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1 | /* |
2 | * BSS client mode implementation |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
8 | * |
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 | #define TMR_RUNNING_TIMER 0 |
51 | #define TMR_RUNNING_CHANSW 1 |
52 | |
53 | /* |
54 | * All cfg80211 functions have to be called outside a locked |
55 | * section so that they can acquire a lock themselves... This |
56 | * is much simpler than queuing up things in cfg80211, but we |
57 | * do need some indirection for that here. |
58 | */ |
59 | enum rx_mgmt_action { |
60 | /* no action required */ |
61 | RX_MGMT_NONE, |
62 | |
63 | /* caller must call cfg80211_send_rx_auth() */ |
64 | RX_MGMT_CFG80211_AUTH, |
65 | |
66 | /* caller must call cfg80211_send_rx_assoc() */ |
67 | RX_MGMT_CFG80211_ASSOC, |
68 | |
69 | /* caller must call cfg80211_send_deauth() */ |
70 | RX_MGMT_CFG80211_DEAUTH, |
71 | |
72 | /* caller must call cfg80211_send_disassoc() */ |
73 | RX_MGMT_CFG80211_DISASSOC, |
74 | |
75 | /* caller must tell cfg80211 about internal error */ |
76 | RX_MGMT_CFG80211_ASSOC_ERROR, |
77 | }; |
78 | |
79 | /* utils */ |
80 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
81 | { |
82 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); |
83 | } |
84 | |
85 | /* |
86 | * We can have multiple work items (and connection probing) |
87 | * scheduling this timer, but we need to take care to only |
88 | * reschedule it when it should fire _earlier_ than it was |
89 | * asked for before, or if it's not pending right now. This |
90 | * function ensures that. Note that it then is required to |
91 | * run this function for all timeouts after the first one |
92 | * has happened -- the work that runs from this timer will |
93 | * do that. |
94 | */ |
95 | static void run_again(struct ieee80211_if_managed *ifmgd, |
96 | unsigned long timeout) |
97 | { |
98 | ASSERT_MGD_MTX(ifmgd); |
99 | |
100 | if (!timer_pending(&ifmgd->timer) || |
101 | time_before(timeout, ifmgd->timer.expires)) |
102 | mod_timer(&ifmgd->timer, timeout); |
103 | } |
104 | |
105 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
106 | { |
107 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) |
108 | return; |
109 | |
110 | mod_timer(&sdata->u.mgd.bcn_mon_timer, |
111 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); |
112 | } |
113 | |
114 | static int ecw2cw(int ecw) |
115 | { |
116 | return (1 << ecw) - 1; |
117 | } |
118 | |
119 | /* |
120 | * ieee80211_enable_ht should be called only after the operating band |
121 | * has been determined as ht configuration depends on the hw's |
122 | * HT abilities for a specific band. |
123 | */ |
124 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, |
125 | struct ieee80211_ht_info *hti, |
126 | const u8 *bssid, u16 ap_ht_cap_flags) |
127 | { |
128 | struct ieee80211_local *local = sdata->local; |
129 | struct ieee80211_supported_band *sband; |
130 | struct sta_info *sta; |
131 | u32 changed = 0; |
132 | u16 ht_opmode; |
133 | bool enable_ht = true, ht_changed; |
134 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
135 | |
136 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
137 | |
138 | /* HT is not supported */ |
139 | if (!sband->ht_cap.ht_supported) |
140 | enable_ht = false; |
141 | |
142 | /* check that channel matches the right operating channel */ |
143 | if (local->hw.conf.channel->center_freq != |
144 | ieee80211_channel_to_frequency(hti->control_chan)) |
145 | enable_ht = false; |
146 | |
147 | if (enable_ht) { |
148 | channel_type = NL80211_CHAN_HT20; |
149 | |
150 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && |
151 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && |
152 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { |
153 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
154 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
155 | if (!(local->hw.conf.channel->flags & |
156 | IEEE80211_CHAN_NO_HT40PLUS)) |
157 | channel_type = NL80211_CHAN_HT40PLUS; |
158 | break; |
159 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
160 | if (!(local->hw.conf.channel->flags & |
161 | IEEE80211_CHAN_NO_HT40MINUS)) |
162 | channel_type = NL80211_CHAN_HT40MINUS; |
163 | break; |
164 | } |
165 | } |
166 | } |
167 | |
168 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || |
169 | channel_type != local->hw.conf.channel_type; |
170 | |
171 | if (local->tmp_channel) |
172 | local->tmp_channel_type = channel_type; |
173 | local->oper_channel_type = channel_type; |
174 | |
175 | if (ht_changed) { |
176 | /* channel_type change automatically detected */ |
177 | ieee80211_hw_config(local, 0); |
178 | |
179 | rcu_read_lock(); |
180 | sta = sta_info_get(sdata, bssid); |
181 | if (sta) |
182 | rate_control_rate_update(local, sband, sta, |
183 | IEEE80211_RC_HT_CHANGED, |
184 | local->oper_channel_type); |
185 | rcu_read_unlock(); |
186 | } |
187 | |
188 | /* disable HT */ |
189 | if (!enable_ht) |
190 | return 0; |
191 | |
192 | ht_opmode = le16_to_cpu(hti->operation_mode); |
193 | |
194 | /* if bss configuration changed store the new one */ |
195 | if (!sdata->ht_opmode_valid || |
196 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { |
197 | changed |= BSS_CHANGED_HT; |
198 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
199 | sdata->ht_opmode_valid = true; |
200 | } |
201 | |
202 | return changed; |
203 | } |
204 | |
205 | /* frame sending functions */ |
206 | |
207 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
208 | const u8 *bssid, u16 stype, u16 reason, |
209 | void *cookie) |
210 | { |
211 | struct ieee80211_local *local = sdata->local; |
212 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
213 | struct sk_buff *skb; |
214 | struct ieee80211_mgmt *mgmt; |
215 | |
216 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
217 | if (!skb) { |
218 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
219 | "deauth/disassoc frame\n", sdata->name); |
220 | return; |
221 | } |
222 | skb_reserve(skb, local->hw.extra_tx_headroom); |
223 | |
224 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
225 | memset(mgmt, 0, 24); |
226 | memcpy(mgmt->da, bssid, ETH_ALEN); |
227 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
228 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
229 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
230 | skb_put(skb, 2); |
231 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
232 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
233 | |
234 | if (stype == IEEE80211_STYPE_DEAUTH) |
235 | if (cookie) |
236 | __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
237 | else |
238 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
239 | else |
240 | if (cookie) |
241 | __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
242 | else |
243 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
244 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
245 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
246 | ieee80211_tx_skb(sdata, skb); |
247 | } |
248 | |
249 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
250 | struct ieee80211_sub_if_data *sdata) |
251 | { |
252 | struct ieee80211_pspoll *pspoll; |
253 | struct sk_buff *skb; |
254 | |
255 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
256 | if (!skb) |
257 | return; |
258 | |
259 | pspoll = (struct ieee80211_pspoll *) skb->data; |
260 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
261 | |
262 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
263 | ieee80211_tx_skb(sdata, skb); |
264 | } |
265 | |
266 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
267 | struct ieee80211_sub_if_data *sdata, |
268 | int powersave) |
269 | { |
270 | struct sk_buff *skb; |
271 | struct ieee80211_hdr_3addr *nullfunc; |
272 | |
273 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
274 | if (!skb) |
275 | return; |
276 | |
277 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
278 | if (powersave) |
279 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
280 | |
281 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
282 | ieee80211_tx_skb(sdata, skb); |
283 | } |
284 | |
285 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
286 | struct ieee80211_sub_if_data *sdata) |
287 | { |
288 | struct sk_buff *skb; |
289 | struct ieee80211_hdr *nullfunc; |
290 | __le16 fc; |
291 | |
292 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
293 | return; |
294 | |
295 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); |
296 | if (!skb) { |
297 | printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr " |
298 | "nullfunc frame\n", sdata->name); |
299 | return; |
300 | } |
301 | skb_reserve(skb, local->hw.extra_tx_headroom); |
302 | |
303 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); |
304 | memset(nullfunc, 0, 30); |
305 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
306 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
307 | nullfunc->frame_control = fc; |
308 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); |
309 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); |
310 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); |
311 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); |
312 | |
313 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
314 | ieee80211_tx_skb(sdata, skb); |
315 | } |
316 | |
317 | /* spectrum management related things */ |
318 | static void ieee80211_chswitch_work(struct work_struct *work) |
319 | { |
320 | struct ieee80211_sub_if_data *sdata = |
321 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); |
322 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
323 | |
324 | if (!ieee80211_sdata_running(sdata)) |
325 | return; |
326 | |
327 | mutex_lock(&ifmgd->mtx); |
328 | if (!ifmgd->associated) |
329 | goto out; |
330 | |
331 | sdata->local->oper_channel = sdata->local->csa_channel; |
332 | ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
333 | |
334 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
335 | ifmgd->associated->channel = sdata->local->oper_channel; |
336 | |
337 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
338 | IEEE80211_QUEUE_STOP_REASON_CSA); |
339 | out: |
340 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; |
341 | mutex_unlock(&ifmgd->mtx); |
342 | } |
343 | |
344 | static void ieee80211_chswitch_timer(unsigned long data) |
345 | { |
346 | struct ieee80211_sub_if_data *sdata = |
347 | (struct ieee80211_sub_if_data *) data; |
348 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
349 | |
350 | if (sdata->local->quiescing) { |
351 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
352 | return; |
353 | } |
354 | |
355 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
356 | } |
357 | |
358 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
359 | struct ieee80211_channel_sw_ie *sw_elem, |
360 | struct ieee80211_bss *bss) |
361 | { |
362 | struct cfg80211_bss *cbss = |
363 | container_of((void *)bss, struct cfg80211_bss, priv); |
364 | struct ieee80211_channel *new_ch; |
365 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
366 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); |
367 | |
368 | ASSERT_MGD_MTX(ifmgd); |
369 | |
370 | if (!ifmgd->associated) |
371 | return; |
372 | |
373 | if (sdata->local->scanning) |
374 | return; |
375 | |
376 | /* Disregard subsequent beacons if we are already running a timer |
377 | processing a CSA */ |
378 | |
379 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) |
380 | return; |
381 | |
382 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); |
383 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) |
384 | return; |
385 | |
386 | sdata->local->csa_channel = new_ch; |
387 | |
388 | if (sw_elem->count <= 1) { |
389 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
390 | } else { |
391 | ieee80211_stop_queues_by_reason(&sdata->local->hw, |
392 | IEEE80211_QUEUE_STOP_REASON_CSA); |
393 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; |
394 | mod_timer(&ifmgd->chswitch_timer, |
395 | jiffies + |
396 | msecs_to_jiffies(sw_elem->count * |
397 | cbss->beacon_interval)); |
398 | } |
399 | } |
400 | |
401 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, |
402 | u16 capab_info, u8 *pwr_constr_elem, |
403 | u8 pwr_constr_elem_len) |
404 | { |
405 | struct ieee80211_conf *conf = &sdata->local->hw.conf; |
406 | |
407 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) |
408 | return; |
409 | |
410 | /* Power constraint IE length should be 1 octet */ |
411 | if (pwr_constr_elem_len != 1) |
412 | return; |
413 | |
414 | if ((*pwr_constr_elem <= conf->channel->max_power) && |
415 | (*pwr_constr_elem != sdata->local->power_constr_level)) { |
416 | sdata->local->power_constr_level = *pwr_constr_elem; |
417 | ieee80211_hw_config(sdata->local, 0); |
418 | } |
419 | } |
420 | |
421 | /* powersave */ |
422 | static void ieee80211_enable_ps(struct ieee80211_local *local, |
423 | struct ieee80211_sub_if_data *sdata) |
424 | { |
425 | struct ieee80211_conf *conf = &local->hw.conf; |
426 | |
427 | /* |
428 | * If we are scanning right now then the parameters will |
429 | * take effect when scan finishes. |
430 | */ |
431 | if (local->scanning) |
432 | return; |
433 | |
434 | if (conf->dynamic_ps_timeout > 0 && |
435 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { |
436 | mod_timer(&local->dynamic_ps_timer, jiffies + |
437 | msecs_to_jiffies(conf->dynamic_ps_timeout)); |
438 | } else { |
439 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
440 | ieee80211_send_nullfunc(local, sdata, 1); |
441 | |
442 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
443 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
444 | return; |
445 | |
446 | conf->flags |= IEEE80211_CONF_PS; |
447 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
448 | } |
449 | } |
450 | |
451 | static void ieee80211_change_ps(struct ieee80211_local *local) |
452 | { |
453 | struct ieee80211_conf *conf = &local->hw.conf; |
454 | |
455 | if (local->ps_sdata) { |
456 | ieee80211_enable_ps(local, local->ps_sdata); |
457 | } else if (conf->flags & IEEE80211_CONF_PS) { |
458 | conf->flags &= ~IEEE80211_CONF_PS; |
459 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
460 | del_timer_sync(&local->dynamic_ps_timer); |
461 | cancel_work_sync(&local->dynamic_ps_enable_work); |
462 | } |
463 | } |
464 | |
465 | /* need to hold RTNL or interface lock */ |
466 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
467 | { |
468 | struct ieee80211_sub_if_data *sdata, *found = NULL; |
469 | int count = 0; |
470 | |
471 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { |
472 | local->ps_sdata = NULL; |
473 | return; |
474 | } |
475 | |
476 | if (!list_empty(&local->work_list)) { |
477 | local->ps_sdata = NULL; |
478 | goto change; |
479 | } |
480 | |
481 | list_for_each_entry(sdata, &local->interfaces, list) { |
482 | if (!ieee80211_sdata_running(sdata)) |
483 | continue; |
484 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
485 | continue; |
486 | found = sdata; |
487 | count++; |
488 | } |
489 | |
490 | if (count == 1 && found->u.mgd.powersave && |
491 | found->u.mgd.associated && |
492 | found->u.mgd.associated->beacon_ies && |
493 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
494 | IEEE80211_STA_CONNECTION_POLL))) { |
495 | s32 beaconint_us; |
496 | |
497 | if (latency < 0) |
498 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); |
499 | |
500 | beaconint_us = ieee80211_tu_to_usec( |
501 | found->vif.bss_conf.beacon_int); |
502 | |
503 | if (beaconint_us > latency) { |
504 | local->ps_sdata = NULL; |
505 | } else { |
506 | struct ieee80211_bss *bss; |
507 | int maxslp = 1; |
508 | u8 dtimper; |
509 | |
510 | bss = (void *)found->u.mgd.associated->priv; |
511 | dtimper = bss->dtim_period; |
512 | |
513 | /* If the TIM IE is invalid, pretend the value is 1 */ |
514 | if (!dtimper) |
515 | dtimper = 1; |
516 | else if (dtimper > 1) |
517 | maxslp = min_t(int, dtimper, |
518 | latency / beaconint_us); |
519 | |
520 | local->hw.conf.max_sleep_period = maxslp; |
521 | local->hw.conf.ps_dtim_period = dtimper; |
522 | local->ps_sdata = found; |
523 | } |
524 | } else { |
525 | local->ps_sdata = NULL; |
526 | } |
527 | |
528 | change: |
529 | ieee80211_change_ps(local); |
530 | } |
531 | |
532 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) |
533 | { |
534 | struct ieee80211_local *local = |
535 | container_of(work, struct ieee80211_local, |
536 | dynamic_ps_disable_work); |
537 | |
538 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
539 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
540 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
541 | } |
542 | |
543 | ieee80211_wake_queues_by_reason(&local->hw, |
544 | IEEE80211_QUEUE_STOP_REASON_PS); |
545 | } |
546 | |
547 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) |
548 | { |
549 | struct ieee80211_local *local = |
550 | container_of(work, struct ieee80211_local, |
551 | dynamic_ps_enable_work); |
552 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; |
553 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
554 | |
555 | /* can only happen when PS was just disabled anyway */ |
556 | if (!sdata) |
557 | return; |
558 | |
559 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
560 | return; |
561 | |
562 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
563 | (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) |
564 | ieee80211_send_nullfunc(local, sdata, 1); |
565 | |
566 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
567 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || |
568 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
569 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
570 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
571 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
572 | } |
573 | } |
574 | |
575 | void ieee80211_dynamic_ps_timer(unsigned long data) |
576 | { |
577 | struct ieee80211_local *local = (void *) data; |
578 | |
579 | if (local->quiescing || local->suspended) |
580 | return; |
581 | |
582 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
583 | } |
584 | |
585 | /* MLME */ |
586 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
587 | struct ieee80211_if_managed *ifmgd, |
588 | u8 *wmm_param, size_t wmm_param_len) |
589 | { |
590 | struct ieee80211_tx_queue_params params; |
591 | size_t left; |
592 | int count; |
593 | u8 *pos, uapsd_queues = 0; |
594 | |
595 | if (local->hw.queues < 4) |
596 | return; |
597 | |
598 | if (!wmm_param) |
599 | return; |
600 | |
601 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
602 | return; |
603 | |
604 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) |
605 | uapsd_queues = local->uapsd_queues; |
606 | |
607 | count = wmm_param[6] & 0x0f; |
608 | if (count == ifmgd->wmm_last_param_set) |
609 | return; |
610 | ifmgd->wmm_last_param_set = count; |
611 | |
612 | pos = wmm_param + 8; |
613 | left = wmm_param_len - 8; |
614 | |
615 | memset(¶ms, 0, sizeof(params)); |
616 | |
617 | local->wmm_acm = 0; |
618 | for (; left >= 4; left -= 4, pos += 4) { |
619 | int aci = (pos[0] >> 5) & 0x03; |
620 | int acm = (pos[0] >> 4) & 0x01; |
621 | bool uapsd = false; |
622 | int queue; |
623 | |
624 | switch (aci) { |
625 | case 1: /* AC_BK */ |
626 | queue = 3; |
627 | if (acm) |
628 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
629 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
630 | uapsd = true; |
631 | break; |
632 | case 2: /* AC_VI */ |
633 | queue = 1; |
634 | if (acm) |
635 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
636 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
637 | uapsd = true; |
638 | break; |
639 | case 3: /* AC_VO */ |
640 | queue = 0; |
641 | if (acm) |
642 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
643 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
644 | uapsd = true; |
645 | break; |
646 | case 0: /* AC_BE */ |
647 | default: |
648 | queue = 2; |
649 | if (acm) |
650 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
651 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
652 | uapsd = true; |
653 | break; |
654 | } |
655 | |
656 | params.aifs = pos[0] & 0x0f; |
657 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); |
658 | params.cw_min = ecw2cw(pos[1] & 0x0f); |
659 | params.txop = get_unaligned_le16(pos + 2); |
660 | params.uapsd = uapsd; |
661 | |
662 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
663 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
664 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
665 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
666 | params.aifs, params.cw_min, params.cw_max, params.txop, |
667 | params.uapsd); |
668 | #endif |
669 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
670 | printk(KERN_DEBUG "%s: failed to set TX queue " |
671 | "parameters for queue %d\n", |
672 | wiphy_name(local->hw.wiphy), queue); |
673 | } |
674 | } |
675 | |
676 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
677 | u16 capab, bool erp_valid, u8 erp) |
678 | { |
679 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
680 | u32 changed = 0; |
681 | bool use_protection; |
682 | bool use_short_preamble; |
683 | bool use_short_slot; |
684 | |
685 | if (erp_valid) { |
686 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; |
687 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; |
688 | } else { |
689 | use_protection = false; |
690 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); |
691 | } |
692 | |
693 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); |
694 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
695 | use_short_slot = true; |
696 | |
697 | if (use_protection != bss_conf->use_cts_prot) { |
698 | bss_conf->use_cts_prot = use_protection; |
699 | changed |= BSS_CHANGED_ERP_CTS_PROT; |
700 | } |
701 | |
702 | if (use_short_preamble != bss_conf->use_short_preamble) { |
703 | bss_conf->use_short_preamble = use_short_preamble; |
704 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
705 | } |
706 | |
707 | if (use_short_slot != bss_conf->use_short_slot) { |
708 | bss_conf->use_short_slot = use_short_slot; |
709 | changed |= BSS_CHANGED_ERP_SLOT; |
710 | } |
711 | |
712 | return changed; |
713 | } |
714 | |
715 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
716 | struct cfg80211_bss *cbss, |
717 | u32 bss_info_changed) |
718 | { |
719 | struct ieee80211_bss *bss = (void *)cbss->priv; |
720 | struct ieee80211_local *local = sdata->local; |
721 | |
722 | bss_info_changed |= BSS_CHANGED_ASSOC; |
723 | /* set timing information */ |
724 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
725 | sdata->vif.bss_conf.timestamp = cbss->tsf; |
726 | |
727 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
728 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
729 | cbss->capability, bss->has_erp_value, bss->erp_value); |
730 | |
731 | sdata->u.mgd.associated = cbss; |
732 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); |
733 | |
734 | /* just to be sure */ |
735 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
736 | IEEE80211_STA_BEACON_POLL); |
737 | |
738 | /* |
739 | * Always handle WMM once after association regardless |
740 | * of the first value the AP uses. Setting -1 here has |
741 | * that effect because the AP values is an unsigned |
742 | * 4-bit value. |
743 | */ |
744 | sdata->u.mgd.wmm_last_param_set = -1; |
745 | |
746 | ieee80211_led_assoc(local, 1); |
747 | |
748 | sdata->vif.bss_conf.assoc = 1; |
749 | /* |
750 | * For now just always ask the driver to update the basic rateset |
751 | * when we have associated, we aren't checking whether it actually |
752 | * changed or not. |
753 | */ |
754 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
755 | |
756 | /* And the BSSID changed - we're associated now */ |
757 | bss_info_changed |= BSS_CHANGED_BSSID; |
758 | |
759 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
760 | |
761 | mutex_lock(&local->iflist_mtx); |
762 | ieee80211_recalc_ps(local, -1); |
763 | ieee80211_recalc_smps(local, sdata); |
764 | mutex_unlock(&local->iflist_mtx); |
765 | |
766 | netif_tx_start_all_queues(sdata->dev); |
767 | netif_carrier_on(sdata->dev); |
768 | } |
769 | |
770 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) |
771 | { |
772 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
773 | struct ieee80211_local *local = sdata->local; |
774 | struct sta_info *sta; |
775 | u32 changed = 0, config_changed = 0; |
776 | u8 bssid[ETH_ALEN]; |
777 | |
778 | ASSERT_MGD_MTX(ifmgd); |
779 | |
780 | if (WARN_ON(!ifmgd->associated)) |
781 | return; |
782 | |
783 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
784 | |
785 | ifmgd->associated = NULL; |
786 | memset(ifmgd->bssid, 0, ETH_ALEN); |
787 | |
788 | /* |
789 | * we need to commit the associated = NULL change because the |
790 | * scan code uses that to determine whether this iface should |
791 | * go to/wake up from powersave or not -- and could otherwise |
792 | * wake the queues erroneously. |
793 | */ |
794 | smp_mb(); |
795 | |
796 | /* |
797 | * Thus, we can only afterwards stop the queues -- to account |
798 | * for the case where another CPU is finishing a scan at this |
799 | * time -- we don't want the scan code to enable queues. |
800 | */ |
801 | |
802 | netif_tx_stop_all_queues(sdata->dev); |
803 | netif_carrier_off(sdata->dev); |
804 | |
805 | rcu_read_lock(); |
806 | sta = sta_info_get(sdata, bssid); |
807 | if (sta) { |
808 | set_sta_flags(sta, WLAN_STA_DISASSOC); |
809 | ieee80211_sta_tear_down_BA_sessions(sta); |
810 | } |
811 | rcu_read_unlock(); |
812 | |
813 | changed |= ieee80211_reset_erp_info(sdata); |
814 | |
815 | ieee80211_led_assoc(local, 0); |
816 | changed |= BSS_CHANGED_ASSOC; |
817 | sdata->vif.bss_conf.assoc = false; |
818 | |
819 | ieee80211_set_wmm_default(sdata); |
820 | |
821 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
822 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
823 | |
824 | /* on the next assoc, re-program HT parameters */ |
825 | sdata->ht_opmode_valid = false; |
826 | |
827 | local->power_constr_level = 0; |
828 | |
829 | del_timer_sync(&local->dynamic_ps_timer); |
830 | cancel_work_sync(&local->dynamic_ps_enable_work); |
831 | |
832 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
833 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
834 | config_changed |= IEEE80211_CONF_CHANGE_PS; |
835 | } |
836 | |
837 | ieee80211_hw_config(local, config_changed); |
838 | |
839 | /* And the BSSID changed -- not very interesting here */ |
840 | changed |= BSS_CHANGED_BSSID; |
841 | ieee80211_bss_info_change_notify(sdata, changed); |
842 | |
843 | sta_info_destroy_addr(sdata, bssid); |
844 | } |
845 | |
846 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
847 | struct ieee80211_hdr *hdr) |
848 | { |
849 | /* |
850 | * We can postpone the mgd.timer whenever receiving unicast frames |
851 | * from AP because we know that the connection is working both ways |
852 | * at that time. But multicast frames (and hence also beacons) must |
853 | * be ignored here, because we need to trigger the timer during |
854 | * data idle periods for sending the periodic probe request to the |
855 | * AP we're connected to. |
856 | */ |
857 | if (is_multicast_ether_addr(hdr->addr1)) |
858 | return; |
859 | |
860 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
861 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); |
862 | } |
863 | |
864 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
865 | { |
866 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
867 | const u8 *ssid; |
868 | |
869 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
870 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, |
871 | ssid + 2, ssid[1], NULL, 0); |
872 | |
873 | ifmgd->probe_send_count++; |
874 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; |
875 | run_again(ifmgd, ifmgd->probe_timeout); |
876 | } |
877 | |
878 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
879 | bool beacon) |
880 | { |
881 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
882 | bool already = false; |
883 | |
884 | if (!ieee80211_sdata_running(sdata)) |
885 | return; |
886 | |
887 | if (sdata->local->scanning) |
888 | return; |
889 | |
890 | if (sdata->local->tmp_channel) |
891 | return; |
892 | |
893 | mutex_lock(&ifmgd->mtx); |
894 | |
895 | if (!ifmgd->associated) |
896 | goto out; |
897 | |
898 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
899 | if (beacon && net_ratelimit()) |
900 | printk(KERN_DEBUG "%s: detected beacon loss from AP " |
901 | "- sending probe request\n", sdata->name); |
902 | #endif |
903 | |
904 | /* |
905 | * The driver/our work has already reported this event or the |
906 | * connection monitoring has kicked in and we have already sent |
907 | * a probe request. Or maybe the AP died and the driver keeps |
908 | * reporting until we disassociate... |
909 | * |
910 | * In either case we have to ignore the current call to this |
911 | * function (except for setting the correct probe reason bit) |
912 | * because otherwise we would reset the timer every time and |
913 | * never check whether we received a probe response! |
914 | */ |
915 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
916 | IEEE80211_STA_CONNECTION_POLL)) |
917 | already = true; |
918 | |
919 | if (beacon) |
920 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; |
921 | else |
922 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; |
923 | |
924 | if (already) |
925 | goto out; |
926 | |
927 | mutex_lock(&sdata->local->iflist_mtx); |
928 | ieee80211_recalc_ps(sdata->local, -1); |
929 | mutex_unlock(&sdata->local->iflist_mtx); |
930 | |
931 | ifmgd->probe_send_count = 0; |
932 | ieee80211_mgd_probe_ap_send(sdata); |
933 | out: |
934 | mutex_unlock(&ifmgd->mtx); |
935 | } |
936 | |
937 | void ieee80211_beacon_loss_work(struct work_struct *work) |
938 | { |
939 | struct ieee80211_sub_if_data *sdata = |
940 | container_of(work, struct ieee80211_sub_if_data, |
941 | u.mgd.beacon_loss_work); |
942 | |
943 | ieee80211_mgd_probe_ap(sdata, true); |
944 | } |
945 | |
946 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
947 | { |
948 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
949 | |
950 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
951 | } |
952 | EXPORT_SYMBOL(ieee80211_beacon_loss); |
953 | |
954 | static enum rx_mgmt_action __must_check |
955 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
956 | struct ieee80211_mgmt *mgmt, size_t len) |
957 | { |
958 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
959 | const u8 *bssid = NULL; |
960 | u16 reason_code; |
961 | |
962 | if (len < 24 + 2) |
963 | return RX_MGMT_NONE; |
964 | |
965 | ASSERT_MGD_MTX(ifmgd); |
966 | |
967 | bssid = ifmgd->associated->bssid; |
968 | |
969 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); |
970 | |
971 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
972 | sdata->name, bssid, reason_code); |
973 | |
974 | ieee80211_set_disassoc(sdata); |
975 | ieee80211_recalc_idle(sdata->local); |
976 | |
977 | return RX_MGMT_CFG80211_DEAUTH; |
978 | } |
979 | |
980 | |
981 | static enum rx_mgmt_action __must_check |
982 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
983 | struct ieee80211_mgmt *mgmt, size_t len) |
984 | { |
985 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
986 | u16 reason_code; |
987 | |
988 | if (len < 24 + 2) |
989 | return RX_MGMT_NONE; |
990 | |
991 | ASSERT_MGD_MTX(ifmgd); |
992 | |
993 | if (WARN_ON(!ifmgd->associated)) |
994 | return RX_MGMT_NONE; |
995 | |
996 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
997 | return RX_MGMT_NONE; |
998 | |
999 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); |
1000 | |
1001 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
1002 | sdata->name, mgmt->sa, reason_code); |
1003 | |
1004 | ieee80211_set_disassoc(sdata); |
1005 | ieee80211_recalc_idle(sdata->local); |
1006 | return RX_MGMT_CFG80211_DISASSOC; |
1007 | } |
1008 | |
1009 | |
1010 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
1011 | struct ieee80211_mgmt *mgmt, size_t len) |
1012 | { |
1013 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
1014 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1015 | struct ieee80211_local *local = sdata->local; |
1016 | struct ieee80211_supported_band *sband; |
1017 | struct sta_info *sta; |
1018 | struct cfg80211_bss *cbss = wk->assoc.bss; |
1019 | u8 *pos; |
1020 | u32 rates, basic_rates; |
1021 | u16 capab_info, aid; |
1022 | struct ieee802_11_elems elems; |
1023 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
1024 | u32 changed = 0; |
1025 | int i, j, err; |
1026 | bool have_higher_than_11mbit = false; |
1027 | u16 ap_ht_cap_flags; |
1028 | |
1029 | /* AssocResp and ReassocResp have identical structure */ |
1030 | |
1031 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
1032 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
1033 | |
1034 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1035 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " |
1036 | "set\n", sdata->name, aid); |
1037 | aid &= ~(BIT(15) | BIT(14)); |
1038 | |
1039 | pos = mgmt->u.assoc_resp.variable; |
1040 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
1041 | |
1042 | if (!elems.supp_rates) { |
1043 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", |
1044 | sdata->name); |
1045 | return false; |
1046 | } |
1047 | |
1048 | ifmgd->aid = aid; |
1049 | |
1050 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
1051 | if (!sta) { |
1052 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1053 | " the AP\n", sdata->name); |
1054 | return false; |
1055 | } |
1056 | |
1057 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1058 | WLAN_STA_ASSOC_AP); |
1059 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) |
1060 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
1061 | |
1062 | rates = 0; |
1063 | basic_rates = 0; |
1064 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1065 | |
1066 | for (i = 0; i < elems.supp_rates_len; i++) { |
1067 | int rate = (elems.supp_rates[i] & 0x7f) * 5; |
1068 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
1069 | |
1070 | if (rate > 110) |
1071 | have_higher_than_11mbit = true; |
1072 | |
1073 | for (j = 0; j < sband->n_bitrates; j++) { |
1074 | if (sband->bitrates[j].bitrate == rate) { |
1075 | rates |= BIT(j); |
1076 | if (is_basic) |
1077 | basic_rates |= BIT(j); |
1078 | break; |
1079 | } |
1080 | } |
1081 | } |
1082 | |
1083 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1084 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; |
1085 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
1086 | |
1087 | if (rate > 110) |
1088 | have_higher_than_11mbit = true; |
1089 | |
1090 | for (j = 0; j < sband->n_bitrates; j++) { |
1091 | if (sband->bitrates[j].bitrate == rate) { |
1092 | rates |= BIT(j); |
1093 | if (is_basic) |
1094 | basic_rates |= BIT(j); |
1095 | break; |
1096 | } |
1097 | } |
1098 | } |
1099 | |
1100 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
1101 | sdata->vif.bss_conf.basic_rates = basic_rates; |
1102 | |
1103 | /* cf. IEEE 802.11 9.2.12 */ |
1104 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && |
1105 | have_higher_than_11mbit) |
1106 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
1107 | else |
1108 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
1109 | |
1110 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
1111 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
1112 | elems.ht_cap_elem, &sta->sta.ht_cap); |
1113 | |
1114 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
1115 | |
1116 | rate_control_rate_init(sta); |
1117 | |
1118 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
1119 | set_sta_flags(sta, WLAN_STA_MFP); |
1120 | |
1121 | if (elems.wmm_param) |
1122 | set_sta_flags(sta, WLAN_STA_WME); |
1123 | |
1124 | err = sta_info_insert(sta); |
1125 | sta = NULL; |
1126 | if (err) { |
1127 | printk(KERN_DEBUG "%s: failed to insert STA entry for" |
1128 | " the AP (error %d)\n", sdata->name, err); |
1129 | return false; |
1130 | } |
1131 | |
1132 | if (elems.wmm_param) |
1133 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1134 | elems.wmm_param_len); |
1135 | else |
1136 | ieee80211_set_wmm_default(sdata); |
1137 | |
1138 | local->oper_channel = wk->chan; |
1139 | |
1140 | if (elems.ht_info_elem && elems.wmm_param && |
1141 | (sdata->local->hw.queues >= 4) && |
1142 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
1143 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1144 | cbss->bssid, ap_ht_cap_flags); |
1145 | |
1146 | /* set AID and assoc capability, |
1147 | * ieee80211_set_associated() will tell the driver */ |
1148 | bss_conf->aid = aid; |
1149 | bss_conf->assoc_capability = capab_info; |
1150 | ieee80211_set_associated(sdata, cbss, changed); |
1151 | |
1152 | /* |
1153 | * If we're using 4-addr mode, let the AP know that we're |
1154 | * doing so, so that it can create the STA VLAN on its side |
1155 | */ |
1156 | if (ifmgd->use_4addr) |
1157 | ieee80211_send_4addr_nullfunc(local, sdata); |
1158 | |
1159 | /* |
1160 | * Start timer to probe the connection to the AP now. |
1161 | * Also start the timer that will detect beacon loss. |
1162 | */ |
1163 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1164 | mod_beacon_timer(sdata); |
1165 | |
1166 | return true; |
1167 | } |
1168 | |
1169 | |
1170 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1171 | struct ieee80211_mgmt *mgmt, |
1172 | size_t len, |
1173 | struct ieee80211_rx_status *rx_status, |
1174 | struct ieee802_11_elems *elems, |
1175 | bool beacon) |
1176 | { |
1177 | struct ieee80211_local *local = sdata->local; |
1178 | int freq; |
1179 | struct ieee80211_bss *bss; |
1180 | struct ieee80211_channel *channel; |
1181 | bool need_ps = false; |
1182 | |
1183 | if (sdata->u.mgd.associated) { |
1184 | bss = (void *)sdata->u.mgd.associated->priv; |
1185 | /* not previously set so we may need to recalc */ |
1186 | need_ps = !bss->dtim_period; |
1187 | } |
1188 | |
1189 | if (elems->ds_params && elems->ds_params_len == 1) |
1190 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); |
1191 | else |
1192 | freq = rx_status->freq; |
1193 | |
1194 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
1195 | |
1196 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
1197 | return; |
1198 | |
1199 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
1200 | channel, beacon); |
1201 | if (bss) |
1202 | ieee80211_rx_bss_put(local, bss); |
1203 | |
1204 | if (!sdata->u.mgd.associated) |
1205 | return; |
1206 | |
1207 | if (need_ps) { |
1208 | mutex_lock(&local->iflist_mtx); |
1209 | ieee80211_recalc_ps(local, -1); |
1210 | mutex_unlock(&local->iflist_mtx); |
1211 | } |
1212 | |
1213 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
1214 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
1215 | ETH_ALEN) == 0)) { |
1216 | struct ieee80211_channel_sw_ie *sw_elem = |
1217 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; |
1218 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
1219 | } |
1220 | } |
1221 | |
1222 | |
1223 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
1224 | struct sk_buff *skb) |
1225 | { |
1226 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
1227 | struct ieee80211_if_managed *ifmgd; |
1228 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1229 | size_t baselen, len = skb->len; |
1230 | struct ieee802_11_elems elems; |
1231 | |
1232 | ifmgd = &sdata->u.mgd; |
1233 | |
1234 | ASSERT_MGD_MTX(ifmgd); |
1235 | |
1236 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
1237 | return; /* ignore ProbeResp to foreign address */ |
1238 | |
1239 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1240 | if (baselen > len) |
1241 | return; |
1242 | |
1243 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
1244 | &elems); |
1245 | |
1246 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
1247 | |
1248 | if (ifmgd->associated && |
1249 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
1250 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1251 | IEEE80211_STA_CONNECTION_POLL)) { |
1252 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
1253 | IEEE80211_STA_BEACON_POLL); |
1254 | mutex_lock(&sdata->local->iflist_mtx); |
1255 | ieee80211_recalc_ps(sdata->local, -1); |
1256 | mutex_unlock(&sdata->local->iflist_mtx); |
1257 | /* |
1258 | * We've received a probe response, but are not sure whether |
1259 | * we have or will be receiving any beacons or data, so let's |
1260 | * schedule the timers again, just in case. |
1261 | */ |
1262 | mod_beacon_timer(sdata); |
1263 | mod_timer(&ifmgd->conn_mon_timer, |
1264 | round_jiffies_up(jiffies + |
1265 | IEEE80211_CONNECTION_IDLE_TIME)); |
1266 | } |
1267 | } |
1268 | |
1269 | /* |
1270 | * This is the canonical list of information elements we care about, |
1271 | * the filter code also gives us all changes to the Microsoft OUI |
1272 | * (00:50:F2) vendor IE which is used for WMM which we need to track. |
1273 | * |
1274 | * We implement beacon filtering in software since that means we can |
1275 | * avoid processing the frame here and in cfg80211, and userspace |
1276 | * will not be able to tell whether the hardware supports it or not. |
1277 | * |
1278 | * XXX: This list needs to be dynamic -- userspace needs to be able to |
1279 | * add items it requires. It also needs to be able to tell us to |
1280 | * look out for other vendor IEs. |
1281 | */ |
1282 | static const u64 care_about_ies = |
1283 | (1ULL << WLAN_EID_COUNTRY) | |
1284 | (1ULL << WLAN_EID_ERP_INFO) | |
1285 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | |
1286 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | |
1287 | (1ULL << WLAN_EID_HT_CAPABILITY) | |
1288 | (1ULL << WLAN_EID_HT_INFORMATION); |
1289 | |
1290 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
1291 | struct ieee80211_mgmt *mgmt, |
1292 | size_t len, |
1293 | struct ieee80211_rx_status *rx_status) |
1294 | { |
1295 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1296 | size_t baselen; |
1297 | struct ieee802_11_elems elems; |
1298 | struct ieee80211_local *local = sdata->local; |
1299 | u32 changed = 0; |
1300 | bool erp_valid, directed_tim = false; |
1301 | u8 erp_value = 0; |
1302 | u32 ncrc; |
1303 | u8 *bssid; |
1304 | |
1305 | ASSERT_MGD_MTX(ifmgd); |
1306 | |
1307 | /* Process beacon from the current BSS */ |
1308 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
1309 | if (baselen > len) |
1310 | return; |
1311 | |
1312 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1313 | return; |
1314 | |
1315 | /* |
1316 | * We might have received a number of frames, among them a |
1317 | * disassoc frame and a beacon... |
1318 | */ |
1319 | if (!ifmgd->associated) |
1320 | return; |
1321 | |
1322 | bssid = ifmgd->associated->bssid; |
1323 | |
1324 | /* |
1325 | * And in theory even frames from a different AP we were just |
1326 | * associated to a split-second ago! |
1327 | */ |
1328 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) |
1329 | return; |
1330 | |
1331 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
1332 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1333 | if (net_ratelimit()) { |
1334 | printk(KERN_DEBUG "%s: cancelling probereq poll due " |
1335 | "to a received beacon\n", sdata->name); |
1336 | } |
1337 | #endif |
1338 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
1339 | mutex_lock(&local->iflist_mtx); |
1340 | ieee80211_recalc_ps(local, -1); |
1341 | mutex_unlock(&local->iflist_mtx); |
1342 | } |
1343 | |
1344 | /* |
1345 | * Push the beacon loss detection into the future since |
1346 | * we are processing a beacon from the AP just now. |
1347 | */ |
1348 | mod_beacon_timer(sdata); |
1349 | |
1350 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1351 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, |
1352 | len - baselen, &elems, |
1353 | care_about_ies, ncrc); |
1354 | |
1355 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1356 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1357 | ifmgd->aid); |
1358 | |
1359 | if (ncrc != ifmgd->beacon_crc) { |
1360 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
1361 | true); |
1362 | |
1363 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1364 | elems.wmm_param_len); |
1365 | } |
1366 | |
1367 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1368 | if (directed_tim) { |
1369 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1370 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
1371 | ieee80211_hw_config(local, |
1372 | IEEE80211_CONF_CHANGE_PS); |
1373 | ieee80211_send_nullfunc(local, sdata, 0); |
1374 | } else { |
1375 | local->pspolling = true; |
1376 | |
1377 | /* |
1378 | * Here is assumed that the driver will be |
1379 | * able to send ps-poll frame and receive a |
1380 | * response even though power save mode is |
1381 | * enabled, but some drivers might require |
1382 | * to disable power save here. This needs |
1383 | * to be investigated. |
1384 | */ |
1385 | ieee80211_send_pspoll(local, sdata); |
1386 | } |
1387 | } |
1388 | } |
1389 | |
1390 | if (ncrc == ifmgd->beacon_crc) |
1391 | return; |
1392 | ifmgd->beacon_crc = ncrc; |
1393 | |
1394 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1395 | erp_valid = true; |
1396 | erp_value = elems.erp_info[0]; |
1397 | } else { |
1398 | erp_valid = false; |
1399 | } |
1400 | changed |= ieee80211_handle_bss_capability(sdata, |
1401 | le16_to_cpu(mgmt->u.beacon.capab_info), |
1402 | erp_valid, erp_value); |
1403 | |
1404 | |
1405 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
1406 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
1407 | struct sta_info *sta; |
1408 | struct ieee80211_supported_band *sband; |
1409 | u16 ap_ht_cap_flags; |
1410 | |
1411 | rcu_read_lock(); |
1412 | |
1413 | sta = sta_info_get(sdata, bssid); |
1414 | if (WARN_ON(!sta)) { |
1415 | rcu_read_unlock(); |
1416 | return; |
1417 | } |
1418 | |
1419 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1420 | |
1421 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
1422 | elems.ht_cap_elem, &sta->sta.ht_cap); |
1423 | |
1424 | ap_ht_cap_flags = sta->sta.ht_cap.cap; |
1425 | |
1426 | rcu_read_unlock(); |
1427 | |
1428 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1429 | bssid, ap_ht_cap_flags); |
1430 | } |
1431 | |
1432 | /* Note: country IE parsing is done for us by cfg80211 */ |
1433 | if (elems.country_elem) { |
1434 | /* TODO: IBSS also needs this */ |
1435 | if (elems.pwr_constr_elem) |
1436 | ieee80211_handle_pwr_constr(sdata, |
1437 | le16_to_cpu(mgmt->u.probe_resp.capab_info), |
1438 | elems.pwr_constr_elem, |
1439 | elems.pwr_constr_elem_len); |
1440 | } |
1441 | |
1442 | ieee80211_bss_info_change_notify(sdata, changed); |
1443 | } |
1444 | |
1445 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1446 | struct sk_buff *skb) |
1447 | { |
1448 | struct ieee80211_local *local = sdata->local; |
1449 | struct ieee80211_mgmt *mgmt; |
1450 | u16 fc; |
1451 | |
1452 | if (skb->len < 24) |
1453 | return RX_DROP_MONITOR; |
1454 | |
1455 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1456 | fc = le16_to_cpu(mgmt->frame_control); |
1457 | |
1458 | switch (fc & IEEE80211_FCTL_STYPE) { |
1459 | case IEEE80211_STYPE_PROBE_RESP: |
1460 | case IEEE80211_STYPE_BEACON: |
1461 | case IEEE80211_STYPE_DEAUTH: |
1462 | case IEEE80211_STYPE_DISASSOC: |
1463 | case IEEE80211_STYPE_ACTION: |
1464 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1465 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
1466 | return RX_QUEUED; |
1467 | } |
1468 | |
1469 | return RX_DROP_MONITOR; |
1470 | } |
1471 | |
1472 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1473 | struct sk_buff *skb) |
1474 | { |
1475 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1476 | struct ieee80211_rx_status *rx_status; |
1477 | struct ieee80211_mgmt *mgmt; |
1478 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
1479 | u16 fc; |
1480 | |
1481 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1482 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1483 | fc = le16_to_cpu(mgmt->frame_control); |
1484 | |
1485 | mutex_lock(&ifmgd->mtx); |
1486 | |
1487 | if (ifmgd->associated && |
1488 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
1489 | switch (fc & IEEE80211_FCTL_STYPE) { |
1490 | case IEEE80211_STYPE_BEACON: |
1491 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
1492 | rx_status); |
1493 | break; |
1494 | case IEEE80211_STYPE_PROBE_RESP: |
1495 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
1496 | break; |
1497 | case IEEE80211_STYPE_DEAUTH: |
1498 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
1499 | break; |
1500 | case IEEE80211_STYPE_DISASSOC: |
1501 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); |
1502 | break; |
1503 | case IEEE80211_STYPE_ACTION: |
1504 | if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
1505 | break; |
1506 | |
1507 | ieee80211_sta_process_chanswitch(sdata, |
1508 | &mgmt->u.action.u.chan_switch.sw_elem, |
1509 | (void *)ifmgd->associated->priv); |
1510 | break; |
1511 | } |
1512 | mutex_unlock(&ifmgd->mtx); |
1513 | |
1514 | switch (rma) { |
1515 | case RX_MGMT_NONE: |
1516 | /* no action */ |
1517 | break; |
1518 | case RX_MGMT_CFG80211_DEAUTH: |
1519 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
1520 | break; |
1521 | case RX_MGMT_CFG80211_DISASSOC: |
1522 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
1523 | break; |
1524 | default: |
1525 | WARN(1, "unexpected: %d", rma); |
1526 | } |
1527 | goto out; |
1528 | } |
1529 | |
1530 | mutex_unlock(&ifmgd->mtx); |
1531 | |
1532 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
1533 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) |
1534 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
1535 | |
1536 | out: |
1537 | kfree_skb(skb); |
1538 | } |
1539 | |
1540 | static void ieee80211_sta_timer(unsigned long data) |
1541 | { |
1542 | struct ieee80211_sub_if_data *sdata = |
1543 | (struct ieee80211_sub_if_data *) data; |
1544 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1545 | struct ieee80211_local *local = sdata->local; |
1546 | |
1547 | if (local->quiescing) { |
1548 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
1549 | return; |
1550 | } |
1551 | |
1552 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
1553 | } |
1554 | |
1555 | static void ieee80211_sta_work(struct work_struct *work) |
1556 | { |
1557 | struct ieee80211_sub_if_data *sdata = |
1558 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
1559 | struct ieee80211_local *local = sdata->local; |
1560 | struct ieee80211_if_managed *ifmgd; |
1561 | struct sk_buff *skb; |
1562 | |
1563 | if (!ieee80211_sdata_running(sdata)) |
1564 | return; |
1565 | |
1566 | if (local->scanning) |
1567 | return; |
1568 | |
1569 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
1570 | return; |
1571 | |
1572 | /* |
1573 | * ieee80211_queue_work() should have picked up most cases, |
1574 | * here we'll pick the the rest. |
1575 | */ |
1576 | if (WARN(local->suspended, "STA MLME work scheduled while " |
1577 | "going to suspend\n")) |
1578 | return; |
1579 | |
1580 | ifmgd = &sdata->u.mgd; |
1581 | |
1582 | /* first process frames to avoid timing out while a frame is pending */ |
1583 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
1584 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1585 | |
1586 | /* then process the rest of the work */ |
1587 | mutex_lock(&ifmgd->mtx); |
1588 | |
1589 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1590 | IEEE80211_STA_CONNECTION_POLL) && |
1591 | ifmgd->associated) { |
1592 | u8 bssid[ETH_ALEN]; |
1593 | |
1594 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
1595 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1596 | run_again(ifmgd, ifmgd->probe_timeout); |
1597 | |
1598 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { |
1599 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1600 | printk(KERN_DEBUG "No probe response from AP %pM" |
1601 | " after %dms, try %d\n", bssid, |
1602 | (1000 * IEEE80211_PROBE_WAIT)/HZ, |
1603 | ifmgd->probe_send_count); |
1604 | #endif |
1605 | ieee80211_mgd_probe_ap_send(sdata); |
1606 | } else { |
1607 | /* |
1608 | * We actually lost the connection ... or did we? |
1609 | * Let's make sure! |
1610 | */ |
1611 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | |
1612 | IEEE80211_STA_BEACON_POLL); |
1613 | printk(KERN_DEBUG "No probe response from AP %pM" |
1614 | " after %dms, disconnecting.\n", |
1615 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); |
1616 | ieee80211_set_disassoc(sdata); |
1617 | ieee80211_recalc_idle(local); |
1618 | mutex_unlock(&ifmgd->mtx); |
1619 | /* |
1620 | * must be outside lock due to cfg80211, |
1621 | * but that's not a problem. |
1622 | */ |
1623 | ieee80211_send_deauth_disassoc(sdata, bssid, |
1624 | IEEE80211_STYPE_DEAUTH, |
1625 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, |
1626 | NULL); |
1627 | mutex_lock(&ifmgd->mtx); |
1628 | } |
1629 | } |
1630 | |
1631 | mutex_unlock(&ifmgd->mtx); |
1632 | } |
1633 | |
1634 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1635 | { |
1636 | struct ieee80211_sub_if_data *sdata = |
1637 | (struct ieee80211_sub_if_data *) data; |
1638 | struct ieee80211_local *local = sdata->local; |
1639 | |
1640 | if (local->quiescing) |
1641 | return; |
1642 | |
1643 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
1644 | } |
1645 | |
1646 | static void ieee80211_sta_conn_mon_timer(unsigned long data) |
1647 | { |
1648 | struct ieee80211_sub_if_data *sdata = |
1649 | (struct ieee80211_sub_if_data *) data; |
1650 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1651 | struct ieee80211_local *local = sdata->local; |
1652 | |
1653 | if (local->quiescing) |
1654 | return; |
1655 | |
1656 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
1657 | } |
1658 | |
1659 | static void ieee80211_sta_monitor_work(struct work_struct *work) |
1660 | { |
1661 | struct ieee80211_sub_if_data *sdata = |
1662 | container_of(work, struct ieee80211_sub_if_data, |
1663 | u.mgd.monitor_work); |
1664 | |
1665 | ieee80211_mgd_probe_ap(sdata, false); |
1666 | } |
1667 | |
1668 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1669 | { |
1670 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
1671 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1672 | IEEE80211_STA_CONNECTION_POLL); |
1673 | |
1674 | /* let's probe the connection once */ |
1675 | ieee80211_queue_work(&sdata->local->hw, |
1676 | &sdata->u.mgd.monitor_work); |
1677 | /* and do all the other regular work too */ |
1678 | ieee80211_queue_work(&sdata->local->hw, |
1679 | &sdata->u.mgd.work); |
1680 | } |
1681 | } |
1682 | |
1683 | #ifdef CONFIG_PM |
1684 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) |
1685 | { |
1686 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1687 | |
1688 | /* |
1689 | * we need to use atomic bitops for the running bits |
1690 | * only because both timers might fire at the same |
1691 | * time -- the code here is properly synchronised. |
1692 | */ |
1693 | |
1694 | cancel_work_sync(&ifmgd->work); |
1695 | cancel_work_sync(&ifmgd->beacon_loss_work); |
1696 | if (del_timer_sync(&ifmgd->timer)) |
1697 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); |
1698 | |
1699 | cancel_work_sync(&ifmgd->chswitch_work); |
1700 | if (del_timer_sync(&ifmgd->chswitch_timer)) |
1701 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); |
1702 | |
1703 | cancel_work_sync(&ifmgd->monitor_work); |
1704 | /* these will just be re-established on connection */ |
1705 | del_timer_sync(&ifmgd->conn_mon_timer); |
1706 | del_timer_sync(&ifmgd->bcn_mon_timer); |
1707 | } |
1708 | |
1709 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) |
1710 | { |
1711 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1712 | |
1713 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
1714 | add_timer(&ifmgd->timer); |
1715 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) |
1716 | add_timer(&ifmgd->chswitch_timer); |
1717 | } |
1718 | #endif |
1719 | |
1720 | /* interface setup */ |
1721 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1722 | { |
1723 | struct ieee80211_if_managed *ifmgd; |
1724 | |
1725 | ifmgd = &sdata->u.mgd; |
1726 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); |
1727 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
1728 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1729 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
1730 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
1731 | (unsigned long) sdata); |
1732 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1733 | (unsigned long) sdata); |
1734 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, |
1735 | (unsigned long) sdata); |
1736 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
1737 | (unsigned long) sdata); |
1738 | skb_queue_head_init(&ifmgd->skb_queue); |
1739 | |
1740 | ifmgd->flags = 0; |
1741 | |
1742 | mutex_init(&ifmgd->mtx); |
1743 | |
1744 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) |
1745 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; |
1746 | else |
1747 | ifmgd->req_smps = IEEE80211_SMPS_OFF; |
1748 | } |
1749 | |
1750 | /* scan finished notification */ |
1751 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) |
1752 | { |
1753 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
1754 | |
1755 | /* Restart STA timers */ |
1756 | rcu_read_lock(); |
1757 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
1758 | ieee80211_restart_sta_timer(sdata); |
1759 | rcu_read_unlock(); |
1760 | } |
1761 | |
1762 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1763 | unsigned long data, void *dummy) |
1764 | { |
1765 | s32 latency_usec = (s32) data; |
1766 | struct ieee80211_local *local = |
1767 | container_of(nb, struct ieee80211_local, |
1768 | network_latency_notifier); |
1769 | |
1770 | mutex_lock(&local->iflist_mtx); |
1771 | ieee80211_recalc_ps(local, latency_usec); |
1772 | mutex_unlock(&local->iflist_mtx); |
1773 | |
1774 | return 0; |
1775 | } |
1776 | |
1777 | /* config hooks */ |
1778 | static enum work_done_result |
1779 | ieee80211_probe_auth_done(struct ieee80211_work *wk, |
1780 | struct sk_buff *skb) |
1781 | { |
1782 | if (!skb) { |
1783 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); |
1784 | return WORK_DONE_DESTROY; |
1785 | } |
1786 | |
1787 | if (wk->type == IEEE80211_WORK_AUTH) { |
1788 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); |
1789 | return WORK_DONE_DESTROY; |
1790 | } |
1791 | |
1792 | mutex_lock(&wk->sdata->u.mgd.mtx); |
1793 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); |
1794 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
1795 | |
1796 | wk->type = IEEE80211_WORK_AUTH; |
1797 | wk->probe_auth.tries = 0; |
1798 | return WORK_DONE_REQUEUE; |
1799 | } |
1800 | |
1801 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
1802 | struct cfg80211_auth_request *req) |
1803 | { |
1804 | const u8 *ssid; |
1805 | struct ieee80211_work *wk; |
1806 | u16 auth_alg; |
1807 | |
1808 | switch (req->auth_type) { |
1809 | case NL80211_AUTHTYPE_OPEN_SYSTEM: |
1810 | auth_alg = WLAN_AUTH_OPEN; |
1811 | break; |
1812 | case NL80211_AUTHTYPE_SHARED_KEY: |
1813 | auth_alg = WLAN_AUTH_SHARED_KEY; |
1814 | break; |
1815 | case NL80211_AUTHTYPE_FT: |
1816 | auth_alg = WLAN_AUTH_FT; |
1817 | break; |
1818 | case NL80211_AUTHTYPE_NETWORK_EAP: |
1819 | auth_alg = WLAN_AUTH_LEAP; |
1820 | break; |
1821 | default: |
1822 | return -EOPNOTSUPP; |
1823 | } |
1824 | |
1825 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
1826 | if (!wk) |
1827 | return -ENOMEM; |
1828 | |
1829 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
1830 | |
1831 | if (req->ie && req->ie_len) { |
1832 | memcpy(wk->ie, req->ie, req->ie_len); |
1833 | wk->ie_len = req->ie_len; |
1834 | } |
1835 | |
1836 | if (req->key && req->key_len) { |
1837 | wk->probe_auth.key_len = req->key_len; |
1838 | wk->probe_auth.key_idx = req->key_idx; |
1839 | memcpy(wk->probe_auth.key, req->key, req->key_len); |
1840 | } |
1841 | |
1842 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
1843 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
1844 | wk->probe_auth.ssid_len = ssid[1]; |
1845 | |
1846 | wk->probe_auth.algorithm = auth_alg; |
1847 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; |
1848 | |
1849 | /* if we already have a probe, don't probe again */ |
1850 | if (req->bss->proberesp_ies) |
1851 | wk->type = IEEE80211_WORK_AUTH; |
1852 | else |
1853 | wk->type = IEEE80211_WORK_DIRECT_PROBE; |
1854 | wk->chan = req->bss->channel; |
1855 | wk->sdata = sdata; |
1856 | wk->done = ieee80211_probe_auth_done; |
1857 | |
1858 | ieee80211_add_work(wk); |
1859 | return 0; |
1860 | } |
1861 | |
1862 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
1863 | struct sk_buff *skb) |
1864 | { |
1865 | struct ieee80211_mgmt *mgmt; |
1866 | u16 status; |
1867 | |
1868 | if (!skb) { |
1869 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); |
1870 | return WORK_DONE_DESTROY; |
1871 | } |
1872 | |
1873 | mgmt = (void *)skb->data; |
1874 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); |
1875 | |
1876 | if (status == WLAN_STATUS_SUCCESS) { |
1877 | mutex_lock(&wk->sdata->u.mgd.mtx); |
1878 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { |
1879 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
1880 | /* oops -- internal error -- send timeout for now */ |
1881 | cfg80211_send_assoc_timeout(wk->sdata->dev, |
1882 | wk->filter_ta); |
1883 | return WORK_DONE_DESTROY; |
1884 | } |
1885 | mutex_unlock(&wk->sdata->u.mgd.mtx); |
1886 | } |
1887 | |
1888 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); |
1889 | return WORK_DONE_DESTROY; |
1890 | } |
1891 | |
1892 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
1893 | struct cfg80211_assoc_request *req) |
1894 | { |
1895 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1896 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
1897 | struct ieee80211_work *wk; |
1898 | const u8 *ssid; |
1899 | int i; |
1900 | |
1901 | mutex_lock(&ifmgd->mtx); |
1902 | if (ifmgd->associated) { |
1903 | if (!req->prev_bssid || |
1904 | memcmp(req->prev_bssid, ifmgd->associated->bssid, |
1905 | ETH_ALEN)) { |
1906 | /* |
1907 | * We are already associated and the request was not a |
1908 | * reassociation request from the current BSS, so |
1909 | * reject it. |
1910 | */ |
1911 | mutex_unlock(&ifmgd->mtx); |
1912 | return -EALREADY; |
1913 | } |
1914 | |
1915 | /* Trying to reassociate - clear previous association state */ |
1916 | ieee80211_set_disassoc(sdata); |
1917 | } |
1918 | mutex_unlock(&ifmgd->mtx); |
1919 | |
1920 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
1921 | if (!wk) |
1922 | return -ENOMEM; |
1923 | |
1924 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
1925 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
1926 | |
1927 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
1928 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || |
1929 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || |
1930 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) |
1931 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; |
1932 | |
1933 | |
1934 | if (req->ie && req->ie_len) { |
1935 | memcpy(wk->ie, req->ie, req->ie_len); |
1936 | wk->ie_len = req->ie_len; |
1937 | } else |
1938 | wk->ie_len = 0; |
1939 | |
1940 | wk->assoc.bss = req->bss; |
1941 | |
1942 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
1943 | |
1944 | /* new association always uses requested smps mode */ |
1945 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
1946 | if (ifmgd->powersave) |
1947 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; |
1948 | else |
1949 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; |
1950 | } else |
1951 | ifmgd->ap_smps = ifmgd->req_smps; |
1952 | |
1953 | wk->assoc.smps = ifmgd->ap_smps; |
1954 | /* |
1955 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. |
1956 | * We still associate in non-HT mode (11a/b/g) if any one of these |
1957 | * ciphers is configured as pairwise. |
1958 | * We can set this to true for non-11n hardware, that'll be checked |
1959 | * separately along with the peer capabilities. |
1960 | */ |
1961 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
1962 | wk->assoc.capability = req->bss->capability; |
1963 | wk->assoc.wmm_used = bss->wmm_used; |
1964 | wk->assoc.supp_rates = bss->supp_rates; |
1965 | wk->assoc.supp_rates_len = bss->supp_rates_len; |
1966 | wk->assoc.ht_information_ie = |
1967 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); |
1968 | |
1969 | if (bss->wmm_used && bss->uapsd_supported && |
1970 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { |
1971 | wk->assoc.uapsd_used = true; |
1972 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
1973 | } else { |
1974 | wk->assoc.uapsd_used = false; |
1975 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
1976 | } |
1977 | |
1978 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
1979 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
1980 | wk->assoc.ssid_len = ssid[1]; |
1981 | |
1982 | if (req->prev_bssid) |
1983 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
1984 | |
1985 | wk->type = IEEE80211_WORK_ASSOC; |
1986 | wk->chan = req->bss->channel; |
1987 | wk->sdata = sdata; |
1988 | wk->done = ieee80211_assoc_done; |
1989 | |
1990 | if (req->use_mfp) { |
1991 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; |
1992 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; |
1993 | } else { |
1994 | ifmgd->mfp = IEEE80211_MFP_DISABLED; |
1995 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; |
1996 | } |
1997 | |
1998 | if (req->crypto.control_port) |
1999 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; |
2000 | else |
2001 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; |
2002 | |
2003 | ieee80211_add_work(wk); |
2004 | return 0; |
2005 | } |
2006 | |
2007 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
2008 | struct cfg80211_deauth_request *req, |
2009 | void *cookie) |
2010 | { |
2011 | struct ieee80211_local *local = sdata->local; |
2012 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2013 | struct ieee80211_work *wk; |
2014 | const u8 *bssid = req->bss->bssid; |
2015 | |
2016 | mutex_lock(&ifmgd->mtx); |
2017 | |
2018 | if (ifmgd->associated == req->bss) { |
2019 | bssid = req->bss->bssid; |
2020 | ieee80211_set_disassoc(sdata); |
2021 | mutex_unlock(&ifmgd->mtx); |
2022 | } else { |
2023 | bool not_auth_yet = false; |
2024 | |
2025 | mutex_unlock(&ifmgd->mtx); |
2026 | |
2027 | mutex_lock(&local->work_mtx); |
2028 | list_for_each_entry(wk, &local->work_list, list) { |
2029 | if (wk->sdata != sdata) |
2030 | continue; |
2031 | |
2032 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE && |
2033 | wk->type != IEEE80211_WORK_AUTH) |
2034 | continue; |
2035 | |
2036 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) |
2037 | continue; |
2038 | |
2039 | not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE; |
2040 | list_del_rcu(&wk->list); |
2041 | free_work(wk); |
2042 | break; |
2043 | } |
2044 | mutex_unlock(&local->work_mtx); |
2045 | |
2046 | /* |
2047 | * If somebody requests authentication and we haven't |
2048 | * sent out an auth frame yet there's no need to send |
2049 | * out a deauth frame either. If the state was PROBE, |
2050 | * then this is the case. If it's AUTH we have sent a |
2051 | * frame, and if it's IDLE we have completed the auth |
2052 | * process already. |
2053 | */ |
2054 | if (not_auth_yet) { |
2055 | __cfg80211_auth_canceled(sdata->dev, bssid); |
2056 | return 0; |
2057 | } |
2058 | } |
2059 | |
2060 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
2061 | sdata->name, bssid, req->reason_code); |
2062 | |
2063 | ieee80211_send_deauth_disassoc(sdata, bssid, |
2064 | IEEE80211_STYPE_DEAUTH, req->reason_code, |
2065 | cookie); |
2066 | |
2067 | ieee80211_recalc_idle(sdata->local); |
2068 | |
2069 | return 0; |
2070 | } |
2071 | |
2072 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
2073 | struct cfg80211_disassoc_request *req, |
2074 | void *cookie) |
2075 | { |
2076 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2077 | |
2078 | mutex_lock(&ifmgd->mtx); |
2079 | |
2080 | /* |
2081 | * cfg80211 should catch this ... but it's racy since |
2082 | * we can receive a disassoc frame, process it, hand it |
2083 | * to cfg80211 while that's in a locked section already |
2084 | * trying to tell us that the user wants to disconnect. |
2085 | */ |
2086 | if (ifmgd->associated != req->bss) { |
2087 | mutex_unlock(&ifmgd->mtx); |
2088 | return -ENOLINK; |
2089 | } |
2090 | |
2091 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
2092 | sdata->name, req->bss->bssid, req->reason_code); |
2093 | |
2094 | ieee80211_set_disassoc(sdata); |
2095 | |
2096 | mutex_unlock(&ifmgd->mtx); |
2097 | |
2098 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
2099 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
2100 | cookie); |
2101 | |
2102 | ieee80211_recalc_idle(sdata->local); |
2103 | |
2104 | return 0; |
2105 | } |
2106 | |
2107 | int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata, |
2108 | struct ieee80211_channel *chan, |
2109 | enum nl80211_channel_type channel_type, |
2110 | const u8 *buf, size_t len, u64 *cookie) |
2111 | { |
2112 | struct ieee80211_local *local = sdata->local; |
2113 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2114 | struct sk_buff *skb; |
2115 | |
2116 | /* Check that we are on the requested channel for transmission */ |
2117 | if ((chan != local->tmp_channel || |
2118 | channel_type != local->tmp_channel_type) && |
2119 | (chan != local->oper_channel || |
2120 | channel_type != local->oper_channel_type)) |
2121 | return -EBUSY; |
2122 | |
2123 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + len); |
2124 | if (!skb) |
2125 | return -ENOMEM; |
2126 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2127 | |
2128 | memcpy(skb_put(skb, len), buf, len); |
2129 | |
2130 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
2131 | IEEE80211_SKB_CB(skb)->flags |= |
2132 | IEEE80211_TX_INTFL_DONT_ENCRYPT; |
2133 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
2134 | IEEE80211_TX_CTL_REQ_TX_STATUS; |
2135 | skb->dev = sdata->dev; |
2136 | ieee80211_tx_skb(sdata, skb); |
2137 | |
2138 | *cookie = (unsigned long) skb; |
2139 | return 0; |
2140 | } |
2141 |
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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