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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
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 JB |
29 | |
30 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
31 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
32 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
33 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
a43abf29 | 34 | #define IEEE80211_MAX_PROBE_TRIES 5 |
b291ba11 JB |
35 | |
36 | /* | |
37 | * beacon loss detection timeout | |
38 | * XXX: should depend on beacon interval | |
39 | */ | |
40 | #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) | |
41 | /* | |
42 | * Time the connection can be idle before we probe | |
43 | * it to see if we can still talk to the AP. | |
44 | */ | |
d1c5091f | 45 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
46 | /* |
47 | * Time we wait for a probe response after sending | |
48 | * a probe request because of beacon loss or for | |
49 | * checking the connection still works. | |
50 | */ | |
d1c5091f | 51 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
f0706e82 | 52 | |
5bb644a0 JB |
53 | #define TMR_RUNNING_TIMER 0 |
54 | #define TMR_RUNNING_CHANSW 1 | |
55 | ||
77fdaa12 JB |
56 | /* |
57 | * All cfg80211 functions have to be called outside a locked | |
58 | * section so that they can acquire a lock themselves... This | |
59 | * is much simpler than queuing up things in cfg80211, but we | |
60 | * do need some indirection for that here. | |
61 | */ | |
62 | enum rx_mgmt_action { | |
63 | /* no action required */ | |
64 | RX_MGMT_NONE, | |
65 | ||
66 | /* caller must call cfg80211_send_rx_auth() */ | |
67 | RX_MGMT_CFG80211_AUTH, | |
68 | ||
69 | /* caller must call cfg80211_send_rx_assoc() */ | |
70 | RX_MGMT_CFG80211_ASSOC, | |
71 | ||
72 | /* caller must call cfg80211_send_deauth() */ | |
73 | RX_MGMT_CFG80211_DEAUTH, | |
74 | ||
75 | /* caller must call cfg80211_send_disassoc() */ | |
76 | RX_MGMT_CFG80211_DISASSOC, | |
77 | ||
5d1ec85f JB |
78 | /* caller must tell cfg80211 about internal error */ |
79 | RX_MGMT_CFG80211_ASSOC_ERROR, | |
77fdaa12 JB |
80 | }; |
81 | ||
5484e237 | 82 | /* utils */ |
77fdaa12 JB |
83 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
84 | { | |
85 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); | |
86 | } | |
87 | ||
ca386f31 JB |
88 | /* |
89 | * We can have multiple work items (and connection probing) | |
90 | * scheduling this timer, but we need to take care to only | |
91 | * reschedule it when it should fire _earlier_ than it was | |
92 | * asked for before, or if it's not pending right now. This | |
93 | * function ensures that. Note that it then is required to | |
94 | * run this function for all timeouts after the first one | |
95 | * has happened -- the work that runs from this timer will | |
96 | * do that. | |
97 | */ | |
98 | static void run_again(struct ieee80211_if_managed *ifmgd, | |
99 | unsigned long timeout) | |
100 | { | |
101 | ASSERT_MGD_MTX(ifmgd); | |
102 | ||
103 | if (!timer_pending(&ifmgd->timer) || | |
104 | time_before(timeout, ifmgd->timer.expires)) | |
105 | mod_timer(&ifmgd->timer, timeout); | |
106 | } | |
107 | ||
b291ba11 JB |
108 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
109 | { | |
110 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) | |
111 | return; | |
112 | ||
113 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
114 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); | |
115 | } | |
116 | ||
5484e237 | 117 | static int ecw2cw(int ecw) |
60f8b39c | 118 | { |
5484e237 | 119 | return (1 << ecw) - 1; |
60f8b39c JB |
120 | } |
121 | ||
d5522e03 JB |
122 | /* |
123 | * ieee80211_enable_ht should be called only after the operating band | |
124 | * has been determined as ht configuration depends on the hw's | |
125 | * HT abilities for a specific band. | |
126 | */ | |
127 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
128 | struct ieee80211_ht_info *hti, | |
77fdaa12 | 129 | const u8 *bssid, u16 ap_ht_cap_flags) |
d5522e03 JB |
130 | { |
131 | struct ieee80211_local *local = sdata->local; | |
132 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
133 | struct sta_info *sta; |
134 | u32 changed = 0; | |
9ed6bcce | 135 | u16 ht_opmode; |
d5522e03 JB |
136 | bool enable_ht = true, ht_changed; |
137 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
138 | ||
139 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
140 | ||
d5522e03 JB |
141 | /* HT is not supported */ |
142 | if (!sband->ht_cap.ht_supported) | |
143 | enable_ht = false; | |
144 | ||
145 | /* check that channel matches the right operating channel */ | |
146 | if (local->hw.conf.channel->center_freq != | |
147 | ieee80211_channel_to_frequency(hti->control_chan)) | |
148 | enable_ht = false; | |
149 | ||
150 | if (enable_ht) { | |
151 | channel_type = NL80211_CHAN_HT20; | |
152 | ||
153 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
154 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
155 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
156 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
157 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
158 | if (!(local->hw.conf.channel->flags & |
159 | IEEE80211_CHAN_NO_HT40PLUS)) | |
160 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
161 | break; |
162 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
163 | if (!(local->hw.conf.channel->flags & |
164 | IEEE80211_CHAN_NO_HT40MINUS)) | |
165 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
166 | break; |
167 | } | |
168 | } | |
169 | } | |
170 | ||
171 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
172 | channel_type != local->hw.conf.channel_type; | |
173 | ||
174 | local->oper_channel_type = channel_type; | |
175 | ||
176 | if (ht_changed) { | |
177 | /* channel_type change automatically detected */ | |
178 | ieee80211_hw_config(local, 0); | |
179 | ||
180 | rcu_read_lock(); | |
abe60632 | 181 | sta = sta_info_get(sdata, bssid); |
d5522e03 JB |
182 | if (sta) |
183 | rate_control_rate_update(local, sband, sta, | |
184 | IEEE80211_RC_HT_CHANGED); | |
d5522e03 | 185 | rcu_read_unlock(); |
d5522e03 JB |
186 | } |
187 | ||
188 | /* disable HT */ | |
189 | if (!enable_ht) | |
190 | return 0; | |
191 | ||
9ed6bcce | 192 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
193 | |
194 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
195 | if (!sdata->ht_opmode_valid || |
196 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 197 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 198 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 199 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
200 | } |
201 | ||
202 | return changed; | |
203 | } | |
204 | ||
9c6bd790 JB |
205 | /* frame sending functions */ |
206 | ||
ef422bc0 | 207 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
208 | const u8 *bssid, u16 stype, u16 reason, |
209 | void *cookie) | |
9ac19a90 JB |
210 | { |
211 | struct ieee80211_local *local = sdata->local; | |
46900298 | 212 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
213 | struct sk_buff *skb; |
214 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 215 | |
65fc73ac | 216 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 217 | if (!skb) { |
ef422bc0 | 218 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
47846c9b | 219 | "deauth/disassoc frame\n", sdata->name); |
9ac19a90 JB |
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); | |
77fdaa12 | 226 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 227 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 228 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 229 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 230 | skb_put(skb, 2); |
ef422bc0 | 231 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
232 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
233 | ||
53b46b84 | 234 | if (stype == IEEE80211_STYPE_DEAUTH) |
ce470613 HS |
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); | |
53b46b84 | 239 | else |
ce470613 HS |
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); | |
62ae67be JB |
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); | |
9ac19a90 JB |
247 | } |
248 | ||
572e0012 KV |
249 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
250 | struct ieee80211_sub_if_data *sdata) | |
251 | { | |
572e0012 KV |
252 | struct ieee80211_pspoll *pspoll; |
253 | struct sk_buff *skb; | |
572e0012 | 254 | |
d8cd189e KV |
255 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
256 | if (!skb) | |
572e0012 | 257 | return; |
572e0012 | 258 | |
d8cd189e KV |
259 | pspoll = (struct ieee80211_pspoll *) skb->data; |
260 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 261 | |
62ae67be JB |
262 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
263 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
264 | } |
265 | ||
965bedad JB |
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; | |
d8cd189e | 271 | struct ieee80211_hdr_3addr *nullfunc; |
965bedad | 272 | |
d8cd189e KV |
273 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
274 | if (!skb) | |
965bedad | 275 | return; |
965bedad | 276 | |
d8cd189e | 277 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 278 | if (powersave) |
d8cd189e | 279 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 280 | |
62ae67be JB |
281 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
282 | ieee80211_tx_skb(sdata, skb); | |
965bedad JB |
283 | } |
284 | ||
d524215f FF |
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 | ||
cc32abd4 JB |
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); | |
cc32abd4 JB |
322 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
323 | ||
9607e6b6 | 324 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
325 | return; |
326 | ||
77fdaa12 JB |
327 | mutex_lock(&ifmgd->mtx); |
328 | if (!ifmgd->associated) | |
329 | goto out; | |
cc32abd4 JB |
330 | |
331 | sdata->local->oper_channel = sdata->local->csa_channel; | |
77fdaa12 JB |
332 | ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
333 | ||
cc32abd4 | 334 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 335 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 336 | |
cc32abd4 JB |
337 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
338 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
339 | out: |
340 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
341 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
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 | ||
5bb644a0 JB |
350 | if (sdata->local->quiescing) { |
351 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
352 | return; | |
353 | } | |
354 | ||
42935eca | 355 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
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 | { | |
0c1ad2ca JB |
362 | struct cfg80211_bss *cbss = |
363 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
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 | ||
77fdaa12 JB |
368 | ASSERT_MGD_MTX(ifmgd); |
369 | ||
370 | if (!ifmgd->associated) | |
cc32abd4 JB |
371 | return; |
372 | ||
fbe9c429 | 373 | if (sdata->local->scanning) |
cc32abd4 JB |
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) { | |
42935eca | 389 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
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 * | |
0c1ad2ca | 397 | cbss->beacon_interval)); |
cc32abd4 JB |
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 | ||
965bedad JB |
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 | ||
d5edaedc JB |
427 | /* |
428 | * If we are scanning right now then the parameters will | |
429 | * take effect when scan finishes. | |
430 | */ | |
fbe9c429 | 431 | if (local->scanning) |
d5edaedc JB |
432 | return; |
433 | ||
965bedad JB |
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 | conf->flags |= IEEE80211_CONF_PS; | |
442 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
443 | } | |
444 | } | |
445 | ||
446 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
447 | { | |
448 | struct ieee80211_conf *conf = &local->hw.conf; | |
449 | ||
450 | if (local->ps_sdata) { | |
965bedad JB |
451 | ieee80211_enable_ps(local, local->ps_sdata); |
452 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
453 | conf->flags &= ~IEEE80211_CONF_PS; | |
454 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
455 | del_timer_sync(&local->dynamic_ps_timer); | |
456 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
457 | } | |
458 | } | |
459 | ||
460 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 461 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
462 | { |
463 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
464 | int count = 0; | |
465 | ||
466 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
467 | local->ps_sdata = NULL; | |
468 | return; | |
469 | } | |
470 | ||
af6b6374 JB |
471 | if (!list_empty(&local->work_list)) { |
472 | local->ps_sdata = NULL; | |
473 | goto change; | |
474 | } | |
475 | ||
965bedad | 476 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 477 | if (!ieee80211_sdata_running(sdata)) |
965bedad JB |
478 | continue; |
479 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
480 | continue; | |
481 | found = sdata; | |
482 | count++; | |
483 | } | |
484 | ||
43f78531 | 485 | if (count == 1 && found->u.mgd.powersave && |
af6b6374 | 486 | found->u.mgd.associated && |
b291ba11 JB |
487 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
488 | IEEE80211_STA_CONNECTION_POLL))) { | |
10f644a4 JB |
489 | s32 beaconint_us; |
490 | ||
491 | if (latency < 0) | |
492 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
493 | ||
494 | beaconint_us = ieee80211_tu_to_usec( | |
495 | found->vif.bss_conf.beacon_int); | |
496 | ||
04fe2037 | 497 | if (beaconint_us > latency) { |
10f644a4 | 498 | local->ps_sdata = NULL; |
04fe2037 JB |
499 | } else { |
500 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
501 | int maxslp = 1; | |
502 | ||
503 | if (dtimper > 1) | |
504 | maxslp = min_t(int, dtimper, | |
505 | latency / beaconint_us); | |
506 | ||
9ccebe61 | 507 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 508 | local->ps_sdata = found; |
04fe2037 | 509 | } |
10f644a4 | 510 | } else { |
965bedad | 511 | local->ps_sdata = NULL; |
10f644a4 | 512 | } |
965bedad | 513 | |
af6b6374 | 514 | change: |
965bedad JB |
515 | ieee80211_change_ps(local); |
516 | } | |
517 | ||
518 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
519 | { | |
520 | struct ieee80211_local *local = | |
521 | container_of(work, struct ieee80211_local, | |
522 | dynamic_ps_disable_work); | |
523 | ||
524 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
525 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
526 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
527 | } | |
528 | ||
529 | ieee80211_wake_queues_by_reason(&local->hw, | |
530 | IEEE80211_QUEUE_STOP_REASON_PS); | |
531 | } | |
532 | ||
533 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
534 | { | |
535 | struct ieee80211_local *local = | |
536 | container_of(work, struct ieee80211_local, | |
537 | dynamic_ps_enable_work); | |
538 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
539 | ||
540 | /* can only happen when PS was just disabled anyway */ | |
541 | if (!sdata) | |
542 | return; | |
543 | ||
544 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
545 | return; | |
546 | ||
547 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
548 | ieee80211_send_nullfunc(local, sdata, 1); | |
549 | ||
550 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
551 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
552 | } | |
553 | ||
554 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
555 | { | |
556 | struct ieee80211_local *local = (void *) data; | |
557 | ||
78f1a8b7 | 558 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
559 | return; |
560 | ||
42935eca | 561 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
562 | } |
563 | ||
60f8b39c | 564 | /* MLME */ |
f698d856 | 565 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 566 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
567 | u8 *wmm_param, size_t wmm_param_len) |
568 | { | |
f0706e82 JB |
569 | struct ieee80211_tx_queue_params params; |
570 | size_t left; | |
571 | int count; | |
ab13315a | 572 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 573 | |
af6b6374 | 574 | if (local->hw.queues < 4) |
3434fbd3 JB |
575 | return; |
576 | ||
577 | if (!wmm_param) | |
578 | return; | |
579 | ||
f0706e82 JB |
580 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
581 | return; | |
ab13315a KV |
582 | |
583 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
584 | uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; | |
585 | ||
f0706e82 | 586 | count = wmm_param[6] & 0x0f; |
46900298 | 587 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 588 | return; |
46900298 | 589 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
590 | |
591 | pos = wmm_param + 8; | |
592 | left = wmm_param_len - 8; | |
593 | ||
594 | memset(¶ms, 0, sizeof(params)); | |
595 | ||
f0706e82 JB |
596 | local->wmm_acm = 0; |
597 | for (; left >= 4; left -= 4, pos += 4) { | |
598 | int aci = (pos[0] >> 5) & 0x03; | |
599 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 600 | bool uapsd = false; |
f0706e82 JB |
601 | int queue; |
602 | ||
603 | switch (aci) { | |
0eeb59fe | 604 | case 1: /* AC_BK */ |
e100bb64 | 605 | queue = 3; |
988c0f72 | 606 | if (acm) |
0eeb59fe | 607 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
608 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
609 | uapsd = true; | |
f0706e82 | 610 | break; |
0eeb59fe | 611 | case 2: /* AC_VI */ |
e100bb64 | 612 | queue = 1; |
988c0f72 | 613 | if (acm) |
0eeb59fe | 614 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
615 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
616 | uapsd = true; | |
f0706e82 | 617 | break; |
0eeb59fe | 618 | case 3: /* AC_VO */ |
e100bb64 | 619 | queue = 0; |
988c0f72 | 620 | if (acm) |
0eeb59fe | 621 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
622 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
623 | uapsd = true; | |
f0706e82 | 624 | break; |
0eeb59fe | 625 | case 0: /* AC_BE */ |
f0706e82 | 626 | default: |
e100bb64 | 627 | queue = 2; |
988c0f72 | 628 | if (acm) |
0eeb59fe | 629 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
630 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
631 | uapsd = true; | |
f0706e82 JB |
632 | break; |
633 | } | |
634 | ||
635 | params.aifs = pos[0] & 0x0f; | |
636 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
637 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 638 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
639 | params.uapsd = uapsd; |
640 | ||
f4ea83dd | 641 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 642 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
ab13315a | 643 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
0bffe40f | 644 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
ab13315a KV |
645 | params.aifs, params.cw_min, params.cw_max, params.txop, |
646 | params.uapsd); | |
3330d7be | 647 | #endif |
24487981 | 648 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 649 | printk(KERN_DEBUG "%s: failed to set TX queue " |
0bffe40f JB |
650 | "parameters for queue %d\n", |
651 | wiphy_name(local->hw.wiphy), queue); | |
f0706e82 JB |
652 | } |
653 | } | |
654 | ||
7a5158ef JB |
655 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
656 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 657 | { |
bda3933a | 658 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 659 | u32 changed = 0; |
7a5158ef JB |
660 | bool use_protection; |
661 | bool use_short_preamble; | |
662 | bool use_short_slot; | |
663 | ||
664 | if (erp_valid) { | |
665 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
666 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
667 | } else { | |
668 | use_protection = false; | |
669 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
670 | } | |
671 | ||
672 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 673 | |
471b3efd | 674 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
675 | bss_conf->use_cts_prot = use_protection; |
676 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 677 | } |
7e9ed188 | 678 | |
d43c7b37 | 679 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 680 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 681 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 682 | } |
d9430a32 | 683 | |
7a5158ef | 684 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
685 | bss_conf->use_short_slot = use_short_slot; |
686 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
687 | } |
688 | ||
689 | return changed; | |
690 | } | |
691 | ||
f698d856 | 692 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 693 | struct cfg80211_bss *cbss, |
ae5eb026 | 694 | u32 bss_info_changed) |
f0706e82 | 695 | { |
0c1ad2ca | 696 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 697 | struct ieee80211_local *local = sdata->local; |
d6f2da5b | 698 | |
ae5eb026 | 699 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 700 | /* set timing information */ |
0c1ad2ca JB |
701 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
702 | sdata->vif.bss_conf.timestamp = cbss->tsf; | |
77fdaa12 | 703 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
5628221c | 704 | |
77fdaa12 JB |
705 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
706 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 707 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 708 | |
0c1ad2ca JB |
709 | sdata->u.mgd.associated = cbss; |
710 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 711 | |
b291ba11 JB |
712 | /* just to be sure */ |
713 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
714 | IEEE80211_STA_BEACON_POLL); | |
715 | ||
0183826b JB |
716 | /* |
717 | * Always handle WMM once after association regardless | |
718 | * of the first value the AP uses. Setting -1 here has | |
719 | * that effect because the AP values is an unsigned | |
720 | * 4-bit value. | |
721 | */ | |
722 | sdata->u.mgd.wmm_last_param_set = -1; | |
723 | ||
9ac19a90 | 724 | ieee80211_led_assoc(local, 1); |
9306102e | 725 | |
bda3933a | 726 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
727 | /* |
728 | * For now just always ask the driver to update the basic rateset | |
729 | * when we have associated, we aren't checking whether it actually | |
730 | * changed or not. | |
731 | */ | |
ae5eb026 | 732 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
733 | |
734 | /* And the BSSID changed - we're associated now */ | |
735 | bss_info_changed |= BSS_CHANGED_BSSID; | |
736 | ||
ae5eb026 | 737 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 738 | |
056508dc JB |
739 | mutex_lock(&local->iflist_mtx); |
740 | ieee80211_recalc_ps(local, -1); | |
0f78231b | 741 | ieee80211_recalc_smps(local, sdata); |
056508dc | 742 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 743 | |
8a5b33f5 | 744 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 745 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
746 | } |
747 | ||
63f170e0 | 748 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) |
aa458d17 | 749 | { |
46900298 | 750 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
751 | struct ieee80211_local *local = sdata->local; |
752 | struct sta_info *sta; | |
e0cb686f | 753 | u32 changed = 0, config_changed = 0; |
b291ba11 | 754 | u8 bssid[ETH_ALEN]; |
aa458d17 | 755 | |
77fdaa12 JB |
756 | ASSERT_MGD_MTX(ifmgd); |
757 | ||
b291ba11 JB |
758 | if (WARN_ON(!ifmgd->associated)) |
759 | return; | |
760 | ||
0c1ad2ca | 761 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 762 | |
77fdaa12 JB |
763 | ifmgd->associated = NULL; |
764 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
765 | ||
766 | /* | |
767 | * we need to commit the associated = NULL change because the | |
768 | * scan code uses that to determine whether this iface should | |
769 | * go to/wake up from powersave or not -- and could otherwise | |
770 | * wake the queues erroneously. | |
771 | */ | |
772 | smp_mb(); | |
773 | ||
774 | /* | |
775 | * Thus, we can only afterwards stop the queues -- to account | |
776 | * for the case where another CPU is finishing a scan at this | |
777 | * time -- we don't want the scan code to enable queues. | |
778 | */ | |
aa458d17 | 779 | |
8a5b33f5 | 780 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
781 | netif_carrier_off(sdata->dev); |
782 | ||
1fa6f4af | 783 | rcu_read_lock(); |
abe60632 | 784 | sta = sta_info_get(sdata, bssid); |
1fa6f4af JB |
785 | if (sta) |
786 | ieee80211_sta_tear_down_BA_sessions(sta); | |
787 | rcu_read_unlock(); | |
aa458d17 | 788 | |
f5e5bf25 TW |
789 | changed |= ieee80211_reset_erp_info(sdata); |
790 | ||
f5e5bf25 | 791 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
792 | changed |= BSS_CHANGED_ASSOC; |
793 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 794 | |
aa837e1d JB |
795 | ieee80211_set_wmm_default(sdata); |
796 | ||
4797938c | 797 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 798 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 799 | |
413ad50a JB |
800 | /* on the next assoc, re-program HT parameters */ |
801 | sdata->ht_opmode_valid = false; | |
802 | ||
a8302de9 VT |
803 | local->power_constr_level = 0; |
804 | ||
520eb820 KV |
805 | del_timer_sync(&local->dynamic_ps_timer); |
806 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
807 | ||
e0cb686f KV |
808 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
809 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
810 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
811 | } | |
ae5eb026 | 812 | |
e0cb686f | 813 | ieee80211_hw_config(local, config_changed); |
9cef8737 JB |
814 | |
815 | /* And the BSSID changed -- not very interesting here */ | |
816 | changed |= BSS_CHANGED_BSSID; | |
ae5eb026 | 817 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
818 | |
819 | rcu_read_lock(); | |
820 | ||
abe60632 | 821 | sta = sta_info_get(sdata, bssid); |
8e268e47 TW |
822 | if (!sta) { |
823 | rcu_read_unlock(); | |
824 | return; | |
825 | } | |
826 | ||
827 | sta_info_unlink(&sta); | |
828 | ||
829 | rcu_read_unlock(); | |
830 | ||
831 | sta_info_destroy(sta); | |
aa458d17 | 832 | } |
f0706e82 | 833 | |
3cf335d5 KV |
834 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
835 | struct ieee80211_hdr *hdr) | |
836 | { | |
837 | /* | |
838 | * We can postpone the mgd.timer whenever receiving unicast frames | |
839 | * from AP because we know that the connection is working both ways | |
840 | * at that time. But multicast frames (and hence also beacons) must | |
841 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
842 | * data idle periods for sending the periodic probe request to the |
843 | * AP we're connected to. | |
3cf335d5 | 844 | */ |
b291ba11 JB |
845 | if (is_multicast_ether_addr(hdr->addr1)) |
846 | return; | |
847 | ||
848 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
849 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
3cf335d5 | 850 | } |
f0706e82 | 851 | |
a43abf29 ML |
852 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
853 | { | |
854 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
855 | const u8 *ssid; | |
856 | ||
0c1ad2ca JB |
857 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
858 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, | |
a43abf29 ML |
859 | ssid + 2, ssid[1], NULL, 0); |
860 | ||
861 | ifmgd->probe_send_count++; | |
862 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; | |
863 | run_again(ifmgd, ifmgd->probe_timeout); | |
864 | } | |
865 | ||
b291ba11 JB |
866 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
867 | bool beacon) | |
04de8381 | 868 | { |
04de8381 | 869 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 870 | bool already = false; |
34bfc411 | 871 | |
9607e6b6 | 872 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
873 | return; |
874 | ||
91a3bd76 LR |
875 | if (sdata->local->scanning) |
876 | return; | |
877 | ||
b8bc4b0a JB |
878 | if (sdata->local->tmp_channel) |
879 | return; | |
880 | ||
77fdaa12 JB |
881 | mutex_lock(&ifmgd->mtx); |
882 | ||
883 | if (!ifmgd->associated) | |
884 | goto out; | |
885 | ||
a860402d | 886 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b291ba11 JB |
887 | if (beacon && net_ratelimit()) |
888 | printk(KERN_DEBUG "%s: detected beacon loss from AP " | |
47846c9b | 889 | "- sending probe request\n", sdata->name); |
a860402d | 890 | #endif |
04de8381 | 891 | |
b291ba11 JB |
892 | /* |
893 | * The driver/our work has already reported this event or the | |
894 | * connection monitoring has kicked in and we have already sent | |
895 | * a probe request. Or maybe the AP died and the driver keeps | |
896 | * reporting until we disassociate... | |
897 | * | |
898 | * In either case we have to ignore the current call to this | |
899 | * function (except for setting the correct probe reason bit) | |
900 | * because otherwise we would reset the timer every time and | |
901 | * never check whether we received a probe response! | |
902 | */ | |
903 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
904 | IEEE80211_STA_CONNECTION_POLL)) | |
905 | already = true; | |
906 | ||
907 | if (beacon) | |
908 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
909 | else | |
910 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
911 | ||
912 | if (already) | |
913 | goto out; | |
914 | ||
4e751843 JB |
915 | mutex_lock(&sdata->local->iflist_mtx); |
916 | ieee80211_recalc_ps(sdata->local, -1); | |
917 | mutex_unlock(&sdata->local->iflist_mtx); | |
918 | ||
a43abf29 ML |
919 | ifmgd->probe_send_count = 0; |
920 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
921 | out: |
922 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
923 | } |
924 | ||
b291ba11 JB |
925 | void ieee80211_beacon_loss_work(struct work_struct *work) |
926 | { | |
927 | struct ieee80211_sub_if_data *sdata = | |
928 | container_of(work, struct ieee80211_sub_if_data, | |
929 | u.mgd.beacon_loss_work); | |
930 | ||
931 | ieee80211_mgd_probe_ap(sdata, true); | |
932 | } | |
933 | ||
04de8381 KV |
934 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
935 | { | |
936 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
937 | ||
42935eca | 938 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
04de8381 KV |
939 | } |
940 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
941 | ||
77fdaa12 JB |
942 | static enum rx_mgmt_action __must_check |
943 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 944 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 945 | { |
46900298 | 946 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 947 | const u8 *bssid = NULL; |
f0706e82 JB |
948 | u16 reason_code; |
949 | ||
f4ea83dd | 950 | if (len < 24 + 2) |
77fdaa12 | 951 | return RX_MGMT_NONE; |
f0706e82 | 952 | |
77fdaa12 JB |
953 | ASSERT_MGD_MTX(ifmgd); |
954 | ||
0c1ad2ca | 955 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
956 | |
957 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
958 | ||
77fdaa12 | 959 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 960 | sdata->name, bssid, reason_code); |
77fdaa12 | 961 | |
63f170e0 JB |
962 | ieee80211_set_disassoc(sdata); |
963 | ieee80211_recalc_idle(sdata->local); | |
f0706e82 | 964 | |
77fdaa12 | 965 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
966 | } |
967 | ||
968 | ||
77fdaa12 JB |
969 | static enum rx_mgmt_action __must_check |
970 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
971 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 972 | { |
46900298 | 973 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
974 | u16 reason_code; |
975 | ||
f4ea83dd | 976 | if (len < 24 + 2) |
77fdaa12 | 977 | return RX_MGMT_NONE; |
f0706e82 | 978 | |
77fdaa12 JB |
979 | ASSERT_MGD_MTX(ifmgd); |
980 | ||
981 | if (WARN_ON(!ifmgd->associated)) | |
982 | return RX_MGMT_NONE; | |
983 | ||
0c1ad2ca | 984 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
77fdaa12 | 985 | return RX_MGMT_NONE; |
f0706e82 JB |
986 | |
987 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
988 | ||
0ff71613 | 989 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 990 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 991 | |
63f170e0 | 992 | ieee80211_set_disassoc(sdata); |
bc83b681 | 993 | ieee80211_recalc_idle(sdata->local); |
77fdaa12 | 994 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
995 | } |
996 | ||
997 | ||
af6b6374 JB |
998 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
999 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1000 | { |
af6b6374 | 1001 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
46900298 | 1002 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1003 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1004 | struct ieee80211_supported_band *sband; |
f0706e82 | 1005 | struct sta_info *sta; |
0c1ad2ca | 1006 | struct cfg80211_bss *cbss = wk->assoc.bss; |
af6b6374 | 1007 | u8 *pos; |
881d948c | 1008 | u32 rates, basic_rates; |
af6b6374 | 1009 | u16 capab_info, aid; |
f0706e82 | 1010 | struct ieee802_11_elems elems; |
bda3933a | 1011 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1012 | u32 changed = 0; |
5d1ec85f JB |
1013 | int i, j, err; |
1014 | bool have_higher_than_11mbit = false; | |
ae5eb026 | 1015 | u16 ap_ht_cap_flags; |
f0706e82 | 1016 | |
af6b6374 | 1017 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1018 | |
f0706e82 | 1019 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1020 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1021 | |
1dd84aa2 JB |
1022 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1023 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
47846c9b | 1024 | "set\n", sdata->name, aid); |
1dd84aa2 JB |
1025 | aid &= ~(BIT(15) | BIT(14)); |
1026 | ||
af6b6374 JB |
1027 | pos = mgmt->u.assoc_resp.variable; |
1028 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1029 | ||
f0706e82 JB |
1030 | if (!elems.supp_rates) { |
1031 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 1032 | sdata->name); |
af6b6374 | 1033 | return false; |
f0706e82 JB |
1034 | } |
1035 | ||
46900298 | 1036 | ifmgd->aid = aid; |
f0706e82 | 1037 | |
0c1ad2ca | 1038 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
f0706e82 | 1039 | if (!sta) { |
5d1ec85f JB |
1040 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1041 | " the AP\n", sdata->name); | |
af6b6374 | 1042 | return false; |
77fdaa12 | 1043 | } |
05e5e883 | 1044 | |
5d1ec85f JB |
1045 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1046 | WLAN_STA_ASSOC_AP); | |
1047 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1048 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
1049 | ||
60f8b39c JB |
1050 | rates = 0; |
1051 | basic_rates = 0; | |
1052 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1053 | |
60f8b39c JB |
1054 | for (i = 0; i < elems.supp_rates_len; i++) { |
1055 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1056 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1057 | |
60f8b39c JB |
1058 | if (rate > 110) |
1059 | have_higher_than_11mbit = true; | |
1060 | ||
1061 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1062 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1063 | rates |= BIT(j); |
d61272cb TW |
1064 | if (is_basic) |
1065 | basic_rates |= BIT(j); | |
1066 | break; | |
1067 | } | |
f709fc69 | 1068 | } |
f709fc69 LCC |
1069 | } |
1070 | ||
60f8b39c JB |
1071 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1072 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1073 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1074 | |
60f8b39c JB |
1075 | if (rate > 110) |
1076 | have_higher_than_11mbit = true; | |
f0706e82 | 1077 | |
60f8b39c | 1078 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1079 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1080 | rates |= BIT(j); |
d61272cb TW |
1081 | if (is_basic) |
1082 | basic_rates |= BIT(j); | |
1083 | break; | |
1084 | } | |
60f8b39c | 1085 | } |
1ebebea8 | 1086 | } |
f0706e82 | 1087 | |
323ce79a | 1088 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1089 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1090 | |
1091 | /* cf. IEEE 802.11 9.2.12 */ | |
1092 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1093 | have_higher_than_11mbit) | |
1094 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1095 | else | |
1096 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1097 | |
ab1faead | 1098 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1099 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1100 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1101 | |
1102 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1103 | |
4b7679a5 | 1104 | rate_control_rate_init(sta); |
f0706e82 | 1105 | |
46900298 | 1106 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1107 | set_sta_flags(sta, WLAN_STA_MFP); |
1108 | ||
ddf4ac53 | 1109 | if (elems.wmm_param) |
60f8b39c | 1110 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 | 1111 | |
5d1ec85f JB |
1112 | err = sta_info_insert(sta); |
1113 | sta = NULL; | |
1114 | if (err) { | |
1115 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1116 | " the AP (error %d)\n", sdata->name, err); | |
90be561b | 1117 | return false; |
ddf4ac53 JB |
1118 | } |
1119 | ||
ddf4ac53 | 1120 | if (elems.wmm_param) |
46900298 | 1121 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1122 | elems.wmm_param_len); |
aa837e1d JB |
1123 | else |
1124 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1125 | |
e4da8c37 JB |
1126 | local->oper_channel = wk->chan; |
1127 | ||
ae5eb026 | 1128 | if (elems.ht_info_elem && elems.wmm_param && |
af6b6374 | 1129 | (sdata->local->hw.queues >= 4) && |
ab1faead | 1130 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1131 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
0c1ad2ca | 1132 | cbss->bssid, ap_ht_cap_flags); |
ae5eb026 | 1133 | |
60f8b39c JB |
1134 | /* set AID and assoc capability, |
1135 | * ieee80211_set_associated() will tell the driver */ | |
1136 | bss_conf->aid = aid; | |
1137 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 1138 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 1139 | |
d524215f FF |
1140 | /* |
1141 | * If we're using 4-addr mode, let the AP know that we're | |
1142 | * doing so, so that it can create the STA VLAN on its side | |
1143 | */ | |
1144 | if (ifmgd->use_4addr) | |
1145 | ieee80211_send_4addr_nullfunc(local, sdata); | |
1146 | ||
15b7b062 | 1147 | /* |
b291ba11 JB |
1148 | * Start timer to probe the connection to the AP now. |
1149 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 1150 | */ |
b291ba11 JB |
1151 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1152 | mod_beacon_timer(sdata); | |
15b7b062 | 1153 | |
af6b6374 | 1154 | return true; |
f0706e82 JB |
1155 | } |
1156 | ||
1157 | ||
98c8fccf JB |
1158 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1159 | struct ieee80211_mgmt *mgmt, | |
1160 | size_t len, | |
1161 | struct ieee80211_rx_status *rx_status, | |
1162 | struct ieee802_11_elems *elems, | |
1163 | bool beacon) | |
1164 | { | |
1165 | struct ieee80211_local *local = sdata->local; | |
1166 | int freq; | |
c2b13452 | 1167 | struct ieee80211_bss *bss; |
98c8fccf | 1168 | struct ieee80211_channel *channel; |
98c8fccf JB |
1169 | |
1170 | if (elems->ds_params && elems->ds_params_len == 1) | |
1171 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1172 | else | |
1173 | freq = rx_status->freq; | |
1174 | ||
1175 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1176 | ||
1177 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1178 | return; | |
1179 | ||
98c8fccf | 1180 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1181 | channel, beacon); |
77fdaa12 JB |
1182 | if (bss) |
1183 | ieee80211_rx_bss_put(local, bss); | |
1184 | ||
1185 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
1186 | return; |
1187 | ||
c481ec97 | 1188 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 1189 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 1190 | ETH_ALEN) == 0)) { |
c481ec97 S |
1191 | struct ieee80211_channel_sw_ie *sw_elem = |
1192 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
cc32abd4 | 1193 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
c481ec97 | 1194 | } |
f0706e82 JB |
1195 | } |
1196 | ||
1197 | ||
f698d856 | 1198 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 1199 | struct sk_buff *skb) |
f0706e82 | 1200 | { |
af6b6374 | 1201 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 1202 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
1203 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1204 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
1205 | struct ieee802_11_elems elems; |
1206 | ||
15b7b062 KV |
1207 | ifmgd = &sdata->u.mgd; |
1208 | ||
77fdaa12 JB |
1209 | ASSERT_MGD_MTX(ifmgd); |
1210 | ||
47846c9b | 1211 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
8e7cdbb6 TW |
1212 | return; /* ignore ProbeResp to foreign address */ |
1213 | ||
ae6a44e3 EK |
1214 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1215 | if (baselen > len) | |
1216 | return; | |
1217 | ||
1218 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1219 | &elems); | |
1220 | ||
98c8fccf | 1221 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 1222 | |
77fdaa12 | 1223 | if (ifmgd->associated && |
0c1ad2ca | 1224 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
b291ba11 JB |
1225 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1226 | IEEE80211_STA_CONNECTION_POLL)) { | |
1227 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1228 | IEEE80211_STA_BEACON_POLL); | |
4e751843 JB |
1229 | mutex_lock(&sdata->local->iflist_mtx); |
1230 | ieee80211_recalc_ps(sdata->local, -1); | |
1231 | mutex_unlock(&sdata->local->iflist_mtx); | |
b291ba11 JB |
1232 | /* |
1233 | * We've received a probe response, but are not sure whether | |
1234 | * we have or will be receiving any beacons or data, so let's | |
1235 | * schedule the timers again, just in case. | |
1236 | */ | |
1237 | mod_beacon_timer(sdata); | |
1238 | mod_timer(&ifmgd->conn_mon_timer, | |
1239 | round_jiffies_up(jiffies + | |
1240 | IEEE80211_CONNECTION_IDLE_TIME)); | |
4e751843 | 1241 | } |
f0706e82 JB |
1242 | } |
1243 | ||
d91f36db JB |
1244 | /* |
1245 | * This is the canonical list of information elements we care about, | |
1246 | * the filter code also gives us all changes to the Microsoft OUI | |
1247 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1248 | * | |
1249 | * We implement beacon filtering in software since that means we can | |
1250 | * avoid processing the frame here and in cfg80211, and userspace | |
1251 | * will not be able to tell whether the hardware supports it or not. | |
1252 | * | |
1253 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1254 | * add items it requires. It also needs to be able to tell us to | |
1255 | * look out for other vendor IEs. | |
1256 | */ | |
1257 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1258 | (1ULL << WLAN_EID_COUNTRY) | |
1259 | (1ULL << WLAN_EID_ERP_INFO) | | |
1260 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1261 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1262 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1263 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1264 | |
f698d856 | 1265 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1266 | struct ieee80211_mgmt *mgmt, |
1267 | size_t len, | |
1268 | struct ieee80211_rx_status *rx_status) | |
1269 | { | |
d91f36db | 1270 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1271 | size_t baselen; |
1272 | struct ieee802_11_elems elems; | |
f698d856 | 1273 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1274 | u32 changed = 0; |
d91f36db | 1275 | bool erp_valid, directed_tim = false; |
7a5158ef | 1276 | u8 erp_value = 0; |
d91f36db | 1277 | u32 ncrc; |
77fdaa12 JB |
1278 | u8 *bssid; |
1279 | ||
1280 | ASSERT_MGD_MTX(ifmgd); | |
f0706e82 | 1281 | |
ae6a44e3 EK |
1282 | /* Process beacon from the current BSS */ |
1283 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1284 | if (baselen > len) | |
1285 | return; | |
1286 | ||
d91f36db | 1287 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1288 | return; |
f0706e82 | 1289 | |
b291ba11 JB |
1290 | /* |
1291 | * We might have received a number of frames, among them a | |
1292 | * disassoc frame and a beacon... | |
1293 | */ | |
1294 | if (!ifmgd->associated) | |
77fdaa12 JB |
1295 | return; |
1296 | ||
0c1ad2ca | 1297 | bssid = ifmgd->associated->bssid; |
77fdaa12 | 1298 | |
b291ba11 JB |
1299 | /* |
1300 | * And in theory even frames from a different AP we were just | |
1301 | * associated to a split-second ago! | |
1302 | */ | |
1303 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1304 | return; |
1305 | ||
b291ba11 | 1306 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 JM |
1307 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1308 | if (net_ratelimit()) { | |
1309 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
47846c9b | 1310 | "to a received beacon\n", sdata->name); |
92778180 JM |
1311 | } |
1312 | #endif | |
b291ba11 | 1313 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
1314 | mutex_lock(&local->iflist_mtx); |
1315 | ieee80211_recalc_ps(local, -1); | |
1316 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
1317 | } |
1318 | ||
b291ba11 JB |
1319 | /* |
1320 | * Push the beacon loss detection into the future since | |
1321 | * we are processing a beacon from the AP just now. | |
1322 | */ | |
1323 | mod_beacon_timer(sdata); | |
1324 | ||
d91f36db JB |
1325 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1326 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1327 | len - baselen, &elems, | |
1328 | care_about_ies, ncrc); | |
1329 | ||
1330 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1331 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1332 | ifmgd->aid); | |
d91f36db | 1333 | |
30196673 JM |
1334 | if (ncrc != ifmgd->beacon_crc) { |
1335 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, | |
1336 | true); | |
d91f36db | 1337 | |
30196673 JM |
1338 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1339 | elems.wmm_param_len); | |
1340 | } | |
fe3fa827 | 1341 | |
25c9c875 | 1342 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1343 | if (directed_tim) { |
572e0012 KV |
1344 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1345 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1346 | ieee80211_hw_config(local, | |
1347 | IEEE80211_CONF_CHANGE_PS); | |
1348 | ieee80211_send_nullfunc(local, sdata, 0); | |
1349 | } else { | |
1350 | local->pspolling = true; | |
1351 | ||
1352 | /* | |
1353 | * Here is assumed that the driver will be | |
1354 | * able to send ps-poll frame and receive a | |
1355 | * response even though power save mode is | |
1356 | * enabled, but some drivers might require | |
1357 | * to disable power save here. This needs | |
1358 | * to be investigated. | |
1359 | */ | |
1360 | ieee80211_send_pspoll(local, sdata); | |
1361 | } | |
a97b77b9 VN |
1362 | } |
1363 | } | |
7a5158ef | 1364 | |
30196673 JM |
1365 | if (ncrc == ifmgd->beacon_crc) |
1366 | return; | |
1367 | ifmgd->beacon_crc = ncrc; | |
1368 | ||
7a5158ef JB |
1369 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1370 | erp_valid = true; | |
1371 | erp_value = elems.erp_info[0]; | |
1372 | } else { | |
1373 | erp_valid = false; | |
50c4afb9 | 1374 | } |
7a5158ef JB |
1375 | changed |= ieee80211_handle_bss_capability(sdata, |
1376 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1377 | erp_valid, erp_value); | |
f0706e82 | 1378 | |
d3c990fb | 1379 | |
53d6f81c | 1380 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 1381 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
1382 | struct sta_info *sta; |
1383 | struct ieee80211_supported_band *sband; | |
1384 | u16 ap_ht_cap_flags; | |
1385 | ||
1386 | rcu_read_lock(); | |
1387 | ||
abe60632 | 1388 | sta = sta_info_get(sdata, bssid); |
77fdaa12 | 1389 | if (WARN_ON(!sta)) { |
ae5eb026 JB |
1390 | rcu_read_unlock(); |
1391 | return; | |
1392 | } | |
1393 | ||
1394 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1395 | ||
1396 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1397 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1398 | ||
1399 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1400 | ||
1401 | rcu_read_unlock(); | |
1402 | ||
1403 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
77fdaa12 | 1404 | bssid, ap_ht_cap_flags); |
d3c990fb RR |
1405 | } |
1406 | ||
8b19e6ca | 1407 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 1408 | if (elems.country_elem) { |
a8302de9 VT |
1409 | /* TODO: IBSS also needs this */ |
1410 | if (elems.pwr_constr_elem) | |
1411 | ieee80211_handle_pwr_constr(sdata, | |
1412 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1413 | elems.pwr_constr_elem, | |
1414 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1415 | } |
1416 | ||
471b3efd | 1417 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1418 | } |
1419 | ||
46900298 | 1420 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
f1d58c25 | 1421 | struct sk_buff *skb) |
f0706e82 | 1422 | { |
f698d856 | 1423 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1424 | struct ieee80211_mgmt *mgmt; |
1425 | u16 fc; | |
1426 | ||
1427 | if (skb->len < 24) | |
46900298 | 1428 | return RX_DROP_MONITOR; |
f0706e82 JB |
1429 | |
1430 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1431 | fc = le16_to_cpu(mgmt->frame_control); | |
1432 | ||
1433 | switch (fc & IEEE80211_FCTL_STYPE) { | |
f0706e82 JB |
1434 | case IEEE80211_STYPE_PROBE_RESP: |
1435 | case IEEE80211_STYPE_BEACON: | |
f0706e82 JB |
1436 | case IEEE80211_STYPE_DEAUTH: |
1437 | case IEEE80211_STYPE_DISASSOC: | |
77fdaa12 | 1438 | case IEEE80211_STYPE_ACTION: |
46900298 | 1439 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
42935eca | 1440 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
46900298 | 1441 | return RX_QUEUED; |
f0706e82 JB |
1442 | } |
1443 | ||
46900298 | 1444 | return RX_DROP_MONITOR; |
f0706e82 JB |
1445 | } |
1446 | ||
f698d856 | 1447 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1448 | struct sk_buff *skb) |
1449 | { | |
77fdaa12 | 1450 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 1451 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 1452 | struct ieee80211_mgmt *mgmt; |
77fdaa12 | 1453 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
1454 | u16 fc; |
1455 | ||
f0706e82 JB |
1456 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1457 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1458 | fc = le16_to_cpu(mgmt->frame_control); | |
1459 | ||
77fdaa12 JB |
1460 | mutex_lock(&ifmgd->mtx); |
1461 | ||
1462 | if (ifmgd->associated && | |
0c1ad2ca | 1463 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
77fdaa12 JB |
1464 | switch (fc & IEEE80211_FCTL_STYPE) { |
1465 | case IEEE80211_STYPE_BEACON: | |
1466 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1467 | rx_status); | |
1468 | break; | |
1469 | case IEEE80211_STYPE_PROBE_RESP: | |
af6b6374 | 1470 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
77fdaa12 JB |
1471 | break; |
1472 | case IEEE80211_STYPE_DEAUTH: | |
63f170e0 | 1473 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
77fdaa12 JB |
1474 | break; |
1475 | case IEEE80211_STYPE_DISASSOC: | |
1476 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1477 | break; | |
1478 | case IEEE80211_STYPE_ACTION: | |
1479 | /* XXX: differentiate, can only happen for CSA now! */ | |
1480 | ieee80211_sta_process_chanswitch(sdata, | |
1481 | &mgmt->u.action.u.chan_switch.sw_elem, | |
0c1ad2ca | 1482 | (void *)ifmgd->associated->priv); |
77fdaa12 JB |
1483 | break; |
1484 | } | |
1485 | mutex_unlock(&ifmgd->mtx); | |
1486 | ||
1487 | switch (rma) { | |
1488 | case RX_MGMT_NONE: | |
1489 | /* no action */ | |
1490 | break; | |
1491 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 1492 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1493 | break; |
1494 | case RX_MGMT_CFG80211_DISASSOC: | |
ce470613 | 1495 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1496 | break; |
1497 | default: | |
1498 | WARN(1, "unexpected: %d", rma); | |
1499 | } | |
1500 | goto out; | |
1501 | } | |
1502 | ||
77fdaa12 JB |
1503 | mutex_unlock(&ifmgd->mtx); |
1504 | ||
63f170e0 | 1505 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
af6b6374 | 1506 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) |
ce470613 | 1507 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
f0706e82 | 1508 | |
77fdaa12 | 1509 | out: |
f0706e82 JB |
1510 | kfree_skb(skb); |
1511 | } | |
1512 | ||
9c6bd790 | 1513 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1514 | { |
60f8b39c JB |
1515 | struct ieee80211_sub_if_data *sdata = |
1516 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1517 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1518 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1519 | |
5bb644a0 JB |
1520 | if (local->quiescing) { |
1521 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1522 | return; | |
1523 | } | |
1524 | ||
42935eca | 1525 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
f0706e82 JB |
1526 | } |
1527 | ||
9c6bd790 JB |
1528 | static void ieee80211_sta_work(struct work_struct *work) |
1529 | { | |
1530 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1531 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1532 | struct ieee80211_local *local = sdata->local; |
46900298 | 1533 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1534 | struct sk_buff *skb; |
1535 | ||
9607e6b6 | 1536 | if (!ieee80211_sdata_running(sdata)) |
9c6bd790 JB |
1537 | return; |
1538 | ||
fbe9c429 | 1539 | if (local->scanning) |
9c6bd790 JB |
1540 | return; |
1541 | ||
46900298 | 1542 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1543 | return; |
5bb644a0 JB |
1544 | |
1545 | /* | |
42935eca LR |
1546 | * ieee80211_queue_work() should have picked up most cases, |
1547 | * here we'll pick the the rest. | |
5bb644a0 | 1548 | */ |
42935eca LR |
1549 | if (WARN(local->suspended, "STA MLME work scheduled while " |
1550 | "going to suspend\n")) | |
5bb644a0 JB |
1551 | return; |
1552 | ||
46900298 | 1553 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1554 | |
77fdaa12 | 1555 | /* first process frames to avoid timing out while a frame is pending */ |
46900298 | 1556 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1557 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1558 | ||
77fdaa12 JB |
1559 | /* then process the rest of the work */ |
1560 | mutex_lock(&ifmgd->mtx); | |
1561 | ||
b291ba11 JB |
1562 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1563 | IEEE80211_STA_CONNECTION_POLL) && | |
1564 | ifmgd->associated) { | |
a43abf29 ML |
1565 | u8 bssid[ETH_ALEN]; |
1566 | ||
0c1ad2ca | 1567 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 JB |
1568 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1569 | run_again(ifmgd, ifmgd->probe_timeout); | |
a43abf29 ML |
1570 | |
1571 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { | |
1572 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1573 | printk(KERN_DEBUG "No probe response from AP %pM" | |
1574 | " after %dms, try %d\n", bssid, | |
1575 | (1000 * IEEE80211_PROBE_WAIT)/HZ, | |
1576 | ifmgd->probe_send_count); | |
1577 | #endif | |
1578 | ieee80211_mgd_probe_ap_send(sdata); | |
1579 | } else { | |
b291ba11 JB |
1580 | /* |
1581 | * We actually lost the connection ... or did we? | |
1582 | * Let's make sure! | |
1583 | */ | |
1584 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1585 | IEEE80211_STA_BEACON_POLL); | |
b291ba11 JB |
1586 | printk(KERN_DEBUG "No probe response from AP %pM" |
1587 | " after %dms, disconnecting.\n", | |
1588 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); | |
63f170e0 | 1589 | ieee80211_set_disassoc(sdata); |
bc83b681 | 1590 | ieee80211_recalc_idle(local); |
b291ba11 JB |
1591 | mutex_unlock(&ifmgd->mtx); |
1592 | /* | |
1593 | * must be outside lock due to cfg80211, | |
1594 | * but that's not a problem. | |
1595 | */ | |
1596 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1597 | IEEE80211_STYPE_DEAUTH, | |
1598 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
1599 | NULL); | |
1600 | mutex_lock(&ifmgd->mtx); | |
1601 | } | |
1602 | } | |
1603 | ||
77fdaa12 | 1604 | mutex_unlock(&ifmgd->mtx); |
f0706e82 JB |
1605 | } |
1606 | ||
b291ba11 JB |
1607 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1608 | { | |
1609 | struct ieee80211_sub_if_data *sdata = | |
1610 | (struct ieee80211_sub_if_data *) data; | |
1611 | struct ieee80211_local *local = sdata->local; | |
1612 | ||
1613 | if (local->quiescing) | |
1614 | return; | |
1615 | ||
42935eca | 1616 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work); |
b291ba11 JB |
1617 | } |
1618 | ||
1619 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
1620 | { | |
1621 | struct ieee80211_sub_if_data *sdata = | |
1622 | (struct ieee80211_sub_if_data *) data; | |
1623 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1624 | struct ieee80211_local *local = sdata->local; | |
1625 | ||
1626 | if (local->quiescing) | |
1627 | return; | |
1628 | ||
42935eca | 1629 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
1630 | } |
1631 | ||
1632 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
1633 | { | |
1634 | struct ieee80211_sub_if_data *sdata = | |
1635 | container_of(work, struct ieee80211_sub_if_data, | |
1636 | u.mgd.monitor_work); | |
1637 | ||
1638 | ieee80211_mgd_probe_ap(sdata, false); | |
1639 | } | |
1640 | ||
9c6bd790 JB |
1641 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1642 | { | |
ad935687 | 1643 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
1644 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1645 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 1646 | |
b291ba11 | 1647 | /* let's probe the connection once */ |
42935eca | 1648 | ieee80211_queue_work(&sdata->local->hw, |
b291ba11 JB |
1649 | &sdata->u.mgd.monitor_work); |
1650 | /* and do all the other regular work too */ | |
42935eca | 1651 | ieee80211_queue_work(&sdata->local->hw, |
46900298 | 1652 | &sdata->u.mgd.work); |
ad935687 | 1653 | } |
9c6bd790 | 1654 | } |
f0706e82 | 1655 | |
5bb644a0 JB |
1656 | #ifdef CONFIG_PM |
1657 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
1658 | { | |
1659 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1660 | ||
1661 | /* | |
1662 | * we need to use atomic bitops for the running bits | |
1663 | * only because both timers might fire at the same | |
1664 | * time -- the code here is properly synchronised. | |
1665 | */ | |
1666 | ||
1667 | cancel_work_sync(&ifmgd->work); | |
1668 | cancel_work_sync(&ifmgd->beacon_loss_work); | |
1669 | if (del_timer_sync(&ifmgd->timer)) | |
1670 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1671 | ||
1672 | cancel_work_sync(&ifmgd->chswitch_work); | |
1673 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
1674 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 JB |
1675 | |
1676 | cancel_work_sync(&ifmgd->monitor_work); | |
1677 | /* these will just be re-established on connection */ | |
1678 | del_timer_sync(&ifmgd->conn_mon_timer); | |
1679 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
1680 | } |
1681 | ||
1682 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
1683 | { | |
1684 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1685 | ||
1686 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) | |
1687 | add_timer(&ifmgd->timer); | |
1688 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
1689 | add_timer(&ifmgd->chswitch_timer); | |
1690 | } | |
1691 | #endif | |
1692 | ||
9c6bd790 JB |
1693 | /* interface setup */ |
1694 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1695 | { |
46900298 | 1696 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1697 | |
46900298 JB |
1698 | ifmgd = &sdata->u.mgd; |
1699 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
b291ba11 | 1700 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 1701 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
04de8381 | 1702 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 1703 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 1704 | (unsigned long) sdata); |
b291ba11 JB |
1705 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1706 | (unsigned long) sdata); | |
1707 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
1708 | (unsigned long) sdata); | |
46900298 | 1709 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1710 | (unsigned long) sdata); |
46900298 | 1711 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1712 | |
ab1faead | 1713 | ifmgd->flags = 0; |
bbbdff9e | 1714 | |
77fdaa12 | 1715 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
1716 | |
1717 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
1718 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
1719 | else | |
1720 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
1721 | } |
1722 | ||
77fdaa12 JB |
1723 | /* scan finished notification */ |
1724 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 1725 | { |
77fdaa12 | 1726 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 1727 | |
77fdaa12 JB |
1728 | /* Restart STA timers */ |
1729 | rcu_read_lock(); | |
1730 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1731 | ieee80211_restart_sta_timer(sdata); | |
1732 | rcu_read_unlock(); | |
1733 | } | |
60f8b39c | 1734 | |
77fdaa12 JB |
1735 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1736 | unsigned long data, void *dummy) | |
1737 | { | |
1738 | s32 latency_usec = (s32) data; | |
1739 | struct ieee80211_local *local = | |
1740 | container_of(nb, struct ieee80211_local, | |
1741 | network_latency_notifier); | |
1fa6f4af | 1742 | |
77fdaa12 JB |
1743 | mutex_lock(&local->iflist_mtx); |
1744 | ieee80211_recalc_ps(local, latency_usec); | |
1745 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 1746 | |
77fdaa12 | 1747 | return 0; |
9c6bd790 JB |
1748 | } |
1749 | ||
77fdaa12 | 1750 | /* config hooks */ |
af6b6374 JB |
1751 | static enum work_done_result |
1752 | ieee80211_probe_auth_done(struct ieee80211_work *wk, | |
1753 | struct sk_buff *skb) | |
1754 | { | |
1755 | if (!skb) { | |
1756 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); | |
1757 | return WORK_DONE_DESTROY; | |
1758 | } | |
1759 | ||
1760 | if (wk->type == IEEE80211_WORK_AUTH) { | |
1761 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); | |
1762 | return WORK_DONE_DESTROY; | |
1763 | } | |
1764 | ||
1765 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1766 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); | |
1767 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1768 | ||
1769 | wk->type = IEEE80211_WORK_AUTH; | |
1770 | wk->probe_auth.tries = 0; | |
1771 | return WORK_DONE_REQUEUE; | |
1772 | } | |
1773 | ||
77fdaa12 JB |
1774 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
1775 | struct cfg80211_auth_request *req) | |
9c6bd790 | 1776 | { |
77fdaa12 | 1777 | const u8 *ssid; |
f679f65d | 1778 | struct ieee80211_work *wk; |
77fdaa12 | 1779 | u16 auth_alg; |
9c6bd790 | 1780 | |
77fdaa12 JB |
1781 | switch (req->auth_type) { |
1782 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
1783 | auth_alg = WLAN_AUTH_OPEN; | |
1784 | break; | |
1785 | case NL80211_AUTHTYPE_SHARED_KEY: | |
1786 | auth_alg = WLAN_AUTH_SHARED_KEY; | |
1787 | break; | |
1788 | case NL80211_AUTHTYPE_FT: | |
1789 | auth_alg = WLAN_AUTH_FT; | |
1790 | break; | |
1791 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
1792 | auth_alg = WLAN_AUTH_LEAP; | |
1793 | break; | |
1794 | default: | |
1795 | return -EOPNOTSUPP; | |
60f8b39c | 1796 | } |
77fdaa12 JB |
1797 | |
1798 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); | |
1799 | if (!wk) | |
9c6bd790 | 1800 | return -ENOMEM; |
77fdaa12 | 1801 | |
5e124bd5 | 1802 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
77fdaa12 JB |
1803 | |
1804 | if (req->ie && req->ie_len) { | |
1805 | memcpy(wk->ie, req->ie, req->ie_len); | |
1806 | wk->ie_len = req->ie_len; | |
9c6bd790 | 1807 | } |
77fdaa12 | 1808 | |
fffd0934 | 1809 | if (req->key && req->key_len) { |
af6b6374 JB |
1810 | wk->probe_auth.key_len = req->key_len; |
1811 | wk->probe_auth.key_idx = req->key_idx; | |
1812 | memcpy(wk->probe_auth.key, req->key, req->key_len); | |
fffd0934 JB |
1813 | } |
1814 | ||
77fdaa12 | 1815 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
af6b6374 JB |
1816 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
1817 | wk->probe_auth.ssid_len = ssid[1]; | |
f679f65d | 1818 | |
af6b6374 JB |
1819 | wk->probe_auth.algorithm = auth_alg; |
1820 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; | |
77fdaa12 | 1821 | |
af6b6374 | 1822 | wk->type = IEEE80211_WORK_DIRECT_PROBE; |
f679f65d | 1823 | wk->chan = req->bss->channel; |
af6b6374 JB |
1824 | wk->sdata = sdata; |
1825 | wk->done = ieee80211_probe_auth_done; | |
77fdaa12 | 1826 | |
af6b6374 | 1827 | ieee80211_add_work(wk); |
9c6bd790 | 1828 | return 0; |
60f8b39c JB |
1829 | } |
1830 | ||
af6b6374 JB |
1831 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
1832 | struct sk_buff *skb) | |
1833 | { | |
1834 | struct ieee80211_mgmt *mgmt; | |
1835 | u16 status; | |
1836 | ||
1837 | if (!skb) { | |
1838 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); | |
1839 | return WORK_DONE_DESTROY; | |
1840 | } | |
1841 | ||
1842 | mgmt = (void *)skb->data; | |
1843 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1844 | ||
1845 | if (status == WLAN_STATUS_SUCCESS) { | |
1846 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1847 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { | |
1848 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1849 | /* oops -- internal error -- send timeout for now */ | |
1850 | cfg80211_send_assoc_timeout(wk->sdata->dev, | |
1851 | wk->filter_ta); | |
1852 | return WORK_DONE_DESTROY; | |
1853 | } | |
1854 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1855 | } | |
1856 | ||
1857 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); | |
1858 | return WORK_DONE_DESTROY; | |
1859 | } | |
1860 | ||
77fdaa12 JB |
1861 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
1862 | struct cfg80211_assoc_request *req) | |
f0706e82 | 1863 | { |
77fdaa12 | 1864 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 1865 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
f679f65d | 1866 | struct ieee80211_work *wk; |
63f170e0 | 1867 | const u8 *ssid; |
af6b6374 | 1868 | int i; |
f0706e82 | 1869 | |
77fdaa12 | 1870 | mutex_lock(&ifmgd->mtx); |
af6b6374 JB |
1871 | if (ifmgd->associated) { |
1872 | mutex_unlock(&ifmgd->mtx); | |
1873 | return -EALREADY; | |
1874 | } | |
1875 | mutex_unlock(&ifmgd->mtx); | |
77fdaa12 | 1876 | |
63f170e0 | 1877 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
af6b6374 JB |
1878 | if (!wk) |
1879 | return -ENOMEM; | |
77fdaa12 | 1880 | |
77fdaa12 JB |
1881 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
1882 | ||
1883 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) | |
1884 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
1885 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
1886 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
1887 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
1888 | ||
77fdaa12 JB |
1889 | |
1890 | if (req->ie && req->ie_len) { | |
1891 | memcpy(wk->ie, req->ie, req->ie_len); | |
1892 | wk->ie_len = req->ie_len; | |
1893 | } else | |
1894 | wk->ie_len = 0; | |
1895 | ||
0c1ad2ca | 1896 | wk->assoc.bss = req->bss; |
f679f65d | 1897 | |
af6b6374 | 1898 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
f679f65d | 1899 | |
af6b6374 JB |
1900 | /* new association always uses requested smps mode */ |
1901 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { | |
1902 | if (ifmgd->powersave) | |
1903 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
1904 | else | |
1905 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
1906 | } else | |
1907 | ifmgd->ap_smps = ifmgd->req_smps; | |
1908 | ||
1909 | wk->assoc.smps = ifmgd->ap_smps; | |
77c8144a JB |
1910 | /* |
1911 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
1912 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
1913 | * ciphers is configured as pairwise. | |
1914 | * We can set this to true for non-11n hardware, that'll be checked | |
1915 | * separately along with the peer capabilities. | |
1916 | */ | |
af6b6374 | 1917 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
f679f65d | 1918 | wk->assoc.capability = req->bss->capability; |
0c1ad2ca JB |
1919 | wk->assoc.wmm_used = bss->wmm_used; |
1920 | wk->assoc.supp_rates = bss->supp_rates; | |
1921 | wk->assoc.supp_rates_len = bss->supp_rates_len; | |
f679f65d JB |
1922 | wk->assoc.ht_information_ie = |
1923 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); | |
63f170e0 | 1924 | |
ab13315a KV |
1925 | if (bss->wmm_used && bss->uapsd_supported && |
1926 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
1927 | wk->assoc.uapsd_used = true; | |
1928 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; | |
1929 | } else { | |
1930 | wk->assoc.uapsd_used = false; | |
1931 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; | |
1932 | } | |
1933 | ||
63f170e0 | 1934 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
f679f65d JB |
1935 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
1936 | wk->assoc.ssid_len = ssid[1]; | |
63f170e0 | 1937 | |
77fdaa12 | 1938 | if (req->prev_bssid) |
f679f65d | 1939 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 | 1940 | |
f679f65d | 1941 | wk->type = IEEE80211_WORK_ASSOC; |
f679f65d | 1942 | wk->chan = req->bss->channel; |
af6b6374 JB |
1943 | wk->sdata = sdata; |
1944 | wk->done = ieee80211_assoc_done; | |
77fdaa12 JB |
1945 | |
1946 | if (req->use_mfp) { | |
1947 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
1948 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
1949 | } else { | |
1950 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
1951 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
1952 | } | |
1953 | ||
1954 | if (req->crypto.control_port) | |
1955 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
1956 | else | |
1957 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
1958 | ||
af6b6374 JB |
1959 | ieee80211_add_work(wk); |
1960 | return 0; | |
f0706e82 JB |
1961 | } |
1962 | ||
77fdaa12 | 1963 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
1964 | struct cfg80211_deauth_request *req, |
1965 | void *cookie) | |
f0706e82 | 1966 | { |
af6b6374 | 1967 | struct ieee80211_local *local = sdata->local; |
46900298 | 1968 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f679f65d | 1969 | struct ieee80211_work *wk; |
63f170e0 | 1970 | const u8 *bssid = req->bss->bssid; |
f0706e82 | 1971 | |
77fdaa12 JB |
1972 | mutex_lock(&ifmgd->mtx); |
1973 | ||
0c1ad2ca | 1974 | if (ifmgd->associated == req->bss) { |
77fdaa12 | 1975 | bssid = req->bss->bssid; |
63f170e0 | 1976 | ieee80211_set_disassoc(sdata); |
af6b6374 JB |
1977 | mutex_unlock(&ifmgd->mtx); |
1978 | } else { | |
1979 | bool not_auth_yet = false; | |
f0706e82 | 1980 | |
a58ce43f | 1981 | mutex_unlock(&ifmgd->mtx); |
a58ce43f | 1982 | |
af6b6374 JB |
1983 | mutex_lock(&local->work_mtx); |
1984 | list_for_each_entry(wk, &local->work_list, list) { | |
1985 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE) | |
1986 | continue; | |
1987 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) | |
1988 | continue; | |
1989 | not_auth_yet = true; | |
1990 | list_del(&wk->list); | |
1991 | free_work(wk); | |
1992 | break; | |
1993 | } | |
1994 | mutex_unlock(&local->work_mtx); | |
1995 | ||
1996 | /* | |
1997 | * If somebody requests authentication and we haven't | |
1998 | * sent out an auth frame yet there's no need to send | |
1999 | * out a deauth frame either. If the state was PROBE, | |
2000 | * then this is the case. If it's AUTH we have sent a | |
2001 | * frame, and if it's IDLE we have completed the auth | |
2002 | * process already. | |
2003 | */ | |
2004 | if (not_auth_yet) { | |
2005 | __cfg80211_auth_canceled(sdata->dev, bssid); | |
2006 | return 0; | |
2007 | } | |
2008 | } | |
77fdaa12 | 2009 | |
0ff71613 | 2010 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
47846c9b | 2011 | sdata->name, bssid, req->reason_code); |
0ff71613 | 2012 | |
77fdaa12 | 2013 | ieee80211_send_deauth_disassoc(sdata, bssid, |
667503dd JB |
2014 | IEEE80211_STYPE_DEAUTH, req->reason_code, |
2015 | cookie); | |
f0706e82 | 2016 | |
bc83b681 JB |
2017 | ieee80211_recalc_idle(sdata->local); |
2018 | ||
f0706e82 JB |
2019 | return 0; |
2020 | } | |
84363e6e | 2021 | |
77fdaa12 | 2022 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2023 | struct cfg80211_disassoc_request *req, |
2024 | void *cookie) | |
9c6bd790 | 2025 | { |
77fdaa12 | 2026 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2027 | |
77fdaa12 | 2028 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 2029 | |
8d8b261a JB |
2030 | /* |
2031 | * cfg80211 should catch this ... but it's racy since | |
2032 | * we can receive a disassoc frame, process it, hand it | |
2033 | * to cfg80211 while that's in a locked section already | |
2034 | * trying to tell us that the user wants to disconnect. | |
2035 | */ | |
0c1ad2ca | 2036 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
2037 | mutex_unlock(&ifmgd->mtx); |
2038 | return -ENOLINK; | |
2039 | } | |
2040 | ||
0ff71613 | 2041 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 2042 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 2043 | |
63f170e0 | 2044 | ieee80211_set_disassoc(sdata); |
77fdaa12 JB |
2045 | |
2046 | mutex_unlock(&ifmgd->mtx); | |
10f644a4 | 2047 | |
77fdaa12 | 2048 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
667503dd JB |
2049 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
2050 | cookie); | |
bc83b681 JB |
2051 | |
2052 | ieee80211_recalc_idle(sdata->local); | |
2053 | ||
10f644a4 JB |
2054 | return 0; |
2055 | } |