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