Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
a43abf29 | 30 | #define IEEE80211_MAX_PROBE_TRIES 5 |
b291ba11 JB |
31 | |
32 | /* | |
33 | * beacon loss detection timeout | |
34 | * XXX: should depend on beacon interval | |
35 | */ | |
36 | #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) | |
37 | /* | |
38 | * Time the connection can be idle before we probe | |
39 | * it to see if we can still talk to the AP. | |
40 | */ | |
d1c5091f | 41 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
42 | /* |
43 | * Time we wait for a probe response after sending | |
44 | * a probe request because of beacon loss or for | |
45 | * checking the connection still works. | |
46 | */ | |
d1c5091f | 47 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
f0706e82 | 48 | |
5bb644a0 JB |
49 | #define TMR_RUNNING_TIMER 0 |
50 | #define TMR_RUNNING_CHANSW 1 | |
51 | ||
77fdaa12 JB |
52 | /* |
53 | * All cfg80211 functions have to be called outside a locked | |
54 | * section so that they can acquire a lock themselves... This | |
55 | * is much simpler than queuing up things in cfg80211, but we | |
56 | * do need some indirection for that here. | |
57 | */ | |
58 | enum rx_mgmt_action { | |
59 | /* no action required */ | |
60 | RX_MGMT_NONE, | |
61 | ||
62 | /* caller must call cfg80211_send_rx_auth() */ | |
63 | RX_MGMT_CFG80211_AUTH, | |
64 | ||
65 | /* caller must call cfg80211_send_rx_assoc() */ | |
66 | RX_MGMT_CFG80211_ASSOC, | |
67 | ||
68 | /* caller must call cfg80211_send_deauth() */ | |
69 | RX_MGMT_CFG80211_DEAUTH, | |
70 | ||
71 | /* caller must call cfg80211_send_disassoc() */ | |
72 | RX_MGMT_CFG80211_DISASSOC, | |
73 | ||
5d1ec85f JB |
74 | /* caller must tell cfg80211 about internal error */ |
75 | RX_MGMT_CFG80211_ASSOC_ERROR, | |
77fdaa12 JB |
76 | }; |
77 | ||
5484e237 | 78 | /* utils */ |
77fdaa12 JB |
79 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
80 | { | |
81 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); | |
82 | } | |
83 | ||
ca386f31 JB |
84 | /* |
85 | * We can have multiple work items (and connection probing) | |
86 | * scheduling this timer, but we need to take care to only | |
87 | * reschedule it when it should fire _earlier_ than it was | |
88 | * asked for before, or if it's not pending right now. This | |
89 | * function ensures that. Note that it then is required to | |
90 | * run this function for all timeouts after the first one | |
91 | * has happened -- the work that runs from this timer will | |
92 | * do that. | |
93 | */ | |
94 | static void run_again(struct ieee80211_if_managed *ifmgd, | |
95 | unsigned long timeout) | |
96 | { | |
97 | ASSERT_MGD_MTX(ifmgd); | |
98 | ||
99 | if (!timer_pending(&ifmgd->timer) || | |
100 | time_before(timeout, ifmgd->timer.expires)) | |
101 | mod_timer(&ifmgd->timer, timeout); | |
102 | } | |
103 | ||
b291ba11 JB |
104 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
105 | { | |
106 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) | |
107 | return; | |
108 | ||
109 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
110 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); | |
111 | } | |
112 | ||
5484e237 | 113 | static int ecw2cw(int ecw) |
60f8b39c | 114 | { |
5484e237 | 115 | return (1 << ecw) - 1; |
60f8b39c JB |
116 | } |
117 | ||
d5522e03 JB |
118 | /* |
119 | * ieee80211_enable_ht should be called only after the operating band | |
120 | * has been determined as ht configuration depends on the hw's | |
121 | * HT abilities for a specific band. | |
122 | */ | |
123 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
124 | struct ieee80211_ht_info *hti, | |
77fdaa12 | 125 | const u8 *bssid, u16 ap_ht_cap_flags) |
d5522e03 JB |
126 | { |
127 | struct ieee80211_local *local = sdata->local; | |
128 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
129 | struct sta_info *sta; |
130 | u32 changed = 0; | |
9ed6bcce | 131 | u16 ht_opmode; |
d5522e03 JB |
132 | bool enable_ht = true, ht_changed; |
133 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
134 | ||
135 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
136 | ||
d5522e03 JB |
137 | /* HT is not supported */ |
138 | if (!sband->ht_cap.ht_supported) | |
139 | enable_ht = false; | |
140 | ||
141 | /* check that channel matches the right operating channel */ | |
142 | if (local->hw.conf.channel->center_freq != | |
143 | ieee80211_channel_to_frequency(hti->control_chan)) | |
144 | enable_ht = false; | |
145 | ||
146 | if (enable_ht) { | |
147 | channel_type = NL80211_CHAN_HT20; | |
148 | ||
149 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
150 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
151 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
152 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
153 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
154 | if (!(local->hw.conf.channel->flags & |
155 | IEEE80211_CHAN_NO_HT40PLUS)) | |
156 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
157 | break; |
158 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
159 | if (!(local->hw.conf.channel->flags & |
160 | IEEE80211_CHAN_NO_HT40MINUS)) | |
161 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
162 | break; |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
168 | channel_type != local->hw.conf.channel_type; | |
169 | ||
170 | local->oper_channel_type = channel_type; | |
171 | ||
172 | if (ht_changed) { | |
173 | /* channel_type change automatically detected */ | |
174 | ieee80211_hw_config(local, 0); | |
175 | ||
176 | rcu_read_lock(); | |
abe60632 | 177 | sta = sta_info_get(sdata, bssid); |
d5522e03 JB |
178 | if (sta) |
179 | rate_control_rate_update(local, sband, sta, | |
180 | IEEE80211_RC_HT_CHANGED); | |
d5522e03 | 181 | rcu_read_unlock(); |
d5522e03 JB |
182 | } |
183 | ||
184 | /* disable HT */ | |
185 | if (!enable_ht) | |
186 | return 0; | |
187 | ||
9ed6bcce | 188 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
189 | |
190 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
191 | if (!sdata->ht_opmode_valid || |
192 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 193 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 194 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 195 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
196 | } |
197 | ||
198 | return changed; | |
199 | } | |
200 | ||
9c6bd790 JB |
201 | /* frame sending functions */ |
202 | ||
ef422bc0 | 203 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
204 | const u8 *bssid, u16 stype, u16 reason, |
205 | void *cookie) | |
9ac19a90 JB |
206 | { |
207 | struct ieee80211_local *local = sdata->local; | |
46900298 | 208 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
209 | struct sk_buff *skb; |
210 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 211 | |
65fc73ac | 212 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 213 | if (!skb) { |
ef422bc0 | 214 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
47846c9b | 215 | "deauth/disassoc frame\n", sdata->name); |
9ac19a90 JB |
216 | return; |
217 | } | |
218 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
219 | ||
220 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
221 | memset(mgmt, 0, 24); | |
77fdaa12 | 222 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 223 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 224 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 225 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 226 | skb_put(skb, 2); |
ef422bc0 | 227 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
228 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
229 | ||
53b46b84 | 230 | if (stype == IEEE80211_STYPE_DEAUTH) |
ce470613 HS |
231 | if (cookie) |
232 | __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
233 | else | |
234 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
53b46b84 | 235 | else |
ce470613 HS |
236 | if (cookie) |
237 | __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
238 | else | |
239 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
62ae67be JB |
240 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
241 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
242 | ieee80211_tx_skb(sdata, skb); | |
9ac19a90 JB |
243 | } |
244 | ||
572e0012 KV |
245 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
246 | struct ieee80211_sub_if_data *sdata) | |
247 | { | |
572e0012 KV |
248 | struct ieee80211_pspoll *pspoll; |
249 | struct sk_buff *skb; | |
572e0012 | 250 | |
d8cd189e KV |
251 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
252 | if (!skb) | |
572e0012 | 253 | return; |
572e0012 | 254 | |
d8cd189e KV |
255 | pspoll = (struct ieee80211_pspoll *) skb->data; |
256 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 257 | |
62ae67be JB |
258 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
259 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
260 | } |
261 | ||
965bedad JB |
262 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
263 | struct ieee80211_sub_if_data *sdata, | |
264 | int powersave) | |
265 | { | |
266 | struct sk_buff *skb; | |
d8cd189e | 267 | struct ieee80211_hdr_3addr *nullfunc; |
965bedad | 268 | |
d8cd189e KV |
269 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
270 | if (!skb) | |
965bedad | 271 | return; |
965bedad | 272 | |
d8cd189e | 273 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 274 | if (powersave) |
d8cd189e | 275 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 276 | |
62ae67be JB |
277 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
278 | ieee80211_tx_skb(sdata, skb); | |
965bedad JB |
279 | } |
280 | ||
d524215f FF |
281 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
282 | struct ieee80211_sub_if_data *sdata) | |
283 | { | |
284 | struct sk_buff *skb; | |
285 | struct ieee80211_hdr *nullfunc; | |
286 | __le16 fc; | |
287 | ||
288 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
289 | return; | |
290 | ||
291 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
292 | if (!skb) { | |
293 | printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr " | |
294 | "nullfunc frame\n", sdata->name); | |
295 | return; | |
296 | } | |
297 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
298 | ||
299 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
300 | memset(nullfunc, 0, 30); | |
301 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
302 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
303 | nullfunc->frame_control = fc; | |
304 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
305 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
306 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
307 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
308 | ||
309 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
310 | ieee80211_tx_skb(sdata, skb); | |
311 | } | |
312 | ||
cc32abd4 JB |
313 | /* spectrum management related things */ |
314 | static void ieee80211_chswitch_work(struct work_struct *work) | |
315 | { | |
316 | struct ieee80211_sub_if_data *sdata = | |
317 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
318 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
319 | ||
9607e6b6 | 320 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
321 | return; |
322 | ||
77fdaa12 JB |
323 | mutex_lock(&ifmgd->mtx); |
324 | if (!ifmgd->associated) | |
325 | goto out; | |
cc32abd4 JB |
326 | |
327 | sdata->local->oper_channel = sdata->local->csa_channel; | |
77fdaa12 JB |
328 | ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
329 | ||
cc32abd4 | 330 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 331 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 332 | |
cc32abd4 JB |
333 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
334 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
335 | out: |
336 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
337 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
338 | } |
339 | ||
340 | static void ieee80211_chswitch_timer(unsigned long data) | |
341 | { | |
342 | struct ieee80211_sub_if_data *sdata = | |
343 | (struct ieee80211_sub_if_data *) data; | |
344 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
345 | ||
5bb644a0 JB |
346 | if (sdata->local->quiescing) { |
347 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
348 | return; | |
349 | } | |
350 | ||
42935eca | 351 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
352 | } |
353 | ||
354 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
355 | struct ieee80211_channel_sw_ie *sw_elem, | |
356 | struct ieee80211_bss *bss) | |
357 | { | |
0c1ad2ca JB |
358 | struct cfg80211_bss *cbss = |
359 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
360 | struct ieee80211_channel *new_ch; |
361 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
362 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); | |
363 | ||
77fdaa12 JB |
364 | ASSERT_MGD_MTX(ifmgd); |
365 | ||
366 | if (!ifmgd->associated) | |
cc32abd4 JB |
367 | return; |
368 | ||
fbe9c429 | 369 | if (sdata->local->scanning) |
cc32abd4 JB |
370 | return; |
371 | ||
372 | /* Disregard subsequent beacons if we are already running a timer | |
373 | processing a CSA */ | |
374 | ||
375 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
376 | return; | |
377 | ||
378 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
379 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
380 | return; | |
381 | ||
382 | sdata->local->csa_channel = new_ch; | |
383 | ||
384 | if (sw_elem->count <= 1) { | |
42935eca | 385 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
386 | } else { |
387 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
388 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
389 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
390 | mod_timer(&ifmgd->chswitch_timer, | |
391 | jiffies + | |
392 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 393 | cbss->beacon_interval)); |
cc32abd4 JB |
394 | } |
395 | } | |
396 | ||
397 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
398 | u16 capab_info, u8 *pwr_constr_elem, | |
399 | u8 pwr_constr_elem_len) | |
400 | { | |
401 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
402 | ||
403 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
404 | return; | |
405 | ||
406 | /* Power constraint IE length should be 1 octet */ | |
407 | if (pwr_constr_elem_len != 1) | |
408 | return; | |
409 | ||
410 | if ((*pwr_constr_elem <= conf->channel->max_power) && | |
411 | (*pwr_constr_elem != sdata->local->power_constr_level)) { | |
412 | sdata->local->power_constr_level = *pwr_constr_elem; | |
413 | ieee80211_hw_config(sdata->local, 0); | |
414 | } | |
415 | } | |
416 | ||
965bedad JB |
417 | /* powersave */ |
418 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
419 | struct ieee80211_sub_if_data *sdata) | |
420 | { | |
421 | struct ieee80211_conf *conf = &local->hw.conf; | |
422 | ||
d5edaedc JB |
423 | /* |
424 | * If we are scanning right now then the parameters will | |
425 | * take effect when scan finishes. | |
426 | */ | |
fbe9c429 | 427 | if (local->scanning) |
d5edaedc JB |
428 | return; |
429 | ||
965bedad JB |
430 | if (conf->dynamic_ps_timeout > 0 && |
431 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
432 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
433 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
434 | } else { | |
435 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
436 | ieee80211_send_nullfunc(local, sdata, 1); | |
437 | conf->flags |= IEEE80211_CONF_PS; | |
438 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
439 | } | |
440 | } | |
441 | ||
442 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
443 | { | |
444 | struct ieee80211_conf *conf = &local->hw.conf; | |
445 | ||
446 | if (local->ps_sdata) { | |
965bedad JB |
447 | ieee80211_enable_ps(local, local->ps_sdata); |
448 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
449 | conf->flags &= ~IEEE80211_CONF_PS; | |
450 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
451 | del_timer_sync(&local->dynamic_ps_timer); | |
452 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
453 | } | |
454 | } | |
455 | ||
456 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 457 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
458 | { |
459 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
460 | int count = 0; | |
461 | ||
462 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
463 | local->ps_sdata = NULL; | |
464 | return; | |
465 | } | |
466 | ||
af6b6374 JB |
467 | if (!list_empty(&local->work_list)) { |
468 | local->ps_sdata = NULL; | |
469 | goto change; | |
470 | } | |
471 | ||
965bedad | 472 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 473 | if (!ieee80211_sdata_running(sdata)) |
965bedad JB |
474 | continue; |
475 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
476 | continue; | |
477 | found = sdata; | |
478 | count++; | |
479 | } | |
480 | ||
43f78531 | 481 | if (count == 1 && found->u.mgd.powersave && |
af6b6374 | 482 | found->u.mgd.associated && |
56007a02 | 483 | found->u.mgd.associated->beacon_ies && |
b291ba11 JB |
484 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
485 | IEEE80211_STA_CONNECTION_POLL))) { | |
10f644a4 JB |
486 | s32 beaconint_us; |
487 | ||
488 | if (latency < 0) | |
489 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
490 | ||
491 | beaconint_us = ieee80211_tu_to_usec( | |
492 | found->vif.bss_conf.beacon_int); | |
493 | ||
04fe2037 | 494 | if (beaconint_us > latency) { |
10f644a4 | 495 | local->ps_sdata = NULL; |
04fe2037 | 496 | } else { |
56007a02 | 497 | struct ieee80211_bss *bss; |
04fe2037 | 498 | int maxslp = 1; |
56007a02 | 499 | u8 dtimper; |
04fe2037 | 500 | |
56007a02 JB |
501 | bss = (void *)found->u.mgd.associated->priv; |
502 | dtimper = bss->dtim_period; | |
503 | ||
504 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
505 | if (!dtimper) | |
506 | dtimper = 1; | |
507 | else if (dtimper > 1) | |
04fe2037 JB |
508 | maxslp = min_t(int, dtimper, |
509 | latency / beaconint_us); | |
510 | ||
9ccebe61 | 511 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 512 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 513 | local->ps_sdata = found; |
04fe2037 | 514 | } |
10f644a4 | 515 | } else { |
965bedad | 516 | local->ps_sdata = NULL; |
10f644a4 | 517 | } |
965bedad | 518 | |
af6b6374 | 519 | change: |
965bedad JB |
520 | ieee80211_change_ps(local); |
521 | } | |
522 | ||
523 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
524 | { | |
525 | struct ieee80211_local *local = | |
526 | container_of(work, struct ieee80211_local, | |
527 | dynamic_ps_disable_work); | |
528 | ||
529 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
530 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
531 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
532 | } | |
533 | ||
534 | ieee80211_wake_queues_by_reason(&local->hw, | |
535 | IEEE80211_QUEUE_STOP_REASON_PS); | |
536 | } | |
537 | ||
538 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
539 | { | |
540 | struct ieee80211_local *local = | |
541 | container_of(work, struct ieee80211_local, | |
542 | dynamic_ps_enable_work); | |
543 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
544 | ||
545 | /* can only happen when PS was just disabled anyway */ | |
546 | if (!sdata) | |
547 | return; | |
548 | ||
549 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
550 | return; | |
551 | ||
552 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
553 | ieee80211_send_nullfunc(local, sdata, 1); | |
554 | ||
555 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
556 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
557 | } | |
558 | ||
559 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
560 | { | |
561 | struct ieee80211_local *local = (void *) data; | |
562 | ||
78f1a8b7 | 563 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
564 | return; |
565 | ||
42935eca | 566 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
567 | } |
568 | ||
60f8b39c | 569 | /* MLME */ |
f698d856 | 570 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 571 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
572 | u8 *wmm_param, size_t wmm_param_len) |
573 | { | |
f0706e82 JB |
574 | struct ieee80211_tx_queue_params params; |
575 | size_t left; | |
576 | int count; | |
ab13315a | 577 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 578 | |
af6b6374 | 579 | if (local->hw.queues < 4) |
3434fbd3 JB |
580 | return; |
581 | ||
582 | if (!wmm_param) | |
583 | return; | |
584 | ||
f0706e82 JB |
585 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
586 | return; | |
ab13315a KV |
587 | |
588 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
50ae0cf1 | 589 | uapsd_queues = local->uapsd_queues; |
ab13315a | 590 | |
f0706e82 | 591 | count = wmm_param[6] & 0x0f; |
46900298 | 592 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 593 | return; |
46900298 | 594 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
595 | |
596 | pos = wmm_param + 8; | |
597 | left = wmm_param_len - 8; | |
598 | ||
599 | memset(¶ms, 0, sizeof(params)); | |
600 | ||
f0706e82 JB |
601 | local->wmm_acm = 0; |
602 | for (; left >= 4; left -= 4, pos += 4) { | |
603 | int aci = (pos[0] >> 5) & 0x03; | |
604 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 605 | bool uapsd = false; |
f0706e82 JB |
606 | int queue; |
607 | ||
608 | switch (aci) { | |
0eeb59fe | 609 | case 1: /* AC_BK */ |
e100bb64 | 610 | queue = 3; |
988c0f72 | 611 | if (acm) |
0eeb59fe | 612 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
613 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
614 | uapsd = true; | |
f0706e82 | 615 | break; |
0eeb59fe | 616 | case 2: /* AC_VI */ |
e100bb64 | 617 | queue = 1; |
988c0f72 | 618 | if (acm) |
0eeb59fe | 619 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
620 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
621 | uapsd = true; | |
f0706e82 | 622 | break; |
0eeb59fe | 623 | case 3: /* AC_VO */ |
e100bb64 | 624 | queue = 0; |
988c0f72 | 625 | if (acm) |
0eeb59fe | 626 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
627 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
628 | uapsd = true; | |
f0706e82 | 629 | break; |
0eeb59fe | 630 | case 0: /* AC_BE */ |
f0706e82 | 631 | default: |
e100bb64 | 632 | queue = 2; |
988c0f72 | 633 | if (acm) |
0eeb59fe | 634 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
635 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
636 | uapsd = true; | |
f0706e82 JB |
637 | break; |
638 | } | |
639 | ||
640 | params.aifs = pos[0] & 0x0f; | |
641 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
642 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 643 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
644 | params.uapsd = uapsd; |
645 | ||
f4ea83dd | 646 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 647 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
ab13315a | 648 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
0bffe40f | 649 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
ab13315a KV |
650 | params.aifs, params.cw_min, params.cw_max, params.txop, |
651 | params.uapsd); | |
3330d7be | 652 | #endif |
24487981 | 653 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 654 | printk(KERN_DEBUG "%s: failed to set TX queue " |
0bffe40f JB |
655 | "parameters for queue %d\n", |
656 | wiphy_name(local->hw.wiphy), queue); | |
f0706e82 JB |
657 | } |
658 | } | |
659 | ||
7a5158ef JB |
660 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
661 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 662 | { |
bda3933a | 663 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 664 | u32 changed = 0; |
7a5158ef JB |
665 | bool use_protection; |
666 | bool use_short_preamble; | |
667 | bool use_short_slot; | |
668 | ||
669 | if (erp_valid) { | |
670 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
671 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
672 | } else { | |
673 | use_protection = false; | |
674 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
675 | } | |
676 | ||
677 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
678 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
679 | use_short_slot = true; | |
5628221c | 680 | |
471b3efd | 681 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
682 | bss_conf->use_cts_prot = use_protection; |
683 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 684 | } |
7e9ed188 | 685 | |
d43c7b37 | 686 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 687 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 688 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 689 | } |
d9430a32 | 690 | |
7a5158ef | 691 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
692 | bss_conf->use_short_slot = use_short_slot; |
693 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
694 | } |
695 | ||
696 | return changed; | |
697 | } | |
698 | ||
f698d856 | 699 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 700 | struct cfg80211_bss *cbss, |
ae5eb026 | 701 | u32 bss_info_changed) |
f0706e82 | 702 | { |
0c1ad2ca | 703 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 704 | struct ieee80211_local *local = sdata->local; |
d6f2da5b | 705 | |
ae5eb026 | 706 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 707 | /* set timing information */ |
0c1ad2ca JB |
708 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
709 | sdata->vif.bss_conf.timestamp = cbss->tsf; | |
5628221c | 710 | |
77fdaa12 JB |
711 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
712 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 713 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 714 | |
0c1ad2ca JB |
715 | sdata->u.mgd.associated = cbss; |
716 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 717 | |
b291ba11 JB |
718 | /* just to be sure */ |
719 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
720 | IEEE80211_STA_BEACON_POLL); | |
721 | ||
0183826b JB |
722 | /* |
723 | * Always handle WMM once after association regardless | |
724 | * of the first value the AP uses. Setting -1 here has | |
725 | * that effect because the AP values is an unsigned | |
726 | * 4-bit value. | |
727 | */ | |
728 | sdata->u.mgd.wmm_last_param_set = -1; | |
729 | ||
9ac19a90 | 730 | ieee80211_led_assoc(local, 1); |
9306102e | 731 | |
bda3933a | 732 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
733 | /* |
734 | * For now just always ask the driver to update the basic rateset | |
735 | * when we have associated, we aren't checking whether it actually | |
736 | * changed or not. | |
737 | */ | |
ae5eb026 | 738 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
739 | |
740 | /* And the BSSID changed - we're associated now */ | |
741 | bss_info_changed |= BSS_CHANGED_BSSID; | |
742 | ||
ae5eb026 | 743 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 744 | |
056508dc JB |
745 | mutex_lock(&local->iflist_mtx); |
746 | ieee80211_recalc_ps(local, -1); | |
0f78231b | 747 | ieee80211_recalc_smps(local, sdata); |
056508dc | 748 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 749 | |
8a5b33f5 | 750 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 751 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
752 | } |
753 | ||
63f170e0 | 754 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) |
aa458d17 | 755 | { |
46900298 | 756 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
757 | struct ieee80211_local *local = sdata->local; |
758 | struct sta_info *sta; | |
e0cb686f | 759 | u32 changed = 0, config_changed = 0; |
b291ba11 | 760 | u8 bssid[ETH_ALEN]; |
aa458d17 | 761 | |
77fdaa12 JB |
762 | ASSERT_MGD_MTX(ifmgd); |
763 | ||
b291ba11 JB |
764 | if (WARN_ON(!ifmgd->associated)) |
765 | return; | |
766 | ||
0c1ad2ca | 767 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 768 | |
77fdaa12 JB |
769 | ifmgd->associated = NULL; |
770 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
771 | ||
772 | /* | |
773 | * we need to commit the associated = NULL change because the | |
774 | * scan code uses that to determine whether this iface should | |
775 | * go to/wake up from powersave or not -- and could otherwise | |
776 | * wake the queues erroneously. | |
777 | */ | |
778 | smp_mb(); | |
779 | ||
780 | /* | |
781 | * Thus, we can only afterwards stop the queues -- to account | |
782 | * for the case where another CPU is finishing a scan at this | |
783 | * time -- we don't want the scan code to enable queues. | |
784 | */ | |
aa458d17 | 785 | |
8a5b33f5 | 786 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
787 | netif_carrier_off(sdata->dev); |
788 | ||
1fa6f4af | 789 | rcu_read_lock(); |
abe60632 | 790 | sta = sta_info_get(sdata, bssid); |
1fa6f4af JB |
791 | if (sta) |
792 | ieee80211_sta_tear_down_BA_sessions(sta); | |
793 | rcu_read_unlock(); | |
aa458d17 | 794 | |
f5e5bf25 TW |
795 | changed |= ieee80211_reset_erp_info(sdata); |
796 | ||
f5e5bf25 | 797 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
798 | changed |= BSS_CHANGED_ASSOC; |
799 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 800 | |
aa837e1d JB |
801 | ieee80211_set_wmm_default(sdata); |
802 | ||
4797938c | 803 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 804 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 805 | |
413ad50a JB |
806 | /* on the next assoc, re-program HT parameters */ |
807 | sdata->ht_opmode_valid = false; | |
808 | ||
a8302de9 VT |
809 | local->power_constr_level = 0; |
810 | ||
520eb820 KV |
811 | del_timer_sync(&local->dynamic_ps_timer); |
812 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
813 | ||
e0cb686f KV |
814 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
815 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
816 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
817 | } | |
ae5eb026 | 818 | |
e0cb686f | 819 | ieee80211_hw_config(local, config_changed); |
9cef8737 JB |
820 | |
821 | /* And the BSSID changed -- not very interesting here */ | |
822 | changed |= BSS_CHANGED_BSSID; | |
ae5eb026 | 823 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 824 | |
34e89507 | 825 | sta_info_destroy_addr(sdata, bssid); |
aa458d17 | 826 | } |
f0706e82 | 827 | |
3cf335d5 KV |
828 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
829 | struct ieee80211_hdr *hdr) | |
830 | { | |
831 | /* | |
832 | * We can postpone the mgd.timer whenever receiving unicast frames | |
833 | * from AP because we know that the connection is working both ways | |
834 | * at that time. But multicast frames (and hence also beacons) must | |
835 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
836 | * data idle periods for sending the periodic probe request to the |
837 | * AP we're connected to. | |
3cf335d5 | 838 | */ |
b291ba11 JB |
839 | if (is_multicast_ether_addr(hdr->addr1)) |
840 | return; | |
841 | ||
842 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
843 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
3cf335d5 | 844 | } |
f0706e82 | 845 | |
a43abf29 ML |
846 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
847 | { | |
848 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
849 | const u8 *ssid; | |
850 | ||
0c1ad2ca JB |
851 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
852 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, | |
a43abf29 ML |
853 | ssid + 2, ssid[1], NULL, 0); |
854 | ||
855 | ifmgd->probe_send_count++; | |
856 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; | |
857 | run_again(ifmgd, ifmgd->probe_timeout); | |
858 | } | |
859 | ||
b291ba11 JB |
860 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
861 | bool beacon) | |
04de8381 | 862 | { |
04de8381 | 863 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 864 | bool already = false; |
34bfc411 | 865 | |
9607e6b6 | 866 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
867 | return; |
868 | ||
91a3bd76 LR |
869 | if (sdata->local->scanning) |
870 | return; | |
871 | ||
b8bc4b0a JB |
872 | if (sdata->local->tmp_channel) |
873 | return; | |
874 | ||
77fdaa12 JB |
875 | mutex_lock(&ifmgd->mtx); |
876 | ||
877 | if (!ifmgd->associated) | |
878 | goto out; | |
879 | ||
a860402d | 880 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b291ba11 JB |
881 | if (beacon && net_ratelimit()) |
882 | printk(KERN_DEBUG "%s: detected beacon loss from AP " | |
47846c9b | 883 | "- sending probe request\n", sdata->name); |
a860402d | 884 | #endif |
04de8381 | 885 | |
b291ba11 JB |
886 | /* |
887 | * The driver/our work has already reported this event or the | |
888 | * connection monitoring has kicked in and we have already sent | |
889 | * a probe request. Or maybe the AP died and the driver keeps | |
890 | * reporting until we disassociate... | |
891 | * | |
892 | * In either case we have to ignore the current call to this | |
893 | * function (except for setting the correct probe reason bit) | |
894 | * because otherwise we would reset the timer every time and | |
895 | * never check whether we received a probe response! | |
896 | */ | |
897 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
898 | IEEE80211_STA_CONNECTION_POLL)) | |
899 | already = true; | |
900 | ||
901 | if (beacon) | |
902 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
903 | else | |
904 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
905 | ||
906 | if (already) | |
907 | goto out; | |
908 | ||
4e751843 JB |
909 | mutex_lock(&sdata->local->iflist_mtx); |
910 | ieee80211_recalc_ps(sdata->local, -1); | |
911 | mutex_unlock(&sdata->local->iflist_mtx); | |
912 | ||
a43abf29 ML |
913 | ifmgd->probe_send_count = 0; |
914 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
915 | out: |
916 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
917 | } |
918 | ||
b291ba11 JB |
919 | void ieee80211_beacon_loss_work(struct work_struct *work) |
920 | { | |
921 | struct ieee80211_sub_if_data *sdata = | |
922 | container_of(work, struct ieee80211_sub_if_data, | |
923 | u.mgd.beacon_loss_work); | |
924 | ||
925 | ieee80211_mgd_probe_ap(sdata, true); | |
926 | } | |
927 | ||
04de8381 KV |
928 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
929 | { | |
930 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
931 | ||
42935eca | 932 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
04de8381 KV |
933 | } |
934 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
935 | ||
77fdaa12 JB |
936 | static enum rx_mgmt_action __must_check |
937 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 938 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 939 | { |
46900298 | 940 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 941 | const u8 *bssid = NULL; |
f0706e82 JB |
942 | u16 reason_code; |
943 | ||
f4ea83dd | 944 | if (len < 24 + 2) |
77fdaa12 | 945 | return RX_MGMT_NONE; |
f0706e82 | 946 | |
77fdaa12 JB |
947 | ASSERT_MGD_MTX(ifmgd); |
948 | ||
0c1ad2ca | 949 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
950 | |
951 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
952 | ||
77fdaa12 | 953 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 954 | sdata->name, bssid, reason_code); |
77fdaa12 | 955 | |
63f170e0 JB |
956 | ieee80211_set_disassoc(sdata); |
957 | ieee80211_recalc_idle(sdata->local); | |
f0706e82 | 958 | |
77fdaa12 | 959 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
960 | } |
961 | ||
962 | ||
77fdaa12 JB |
963 | static enum rx_mgmt_action __must_check |
964 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
965 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 966 | { |
46900298 | 967 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
968 | u16 reason_code; |
969 | ||
f4ea83dd | 970 | if (len < 24 + 2) |
77fdaa12 | 971 | return RX_MGMT_NONE; |
f0706e82 | 972 | |
77fdaa12 JB |
973 | ASSERT_MGD_MTX(ifmgd); |
974 | ||
975 | if (WARN_ON(!ifmgd->associated)) | |
976 | return RX_MGMT_NONE; | |
977 | ||
0c1ad2ca | 978 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
77fdaa12 | 979 | return RX_MGMT_NONE; |
f0706e82 JB |
980 | |
981 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
982 | ||
0ff71613 | 983 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 984 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 985 | |
63f170e0 | 986 | ieee80211_set_disassoc(sdata); |
bc83b681 | 987 | ieee80211_recalc_idle(sdata->local); |
77fdaa12 | 988 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
989 | } |
990 | ||
991 | ||
af6b6374 JB |
992 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
993 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 994 | { |
af6b6374 | 995 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
46900298 | 996 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 997 | struct ieee80211_local *local = sdata->local; |
8318d78a | 998 | struct ieee80211_supported_band *sband; |
f0706e82 | 999 | struct sta_info *sta; |
0c1ad2ca | 1000 | struct cfg80211_bss *cbss = wk->assoc.bss; |
af6b6374 | 1001 | u8 *pos; |
881d948c | 1002 | u32 rates, basic_rates; |
af6b6374 | 1003 | u16 capab_info, aid; |
f0706e82 | 1004 | struct ieee802_11_elems elems; |
bda3933a | 1005 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1006 | u32 changed = 0; |
5d1ec85f JB |
1007 | int i, j, err; |
1008 | bool have_higher_than_11mbit = false; | |
ae5eb026 | 1009 | u16 ap_ht_cap_flags; |
f0706e82 | 1010 | |
af6b6374 | 1011 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1012 | |
f0706e82 | 1013 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1014 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1015 | |
1dd84aa2 JB |
1016 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1017 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
47846c9b | 1018 | "set\n", sdata->name, aid); |
1dd84aa2 JB |
1019 | aid &= ~(BIT(15) | BIT(14)); |
1020 | ||
af6b6374 JB |
1021 | pos = mgmt->u.assoc_resp.variable; |
1022 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1023 | ||
f0706e82 JB |
1024 | if (!elems.supp_rates) { |
1025 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 1026 | sdata->name); |
af6b6374 | 1027 | return false; |
f0706e82 JB |
1028 | } |
1029 | ||
46900298 | 1030 | ifmgd->aid = aid; |
f0706e82 | 1031 | |
0c1ad2ca | 1032 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
f0706e82 | 1033 | if (!sta) { |
5d1ec85f JB |
1034 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1035 | " the AP\n", sdata->name); | |
af6b6374 | 1036 | return false; |
77fdaa12 | 1037 | } |
05e5e883 | 1038 | |
5d1ec85f JB |
1039 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1040 | WLAN_STA_ASSOC_AP); | |
1041 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1042 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
1043 | ||
60f8b39c JB |
1044 | rates = 0; |
1045 | basic_rates = 0; | |
1046 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1047 | |
60f8b39c JB |
1048 | for (i = 0; i < elems.supp_rates_len; i++) { |
1049 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1050 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1051 | |
60f8b39c JB |
1052 | if (rate > 110) |
1053 | have_higher_than_11mbit = true; | |
1054 | ||
1055 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1056 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1057 | rates |= BIT(j); |
d61272cb TW |
1058 | if (is_basic) |
1059 | basic_rates |= BIT(j); | |
1060 | break; | |
1061 | } | |
f709fc69 | 1062 | } |
f709fc69 LCC |
1063 | } |
1064 | ||
60f8b39c JB |
1065 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1066 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1067 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1068 | |
60f8b39c JB |
1069 | if (rate > 110) |
1070 | have_higher_than_11mbit = true; | |
f0706e82 | 1071 | |
60f8b39c | 1072 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1073 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1074 | rates |= BIT(j); |
d61272cb TW |
1075 | if (is_basic) |
1076 | basic_rates |= BIT(j); | |
1077 | break; | |
1078 | } | |
60f8b39c | 1079 | } |
1ebebea8 | 1080 | } |
f0706e82 | 1081 | |
323ce79a | 1082 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1083 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1084 | |
1085 | /* cf. IEEE 802.11 9.2.12 */ | |
1086 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1087 | have_higher_than_11mbit) | |
1088 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1089 | else | |
1090 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1091 | |
ab1faead | 1092 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1093 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1094 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1095 | |
1096 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1097 | |
4b7679a5 | 1098 | rate_control_rate_init(sta); |
f0706e82 | 1099 | |
46900298 | 1100 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1101 | set_sta_flags(sta, WLAN_STA_MFP); |
1102 | ||
ddf4ac53 | 1103 | if (elems.wmm_param) |
60f8b39c | 1104 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 | 1105 | |
5d1ec85f JB |
1106 | err = sta_info_insert(sta); |
1107 | sta = NULL; | |
1108 | if (err) { | |
1109 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1110 | " the AP (error %d)\n", sdata->name, err); | |
90be561b | 1111 | return false; |
ddf4ac53 JB |
1112 | } |
1113 | ||
ddf4ac53 | 1114 | if (elems.wmm_param) |
46900298 | 1115 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1116 | elems.wmm_param_len); |
aa837e1d JB |
1117 | else |
1118 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1119 | |
e4da8c37 JB |
1120 | local->oper_channel = wk->chan; |
1121 | ||
ae5eb026 | 1122 | if (elems.ht_info_elem && elems.wmm_param && |
af6b6374 | 1123 | (sdata->local->hw.queues >= 4) && |
ab1faead | 1124 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1125 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
0c1ad2ca | 1126 | cbss->bssid, ap_ht_cap_flags); |
ae5eb026 | 1127 | |
60f8b39c JB |
1128 | /* set AID and assoc capability, |
1129 | * ieee80211_set_associated() will tell the driver */ | |
1130 | bss_conf->aid = aid; | |
1131 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 1132 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 1133 | |
d524215f FF |
1134 | /* |
1135 | * If we're using 4-addr mode, let the AP know that we're | |
1136 | * doing so, so that it can create the STA VLAN on its side | |
1137 | */ | |
1138 | if (ifmgd->use_4addr) | |
1139 | ieee80211_send_4addr_nullfunc(local, sdata); | |
1140 | ||
15b7b062 | 1141 | /* |
b291ba11 JB |
1142 | * Start timer to probe the connection to the AP now. |
1143 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 1144 | */ |
b291ba11 JB |
1145 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1146 | mod_beacon_timer(sdata); | |
15b7b062 | 1147 | |
af6b6374 | 1148 | return true; |
f0706e82 JB |
1149 | } |
1150 | ||
1151 | ||
98c8fccf JB |
1152 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1153 | struct ieee80211_mgmt *mgmt, | |
1154 | size_t len, | |
1155 | struct ieee80211_rx_status *rx_status, | |
1156 | struct ieee802_11_elems *elems, | |
1157 | bool beacon) | |
1158 | { | |
1159 | struct ieee80211_local *local = sdata->local; | |
1160 | int freq; | |
c2b13452 | 1161 | struct ieee80211_bss *bss; |
98c8fccf | 1162 | struct ieee80211_channel *channel; |
56007a02 JB |
1163 | bool need_ps = false; |
1164 | ||
1165 | if (sdata->u.mgd.associated) { | |
1166 | bss = (void *)sdata->u.mgd.associated->priv; | |
1167 | /* not previously set so we may need to recalc */ | |
1168 | need_ps = !bss->dtim_period; | |
1169 | } | |
98c8fccf JB |
1170 | |
1171 | if (elems->ds_params && elems->ds_params_len == 1) | |
1172 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1173 | else | |
1174 | freq = rx_status->freq; | |
1175 | ||
1176 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1177 | ||
1178 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1179 | return; | |
1180 | ||
98c8fccf | 1181 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1182 | channel, beacon); |
77fdaa12 JB |
1183 | if (bss) |
1184 | ieee80211_rx_bss_put(local, bss); | |
1185 | ||
1186 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
1187 | return; |
1188 | ||
56007a02 JB |
1189 | if (need_ps) { |
1190 | mutex_lock(&local->iflist_mtx); | |
1191 | ieee80211_recalc_ps(local, -1); | |
1192 | mutex_unlock(&local->iflist_mtx); | |
1193 | } | |
1194 | ||
c481ec97 | 1195 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 1196 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 1197 | ETH_ALEN) == 0)) { |
c481ec97 S |
1198 | struct ieee80211_channel_sw_ie *sw_elem = |
1199 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
cc32abd4 | 1200 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
c481ec97 | 1201 | } |
f0706e82 JB |
1202 | } |
1203 | ||
1204 | ||
f698d856 | 1205 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 1206 | struct sk_buff *skb) |
f0706e82 | 1207 | { |
af6b6374 | 1208 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 1209 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
1210 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1211 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
1212 | struct ieee802_11_elems elems; |
1213 | ||
15b7b062 KV |
1214 | ifmgd = &sdata->u.mgd; |
1215 | ||
77fdaa12 JB |
1216 | ASSERT_MGD_MTX(ifmgd); |
1217 | ||
47846c9b | 1218 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
8e7cdbb6 TW |
1219 | return; /* ignore ProbeResp to foreign address */ |
1220 | ||
ae6a44e3 EK |
1221 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1222 | if (baselen > len) | |
1223 | return; | |
1224 | ||
1225 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1226 | &elems); | |
1227 | ||
98c8fccf | 1228 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 1229 | |
77fdaa12 | 1230 | if (ifmgd->associated && |
0c1ad2ca | 1231 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
b291ba11 JB |
1232 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1233 | IEEE80211_STA_CONNECTION_POLL)) { | |
1234 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1235 | IEEE80211_STA_BEACON_POLL); | |
4e751843 JB |
1236 | mutex_lock(&sdata->local->iflist_mtx); |
1237 | ieee80211_recalc_ps(sdata->local, -1); | |
1238 | mutex_unlock(&sdata->local->iflist_mtx); | |
b291ba11 JB |
1239 | /* |
1240 | * We've received a probe response, but are not sure whether | |
1241 | * we have or will be receiving any beacons or data, so let's | |
1242 | * schedule the timers again, just in case. | |
1243 | */ | |
1244 | mod_beacon_timer(sdata); | |
1245 | mod_timer(&ifmgd->conn_mon_timer, | |
1246 | round_jiffies_up(jiffies + | |
1247 | IEEE80211_CONNECTION_IDLE_TIME)); | |
4e751843 | 1248 | } |
f0706e82 JB |
1249 | } |
1250 | ||
d91f36db JB |
1251 | /* |
1252 | * This is the canonical list of information elements we care about, | |
1253 | * the filter code also gives us all changes to the Microsoft OUI | |
1254 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1255 | * | |
1256 | * We implement beacon filtering in software since that means we can | |
1257 | * avoid processing the frame here and in cfg80211, and userspace | |
1258 | * will not be able to tell whether the hardware supports it or not. | |
1259 | * | |
1260 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1261 | * add items it requires. It also needs to be able to tell us to | |
1262 | * look out for other vendor IEs. | |
1263 | */ | |
1264 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1265 | (1ULL << WLAN_EID_COUNTRY) | |
1266 | (1ULL << WLAN_EID_ERP_INFO) | | |
1267 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1268 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1269 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1270 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1271 | |
f698d856 | 1272 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1273 | struct ieee80211_mgmt *mgmt, |
1274 | size_t len, | |
1275 | struct ieee80211_rx_status *rx_status) | |
1276 | { | |
d91f36db | 1277 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1278 | size_t baselen; |
1279 | struct ieee802_11_elems elems; | |
f698d856 | 1280 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1281 | u32 changed = 0; |
d91f36db | 1282 | bool erp_valid, directed_tim = false; |
7a5158ef | 1283 | u8 erp_value = 0; |
d91f36db | 1284 | u32 ncrc; |
77fdaa12 JB |
1285 | u8 *bssid; |
1286 | ||
1287 | ASSERT_MGD_MTX(ifmgd); | |
f0706e82 | 1288 | |
ae6a44e3 EK |
1289 | /* Process beacon from the current BSS */ |
1290 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1291 | if (baselen > len) | |
1292 | return; | |
1293 | ||
d91f36db | 1294 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1295 | return; |
f0706e82 | 1296 | |
b291ba11 JB |
1297 | /* |
1298 | * We might have received a number of frames, among them a | |
1299 | * disassoc frame and a beacon... | |
1300 | */ | |
1301 | if (!ifmgd->associated) | |
77fdaa12 JB |
1302 | return; |
1303 | ||
0c1ad2ca | 1304 | bssid = ifmgd->associated->bssid; |
77fdaa12 | 1305 | |
b291ba11 JB |
1306 | /* |
1307 | * And in theory even frames from a different AP we were just | |
1308 | * associated to a split-second ago! | |
1309 | */ | |
1310 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1311 | return; |
1312 | ||
b291ba11 | 1313 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 JM |
1314 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1315 | if (net_ratelimit()) { | |
1316 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
47846c9b | 1317 | "to a received beacon\n", sdata->name); |
92778180 JM |
1318 | } |
1319 | #endif | |
b291ba11 | 1320 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
1321 | mutex_lock(&local->iflist_mtx); |
1322 | ieee80211_recalc_ps(local, -1); | |
1323 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
1324 | } |
1325 | ||
b291ba11 JB |
1326 | /* |
1327 | * Push the beacon loss detection into the future since | |
1328 | * we are processing a beacon from the AP just now. | |
1329 | */ | |
1330 | mod_beacon_timer(sdata); | |
1331 | ||
d91f36db JB |
1332 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1333 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1334 | len - baselen, &elems, | |
1335 | care_about_ies, ncrc); | |
1336 | ||
1337 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1338 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1339 | ifmgd->aid); | |
d91f36db | 1340 | |
30196673 JM |
1341 | if (ncrc != ifmgd->beacon_crc) { |
1342 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, | |
1343 | true); | |
d91f36db | 1344 | |
30196673 JM |
1345 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1346 | elems.wmm_param_len); | |
1347 | } | |
fe3fa827 | 1348 | |
25c9c875 | 1349 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1350 | if (directed_tim) { |
572e0012 KV |
1351 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1352 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1353 | ieee80211_hw_config(local, | |
1354 | IEEE80211_CONF_CHANGE_PS); | |
1355 | ieee80211_send_nullfunc(local, sdata, 0); | |
1356 | } else { | |
1357 | local->pspolling = true; | |
1358 | ||
1359 | /* | |
1360 | * Here is assumed that the driver will be | |
1361 | * able to send ps-poll frame and receive a | |
1362 | * response even though power save mode is | |
1363 | * enabled, but some drivers might require | |
1364 | * to disable power save here. This needs | |
1365 | * to be investigated. | |
1366 | */ | |
1367 | ieee80211_send_pspoll(local, sdata); | |
1368 | } | |
a97b77b9 VN |
1369 | } |
1370 | } | |
7a5158ef | 1371 | |
30196673 JM |
1372 | if (ncrc == ifmgd->beacon_crc) |
1373 | return; | |
1374 | ifmgd->beacon_crc = ncrc; | |
1375 | ||
7a5158ef JB |
1376 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1377 | erp_valid = true; | |
1378 | erp_value = elems.erp_info[0]; | |
1379 | } else { | |
1380 | erp_valid = false; | |
50c4afb9 | 1381 | } |
7a5158ef JB |
1382 | changed |= ieee80211_handle_bss_capability(sdata, |
1383 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1384 | erp_valid, erp_value); | |
f0706e82 | 1385 | |
d3c990fb | 1386 | |
53d6f81c | 1387 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 1388 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
1389 | struct sta_info *sta; |
1390 | struct ieee80211_supported_band *sband; | |
1391 | u16 ap_ht_cap_flags; | |
1392 | ||
1393 | rcu_read_lock(); | |
1394 | ||
abe60632 | 1395 | sta = sta_info_get(sdata, bssid); |
77fdaa12 | 1396 | if (WARN_ON(!sta)) { |
ae5eb026 JB |
1397 | rcu_read_unlock(); |
1398 | return; | |
1399 | } | |
1400 | ||
1401 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1402 | ||
1403 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1404 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1405 | ||
1406 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1407 | ||
1408 | rcu_read_unlock(); | |
1409 | ||
1410 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
77fdaa12 | 1411 | bssid, ap_ht_cap_flags); |
d3c990fb RR |
1412 | } |
1413 | ||
8b19e6ca | 1414 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 1415 | if (elems.country_elem) { |
a8302de9 VT |
1416 | /* TODO: IBSS also needs this */ |
1417 | if (elems.pwr_constr_elem) | |
1418 | ieee80211_handle_pwr_constr(sdata, | |
1419 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1420 | elems.pwr_constr_elem, | |
1421 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1422 | } |
1423 | ||
471b3efd | 1424 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1425 | } |
1426 | ||
46900298 | 1427 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
f1d58c25 | 1428 | struct sk_buff *skb) |
f0706e82 | 1429 | { |
f698d856 | 1430 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1431 | struct ieee80211_mgmt *mgmt; |
1432 | u16 fc; | |
1433 | ||
1434 | if (skb->len < 24) | |
46900298 | 1435 | return RX_DROP_MONITOR; |
f0706e82 JB |
1436 | |
1437 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1438 | fc = le16_to_cpu(mgmt->frame_control); | |
1439 | ||
1440 | switch (fc & IEEE80211_FCTL_STYPE) { | |
f0706e82 JB |
1441 | case IEEE80211_STYPE_PROBE_RESP: |
1442 | case IEEE80211_STYPE_BEACON: | |
f0706e82 JB |
1443 | case IEEE80211_STYPE_DEAUTH: |
1444 | case IEEE80211_STYPE_DISASSOC: | |
77fdaa12 | 1445 | case IEEE80211_STYPE_ACTION: |
46900298 | 1446 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
42935eca | 1447 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
46900298 | 1448 | return RX_QUEUED; |
f0706e82 JB |
1449 | } |
1450 | ||
46900298 | 1451 | return RX_DROP_MONITOR; |
f0706e82 JB |
1452 | } |
1453 | ||
f698d856 | 1454 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1455 | struct sk_buff *skb) |
1456 | { | |
77fdaa12 | 1457 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 1458 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 1459 | struct ieee80211_mgmt *mgmt; |
77fdaa12 | 1460 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
1461 | u16 fc; |
1462 | ||
f0706e82 JB |
1463 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1464 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1465 | fc = le16_to_cpu(mgmt->frame_control); | |
1466 | ||
77fdaa12 JB |
1467 | mutex_lock(&ifmgd->mtx); |
1468 | ||
1469 | if (ifmgd->associated && | |
0c1ad2ca | 1470 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
77fdaa12 JB |
1471 | switch (fc & IEEE80211_FCTL_STYPE) { |
1472 | case IEEE80211_STYPE_BEACON: | |
1473 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1474 | rx_status); | |
1475 | break; | |
1476 | case IEEE80211_STYPE_PROBE_RESP: | |
af6b6374 | 1477 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
77fdaa12 JB |
1478 | break; |
1479 | case IEEE80211_STYPE_DEAUTH: | |
63f170e0 | 1480 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
77fdaa12 JB |
1481 | break; |
1482 | case IEEE80211_STYPE_DISASSOC: | |
1483 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1484 | break; | |
1485 | case IEEE80211_STYPE_ACTION: | |
d7907448 FF |
1486 | if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
1487 | break; | |
1488 | ||
77fdaa12 JB |
1489 | ieee80211_sta_process_chanswitch(sdata, |
1490 | &mgmt->u.action.u.chan_switch.sw_elem, | |
0c1ad2ca | 1491 | (void *)ifmgd->associated->priv); |
77fdaa12 JB |
1492 | break; |
1493 | } | |
1494 | mutex_unlock(&ifmgd->mtx); | |
1495 | ||
1496 | switch (rma) { | |
1497 | case RX_MGMT_NONE: | |
1498 | /* no action */ | |
1499 | break; | |
1500 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 1501 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1502 | break; |
1503 | case RX_MGMT_CFG80211_DISASSOC: | |
ce470613 | 1504 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1505 | break; |
1506 | default: | |
1507 | WARN(1, "unexpected: %d", rma); | |
1508 | } | |
1509 | goto out; | |
1510 | } | |
1511 | ||
77fdaa12 JB |
1512 | mutex_unlock(&ifmgd->mtx); |
1513 | ||
63f170e0 | 1514 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
af6b6374 | 1515 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) |
ce470613 | 1516 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
f0706e82 | 1517 | |
77fdaa12 | 1518 | out: |
f0706e82 JB |
1519 | kfree_skb(skb); |
1520 | } | |
1521 | ||
9c6bd790 | 1522 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1523 | { |
60f8b39c JB |
1524 | struct ieee80211_sub_if_data *sdata = |
1525 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1526 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1527 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1528 | |
5bb644a0 JB |
1529 | if (local->quiescing) { |
1530 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1531 | return; | |
1532 | } | |
1533 | ||
42935eca | 1534 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
f0706e82 JB |
1535 | } |
1536 | ||
9c6bd790 JB |
1537 | static void ieee80211_sta_work(struct work_struct *work) |
1538 | { | |
1539 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1540 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1541 | struct ieee80211_local *local = sdata->local; |
46900298 | 1542 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1543 | struct sk_buff *skb; |
1544 | ||
9607e6b6 | 1545 | if (!ieee80211_sdata_running(sdata)) |
9c6bd790 JB |
1546 | return; |
1547 | ||
fbe9c429 | 1548 | if (local->scanning) |
9c6bd790 JB |
1549 | return; |
1550 | ||
46900298 | 1551 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1552 | return; |
5bb644a0 JB |
1553 | |
1554 | /* | |
42935eca LR |
1555 | * ieee80211_queue_work() should have picked up most cases, |
1556 | * here we'll pick the the rest. | |
5bb644a0 | 1557 | */ |
42935eca LR |
1558 | if (WARN(local->suspended, "STA MLME work scheduled while " |
1559 | "going to suspend\n")) | |
5bb644a0 JB |
1560 | return; |
1561 | ||
46900298 | 1562 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1563 | |
77fdaa12 | 1564 | /* first process frames to avoid timing out while a frame is pending */ |
46900298 | 1565 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1566 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1567 | ||
77fdaa12 JB |
1568 | /* then process the rest of the work */ |
1569 | mutex_lock(&ifmgd->mtx); | |
1570 | ||
b291ba11 JB |
1571 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1572 | IEEE80211_STA_CONNECTION_POLL) && | |
1573 | ifmgd->associated) { | |
a43abf29 ML |
1574 | u8 bssid[ETH_ALEN]; |
1575 | ||
0c1ad2ca | 1576 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 JB |
1577 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1578 | run_again(ifmgd, ifmgd->probe_timeout); | |
a43abf29 ML |
1579 | |
1580 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { | |
1581 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1582 | printk(KERN_DEBUG "No probe response from AP %pM" | |
1583 | " after %dms, try %d\n", bssid, | |
1584 | (1000 * IEEE80211_PROBE_WAIT)/HZ, | |
1585 | ifmgd->probe_send_count); | |
1586 | #endif | |
1587 | ieee80211_mgd_probe_ap_send(sdata); | |
1588 | } else { | |
b291ba11 JB |
1589 | /* |
1590 | * We actually lost the connection ... or did we? | |
1591 | * Let's make sure! | |
1592 | */ | |
1593 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1594 | IEEE80211_STA_BEACON_POLL); | |
b291ba11 JB |
1595 | printk(KERN_DEBUG "No probe response from AP %pM" |
1596 | " after %dms, disconnecting.\n", | |
1597 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); | |
63f170e0 | 1598 | ieee80211_set_disassoc(sdata); |
bc83b681 | 1599 | ieee80211_recalc_idle(local); |
b291ba11 JB |
1600 | mutex_unlock(&ifmgd->mtx); |
1601 | /* | |
1602 | * must be outside lock due to cfg80211, | |
1603 | * but that's not a problem. | |
1604 | */ | |
1605 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1606 | IEEE80211_STYPE_DEAUTH, | |
1607 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
1608 | NULL); | |
1609 | mutex_lock(&ifmgd->mtx); | |
1610 | } | |
1611 | } | |
1612 | ||
77fdaa12 | 1613 | mutex_unlock(&ifmgd->mtx); |
f0706e82 JB |
1614 | } |
1615 | ||
b291ba11 JB |
1616 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1617 | { | |
1618 | struct ieee80211_sub_if_data *sdata = | |
1619 | (struct ieee80211_sub_if_data *) data; | |
1620 | struct ieee80211_local *local = sdata->local; | |
1621 | ||
1622 | if (local->quiescing) | |
1623 | return; | |
1624 | ||
42935eca | 1625 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
b291ba11 JB |
1626 | } |
1627 | ||
1628 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
1629 | { | |
1630 | struct ieee80211_sub_if_data *sdata = | |
1631 | (struct ieee80211_sub_if_data *) data; | |
1632 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1633 | struct ieee80211_local *local = sdata->local; | |
1634 | ||
1635 | if (local->quiescing) | |
1636 | return; | |
1637 | ||
42935eca | 1638 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
1639 | } |
1640 | ||
1641 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
1642 | { | |
1643 | struct ieee80211_sub_if_data *sdata = | |
1644 | container_of(work, struct ieee80211_sub_if_data, | |
1645 | u.mgd.monitor_work); | |
1646 | ||
1647 | ieee80211_mgd_probe_ap(sdata, false); | |
1648 | } | |
1649 | ||
9c6bd790 JB |
1650 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1651 | { | |
ad935687 | 1652 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
1653 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1654 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 1655 | |
b291ba11 | 1656 | /* let's probe the connection once */ |
42935eca | 1657 | ieee80211_queue_work(&sdata->local->hw, |
b291ba11 JB |
1658 | &sdata->u.mgd.monitor_work); |
1659 | /* and do all the other regular work too */ | |
42935eca | 1660 | ieee80211_queue_work(&sdata->local->hw, |
46900298 | 1661 | &sdata->u.mgd.work); |
ad935687 | 1662 | } |
9c6bd790 | 1663 | } |
f0706e82 | 1664 | |
5bb644a0 JB |
1665 | #ifdef CONFIG_PM |
1666 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
1667 | { | |
1668 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1669 | ||
1670 | /* | |
1671 | * we need to use atomic bitops for the running bits | |
1672 | * only because both timers might fire at the same | |
1673 | * time -- the code here is properly synchronised. | |
1674 | */ | |
1675 | ||
1676 | cancel_work_sync(&ifmgd->work); | |
1677 | cancel_work_sync(&ifmgd->beacon_loss_work); | |
1678 | if (del_timer_sync(&ifmgd->timer)) | |
1679 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1680 | ||
1681 | cancel_work_sync(&ifmgd->chswitch_work); | |
1682 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
1683 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 JB |
1684 | |
1685 | cancel_work_sync(&ifmgd->monitor_work); | |
1686 | /* these will just be re-established on connection */ | |
1687 | del_timer_sync(&ifmgd->conn_mon_timer); | |
1688 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
1689 | } |
1690 | ||
1691 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
1692 | { | |
1693 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1694 | ||
1695 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) | |
1696 | add_timer(&ifmgd->timer); | |
1697 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
1698 | add_timer(&ifmgd->chswitch_timer); | |
1699 | } | |
1700 | #endif | |
1701 | ||
9c6bd790 JB |
1702 | /* interface setup */ |
1703 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1704 | { |
46900298 | 1705 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1706 | |
46900298 JB |
1707 | ifmgd = &sdata->u.mgd; |
1708 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
b291ba11 | 1709 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 1710 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
04de8381 | 1711 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 1712 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 1713 | (unsigned long) sdata); |
b291ba11 JB |
1714 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1715 | (unsigned long) sdata); | |
1716 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
1717 | (unsigned long) sdata); | |
46900298 | 1718 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1719 | (unsigned long) sdata); |
46900298 | 1720 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1721 | |
ab1faead | 1722 | ifmgd->flags = 0; |
bbbdff9e | 1723 | |
77fdaa12 | 1724 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
1725 | |
1726 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
1727 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
1728 | else | |
1729 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
1730 | } |
1731 | ||
77fdaa12 JB |
1732 | /* scan finished notification */ |
1733 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 1734 | { |
77fdaa12 | 1735 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 1736 | |
77fdaa12 JB |
1737 | /* Restart STA timers */ |
1738 | rcu_read_lock(); | |
1739 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1740 | ieee80211_restart_sta_timer(sdata); | |
1741 | rcu_read_unlock(); | |
1742 | } | |
60f8b39c | 1743 | |
77fdaa12 JB |
1744 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1745 | unsigned long data, void *dummy) | |
1746 | { | |
1747 | s32 latency_usec = (s32) data; | |
1748 | struct ieee80211_local *local = | |
1749 | container_of(nb, struct ieee80211_local, | |
1750 | network_latency_notifier); | |
1fa6f4af | 1751 | |
77fdaa12 JB |
1752 | mutex_lock(&local->iflist_mtx); |
1753 | ieee80211_recalc_ps(local, latency_usec); | |
1754 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 1755 | |
77fdaa12 | 1756 | return 0; |
9c6bd790 JB |
1757 | } |
1758 | ||
77fdaa12 | 1759 | /* config hooks */ |
af6b6374 JB |
1760 | static enum work_done_result |
1761 | ieee80211_probe_auth_done(struct ieee80211_work *wk, | |
1762 | struct sk_buff *skb) | |
1763 | { | |
1764 | if (!skb) { | |
1765 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); | |
1766 | return WORK_DONE_DESTROY; | |
1767 | } | |
1768 | ||
1769 | if (wk->type == IEEE80211_WORK_AUTH) { | |
1770 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); | |
1771 | return WORK_DONE_DESTROY; | |
1772 | } | |
1773 | ||
1774 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1775 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); | |
1776 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1777 | ||
1778 | wk->type = IEEE80211_WORK_AUTH; | |
1779 | wk->probe_auth.tries = 0; | |
1780 | return WORK_DONE_REQUEUE; | |
1781 | } | |
1782 | ||
77fdaa12 JB |
1783 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
1784 | struct cfg80211_auth_request *req) | |
9c6bd790 | 1785 | { |
77fdaa12 | 1786 | const u8 *ssid; |
f679f65d | 1787 | struct ieee80211_work *wk; |
77fdaa12 | 1788 | u16 auth_alg; |
9c6bd790 | 1789 | |
77fdaa12 JB |
1790 | switch (req->auth_type) { |
1791 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
1792 | auth_alg = WLAN_AUTH_OPEN; | |
1793 | break; | |
1794 | case NL80211_AUTHTYPE_SHARED_KEY: | |
1795 | auth_alg = WLAN_AUTH_SHARED_KEY; | |
1796 | break; | |
1797 | case NL80211_AUTHTYPE_FT: | |
1798 | auth_alg = WLAN_AUTH_FT; | |
1799 | break; | |
1800 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
1801 | auth_alg = WLAN_AUTH_LEAP; | |
1802 | break; | |
1803 | default: | |
1804 | return -EOPNOTSUPP; | |
60f8b39c | 1805 | } |
77fdaa12 JB |
1806 | |
1807 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); | |
1808 | if (!wk) | |
9c6bd790 | 1809 | return -ENOMEM; |
77fdaa12 | 1810 | |
5e124bd5 | 1811 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
77fdaa12 JB |
1812 | |
1813 | if (req->ie && req->ie_len) { | |
1814 | memcpy(wk->ie, req->ie, req->ie_len); | |
1815 | wk->ie_len = req->ie_len; | |
9c6bd790 | 1816 | } |
77fdaa12 | 1817 | |
fffd0934 | 1818 | if (req->key && req->key_len) { |
af6b6374 JB |
1819 | wk->probe_auth.key_len = req->key_len; |
1820 | wk->probe_auth.key_idx = req->key_idx; | |
1821 | memcpy(wk->probe_auth.key, req->key, req->key_len); | |
fffd0934 JB |
1822 | } |
1823 | ||
77fdaa12 | 1824 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
af6b6374 JB |
1825 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
1826 | wk->probe_auth.ssid_len = ssid[1]; | |
f679f65d | 1827 | |
af6b6374 JB |
1828 | wk->probe_auth.algorithm = auth_alg; |
1829 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; | |
77fdaa12 | 1830 | |
070bb547 JB |
1831 | /* if we already have a probe, don't probe again */ |
1832 | if (req->bss->proberesp_ies) | |
1833 | wk->type = IEEE80211_WORK_AUTH; | |
1834 | else | |
1835 | wk->type = IEEE80211_WORK_DIRECT_PROBE; | |
f679f65d | 1836 | wk->chan = req->bss->channel; |
af6b6374 JB |
1837 | wk->sdata = sdata; |
1838 | wk->done = ieee80211_probe_auth_done; | |
77fdaa12 | 1839 | |
af6b6374 | 1840 | ieee80211_add_work(wk); |
9c6bd790 | 1841 | return 0; |
60f8b39c JB |
1842 | } |
1843 | ||
af6b6374 JB |
1844 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
1845 | struct sk_buff *skb) | |
1846 | { | |
1847 | struct ieee80211_mgmt *mgmt; | |
1848 | u16 status; | |
1849 | ||
1850 | if (!skb) { | |
1851 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); | |
1852 | return WORK_DONE_DESTROY; | |
1853 | } | |
1854 | ||
1855 | mgmt = (void *)skb->data; | |
1856 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1857 | ||
1858 | if (status == WLAN_STATUS_SUCCESS) { | |
1859 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1860 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { | |
1861 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1862 | /* oops -- internal error -- send timeout for now */ | |
1863 | cfg80211_send_assoc_timeout(wk->sdata->dev, | |
1864 | wk->filter_ta); | |
1865 | return WORK_DONE_DESTROY; | |
1866 | } | |
1867 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1868 | } | |
1869 | ||
1870 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); | |
1871 | return WORK_DONE_DESTROY; | |
1872 | } | |
1873 | ||
77fdaa12 JB |
1874 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
1875 | struct cfg80211_assoc_request *req) | |
f0706e82 | 1876 | { |
77fdaa12 | 1877 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 1878 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
f679f65d | 1879 | struct ieee80211_work *wk; |
63f170e0 | 1880 | const u8 *ssid; |
af6b6374 | 1881 | int i; |
f0706e82 | 1882 | |
77fdaa12 | 1883 | mutex_lock(&ifmgd->mtx); |
af6b6374 JB |
1884 | if (ifmgd->associated) { |
1885 | mutex_unlock(&ifmgd->mtx); | |
1886 | return -EALREADY; | |
1887 | } | |
1888 | mutex_unlock(&ifmgd->mtx); | |
77fdaa12 | 1889 | |
63f170e0 | 1890 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
af6b6374 JB |
1891 | if (!wk) |
1892 | return -ENOMEM; | |
77fdaa12 | 1893 | |
77fdaa12 JB |
1894 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
1895 | ||
1896 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) | |
1897 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
1898 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
1899 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
1900 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
1901 | ||
77fdaa12 JB |
1902 | |
1903 | if (req->ie && req->ie_len) { | |
1904 | memcpy(wk->ie, req->ie, req->ie_len); | |
1905 | wk->ie_len = req->ie_len; | |
1906 | } else | |
1907 | wk->ie_len = 0; | |
1908 | ||
0c1ad2ca | 1909 | wk->assoc.bss = req->bss; |
f679f65d | 1910 | |
af6b6374 | 1911 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
f679f65d | 1912 | |
af6b6374 JB |
1913 | /* new association always uses requested smps mode */ |
1914 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { | |
1915 | if (ifmgd->powersave) | |
1916 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
1917 | else | |
1918 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
1919 | } else | |
1920 | ifmgd->ap_smps = ifmgd->req_smps; | |
1921 | ||
1922 | wk->assoc.smps = ifmgd->ap_smps; | |
77c8144a JB |
1923 | /* |
1924 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
1925 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
1926 | * ciphers is configured as pairwise. | |
1927 | * We can set this to true for non-11n hardware, that'll be checked | |
1928 | * separately along with the peer capabilities. | |
1929 | */ | |
af6b6374 | 1930 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
f679f65d | 1931 | wk->assoc.capability = req->bss->capability; |
0c1ad2ca JB |
1932 | wk->assoc.wmm_used = bss->wmm_used; |
1933 | wk->assoc.supp_rates = bss->supp_rates; | |
1934 | wk->assoc.supp_rates_len = bss->supp_rates_len; | |
f679f65d JB |
1935 | wk->assoc.ht_information_ie = |
1936 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); | |
63f170e0 | 1937 | |
ab13315a KV |
1938 | if (bss->wmm_used && bss->uapsd_supported && |
1939 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
1940 | wk->assoc.uapsd_used = true; | |
1941 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; | |
1942 | } else { | |
1943 | wk->assoc.uapsd_used = false; | |
1944 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; | |
1945 | } | |
1946 | ||
63f170e0 | 1947 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
f679f65d JB |
1948 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
1949 | wk->assoc.ssid_len = ssid[1]; | |
63f170e0 | 1950 | |
77fdaa12 | 1951 | if (req->prev_bssid) |
f679f65d | 1952 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 | 1953 | |
f679f65d | 1954 | wk->type = IEEE80211_WORK_ASSOC; |
f679f65d | 1955 | wk->chan = req->bss->channel; |
af6b6374 JB |
1956 | wk->sdata = sdata; |
1957 | wk->done = ieee80211_assoc_done; | |
77fdaa12 JB |
1958 | |
1959 | if (req->use_mfp) { | |
1960 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
1961 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
1962 | } else { | |
1963 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
1964 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
1965 | } | |
1966 | ||
1967 | if (req->crypto.control_port) | |
1968 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
1969 | else | |
1970 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
1971 | ||
af6b6374 JB |
1972 | ieee80211_add_work(wk); |
1973 | return 0; | |
f0706e82 JB |
1974 | } |
1975 | ||
77fdaa12 | 1976 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
1977 | struct cfg80211_deauth_request *req, |
1978 | void *cookie) | |
f0706e82 | 1979 | { |
af6b6374 | 1980 | struct ieee80211_local *local = sdata->local; |
46900298 | 1981 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f679f65d | 1982 | struct ieee80211_work *wk; |
63f170e0 | 1983 | const u8 *bssid = req->bss->bssid; |
f0706e82 | 1984 | |
77fdaa12 JB |
1985 | mutex_lock(&ifmgd->mtx); |
1986 | ||
0c1ad2ca | 1987 | if (ifmgd->associated == req->bss) { |
77fdaa12 | 1988 | bssid = req->bss->bssid; |
63f170e0 | 1989 | ieee80211_set_disassoc(sdata); |
af6b6374 JB |
1990 | mutex_unlock(&ifmgd->mtx); |
1991 | } else { | |
1992 | bool not_auth_yet = false; | |
f0706e82 | 1993 | |
a58ce43f | 1994 | mutex_unlock(&ifmgd->mtx); |
a58ce43f | 1995 | |
af6b6374 JB |
1996 | mutex_lock(&local->work_mtx); |
1997 | list_for_each_entry(wk, &local->work_list, list) { | |
29165e4c | 1998 | if (wk->sdata != sdata) |
af6b6374 | 1999 | continue; |
29165e4c JB |
2000 | |
2001 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE && | |
2002 | wk->type != IEEE80211_WORK_AUTH) | |
2003 | continue; | |
2004 | ||
af6b6374 JB |
2005 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) |
2006 | continue; | |
29165e4c JB |
2007 | |
2008 | not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE; | |
2009 | list_del_rcu(&wk->list); | |
af6b6374 JB |
2010 | free_work(wk); |
2011 | break; | |
2012 | } | |
2013 | mutex_unlock(&local->work_mtx); | |
2014 | ||
2015 | /* | |
2016 | * If somebody requests authentication and we haven't | |
2017 | * sent out an auth frame yet there's no need to send | |
2018 | * out a deauth frame either. If the state was PROBE, | |
2019 | * then this is the case. If it's AUTH we have sent a | |
2020 | * frame, and if it's IDLE we have completed the auth | |
2021 | * process already. | |
2022 | */ | |
2023 | if (not_auth_yet) { | |
2024 | __cfg80211_auth_canceled(sdata->dev, bssid); | |
2025 | return 0; | |
2026 | } | |
2027 | } | |
77fdaa12 | 2028 | |
0ff71613 | 2029 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
47846c9b | 2030 | sdata->name, bssid, req->reason_code); |
0ff71613 | 2031 | |
77fdaa12 | 2032 | ieee80211_send_deauth_disassoc(sdata, bssid, |
667503dd JB |
2033 | IEEE80211_STYPE_DEAUTH, req->reason_code, |
2034 | cookie); | |
f0706e82 | 2035 | |
bc83b681 JB |
2036 | ieee80211_recalc_idle(sdata->local); |
2037 | ||
f0706e82 JB |
2038 | return 0; |
2039 | } | |
84363e6e | 2040 | |
77fdaa12 | 2041 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2042 | struct cfg80211_disassoc_request *req, |
2043 | void *cookie) | |
9c6bd790 | 2044 | { |
77fdaa12 | 2045 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2046 | |
77fdaa12 | 2047 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 2048 | |
8d8b261a JB |
2049 | /* |
2050 | * cfg80211 should catch this ... but it's racy since | |
2051 | * we can receive a disassoc frame, process it, hand it | |
2052 | * to cfg80211 while that's in a locked section already | |
2053 | * trying to tell us that the user wants to disconnect. | |
2054 | */ | |
0c1ad2ca | 2055 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
2056 | mutex_unlock(&ifmgd->mtx); |
2057 | return -ENOLINK; | |
2058 | } | |
2059 | ||
0ff71613 | 2060 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 2061 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 2062 | |
63f170e0 | 2063 | ieee80211_set_disassoc(sdata); |
77fdaa12 JB |
2064 | |
2065 | mutex_unlock(&ifmgd->mtx); | |
10f644a4 | 2066 | |
77fdaa12 | 2067 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
667503dd JB |
2068 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
2069 | cookie); | |
bc83b681 JB |
2070 | |
2071 | ieee80211_recalc_idle(sdata->local); | |
2072 | ||
10f644a4 JB |
2073 | return 0; |
2074 | } |