Root/
1 | /* |
2 | * BSS client mode implementation |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 as |
11 | * published by the Free Software Foundation. |
12 | */ |
13 | |
14 | #include <linux/delay.h> |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> |
17 | #include <linux/if_arp.h> |
18 | #include <linux/etherdevice.h> |
19 | #include <linux/rtnetlink.h> |
20 | #include <linux/pm_qos_params.h> |
21 | #include <linux/crc32.h> |
22 | #include <linux/slab.h> |
23 | #include <net/mac80211.h> |
24 | #include <asm/unaligned.h> |
25 | |
26 | #include "ieee80211_i.h" |
27 | #include "driver-ops.h" |
28 | #include "rate.h" |
29 | #include "led.h" |
30 | |
31 | #define IEEE80211_MAX_PROBE_TRIES 5 |
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 | */ |
42 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
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 | */ |
48 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
49 | |
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 | |
57 | #define TMR_RUNNING_TIMER 0 |
58 | #define TMR_RUNNING_CHANSW 1 |
59 | |
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 | |
82 | /* caller must tell cfg80211 about internal error */ |
83 | RX_MGMT_CFG80211_ASSOC_ERROR, |
84 | }; |
85 | |
86 | /* utils */ |
87 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
88 | { |
89 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); |
90 | } |
91 | |
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 | |
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 | |
121 | static int ecw2cw(int ecw) |
122 | { |
123 | return (1 << ecw) - 1; |
124 | } |
125 | |
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, |
133 | const u8 *bssid, u16 ap_ht_cap_flags) |
134 | { |
135 | struct ieee80211_local *local = sdata->local; |
136 | struct ieee80211_supported_band *sband; |
137 | struct sta_info *sta; |
138 | u32 changed = 0; |
139 | u16 ht_opmode; |
140 | bool enable_ht = true; |
141 | enum nl80211_channel_type prev_chantype; |
142 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
143 | |
144 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
145 | |
146 | prev_chantype = sdata->vif.bss_conf.channel_type; |
147 | |
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: |
165 | if (!(local->hw.conf.channel->flags & |
166 | IEEE80211_CHAN_NO_HT40PLUS)) |
167 | channel_type = NL80211_CHAN_HT40PLUS; |
168 | break; |
169 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
170 | if (!(local->hw.conf.channel->flags & |
171 | IEEE80211_CHAN_NO_HT40MINUS)) |
172 | channel_type = NL80211_CHAN_HT40MINUS; |
173 | break; |
174 | } |
175 | } |
176 | } |
177 | |
178 | if (local->tmp_channel) |
179 | local->tmp_channel_type = channel_type; |
180 | |
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 | } |
186 | |
187 | /* channel_type change automatically detected */ |
188 | ieee80211_hw_config(local, 0); |
189 | |
190 | if (prev_chantype != channel_type) { |
191 | rcu_read_lock(); |
192 | sta = sta_info_get(sdata, bssid); |
193 | if (sta) |
194 | rate_control_rate_update(local, sband, sta, |
195 | IEEE80211_RC_HT_CHANGED, |
196 | channel_type); |
197 | rcu_read_unlock(); |
198 | } |
199 | |
200 | ht_opmode = le16_to_cpu(hti->operation_mode); |
201 | |
202 | /* if bss configuration changed store the new one */ |
203 | if (sdata->ht_opmode_valid != enable_ht || |
204 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode || |
205 | prev_chantype != channel_type) { |
206 | changed |= BSS_CHANGED_HT; |
207 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
208 | sdata->ht_opmode_valid = enable_ht; |
209 | } |
210 | |
211 | return changed; |
212 | } |
213 | |
214 | /* frame sending functions */ |
215 | |
216 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
217 | const u8 *bssid, u16 stype, u16 reason, |
218 | void *cookie, bool send_frame) |
219 | { |
220 | struct ieee80211_local *local = sdata->local; |
221 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
222 | struct sk_buff *skb; |
223 | struct ieee80211_mgmt *mgmt; |
224 | |
225 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
226 | if (!skb) { |
227 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
228 | "deauth/disassoc frame\n", sdata->name); |
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); |
235 | memcpy(mgmt->da, bssid, ETH_ALEN); |
236 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
237 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
238 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
239 | skb_put(skb, 2); |
240 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
241 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
242 | |
243 | if (stype == IEEE80211_STYPE_DEAUTH) |
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); |
248 | else |
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); |
253 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
254 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
255 | |
256 | if (send_frame) |
257 | ieee80211_tx_skb(sdata, skb); |
258 | else |
259 | kfree_skb(skb); |
260 | } |
261 | |
262 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
263 | struct ieee80211_sub_if_data *sdata) |
264 | { |
265 | struct ieee80211_pspoll *pspoll; |
266 | struct sk_buff *skb; |
267 | |
268 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
269 | if (!skb) |
270 | return; |
271 | |
272 | pspoll = (struct ieee80211_pspoll *) skb->data; |
273 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
274 | |
275 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
276 | ieee80211_tx_skb(sdata, skb); |
277 | } |
278 | |
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; |
284 | struct ieee80211_hdr_3addr *nullfunc; |
285 | |
286 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
287 | if (!skb) |
288 | return; |
289 | |
290 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
291 | if (powersave) |
292 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
293 | |
294 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
295 | ieee80211_tx_skb(sdata, skb); |
296 | } |
297 | |
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 | |
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); |
335 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
336 | |
337 | if (!ieee80211_sdata_running(sdata)) |
338 | return; |
339 | |
340 | mutex_lock(&ifmgd->mtx); |
341 | if (!ifmgd->associated) |
342 | goto out; |
343 | |
344 | sdata->local->oper_channel = sdata->local->csa_channel; |
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 | } |
350 | |
351 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
352 | ifmgd->associated->channel = sdata->local->oper_channel; |
353 | |
354 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
355 | IEEE80211_QUEUE_STOP_REASON_CSA); |
356 | out: |
357 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
358 | mutex_unlock(&ifmgd->mtx); |
359 | } |
360 | |
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 | |
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 | |
390 | if (sdata->local->quiescing) { |
391 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
392 | return; |
393 | } |
394 | |
395 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
396 | } |
397 | |
398 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
399 | struct ieee80211_channel_sw_ie *sw_elem, |
400 | struct ieee80211_bss *bss, |
401 | u64 timestamp) |
402 | { |
403 | struct cfg80211_bss *cbss = |
404 | container_of((void *)bss, struct cfg80211_bss, priv); |
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 | |
409 | ASSERT_MGD_MTX(ifmgd); |
410 | |
411 | if (!ifmgd->associated) |
412 | return; |
413 | |
414 | if (sdata->local->scanning) |
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 | |
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 */ |
447 | if (sw_elem->count <= 1) { |
448 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
449 | } else { |
450 | if (sw_elem->mode) |
451 | ieee80211_stop_queues_by_reason(&sdata->local->hw, |
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 * |
457 | cbss->beacon_interval)); |
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 | |
481 | void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif) |
482 | { |
483 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
484 | struct ieee80211_local *local = sdata->local; |
485 | struct ieee80211_conf *conf = &local->hw.conf; |
486 | |
487 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || |
488 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || |
489 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); |
490 | |
491 | local->disable_dynamic_ps = false; |
492 | conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout; |
493 | } |
494 | EXPORT_SYMBOL(ieee80211_enable_dyn_ps); |
495 | |
496 | void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif) |
497 | { |
498 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
499 | struct ieee80211_local *local = sdata->local; |
500 | struct ieee80211_conf *conf = &local->hw.conf; |
501 | |
502 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || |
503 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || |
504 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); |
505 | |
506 | local->disable_dynamic_ps = true; |
507 | conf->dynamic_ps_timeout = 0; |
508 | del_timer_sync(&local->dynamic_ps_timer); |
509 | ieee80211_queue_work(&local->hw, |
510 | &local->dynamic_ps_enable_work); |
511 | } |
512 | EXPORT_SYMBOL(ieee80211_disable_dyn_ps); |
513 | |
514 | /* powersave */ |
515 | static void ieee80211_enable_ps(struct ieee80211_local *local, |
516 | struct ieee80211_sub_if_data *sdata) |
517 | { |
518 | struct ieee80211_conf *conf = &local->hw.conf; |
519 | |
520 | /* |
521 | * If we are scanning right now then the parameters will |
522 | * take effect when scan finishes. |
523 | */ |
524 | if (local->scanning) |
525 | return; |
526 | |
527 | if (conf->dynamic_ps_timeout > 0 && |
528 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { |
529 | mod_timer(&local->dynamic_ps_timer, jiffies + |
530 | msecs_to_jiffies(conf->dynamic_ps_timeout)); |
531 | } else { |
532 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
533 | ieee80211_send_nullfunc(local, sdata, 1); |
534 | |
535 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
536 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
537 | return; |
538 | |
539 | conf->flags |= IEEE80211_CONF_PS; |
540 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
541 | } |
542 | } |
543 | |
544 | static void ieee80211_change_ps(struct ieee80211_local *local) |
545 | { |
546 | struct ieee80211_conf *conf = &local->hw.conf; |
547 | |
548 | if (local->ps_sdata) { |
549 | ieee80211_enable_ps(local, local->ps_sdata); |
550 | } else if (conf->flags & IEEE80211_CONF_PS) { |
551 | conf->flags &= ~IEEE80211_CONF_PS; |
552 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
553 | del_timer_sync(&local->dynamic_ps_timer); |
554 | cancel_work_sync(&local->dynamic_ps_enable_work); |
555 | } |
556 | } |
557 | |
558 | /* need to hold RTNL or interface lock */ |
559 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
560 | { |
561 | struct ieee80211_sub_if_data *sdata, *found = NULL; |
562 | int count = 0; |
563 | int timeout; |
564 | |
565 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { |
566 | local->ps_sdata = NULL; |
567 | return; |
568 | } |
569 | |
570 | if (!list_empty(&local->work_list)) { |
571 | local->ps_sdata = NULL; |
572 | goto change; |
573 | } |
574 | |
575 | list_for_each_entry(sdata, &local->interfaces, list) { |
576 | if (!ieee80211_sdata_running(sdata)) |
577 | continue; |
578 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
579 | continue; |
580 | found = sdata; |
581 | count++; |
582 | } |
583 | |
584 | if (count == 1 && found->u.mgd.powersave && |
585 | found->u.mgd.associated && |
586 | found->u.mgd.associated->beacon_ies && |
587 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
588 | IEEE80211_STA_CONNECTION_POLL))) { |
589 | struct ieee80211_conf *conf = &local->hw.conf; |
590 | s32 beaconint_us; |
591 | |
592 | if (latency < 0) |
593 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
594 | |
595 | beaconint_us = ieee80211_tu_to_usec( |
596 | found->vif.bss_conf.beacon_int); |
597 | |
598 | timeout = local->dynamic_ps_forced_timeout; |
599 | if (timeout < 0) { |
600 | /* |
601 | * Go to full PSM if the user configures a very low |
602 | * latency requirement. |
603 | * The 2 second value is there for compatibility until |
604 | * the PM_QOS_NETWORK_LATENCY is configured with real |
605 | * values. |
606 | */ |
607 | if (latency > 1900000000 && latency != 2000000000) |
608 | timeout = 0; |
609 | else |
610 | timeout = 100; |
611 | } |
612 | local->dynamic_ps_user_timeout = timeout; |
613 | if (!local->disable_dynamic_ps) |
614 | conf->dynamic_ps_timeout = |
615 | local->dynamic_ps_user_timeout; |
616 | |
617 | if (beaconint_us > latency) { |
618 | local->ps_sdata = NULL; |
619 | } else { |
620 | struct ieee80211_bss *bss; |
621 | int maxslp = 1; |
622 | u8 dtimper; |
623 | |
624 | bss = (void *)found->u.mgd.associated->priv; |
625 | dtimper = bss->dtim_period; |
626 | |
627 | /* If the TIM IE is invalid, pretend the value is 1 */ |
628 | if (!dtimper) |
629 | dtimper = 1; |
630 | else if (dtimper > 1) |
631 | maxslp = min_t(int, dtimper, |
632 | latency / beaconint_us); |
633 | |
634 | local->hw.conf.max_sleep_period = maxslp; |
635 | local->hw.conf.ps_dtim_period = dtimper; |
636 | local->ps_sdata = found; |
637 | } |
638 | } else { |
639 | local->ps_sdata = NULL; |
640 | } |
641 | |
642 | change: |
643 | ieee80211_change_ps(local); |
644 | } |
645 | |
646 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
647 | { |
648 | struct ieee80211_local *local = |
649 | container_of(work, struct ieee80211_local, |
650 | dynamic_ps_disable_work); |
651 | |
652 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
653 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
654 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
655 | } |
656 | |
657 | ieee80211_wake_queues_by_reason(&local->hw, |
658 | IEEE80211_QUEUE_STOP_REASON_PS); |
659 | } |
660 | |
661 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
662 | { |
663 | struct ieee80211_local *local = |
664 | container_of(work, struct ieee80211_local, |
665 | dynamic_ps_enable_work); |
666 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
667 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
668 | |
669 | /* can only happen when PS was just disabled anyway */ |
670 | if (!sdata) |
671 | return; |
672 | |
673 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
674 | return; |
675 | |
676 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
677 | (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) |
678 | ieee80211_send_nullfunc(local, sdata, 1); |
679 | |
680 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
681 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || |
682 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
683 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
684 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
685 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
686 | } |
687 | } |
688 | |
689 | void ieee80211_dynamic_ps_timer(unsigned long data) |
690 | { |
691 | struct ieee80211_local *local = (void *) data; |
692 | |
693 | if (local->quiescing || local->suspended) |
694 | return; |
695 | |
696 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
697 | } |
698 | |
699 | /* MLME */ |
700 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
701 | struct ieee80211_sub_if_data *sdata, |
702 | u8 *wmm_param, size_t wmm_param_len) |
703 | { |
704 | struct ieee80211_tx_queue_params params; |
705 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
706 | size_t left; |
707 | int count; |
708 | u8 *pos, uapsd_queues = 0; |
709 | |
710 | if (!local->ops->conf_tx) |
711 | return; |
712 | |
713 | if (local->hw.queues < 4) |
714 | return; |
715 | |
716 | if (!wmm_param) |
717 | return; |
718 | |
719 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
720 | return; |
721 | |
722 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) |
723 | uapsd_queues = local->uapsd_queues; |
724 | |
725 | count = wmm_param[6] & 0x0f; |
726 | if (count == ifmgd->wmm_last_param_set) |
727 | return; |
728 | ifmgd->wmm_last_param_set = count; |
729 | |
730 | pos = wmm_param + 8; |
731 | left = wmm_param_len - 8; |
732 | |
733 | memset(¶ms, 0, sizeof(params)); |
734 | |
735 | local->wmm_acm = 0; |
736 | for (; left >= 4; left -= 4, pos += 4) { |
737 | int aci = (pos[0] >> 5) & 0x03; |
738 | int acm = (pos[0] >> 4) & 0x01; |
739 | bool uapsd = false; |
740 | int queue; |
741 | |
742 | switch (aci) { |
743 | case 1: /* AC_BK */ |
744 | queue = 3; |
745 | if (acm) |
746 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
747 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
748 | uapsd = true; |
749 | break; |
750 | case 2: /* AC_VI */ |
751 | queue = 1; |
752 | if (acm) |
753 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
754 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
755 | uapsd = true; |
756 | break; |
757 | case 3: /* AC_VO */ |
758 | queue = 0; |
759 | if (acm) |
760 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
761 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
762 | uapsd = true; |
763 | break; |
764 | case 0: /* AC_BE */ |
765 | default: |
766 | queue = 2; |
767 | if (acm) |
768 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
769 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
770 | uapsd = true; |
771 | break; |
772 | } |
773 | |
774 | params.aifs = pos[0] & 0x0f; |
775 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
776 | params.cw_min = ecw2cw(pos[1] & 0x0f); |
777 | params.txop = get_unaligned_le16(pos + 2); |
778 | params.uapsd = uapsd; |
779 | |
780 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
781 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
782 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
783 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
784 | params.aifs, params.cw_min, params.cw_max, params.txop, |
785 | params.uapsd); |
786 | #endif |
787 | if (drv_conf_tx(local, queue, ¶ms)) |
788 | printk(KERN_DEBUG "%s: failed to set TX queue " |
789 | "parameters for queue %d\n", |
790 | wiphy_name(local->hw.wiphy), queue); |
791 | } |
792 | |
793 | /* enable WMM or activate new settings */ |
794 | sdata->vif.bss_conf.qos = true; |
795 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); |
796 | } |
797 | |
798 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
799 | u16 capab, bool erp_valid, u8 erp) |
800 | { |
801 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
802 | u32 changed = 0; |
803 | bool use_protection; |
804 | bool use_short_preamble; |
805 | bool use_short_slot; |
806 | |
807 | if (erp_valid) { |
808 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
809 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
810 | } else { |
811 | use_protection = false; |
812 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
813 | } |
814 | |
815 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
816 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
817 | use_short_slot = true; |
818 | |
819 | if (use_protection != bss_conf->use_cts_prot) { |
820 | bss_conf->use_cts_prot = use_protection; |
821 | changed |= BSS_CHANGED_ERP_CTS_PROT; |
822 | } |
823 | |
824 | if (use_short_preamble != bss_conf->use_short_preamble) { |
825 | bss_conf->use_short_preamble = use_short_preamble; |
826 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
827 | } |
828 | |
829 | if (use_short_slot != bss_conf->use_short_slot) { |
830 | bss_conf->use_short_slot = use_short_slot; |
831 | changed |= BSS_CHANGED_ERP_SLOT; |
832 | } |
833 | |
834 | return changed; |
835 | } |
836 | |
837 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
838 | struct cfg80211_bss *cbss, |
839 | u32 bss_info_changed) |
840 | { |
841 | struct ieee80211_bss *bss = (void *)cbss->priv; |
842 | struct ieee80211_local *local = sdata->local; |
843 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
844 | |
845 | bss_info_changed |= BSS_CHANGED_ASSOC; |
846 | /* set timing information */ |
847 | bss_conf->beacon_int = cbss->beacon_interval; |
848 | bss_conf->timestamp = cbss->tsf; |
849 | |
850 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
851 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
852 | cbss->capability, bss->has_erp_value, bss->erp_value); |
853 | |
854 | sdata->u.mgd.associated = cbss; |
855 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
856 | |
857 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
858 | |
859 | /* just to be sure */ |
860 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
861 | IEEE80211_STA_BEACON_POLL); |
862 | |
863 | /* |
864 | * Always handle WMM once after association regardless |
865 | * of the first value the AP uses. Setting -1 here has |
866 | * that effect because the AP values is an unsigned |
867 | * 4-bit value. |
868 | */ |
869 | sdata->u.mgd.wmm_last_param_set = -1; |
870 | |
871 | ieee80211_led_assoc(local, 1); |
872 | |
873 | if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) |
874 | bss_conf->dtim_period = bss->dtim_period; |
875 | else |
876 | bss_conf->dtim_period = 0; |
877 | |
878 | bss_conf->assoc = 1; |
879 | /* |
880 | * For now just always ask the driver to update the basic rateset |
881 | * when we have associated, we aren't checking whether it actually |
882 | * changed or not. |
883 | */ |
884 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
885 | |
886 | /* And the BSSID changed - we're associated now */ |
887 | bss_info_changed |= BSS_CHANGED_BSSID; |
888 | |
889 | /* Tell the driver to monitor connection quality (if supported) */ |
890 | if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) && |
891 | bss_conf->cqm_rssi_thold) |
892 | bss_info_changed |= BSS_CHANGED_CQM; |
893 | |
894 | /* Enable ARP filtering */ |
895 | if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) { |
896 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; |
897 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; |
898 | } |
899 | |
900 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
901 | |
902 | mutex_lock(&local->iflist_mtx); |
903 | ieee80211_recalc_ps(local, -1); |
904 | ieee80211_recalc_smps(local, sdata); |
905 | mutex_unlock(&local->iflist_mtx); |
906 | |
907 | netif_tx_start_all_queues(sdata->dev); |
908 | netif_carrier_on(sdata->dev); |
909 | } |
910 | |
911 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
912 | bool remove_sta) |
913 | { |
914 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
915 | struct ieee80211_local *local = sdata->local; |
916 | struct sta_info *sta; |
917 | u32 changed = 0, config_changed = 0; |
918 | u8 bssid[ETH_ALEN]; |
919 | |
920 | ASSERT_MGD_MTX(ifmgd); |
921 | |
922 | if (WARN_ON(!ifmgd->associated)) |
923 | return; |
924 | |
925 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
926 | |
927 | ifmgd->associated = NULL; |
928 | memset(ifmgd->bssid, 0, ETH_ALEN); |
929 | |
930 | /* |
931 | * we need to commit the associated = NULL change because the |
932 | * scan code uses that to determine whether this iface should |
933 | * go to/wake up from powersave or not -- and could otherwise |
934 | * wake the queues erroneously. |
935 | */ |
936 | smp_mb(); |
937 | |
938 | /* |
939 | * Thus, we can only afterwards stop the queues -- to account |
940 | * for the case where another CPU is finishing a scan at this |
941 | * time -- we don't want the scan code to enable queues. |
942 | */ |
943 | |
944 | netif_tx_stop_all_queues(sdata->dev); |
945 | netif_carrier_off(sdata->dev); |
946 | |
947 | mutex_lock(&local->sta_mtx); |
948 | sta = sta_info_get(sdata, bssid); |
949 | if (sta) { |
950 | set_sta_flags(sta, WLAN_STA_BLOCK_BA); |
951 | ieee80211_sta_tear_down_BA_sessions(sta); |
952 | } |
953 | mutex_unlock(&local->sta_mtx); |
954 | |
955 | changed |= ieee80211_reset_erp_info(sdata); |
956 | |
957 | ieee80211_led_assoc(local, 0); |
958 | changed |= BSS_CHANGED_ASSOC; |
959 | sdata->vif.bss_conf.assoc = false; |
960 | |
961 | ieee80211_set_wmm_default(sdata); |
962 | |
963 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
964 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); |
965 | |
966 | /* on the next assoc, re-program HT parameters */ |
967 | sdata->ht_opmode_valid = false; |
968 | |
969 | local->power_constr_level = 0; |
970 | |
971 | del_timer_sync(&local->dynamic_ps_timer); |
972 | cancel_work_sync(&local->dynamic_ps_enable_work); |
973 | |
974 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
975 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
976 | config_changed |= IEEE80211_CONF_CHANGE_PS; |
977 | } |
978 | |
979 | ieee80211_hw_config(local, config_changed); |
980 | |
981 | /* Disable ARP filtering */ |
982 | if (sdata->vif.bss_conf.arp_filter_enabled) { |
983 | sdata->vif.bss_conf.arp_filter_enabled = false; |
984 | changed |= BSS_CHANGED_ARP_FILTER; |
985 | } |
986 | |
987 | /* The BSSID (not really interesting) and HT changed */ |
988 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; |
989 | ieee80211_bss_info_change_notify(sdata, changed); |
990 | |
991 | if (remove_sta) |
992 | sta_info_destroy_addr(sdata, bssid); |
993 | } |
994 | |
995 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
996 | struct ieee80211_hdr *hdr) |
997 | { |
998 | /* |
999 | * We can postpone the mgd.timer whenever receiving unicast frames |
1000 | * from AP because we know that the connection is working both ways |
1001 | * at that time. But multicast frames (and hence also beacons) must |
1002 | * be ignored here, because we need to trigger the timer during |
1003 | * data idle periods for sending the periodic probe request to the |
1004 | * AP we're connected to. |
1005 | */ |
1006 | if (is_multicast_ether_addr(hdr->addr1)) |
1007 | return; |
1008 | |
1009 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1010 | return; |
1011 | |
1012 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
1013 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
1014 | } |
1015 | |
1016 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1017 | { |
1018 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1019 | const u8 *ssid; |
1020 | |
1021 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
1022 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, |
1023 | ssid + 2, ssid[1], NULL, 0); |
1024 | |
1025 | ifmgd->probe_send_count++; |
1026 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; |
1027 | run_again(ifmgd, ifmgd->probe_timeout); |
1028 | } |
1029 | |
1030 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1031 | bool beacon) |
1032 | { |
1033 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1034 | bool already = false; |
1035 | |
1036 | if (!ieee80211_sdata_running(sdata)) |
1037 | return; |
1038 | |
1039 | if (sdata->local->scanning) |
1040 | return; |
1041 | |
1042 | if (sdata->local->tmp_channel) |
1043 | return; |
1044 | |
1045 | mutex_lock(&ifmgd->mtx); |
1046 | |
1047 | if (!ifmgd->associated) |
1048 | goto out; |
1049 | |
1050 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1051 | if (beacon && net_ratelimit()) |
1052 | printk(KERN_DEBUG "%s: detected beacon loss from AP " |
1053 | "- sending probe request\n", sdata->name); |
1054 | #endif |
1055 | |
1056 | /* |
1057 | * The driver/our work has already reported this event or the |
1058 | * connection monitoring has kicked in and we have already sent |
1059 | * a probe request. Or maybe the AP died and the driver keeps |
1060 | * reporting until we disassociate... |
1061 | * |
1062 | * In either case we have to ignore the current call to this |
1063 | * function (except for setting the correct probe reason bit) |
1064 | * because otherwise we would reset the timer every time and |
1065 | * never check whether we received a probe response! |
1066 | */ |
1067 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1068 | IEEE80211_STA_CONNECTION_POLL)) |
1069 | already = true; |
1070 | |
1071 | if (beacon) |
1072 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; |
1073 | else |
1074 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
1075 | |
1076 | if (already) |
1077 | goto out; |
1078 | |
1079 | mutex_lock(&sdata->local->iflist_mtx); |
1080 | ieee80211_recalc_ps(sdata->local, -1); |
1081 | mutex_unlock(&sdata->local->iflist_mtx); |
1082 | |
1083 | ifmgd->probe_send_count = 0; |
1084 | ieee80211_mgd_probe_ap_send(sdata); |
1085 | out: |
1086 | mutex_unlock(&ifmgd->mtx); |
1087 | } |
1088 | |
1089 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
1090 | { |
1091 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1092 | struct ieee80211_local *local = sdata->local; |
1093 | u8 bssid[ETH_ALEN]; |
1094 | |
1095 | mutex_lock(&ifmgd->mtx); |
1096 | if (!ifmgd->associated) { |
1097 | mutex_unlock(&ifmgd->mtx); |
1098 | return; |
1099 | } |
1100 | |
1101 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
1102 | |
1103 | printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid); |
1104 | |
1105 | ieee80211_set_disassoc(sdata, true); |
1106 | ieee80211_recalc_idle(local); |
1107 | mutex_unlock(&ifmgd->mtx); |
1108 | /* |
1109 | * must be outside lock due to cfg80211, |
1110 | * but that's not a problem. |
1111 | */ |
1112 | ieee80211_send_deauth_disassoc(sdata, bssid, |
1113 | IEEE80211_STYPE_DEAUTH, |
1114 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
1115 | NULL, true); |
1116 | } |
1117 | |
1118 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) |
1119 | { |
1120 | struct ieee80211_sub_if_data *sdata = |
1121 | container_of(work, struct ieee80211_sub_if_data, |
1122 | u.mgd.beacon_connection_loss_work); |
1123 | |
1124 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1125 | __ieee80211_connection_loss(sdata); |
1126 | else |
1127 | ieee80211_mgd_probe_ap(sdata, true); |
1128 | } |
1129 | |
1130 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1131 | { |
1132 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
1133 | struct ieee80211_hw *hw = &sdata->local->hw; |
1134 | |
1135 | trace_api_beacon_loss(sdata); |
1136 | |
1137 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1138 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
1139 | } |
1140 | EXPORT_SYMBOL(ieee80211_beacon_loss); |
1141 | |
1142 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1143 | { |
1144 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
1145 | struct ieee80211_hw *hw = &sdata->local->hw; |
1146 | |
1147 | trace_api_connection_loss(sdata); |
1148 | |
1149 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); |
1150 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); |
1151 | } |
1152 | EXPORT_SYMBOL(ieee80211_connection_loss); |
1153 | |
1154 | |
1155 | static enum rx_mgmt_action __must_check |
1156 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
1157 | struct ieee80211_mgmt *mgmt, size_t len) |
1158 | { |
1159 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1160 | const u8 *bssid = NULL; |
1161 | u16 reason_code; |
1162 | |
1163 | if (len < 24 + 2) |
1164 | return RX_MGMT_NONE; |
1165 | |
1166 | ASSERT_MGD_MTX(ifmgd); |
1167 | |
1168 | bssid = ifmgd->associated->bssid; |
1169 | |
1170 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
1171 | |
1172 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
1173 | sdata->name, bssid, reason_code); |
1174 | |
1175 | ieee80211_set_disassoc(sdata, true); |
1176 | ieee80211_recalc_idle(sdata->local); |
1177 | |
1178 | return RX_MGMT_CFG80211_DEAUTH; |
1179 | } |
1180 | |
1181 | |
1182 | static enum rx_mgmt_action __must_check |
1183 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
1184 | struct ieee80211_mgmt *mgmt, size_t len) |
1185 | { |
1186 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1187 | u16 reason_code; |
1188 | |
1189 | if (len < 24 + 2) |
1190 | return RX_MGMT_NONE; |
1191 | |
1192 | ASSERT_MGD_MTX(ifmgd); |
1193 | |
1194 | if (WARN_ON(!ifmgd->associated)) |
1195 | return RX_MGMT_NONE; |
1196 | |
1197 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
1198 | return RX_MGMT_NONE; |
1199 | |
1200 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
1201 | |
1202 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
1203 | sdata->name, mgmt->sa, reason_code); |
1204 | |
1205 | ieee80211_set_disassoc(sdata, true); |
1206 | ieee80211_recalc_idle(sdata->local); |
1207 | return RX_MGMT_CFG80211_DISASSOC; |
1208 | } |
1209 | |
1210 | |
1211 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
1212 | struct ieee80211_mgmt *mgmt, size_t len) |
1213 | { |
1214 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
1215 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1216 | struct ieee80211_local *local = sdata->local; |
1217 | struct ieee80211_supported_band *sband; |
1218 | struct sta_info *sta; |
1219 | struct cfg80211_bss *cbss = wk->assoc.bss; |
1220 | u8 *pos; |
1221 | u32 rates, basic_rates; |
1222 | u16 capab_info, aid; |
1223 | struct ieee802_11_elems elems; |
1224 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
1225 | u32 changed = 0; |
1226 | int i, j, err; |
1227 | bool have_higher_than_11mbit = false; |
1228 | u16 ap_ht_cap_flags; |
1229 | |
1230 | /* AssocResp and ReassocResp have identical structure */ |
1231 | |
1232 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
1233 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
1234 | |
1235 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1236 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " |
1237 | "set\n", sdata->name, aid); |
1238 | aid &= ~(BIT(15) | BIT(14)); |
1239 | |
1240 | pos = mgmt->u.assoc_resp.variable; |
1241 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
1242 | |
1243 | if (!elems.supp_rates) { |
1244 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", |
1245 | sdata->name); |
1246 | return false; |
1247 | } |
1248 | |
1249 | ifmgd->aid = aid; |
1250 | |
1251 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
1252 | if (!sta) { |
1253 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1254 | " the AP\n", sdata->name); |
1255 | return false; |
1256 | } |
1257 | |
1258 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1259 | WLAN_STA_ASSOC_AP); |
1260 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
1261 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
1262 | |
1263 | rates = 0; |
1264 | basic_rates = 0; |
1265 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1266 | |
1267 | for (i = 0; i < elems.supp_rates_len; i++) { |
1268 | int rate = (elems.supp_rates[i] & 0x7f) * 5; |
1269 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
1270 | |
1271 | if (rate > 110) |
1272 | have_higher_than_11mbit = true; |
1273 | |
1274 | for (j = 0; j < sband->n_bitrates; j++) { |
1275 | if (sband->bitrates[j].bitrate == rate) { |
1276 | rates |= BIT(j); |
1277 | if (is_basic) |
1278 | basic_rates |= BIT(j); |
1279 | break; |
1280 | } |
1281 | } |
1282 | } |
1283 | |
1284 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1285 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; |
1286 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
1287 | |
1288 | if (rate > 110) |
1289 | have_higher_than_11mbit = true; |
1290 | |
1291 | for (j = 0; j < sband->n_bitrates; j++) { |
1292 | if (sband->bitrates[j].bitrate == rate) { |
1293 | rates |= BIT(j); |
1294 | if (is_basic) |
1295 | basic_rates |= BIT(j); |
1296 | break; |
1297 | } |
1298 | } |
1299 | } |
1300 | |
1301 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
1302 | sdata->vif.bss_conf.basic_rates = basic_rates; |
1303 | |
1304 | /* cf. IEEE 802.11 9.2.12 */ |
1305 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
1306 | have_higher_than_11mbit) |
1307 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
1308 | else |
1309 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
1310 | |
1311 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
1312 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
1313 | elems.ht_cap_elem, &sta->sta.ht_cap); |
1314 | |
1315 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
1316 | |
1317 | rate_control_rate_init(sta); |
1318 | |
1319 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
1320 | set_sta_flags(sta, WLAN_STA_MFP); |
1321 | |
1322 | if (elems.wmm_param) |
1323 | set_sta_flags(sta, WLAN_STA_WME); |
1324 | |
1325 | err = sta_info_insert(sta); |
1326 | sta = NULL; |
1327 | if (err) { |
1328 | printk(KERN_DEBUG "%s: failed to insert STA entry for" |
1329 | " the AP (error %d)\n", sdata->name, err); |
1330 | return false; |
1331 | } |
1332 | |
1333 | if (elems.wmm_param) |
1334 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
1335 | elems.wmm_param_len); |
1336 | else |
1337 | ieee80211_set_wmm_default(sdata); |
1338 | |
1339 | local->oper_channel = wk->chan; |
1340 | |
1341 | if (elems.ht_info_elem && elems.wmm_param && |
1342 | (sdata->local->hw.queues >= 4) && |
1343 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
1344 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1345 | cbss->bssid, ap_ht_cap_flags); |
1346 | |
1347 | /* set AID and assoc capability, |
1348 | * ieee80211_set_associated() will tell the driver */ |
1349 | bss_conf->aid = aid; |
1350 | bss_conf->assoc_capability = capab_info; |
1351 | ieee80211_set_associated(sdata, cbss, changed); |
1352 | |
1353 | /* |
1354 | * If we're using 4-addr mode, let the AP know that we're |
1355 | * doing so, so that it can create the STA VLAN on its side |
1356 | */ |
1357 | if (ifmgd->use_4addr) |
1358 | ieee80211_send_4addr_nullfunc(local, sdata); |
1359 | |
1360 | /* |
1361 | * Start timer to probe the connection to the AP now. |
1362 | * Also start the timer that will detect beacon loss. |
1363 | */ |
1364 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1365 | mod_beacon_timer(sdata); |
1366 | |
1367 | return true; |
1368 | } |
1369 | |
1370 | |
1371 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1372 | struct ieee80211_mgmt *mgmt, |
1373 | size_t len, |
1374 | struct ieee80211_rx_status *rx_status, |
1375 | struct ieee802_11_elems *elems, |
1376 | bool beacon) |
1377 | { |
1378 | struct ieee80211_local *local = sdata->local; |
1379 | int freq; |
1380 | struct ieee80211_bss *bss; |
1381 | struct ieee80211_channel *channel; |
1382 | bool need_ps = false; |
1383 | |
1384 | if (sdata->u.mgd.associated) { |
1385 | bss = (void *)sdata->u.mgd.associated->priv; |
1386 | /* not previously set so we may need to recalc */ |
1387 | need_ps = !bss->dtim_period; |
1388 | } |
1389 | |
1390 | if (elems->ds_params && elems->ds_params_len == 1) |
1391 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); |
1392 | else |
1393 | freq = rx_status->freq; |
1394 | |
1395 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
1396 | |
1397 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
1398 | return; |
1399 | |
1400 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
1401 | channel, beacon); |
1402 | if (bss) |
1403 | ieee80211_rx_bss_put(local, bss); |
1404 | |
1405 | if (!sdata->u.mgd.associated) |
1406 | return; |
1407 | |
1408 | if (need_ps) { |
1409 | mutex_lock(&local->iflist_mtx); |
1410 | ieee80211_recalc_ps(local, -1); |
1411 | mutex_unlock(&local->iflist_mtx); |
1412 | } |
1413 | |
1414 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
1415 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
1416 | ETH_ALEN) == 0)) { |
1417 | struct ieee80211_channel_sw_ie *sw_elem = |
1418 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; |
1419 | ieee80211_sta_process_chanswitch(sdata, sw_elem, |
1420 | bss, rx_status->mactime); |
1421 | } |
1422 | } |
1423 | |
1424 | |
1425 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
1426 | struct sk_buff *skb) |
1427 | { |
1428 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1429 | struct ieee80211_if_managed *ifmgd; |
1430 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1431 | size_t baselen, len = skb->len; |
1432 | struct ieee802_11_elems elems; |
1433 | |
1434 | ifmgd = &sdata->u.mgd; |
1435 | |
1436 | ASSERT_MGD_MTX(ifmgd); |
1437 | |
1438 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
1439 | return; /* ignore ProbeResp to foreign address */ |
1440 | |
1441 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1442 | if (baselen > len) |
1443 | return; |
1444 | |
1445 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
1446 | &elems); |
1447 | |
1448 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
1449 | |
1450 | if (ifmgd->associated && |
1451 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
1452 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1453 | IEEE80211_STA_CONNECTION_POLL)) { |
1454 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
1455 | IEEE80211_STA_BEACON_POLL); |
1456 | mutex_lock(&sdata->local->iflist_mtx); |
1457 | ieee80211_recalc_ps(sdata->local, -1); |
1458 | mutex_unlock(&sdata->local->iflist_mtx); |
1459 | |
1460 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1461 | return; |
1462 | |
1463 | /* |
1464 | * We've received a probe response, but are not sure whether |
1465 | * we have or will be receiving any beacons or data, so let's |
1466 | * schedule the timers again, just in case. |
1467 | */ |
1468 | mod_beacon_timer(sdata); |
1469 | |
1470 | mod_timer(&ifmgd->conn_mon_timer, |
1471 | round_jiffies_up(jiffies + |
1472 | IEEE80211_CONNECTION_IDLE_TIME)); |
1473 | } |
1474 | } |
1475 | |
1476 | /* |
1477 | * This is the canonical list of information elements we care about, |
1478 | * the filter code also gives us all changes to the Microsoft OUI |
1479 | * (00:50:F2) vendor IE which is used for WMM which we need to track. |
1480 | * |
1481 | * We implement beacon filtering in software since that means we can |
1482 | * avoid processing the frame here and in cfg80211, and userspace |
1483 | * will not be able to tell whether the hardware supports it or not. |
1484 | * |
1485 | * XXX: This list needs to be dynamic -- userspace needs to be able to |
1486 | * add items it requires. It also needs to be able to tell us to |
1487 | * look out for other vendor IEs. |
1488 | */ |
1489 | static const u64 care_about_ies = |
1490 | (1ULL << WLAN_EID_COUNTRY) | |
1491 | (1ULL << WLAN_EID_ERP_INFO) | |
1492 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
1493 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
1494 | (1ULL << WLAN_EID_HT_CAPABILITY) | |
1495 | (1ULL << WLAN_EID_HT_INFORMATION); |
1496 | |
1497 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
1498 | struct ieee80211_mgmt *mgmt, |
1499 | size_t len, |
1500 | struct ieee80211_rx_status *rx_status) |
1501 | { |
1502 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1503 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
1504 | size_t baselen; |
1505 | struct ieee802_11_elems elems; |
1506 | struct ieee80211_local *local = sdata->local; |
1507 | u32 changed = 0; |
1508 | bool erp_valid, directed_tim = false; |
1509 | u8 erp_value = 0; |
1510 | u32 ncrc; |
1511 | u8 *bssid; |
1512 | |
1513 | ASSERT_MGD_MTX(ifmgd); |
1514 | |
1515 | /* Process beacon from the current BSS */ |
1516 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
1517 | if (baselen > len) |
1518 | return; |
1519 | |
1520 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1521 | return; |
1522 | |
1523 | /* |
1524 | * We might have received a number of frames, among them a |
1525 | * disassoc frame and a beacon... |
1526 | */ |
1527 | if (!ifmgd->associated) |
1528 | return; |
1529 | |
1530 | bssid = ifmgd->associated->bssid; |
1531 | |
1532 | /* |
1533 | * And in theory even frames from a different AP we were just |
1534 | * associated to a split-second ago! |
1535 | */ |
1536 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) |
1537 | return; |
1538 | |
1539 | /* Track average RSSI from the Beacon frames of the current AP */ |
1540 | ifmgd->last_beacon_signal = rx_status->signal; |
1541 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { |
1542 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; |
1543 | ifmgd->ave_beacon_signal = rx_status->signal; |
1544 | ifmgd->last_cqm_event_signal = 0; |
1545 | } else { |
1546 | ifmgd->ave_beacon_signal = |
1547 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + |
1548 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * |
1549 | ifmgd->ave_beacon_signal) / 16; |
1550 | } |
1551 | if (bss_conf->cqm_rssi_thold && |
1552 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) { |
1553 | int sig = ifmgd->ave_beacon_signal / 16; |
1554 | int last_event = ifmgd->last_cqm_event_signal; |
1555 | int thold = bss_conf->cqm_rssi_thold; |
1556 | int hyst = bss_conf->cqm_rssi_hyst; |
1557 | if (sig < thold && |
1558 | (last_event == 0 || sig < last_event - hyst)) { |
1559 | ifmgd->last_cqm_event_signal = sig; |
1560 | ieee80211_cqm_rssi_notify( |
1561 | &sdata->vif, |
1562 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, |
1563 | GFP_KERNEL); |
1564 | } else if (sig > thold && |
1565 | (last_event == 0 || sig > last_event + hyst)) { |
1566 | ifmgd->last_cqm_event_signal = sig; |
1567 | ieee80211_cqm_rssi_notify( |
1568 | &sdata->vif, |
1569 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, |
1570 | GFP_KERNEL); |
1571 | } |
1572 | } |
1573 | |
1574 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
1575 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1576 | if (net_ratelimit()) { |
1577 | printk(KERN_DEBUG "%s: cancelling probereq poll due " |
1578 | "to a received beacon\n", sdata->name); |
1579 | } |
1580 | #endif |
1581 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
1582 | mutex_lock(&local->iflist_mtx); |
1583 | ieee80211_recalc_ps(local, -1); |
1584 | mutex_unlock(&local->iflist_mtx); |
1585 | } |
1586 | |
1587 | /* |
1588 | * Push the beacon loss detection into the future since |
1589 | * we are processing a beacon from the AP just now. |
1590 | */ |
1591 | mod_beacon_timer(sdata); |
1592 | |
1593 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1594 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, |
1595 | len - baselen, &elems, |
1596 | care_about_ies, ncrc); |
1597 | |
1598 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1599 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1600 | ifmgd->aid); |
1601 | |
1602 | if (ncrc != ifmgd->beacon_crc) { |
1603 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
1604 | true); |
1605 | |
1606 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
1607 | elems.wmm_param_len); |
1608 | } |
1609 | |
1610 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1611 | if (directed_tim) { |
1612 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1613 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
1614 | ieee80211_hw_config(local, |
1615 | IEEE80211_CONF_CHANGE_PS); |
1616 | ieee80211_send_nullfunc(local, sdata, 0); |
1617 | } else { |
1618 | local->pspolling = true; |
1619 | |
1620 | /* |
1621 | * Here is assumed that the driver will be |
1622 | * able to send ps-poll frame and receive a |
1623 | * response even though power save mode is |
1624 | * enabled, but some drivers might require |
1625 | * to disable power save here. This needs |
1626 | * to be investigated. |
1627 | */ |
1628 | ieee80211_send_pspoll(local, sdata); |
1629 | } |
1630 | } |
1631 | } |
1632 | |
1633 | if (ncrc == ifmgd->beacon_crc) |
1634 | return; |
1635 | ifmgd->beacon_crc = ncrc; |
1636 | |
1637 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1638 | erp_valid = true; |
1639 | erp_value = elems.erp_info[0]; |
1640 | } else { |
1641 | erp_valid = false; |
1642 | } |
1643 | changed |= ieee80211_handle_bss_capability(sdata, |
1644 | le16_to_cpu(mgmt->u.beacon.capab_info), |
1645 | erp_valid, erp_value); |
1646 | |
1647 | |
1648 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
1649 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
1650 | struct sta_info *sta; |
1651 | struct ieee80211_supported_band *sband; |
1652 | u16 ap_ht_cap_flags; |
1653 | |
1654 | rcu_read_lock(); |
1655 | |
1656 | sta = sta_info_get(sdata, bssid); |
1657 | if (WARN_ON(!sta)) { |
1658 | rcu_read_unlock(); |
1659 | return; |
1660 | } |
1661 | |
1662 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1663 | |
1664 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
1665 | elems.ht_cap_elem, &sta->sta.ht_cap); |
1666 | |
1667 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
1668 | |
1669 | rcu_read_unlock(); |
1670 | |
1671 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1672 | bssid, ap_ht_cap_flags); |
1673 | } |
1674 | |
1675 | /* Note: country IE parsing is done for us by cfg80211 */ |
1676 | if (elems.country_elem) { |
1677 | /* TODO: IBSS also needs this */ |
1678 | if (elems.pwr_constr_elem) |
1679 | ieee80211_handle_pwr_constr(sdata, |
1680 | le16_to_cpu(mgmt->u.probe_resp.capab_info), |
1681 | elems.pwr_constr_elem, |
1682 | elems.pwr_constr_elem_len); |
1683 | } |
1684 | |
1685 | ieee80211_bss_info_change_notify(sdata, changed); |
1686 | } |
1687 | |
1688 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1689 | struct sk_buff *skb) |
1690 | { |
1691 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1692 | struct ieee80211_rx_status *rx_status; |
1693 | struct ieee80211_mgmt *mgmt; |
1694 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
1695 | u16 fc; |
1696 | |
1697 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1698 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1699 | fc = le16_to_cpu(mgmt->frame_control); |
1700 | |
1701 | mutex_lock(&ifmgd->mtx); |
1702 | |
1703 | if (ifmgd->associated && |
1704 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
1705 | switch (fc & IEEE80211_FCTL_STYPE) { |
1706 | case IEEE80211_STYPE_BEACON: |
1707 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
1708 | rx_status); |
1709 | break; |
1710 | case IEEE80211_STYPE_PROBE_RESP: |
1711 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
1712 | break; |
1713 | case IEEE80211_STYPE_DEAUTH: |
1714 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
1715 | break; |
1716 | case IEEE80211_STYPE_DISASSOC: |
1717 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
1718 | break; |
1719 | case IEEE80211_STYPE_ACTION: |
1720 | switch (mgmt->u.action.category) { |
1721 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1722 | ieee80211_sta_process_chanswitch(sdata, |
1723 | &mgmt->u.action.u.chan_switch.sw_elem, |
1724 | (void *)ifmgd->associated->priv, |
1725 | rx_status->mactime); |
1726 | break; |
1727 | } |
1728 | } |
1729 | mutex_unlock(&ifmgd->mtx); |
1730 | |
1731 | switch (rma) { |
1732 | case RX_MGMT_NONE: |
1733 | /* no action */ |
1734 | break; |
1735 | case RX_MGMT_CFG80211_DEAUTH: |
1736 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
1737 | break; |
1738 | case RX_MGMT_CFG80211_DISASSOC: |
1739 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
1740 | break; |
1741 | default: |
1742 | WARN(1, "unexpected: %d", rma); |
1743 | } |
1744 | return; |
1745 | } |
1746 | |
1747 | mutex_unlock(&ifmgd->mtx); |
1748 | |
1749 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
1750 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) { |
1751 | struct ieee80211_local *local = sdata->local; |
1752 | struct ieee80211_work *wk; |
1753 | |
1754 | mutex_lock(&local->work_mtx); |
1755 | list_for_each_entry(wk, &local->work_list, list) { |
1756 | if (wk->sdata != sdata) |
1757 | continue; |
1758 | |
1759 | if (wk->type != IEEE80211_WORK_ASSOC && |
1760 | wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) |
1761 | continue; |
1762 | |
1763 | if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN)) |
1764 | continue; |
1765 | if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN)) |
1766 | continue; |
1767 | |
1768 | /* |
1769 | * Printing the message only here means we can't |
1770 | * spuriously print it, but it also means that it |
1771 | * won't be printed when the frame comes in before |
1772 | * we even tried to associate or in similar cases. |
1773 | * |
1774 | * Ultimately, I suspect cfg80211 should print the |
1775 | * messages instead. |
1776 | */ |
1777 | printk(KERN_DEBUG |
1778 | "%s: deauthenticated from %pM (Reason: %u)\n", |
1779 | sdata->name, mgmt->bssid, |
1780 | le16_to_cpu(mgmt->u.deauth.reason_code)); |
1781 | |
1782 | list_del_rcu(&wk->list); |
1783 | free_work(wk); |
1784 | break; |
1785 | } |
1786 | mutex_unlock(&local->work_mtx); |
1787 | |
1788 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
1789 | } |
1790 | } |
1791 | |
1792 | static void ieee80211_sta_timer(unsigned long data) |
1793 | { |
1794 | struct ieee80211_sub_if_data *sdata = |
1795 | (struct ieee80211_sub_if_data *) data; |
1796 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1797 | struct ieee80211_local *local = sdata->local; |
1798 | |
1799 | if (local->quiescing) { |
1800 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
1801 | return; |
1802 | } |
1803 | |
1804 | ieee80211_queue_work(&local->hw, &sdata->work); |
1805 | } |
1806 | |
1807 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
1808 | { |
1809 | struct ieee80211_local *local = sdata->local; |
1810 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1811 | |
1812 | /* then process the rest of the work */ |
1813 | mutex_lock(&ifmgd->mtx); |
1814 | |
1815 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1816 | IEEE80211_STA_CONNECTION_POLL) && |
1817 | ifmgd->associated) { |
1818 | u8 bssid[ETH_ALEN]; |
1819 | |
1820 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
1821 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1822 | run_again(ifmgd, ifmgd->probe_timeout); |
1823 | |
1824 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { |
1825 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1826 | printk(KERN_DEBUG "No probe response from AP %pM" |
1827 | " after %dms, try %d\n", bssid, |
1828 | (1000 * IEEE80211_PROBE_WAIT)/HZ, |
1829 | ifmgd->probe_send_count); |
1830 | #endif |
1831 | ieee80211_mgd_probe_ap_send(sdata); |
1832 | } else { |
1833 | /* |
1834 | * We actually lost the connection ... or did we? |
1835 | * Let's make sure! |
1836 | */ |
1837 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
1838 | IEEE80211_STA_BEACON_POLL); |
1839 | printk(KERN_DEBUG "No probe response from AP %pM" |
1840 | " after %dms, disconnecting.\n", |
1841 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); |
1842 | ieee80211_set_disassoc(sdata, true); |
1843 | ieee80211_recalc_idle(local); |
1844 | mutex_unlock(&ifmgd->mtx); |
1845 | /* |
1846 | * must be outside lock due to cfg80211, |
1847 | * but that's not a problem. |
1848 | */ |
1849 | ieee80211_send_deauth_disassoc(sdata, bssid, |
1850 | IEEE80211_STYPE_DEAUTH, |
1851 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
1852 | NULL, true); |
1853 | mutex_lock(&ifmgd->mtx); |
1854 | } |
1855 | } |
1856 | |
1857 | mutex_unlock(&ifmgd->mtx); |
1858 | } |
1859 | |
1860 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1861 | { |
1862 | struct ieee80211_sub_if_data *sdata = |
1863 | (struct ieee80211_sub_if_data *) data; |
1864 | struct ieee80211_local *local = sdata->local; |
1865 | |
1866 | if (local->quiescing) |
1867 | return; |
1868 | |
1869 | ieee80211_queue_work(&sdata->local->hw, |
1870 | &sdata->u.mgd.beacon_connection_loss_work); |
1871 | } |
1872 | |
1873 | static void ieee80211_sta_conn_mon_timer(unsigned long data) |
1874 | { |
1875 | struct ieee80211_sub_if_data *sdata = |
1876 | (struct ieee80211_sub_if_data *) data; |
1877 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1878 | struct ieee80211_local *local = sdata->local; |
1879 | |
1880 | if (local->quiescing) |
1881 | return; |
1882 | |
1883 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
1884 | } |
1885 | |
1886 | static void ieee80211_sta_monitor_work(struct work_struct *work) |
1887 | { |
1888 | struct ieee80211_sub_if_data *sdata = |
1889 | container_of(work, struct ieee80211_sub_if_data, |
1890 | u.mgd.monitor_work); |
1891 | |
1892 | ieee80211_mgd_probe_ap(sdata, false); |
1893 | } |
1894 | |
1895 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1896 | { |
1897 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
1898 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1899 | IEEE80211_STA_CONNECTION_POLL); |
1900 | |
1901 | /* let's probe the connection once */ |
1902 | ieee80211_queue_work(&sdata->local->hw, |
1903 | &sdata->u.mgd.monitor_work); |
1904 | /* and do all the other regular work too */ |
1905 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
1906 | } |
1907 | } |
1908 | |
1909 | #ifdef CONFIG_PM |
1910 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) |
1911 | { |
1912 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1913 | |
1914 | /* |
1915 | * we need to use atomic bitops for the running bits |
1916 | * only because both timers might fire at the same |
1917 | * time -- the code here is properly synchronised. |
1918 | */ |
1919 | |
1920 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
1921 | if (del_timer_sync(&ifmgd->timer)) |
1922 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
1923 | |
1924 | cancel_work_sync(&ifmgd->chswitch_work); |
1925 | if (del_timer_sync(&ifmgd->chswitch_timer)) |
1926 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
1927 | |
1928 | cancel_work_sync(&ifmgd->monitor_work); |
1929 | /* these will just be re-established on connection */ |
1930 | del_timer_sync(&ifmgd->conn_mon_timer); |
1931 | del_timer_sync(&ifmgd->bcn_mon_timer); |
1932 | } |
1933 | |
1934 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
1935 | { |
1936 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1937 | |
1938 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
1939 | add_timer(&ifmgd->timer); |
1940 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) |
1941 | add_timer(&ifmgd->chswitch_timer); |
1942 | } |
1943 | #endif |
1944 | |
1945 | /* interface setup */ |
1946 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1947 | { |
1948 | struct ieee80211_if_managed *ifmgd; |
1949 | |
1950 | ifmgd = &sdata->u.mgd; |
1951 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
1952 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1953 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
1954 | ieee80211_beacon_connection_loss_work); |
1955 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
1956 | (unsigned long) sdata); |
1957 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1958 | (unsigned long) sdata); |
1959 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, |
1960 | (unsigned long) sdata); |
1961 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
1962 | (unsigned long) sdata); |
1963 | |
1964 | ifmgd->flags = 0; |
1965 | |
1966 | mutex_init(&ifmgd->mtx); |
1967 | |
1968 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) |
1969 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; |
1970 | else |
1971 | ifmgd->req_smps = IEEE80211_SMPS_OFF; |
1972 | } |
1973 | |
1974 | /* scan finished notification */ |
1975 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
1976 | { |
1977 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
1978 | |
1979 | /* Restart STA timers */ |
1980 | rcu_read_lock(); |
1981 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
1982 | ieee80211_restart_sta_timer(sdata); |
1983 | rcu_read_unlock(); |
1984 | } |
1985 | |
1986 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1987 | unsigned long data, void *dummy) |
1988 | { |
1989 | s32 latency_usec = (s32) data; |
1990 | struct ieee80211_local *local = |
1991 | container_of(nb, struct ieee80211_local, |
1992 | network_latency_notifier); |
1993 | |
1994 | mutex_lock(&local->iflist_mtx); |
1995 | ieee80211_recalc_ps(local, latency_usec); |
1996 | mutex_unlock(&local->iflist_mtx); |
1997 | |
1998 | return 0; |
1999 | } |
2000 | |
2001 | /* config hooks */ |
2002 | static enum work_done_result |
2003 | ieee80211_probe_auth_done(struct ieee80211_work *wk, |
2004 | struct sk_buff *skb) |
2005 | { |
2006 | if (!skb) { |
2007 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); |
2008 | return WORK_DONE_DESTROY; |
2009 | } |
2010 | |
2011 | if (wk->type == IEEE80211_WORK_AUTH) { |
2012 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); |
2013 | return WORK_DONE_DESTROY; |
2014 | } |
2015 | |
2016 | mutex_lock(&wk->sdata->u.mgd.mtx); |
2017 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); |
2018 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
2019 | |
2020 | wk->type = IEEE80211_WORK_AUTH; |
2021 | wk->probe_auth.tries = 0; |
2022 | return WORK_DONE_REQUEUE; |
2023 | } |
2024 | |
2025 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
2026 | struct cfg80211_auth_request *req) |
2027 | { |
2028 | const u8 *ssid; |
2029 | struct ieee80211_work *wk; |
2030 | u16 auth_alg; |
2031 | |
2032 | if (req->local_state_change) |
2033 | return 0; /* no need to update mac80211 state */ |
2034 | |
2035 | switch (req->auth_type) { |
2036 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
2037 | auth_alg = WLAN_AUTH_OPEN; |
2038 | break; |
2039 | case NL80211_AUTHTYPE_SHARED_KEY: |
2040 | if (IS_ERR(sdata->local->wep_tx_tfm)) |
2041 | return -EOPNOTSUPP; |
2042 | auth_alg = WLAN_AUTH_SHARED_KEY; |
2043 | break; |
2044 | case NL80211_AUTHTYPE_FT: |
2045 | auth_alg = WLAN_AUTH_FT; |
2046 | break; |
2047 | case NL80211_AUTHTYPE_NETWORK_EAP: |
2048 | auth_alg = WLAN_AUTH_LEAP; |
2049 | break; |
2050 | default: |
2051 | return -EOPNOTSUPP; |
2052 | } |
2053 | |
2054 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
2055 | if (!wk) |
2056 | return -ENOMEM; |
2057 | |
2058 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
2059 | |
2060 | if (req->ie && req->ie_len) { |
2061 | memcpy(wk->ie, req->ie, req->ie_len); |
2062 | wk->ie_len = req->ie_len; |
2063 | } |
2064 | |
2065 | if (req->key && req->key_len) { |
2066 | wk->probe_auth.key_len = req->key_len; |
2067 | wk->probe_auth.key_idx = req->key_idx; |
2068 | memcpy(wk->probe_auth.key, req->key, req->key_len); |
2069 | } |
2070 | |
2071 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
2072 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
2073 | wk->probe_auth.ssid_len = ssid[1]; |
2074 | |
2075 | wk->probe_auth.algorithm = auth_alg; |
2076 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; |
2077 | |
2078 | /* if we already have a probe, don't probe again */ |
2079 | if (req->bss->proberesp_ies) |
2080 | wk->type = IEEE80211_WORK_AUTH; |
2081 | else |
2082 | wk->type = IEEE80211_WORK_DIRECT_PROBE; |
2083 | wk->chan = req->bss->channel; |
2084 | wk->sdata = sdata; |
2085 | wk->done = ieee80211_probe_auth_done; |
2086 | |
2087 | ieee80211_add_work(wk); |
2088 | return 0; |
2089 | } |
2090 | |
2091 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
2092 | struct sk_buff *skb) |
2093 | { |
2094 | struct ieee80211_mgmt *mgmt; |
2095 | struct ieee80211_rx_status *rx_status; |
2096 | struct ieee802_11_elems elems; |
2097 | u16 status; |
2098 | |
2099 | if (!skb) { |
2100 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); |
2101 | return WORK_DONE_DESTROY; |
2102 | } |
2103 | |
2104 | if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) { |
2105 | mutex_lock(&wk->sdata->u.mgd.mtx); |
2106 | rx_status = (void *) skb->cb; |
2107 | ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems); |
2108 | ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status, |
2109 | &elems, true); |
2110 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
2111 | |
2112 | wk->type = IEEE80211_WORK_ASSOC; |
2113 | /* not really done yet */ |
2114 | return WORK_DONE_REQUEUE; |
2115 | } |
2116 | |
2117 | mgmt = (void *)skb->data; |
2118 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
2119 | |
2120 | if (status == WLAN_STATUS_SUCCESS) { |
2121 | mutex_lock(&wk->sdata->u.mgd.mtx); |
2122 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { |
2123 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
2124 | /* oops -- internal error -- send timeout for now */ |
2125 | cfg80211_send_assoc_timeout(wk->sdata->dev, |
2126 | wk->filter_ta); |
2127 | return WORK_DONE_DESTROY; |
2128 | } |
2129 | |
2130 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
2131 | } |
2132 | |
2133 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); |
2134 | return WORK_DONE_DESTROY; |
2135 | } |
2136 | |
2137 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
2138 | struct cfg80211_assoc_request *req) |
2139 | { |
2140 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2141 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
2142 | struct ieee80211_work *wk; |
2143 | const u8 *ssid; |
2144 | int i; |
2145 | |
2146 | mutex_lock(&ifmgd->mtx); |
2147 | if (ifmgd->associated) { |
2148 | if (!req->prev_bssid || |
2149 | memcmp(req->prev_bssid, ifmgd->associated->bssid, |
2150 | ETH_ALEN)) { |
2151 | /* |
2152 | * We are already associated and the request was not a |
2153 | * reassociation request from the current BSS, so |
2154 | * reject it. |
2155 | */ |
2156 | mutex_unlock(&ifmgd->mtx); |
2157 | return -EALREADY; |
2158 | } |
2159 | |
2160 | /* Trying to reassociate - clear previous association state */ |
2161 | ieee80211_set_disassoc(sdata, true); |
2162 | } |
2163 | mutex_unlock(&ifmgd->mtx); |
2164 | |
2165 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
2166 | if (!wk) |
2167 | return -ENOMEM; |
2168 | |
2169 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
2170 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
2171 | |
2172 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
2173 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
2174 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
2175 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) |
2176 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
2177 | |
2178 | |
2179 | if (req->ie && req->ie_len) { |
2180 | memcpy(wk->ie, req->ie, req->ie_len); |
2181 | wk->ie_len = req->ie_len; |
2182 | } else |
2183 | wk->ie_len = 0; |
2184 | |
2185 | wk->assoc.bss = req->bss; |
2186 | |
2187 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
2188 | |
2189 | /* new association always uses requested smps mode */ |
2190 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
2191 | if (ifmgd->powersave) |
2192 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; |
2193 | else |
2194 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; |
2195 | } else |
2196 | ifmgd->ap_smps = ifmgd->req_smps; |
2197 | |
2198 | wk->assoc.smps = ifmgd->ap_smps; |
2199 | /* |
2200 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. |
2201 | * We still associate in non-HT mode (11a/b/g) if any one of these |
2202 | * ciphers is configured as pairwise. |
2203 | * We can set this to true for non-11n hardware, that'll be checked |
2204 | * separately along with the peer capabilities. |
2205 | */ |
2206 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
2207 | wk->assoc.capability = req->bss->capability; |
2208 | wk->assoc.wmm_used = bss->wmm_used; |
2209 | wk->assoc.supp_rates = bss->supp_rates; |
2210 | wk->assoc.supp_rates_len = bss->supp_rates_len; |
2211 | wk->assoc.ht_information_ie = |
2212 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); |
2213 | |
2214 | if (bss->wmm_used && bss->uapsd_supported && |
2215 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { |
2216 | wk->assoc.uapsd_used = true; |
2217 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
2218 | } else { |
2219 | wk->assoc.uapsd_used = false; |
2220 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
2221 | } |
2222 | |
2223 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
2224 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
2225 | wk->assoc.ssid_len = ssid[1]; |
2226 | |
2227 | if (req->prev_bssid) |
2228 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
2229 | |
2230 | wk->chan = req->bss->channel; |
2231 | wk->sdata = sdata; |
2232 | wk->done = ieee80211_assoc_done; |
2233 | if (!bss->dtim_period && |
2234 | sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) |
2235 | wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT; |
2236 | else |
2237 | wk->type = IEEE80211_WORK_ASSOC; |
2238 | |
2239 | if (req->use_mfp) { |
2240 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; |
2241 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; |
2242 | } else { |
2243 | ifmgd->mfp = IEEE80211_MFP_DISABLED; |
2244 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; |
2245 | } |
2246 | |
2247 | if (req->crypto.control_port) |
2248 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; |
2249 | else |
2250 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; |
2251 | |
2252 | ieee80211_add_work(wk); |
2253 | return 0; |
2254 | } |
2255 | |
2256 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
2257 | struct cfg80211_deauth_request *req, |
2258 | void *cookie) |
2259 | { |
2260 | struct ieee80211_local *local = sdata->local; |
2261 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2262 | struct ieee80211_work *wk; |
2263 | u8 bssid[ETH_ALEN]; |
2264 | bool assoc_bss = false; |
2265 | |
2266 | mutex_lock(&ifmgd->mtx); |
2267 | |
2268 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
2269 | if (ifmgd->associated == req->bss) { |
2270 | ieee80211_set_disassoc(sdata, false); |
2271 | mutex_unlock(&ifmgd->mtx); |
2272 | assoc_bss = true; |
2273 | } else { |
2274 | bool not_auth_yet = false; |
2275 | |
2276 | mutex_unlock(&ifmgd->mtx); |
2277 | |
2278 | mutex_lock(&local->work_mtx); |
2279 | list_for_each_entry(wk, &local->work_list, list) { |
2280 | if (wk->sdata != sdata) |
2281 | continue; |
2282 | |
2283 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE && |
2284 | wk->type != IEEE80211_WORK_AUTH && |
2285 | wk->type != IEEE80211_WORK_ASSOC && |
2286 | wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) |
2287 | continue; |
2288 | |
2289 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) |
2290 | continue; |
2291 | |
2292 | not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE; |
2293 | list_del_rcu(&wk->list); |
2294 | free_work(wk); |
2295 | break; |
2296 | } |
2297 | mutex_unlock(&local->work_mtx); |
2298 | |
2299 | /* |
2300 | * If somebody requests authentication and we haven't |
2301 | * sent out an auth frame yet there's no need to send |
2302 | * out a deauth frame either. If the state was PROBE, |
2303 | * then this is the case. If it's AUTH we have sent a |
2304 | * frame, and if it's IDLE we have completed the auth |
2305 | * process already. |
2306 | */ |
2307 | if (not_auth_yet) { |
2308 | __cfg80211_auth_canceled(sdata->dev, bssid); |
2309 | return 0; |
2310 | } |
2311 | } |
2312 | |
2313 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
2314 | sdata->name, bssid, req->reason_code); |
2315 | |
2316 | ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH, |
2317 | req->reason_code, cookie, |
2318 | !req->local_state_change); |
2319 | if (assoc_bss) |
2320 | sta_info_destroy_addr(sdata, bssid); |
2321 | |
2322 | ieee80211_recalc_idle(sdata->local); |
2323 | |
2324 | return 0; |
2325 | } |
2326 | |
2327 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
2328 | struct cfg80211_disassoc_request *req, |
2329 | void *cookie) |
2330 | { |
2331 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2332 | u8 bssid[ETH_ALEN]; |
2333 | |
2334 | mutex_lock(&ifmgd->mtx); |
2335 | |
2336 | /* |
2337 | * cfg80211 should catch this ... but it's racy since |
2338 | * we can receive a disassoc frame, process it, hand it |
2339 | * to cfg80211 while that's in a locked section already |
2340 | * trying to tell us that the user wants to disconnect. |
2341 | */ |
2342 | if (ifmgd->associated != req->bss) { |
2343 | mutex_unlock(&ifmgd->mtx); |
2344 | return -ENOLINK; |
2345 | } |
2346 | |
2347 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
2348 | sdata->name, req->bss->bssid, req->reason_code); |
2349 | |
2350 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
2351 | ieee80211_set_disassoc(sdata, false); |
2352 | |
2353 | mutex_unlock(&ifmgd->mtx); |
2354 | |
2355 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
2356 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
2357 | cookie, !req->local_state_change); |
2358 | sta_info_destroy_addr(sdata, bssid); |
2359 | |
2360 | ieee80211_recalc_idle(sdata->local); |
2361 | |
2362 | return 0; |
2363 | } |
2364 | |
2365 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
2366 | enum nl80211_cqm_rssi_threshold_event rssi_event, |
2367 | gfp_t gfp) |
2368 | { |
2369 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
2370 | |
2371 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
2372 | |
2373 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
2374 | } |
2375 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |
2376 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9