Commit | Line | Data |
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c2d1560a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * utilities for mac80211 | |
12 | */ | |
13 | ||
14 | #include <net/mac80211.h> | |
15 | #include <linux/netdevice.h> | |
bc3b2d7f | 16 | #include <linux/export.h> |
c2d1560a JB |
17 | #include <linux/types.h> |
18 | #include <linux/slab.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/if_arp.h> | |
c2d1560a | 22 | #include <linux/bitmap.h> |
dd76986b | 23 | #include <linux/crc32.h> |
881d966b | 24 | #include <net/net_namespace.h> |
c2d1560a | 25 | #include <net/cfg80211.h> |
dabeb344 | 26 | #include <net/rtnetlink.h> |
c2d1560a JB |
27 | |
28 | #include "ieee80211_i.h" | |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "rate.h" |
ee385855 | 31 | #include "mesh.h" |
c2d1560a | 32 | #include "wme.h" |
f2753ddb | 33 | #include "led.h" |
fffd0934 | 34 | #include "wep.h" |
c2d1560a JB |
35 | |
36 | /* privid for wiphys to determine whether they belong to us or not */ | |
37 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
38 | ||
9a95371a LR |
39 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
40 | { | |
41 | struct ieee80211_local *local; | |
42 | BUG_ON(!wiphy); | |
43 | ||
44 | local = wiphy_priv(wiphy); | |
45 | return &local->hw; | |
46 | } | |
47 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 48 | |
71364716 | 49 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 50 | enum nl80211_iftype type) |
c2d1560a | 51 | { |
a494bb1c | 52 | __le16 fc = hdr->frame_control; |
c2d1560a | 53 | |
98f0b0a3 RR |
54 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
55 | if (len < 16) | |
c2d1560a JB |
56 | return NULL; |
57 | ||
a494bb1c | 58 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
59 | if (len < 24) /* drop incorrect hdr len (data) */ |
60 | return NULL; | |
a494bb1c HH |
61 | |
62 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 63 | return NULL; |
a494bb1c HH |
64 | if (ieee80211_has_tods(fc)) |
65 | return hdr->addr1; | |
66 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 67 | return hdr->addr2; |
a494bb1c HH |
68 | |
69 | return hdr->addr3; | |
70 | } | |
71 | ||
72 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
73 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
74 | return NULL; | |
c2d1560a | 75 | return hdr->addr3; |
a494bb1c HH |
76 | } |
77 | ||
78 | if (ieee80211_is_ctl(fc)) { | |
79 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 80 | return hdr->addr1; |
a494bb1c HH |
81 | |
82 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 83 | switch (type) { |
05c914fe | 84 | case NL80211_IFTYPE_STATION: |
71364716 | 85 | return hdr->addr2; |
05c914fe JB |
86 | case NL80211_IFTYPE_AP: |
87 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
88 | return hdr->addr1; |
89 | default: | |
a494bb1c | 90 | break; /* fall through to the return */ |
71364716 RR |
91 | } |
92 | } | |
c2d1560a JB |
93 | } |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
5cf121c3 | 98 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 99 | { |
252b86c4 | 100 | struct sk_buff *skb; |
2de8e0d9 JB |
101 | struct ieee80211_hdr *hdr; |
102 | ||
252b86c4 | 103 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 JB |
104 | hdr = (struct ieee80211_hdr *) skb->data; |
105 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
252b86c4 | 106 | } |
c2d1560a JB |
107 | } |
108 | ||
4ee73f33 | 109 | int ieee80211_frame_duration(enum ieee80211_band band, size_t len, |
c2d1560a JB |
110 | int rate, int erp, int short_preamble) |
111 | { | |
112 | int dur; | |
113 | ||
114 | /* calculate duration (in microseconds, rounded up to next higher | |
115 | * integer if it includes a fractional microsecond) to send frame of | |
116 | * len bytes (does not include FCS) at the given rate. Duration will | |
117 | * also include SIFS. | |
118 | * | |
119 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
120 | * DIV_ROUND_UP() operations. | |
121 | */ | |
122 | ||
4ee73f33 | 123 | if (band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
124 | /* |
125 | * OFDM: | |
126 | * | |
127 | * N_DBPS = DATARATE x 4 | |
128 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
129 | * (16 = SIGNAL time, 6 = tail bits) | |
130 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
131 | * | |
132 | * T_SYM = 4 usec | |
133 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
134 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
135 | * signal ext = 6 usec | |
136 | */ | |
c2d1560a JB |
137 | dur = 16; /* SIFS + signal ext */ |
138 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
139 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
140 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
141 | 4 * rate); /* T_SYM x N_SYM */ | |
142 | } else { | |
143 | /* | |
144 | * 802.11b or 802.11g with 802.11b compatibility: | |
145 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
146 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
147 | * | |
148 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
149 | * aSIFSTime = 10 usec | |
150 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
151 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
152 | */ | |
153 | dur = 10; /* aSIFSTime = 10 usec */ | |
154 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
155 | ||
156 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
157 | } | |
158 | ||
159 | return dur; | |
160 | } | |
161 | ||
162 | /* Exported duration function for driver use */ | |
32bfd35d JB |
163 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
164 | struct ieee80211_vif *vif, | |
4ee73f33 | 165 | enum ieee80211_band band, |
8318d78a JB |
166 | size_t frame_len, |
167 | struct ieee80211_rate *rate) | |
c2d1560a | 168 | { |
25d834e1 | 169 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
170 | u16 dur; |
171 | int erp; | |
25d834e1 | 172 | bool short_preamble = false; |
c2d1560a | 173 | |
8318d78a | 174 | erp = 0; |
25d834e1 JB |
175 | if (vif) { |
176 | sdata = vif_to_sdata(vif); | |
bda3933a | 177 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
178 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
179 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
180 | } | |
8318d78a | 181 | |
4ee73f33 | 182 | dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, |
25d834e1 | 183 | short_preamble); |
c2d1560a JB |
184 | |
185 | return cpu_to_le16(dur); | |
186 | } | |
187 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
188 | ||
32bfd35d JB |
189 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
190 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 191 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
192 | { |
193 | struct ieee80211_local *local = hw_to_local(hw); | |
194 | struct ieee80211_rate *rate; | |
25d834e1 | 195 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 196 | bool short_preamble; |
c2d1560a JB |
197 | int erp; |
198 | u16 dur; | |
2e92e6f2 JB |
199 | struct ieee80211_supported_band *sband; |
200 | ||
4ee73f33 | 201 | sband = local->hw.wiphy->bands[frame_txctl->band]; |
c2d1560a | 202 | |
25d834e1 | 203 | short_preamble = false; |
7e9ed188 | 204 | |
e039fa4a | 205 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
206 | |
207 | erp = 0; | |
25d834e1 JB |
208 | if (vif) { |
209 | sdata = vif_to_sdata(vif); | |
bda3933a | 210 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
211 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
212 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
213 | } | |
c2d1560a JB |
214 | |
215 | /* CTS duration */ | |
4ee73f33 | 216 | dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate, |
c2d1560a JB |
217 | erp, short_preamble); |
218 | /* Data frame duration */ | |
4ee73f33 | 219 | dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate, |
c2d1560a JB |
220 | erp, short_preamble); |
221 | /* ACK duration */ | |
4ee73f33 | 222 | dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate, |
c2d1560a JB |
223 | erp, short_preamble); |
224 | ||
225 | return cpu_to_le16(dur); | |
226 | } | |
227 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
228 | ||
32bfd35d JB |
229 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
230 | struct ieee80211_vif *vif, | |
c2d1560a | 231 | size_t frame_len, |
e039fa4a | 232 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
233 | { |
234 | struct ieee80211_local *local = hw_to_local(hw); | |
235 | struct ieee80211_rate *rate; | |
25d834e1 | 236 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 237 | bool short_preamble; |
c2d1560a JB |
238 | int erp; |
239 | u16 dur; | |
2e92e6f2 JB |
240 | struct ieee80211_supported_band *sband; |
241 | ||
4ee73f33 | 242 | sband = local->hw.wiphy->bands[frame_txctl->band]; |
c2d1560a | 243 | |
25d834e1 | 244 | short_preamble = false; |
7e9ed188 | 245 | |
e039fa4a | 246 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 247 | erp = 0; |
25d834e1 JB |
248 | if (vif) { |
249 | sdata = vif_to_sdata(vif); | |
bda3933a | 250 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
251 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
252 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
253 | } | |
c2d1560a JB |
254 | |
255 | /* Data frame duration */ | |
4ee73f33 | 256 | dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate, |
c2d1560a | 257 | erp, short_preamble); |
e039fa4a | 258 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 259 | /* ACK duration */ |
4ee73f33 | 260 | dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate, |
c2d1560a JB |
261 | erp, short_preamble); |
262 | } | |
263 | ||
264 | return cpu_to_le16(dur); | |
265 | } | |
266 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
267 | ||
3a25a8c8 JB |
268 | void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) |
269 | { | |
270 | struct ieee80211_sub_if_data *sdata; | |
a6f38ac3 JB |
271 | int n_acs = IEEE80211_NUM_ACS; |
272 | ||
273 | if (local->hw.queues < IEEE80211_NUM_ACS) | |
274 | n_acs = 1; | |
3a25a8c8 JB |
275 | |
276 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
277 | int ac; | |
278 | ||
f142c6b9 JB |
279 | if (!sdata->dev) |
280 | continue; | |
281 | ||
3a25a8c8 JB |
282 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) |
283 | continue; | |
284 | ||
285 | if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && | |
286 | local->queue_stop_reasons[sdata->vif.cab_queue] != 0) | |
287 | continue; | |
288 | ||
a6f38ac3 | 289 | for (ac = 0; ac < n_acs; ac++) { |
3a25a8c8 JB |
290 | int ac_queue = sdata->vif.hw_queue[ac]; |
291 | ||
292 | if (ac_queue == queue || | |
293 | (sdata->vif.cab_queue == queue && | |
294 | local->queue_stop_reasons[ac_queue] == 0 && | |
295 | skb_queue_empty(&local->pending[ac_queue]))) | |
296 | netif_wake_subqueue(sdata->dev, ac); | |
297 | } | |
298 | } | |
299 | } | |
300 | ||
ce7c9111 KV |
301 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
302 | enum queue_stop_reason reason) | |
c2d1560a JB |
303 | { |
304 | struct ieee80211_local *local = hw_to_local(hw); | |
305 | ||
b5878a2d JB |
306 | trace_wake_queue(local, queue, reason); |
307 | ||
e4e72fb4 JB |
308 | if (WARN_ON(queue >= hw->queues)) |
309 | return; | |
ce7c9111 | 310 | |
ada15125 JB |
311 | if (!test_bit(reason, &local->queue_stop_reasons[queue])) |
312 | return; | |
313 | ||
96f5e66e JB |
314 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
315 | ||
316 | if (local->queue_stop_reasons[queue] != 0) | |
317 | /* someone still has this queue stopped */ | |
318 | return; | |
319 | ||
7236fe29 JB |
320 | if (skb_queue_empty(&local->pending[queue])) { |
321 | rcu_read_lock(); | |
3a25a8c8 | 322 | ieee80211_propagate_queue_wake(local, queue); |
7236fe29 JB |
323 | rcu_read_unlock(); |
324 | } else | |
3b8d81e0 | 325 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 326 | } |
ce7c9111 | 327 | |
96f5e66e JB |
328 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
329 | enum queue_stop_reason reason) | |
ce7c9111 KV |
330 | { |
331 | struct ieee80211_local *local = hw_to_local(hw); | |
332 | unsigned long flags; | |
333 | ||
334 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
335 | __ieee80211_wake_queue(hw, queue, reason); | |
336 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
337 | } | |
338 | ||
339 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
340 | { | |
341 | ieee80211_wake_queue_by_reason(hw, queue, | |
342 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
343 | } | |
c2d1560a JB |
344 | EXPORT_SYMBOL(ieee80211_wake_queue); |
345 | ||
ce7c9111 KV |
346 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
347 | enum queue_stop_reason reason) | |
c2d1560a JB |
348 | { |
349 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 350 | struct ieee80211_sub_if_data *sdata; |
a6f38ac3 | 351 | int n_acs = IEEE80211_NUM_ACS; |
c2d1560a | 352 | |
b5878a2d JB |
353 | trace_stop_queue(local, queue, reason); |
354 | ||
e4e72fb4 JB |
355 | if (WARN_ON(queue >= hw->queues)) |
356 | return; | |
96f5e66e | 357 | |
ada15125 JB |
358 | if (test_bit(reason, &local->queue_stop_reasons[queue])) |
359 | return; | |
360 | ||
2a577d98 | 361 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 | 362 | |
a6f38ac3 JB |
363 | if (local->hw.queues < IEEE80211_NUM_ACS) |
364 | n_acs = 1; | |
365 | ||
cf0277e7 | 366 | rcu_read_lock(); |
3a25a8c8 JB |
367 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
368 | int ac; | |
369 | ||
f142c6b9 JB |
370 | if (!sdata->dev) |
371 | continue; | |
372 | ||
a6f38ac3 | 373 | for (ac = 0; ac < n_acs; ac++) { |
3a25a8c8 JB |
374 | if (sdata->vif.hw_queue[ac] == queue || |
375 | sdata->vif.cab_queue == queue) | |
376 | netif_stop_subqueue(sdata->dev, ac); | |
377 | } | |
378 | } | |
cf0277e7 | 379 | rcu_read_unlock(); |
c2d1560a | 380 | } |
ce7c9111 | 381 | |
96f5e66e JB |
382 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
383 | enum queue_stop_reason reason) | |
ce7c9111 KV |
384 | { |
385 | struct ieee80211_local *local = hw_to_local(hw); | |
386 | unsigned long flags; | |
387 | ||
388 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
389 | __ieee80211_stop_queue(hw, queue, reason); | |
390 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
391 | } | |
392 | ||
393 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
394 | { | |
395 | ieee80211_stop_queue_by_reason(hw, queue, | |
396 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
397 | } | |
c2d1560a JB |
398 | EXPORT_SYMBOL(ieee80211_stop_queue); |
399 | ||
8f77f384 JB |
400 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
401 | struct sk_buff *skb) | |
402 | { | |
403 | struct ieee80211_hw *hw = &local->hw; | |
404 | unsigned long flags; | |
a7bc376c | 405 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
3a25a8c8 | 406 | int queue = info->hw_queue; |
a7bc376c JB |
407 | |
408 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 409 | kfree_skb(skb); |
a7bc376c JB |
410 | return; |
411 | } | |
8f77f384 JB |
412 | |
413 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
414 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 415 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
416 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
417 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
418 | } | |
419 | ||
b0b97a8a JB |
420 | void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
421 | struct sk_buff_head *skbs, | |
422 | void (*fn)(void *data), void *data) | |
8f77f384 JB |
423 | { |
424 | struct ieee80211_hw *hw = &local->hw; | |
425 | struct sk_buff *skb; | |
426 | unsigned long flags; | |
b0b97a8a | 427 | int queue, i; |
8f77f384 JB |
428 | |
429 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
8f77f384 | 430 | while ((skb = skb_dequeue(skbs))) { |
a7bc376c JB |
431 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
432 | ||
433 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 434 | kfree_skb(skb); |
a7bc376c JB |
435 | continue; |
436 | } | |
437 | ||
3a25a8c8 | 438 | queue = info->hw_queue; |
4644ae89 JB |
439 | |
440 | __ieee80211_stop_queue(hw, queue, | |
441 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
442 | ||
3b8d81e0 | 443 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
444 | } |
445 | ||
50a9432d JB |
446 | if (fn) |
447 | fn(data); | |
448 | ||
3b8d81e0 | 449 | for (i = 0; i < hw->queues; i++) |
8f77f384 JB |
450 | __ieee80211_wake_queue(hw, i, |
451 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
8f77f384 | 452 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
8f77f384 JB |
453 | } |
454 | ||
ce7c9111 KV |
455 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
456 | enum queue_stop_reason reason) | |
c2d1560a | 457 | { |
ce7c9111 KV |
458 | struct ieee80211_local *local = hw_to_local(hw); |
459 | unsigned long flags; | |
c2d1560a JB |
460 | int i; |
461 | ||
ce7c9111 KV |
462 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
463 | ||
96f5e66e | 464 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
465 | __ieee80211_stop_queue(hw, i, reason); |
466 | ||
467 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
468 | } | |
469 | ||
470 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
471 | { | |
472 | ieee80211_stop_queues_by_reason(hw, | |
473 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
474 | } |
475 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
476 | ||
92ab8535 TW |
477 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
478 | { | |
479 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
480 | unsigned long flags; |
481 | int ret; | |
96f5e66e | 482 | |
e4e72fb4 JB |
483 | if (WARN_ON(queue >= hw->queues)) |
484 | return true; | |
96f5e66e | 485 | |
3b8d81e0 JB |
486 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
487 | ret = !!local->queue_stop_reasons[queue]; | |
488 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
489 | return ret; | |
92ab8535 TW |
490 | } |
491 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
492 | ||
ce7c9111 KV |
493 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
494 | enum queue_stop_reason reason) | |
c2d1560a | 495 | { |
ce7c9111 KV |
496 | struct ieee80211_local *local = hw_to_local(hw); |
497 | unsigned long flags; | |
c2d1560a JB |
498 | int i; |
499 | ||
ce7c9111 KV |
500 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
501 | ||
e4e72fb4 | 502 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
503 | __ieee80211_wake_queue(hw, i, reason); |
504 | ||
505 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
506 | } | |
507 | ||
508 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
509 | { | |
510 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
511 | } |
512 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 513 | |
32bfd35d JB |
514 | void ieee80211_iterate_active_interfaces( |
515 | struct ieee80211_hw *hw, | |
516 | void (*iterator)(void *data, u8 *mac, | |
517 | struct ieee80211_vif *vif), | |
518 | void *data) | |
dabeb344 JB |
519 | { |
520 | struct ieee80211_local *local = hw_to_local(hw); | |
521 | struct ieee80211_sub_if_data *sdata; | |
522 | ||
c771c9d8 | 523 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
524 | |
525 | list_for_each_entry(sdata, &local->interfaces, list) { | |
526 | switch (sdata->vif.type) { | |
05c914fe JB |
527 | case NL80211_IFTYPE_MONITOR: |
528 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 529 | continue; |
2ca27bcf | 530 | default: |
2f561feb ID |
531 | break; |
532 | } | |
9607e6b6 | 533 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 534 | iterator(data, sdata->vif.addr, |
2f561feb ID |
535 | &sdata->vif); |
536 | } | |
537 | ||
685fb72b JB |
538 | sdata = rcu_dereference_protected(local->monitor_sdata, |
539 | lockdep_is_held(&local->iflist_mtx)); | |
540 | if (sdata) | |
541 | iterator(data, sdata->vif.addr, &sdata->vif); | |
542 | ||
c771c9d8 | 543 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
544 | } |
545 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
546 | ||
547 | void ieee80211_iterate_active_interfaces_atomic( | |
548 | struct ieee80211_hw *hw, | |
549 | void (*iterator)(void *data, u8 *mac, | |
550 | struct ieee80211_vif *vif), | |
551 | void *data) | |
552 | { | |
553 | struct ieee80211_local *local = hw_to_local(hw); | |
554 | struct ieee80211_sub_if_data *sdata; | |
555 | ||
e38bad47 | 556 | rcu_read_lock(); |
dabeb344 | 557 | |
e38bad47 | 558 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 559 | switch (sdata->vif.type) { |
05c914fe JB |
560 | case NL80211_IFTYPE_MONITOR: |
561 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 562 | continue; |
2ca27bcf | 563 | default: |
dabeb344 JB |
564 | break; |
565 | } | |
9607e6b6 | 566 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 567 | iterator(data, sdata->vif.addr, |
32bfd35d | 568 | &sdata->vif); |
dabeb344 | 569 | } |
e38bad47 | 570 | |
685fb72b JB |
571 | sdata = rcu_dereference(local->monitor_sdata); |
572 | if (sdata) | |
573 | iterator(data, sdata->vif.addr, &sdata->vif); | |
574 | ||
e38bad47 | 575 | rcu_read_unlock(); |
dabeb344 | 576 | } |
2f561feb | 577 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 578 | |
42935eca LR |
579 | /* |
580 | * Nothing should have been stuffed into the workqueue during | |
581 | * the suspend->resume cycle. If this WARN is seen then there | |
582 | * is a bug with either the driver suspend or something in | |
583 | * mac80211 stuffing into the workqueue which we haven't yet | |
584 | * cleared during mac80211's suspend cycle. | |
585 | */ | |
586 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
587 | { | |
ceb99fe0 JB |
588 | if (WARN(local->suspended && !local->resuming, |
589 | "queueing ieee80211 work while going to suspend\n")) | |
590 | return false; | |
42935eca LR |
591 | |
592 | return true; | |
593 | } | |
594 | ||
595 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
596 | { | |
597 | struct ieee80211_local *local = hw_to_local(hw); | |
598 | ||
599 | if (!ieee80211_can_queue_work(local)) | |
600 | return; | |
601 | ||
602 | queue_work(local->workqueue, work); | |
603 | } | |
604 | EXPORT_SYMBOL(ieee80211_queue_work); | |
605 | ||
606 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
607 | struct delayed_work *dwork, | |
608 | unsigned long delay) | |
609 | { | |
610 | struct ieee80211_local *local = hw_to_local(hw); | |
611 | ||
612 | if (!ieee80211_can_queue_work(local)) | |
613 | return; | |
614 | ||
615 | queue_delayed_work(local->workqueue, dwork, delay); | |
616 | } | |
617 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
618 | ||
dd76986b JB |
619 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
620 | struct ieee802_11_elems *elems, | |
621 | u64 filter, u32 crc) | |
622 | { | |
623 | size_t left = len; | |
624 | u8 *pos = start; | |
625 | bool calc_crc = filter != 0; | |
fcff4f10 | 626 | DECLARE_BITMAP(seen_elems, 256); |
dd76986b | 627 | |
fcff4f10 | 628 | bitmap_zero(seen_elems, 256); |
dd76986b JB |
629 | memset(elems, 0, sizeof(*elems)); |
630 | elems->ie_start = start; | |
631 | elems->total_len = len; | |
632 | ||
633 | while (left >= 2) { | |
634 | u8 id, elen; | |
fcff4f10 | 635 | bool elem_parse_failed; |
dd76986b JB |
636 | |
637 | id = *pos++; | |
638 | elen = *pos++; | |
639 | left -= 2; | |
640 | ||
fcff4f10 PS |
641 | if (elen > left) { |
642 | elems->parse_error = true; | |
dd76986b | 643 | break; |
fcff4f10 PS |
644 | } |
645 | ||
646 | if (id != WLAN_EID_VENDOR_SPECIFIC && | |
647 | id != WLAN_EID_QUIET && | |
648 | test_bit(id, seen_elems)) { | |
649 | elems->parse_error = true; | |
650 | left -= elen; | |
651 | pos += elen; | |
652 | continue; | |
653 | } | |
dd76986b JB |
654 | |
655 | if (calc_crc && id < 64 && (filter & (1ULL << id))) | |
656 | crc = crc32_be(crc, pos - 2, elen + 2); | |
657 | ||
fcff4f10 PS |
658 | elem_parse_failed = false; |
659 | ||
dd76986b JB |
660 | switch (id) { |
661 | case WLAN_EID_SSID: | |
662 | elems->ssid = pos; | |
663 | elems->ssid_len = elen; | |
664 | break; | |
665 | case WLAN_EID_SUPP_RATES: | |
666 | elems->supp_rates = pos; | |
667 | elems->supp_rates_len = elen; | |
668 | break; | |
669 | case WLAN_EID_FH_PARAMS: | |
670 | elems->fh_params = pos; | |
671 | elems->fh_params_len = elen; | |
672 | break; | |
673 | case WLAN_EID_DS_PARAMS: | |
674 | elems->ds_params = pos; | |
675 | elems->ds_params_len = elen; | |
676 | break; | |
677 | case WLAN_EID_CF_PARAMS: | |
678 | elems->cf_params = pos; | |
679 | elems->cf_params_len = elen; | |
680 | break; | |
681 | case WLAN_EID_TIM: | |
682 | if (elen >= sizeof(struct ieee80211_tim_ie)) { | |
683 | elems->tim = (void *)pos; | |
684 | elems->tim_len = elen; | |
fcff4f10 PS |
685 | } else |
686 | elem_parse_failed = true; | |
dd76986b JB |
687 | break; |
688 | case WLAN_EID_IBSS_PARAMS: | |
689 | elems->ibss_params = pos; | |
690 | elems->ibss_params_len = elen; | |
691 | break; | |
692 | case WLAN_EID_CHALLENGE: | |
693 | elems->challenge = pos; | |
694 | elems->challenge_len = elen; | |
695 | break; | |
696 | case WLAN_EID_VENDOR_SPECIFIC: | |
697 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
698 | pos[2] == 0xf2) { | |
699 | /* Microsoft OUI (00:50:F2) */ | |
700 | ||
701 | if (calc_crc) | |
702 | crc = crc32_be(crc, pos - 2, elen + 2); | |
703 | ||
704 | if (pos[3] == 1) { | |
705 | /* OUI Type 1 - WPA IE */ | |
706 | elems->wpa = pos; | |
707 | elems->wpa_len = elen; | |
708 | } else if (elen >= 5 && pos[3] == 2) { | |
709 | /* OUI Type 2 - WMM IE */ | |
710 | if (pos[4] == 0) { | |
711 | elems->wmm_info = pos; | |
712 | elems->wmm_info_len = elen; | |
713 | } else if (pos[4] == 1) { | |
714 | elems->wmm_param = pos; | |
715 | elems->wmm_param_len = elen; | |
716 | } | |
717 | } | |
718 | } | |
719 | break; | |
720 | case WLAN_EID_RSN: | |
721 | elems->rsn = pos; | |
722 | elems->rsn_len = elen; | |
723 | break; | |
724 | case WLAN_EID_ERP_INFO: | |
725 | elems->erp_info = pos; | |
726 | elems->erp_info_len = elen; | |
727 | break; | |
728 | case WLAN_EID_EXT_SUPP_RATES: | |
729 | elems->ext_supp_rates = pos; | |
730 | elems->ext_supp_rates_len = elen; | |
731 | break; | |
732 | case WLAN_EID_HT_CAPABILITY: | |
733 | if (elen >= sizeof(struct ieee80211_ht_cap)) | |
734 | elems->ht_cap_elem = (void *)pos; | |
fcff4f10 PS |
735 | else |
736 | elem_parse_failed = true; | |
dd76986b | 737 | break; |
074d46d1 JB |
738 | case WLAN_EID_HT_OPERATION: |
739 | if (elen >= sizeof(struct ieee80211_ht_operation)) | |
740 | elems->ht_operation = (void *)pos; | |
fcff4f10 PS |
741 | else |
742 | elem_parse_failed = true; | |
dd76986b JB |
743 | break; |
744 | case WLAN_EID_MESH_ID: | |
745 | elems->mesh_id = pos; | |
746 | elems->mesh_id_len = elen; | |
747 | break; | |
748 | case WLAN_EID_MESH_CONFIG: | |
749 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) | |
750 | elems->mesh_config = (void *)pos; | |
fcff4f10 PS |
751 | else |
752 | elem_parse_failed = true; | |
dd76986b JB |
753 | break; |
754 | case WLAN_EID_PEER_MGMT: | |
755 | elems->peering = pos; | |
756 | elems->peering_len = elen; | |
757 | break; | |
758 | case WLAN_EID_PREQ: | |
759 | elems->preq = pos; | |
760 | elems->preq_len = elen; | |
761 | break; | |
762 | case WLAN_EID_PREP: | |
763 | elems->prep = pos; | |
764 | elems->prep_len = elen; | |
765 | break; | |
766 | case WLAN_EID_PERR: | |
767 | elems->perr = pos; | |
768 | elems->perr_len = elen; | |
769 | break; | |
770 | case WLAN_EID_RANN: | |
771 | if (elen >= sizeof(struct ieee80211_rann_ie)) | |
772 | elems->rann = (void *)pos; | |
fcff4f10 PS |
773 | else |
774 | elem_parse_failed = true; | |
dd76986b JB |
775 | break; |
776 | case WLAN_EID_CHANNEL_SWITCH: | |
5bc1420b JB |
777 | if (elen != sizeof(struct ieee80211_channel_sw_ie)) { |
778 | elem_parse_failed = true; | |
779 | break; | |
780 | } | |
781 | elems->ch_switch_ie = (void *)pos; | |
dd76986b JB |
782 | break; |
783 | case WLAN_EID_QUIET: | |
784 | if (!elems->quiet_elem) { | |
785 | elems->quiet_elem = pos; | |
786 | elems->quiet_elem_len = elen; | |
787 | } | |
788 | elems->num_of_quiet_elem++; | |
789 | break; | |
790 | case WLAN_EID_COUNTRY: | |
791 | elems->country_elem = pos; | |
792 | elems->country_elem_len = elen; | |
793 | break; | |
794 | case WLAN_EID_PWR_CONSTRAINT: | |
795 | elems->pwr_constr_elem = pos; | |
796 | elems->pwr_constr_elem_len = elen; | |
797 | break; | |
798 | case WLAN_EID_TIMEOUT_INTERVAL: | |
799 | elems->timeout_int = pos; | |
800 | elems->timeout_int_len = elen; | |
801 | break; | |
802 | default: | |
803 | break; | |
804 | } | |
805 | ||
fcff4f10 PS |
806 | if (elem_parse_failed) |
807 | elems->parse_error = true; | |
808 | else | |
809 | set_bit(id, seen_elems); | |
810 | ||
dd76986b JB |
811 | left -= elen; |
812 | pos += elen; | |
813 | } | |
814 | ||
fcff4f10 PS |
815 | if (left != 0) |
816 | elems->parse_error = true; | |
817 | ||
dd76986b JB |
818 | return crc; |
819 | } | |
820 | ||
37ffc8da JB |
821 | void ieee802_11_parse_elems(u8 *start, size_t len, |
822 | struct ieee802_11_elems *elems) | |
d91f36db JB |
823 | { |
824 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
825 | } | |
826 | ||
3abead59 JB |
827 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, |
828 | bool bss_notify) | |
5825fe10 JB |
829 | { |
830 | struct ieee80211_local *local = sdata->local; | |
831 | struct ieee80211_tx_queue_params qparam; | |
54bcbc69 | 832 | int ac; |
a8ce8544 | 833 | bool use_11b, enable_qos; |
aa837e1d | 834 | int aCWmin, aCWmax; |
5825fe10 JB |
835 | |
836 | if (!local->ops->conf_tx) | |
837 | return; | |
838 | ||
54bcbc69 JB |
839 | if (local->hw.queues < IEEE80211_NUM_ACS) |
840 | return; | |
841 | ||
5825fe10 JB |
842 | memset(&qparam, 0, sizeof(qparam)); |
843 | ||
679ef4ea | 844 | use_11b = (local->oper_channel->band == IEEE80211_BAND_2GHZ) && |
aa837e1d | 845 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); |
5825fe10 | 846 | |
a8ce8544 SG |
847 | /* |
848 | * By default disable QoS in STA mode for old access points, which do | |
849 | * not support 802.11e. New APs will provide proper queue parameters, | |
850 | * that we will configure later. | |
851 | */ | |
852 | enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); | |
853 | ||
54bcbc69 | 854 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
aa837e1d JB |
855 | /* Set defaults according to 802.11-2007 Table 7-37 */ |
856 | aCWmax = 1023; | |
857 | if (use_11b) | |
858 | aCWmin = 31; | |
859 | else | |
860 | aCWmin = 15; | |
861 | ||
a8ce8544 SG |
862 | if (enable_qos) { |
863 | switch (ac) { | |
864 | case IEEE80211_AC_BK: | |
865 | qparam.cw_max = aCWmax; | |
866 | qparam.cw_min = aCWmin; | |
867 | qparam.txop = 0; | |
868 | qparam.aifs = 7; | |
869 | break; | |
870 | /* never happens but let's not leave undefined */ | |
871 | default: | |
872 | case IEEE80211_AC_BE: | |
873 | qparam.cw_max = aCWmax; | |
874 | qparam.cw_min = aCWmin; | |
875 | qparam.txop = 0; | |
876 | qparam.aifs = 3; | |
877 | break; | |
878 | case IEEE80211_AC_VI: | |
879 | qparam.cw_max = aCWmin; | |
880 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
881 | if (use_11b) | |
882 | qparam.txop = 6016/32; | |
883 | else | |
884 | qparam.txop = 3008/32; | |
885 | qparam.aifs = 2; | |
886 | break; | |
887 | case IEEE80211_AC_VO: | |
888 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
889 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
890 | if (use_11b) | |
891 | qparam.txop = 3264/32; | |
892 | else | |
893 | qparam.txop = 1504/32; | |
894 | qparam.aifs = 2; | |
895 | break; | |
896 | } | |
897 | } else { | |
898 | /* Confiure old 802.11b/g medium access rules. */ | |
7ba10a8e JB |
899 | qparam.cw_max = aCWmax; |
900 | qparam.cw_min = aCWmin; | |
aa837e1d | 901 | qparam.txop = 0; |
aa837e1d | 902 | qparam.aifs = 2; |
aa837e1d | 903 | } |
5825fe10 | 904 | |
ab13315a KV |
905 | qparam.uapsd = false; |
906 | ||
54bcbc69 JB |
907 | sdata->tx_conf[ac] = qparam; |
908 | drv_conf_tx(local, sdata, ac, &qparam); | |
aa837e1d | 909 | } |
e1b3ec1a | 910 | |
f142c6b9 JB |
911 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR && |
912 | sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { | |
a8ce8544 | 913 | sdata->vif.bss_conf.qos = enable_qos; |
3abead59 JB |
914 | if (bss_notify) |
915 | ieee80211_bss_info_change_notify(sdata, | |
916 | BSS_CHANGED_QOS); | |
d9734979 | 917 | } |
5825fe10 | 918 | } |
e50db65c | 919 | |
46900298 JB |
920 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
921 | const size_t supp_rates_len, | |
922 | const u8 *supp_rates) | |
923 | { | |
924 | struct ieee80211_local *local = sdata->local; | |
925 | int i, have_higher_than_11mbit = 0; | |
926 | ||
927 | /* cf. IEEE 802.11 9.2.12 */ | |
928 | for (i = 0; i < supp_rates_len; i++) | |
929 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
930 | have_higher_than_11mbit = 1; | |
931 | ||
679ef4ea | 932 | if (local->oper_channel->band == IEEE80211_BAND_2GHZ && |
46900298 JB |
933 | have_higher_than_11mbit) |
934 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
935 | else | |
936 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
937 | ||
3abead59 | 938 | ieee80211_set_wmm_default(sdata, true); |
46900298 JB |
939 | } |
940 | ||
881d948c | 941 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
942 | enum ieee80211_band band) |
943 | { | |
944 | struct ieee80211_supported_band *sband; | |
945 | struct ieee80211_rate *bitrates; | |
881d948c | 946 | u32 mandatory_rates; |
96dd22ac JB |
947 | enum ieee80211_rate_flags mandatory_flag; |
948 | int i; | |
949 | ||
950 | sband = local->hw.wiphy->bands[band]; | |
4ee73f33 MK |
951 | if (WARN_ON(!sband)) |
952 | return 1; | |
96dd22ac JB |
953 | |
954 | if (band == IEEE80211_BAND_2GHZ) | |
955 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
956 | else | |
957 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
958 | ||
959 | bitrates = sband->bitrates; | |
960 | mandatory_rates = 0; | |
961 | for (i = 0; i < sband->n_bitrates; i++) | |
962 | if (bitrates[i].flags & mandatory_flag) | |
963 | mandatory_rates |= BIT(i); | |
964 | return mandatory_rates; | |
965 | } | |
46900298 JB |
966 | |
967 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
968 | u16 transaction, u16 auth_alg, | |
efa6a09d AQ |
969 | u8 *extra, size_t extra_len, const u8 *da, |
970 | const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx) | |
46900298 JB |
971 | { |
972 | struct ieee80211_local *local = sdata->local; | |
973 | struct sk_buff *skb; | |
974 | struct ieee80211_mgmt *mgmt; | |
fffd0934 | 975 | int err; |
46900298 JB |
976 | |
977 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 978 | sizeof(*mgmt) + 6 + extra_len); |
d15b8459 | 979 | if (!skb) |
46900298 | 980 | return; |
d15b8459 | 981 | |
46900298 JB |
982 | skb_reserve(skb, local->hw.extra_tx_headroom); |
983 | ||
984 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
985 | memset(mgmt, 0, 24 + 6); | |
986 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
987 | IEEE80211_STYPE_AUTH); | |
efa6a09d | 988 | memcpy(mgmt->da, da, ETH_ALEN); |
47846c9b | 989 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
990 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
991 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
992 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
993 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
994 | if (extra) | |
995 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 996 | |
fffd0934 JB |
997 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
998 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
999 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
1000 | WARN_ON(err); | |
1001 | } | |
1002 | ||
62ae67be JB |
1003 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1004 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
1005 | } |
1006 | ||
de95a54b | 1007 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 1008 | const u8 *ie, size_t ie_len, |
651b5225 JM |
1009 | enum ieee80211_band band, u32 rate_mask, |
1010 | u8 channel) | |
de95a54b JB |
1011 | { |
1012 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
1013 | u8 *pos; |
1014 | size_t offset = 0, noffset; | |
1015 | int supp_rates_len, i; | |
8dcb2003 JM |
1016 | u8 rates[32]; |
1017 | int num_rates; | |
1018 | int ext_rates_len; | |
de95a54b | 1019 | |
4d36ec58 | 1020 | sband = local->hw.wiphy->bands[band]; |
d811b3d5 AN |
1021 | if (WARN_ON_ONCE(!sband)) |
1022 | return 0; | |
de95a54b JB |
1023 | |
1024 | pos = buffer; | |
1025 | ||
8dcb2003 JM |
1026 | num_rates = 0; |
1027 | for (i = 0; i < sband->n_bitrates; i++) { | |
1028 | if ((BIT(i) & rate_mask) == 0) | |
1029 | continue; /* skip rate */ | |
1030 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
1031 | } | |
1032 | ||
1033 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 1034 | |
de95a54b | 1035 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 1036 | *pos++ = supp_rates_len; |
8dcb2003 JM |
1037 | memcpy(pos, rates, supp_rates_len); |
1038 | pos += supp_rates_len; | |
8e664fb3 JB |
1039 | |
1040 | /* insert "request information" if in custom IEs */ | |
1041 | if (ie && ie_len) { | |
1042 | static const u8 before_extrates[] = { | |
1043 | WLAN_EID_SSID, | |
1044 | WLAN_EID_SUPP_RATES, | |
1045 | WLAN_EID_REQUEST, | |
1046 | }; | |
1047 | noffset = ieee80211_ie_split(ie, ie_len, | |
1048 | before_extrates, | |
1049 | ARRAY_SIZE(before_extrates), | |
1050 | offset); | |
1051 | memcpy(pos, ie + offset, noffset - offset); | |
1052 | pos += noffset - offset; | |
1053 | offset = noffset; | |
1054 | } | |
1055 | ||
8dcb2003 JM |
1056 | ext_rates_len = num_rates - supp_rates_len; |
1057 | if (ext_rates_len > 0) { | |
8e664fb3 | 1058 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
1059 | *pos++ = ext_rates_len; |
1060 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
1061 | pos += ext_rates_len; | |
8e664fb3 JB |
1062 | } |
1063 | ||
651b5225 JM |
1064 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
1065 | *pos++ = WLAN_EID_DS_PARAMS; | |
1066 | *pos++ = 1; | |
1067 | *pos++ = channel; | |
1068 | } | |
1069 | ||
8e664fb3 JB |
1070 | /* insert custom IEs that go before HT */ |
1071 | if (ie && ie_len) { | |
1072 | static const u8 before_ht[] = { | |
1073 | WLAN_EID_SSID, | |
1074 | WLAN_EID_SUPP_RATES, | |
1075 | WLAN_EID_REQUEST, | |
1076 | WLAN_EID_EXT_SUPP_RATES, | |
1077 | WLAN_EID_DS_PARAMS, | |
1078 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
1079 | }; | |
1080 | noffset = ieee80211_ie_split(ie, ie_len, | |
1081 | before_ht, ARRAY_SIZE(before_ht), | |
1082 | offset); | |
1083 | memcpy(pos, ie + offset, noffset - offset); | |
1084 | pos += noffset - offset; | |
1085 | offset = noffset; | |
de95a54b JB |
1086 | } |
1087 | ||
42e7aa77 | 1088 | if (sband->ht_cap.ht_supported) |
ef96a842 BG |
1089 | pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, |
1090 | sband->ht_cap.cap); | |
5ef2d41a | 1091 | |
de95a54b JB |
1092 | /* |
1093 | * If adding more here, adjust code in main.c | |
1094 | * that calculates local->scan_ies_len. | |
1095 | */ | |
1096 | ||
8e664fb3 JB |
1097 | /* add any remaining custom IEs */ |
1098 | if (ie && ie_len) { | |
1099 | noffset = ie_len; | |
1100 | memcpy(pos, ie + offset, noffset - offset); | |
1101 | pos += noffset - offset; | |
de95a54b JB |
1102 | } |
1103 | ||
ba0afa2f MP |
1104 | if (sband->vht_cap.vht_supported) |
1105 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
1106 | sband->vht_cap.cap); | |
1107 | ||
de95a54b JB |
1108 | return pos - buffer; |
1109 | } | |
1110 | ||
a619a4c0 | 1111 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
85a237fe | 1112 | u8 *dst, u32 ratemask, |
6b77863b | 1113 | struct ieee80211_channel *chan, |
a619a4c0 | 1114 | const u8 *ssid, size_t ssid_len, |
a806c558 PS |
1115 | const u8 *ie, size_t ie_len, |
1116 | bool directed) | |
46900298 JB |
1117 | { |
1118 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
1119 | struct sk_buff *skb; |
1120 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
1121 | size_t buf_len; |
1122 | u8 *buf; | |
6b77863b | 1123 | u8 chan_no; |
7c12ce8b KV |
1124 | |
1125 | /* FIXME: come up with a proper value */ | |
1126 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
d15b8459 | 1127 | if (!buf) |
a619a4c0 | 1128 | return NULL; |
46900298 | 1129 | |
a806c558 PS |
1130 | /* |
1131 | * Do not send DS Channel parameter for directed probe requests | |
1132 | * in order to maximize the chance that we get a response. Some | |
1133 | * badly-behaved APs don't respond when this parameter is included. | |
1134 | */ | |
1135 | if (directed) | |
6b77863b | 1136 | chan_no = 0; |
a806c558 | 1137 | else |
6b77863b | 1138 | chan_no = ieee80211_frequency_to_channel(chan->center_freq); |
651b5225 | 1139 | |
6b77863b JB |
1140 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band, |
1141 | ratemask, chan_no); | |
7c12ce8b KV |
1142 | |
1143 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
1144 | ssid, ssid_len, | |
1145 | buf, buf_len); | |
5b2bbf75 JB |
1146 | if (!skb) |
1147 | goto out; | |
7c12ce8b | 1148 | |
46900298 | 1149 | if (dst) { |
7c12ce8b | 1150 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
1151 | memcpy(mgmt->da, dst, ETH_ALEN); |
1152 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 1153 | } |
46900298 | 1154 | |
62ae67be | 1155 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5b2bbf75 JB |
1156 | |
1157 | out: | |
145b6d1a | 1158 | kfree(buf); |
a619a4c0 JO |
1159 | |
1160 | return skb; | |
1161 | } | |
1162 | ||
1163 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
1164 | const u8 *ssid, size_t ssid_len, | |
a806c558 | 1165 | const u8 *ie, size_t ie_len, |
fe94fe05 JB |
1166 | u32 ratemask, bool directed, bool no_cck, |
1167 | struct ieee80211_channel *channel) | |
a619a4c0 JO |
1168 | { |
1169 | struct sk_buff *skb; | |
1170 | ||
fe94fe05 | 1171 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel, |
6b77863b | 1172 | ssid, ssid_len, |
85a237fe | 1173 | ie, ie_len, directed); |
aad14ceb RM |
1174 | if (skb) { |
1175 | if (no_cck) | |
1176 | IEEE80211_SKB_CB(skb)->flags |= | |
1177 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
a619a4c0 | 1178 | ieee80211_tx_skb(sdata, skb); |
aad14ceb | 1179 | } |
46900298 JB |
1180 | } |
1181 | ||
1182 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
1183 | struct ieee802_11_elems *elems, | |
9ebb61a2 | 1184 | enum ieee80211_band band, u32 *basic_rates) |
46900298 JB |
1185 | { |
1186 | struct ieee80211_supported_band *sband; | |
1187 | struct ieee80211_rate *bitrates; | |
1188 | size_t num_rates; | |
1189 | u32 supp_rates; | |
1190 | int i, j; | |
1191 | sband = local->hw.wiphy->bands[band]; | |
1192 | ||
4ee73f33 MK |
1193 | if (WARN_ON(!sband)) |
1194 | return 1; | |
46900298 JB |
1195 | |
1196 | bitrates = sband->bitrates; | |
1197 | num_rates = sband->n_bitrates; | |
1198 | supp_rates = 0; | |
1199 | for (i = 0; i < elems->supp_rates_len + | |
1200 | elems->ext_supp_rates_len; i++) { | |
1201 | u8 rate = 0; | |
1202 | int own_rate; | |
9ebb61a2 | 1203 | bool is_basic; |
46900298 JB |
1204 | if (i < elems->supp_rates_len) |
1205 | rate = elems->supp_rates[i]; | |
1206 | else if (elems->ext_supp_rates) | |
1207 | rate = elems->ext_supp_rates | |
1208 | [i - elems->supp_rates_len]; | |
1209 | own_rate = 5 * (rate & 0x7f); | |
9ebb61a2 AN |
1210 | is_basic = !!(rate & 0x80); |
1211 | ||
1212 | if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1213 | continue; | |
1214 | ||
1215 | for (j = 0; j < num_rates; j++) { | |
1216 | if (bitrates[j].bitrate == own_rate) { | |
46900298 | 1217 | supp_rates |= BIT(j); |
9ebb61a2 AN |
1218 | if (basic_rates && is_basic) |
1219 | *basic_rates |= BIT(j); | |
1220 | } | |
1221 | } | |
46900298 JB |
1222 | } |
1223 | return supp_rates; | |
1224 | } | |
f2753ddb | 1225 | |
84f6a01c JB |
1226 | void ieee80211_stop_device(struct ieee80211_local *local) |
1227 | { | |
1228 | ieee80211_led_radio(local, false); | |
67408c8c | 1229 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
84f6a01c JB |
1230 | |
1231 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
1232 | |
1233 | flush_workqueue(local->workqueue); | |
678f415f | 1234 | drv_stop(local); |
84f6a01c JB |
1235 | } |
1236 | ||
f2753ddb JB |
1237 | int ieee80211_reconfig(struct ieee80211_local *local) |
1238 | { | |
1239 | struct ieee80211_hw *hw = &local->hw; | |
1240 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 1241 | struct sta_info *sta; |
2683d65b | 1242 | int res, i; |
5bb644a0 | 1243 | |
eecc4800 | 1244 | #ifdef CONFIG_PM |
ceb99fe0 JB |
1245 | if (local->suspended) |
1246 | local->resuming = true; | |
f2753ddb | 1247 | |
eecc4800 JB |
1248 | if (local->wowlan) { |
1249 | local->wowlan = false; | |
1250 | res = drv_resume(local); | |
1251 | if (res < 0) { | |
1252 | local->resuming = false; | |
1253 | return res; | |
1254 | } | |
1255 | if (res == 0) | |
1256 | goto wake_up; | |
1257 | WARN_ON(res > 1); | |
1258 | /* | |
1259 | * res is 1, which means the driver requested | |
1260 | * to go through a regular reset on wakeup. | |
1261 | */ | |
1262 | } | |
1263 | #endif | |
94f9b97b JB |
1264 | /* everything else happens only if HW was up & running */ |
1265 | if (!local->open_count) | |
1266 | goto wake_up; | |
f2753ddb | 1267 | |
94f9b97b JB |
1268 | /* |
1269 | * Upon resume hardware can sometimes be goofy due to | |
1270 | * various platform / driver / bus issues, so restarting | |
1271 | * the device may at times not work immediately. Propagate | |
1272 | * the error. | |
1273 | */ | |
1274 | res = drv_start(local); | |
1275 | if (res) { | |
1276 | WARN(local->suspended, "Hardware became unavailable " | |
1277 | "upon resume. This could be a software issue " | |
1278 | "prior to suspend or a hardware issue.\n"); | |
1279 | return res; | |
f2753ddb JB |
1280 | } |
1281 | ||
7f281975 YAP |
1282 | /* setup fragmentation threshold */ |
1283 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
1284 | ||
1285 | /* setup RTS threshold */ | |
1286 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
1287 | ||
1288 | /* reset coverage class */ | |
1289 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
1290 | ||
94f9b97b JB |
1291 | ieee80211_led_radio(local, true); |
1292 | ieee80211_mod_tpt_led_trig(local, | |
1293 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1294 | ||
f2753ddb | 1295 | /* add interfaces */ |
4b6f1dd6 JB |
1296 | sdata = rtnl_dereference(local->monitor_sdata); |
1297 | if (sdata) { | |
1298 | res = drv_add_interface(local, sdata); | |
1299 | if (WARN_ON(res)) { | |
1300 | rcu_assign_pointer(local->monitor_sdata, NULL); | |
1301 | synchronize_net(); | |
1302 | kfree(sdata); | |
1303 | } | |
1304 | } | |
1305 | ||
f2753ddb JB |
1306 | list_for_each_entry(sdata, &local->interfaces, list) { |
1307 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1308 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f | 1309 | ieee80211_sdata_running(sdata)) |
7b7eab6f | 1310 | res = drv_add_interface(local, sdata); |
f2753ddb JB |
1311 | } |
1312 | ||
1313 | /* add STAs back */ | |
34e89507 JB |
1314 | mutex_lock(&local->sta_mtx); |
1315 | list_for_each_entry(sta, &local->sta_list, list) { | |
2e8d397e | 1316 | enum ieee80211_sta_state state; |
f09603a2 | 1317 | |
2e8d397e AN |
1318 | if (!sta->uploaded) |
1319 | continue; | |
1320 | ||
1321 | /* AP-mode stations will be added later */ | |
1322 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1323 | continue; | |
1324 | ||
1325 | for (state = IEEE80211_STA_NOTEXIST; | |
1326 | state < sta->sta_state; state++) | |
1327 | WARN_ON(drv_sta_state(local, sta->sdata, sta, state, | |
1328 | state + 1)); | |
f2753ddb | 1329 | } |
34e89507 | 1330 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1331 | |
2683d65b | 1332 | /* reconfigure tx conf */ |
54bcbc69 JB |
1333 | if (hw->queues >= IEEE80211_NUM_ACS) { |
1334 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1335 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1336 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1337 | !ieee80211_sdata_running(sdata)) | |
1338 | continue; | |
f6f3def3 | 1339 | |
54bcbc69 JB |
1340 | for (i = 0; i < IEEE80211_NUM_ACS; i++) |
1341 | drv_conf_tx(local, sdata, i, | |
1342 | &sdata->tx_conf[i]); | |
1343 | } | |
f6f3def3 | 1344 | } |
2683d65b | 1345 | |
f2753ddb JB |
1346 | /* reconfigure hardware */ |
1347 | ieee80211_hw_config(local, ~0); | |
1348 | ||
f2753ddb | 1349 | ieee80211_configure_filter(local); |
f2753ddb JB |
1350 | |
1351 | /* Finally also reconfigure all the BSS information */ | |
1352 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1353 | u32 changed; |
1354 | ||
9607e6b6 | 1355 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1356 | continue; |
ac8dd506 JB |
1357 | |
1358 | /* common change flags for all interface types */ | |
1359 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1360 | BSS_CHANGED_ERP_PREAMBLE | | |
1361 | BSS_CHANGED_ERP_SLOT | | |
1362 | BSS_CHANGED_HT | | |
1363 | BSS_CHANGED_BASIC_RATES | | |
1364 | BSS_CHANGED_BEACON_INT | | |
1365 | BSS_CHANGED_BSSID | | |
4ced3f74 | 1366 | BSS_CHANGED_CQM | |
55de47f6 EP |
1367 | BSS_CHANGED_QOS | |
1368 | BSS_CHANGED_IDLE; | |
ac8dd506 | 1369 | |
f2753ddb JB |
1370 | switch (sdata->vif.type) { |
1371 | case NL80211_IFTYPE_STATION: | |
0d392e93 | 1372 | changed |= BSS_CHANGED_ASSOC | |
ab095877 EP |
1373 | BSS_CHANGED_ARP_FILTER | |
1374 | BSS_CHANGED_PS; | |
a7b545f7 | 1375 | mutex_lock(&sdata->u.mgd.mtx); |
ac8dd506 | 1376 | ieee80211_bss_info_change_notify(sdata, changed); |
a7b545f7 | 1377 | mutex_unlock(&sdata->u.mgd.mtx); |
ac8dd506 | 1378 | break; |
f2753ddb | 1379 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1380 | changed |= BSS_CHANGED_IBSS; |
1381 | /* fall through */ | |
f2753ddb | 1382 | case NL80211_IFTYPE_AP: |
e7979ac7 AN |
1383 | changed |= BSS_CHANGED_SSID; |
1384 | ||
1385 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1386 | changed |= BSS_CHANGED_AP_PROBE_RESP; | |
1387 | ||
7827493b | 1388 | /* fall through */ |
f2753ddb | 1389 | case NL80211_IFTYPE_MESH_POINT: |
ac8dd506 JB |
1390 | changed |= BSS_CHANGED_BEACON | |
1391 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1392 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1393 | break; |
1394 | case NL80211_IFTYPE_WDS: | |
1395 | break; | |
1396 | case NL80211_IFTYPE_AP_VLAN: | |
1397 | case NL80211_IFTYPE_MONITOR: | |
1398 | /* ignore virtual */ | |
1399 | break; | |
98104fde | 1400 | case NL80211_IFTYPE_P2P_DEVICE: |
f142c6b9 JB |
1401 | changed = BSS_CHANGED_IDLE; |
1402 | break; | |
f2753ddb | 1403 | case NL80211_IFTYPE_UNSPECIFIED: |
2e161f78 | 1404 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1405 | case NL80211_IFTYPE_P2P_CLIENT: |
1406 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1407 | WARN_ON(1); |
1408 | break; | |
1409 | } | |
1410 | } | |
1411 | ||
8e1b23b9 ES |
1412 | ieee80211_recalc_ps(local, -1); |
1413 | ||
6e1b1b24 EP |
1414 | /* |
1415 | * The sta might be in psm against the ap (e.g. because | |
1416 | * this was the state before a hw restart), so we | |
1417 | * explicitly send a null packet in order to make sure | |
1418 | * it'll sync against the ap (and get out of psm). | |
1419 | */ | |
1420 | if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { | |
1421 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1422 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1423 | continue; | |
1424 | ||
1425 | ieee80211_send_nullfunc(local, sdata, 0); | |
1426 | } | |
1427 | } | |
1428 | ||
2e8d397e AN |
1429 | /* APs are now beaconing, add back stations */ |
1430 | mutex_lock(&local->sta_mtx); | |
1431 | list_for_each_entry(sta, &local->sta_list, list) { | |
1432 | enum ieee80211_sta_state state; | |
1433 | ||
1434 | if (!sta->uploaded) | |
1435 | continue; | |
1436 | ||
1437 | if (sta->sdata->vif.type != NL80211_IFTYPE_AP) | |
1438 | continue; | |
1439 | ||
1440 | for (state = IEEE80211_STA_NOTEXIST; | |
1441 | state < sta->sta_state; state++) | |
1442 | WARN_ON(drv_sta_state(local, sta->sdata, sta, state, | |
1443 | state + 1)); | |
1444 | } | |
1445 | mutex_unlock(&local->sta_mtx); | |
1446 | ||
7b21aea0 ES |
1447 | /* add back keys */ |
1448 | list_for_each_entry(sdata, &local->interfaces, list) | |
1449 | if (ieee80211_sdata_running(sdata)) | |
1450 | ieee80211_enable_keys(sdata); | |
1451 | ||
c6209488 | 1452 | wake_up: |
04800ada AN |
1453 | local->in_reconfig = false; |
1454 | barrier(); | |
1455 | ||
2a419056 JB |
1456 | /* |
1457 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1458 | * sessions can be established after a resume. | |
1459 | * | |
1460 | * Also tear down aggregation sessions since reconfiguring | |
1461 | * them in a hardware restart scenario is not easily done | |
1462 | * right now, and the hardware will have lost information | |
1463 | * about the sessions, but we and the AP still think they | |
1464 | * are active. This is really a workaround though. | |
1465 | */ | |
74e2bd1f | 1466 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1467 | mutex_lock(&local->sta_mtx); |
1468 | ||
1469 | list_for_each_entry(sta, &local->sta_list, list) { | |
53f73c09 | 1470 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
c2c98fde | 1471 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1472 | } |
2a419056 JB |
1473 | |
1474 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1475 | } |
74e2bd1f | 1476 | |
f2753ddb JB |
1477 | ieee80211_wake_queues_by_reason(hw, |
1478 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1479 | ||
5bb644a0 JB |
1480 | /* |
1481 | * If this is for hw restart things are still running. | |
1482 | * We may want to change that later, however. | |
1483 | */ | |
ceb99fe0 | 1484 | if (!local->suspended) |
5bb644a0 JB |
1485 | return 0; |
1486 | ||
1487 | #ifdef CONFIG_PM | |
ceb99fe0 | 1488 | /* first set suspended false, then resuming */ |
5bb644a0 | 1489 | local->suspended = false; |
ceb99fe0 JB |
1490 | mb(); |
1491 | local->resuming = false; | |
5bb644a0 JB |
1492 | |
1493 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1494 | switch(sdata->vif.type) { | |
1495 | case NL80211_IFTYPE_STATION: | |
1496 | ieee80211_sta_restart(sdata); | |
1497 | break; | |
1498 | case NL80211_IFTYPE_ADHOC: | |
1499 | ieee80211_ibss_restart(sdata); | |
1500 | break; | |
1501 | case NL80211_IFTYPE_MESH_POINT: | |
1502 | ieee80211_mesh_restart(sdata); | |
1503 | break; | |
1504 | default: | |
1505 | break; | |
1506 | } | |
1507 | } | |
1508 | ||
26d59535 | 1509 | mod_timer(&local->sta_cleanup, jiffies + 1); |
5bb644a0 | 1510 | |
34e89507 | 1511 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1512 | list_for_each_entry(sta, &local->sta_list, list) |
1513 | mesh_plink_restart(sta); | |
34e89507 | 1514 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1515 | #else |
1516 | WARN_ON(1); | |
1517 | #endif | |
f2753ddb JB |
1518 | return 0; |
1519 | } | |
42935eca | 1520 | |
95acac61 JB |
1521 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
1522 | { | |
1523 | struct ieee80211_sub_if_data *sdata; | |
1524 | struct ieee80211_local *local; | |
1525 | struct ieee80211_key *key; | |
1526 | ||
1527 | if (WARN_ON(!vif)) | |
1528 | return; | |
1529 | ||
1530 | sdata = vif_to_sdata(vif); | |
1531 | local = sdata->local; | |
1532 | ||
1533 | if (WARN_ON(!local->resuming)) | |
1534 | return; | |
1535 | ||
1536 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1537 | return; | |
1538 | ||
1539 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1540 | ||
1541 | mutex_lock(&local->key_mtx); | |
1542 | list_for_each_entry(key, &sdata->key_list, list) | |
1543 | key->flags |= KEY_FLAG_TAINTED; | |
1544 | mutex_unlock(&local->key_mtx); | |
1545 | } | |
1546 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1547 | ||
0f78231b JB |
1548 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1549 | enum ieee80211_smps_mode *smps_mode) | |
1550 | { | |
1551 | if (ifmgd->associated) { | |
1552 | *smps_mode = ifmgd->ap_smps; | |
1553 | ||
1554 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1555 | if (ifmgd->powersave) | |
1556 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1557 | else | |
1558 | *smps_mode = IEEE80211_SMPS_OFF; | |
1559 | } | |
1560 | ||
1561 | return 1; | |
1562 | } | |
1563 | ||
1564 | return 0; | |
1565 | } | |
1566 | ||
1567 | /* must hold iflist_mtx */ | |
025e6be2 | 1568 | void ieee80211_recalc_smps(struct ieee80211_local *local) |
0f78231b JB |
1569 | { |
1570 | struct ieee80211_sub_if_data *sdata; | |
1571 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1572 | int count = 0; | |
1573 | ||
46a5ebaf | 1574 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1575 | |
1576 | /* | |
1577 | * This function could be improved to handle multiple | |
1578 | * interfaces better, but right now it makes any | |
1579 | * non-station interfaces force SM PS to be turned | |
1580 | * off. If there are multiple station interfaces it | |
1581 | * could also use the best possible mode, e.g. if | |
1582 | * one is in static and the other in dynamic then | |
1583 | * dynamic is ok. | |
1584 | */ | |
1585 | ||
1586 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1587 | if (!ieee80211_sdata_running(sdata)) |
0f78231b | 1588 | continue; |
f142c6b9 JB |
1589 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) |
1590 | continue; | |
0f78231b JB |
1591 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
1592 | goto set; | |
025e6be2 JB |
1593 | |
1594 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
0f78231b JB |
1595 | |
1596 | if (count > 1) { | |
1597 | smps_mode = IEEE80211_SMPS_OFF; | |
1598 | break; | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | if (smps_mode == local->smps_mode) | |
1603 | return; | |
1604 | ||
1605 | set: | |
1606 | local->smps_mode = smps_mode; | |
1607 | /* changed flag is auto-detected for this */ | |
1608 | ieee80211_hw_config(local, 0); | |
1609 | } | |
8e664fb3 JB |
1610 | |
1611 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1612 | { | |
1613 | int i; | |
1614 | ||
1615 | for (i = 0; i < n_ids; i++) | |
1616 | if (ids[i] == id) | |
1617 | return true; | |
1618 | return false; | |
1619 | } | |
1620 | ||
1621 | /** | |
1622 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1623 | * | |
1624 | * @ies: the IE buffer | |
1625 | * @ielen: the length of the IE buffer | |
1626 | * @ids: an array with element IDs that are allowed before | |
1627 | * the split | |
1628 | * @n_ids: the size of the element ID array | |
1629 | * @offset: offset where to start splitting in the buffer | |
1630 | * | |
1631 | * This function splits an IE buffer by updating the @offset | |
1632 | * variable to point to the location where the buffer should be | |
1633 | * split. | |
1634 | * | |
1635 | * It assumes that the given IE buffer is well-formed, this | |
1636 | * has to be guaranteed by the caller! | |
1637 | * | |
1638 | * It also assumes that the IEs in the buffer are ordered | |
1639 | * correctly, if not the result of using this function will not | |
1640 | * be ordered correctly either, i.e. it does no reordering. | |
1641 | * | |
1642 | * The function returns the offset where the next part of the | |
1643 | * buffer starts, which may be @ielen if the entire (remainder) | |
1644 | * of the buffer should be used. | |
1645 | */ | |
1646 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1647 | const u8 *ids, int n_ids, size_t offset) | |
1648 | { | |
1649 | size_t pos = offset; | |
1650 | ||
1651 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1652 | pos += 2 + ies[pos + 1]; | |
1653 | ||
1654 | return pos; | |
1655 | } | |
1656 | ||
1657 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1658 | { | |
1659 | size_t pos = offset; | |
1660 | ||
1661 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1662 | pos += 2 + ies[pos + 1]; | |
1663 | ||
1664 | return pos; | |
1665 | } | |
615f7b9b MV |
1666 | |
1667 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1668 | int rssi_min_thold, | |
1669 | int rssi_max_thold) | |
1670 | { | |
1671 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1672 | ||
1673 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1674 | return; | |
1675 | ||
1676 | /* | |
1677 | * Scale up threshold values before storing it, as the RSSI averaging | |
1678 | * algorithm uses a scaled up value as well. Change this scaling | |
1679 | * factor if the RSSI averaging algorithm changes. | |
1680 | */ | |
1681 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1682 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1683 | } | |
1684 | ||
1685 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1686 | int rssi_min_thold, | |
1687 | int rssi_max_thold) | |
1688 | { | |
1689 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1690 | ||
1691 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1692 | rssi_min_thold > rssi_max_thold); | |
1693 | ||
1694 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1695 | rssi_max_thold); | |
1696 | } | |
1697 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1698 | ||
1699 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1700 | { | |
1701 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1702 | ||
1703 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1704 | } | |
1705 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); | |
768db343 | 1706 | |
ef96a842 | 1707 | u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
42e7aa77 AS |
1708 | u16 cap) |
1709 | { | |
1710 | __le16 tmp; | |
1711 | ||
1712 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
1713 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
1714 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
1715 | ||
1716 | /* capability flags */ | |
1717 | tmp = cpu_to_le16(cap); | |
1718 | memcpy(pos, &tmp, sizeof(u16)); | |
1719 | pos += sizeof(u16); | |
1720 | ||
1721 | /* AMPDU parameters */ | |
ef96a842 BG |
1722 | *pos++ = ht_cap->ampdu_factor | |
1723 | (ht_cap->ampdu_density << | |
42e7aa77 AS |
1724 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
1725 | ||
1726 | /* MCS set */ | |
ef96a842 BG |
1727 | memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); |
1728 | pos += sizeof(ht_cap->mcs); | |
42e7aa77 AS |
1729 | |
1730 | /* extended capabilities */ | |
1731 | pos += sizeof(__le16); | |
1732 | ||
1733 | /* BF capabilities */ | |
1734 | pos += sizeof(__le32); | |
1735 | ||
1736 | /* antenna selection */ | |
1737 | pos += sizeof(u8); | |
1738 | ||
1739 | return pos; | |
1740 | } | |
1741 | ||
ba0afa2f MP |
1742 | u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, |
1743 | u32 cap) | |
1744 | { | |
1745 | __le32 tmp; | |
1746 | ||
1747 | *pos++ = WLAN_EID_VHT_CAPABILITY; | |
1748 | *pos++ = sizeof(struct ieee80211_vht_capabilities); | |
1749 | memset(pos, 0, sizeof(struct ieee80211_vht_capabilities)); | |
1750 | ||
1751 | /* capability flags */ | |
1752 | tmp = cpu_to_le32(cap); | |
1753 | memcpy(pos, &tmp, sizeof(u32)); | |
1754 | pos += sizeof(u32); | |
1755 | ||
1756 | /* VHT MCS set */ | |
1757 | memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); | |
1758 | pos += sizeof(vht_cap->vht_mcs); | |
1759 | ||
1760 | return pos; | |
1761 | } | |
1762 | ||
074d46d1 | 1763 | u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
42e7aa77 | 1764 | struct ieee80211_channel *channel, |
431e3154 AN |
1765 | enum nl80211_channel_type channel_type, |
1766 | u16 prot_mode) | |
42e7aa77 | 1767 | { |
074d46d1 | 1768 | struct ieee80211_ht_operation *ht_oper; |
42e7aa77 | 1769 | /* Build HT Information */ |
074d46d1 JB |
1770 | *pos++ = WLAN_EID_HT_OPERATION; |
1771 | *pos++ = sizeof(struct ieee80211_ht_operation); | |
1772 | ht_oper = (struct ieee80211_ht_operation *)pos; | |
1773 | ht_oper->primary_chan = | |
42e7aa77 AS |
1774 | ieee80211_frequency_to_channel(channel->center_freq); |
1775 | switch (channel_type) { | |
1776 | case NL80211_CHAN_HT40MINUS: | |
074d46d1 | 1777 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
42e7aa77 AS |
1778 | break; |
1779 | case NL80211_CHAN_HT40PLUS: | |
074d46d1 | 1780 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
42e7aa77 AS |
1781 | break; |
1782 | case NL80211_CHAN_HT20: | |
1783 | default: | |
074d46d1 | 1784 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; |
42e7aa77 AS |
1785 | break; |
1786 | } | |
aee286c2 TP |
1787 | if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && |
1788 | channel_type != NL80211_CHAN_NO_HT && | |
1789 | channel_type != NL80211_CHAN_HT20) | |
074d46d1 | 1790 | ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; |
ff3cc5f4 | 1791 | |
431e3154 | 1792 | ht_oper->operation_mode = cpu_to_le16(prot_mode); |
074d46d1 | 1793 | ht_oper->stbc_param = 0x0000; |
42e7aa77 AS |
1794 | |
1795 | /* It seems that Basic MCS set and Supported MCS set | |
1796 | are identical for the first 10 bytes */ | |
074d46d1 JB |
1797 | memset(&ht_oper->basic_set, 0, 16); |
1798 | memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); | |
42e7aa77 | 1799 | |
074d46d1 | 1800 | return pos + sizeof(struct ieee80211_ht_operation); |
42e7aa77 AS |
1801 | } |
1802 | ||
1803 | enum nl80211_channel_type | |
074d46d1 | 1804 | ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper) |
42e7aa77 AS |
1805 | { |
1806 | enum nl80211_channel_type channel_type; | |
1807 | ||
074d46d1 | 1808 | if (!ht_oper) |
42e7aa77 AS |
1809 | return NL80211_CHAN_NO_HT; |
1810 | ||
074d46d1 | 1811 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
42e7aa77 AS |
1812 | case IEEE80211_HT_PARAM_CHA_SEC_NONE: |
1813 | channel_type = NL80211_CHAN_HT20; | |
1814 | break; | |
1815 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1816 | channel_type = NL80211_CHAN_HT40PLUS; | |
1817 | break; | |
1818 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1819 | channel_type = NL80211_CHAN_HT40MINUS; | |
1820 | break; | |
1821 | default: | |
1822 | channel_type = NL80211_CHAN_NO_HT; | |
1823 | } | |
1824 | ||
1825 | return channel_type; | |
1826 | } | |
1827 | ||
fc8a7321 | 1828 | int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, |
6b77863b JB |
1829 | struct sk_buff *skb, bool need_basic, |
1830 | enum ieee80211_band band) | |
768db343 | 1831 | { |
768db343 AN |
1832 | struct ieee80211_local *local = sdata->local; |
1833 | struct ieee80211_supported_band *sband; | |
1834 | int rate; | |
1835 | u8 i, rates, *pos; | |
fc8a7321 | 1836 | u32 basic_rates = sdata->vif.bss_conf.basic_rates; |
768db343 | 1837 | |
6b77863b | 1838 | sband = local->hw.wiphy->bands[band]; |
768db343 AN |
1839 | rates = sband->n_bitrates; |
1840 | if (rates > 8) | |
1841 | rates = 8; | |
1842 | ||
1843 | if (skb_tailroom(skb) < rates + 2) | |
1844 | return -ENOMEM; | |
1845 | ||
1846 | pos = skb_put(skb, rates + 2); | |
1847 | *pos++ = WLAN_EID_SUPP_RATES; | |
1848 | *pos++ = rates; | |
1849 | for (i = 0; i < rates; i++) { | |
657c3e0c AN |
1850 | u8 basic = 0; |
1851 | if (need_basic && basic_rates & BIT(i)) | |
1852 | basic = 0x80; | |
768db343 | 1853 | rate = sband->bitrates[i].bitrate; |
657c3e0c | 1854 | *pos++ = basic | (u8) (rate / 5); |
768db343 AN |
1855 | } |
1856 | ||
1857 | return 0; | |
1858 | } | |
1859 | ||
fc8a7321 | 1860 | int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, |
6b77863b JB |
1861 | struct sk_buff *skb, bool need_basic, |
1862 | enum ieee80211_band band) | |
768db343 | 1863 | { |
768db343 AN |
1864 | struct ieee80211_local *local = sdata->local; |
1865 | struct ieee80211_supported_band *sband; | |
1866 | int rate; | |
1867 | u8 i, exrates, *pos; | |
fc8a7321 | 1868 | u32 basic_rates = sdata->vif.bss_conf.basic_rates; |
768db343 | 1869 | |
6b77863b | 1870 | sband = local->hw.wiphy->bands[band]; |
768db343 AN |
1871 | exrates = sband->n_bitrates; |
1872 | if (exrates > 8) | |
1873 | exrates -= 8; | |
1874 | else | |
1875 | exrates = 0; | |
1876 | ||
1877 | if (skb_tailroom(skb) < exrates + 2) | |
1878 | return -ENOMEM; | |
1879 | ||
1880 | if (exrates) { | |
1881 | pos = skb_put(skb, exrates + 2); | |
1882 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1883 | *pos++ = exrates; | |
1884 | for (i = 8; i < sband->n_bitrates; i++) { | |
657c3e0c AN |
1885 | u8 basic = 0; |
1886 | if (need_basic && basic_rates & BIT(i)) | |
1887 | basic = 0x80; | |
768db343 | 1888 | rate = sband->bitrates[i].bitrate; |
657c3e0c | 1889 | *pos++ = basic | (u8) (rate / 5); |
768db343 AN |
1890 | } |
1891 | } | |
1892 | return 0; | |
1893 | } | |
1dae27f8 WYG |
1894 | |
1895 | int ieee80211_ave_rssi(struct ieee80211_vif *vif) | |
1896 | { | |
1897 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1898 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1899 | ||
be6bcabc WYG |
1900 | if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { |
1901 | /* non-managed type inferfaces */ | |
1902 | return 0; | |
1903 | } | |
1dae27f8 WYG |
1904 | return ifmgd->ave_beacon_signal; |
1905 | } | |
0d8a0a17 | 1906 | EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); |