); | |
d5522e03 | 189 | |
0aaffa9b | 190 | if (prev_chantype != channel_type) { |
d5522e03 | 191 | rcu_read_lock(); |
abe60632 | 192 | sta = sta_info_get(sdata, bssid); |
d5522e03 JB |
193 | if (sta) |
194 | rate_control_rate_update(local, sband, sta, | |
4fa00437 | 195 | IEEE80211_RC_HT_CHANGED, |
0aaffa9b | 196 | channel_type); |
d5522e03 | 197 | rcu_read_unlock(); |
0aaffa9b | 198 | } |
d5522e03 | 199 | |
9ed6bcce | 200 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
201 | |
202 | /* if bss configuration changed store the new one */ | |
0aaffa9b JB |
203 | if (sdata->ht_opmode_valid != enable_ht || |
204 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode || | |
205 | prev_chantype != channel_type) { | |
d5522e03 | 206 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 207 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
0aaffa9b | 208 | sdata->ht_opmode_valid = enable_ht; |
d5522e03 JB |
209 | } |
210 | ||
211 | return changed; | |
212 | } | |
213 | ||
9c6bd790 JB |
214 | /* frame sending functions */ |
215 | ||
ef422bc0 | 216 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd | 217 | const u8 *bssid, u16 stype, u16 reason, |
d5cdfacb | 218 | void *cookie, bool send_frame) |
9ac19a90 JB |
219 | { |
220 | struct ieee80211_local *local = sdata->local; | |
46900298 | 221 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
222 | struct sk_buff *skb; |
223 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 224 | |
65fc73ac | 225 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 226 | if (!skb) { |
ef422bc0 | 227 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
47846c9b | 228 | "deauth/disassoc frame\n", sdata->name); |
9ac19a90 JB |
229 | return; |
230 | } | |
231 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
232 | ||
233 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
234 | memset(mgmt, 0, 24); | |
77fdaa12 | 235 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 236 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 237 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 238 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 239 | skb_put(skb, 2); |
ef422bc0 | 240 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
241 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
242 | ||
53b46b84 | 243 | if (stype == IEEE80211_STYPE_DEAUTH) |
ce470613 HS |
244 | if (cookie) |
245 | __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
246 | else | |
247 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
53b46b84 | 248 | else |
ce470613 HS |
249 | if (cookie) |
250 | __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
251 | else | |
252 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
62ae67be JB |
253 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
254 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
d5cdfacb JM |
255 | |
256 | if (send_frame) | |
257 | ieee80211_tx_skb(sdata, skb); | |
258 | else | |
259 | kfree_skb(skb); | |
9ac19a90 JB |
260 | } |
261 | ||
572e0012 KV |
262 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
263 | struct ieee80211_sub_if_data *sdata) | |
264 | { | |
572e0012 KV |
265 | struct ieee80211_pspoll *pspoll; |
266 | struct sk_buff *skb; | |
572e0012 | 267 | |
d8cd189e KV |
268 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
269 | if (!skb) | |
572e0012 | 270 | return; |
572e0012 | 271 | |
d8cd189e KV |
272 | pspoll = (struct ieee80211_pspoll *) skb->data; |
273 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 274 | |
62ae67be JB |
275 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
276 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
277 | } |
278 | ||
965bedad JB |
279 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
280 | struct ieee80211_sub_if_data *sdata, | |
281 | int powersave) | |
282 | { | |
283 | struct sk_buff *skb; | |
d8cd189e | 284 | struct ieee80211_hdr_3addr *nullfunc; |
965bedad | 285 | |
d8cd189e KV |
286 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
287 | if (!skb) | |
965bedad | 288 | return; |
965bedad | 289 | |
d8cd189e | 290 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 291 | if (powersave) |
d8cd189e | 292 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 293 | |
62ae67be JB |
294 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
295 | ieee80211_tx_skb(sdata, skb); | |
965bedad JB |
296 | } |
297 | ||
d524215f FF |
298 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
299 | struct ieee80211_sub_if_data *sdata) | |
300 | { | |
301 | struct sk_buff *skb; | |
302 | struct ieee80211_hdr *nullfunc; | |
303 | __le16 fc; | |
304 | ||
305 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
306 | return; | |
307 | ||
308 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
309 | if (!skb) { | |
310 | printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr " | |
311 | "nullfunc frame\n", sdata->name); | |
312 | return; | |
313 | } | |
314 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
315 | ||
316 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
317 | memset(nullfunc, 0, 30); | |
318 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
319 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
320 | nullfunc->frame_control = fc; | |
321 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
322 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
323 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
324 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
325 | ||
326 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
327 | ieee80211_tx_skb(sdata, skb); | |
328 | } | |
329 | ||
cc32abd4 JB |
330 | /* spectrum management related things */ |
331 | static void ieee80211_chswitch_work(struct work_struct *work) | |
332 | { | |
333 | struct ieee80211_sub_if_data *sdata = | |
334 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
335 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
336 | ||
9607e6b6 | 337 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
338 | return; |
339 | ||
77fdaa12 JB |
340 | mutex_lock(&ifmgd->mtx); |
341 | if (!ifmgd->associated) | |
342 | goto out; | |
cc32abd4 JB |
343 | |
344 | sdata->local->oper_channel = sdata->local->csa_channel; | |
5ce6e438 JB |
345 | if (!sdata->local->ops->channel_switch) { |
346 | /* call "hw_config" only if doing sw channel switch */ | |
347 | ieee80211_hw_config(sdata->local, | |
348 | IEEE80211_CONF_CHANGE_CHANNEL); | |
349 | } | |
77fdaa12 | 350 | |
cc32abd4 | 351 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 352 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 353 | |
cc32abd4 JB |
354 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
355 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
356 | out: |
357 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
358 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
359 | } |
360 | ||
5ce6e438 JB |
361 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
362 | { | |
363 | struct ieee80211_sub_if_data *sdata; | |
364 | struct ieee80211_if_managed *ifmgd; | |
365 | ||
366 | sdata = vif_to_sdata(vif); | |
367 | ifmgd = &sdata->u.mgd; | |
368 | ||
369 | trace_api_chswitch_done(sdata, success); | |
370 | if (!success) { | |
371 | /* | |
372 | * If the channel switch was not successful, stay | |
373 | * around on the old channel. We currently lack | |
374 | * good handling of this situation, possibly we | |
375 | * should just drop the association. | |
376 | */ | |
377 | sdata->local->csa_channel = sdata->local->oper_channel; | |
378 | } | |
379 | ||
380 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
381 | } | |
382 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
383 | ||
cc32abd4 JB |
384 | static void ieee80211_chswitch_timer(unsigned long data) |
385 | { | |
386 | struct ieee80211_sub_if_data *sdata = | |
387 | (struct ieee80211_sub_if_data *) data; | |
388 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
389 | ||
5bb644a0 JB |
390 | if (sdata->local->quiescing) { |
391 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
392 | return; | |
393 | } | |
394 | ||
42935eca | 395 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
396 | } |
397 | ||
398 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
399 | struct ieee80211_channel_sw_ie *sw_elem, | |
5ce6e438 JB |
400 | struct ieee80211_bss *bss, |
401 | u64 timestamp) | |
cc32abd4 | 402 | { |
0c1ad2ca JB |
403 | struct cfg80211_bss *cbss = |
404 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
405 | struct ieee80211_channel *new_ch; |
406 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
407 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); | |
408 | ||
77fdaa12 JB |
409 | ASSERT_MGD_MTX(ifmgd); |
410 | ||
411 | if (!ifmgd->associated) | |
cc32abd4 JB |
412 | return; |
413 | ||
fbe9c429 | 414 | if (sdata->local->scanning) |
cc32abd4 JB |
415 | return; |
416 | ||
417 | /* Disregard subsequent beacons if we are already running a timer | |
418 | processing a CSA */ | |
419 | ||
420 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
421 | return; | |
422 | ||
423 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
424 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
425 | return; | |
426 | ||
427 | sdata->local->csa_channel = new_ch; | |
428 | ||
5ce6e438 JB |
429 | if (sdata->local->ops->channel_switch) { |
430 | /* use driver's channel switch callback */ | |
431 | struct ieee80211_channel_switch ch_switch; | |
432 | memset(&ch_switch, 0, sizeof(ch_switch)); | |
433 | ch_switch.timestamp = timestamp; | |
434 | if (sw_elem->mode) { | |
435 | ch_switch.block_tx = true; | |
436 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
437 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
438 | } | |
439 | ch_switch.channel = new_ch; | |
440 | ch_switch.count = sw_elem->count; | |
441 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
442 | drv_channel_switch(sdata->local, &ch_switch); | |
443 | return; | |
444 | } | |
445 | ||
446 | /* channel switch handled in software */ | |
cc32abd4 | 447 | if (sw_elem->count <= 1) { |
42935eca | 448 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 | 449 | } else { |
9feaddc7 WYG |
450 | if (sw_elem->mode) |
451 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
cc32abd4 JB |
452 | IEEE80211_QUEUE_STOP_REASON_CSA); |
453 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
454 | mod_timer(&ifmgd->chswitch_timer, | |
455 | jiffies + | |
456 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 457 | cbss->beacon_interval)); |
cc32abd4 JB |
458 | } |
459 | } | |
460 | ||
461 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
462 | u16 capab_info, u8 *pwr_constr_elem, | |
463 | u8 pwr_constr_elem_len) | |
464 | { | |
465 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
466 | ||
467 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
468 | return; | |
469 | ||
470 | /* Power constraint IE length should be 1 octet */ | |
471 | if (pwr_constr_elem_len != 1) | |
472 | return; | |
473 | ||
474 | if ((*pwr_constr_elem <= conf->channel->max_power) && | |
475 | (*pwr_constr_elem != sdata->local->power_constr_level)) { | |
476 | sdata->local->power_constr_level = *pwr_constr_elem; | |
477 | ieee80211_hw_config(sdata->local, 0); | |
478 | } | |
479 | } | |
480 | ||
965bedad JB |
481 | /* powersave */ |
482 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
483 | struct ieee80211_sub_if_data *sdata) | |
484 | { | |
485 | struct ieee80211_conf *conf = &local->hw.conf; | |
486 | ||
d5edaedc JB |
487 | /* |
488 | * If we are scanning right now then the parameters will | |
489 | * take effect when scan finishes. | |
490 | */ | |
fbe9c429 | 491 | if (local->scanning) |
d5edaedc JB |
492 | return; |
493 | ||
965bedad JB |
494 | if (conf->dynamic_ps_timeout > 0 && |
495 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
496 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
497 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
498 | } else { | |
499 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
500 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf | 501 | |
2a13052f JO |
502 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
503 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
504 | return; | |
505 | ||
506 | conf->flags |= IEEE80211_CONF_PS; | |
507 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
965bedad JB |
508 | } |
509 | } | |
510 | ||
511 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
512 | { | |
513 | struct ieee80211_conf *conf = &local->hw.conf; | |
514 | ||
515 | if (local->ps_sdata) { | |
965bedad JB |
516 | ieee80211_enable_ps(local, local->ps_sdata); |
517 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
518 | conf->flags &= ~IEEE80211_CONF_PS; | |
519 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
520 | del_timer_sync(&local->dynamic_ps_timer); | |
521 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
522 | } | |
523 | } | |
524 | ||
525 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 526 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
527 | { |
528 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
529 | int count = 0; | |
195e294d | 530 | int timeout; |
965bedad JB |
531 | |
532 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
533 | local->ps_sdata = NULL; | |
534 | return; | |
535 | } | |
536 | ||
af6b6374 JB |
537 | if (!list_empty(&local->work_list)) { |
538 | local->ps_sdata = NULL; | |
539 | goto change; | |
540 | } | |
541 | ||
965bedad | 542 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 543 | if (!ieee80211_sdata_running(sdata)) |
965bedad JB |
544 | continue; |
545 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
546 | continue; | |
547 | found = sdata; | |
548 | count++; | |
549 | } | |
550 | ||
43f78531 | 551 | if (count == 1 && found->u.mgd.powersave && |
af6b6374 | 552 | found->u.mgd.associated && |
56007a02 | 553 | found->u.mgd.associated->beacon_ies && |
b291ba11 JB |
554 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
555 | IEEE80211_STA_CONNECTION_POLL))) { | |
10f644a4 JB |
556 | s32 beaconint_us; |
557 | ||
558 | if (latency < 0) | |
ed77134b | 559 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
10f644a4 JB |
560 | |
561 | beaconint_us = ieee80211_tu_to_usec( | |
562 | found->vif.bss_conf.beacon_int); | |
563 | ||
195e294d JO |
564 | timeout = local->hw.conf.dynamic_ps_forced_timeout; |
565 | if (timeout < 0) { | |
566 | /* | |
567 | * The 2 second value is there for compatibility until | |
568 | * the PM_QOS_NETWORK_LATENCY is configured with real | |
569 | * values. | |
570 | */ | |
571 | if (latency == 2000000000) | |
572 | timeout = 100; | |
573 | else if (latency <= 50000) | |
574 | timeout = 300; | |
575 | else if (latency <= 100000) | |
576 | timeout = 100; | |
577 | else if (latency <= 500000) | |
578 | timeout = 50; | |
579 | else | |
580 | timeout = 0; | |
581 | } | |
582 | local->hw.conf.dynamic_ps_timeout = timeout; | |
583 | ||
04fe2037 | 584 | if (beaconint_us > latency) { |
10f644a4 | 585 | local->ps_sdata = NULL; |
04fe2037 | 586 | } else { |
56007a02 | 587 | struct ieee80211_bss *bss; |
04fe2037 | 588 | int maxslp = 1; |
56007a02 | 589 | u8 dtimper; |
04fe2037 | 590 | |
56007a02 JB |
591 | bss = (void *)found->u.mgd.associated->priv; |
592 | dtimper = bss->dtim_period; | |
593 | ||
594 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
595 | if (!dtimper) | |
596 | dtimper = 1; | |
597 | else if (dtimper > 1) | |
04fe2037 JB |
598 | maxslp = min_t(int, dtimper, |
599 | latency / beaconint_us); | |
600 | ||
9ccebe61 | 601 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 602 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 603 | local->ps_sdata = found; |
04fe2037 | 604 | } |
10f644a4 | 605 | } else { |
965bedad | 606 | local->ps_sdata = NULL; |
10f644a4 | 607 | } |
965bedad | 608 | |
af6b6374 | 609 | change: |
965bedad JB |
610 | ieee80211_change_ps(local); |
611 | } | |
612 | ||
613 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
614 | { | |
615 | struct ieee80211_local *local = | |
616 | container_of(work, struct ieee80211_local, | |
617 | dynamic_ps_disable_work); | |
618 | ||
619 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
620 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
621 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
622 | } | |
623 | ||
624 | ieee80211_wake_queues_by_reason(&local->hw, | |
625 | IEEE80211_QUEUE_STOP_REASON_PS); | |
626 | } | |
627 | ||
628 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
629 | { | |
630 | struct ieee80211_local *local = | |
631 | container_of(work, struct ieee80211_local, | |
632 | dynamic_ps_enable_work); | |
633 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
375177bf | 634 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad JB |
635 | |
636 | /* can only happen when PS was just disabled anyway */ | |
637 | if (!sdata) | |
638 | return; | |
639 | ||
640 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
641 | return; | |
642 | ||
375177bf VN |
643 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
644 | (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) | |
965bedad JB |
645 | ieee80211_send_nullfunc(local, sdata, 1); |
646 | ||
2a13052f JO |
647 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
648 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
375177bf VN |
649 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
650 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
651 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
652 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
653 | } | |
965bedad JB |
654 | } |
655 | ||
656 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
657 | { | |
658 | struct ieee80211_local *local = (void *) data; | |
659 | ||
78f1a8b7 | 660 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
661 | return; |
662 | ||
42935eca | 663 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
664 | } |
665 | ||
60f8b39c | 666 | /* MLME */ |
f698d856 | 667 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 668 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
669 | u8 *wmm_param, size_t wmm_param_len) |
670 | { | |
f0706e82 JB |
671 | struct ieee80211_tx_queue_params params; |
672 | size_t left; | |
673 | int count; | |
ab13315a | 674 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 675 | |
e1b3ec1a SG |
676 | if (!local->ops->conf_tx) |
677 | return; | |
678 | ||
af6b6374 | 679 | if (local->hw.queues < 4) |
3434fbd3 JB |
680 | return; |
681 | ||
682 | if (!wmm_param) | |
683 | return; | |
684 | ||
f0706e82 JB |
685 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
686 | return; | |
ab13315a KV |
687 | |
688 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
50ae0cf1 | 689 | uapsd_queues = local->uapsd_queues; |
ab13315a | 690 | |
f0706e82 | 691 | count = wmm_param[6] & 0x0f; |
46900298 | 692 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 693 | return; |
46900298 | 694 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
695 | |
696 | pos = wmm_param + 8; | |
697 | left = wmm_param_len - 8; | |
698 | ||
699 | memset(¶ms, 0, sizeof(params)); | |
700 | ||
f0706e82 JB |
701 | local->wmm_acm = 0; |
702 | for (; left >= 4; left -= 4, pos += 4) { | |
703 | int aci = (pos[0] >> 5) & 0x03; | |
704 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 705 | bool uapsd = false; |
f0706e82 JB |
706 | int queue; |
707 | ||
708 | switch (aci) { | |
0eeb59fe | 709 | case 1: /* AC_BK */ |
e100bb64 | 710 | queue = 3; |
988c0f72 | 711 | if (acm) |
0eeb59fe | 712 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
713 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
714 | uapsd = true; | |
f0706e82 | 715 | break; |
0eeb59fe | 716 | case 2: /* AC_VI */ |
e100bb64 | 717 | queue = 1; |
988c0f72 | 718 | if (acm) |
0eeb59fe | 719 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
720 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
721 | uapsd = true; | |
f0706e82 | 722 | break; |
0eeb59fe | 723 | case 3: /* AC_VO */ |
e100bb64 | 724 | queue = 0; |
988c0f72 | 725 | if (acm) |
0eeb59fe | 726 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
727 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
728 | uapsd = true; | |
f0706e82 | 729 | break; |
0eeb59fe | 730 | case 0: /* AC_BE */ |
f0706e82 | 731 | default: |
e100bb64 | 732 | queue = 2; |
988c0f72 | 733 | if (acm) |
0eeb59fe | 734 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
735 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
736 | uapsd = true; | |
f0706e82 JB |
737 | break; |
738 | } | |
739 | ||
740 | params.aifs = pos[0] & 0x0f; | |
741 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
742 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 743 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
744 | params.uapsd = uapsd; |
745 | ||
f4ea83dd | 746 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 747 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
ab13315a | 748 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
0bffe40f | 749 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
ab13315a KV |
750 | params.aifs, params.cw_min, params.cw_max, params.txop, |
751 | params.uapsd); | |
3330d7be | 752 | #endif |
e1b3ec1a | 753 | if (drv_conf_tx(local, queue, ¶ms)) |
f0706e82 | 754 | printk(KERN_DEBUG "%s: failed to set TX queue " |
0bffe40f JB |
755 | "parameters for queue %d\n", |
756 | wiphy_name(local->hw.wiphy), queue); | |
f0706e82 | 757 | } |
e1b3ec1a SG |
758 | |
759 | /* enable WMM or activate new settings */ | |
760 | local->hw.conf.flags |= IEEE80211_CONF_QOS; | |
761 | drv_config(local, IEEE80211_CONF_CHANGE_QOS); | |
f0706e82 JB |
762 | } |
763 | ||
7a5158ef JB |
764 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
765 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 766 | { |
bda3933a | 767 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 768 | u32 changed = 0; |
7a5158ef JB |
769 | bool use_protection; |
770 | bool use_short_preamble; | |
771 | bool use_short_slot; | |
772 | ||
773 | if (erp_valid) { | |
774 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
775 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
776 | } else { | |
777 | use_protection = false; | |
778 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
779 | } | |
780 | ||
781 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
782 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
783 | use_short_slot = true; | |
5628221c | 784 | |
471b3efd | 785 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
786 | bss_conf->use_cts_prot = use_protection; |
787 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 788 | } |
7e9ed188 | 789 | |
d43c7b37 | 790 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 791 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 792 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 793 | } |
d9430a32 | 794 | |
7a5158ef | 795 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
796 | bss_conf->use_short_slot = use_short_slot; |
797 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
798 | } |
799 | ||
800 | return changed; | |
801 | } | |
802 | ||
f698d856 | 803 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 804 | struct cfg80211_bss *cbss, |
ae5eb026 | 805 | u32 bss_info_changed) |
f0706e82 | 806 | { |
0c1ad2ca | 807 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 808 | struct ieee80211_local *local = sdata->local; |
d6f2da5b | 809 | |
ae5eb026 | 810 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 811 | /* set timing information */ |
0c1ad2ca JB |
812 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
813 | sdata->vif.bss_conf.timestamp = cbss->tsf; | |
5628221c | 814 | |
77fdaa12 JB |
815 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
816 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 817 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 818 | |
0c1ad2ca JB |
819 | sdata->u.mgd.associated = cbss; |
820 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 821 | |
17e4ec14 JM |
822 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
823 | ||
b291ba11 JB |
824 | /* just to be sure */ |
825 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
826 | IEEE80211_STA_BEACON_POLL); | |
827 | ||
0183826b JB |
828 | /* |
829 | * Always handle WMM once after association regardless | |
830 | * of the first value the AP uses. Setting -1 here has | |
831 | * that effect because the AP values is an unsigned | |
832 | * 4-bit value. | |
833 | */ | |
834 | sdata->u.mgd.wmm_last_param_set = -1; | |
835 | ||
9ac19a90 | 836 | ieee80211_led_assoc(local, 1); |
9306102e | 837 | |
bda3933a | 838 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
839 | /* |
840 | * For now just always ask the driver to update the basic rateset | |
841 | * when we have associated, we aren't checking whether it actually | |
842 | * changed or not. | |
843 | */ | |
ae5eb026 | 844 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
845 | |
846 | /* And the BSSID changed - we're associated now */ | |
847 | bss_info_changed |= BSS_CHANGED_BSSID; | |
848 | ||
a97c13c3 JO |
849 | /* Tell the driver to monitor connection quality (if supported) */ |
850 | if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) && | |
851 | sdata->vif.bss_conf.cqm_rssi_thold) | |
852 | bss_info_changed |= BSS_CHANGED_CQM; | |
853 | ||
ae5eb026 | 854 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 855 | |
056508dc JB |
856 | mutex_lock(&local->iflist_mtx); |
857 | ieee80211_recalc_ps(local, -1); | |
0f78231b | 858 | ieee80211_recalc_smps(local, sdata); |
056508dc | 859 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 860 | |
8a5b33f5 | 861 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 862 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
863 | } |
864 | ||
e69e95db JM |
865 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
866 | bool remove_sta) | |
aa458d17 | 867 | { |
46900298 | 868 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
869 | struct ieee80211_local *local = sdata->local; |
870 | struct sta_info *sta; | |
e0cb686f | 871 | u32 changed = 0, config_changed = 0; |
b291ba11 | 872 | u8 bssid[ETH_ALEN]; |
aa458d17 | 873 | |
77fdaa12 JB |
874 | ASSERT_MGD_MTX(ifmgd); |
875 | ||
b291ba11 JB |
876 | if (WARN_ON(!ifmgd->associated)) |
877 | return; | |
878 | ||
0c1ad2ca | 879 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 880 | |
77fdaa12 JB |
881 | ifmgd->associated = NULL; |
882 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
883 | ||
884 | /* | |
885 | * we need to commit the associated = NULL change because the | |
886 | * scan code uses that to determine whether this iface should | |
887 | * go to/wake up from powersave or not -- and could otherwise | |
888 | * wake the queues erroneously. | |
889 | */ | |
890 | smp_mb(); | |
891 | ||
892 | /* | |
893 | * Thus, we can only afterwards stop the queues -- to account | |
894 | * for the case where another CPU is finishing a scan at this | |
895 | * time -- we don't want the scan code to enable queues. | |
896 | */ | |
aa458d17 | 897 | |
8a5b33f5 | 898 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
899 | netif_carrier_off(sdata->dev); |
900 | ||
1fa6f4af | 901 | rcu_read_lock(); |
abe60632 | 902 | sta = sta_info_get(sdata, bssid); |
4cad6c7c S |
903 | if (sta) { |
904 | set_sta_flags(sta, WLAN_STA_DISASSOC); | |
1fa6f4af | 905 | ieee80211_sta_tear_down_BA_sessions(sta); |
4cad6c7c | 906 | } |
1fa6f4af | 907 | rcu_read_unlock(); |
aa458d17 | 908 | |
f5e5bf25 TW |
909 | changed |= ieee80211_reset_erp_info(sdata); |
910 | ||
f5e5bf25 | 911 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
912 | changed |= BSS_CHANGED_ASSOC; |
913 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 914 | |
aa837e1d JB |
915 | ieee80211_set_wmm_default(sdata); |
916 | ||
4797938c | 917 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
0aaffa9b | 918 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); |
e0cb686f | 919 | |
413ad50a JB |
920 | /* on the next assoc, re-program HT parameters */ |
921 | sdata->ht_opmode_valid = false; | |
922 | ||
a8302de9 VT |
923 | local->power_constr_level = 0; |
924 | ||
520eb820 KV |
925 | del_timer_sync(&local->dynamic_ps_timer); |
926 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
927 | ||
e0cb686f KV |
928 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
929 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
930 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
931 | } | |
ae5eb026 | 932 | |
e0cb686f | 933 | ieee80211_hw_config(local, config_changed); |
9cef8737 | 934 | |
0aaffa9b JB |
935 | /* The BSSID (not really interesting) and HT changed */ |
936 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
ae5eb026 | 937 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 938 | |
e69e95db JM |
939 | if (remove_sta) |
940 | sta_info_destroy_addr(sdata, bssid); | |
aa458d17 | 941 | } |
f0706e82 | 942 | |
3cf335d5 KV |
943 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
944 | struct ieee80211_hdr *hdr) | |
945 | { | |
946 | /* | |
947 | * We can postpone the mgd.timer whenever receiving unicast frames | |
948 | * from AP because we know that the connection is working both ways | |
949 | * at that time. But multicast frames (and hence also beacons) must | |
950 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
951 | * data idle periods for sending the periodic probe request to the |
952 | * AP we're connected to. | |
3cf335d5 | 953 | */ |
b291ba11 JB |
954 | if (is_multicast_ether_addr(hdr->addr1)) |
955 | return; | |
956 | ||
1e4dcd01 JO |
957 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
958 | return; | |
959 | ||
b291ba11 JB |
960 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
961 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
3cf335d5 | 962 | } |
f0706e82 | 963 | |
a43abf29 ML |
964 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
965 | { | |
966 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
967 | const u8 *ssid; | |
968 | ||
0c1ad2ca JB |
969 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
970 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, | |
a43abf29 ML |
971 | ssid + 2, ssid[1], NULL, 0); |
972 | ||
973 | ifmgd->probe_send_count++; | |
974 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; | |
975 | run_again(ifmgd, ifmgd->probe_timeout); | |
976 | } | |
977 | ||
b291ba11 JB |
978 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
979 | bool beacon) | |
04de8381 | 980 | { |
04de8381 | 981 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 982 | bool already = false; |
34bfc411 | 983 | |
9607e6b6 | 984 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
985 | return; |
986 | ||
91a3bd76 LR |
987 | if (sdata->local->scanning) |
988 | return; | |
989 | ||
b8bc4b0a JB |
990 | if (sdata->local->tmp_channel) |
991 | return; | |
992 | ||
77fdaa12 JB |
993 | mutex_lock(&ifmgd->mtx); |
994 | ||
995 | if (!ifmgd->associated) | |
996 | goto out; | |
997 | ||
a860402d | 998 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b291ba11 JB |
999 | if (beacon && net_ratelimit()) |
1000 | printk(KERN_DEBUG "%s: detected beacon loss from AP " | |
47846c9b | 1001 | "- sending probe request\n", sdata->name); |
a860402d | 1002 | #endif |
04de8381 | 1003 | |
b291ba11 JB |
1004 | /* |
1005 | * The driver/our work has already reported this event or the | |
1006 | * connection monitoring has kicked in and we have already sent | |
1007 | * a probe request. Or maybe the AP died and the driver keeps | |
1008 | * reporting until we disassociate... | |
1009 | * | |
1010 | * In either case we have to ignore the current call to this | |
1011 | * function (except for setting the correct probe reason bit) | |
1012 | * because otherwise we would reset the timer every time and | |
1013 | * never check whether we received a probe response! | |
1014 | */ | |
1015 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1016 | IEEE80211_STA_CONNECTION_POLL)) | |
1017 | already = true; | |
1018 | ||
1019 | if (beacon) | |
1020 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
1021 | else | |
1022 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
1023 | ||
1024 | if (already) | |
1025 | goto out; | |
1026 | ||
4e751843 JB |
1027 | mutex_lock(&sdata->local->iflist_mtx); |
1028 | ieee80211_recalc_ps(sdata->local, -1); | |
1029 | mutex_unlock(&sdata->local->iflist_mtx); | |
1030 | ||
a43abf29 ML |
1031 | ifmgd->probe_send_count = 0; |
1032 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
1033 | out: |
1034 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
1035 | } |
1036 | ||
1e4dcd01 JO |
1037 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
1038 | { | |
1039 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1040 | struct ieee80211_local *local = sdata->local; | |
1041 | u8 bssid[ETH_ALEN]; | |
1042 | ||
1043 | mutex_lock(&ifmgd->mtx); | |
1044 | if (!ifmgd->associated) { | |
1045 | mutex_unlock(&ifmgd->mtx); | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
1050 | ||
1051 | printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid); | |
1052 | ||
e69e95db | 1053 | ieee80211_set_disassoc(sdata, true); |
1e4dcd01 JO |
1054 | ieee80211_recalc_idle(local); |
1055 | mutex_unlock(&ifmgd->mtx); | |
1056 | /* | |
1057 | * must be outside lock due to cfg80211, | |
1058 | * but that's not a problem. | |
1059 | */ | |
1060 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1061 | IEEE80211_STYPE_DEAUTH, | |
1062 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
d5cdfacb | 1063 | NULL, true); |
1e4dcd01 JO |
1064 | } |
1065 | ||
1066 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
b291ba11 JB |
1067 | { |
1068 | struct ieee80211_sub_if_data *sdata = | |
1069 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 1070 | u.mgd.beacon_connection_loss_work); |
b291ba11 | 1071 | |
1e4dcd01 JO |
1072 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1073 | __ieee80211_connection_loss(sdata); | |
1074 | else | |
1075 | ieee80211_mgd_probe_ap(sdata, true); | |
b291ba11 JB |
1076 | } |
1077 | ||
04de8381 KV |
1078 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1079 | { | |
1080 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 1081 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1082 | |
b5878a2d JB |
1083 | trace_api_beacon_loss(sdata); |
1084 | ||
1e4dcd01 JO |
1085 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1086 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
04de8381 KV |
1087 | } |
1088 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1089 | ||
1e4dcd01 JO |
1090 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1091 | { | |
1092 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1093 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1094 | ||
b5878a2d JB |
1095 | trace_api_connection_loss(sdata); |
1096 | ||
1e4dcd01 JO |
1097 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); |
1098 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
1099 | } | |
1100 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1101 | ||
1102 | ||
77fdaa12 JB |
1103 | static enum rx_mgmt_action __must_check |
1104 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 1105 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1106 | { |
46900298 | 1107 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 1108 | const u8 *bssid = NULL; |
f0706e82 JB |
1109 | u16 reason_code; |
1110 | ||
f4ea83dd | 1111 | if (len < 24 + 2) |
77fdaa12 | 1112 | return RX_MGMT_NONE; |
f0706e82 | 1113 | |
77fdaa12 JB |
1114 | ASSERT_MGD_MTX(ifmgd); |
1115 | ||
0c1ad2ca | 1116 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
1117 | |
1118 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1119 | ||
77fdaa12 | 1120 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 1121 | sdata->name, bssid, reason_code); |
77fdaa12 | 1122 | |
e69e95db | 1123 | ieee80211_set_disassoc(sdata, true); |
63f170e0 | 1124 | ieee80211_recalc_idle(sdata->local); |
f0706e82 | 1125 | |
77fdaa12 | 1126 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
1127 | } |
1128 | ||
1129 | ||
77fdaa12 JB |
1130 | static enum rx_mgmt_action __must_check |
1131 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1132 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1133 | { |
46900298 | 1134 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1135 | u16 reason_code; |
1136 | ||
f4ea83dd | 1137 | if (len < 24 + 2) |
77fdaa12 | 1138 | return RX_MGMT_NONE; |
f0706e82 | 1139 | |
77fdaa12 JB |
1140 | ASSERT_MGD_MTX(ifmgd); |
1141 | ||
1142 | if (WARN_ON(!ifmgd->associated)) | |
1143 | return RX_MGMT_NONE; | |
1144 | ||
0c1ad2ca | 1145 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
77fdaa12 | 1146 | return RX_MGMT_NONE; |
f0706e82 JB |
1147 | |
1148 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1149 | ||
0ff71613 | 1150 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 1151 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 1152 | |
e69e95db | 1153 | ieee80211_set_disassoc(sdata, true); |
bc83b681 | 1154 | ieee80211_recalc_idle(sdata->local); |
77fdaa12 | 1155 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
1156 | } |
1157 | ||
1158 | ||
af6b6374 JB |
1159 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
1160 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1161 | { |
af6b6374 | 1162 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
46900298 | 1163 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1164 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1165 | struct ieee80211_supported_band *sband; |
f0706e82 | 1166 | struct sta_info *sta; |
0c1ad2ca | 1167 | struct cfg80211_bss *cbss = wk->assoc.bss; |
af6b6374 | 1168 | u8 *pos; |
881d948c | 1169 | u32 rates, basic_rates; |
af6b6374 | 1170 | u16 capab_info, aid; |
f0706e82 | 1171 | struct ieee802_11_elems elems; |
bda3933a | 1172 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1173 | u32 changed = 0; |
5d1ec85f JB |
1174 | int i, j, err; |
1175 | bool have_higher_than_11mbit = false; | |
ae5eb026 | 1176 | u16 ap_ht_cap_flags; |
f0706e82 | 1177 | |
af6b6374 | 1178 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1179 | |
f0706e82 | 1180 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1181 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1182 | |
1dd84aa2 JB |
1183 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1184 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
47846c9b | 1185 | "set\n", sdata->name, aid); |
1dd84aa2 JB |
1186 | aid &= ~(BIT(15) | BIT(14)); |
1187 | ||
af6b6374 JB |
1188 | pos = mgmt->u.assoc_resp.variable; |
1189 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1190 | ||
f0706e82 JB |
1191 | if (!elems.supp_rates) { |
1192 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 1193 | sdata->name); |
af6b6374 | 1194 | return false; |
f0706e82 JB |
1195 | } |
1196 | ||
46900298 | 1197 | ifmgd->aid = aid; |
f0706e82 | 1198 | |
0c1ad2ca | 1199 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
f0706e82 | 1200 | if (!sta) { |
5d1ec85f JB |
1201 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1202 | " the AP\n", sdata->name); | |
af6b6374 | 1203 | return false; |
77fdaa12 | 1204 | } |
05e5e883 | 1205 | |
5d1ec85f JB |
1206 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1207 | WLAN_STA_ASSOC_AP); | |
1208 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1209 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
1210 | ||
60f8b39c JB |
1211 | rates = 0; |
1212 | basic_rates = 0; | |
1213 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1214 | |
60f8b39c JB |
1215 | for (i = 0; i < elems.supp_rates_len; i++) { |
1216 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1217 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1218 | |
60f8b39c JB |
1219 | if (rate > 110) |
1220 | have_higher_than_11mbit = true; | |
1221 | ||
1222 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1223 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1224 | rates |= BIT(j); |
d61272cb TW |
1225 | if (is_basic) |
1226 | basic_rates |= BIT(j); | |
1227 | break; | |
1228 | } | |
f709fc69 | 1229 | } |
f709fc69 LCC |
1230 | } |
1231 | ||
60f8b39c JB |
1232 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1233 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1234 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1235 | |
60f8b39c JB |
1236 | if (rate > 110) |
1237 | have_higher_than_11mbit = true; | |
f0706e82 | 1238 | |
60f8b39c | 1239 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1240 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1241 | rates |= BIT(j); |
d61272cb TW |
1242 | if (is_basic) |
1243 | basic_rates |= BIT(j); | |
1244 | break; | |
1245 | } | |
60f8b39c | 1246 | } |
1ebebea8 | 1247 | } |
f0706e82 | 1248 | |
323ce79a | 1249 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1250 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1251 | |
1252 | /* cf. IEEE 802.11 9.2.12 */ | |
1253 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1254 | have_higher_than_11mbit) | |
1255 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1256 | else | |
1257 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1258 | |
ab1faead | 1259 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1260 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1261 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1262 | |
1263 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1264 | |
4b7679a5 | 1265 | rate_control_rate_init(sta); |
f0706e82 | 1266 | |
46900298 | 1267 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1268 | set_sta_flags(sta, WLAN_STA_MFP); |
1269 | ||
ddf4ac53 | 1270 | if (elems.wmm_param) |
60f8b39c | 1271 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 | 1272 | |
5d1ec85f JB |
1273 | err = sta_info_insert(sta); |
1274 | sta = NULL; | |
1275 | if (err) { | |
1276 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1277 | " the AP (error %d)\n", sdata->name, err); | |
90be561b | 1278 | return false; |
ddf4ac53 JB |
1279 | } |
1280 | ||
ddf4ac53 | 1281 | if (elems.wmm_param) |
46900298 | 1282 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1283 | elems.wmm_param_len); |
aa837e1d JB |
1284 | else |
1285 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1286 | |
e4da8c37 JB |
1287 | local->oper_channel = wk->chan; |
1288 | ||
ae5eb026 | 1289 | if (elems.ht_info_elem && elems.wmm_param && |
af6b6374 | 1290 | (sdata->local->hw.queues >= 4) && |
ab1faead | 1291 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1292 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
0c1ad2ca | 1293 | cbss->bssid, ap_ht_cap_flags); |
ae5eb026 | 1294 | |
60f8b39c JB |
1295 | /* set AID and assoc capability, |
1296 | * ieee80211_set_associated() will tell the driver */ | |
1297 | bss_conf->aid = aid; | |
1298 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 1299 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 1300 | |
d524215f FF |
1301 | /* |
1302 | * If we're using 4-addr mode, let the AP know that we're | |
1303 | * doing so, so that it can create the STA VLAN on its side | |
1304 | */ | |
1305 | if (ifmgd->use_4addr) | |
1306 | ieee80211_send_4addr_nullfunc(local, sdata); | |
1307 | ||
15b7b062 | 1308 | /* |
b291ba11 JB |
1309 | * Start timer to probe the connection to the AP now. |
1310 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 1311 | */ |
b291ba11 JB |
1312 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1313 | mod_beacon_timer(sdata); | |
15b7b062 | 1314 | |
af6b6374 | 1315 | return true; |
f0706e82 JB |
1316 | } |
1317 | ||
1318 | ||
98c8fccf JB |
1319 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1320 | struct ieee80211_mgmt *mgmt, | |
1321 | size_t len, | |
1322 | struct ieee80211_rx_status *rx_status, | |
1323 | struct ieee802_11_elems *elems, | |
1324 | bool beacon) | |
1325 | { | |
1326 | struct ieee80211_local *local = sdata->local; | |
1327 | int freq; | |
c2b13452 | 1328 | struct ieee80211_bss *bss; |
98c8fccf | 1329 | struct ieee80211_channel *channel; |
56007a02 JB |
1330 | bool need_ps = false; |
1331 | ||
1332 | if (sdata->u.mgd.associated) { | |
1333 | bss = (void *)sdata->u.mgd.associated->priv; | |
1334 | /* not previously set so we may need to recalc */ | |
1335 | need_ps = !bss->dtim_period; | |
1336 | } | |
98c8fccf JB |
1337 | |
1338 | if (elems->ds_params && elems->ds_params_len == 1) | |
1339 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1340 | else | |
1341 | freq = rx_status->freq; | |
1342 | ||
1343 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1344 | ||
1345 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1346 | return; | |
1347 | ||
98c8fccf | 1348 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1349 | channel, beacon); |
77fdaa12 JB |
1350 | if (bss) |
1351 | ieee80211_rx_bss_put(local, bss); | |
1352 | ||
1353 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
1354 | return; |
1355 | ||
56007a02 JB |
1356 | if (need_ps) { |
1357 | mutex_lock(&local->iflist_mtx); | |
1358 | ieee80211_recalc_ps(local, -1); | |
1359 | mutex_unlock(&local->iflist_mtx); | |
1360 | } | |
1361 | ||
c481ec97 | 1362 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 1363 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 1364 | ETH_ALEN) == 0)) { |
c481ec97 S |
1365 | struct ieee80211_channel_sw_ie *sw_elem = |
1366 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
5ce6e438 JB |
1367 | ieee80211_sta_process_chanswitch(sdata, sw_elem, |
1368 | bss, rx_status->mactime); | |
c481ec97 | 1369 | } |
f0706e82 JB |
1370 | } |
1371 | ||
1372 | ||
f698d856 | 1373 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 1374 | struct sk_buff *skb) |
f0706e82 | 1375 | { |
af6b6374 | 1376 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 1377 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
1378 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1379 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
1380 | struct ieee802_11_elems elems; |
1381 | ||
15b7b062 KV |
1382 | ifmgd = &sdata->u.mgd; |
1383 | ||
77fdaa12 JB |
1384 | ASSERT_MGD_MTX(ifmgd); |
1385 | ||
47846c9b | 1386 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
8e7cdbb6 TW |
1387 | return; /* ignore ProbeResp to foreign address */ |
1388 | ||
ae6a44e3 EK |
1389 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1390 | if (baselen > len) | |
1391 | return; | |
1392 | ||
1393 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1394 | &elems); | |
1395 | ||
98c8fccf | 1396 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 1397 | |
77fdaa12 | 1398 | if (ifmgd->associated && |
0c1ad2ca | 1399 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
b291ba11 JB |
1400 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1401 | IEEE80211_STA_CONNECTION_POLL)) { | |
1402 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1403 | IEEE80211_STA_BEACON_POLL); | |
4e751843 JB |
1404 | mutex_lock(&sdata->local->iflist_mtx); |
1405 | ieee80211_recalc_ps(sdata->local, -1); | |
1406 | mutex_unlock(&sdata->local->iflist_mtx); | |
7bdfcaaf JO |
1407 | |
1408 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
1409 | return; | |
1410 | ||
b291ba11 JB |
1411 | /* |
1412 | * We've received a probe response, but are not sure whether | |
1413 | * we have or will be receiving any beacons or data, so let's | |
1414 | * schedule the timers again, just in case. | |
1415 | */ | |
1416 | mod_beacon_timer(sdata); | |
7bdfcaaf | 1417 | |
b291ba11 JB |
1418 | mod_timer(&ifmgd->conn_mon_timer, |
1419 | round_jiffies_up(jiffies + | |
1420 | IEEE80211_CONNECTION_IDLE_TIME)); | |
4e751843 | 1421 | } |
f0706e82 JB |
1422 | } |
1423 | ||
d91f36db JB |
1424 | /* |
1425 | * This is the canonical list of information elements we care about, | |
1426 | * the filter code also gives us all changes to the Microsoft OUI | |
1427 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1428 | * | |
1429 | * We implement beacon filtering in software since that means we can | |
1430 | * avoid processing the frame here and in cfg80211, and userspace | |
1431 | * will not be able to tell whether the hardware supports it or not. | |
1432 | * | |
1433 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1434 | * add items it requires. It also needs to be able to tell us to | |
1435 | * look out for other vendor IEs. | |
1436 | */ | |
1437 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1438 | (1ULL << WLAN_EID_COUNTRY) | |
1439 | (1ULL << WLAN_EID_ERP_INFO) | | |
1440 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1441 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1442 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1443 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1444 | |
f698d856 | 1445 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1446 | struct ieee80211_mgmt *mgmt, |
1447 | size_t len, | |
1448 | struct ieee80211_rx_status *rx_status) | |
1449 | { | |
d91f36db | 1450 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 1451 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
1452 | size_t baselen; |
1453 | struct ieee802_11_elems elems; | |
f698d856 | 1454 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1455 | u32 changed = 0; |
d91f36db | 1456 | bool erp_valid, directed_tim = false; |
7a5158ef | 1457 | u8 erp_value = 0; |
d91f36db | 1458 | u32 ncrc; |
77fdaa12 JB |
1459 | u8 *bssid; |
1460 | ||
1461 | ASSERT_MGD_MTX(ifmgd); | |
f0706e82 | 1462 | |
ae6a44e3 EK |
1463 | /* Process beacon from the current BSS */ |
1464 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1465 | if (baselen > len) | |
1466 | return; | |
1467 | ||
d91f36db | 1468 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1469 | return; |
f0706e82 | 1470 | |
b291ba11 JB |
1471 | /* |
1472 | * We might have received a number of frames, among them a | |
1473 | * disassoc frame and a beacon... | |
1474 | */ | |
1475 | if (!ifmgd->associated) | |
77fdaa12 JB |
1476 | return; |
1477 | ||
0c1ad2ca | 1478 | bssid = ifmgd->associated->bssid; |
77fdaa12 | 1479 | |
b291ba11 JB |
1480 | /* |
1481 | * And in theory even frames from a different AP we were just | |
1482 | * associated to a split-second ago! | |
1483 | */ | |
1484 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1485 | return; |
1486 | ||
17e4ec14 JM |
1487 | /* Track average RSSI from the Beacon frames of the current AP */ |
1488 | ifmgd->last_beacon_signal = rx_status->signal; | |
1489 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
1490 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
1491 | ifmgd->ave_beacon_signal = rx_status->signal; | |
1492 | ifmgd->last_cqm_event_signal = 0; | |
1493 | } else { | |
1494 | ifmgd->ave_beacon_signal = | |
1495 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
1496 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
1497 | ifmgd->ave_beacon_signal) / 16; | |
1498 | } | |
1499 | if (bss_conf->cqm_rssi_thold && | |
1500 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) { | |
1501 | int sig = ifmgd->ave_beacon_signal / 16; | |
1502 | int last_event = ifmgd->last_cqm_event_signal; | |
1503 | int thold = bss_conf->cqm_rssi_thold; | |
1504 | int hyst = bss_conf->cqm_rssi_hyst; | |
1505 | if (sig < thold && | |
1506 | (last_event == 0 || sig < last_event - hyst)) { | |
1507 | ifmgd->last_cqm_event_signal = sig; | |
1508 | ieee80211_cqm_rssi_notify( | |
1509 | &sdata->vif, | |
1510 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
1511 | GFP_KERNEL); | |
1512 | } else if (sig > thold && | |
1513 | (last_event == 0 || sig > last_event + hyst)) { | |
1514 | ifmgd->last_cqm_event_signal = sig; | |
1515 | ieee80211_cqm_rssi_notify( | |
1516 | &sdata->vif, | |
1517 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
1518 | GFP_KERNEL); | |
1519 | } | |
1520 | } | |
1521 | ||
b291ba11 | 1522 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 JM |
1523 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1524 | if (net_ratelimit()) { | |
1525 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
47846c9b | 1526 | "to a received beacon\n", sdata->name); |
92778180 JM |
1527 | } |
1528 | #endif | |
b291ba11 | 1529 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
1530 | mutex_lock(&local->iflist_mtx); |
1531 | ieee80211_recalc_ps(local, -1); | |
1532 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
1533 | } |
1534 | ||
b291ba11 JB |
1535 | /* |
1536 | * Push the beacon loss detection into the future since | |
1537 | * we are processing a beacon from the AP just now. | |
1538 | */ | |
1539 | mod_beacon_timer(sdata); | |
1540 | ||
d91f36db JB |
1541 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1542 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1543 | len - baselen, &elems, | |
1544 | care_about_ies, ncrc); | |
1545 | ||
1546 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1547 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1548 | ifmgd->aid); | |
d91f36db | 1549 | |
30196673 JM |
1550 | if (ncrc != ifmgd->beacon_crc) { |
1551 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, | |
1552 | true); | |
d91f36db | 1553 | |
30196673 JM |
1554 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1555 | elems.wmm_param_len); | |
1556 | } | |
fe3fa827 | 1557 | |
25c9c875 | 1558 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1559 | if (directed_tim) { |
572e0012 KV |
1560 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1561 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1562 | ieee80211_hw_config(local, | |
1563 | IEEE80211_CONF_CHANGE_PS); | |
1564 | ieee80211_send_nullfunc(local, sdata, 0); | |
1565 | } else { | |
1566 | local->pspolling = true; | |
1567 | ||
1568 | /* | |
1569 | * Here is assumed that the driver will be | |
1570 | * able to send ps-poll frame and receive a | |
1571 | * response even though power save mode is | |
1572 | * enabled, but some drivers might require | |
1573 | * to disable power save here. This needs | |
1574 | * to be investigated. | |
1575 | */ | |
1576 | ieee80211_send_pspoll(local, sdata); | |
1577 | } | |
a97b77b9 VN |
1578 | } |
1579 | } | |
7a5158ef | 1580 | |
30196673 JM |
1581 | if (ncrc == ifmgd->beacon_crc) |
1582 | return; | |
1583 | ifmgd->beacon_crc = ncrc; | |
1584 | ||
7a5158ef JB |
1585 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1586 | erp_valid = true; | |
1587 | erp_value = elems.erp_info[0]; | |
1588 | } else { | |
1589 | erp_valid = false; | |
50c4afb9 | 1590 | } |
7a5158ef JB |
1591 | changed |= ieee80211_handle_bss_capability(sdata, |
1592 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1593 | erp_valid, erp_value); | |
f0706e82 | 1594 | |
d3c990fb | 1595 | |
53d6f81c | 1596 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 1597 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
1598 | struct sta_info *sta; |
1599 | struct ieee80211_supported_band *sband; | |
1600 | u16 ap_ht_cap_flags; | |
1601 | ||
1602 | rcu_read_lock(); | |
1603 | ||
abe60632 | 1604 | sta = sta_info_get(sdata, bssid); |
77fdaa12 | 1605 | if (WARN_ON(!sta)) { |
ae5eb026 JB |
1606 | rcu_read_unlock(); |
1607 | return; | |
1608 | } | |
1609 | ||
1610 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1611 | ||
1612 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1613 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1614 | ||
1615 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1616 | ||
1617 | rcu_read_unlock(); | |
1618 | ||
1619 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
77fdaa12 | 1620 | bssid, ap_ht_cap_flags); |
d3c990fb RR |
1621 | } |
1622 | ||
8b19e6ca | 1623 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 1624 | if (elems.country_elem) { |
a8302de9 VT |
1625 | /* TODO: IBSS also needs this */ |
1626 | if (elems.pwr_constr_elem) | |
1627 | ieee80211_handle_pwr_constr(sdata, | |
1628 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1629 | elems.pwr_constr_elem, | |
1630 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1631 | } |
1632 | ||
471b3efd | 1633 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1634 | } |
1635 | ||
46900298 | 1636 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
f1d58c25 | 1637 | struct sk_buff *skb) |
f0706e82 | 1638 | { |
f698d856 | 1639 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1640 | struct ieee80211_mgmt *mgmt; |
1641 | u16 fc; | |
1642 | ||
1643 | if (skb->len < 24) | |
46900298 | 1644 | return RX_DROP_MONITOR; |
f0706e82 JB |
1645 | |
1646 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1647 | fc = le16_to_cpu(mgmt->frame_control); | |
1648 | ||
1649 | switch (fc & IEEE80211_FCTL_STYPE) { | |
f0706e82 JB |
1650 | case IEEE80211_STYPE_PROBE_RESP: |
1651 | case IEEE80211_STYPE_BEACON: | |
f0706e82 JB |
1652 | case IEEE80211_STYPE_DEAUTH: |
1653 | case IEEE80211_STYPE_DISASSOC: | |
77fdaa12 | 1654 | case IEEE80211_STYPE_ACTION: |
46900298 | 1655 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
42935eca | 1656 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
46900298 | 1657 | return RX_QUEUED; |
f0706e82 JB |
1658 | } |
1659 | ||
46900298 | 1660 | return RX_DROP_MONITOR; |
f0706e82 JB |
1661 | } |
1662 | ||
f698d856 | 1663 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1664 | struct sk_buff *skb) |
1665 | { | |
77fdaa12 | 1666 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 1667 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 1668 | struct ieee80211_mgmt *mgmt; |
77fdaa12 | 1669 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
1670 | u16 fc; |
1671 | ||
f0706e82 JB |
1672 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1673 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1674 | fc = le16_to_cpu(mgmt->frame_control); | |
1675 | ||
77fdaa12 JB |
1676 | mutex_lock(&ifmgd->mtx); |
1677 | ||
1678 | if (ifmgd->associated && | |
0c1ad2ca | 1679 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
77fdaa12 JB |
1680 | switch (fc & IEEE80211_FCTL_STYPE) { |
1681 | case IEEE80211_STYPE_BEACON: | |
1682 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1683 | rx_status); | |
1684 | break; | |
1685 | case IEEE80211_STYPE_PROBE_RESP: | |
af6b6374 | 1686 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
77fdaa12 JB |
1687 | break; |
1688 | case IEEE80211_STYPE_DEAUTH: | |
63f170e0 | 1689 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
77fdaa12 JB |
1690 | break; |
1691 | case IEEE80211_STYPE_DISASSOC: | |
1692 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1693 | break; | |
1694 | case IEEE80211_STYPE_ACTION: | |
d7907448 FF |
1695 | if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
1696 | break; | |
1697 | ||
77fdaa12 JB |
1698 | ieee80211_sta_process_chanswitch(sdata, |
1699 | &mgmt->u.action.u.chan_switch.sw_elem, | |
5ce6e438 JB |
1700 | (void *)ifmgd->associated->priv, |
1701 | rx_status->mactime); | |
77fdaa12 JB |
1702 | break; |
1703 | } | |
1704 | mutex_unlock(&ifmgd->mtx); | |
1705 | ||
1706 | switch (rma) { | |
1707 | case RX_MGMT_NONE: | |
1708 | /* no action */ | |
1709 | break; | |
1710 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 1711 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1712 | break; |
1713 | case RX_MGMT_CFG80211_DISASSOC: | |
ce470613 | 1714 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1715 | break; |
1716 | default: | |
1717 | WARN(1, "unexpected: %d", rma); | |
1718 | } | |
1719 | goto out; | |
1720 | } | |
1721 | ||
77fdaa12 JB |
1722 | mutex_unlock(&ifmgd->mtx); |
1723 | ||
63f170e0 | 1724 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
af6b6374 | 1725 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) |
ce470613 | 1726 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
f0706e82 | 1727 | |
77fdaa12 | 1728 | out: |
f0706e82 JB |
1729 | kfree_skb(skb); |
1730 | } | |
1731 | ||
9c6bd790 | 1732 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1733 | { |
60f8b39c JB |
1734 | struct ieee80211_sub_if_data *sdata = |
1735 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1736 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1737 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1738 | |
5bb644a0 JB |
1739 | if (local->quiescing) { |
1740 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1741 | return; | |
1742 | } | |
1743 | ||
42935eca | 1744 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
f0706e82 JB |
1745 | } |
1746 | ||
9c6bd790 JB |
1747 | static void ieee80211_sta_work(struct work_struct *work) |
1748 | { | |
1749 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1750 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1751 | struct ieee80211_local *local = sdata->local; |
46900298 | 1752 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1753 | struct sk_buff *skb; |
1754 | ||
9607e6b6 | 1755 | if (!ieee80211_sdata_running(sdata)) |
9c6bd790 JB |
1756 | return; |
1757 | ||
fbe9c429 | 1758 | if (local->scanning) |
9c6bd790 JB |
1759 | return; |
1760 | ||
46900298 | 1761 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1762 | return; |
5bb644a0 JB |
1763 | |
1764 | /* | |
42935eca LR |
1765 | * ieee80211_queue_work() should have picked up most cases, |
1766 | * here we'll pick the the rest. | |
5bb644a0 | 1767 | */ |
42935eca LR |
1768 | if (WARN(local->suspended, "STA MLME work scheduled while " |
1769 | "going to suspend\n")) | |
5bb644a0 JB |
1770 | return; |
1771 | ||
46900298 | 1772 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1773 | |
77fdaa12 | 1774 | /* first process frames to avoid timing out while a frame is pending */ |
46900298 | 1775 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1776 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1777 | ||
77fdaa12 JB |
1778 | /* then process the rest of the work */ |
1779 | mutex_lock(&ifmgd->mtx); | |
1780 | ||
b291ba11 JB |
1781 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1782 | IEEE80211_STA_CONNECTION_POLL) && | |
1783 | ifmgd->associated) { | |
a43abf29 ML |
1784 | u8 bssid[ETH_ALEN]; |
1785 | ||
0c1ad2ca | 1786 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 JB |
1787 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1788 | run_again(ifmgd, ifmgd->probe_timeout); | |
a43abf29 ML |
1789 | |
1790 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { | |
1791 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1792 | printk(KERN_DEBUG "No probe response from AP %pM" | |
1793 | " after %dms, try %d\n", bssid, | |
1794 | (1000 * IEEE80211_PROBE_WAIT)/HZ, | |
1795 | ifmgd->probe_send_count); | |
1796 | #endif | |
1797 | ieee80211_mgd_probe_ap_send(sdata); | |
1798 | } else { | |
b291ba11 JB |
1799 | /* |
1800 | * We actually lost the connection ... or did we? | |
1801 | * Let's make sure! | |
1802 | */ | |
1803 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1804 | IEEE80211_STA_BEACON_POLL); | |
b291ba11 JB |
1805 | printk(KERN_DEBUG "No probe response from AP %pM" |
1806 | " after %dms, disconnecting.\n", | |
1807 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); | |
e69e95db | 1808 | ieee80211_set_disassoc(sdata, true); |
bc83b681 | 1809 | ieee80211_recalc_idle(local); |
b291ba11 JB |
1810 | mutex_unlock(&ifmgd->mtx); |
1811 | /* | |
1812 | * must be outside lock due to cfg80211, | |
1813 | * but that's not a problem. | |
1814 | */ | |
1815 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1816 | IEEE80211_STYPE_DEAUTH, | |
1817 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
d5cdfacb | 1818 | NULL, true); |
b291ba11 JB |
1819 | mutex_lock(&ifmgd->mtx); |
1820 | } | |
1821 | } | |
1822 | ||
77fdaa12 | 1823 | mutex_unlock(&ifmgd->mtx); |
f0706e82 JB |
1824 | } |
1825 | ||
b291ba11 JB |
1826 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1827 | { | |
1828 | struct ieee80211_sub_if_data *sdata = | |
1829 | (struct ieee80211_sub_if_data *) data; | |
1830 | struct ieee80211_local *local = sdata->local; | |
1831 | ||
1832 | if (local->quiescing) | |
1833 | return; | |
1834 | ||
1e4dcd01 JO |
1835 | ieee80211_queue_work(&sdata->local->hw, |
1836 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
1837 | } |
1838 | ||
1839 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
1840 | { | |
1841 | struct ieee80211_sub_if_data *sdata = | |
1842 | (struct ieee80211_sub_if_data *) data; | |
1843 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1844 | struct ieee80211_local *local = sdata->local; | |
1845 | ||
1846 | if (local->quiescing) | |
1847 | return; | |
1848 | ||
42935eca | 1849 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
1850 | } |
1851 | ||
1852 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
1853 | { | |
1854 | struct ieee80211_sub_if_data *sdata = | |
1855 | container_of(work, struct ieee80211_sub_if_data, | |
1856 | u.mgd.monitor_work); | |
1857 | ||
1858 | ieee80211_mgd_probe_ap(sdata, false); | |
1859 | } | |
1860 | ||
9c6bd790 JB |
1861 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1862 | { | |
ad935687 | 1863 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
1864 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1865 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 1866 | |
b291ba11 | 1867 | /* let's probe the connection once */ |
42935eca | 1868 | ieee80211_queue_work(&sdata->local->hw, |
b291ba11 JB |
1869 | &sdata->u.mgd.monitor_work); |
1870 | /* and do all the other regular work too */ | |
42935eca | 1871 | ieee80211_queue_work(&sdata->local->hw, |
46900298 | 1872 | &sdata->u.mgd.work); |
ad935687 | 1873 | } |
9c6bd790 | 1874 | } |
f0706e82 | 1875 | |
5bb644a0 JB |
1876 | #ifdef CONFIG_PM |
1877 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
1878 | { | |
1879 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1880 | ||
1881 | /* | |
1882 | * we need to use atomic bitops for the running bits | |
1883 | * only because both timers might fire at the same | |
1884 | * time -- the code here is properly synchronised. | |
1885 | */ | |
1886 | ||
1887 | cancel_work_sync(&ifmgd->work); | |
1e4dcd01 | 1888 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
5bb644a0 JB |
1889 | if (del_timer_sync(&ifmgd->timer)) |
1890 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1891 | ||
1892 | cancel_work_sync(&ifmgd->chswitch_work); | |
1893 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
1894 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 JB |
1895 | |
1896 | cancel_work_sync(&ifmgd->monitor_work); | |
1897 | /* these will just be re-established on connection */ | |
1898 | del_timer_sync(&ifmgd->conn_mon_timer); | |
1899 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
1900 | } |
1901 | ||
1902 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
1903 | { | |
1904 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1905 | ||
1906 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) | |
1907 | add_timer(&ifmgd->timer); | |
1908 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
1909 | add_timer(&ifmgd->chswitch_timer); | |
1910 | } | |
1911 | #endif | |
1912 | ||
9c6bd790 JB |
1913 | /* interface setup */ |
1914 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1915 | { |
46900298 | 1916 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1917 | |
46900298 JB |
1918 | ifmgd = &sdata->u.mgd; |
1919 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
b291ba11 | 1920 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 1921 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
1922 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
1923 | ieee80211_beacon_connection_loss_work); | |
46900298 | 1924 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 1925 | (unsigned long) sdata); |
b291ba11 JB |
1926 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1927 | (unsigned long) sdata); | |
1928 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
1929 | (unsigned long) sdata); | |
46900298 | 1930 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1931 | (unsigned long) sdata); |
46900298 | 1932 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1933 | |
ab1faead | 1934 | ifmgd->flags = 0; |
bbbdff9e | 1935 | |
77fdaa12 | 1936 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
1937 | |
1938 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
1939 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
1940 | else | |
1941 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
1942 | } |
1943 | ||
77fdaa12 JB |
1944 | /* scan finished notification */ |
1945 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 1946 | { |
77fdaa12 | 1947 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 1948 | |
77fdaa12 JB |
1949 | /* Restart STA timers */ |
1950 | rcu_read_lock(); | |
1951 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1952 | ieee80211_restart_sta_timer(sdata); | |
1953 | rcu_read_unlock(); | |
1954 | } | |
60f8b39c | 1955 | |
77fdaa12 JB |
1956 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1957 | unsigned long data, void *dummy) | |
1958 | { | |
1959 | s32 latency_usec = (s32) data; | |
1960 | struct ieee80211_local *local = | |
1961 | container_of(nb, struct ieee80211_local, | |
1962 | network_latency_notifier); | |
1fa6f4af | 1963 | |
77fdaa12 JB |
1964 | mutex_lock(&local->iflist_mtx); |
1965 | ieee80211_recalc_ps(local, latency_usec); | |
1966 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 1967 | |
77fdaa12 | 1968 | return 0; |
9c6bd790 JB |
1969 | } |
1970 | ||
77fdaa12 | 1971 | /* config hooks */ |
af6b6374 JB |
1972 | static enum work_done_result |
1973 | ieee80211_probe_auth_done(struct ieee80211_work *wk, | |
1974 | struct sk_buff *skb) | |
1975 | { | |
1976 | if (!skb) { | |
1977 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); | |
1978 | return WORK_DONE_DESTROY; | |
1979 | } | |
1980 | ||
1981 | if (wk->type == IEEE80211_WORK_AUTH) { | |
1982 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); | |
1983 | return WORK_DONE_DESTROY; | |
1984 | } | |
1985 | ||
1986 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1987 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); | |
1988 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1989 | ||
1990 | wk->type = IEEE80211_WORK_AUTH; | |
1991 | wk->probe_auth.tries = 0; | |
1992 | return WORK_DONE_REQUEUE; | |
1993 | } | |
1994 | ||
77fdaa12 JB |
1995 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
1996 | struct cfg80211_auth_request *req) | |
9c6bd790 | 1997 | { |
77fdaa12 | 1998 | const u8 *ssid; |
f679f65d | 1999 | struct ieee80211_work *wk; |
77fdaa12 | 2000 | u16 auth_alg; |
9c6bd790 | 2001 | |
d5cdfacb JM |
2002 | if (req->local_state_change) |
2003 | return 0; /* no need to update mac80211 state */ | |
2004 | ||
77fdaa12 JB |
2005 | switch (req->auth_type) { |
2006 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
2007 | auth_alg = WLAN_AUTH_OPEN; | |
2008 | break; | |
2009 | case NL80211_AUTHTYPE_SHARED_KEY: | |
2010 | auth_alg = WLAN_AUTH_SHARED_KEY; | |
2011 | break; | |
2012 | case NL80211_AUTHTYPE_FT: | |
2013 | auth_alg = WLAN_AUTH_FT; | |
2014 | break; | |
2015 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
2016 | auth_alg = WLAN_AUTH_LEAP; | |
2017 | break; | |
2018 | default: | |
2019 | return -EOPNOTSUPP; | |
60f8b39c | 2020 | } |
77fdaa12 JB |
2021 | |
2022 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); | |
2023 | if (!wk) | |
9c6bd790 | 2024 | return -ENOMEM; |
77fdaa12 | 2025 | |
5e124bd5 | 2026 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
77fdaa12 JB |
2027 | |
2028 | if (req->ie && req->ie_len) { | |
2029 | memcpy(wk->ie, req->ie, req->ie_len); | |
2030 | wk->ie_len = req->ie_len; | |
9c6bd790 | 2031 | } |
77fdaa12 | 2032 | |
fffd0934 | 2033 | if (req->key && req->key_len) { |
af6b6374 JB |
2034 | wk->probe_auth.key_len = req->key_len; |
2035 | wk->probe_auth.key_idx = req->key_idx; | |
2036 | memcpy(wk->probe_auth.key, req->key, req->key_len); | |
fffd0934 JB |
2037 | } |
2038 | ||
77fdaa12 | 2039 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
af6b6374 JB |
2040 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
2041 | wk->probe_auth.ssid_len = ssid[1]; | |
f679f65d | 2042 | |
af6b6374 JB |
2043 | wk->probe_auth.algorithm = auth_alg; |
2044 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; | |
77fdaa12 | 2045 | |
070bb547 JB |
2046 | /* if we already have a probe, don't probe again */ |
2047 | if (req->bss->proberesp_ies) | |
2048 | wk->type = IEEE80211_WORK_AUTH; | |
2049 | else | |
2050 | wk->type = IEEE80211_WORK_DIRECT_PROBE; | |
f679f65d | 2051 | wk->chan = req->bss->channel; |
af6b6374 JB |
2052 | wk->sdata = sdata; |
2053 | wk->done = ieee80211_probe_auth_done; | |
77fdaa12 | 2054 | |
af6b6374 | 2055 | ieee80211_add_work(wk); |
9c6bd790 | 2056 | return 0; |
60f8b39c JB |
2057 | } |
2058 | ||
af6b6374 JB |
2059 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
2060 | struct sk_buff *skb) | |
2061 | { | |
2062 | struct ieee80211_mgmt *mgmt; | |
2063 | u16 status; | |
2064 | ||
2065 | if (!skb) { | |
2066 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); | |
2067 | return WORK_DONE_DESTROY; | |
2068 | } | |
2069 | ||
2070 | mgmt = (void *)skb->data; | |
2071 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2072 | ||
2073 | if (status == WLAN_STATUS_SUCCESS) { | |
2074 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
2075 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { | |
2076 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
2077 | /* oops -- internal error -- send timeout for now */ | |
2078 | cfg80211_send_assoc_timeout(wk->sdata->dev, | |
2079 | wk->filter_ta); | |
2080 | return WORK_DONE_DESTROY; | |
2081 | } | |
2082 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
2083 | } | |
2084 | ||
2085 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); | |
2086 | return WORK_DONE_DESTROY; | |
2087 | } | |
2088 | ||
77fdaa12 JB |
2089 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
2090 | struct cfg80211_assoc_request *req) | |
f0706e82 | 2091 | { |
77fdaa12 | 2092 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 2093 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
f679f65d | 2094 | struct ieee80211_work *wk; |
63f170e0 | 2095 | const u8 *ssid; |
af6b6374 | 2096 | int i; |
f0706e82 | 2097 | |
77fdaa12 | 2098 | mutex_lock(&ifmgd->mtx); |
af6b6374 | 2099 | if (ifmgd->associated) { |
9c87ba67 JM |
2100 | if (!req->prev_bssid || |
2101 | memcmp(req->prev_bssid, ifmgd->associated->bssid, | |
2102 | ETH_ALEN)) { | |
2103 | /* | |
2104 | * We are already associated and the request was not a | |
2105 | * reassociation request from the current BSS, so | |
2106 | * reject it. | |
2107 | */ | |
2108 | mutex_unlock(&ifmgd->mtx); | |
2109 | return -EALREADY; | |
2110 | } | |
2111 | ||
2112 | /* Trying to reassociate - clear previous association state */ | |
e69e95db | 2113 | ieee80211_set_disassoc(sdata, true); |
af6b6374 JB |
2114 | } |
2115 | mutex_unlock(&ifmgd->mtx); | |
77fdaa12 | 2116 | |
63f170e0 | 2117 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
af6b6374 JB |
2118 | if (!wk) |
2119 | return -ENOMEM; | |
77fdaa12 | 2120 | |
77fdaa12 | 2121 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
375177bf | 2122 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
77fdaa12 JB |
2123 | |
2124 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) | |
2125 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
2126 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
2127 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
2128 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
2129 | ||
77fdaa12 JB |
2130 | |
2131 | if (req->ie && req->ie_len) { | |
2132 | memcpy(wk->ie, req->ie, req->ie_len); | |
2133 | wk->ie_len = req->ie_len; | |
2134 | } else | |
2135 | wk->ie_len = 0; | |
2136 | ||
0c1ad2ca | 2137 | wk->assoc.bss = req->bss; |
f679f65d | 2138 | |
af6b6374 | 2139 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
f679f65d | 2140 | |
af6b6374 JB |
2141 | /* new association always uses requested smps mode */ |
2142 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { | |
2143 | if (ifmgd->powersave) | |
2144 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
2145 | else | |
2146 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
2147 | } else | |
2148 | ifmgd->ap_smps = ifmgd->req_smps; | |
2149 | ||
2150 | wk->assoc.smps = ifmgd->ap_smps; | |
77c8144a JB |
2151 | /* |
2152 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
2153 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
2154 | * ciphers is configured as pairwise. | |
2155 | * We can set this to true for non-11n hardware, that'll be checked | |
2156 | * separately along with the peer capabilities. | |
2157 | */ | |
af6b6374 | 2158 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
f679f65d | 2159 | wk->assoc.capability = req->bss->capability; |
0c1ad2ca JB |
2160 | wk->assoc.wmm_used = bss->wmm_used; |
2161 | wk->assoc.supp_rates = bss->supp_rates; | |
2162 | wk->assoc.supp_rates_len = bss->supp_rates_len; | |
f679f65d JB |
2163 | wk->assoc.ht_information_ie = |
2164 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); | |
63f170e0 | 2165 | |
ab13315a KV |
2166 | if (bss->wmm_used && bss->uapsd_supported && |
2167 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
2168 | wk->assoc.uapsd_used = true; | |
2169 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; | |
2170 | } else { | |
2171 | wk->assoc.uapsd_used = false; | |
2172 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; | |
2173 | } | |
2174 | ||
63f170e0 | 2175 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
f679f65d JB |
2176 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
2177 | wk->assoc.ssid_len = ssid[1]; | |
63f170e0 | 2178 | |
77fdaa12 | 2179 | if (req->prev_bssid) |
f679f65d | 2180 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 | 2181 | |
f679f65d | 2182 | wk->type = IEEE80211_WORK_ASSOC; |
f679f65d | 2183 | wk->chan = req->bss->channel; |
af6b6374 JB |
2184 | wk->sdata = sdata; |
2185 | wk->done = ieee80211_assoc_done; | |
77fdaa12 JB |
2186 | |
2187 | if (req->use_mfp) { | |
2188 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
2189 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
2190 | } else { | |
2191 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
2192 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
2193 | } | |
2194 | ||
2195 | if (req->crypto.control_port) | |
2196 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
2197 | else | |
2198 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
2199 | ||
af6b6374 JB |
2200 | ieee80211_add_work(wk); |
2201 | return 0; | |
f0706e82 JB |
2202 | } |
2203 | ||
77fdaa12 | 2204 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2205 | struct cfg80211_deauth_request *req, |
2206 | void *cookie) | |
f0706e82 | 2207 | { |
af6b6374 | 2208 | struct ieee80211_local *local = sdata->local; |
46900298 | 2209 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f679f65d | 2210 | struct ieee80211_work *wk; |
63f170e0 | 2211 | const u8 *bssid = req->bss->bssid; |
f0706e82 | 2212 | |
77fdaa12 JB |
2213 | mutex_lock(&ifmgd->mtx); |
2214 | ||
0c1ad2ca | 2215 | if (ifmgd->associated == req->bss) { |
77fdaa12 | 2216 | bssid = req->bss->bssid; |
e69e95db | 2217 | ieee80211_set_disassoc(sdata, true); |
af6b6374 JB |
2218 | mutex_unlock(&ifmgd->mtx); |
2219 | } else { | |
2220 | bool not_auth_yet = false; | |
f0706e82 | 2221 | |
a58ce43f | 2222 | mutex_unlock(&ifmgd->mtx); |
a58ce43f | 2223 | |
af6b6374 JB |
2224 | mutex_lock(&local->work_mtx); |
2225 | list_for_each_entry(wk, &local->work_list, list) { | |
29165e4c | 2226 | if (wk->sdata != sdata) |
af6b6374 | 2227 | continue; |
29165e4c JB |
2228 | |
2229 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE && | |
79733a86 RC |
2230 | wk->type != IEEE80211_WORK_AUTH && |
2231 | wk->type != IEEE80211_WORK_ASSOC) | |
29165e4c JB |
2232 | continue; |
2233 | ||
af6b6374 JB |
2234 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) |
2235 | continue; | |
29165e4c JB |
2236 | |
2237 | not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE; | |
2238 | list_del_rcu(&wk->list); | |
af6b6374 JB |
2239 | free_work(wk); |
2240 | break; | |
2241 | } | |
2242 | mutex_unlock(&local->work_mtx); | |
2243 | ||
2244 | /* | |
2245 | * If somebody requests authentication and we haven't | |
2246 | * sent out an auth frame yet there's no need to send | |
2247 | * out a deauth frame either. If the state was PROBE, | |
2248 | * then this is the case. If it's AUTH we have sent a | |
2249 | * frame, and if it's IDLE we have completed the auth | |
2250 | * process already. | |
2251 | */ | |
2252 | if (not_auth_yet) { | |
2253 | __cfg80211_auth_canceled(sdata->dev, bssid); | |
2254 | return 0; | |
2255 | } | |
2256 | } | |
77fdaa12 | 2257 | |
0ff71613 | 2258 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
47846c9b | 2259 | sdata->name, bssid, req->reason_code); |
0ff71613 | 2260 | |
d5cdfacb JM |
2261 | ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH, |
2262 | req->reason_code, cookie, | |
2263 | !req->local_state_change); | |
f0706e82 | 2264 | |
bc83b681 JB |
2265 | ieee80211_recalc_idle(sdata->local); |
2266 | ||
f0706e82 JB |
2267 | return 0; |
2268 | } | |
84363e6e | 2269 | |
77fdaa12 | 2270 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2271 | struct cfg80211_disassoc_request *req, |
2272 | void *cookie) | |
9c6bd790 | 2273 | { |
77fdaa12 | 2274 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
e69e95db | 2275 | u8 bssid[ETH_ALEN]; |
9c6bd790 | 2276 | |
77fdaa12 | 2277 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 2278 | |
8d8b261a JB |
2279 | /* |
2280 | * cfg80211 should catch this ... but it's racy since | |
2281 | * we can receive a disassoc frame, process it, hand it | |
2282 | * to cfg80211 while that's in a locked section already | |
2283 | * trying to tell us that the user wants to disconnect. | |
2284 | */ | |
0c1ad2ca | 2285 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
2286 | mutex_unlock(&ifmgd->mtx); |
2287 | return -ENOLINK; | |
2288 | } | |
2289 | ||
0ff71613 | 2290 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 2291 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 2292 | |
e69e95db JM |
2293 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
2294 | ieee80211_set_disassoc(sdata, false); | |
77fdaa12 JB |
2295 | |
2296 | mutex_unlock(&ifmgd->mtx); | |
10f644a4 | 2297 | |
77fdaa12 | 2298 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
667503dd | 2299 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
d5cdfacb | 2300 | cookie, !req->local_state_change); |
e69e95db | 2301 | sta_info_destroy_addr(sdata, bssid); |
bc83b681 JB |
2302 | |
2303 | ieee80211_recalc_idle(sdata->local); | |
2304 | ||
10f644a4 JB |
2305 | return 0; |
2306 | } | |
026331c4 JM |
2307 | |
2308 | int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata, | |
2309 | struct ieee80211_channel *chan, | |
2310 | enum nl80211_channel_type channel_type, | |
2311 | const u8 *buf, size_t len, u64 *cookie) | |
2312 | { | |
2313 | struct ieee80211_local *local = sdata->local; | |
2314 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2315 | struct sk_buff *skb; | |
2316 | ||
2317 | /* Check that we are on the requested channel for transmission */ | |
2318 | if ((chan != local->tmp_channel || | |
2319 | channel_type != local->tmp_channel_type) && | |
2320 | (chan != local->oper_channel || | |
0aaffa9b | 2321 | channel_type != local->_oper_channel_type)) |
026331c4 JM |
2322 | return -EBUSY; |
2323 | ||
2324 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + len); | |
2325 | if (!skb) | |
2326 | return -ENOMEM; | |
2327 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2328 | ||
2329 | memcpy(skb_put(skb, len), buf, len); | |
2330 | ||
2331 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) | |
2332 | IEEE80211_SKB_CB(skb)->flags |= | |
2333 | IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
2334 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
2335 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2336 | skb->dev = sdata->dev; | |
2337 | ieee80211_tx_skb(sdata, skb); | |
2338 | ||
2339 | *cookie = (unsigned long) skb; | |
2340 | return 0; | |
2341 | } | |
a97c13c3 JO |
2342 | |
2343 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, | |
2344 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
2345 | gfp_t gfp) | |
2346 | { | |
2347 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2348 | ||
b5878a2d JB |
2349 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
2350 | ||
a97c13c3 JO |
2351 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
2352 | } | |
2353 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |