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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 | ||
109 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
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 | ||
8318d78a | 123 | if (local->hw.conf.channel->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, | |
8318d78a JB |
165 | size_t frame_len, |
166 | struct ieee80211_rate *rate) | |
c2d1560a JB |
167 | { |
168 | struct ieee80211_local *local = hw_to_local(hw); | |
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 JB |
181 | |
182 | dur = ieee80211_frame_duration(local, 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 | ||
201 | sband = local->hw.wiphy->bands[local->hw.conf.channel->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 */ | |
8318d78a | 216 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
217 | erp, short_preamble); |
218 | /* Data frame duration */ | |
8318d78a | 219 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
220 | erp, short_preamble); |
221 | /* ACK duration */ | |
8318d78a | 222 | dur += ieee80211_frame_duration(local, 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 | ||
242 | sband = local->hw.wiphy->bands[local->hw.conf.channel->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 */ | |
8318d78a | 256 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 257 | erp, short_preamble); |
e039fa4a | 258 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 259 | /* ACK duration */ |
8318d78a | 260 | dur += ieee80211_frame_duration(local, 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 | ||
ce7c9111 KV |
268 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
269 | enum queue_stop_reason reason) | |
c2d1560a JB |
270 | { |
271 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 272 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 273 | |
b5878a2d JB |
274 | trace_wake_queue(local, queue, reason); |
275 | ||
e4e72fb4 JB |
276 | if (WARN_ON(queue >= hw->queues)) |
277 | return; | |
ce7c9111 | 278 | |
ada15125 JB |
279 | if (!test_bit(reason, &local->queue_stop_reasons[queue])) |
280 | return; | |
281 | ||
96f5e66e JB |
282 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
283 | ||
284 | if (local->queue_stop_reasons[queue] != 0) | |
285 | /* someone still has this queue stopped */ | |
286 | return; | |
287 | ||
7236fe29 JB |
288 | if (skb_queue_empty(&local->pending[queue])) { |
289 | rcu_read_lock(); | |
5b714c6a JB |
290 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
291 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
292 | continue; | |
2337db8d | 293 | netif_wake_subqueue(sdata->dev, queue); |
5b714c6a | 294 | } |
7236fe29 JB |
295 | rcu_read_unlock(); |
296 | } else | |
3b8d81e0 | 297 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 298 | } |
ce7c9111 | 299 | |
96f5e66e JB |
300 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
301 | enum queue_stop_reason reason) | |
ce7c9111 KV |
302 | { |
303 | struct ieee80211_local *local = hw_to_local(hw); | |
304 | unsigned long flags; | |
305 | ||
306 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
307 | __ieee80211_wake_queue(hw, queue, reason); | |
308 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
309 | } | |
310 | ||
311 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
312 | { | |
313 | ieee80211_wake_queue_by_reason(hw, queue, | |
314 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
315 | } | |
c2d1560a JB |
316 | EXPORT_SYMBOL(ieee80211_wake_queue); |
317 | ||
ce7c9111 KV |
318 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
319 | enum queue_stop_reason reason) | |
c2d1560a JB |
320 | { |
321 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 322 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 323 | |
b5878a2d JB |
324 | trace_stop_queue(local, queue, reason); |
325 | ||
e4e72fb4 JB |
326 | if (WARN_ON(queue >= hw->queues)) |
327 | return; | |
96f5e66e | 328 | |
ada15125 JB |
329 | if (test_bit(reason, &local->queue_stop_reasons[queue])) |
330 | return; | |
331 | ||
2a577d98 | 332 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 JB |
333 | |
334 | rcu_read_lock(); | |
335 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 336 | netif_stop_subqueue(sdata->dev, queue); |
cf0277e7 | 337 | rcu_read_unlock(); |
c2d1560a | 338 | } |
ce7c9111 | 339 | |
96f5e66e JB |
340 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
341 | enum queue_stop_reason reason) | |
ce7c9111 KV |
342 | { |
343 | struct ieee80211_local *local = hw_to_local(hw); | |
344 | unsigned long flags; | |
345 | ||
346 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
347 | __ieee80211_stop_queue(hw, queue, reason); | |
348 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
349 | } | |
350 | ||
351 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
352 | { | |
353 | ieee80211_stop_queue_by_reason(hw, queue, | |
354 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
355 | } | |
c2d1560a JB |
356 | EXPORT_SYMBOL(ieee80211_stop_queue); |
357 | ||
8f77f384 JB |
358 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
359 | struct sk_buff *skb) | |
360 | { | |
361 | struct ieee80211_hw *hw = &local->hw; | |
362 | unsigned long flags; | |
363 | int queue = skb_get_queue_mapping(skb); | |
a7bc376c JB |
364 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
365 | ||
366 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 367 | kfree_skb(skb); |
a7bc376c JB |
368 | return; |
369 | } | |
8f77f384 JB |
370 | |
371 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
372 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 373 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
374 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
375 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
376 | } | |
377 | ||
b0b97a8a JB |
378 | void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
379 | struct sk_buff_head *skbs, | |
380 | void (*fn)(void *data), void *data) | |
8f77f384 JB |
381 | { |
382 | struct ieee80211_hw *hw = &local->hw; | |
383 | struct sk_buff *skb; | |
384 | unsigned long flags; | |
b0b97a8a | 385 | int queue, i; |
8f77f384 JB |
386 | |
387 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
8f77f384 | 388 | while ((skb = skb_dequeue(skbs))) { |
a7bc376c JB |
389 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
390 | ||
391 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 392 | kfree_skb(skb); |
a7bc376c JB |
393 | continue; |
394 | } | |
395 | ||
8f77f384 | 396 | queue = skb_get_queue_mapping(skb); |
4644ae89 JB |
397 | |
398 | __ieee80211_stop_queue(hw, queue, | |
399 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
400 | ||
3b8d81e0 | 401 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
402 | } |
403 | ||
50a9432d JB |
404 | if (fn) |
405 | fn(data); | |
406 | ||
3b8d81e0 | 407 | for (i = 0; i < hw->queues; i++) |
8f77f384 JB |
408 | __ieee80211_wake_queue(hw, i, |
409 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
8f77f384 | 410 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
8f77f384 JB |
411 | } |
412 | ||
ce7c9111 KV |
413 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
414 | enum queue_stop_reason reason) | |
c2d1560a | 415 | { |
ce7c9111 KV |
416 | struct ieee80211_local *local = hw_to_local(hw); |
417 | unsigned long flags; | |
c2d1560a JB |
418 | int i; |
419 | ||
ce7c9111 KV |
420 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
421 | ||
96f5e66e | 422 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
423 | __ieee80211_stop_queue(hw, i, reason); |
424 | ||
425 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
426 | } | |
427 | ||
428 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
429 | { | |
430 | ieee80211_stop_queues_by_reason(hw, | |
431 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
432 | } |
433 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
434 | ||
92ab8535 TW |
435 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
436 | { | |
437 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
438 | unsigned long flags; |
439 | int ret; | |
96f5e66e | 440 | |
e4e72fb4 JB |
441 | if (WARN_ON(queue >= hw->queues)) |
442 | return true; | |
96f5e66e | 443 | |
3b8d81e0 JB |
444 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
445 | ret = !!local->queue_stop_reasons[queue]; | |
446 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
447 | return ret; | |
92ab8535 TW |
448 | } |
449 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
450 | ||
ce7c9111 KV |
451 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
452 | enum queue_stop_reason reason) | |
c2d1560a | 453 | { |
ce7c9111 KV |
454 | struct ieee80211_local *local = hw_to_local(hw); |
455 | unsigned long flags; | |
c2d1560a JB |
456 | int i; |
457 | ||
ce7c9111 KV |
458 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
459 | ||
e4e72fb4 | 460 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
461 | __ieee80211_wake_queue(hw, i, reason); |
462 | ||
463 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
464 | } | |
465 | ||
466 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
467 | { | |
468 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
469 | } |
470 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 471 | |
32bfd35d JB |
472 | void ieee80211_iterate_active_interfaces( |
473 | struct ieee80211_hw *hw, | |
474 | void (*iterator)(void *data, u8 *mac, | |
475 | struct ieee80211_vif *vif), | |
476 | void *data) | |
dabeb344 JB |
477 | { |
478 | struct ieee80211_local *local = hw_to_local(hw); | |
479 | struct ieee80211_sub_if_data *sdata; | |
480 | ||
c771c9d8 | 481 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
482 | |
483 | list_for_each_entry(sdata, &local->interfaces, list) { | |
484 | switch (sdata->vif.type) { | |
05c914fe JB |
485 | case NL80211_IFTYPE_MONITOR: |
486 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 487 | continue; |
2ca27bcf | 488 | default: |
2f561feb ID |
489 | break; |
490 | } | |
9607e6b6 | 491 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 492 | iterator(data, sdata->vif.addr, |
2f561feb ID |
493 | &sdata->vif); |
494 | } | |
495 | ||
c771c9d8 | 496 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
497 | } |
498 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
499 | ||
500 | void ieee80211_iterate_active_interfaces_atomic( | |
501 | struct ieee80211_hw *hw, | |
502 | void (*iterator)(void *data, u8 *mac, | |
503 | struct ieee80211_vif *vif), | |
504 | void *data) | |
505 | { | |
506 | struct ieee80211_local *local = hw_to_local(hw); | |
507 | struct ieee80211_sub_if_data *sdata; | |
508 | ||
e38bad47 | 509 | rcu_read_lock(); |
dabeb344 | 510 | |
e38bad47 | 511 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 512 | switch (sdata->vif.type) { |
05c914fe JB |
513 | case NL80211_IFTYPE_MONITOR: |
514 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 515 | continue; |
2ca27bcf | 516 | default: |
dabeb344 JB |
517 | break; |
518 | } | |
9607e6b6 | 519 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 520 | iterator(data, sdata->vif.addr, |
32bfd35d | 521 | &sdata->vif); |
dabeb344 | 522 | } |
e38bad47 JB |
523 | |
524 | rcu_read_unlock(); | |
dabeb344 | 525 | } |
2f561feb | 526 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 527 | |
42935eca LR |
528 | /* |
529 | * Nothing should have been stuffed into the workqueue during | |
530 | * the suspend->resume cycle. If this WARN is seen then there | |
531 | * is a bug with either the driver suspend or something in | |
532 | * mac80211 stuffing into the workqueue which we haven't yet | |
533 | * cleared during mac80211's suspend cycle. | |
534 | */ | |
535 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
536 | { | |
ceb99fe0 JB |
537 | if (WARN(local->suspended && !local->resuming, |
538 | "queueing ieee80211 work while going to suspend\n")) | |
539 | return false; | |
42935eca LR |
540 | |
541 | return true; | |
542 | } | |
543 | ||
544 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
545 | { | |
546 | struct ieee80211_local *local = hw_to_local(hw); | |
547 | ||
548 | if (!ieee80211_can_queue_work(local)) | |
549 | return; | |
550 | ||
551 | queue_work(local->workqueue, work); | |
552 | } | |
553 | EXPORT_SYMBOL(ieee80211_queue_work); | |
554 | ||
555 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
556 | struct delayed_work *dwork, | |
557 | unsigned long delay) | |
558 | { | |
559 | struct ieee80211_local *local = hw_to_local(hw); | |
560 | ||
561 | if (!ieee80211_can_queue_work(local)) | |
562 | return; | |
563 | ||
564 | queue_delayed_work(local->workqueue, dwork, delay); | |
565 | } | |
566 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
567 | ||
dd76986b JB |
568 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
569 | struct ieee802_11_elems *elems, | |
570 | u64 filter, u32 crc) | |
571 | { | |
572 | size_t left = len; | |
573 | u8 *pos = start; | |
574 | bool calc_crc = filter != 0; | |
fcff4f10 | 575 | DECLARE_BITMAP(seen_elems, 256); |
dd76986b | 576 | |
fcff4f10 | 577 | bitmap_zero(seen_elems, 256); |
dd76986b JB |
578 | memset(elems, 0, sizeof(*elems)); |
579 | elems->ie_start = start; | |
580 | elems->total_len = len; | |
581 | ||
582 | while (left >= 2) { | |
583 | u8 id, elen; | |
fcff4f10 | 584 | bool elem_parse_failed; |
dd76986b JB |
585 | |
586 | id = *pos++; | |
587 | elen = *pos++; | |
588 | left -= 2; | |
589 | ||
fcff4f10 PS |
590 | if (elen > left) { |
591 | elems->parse_error = true; | |
dd76986b | 592 | break; |
fcff4f10 PS |
593 | } |
594 | ||
595 | if (id != WLAN_EID_VENDOR_SPECIFIC && | |
596 | id != WLAN_EID_QUIET && | |
597 | test_bit(id, seen_elems)) { | |
598 | elems->parse_error = true; | |
599 | left -= elen; | |
600 | pos += elen; | |
601 | continue; | |
602 | } | |
dd76986b JB |
603 | |
604 | if (calc_crc && id < 64 && (filter & (1ULL << id))) | |
605 | crc = crc32_be(crc, pos - 2, elen + 2); | |
606 | ||
fcff4f10 PS |
607 | elem_parse_failed = false; |
608 | ||
dd76986b JB |
609 | switch (id) { |
610 | case WLAN_EID_SSID: | |
611 | elems->ssid = pos; | |
612 | elems->ssid_len = elen; | |
613 | break; | |
614 | case WLAN_EID_SUPP_RATES: | |
615 | elems->supp_rates = pos; | |
616 | elems->supp_rates_len = elen; | |
617 | break; | |
618 | case WLAN_EID_FH_PARAMS: | |
619 | elems->fh_params = pos; | |
620 | elems->fh_params_len = elen; | |
621 | break; | |
622 | case WLAN_EID_DS_PARAMS: | |
623 | elems->ds_params = pos; | |
624 | elems->ds_params_len = elen; | |
625 | break; | |
626 | case WLAN_EID_CF_PARAMS: | |
627 | elems->cf_params = pos; | |
628 | elems->cf_params_len = elen; | |
629 | break; | |
630 | case WLAN_EID_TIM: | |
631 | if (elen >= sizeof(struct ieee80211_tim_ie)) { | |
632 | elems->tim = (void *)pos; | |
633 | elems->tim_len = elen; | |
fcff4f10 PS |
634 | } else |
635 | elem_parse_failed = true; | |
dd76986b JB |
636 | break; |
637 | case WLAN_EID_IBSS_PARAMS: | |
638 | elems->ibss_params = pos; | |
639 | elems->ibss_params_len = elen; | |
640 | break; | |
641 | case WLAN_EID_CHALLENGE: | |
642 | elems->challenge = pos; | |
643 | elems->challenge_len = elen; | |
644 | break; | |
645 | case WLAN_EID_VENDOR_SPECIFIC: | |
646 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
647 | pos[2] == 0xf2) { | |
648 | /* Microsoft OUI (00:50:F2) */ | |
649 | ||
650 | if (calc_crc) | |
651 | crc = crc32_be(crc, pos - 2, elen + 2); | |
652 | ||
653 | if (pos[3] == 1) { | |
654 | /* OUI Type 1 - WPA IE */ | |
655 | elems->wpa = pos; | |
656 | elems->wpa_len = elen; | |
657 | } else if (elen >= 5 && pos[3] == 2) { | |
658 | /* OUI Type 2 - WMM IE */ | |
659 | if (pos[4] == 0) { | |
660 | elems->wmm_info = pos; | |
661 | elems->wmm_info_len = elen; | |
662 | } else if (pos[4] == 1) { | |
663 | elems->wmm_param = pos; | |
664 | elems->wmm_param_len = elen; | |
665 | } | |
666 | } | |
667 | } | |
668 | break; | |
669 | case WLAN_EID_RSN: | |
670 | elems->rsn = pos; | |
671 | elems->rsn_len = elen; | |
672 | break; | |
673 | case WLAN_EID_ERP_INFO: | |
674 | elems->erp_info = pos; | |
675 | elems->erp_info_len = elen; | |
676 | break; | |
677 | case WLAN_EID_EXT_SUPP_RATES: | |
678 | elems->ext_supp_rates = pos; | |
679 | elems->ext_supp_rates_len = elen; | |
680 | break; | |
681 | case WLAN_EID_HT_CAPABILITY: | |
682 | if (elen >= sizeof(struct ieee80211_ht_cap)) | |
683 | elems->ht_cap_elem = (void *)pos; | |
fcff4f10 PS |
684 | else |
685 | elem_parse_failed = true; | |
dd76986b | 686 | break; |
074d46d1 JB |
687 | case WLAN_EID_HT_OPERATION: |
688 | if (elen >= sizeof(struct ieee80211_ht_operation)) | |
689 | elems->ht_operation = (void *)pos; | |
fcff4f10 PS |
690 | else |
691 | elem_parse_failed = true; | |
dd76986b JB |
692 | break; |
693 | case WLAN_EID_MESH_ID: | |
694 | elems->mesh_id = pos; | |
695 | elems->mesh_id_len = elen; | |
696 | break; | |
697 | case WLAN_EID_MESH_CONFIG: | |
698 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) | |
699 | elems->mesh_config = (void *)pos; | |
fcff4f10 PS |
700 | else |
701 | elem_parse_failed = true; | |
dd76986b JB |
702 | break; |
703 | case WLAN_EID_PEER_MGMT: | |
704 | elems->peering = pos; | |
705 | elems->peering_len = elen; | |
706 | break; | |
707 | case WLAN_EID_PREQ: | |
708 | elems->preq = pos; | |
709 | elems->preq_len = elen; | |
710 | break; | |
711 | case WLAN_EID_PREP: | |
712 | elems->prep = pos; | |
713 | elems->prep_len = elen; | |
714 | break; | |
715 | case WLAN_EID_PERR: | |
716 | elems->perr = pos; | |
717 | elems->perr_len = elen; | |
718 | break; | |
719 | case WLAN_EID_RANN: | |
720 | if (elen >= sizeof(struct ieee80211_rann_ie)) | |
721 | elems->rann = (void *)pos; | |
fcff4f10 PS |
722 | else |
723 | elem_parse_failed = true; | |
dd76986b JB |
724 | break; |
725 | case WLAN_EID_CHANNEL_SWITCH: | |
726 | elems->ch_switch_elem = pos; | |
727 | elems->ch_switch_elem_len = elen; | |
728 | break; | |
729 | case WLAN_EID_QUIET: | |
730 | if (!elems->quiet_elem) { | |
731 | elems->quiet_elem = pos; | |
732 | elems->quiet_elem_len = elen; | |
733 | } | |
734 | elems->num_of_quiet_elem++; | |
735 | break; | |
736 | case WLAN_EID_COUNTRY: | |
737 | elems->country_elem = pos; | |
738 | elems->country_elem_len = elen; | |
739 | break; | |
740 | case WLAN_EID_PWR_CONSTRAINT: | |
741 | elems->pwr_constr_elem = pos; | |
742 | elems->pwr_constr_elem_len = elen; | |
743 | break; | |
744 | case WLAN_EID_TIMEOUT_INTERVAL: | |
745 | elems->timeout_int = pos; | |
746 | elems->timeout_int_len = elen; | |
747 | break; | |
748 | default: | |
749 | break; | |
750 | } | |
751 | ||
fcff4f10 PS |
752 | if (elem_parse_failed) |
753 | elems->parse_error = true; | |
754 | else | |
755 | set_bit(id, seen_elems); | |
756 | ||
dd76986b JB |
757 | left -= elen; |
758 | pos += elen; | |
759 | } | |
760 | ||
fcff4f10 PS |
761 | if (left != 0) |
762 | elems->parse_error = true; | |
763 | ||
dd76986b JB |
764 | return crc; |
765 | } | |
766 | ||
37ffc8da JB |
767 | void ieee802_11_parse_elems(u8 *start, size_t len, |
768 | struct ieee802_11_elems *elems) | |
d91f36db JB |
769 | { |
770 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
771 | } | |
772 | ||
3abead59 JB |
773 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, |
774 | bool bss_notify) | |
5825fe10 JB |
775 | { |
776 | struct ieee80211_local *local = sdata->local; | |
777 | struct ieee80211_tx_queue_params qparam; | |
54bcbc69 | 778 | int ac; |
aa837e1d JB |
779 | bool use_11b; |
780 | int aCWmin, aCWmax; | |
5825fe10 JB |
781 | |
782 | if (!local->ops->conf_tx) | |
783 | return; | |
784 | ||
54bcbc69 JB |
785 | if (local->hw.queues < IEEE80211_NUM_ACS) |
786 | return; | |
787 | ||
5825fe10 JB |
788 | memset(&qparam, 0, sizeof(qparam)); |
789 | ||
aa837e1d JB |
790 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
791 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 792 | |
54bcbc69 | 793 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
aa837e1d JB |
794 | /* Set defaults according to 802.11-2007 Table 7-37 */ |
795 | aCWmax = 1023; | |
796 | if (use_11b) | |
797 | aCWmin = 31; | |
798 | else | |
799 | aCWmin = 15; | |
800 | ||
54bcbc69 | 801 | switch (ac) { |
1d98fb12 | 802 | case IEEE80211_AC_BK: |
7ba10a8e JB |
803 | qparam.cw_max = aCWmax; |
804 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
805 | qparam.txop = 0; |
806 | qparam.aifs = 7; | |
807 | break; | |
808 | default: /* never happens but let's not leave undefined */ | |
1d98fb12 | 809 | case IEEE80211_AC_BE: |
7ba10a8e JB |
810 | qparam.cw_max = aCWmax; |
811 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
812 | qparam.txop = 0; |
813 | qparam.aifs = 3; | |
814 | break; | |
1d98fb12 | 815 | case IEEE80211_AC_VI: |
aa837e1d JB |
816 | qparam.cw_max = aCWmin; |
817 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
818 | if (use_11b) | |
819 | qparam.txop = 6016/32; | |
820 | else | |
821 | qparam.txop = 3008/32; | |
822 | qparam.aifs = 2; | |
823 | break; | |
1d98fb12 | 824 | case IEEE80211_AC_VO: |
aa837e1d JB |
825 | qparam.cw_max = (aCWmin + 1) / 2 - 1; |
826 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
827 | if (use_11b) | |
828 | qparam.txop = 3264/32; | |
829 | else | |
830 | qparam.txop = 1504/32; | |
831 | qparam.aifs = 2; | |
832 | break; | |
833 | } | |
5825fe10 | 834 | |
ab13315a KV |
835 | qparam.uapsd = false; |
836 | ||
54bcbc69 JB |
837 | sdata->tx_conf[ac] = qparam; |
838 | drv_conf_tx(local, sdata, ac, &qparam); | |
aa837e1d | 839 | } |
e1b3ec1a SG |
840 | |
841 | /* after reinitialize QoS TX queues setting to default, | |
842 | * disable QoS at all */ | |
d9734979 S |
843 | |
844 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { | |
845 | sdata->vif.bss_conf.qos = | |
846 | sdata->vif.type != NL80211_IFTYPE_STATION; | |
3abead59 JB |
847 | if (bss_notify) |
848 | ieee80211_bss_info_change_notify(sdata, | |
849 | BSS_CHANGED_QOS); | |
d9734979 | 850 | } |
5825fe10 | 851 | } |
e50db65c | 852 | |
46900298 JB |
853 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
854 | const size_t supp_rates_len, | |
855 | const u8 *supp_rates) | |
856 | { | |
857 | struct ieee80211_local *local = sdata->local; | |
858 | int i, have_higher_than_11mbit = 0; | |
859 | ||
860 | /* cf. IEEE 802.11 9.2.12 */ | |
861 | for (i = 0; i < supp_rates_len; i++) | |
862 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
863 | have_higher_than_11mbit = 1; | |
864 | ||
865 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
866 | have_higher_than_11mbit) | |
867 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
868 | else | |
869 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
870 | ||
3abead59 | 871 | ieee80211_set_wmm_default(sdata, true); |
46900298 JB |
872 | } |
873 | ||
881d948c | 874 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
875 | enum ieee80211_band band) |
876 | { | |
877 | struct ieee80211_supported_band *sband; | |
878 | struct ieee80211_rate *bitrates; | |
881d948c | 879 | u32 mandatory_rates; |
96dd22ac JB |
880 | enum ieee80211_rate_flags mandatory_flag; |
881 | int i; | |
882 | ||
883 | sband = local->hw.wiphy->bands[band]; | |
884 | if (!sband) { | |
885 | WARN_ON(1); | |
886 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
887 | } | |
888 | ||
889 | if (band == IEEE80211_BAND_2GHZ) | |
890 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
891 | else | |
892 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
893 | ||
894 | bitrates = sband->bitrates; | |
895 | mandatory_rates = 0; | |
896 | for (i = 0; i < sband->n_bitrates; i++) | |
897 | if (bitrates[i].flags & mandatory_flag) | |
898 | mandatory_rates |= BIT(i); | |
899 | return mandatory_rates; | |
900 | } | |
46900298 JB |
901 | |
902 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
903 | u16 transaction, u16 auth_alg, | |
efa6a09d AQ |
904 | u8 *extra, size_t extra_len, const u8 *da, |
905 | const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx) | |
46900298 JB |
906 | { |
907 | struct ieee80211_local *local = sdata->local; | |
908 | struct sk_buff *skb; | |
909 | struct ieee80211_mgmt *mgmt; | |
fffd0934 | 910 | int err; |
46900298 JB |
911 | |
912 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 913 | sizeof(*mgmt) + 6 + extra_len); |
d15b8459 | 914 | if (!skb) |
46900298 | 915 | return; |
d15b8459 | 916 | |
46900298 JB |
917 | skb_reserve(skb, local->hw.extra_tx_headroom); |
918 | ||
919 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
920 | memset(mgmt, 0, 24 + 6); | |
921 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
922 | IEEE80211_STYPE_AUTH); | |
efa6a09d | 923 | memcpy(mgmt->da, da, ETH_ALEN); |
47846c9b | 924 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
925 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
926 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
927 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
928 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
929 | if (extra) | |
930 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 931 | |
fffd0934 JB |
932 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
933 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
934 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
935 | WARN_ON(err); | |
936 | } | |
937 | ||
62ae67be JB |
938 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
939 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
940 | } |
941 | ||
de95a54b | 942 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 943 | const u8 *ie, size_t ie_len, |
651b5225 JM |
944 | enum ieee80211_band band, u32 rate_mask, |
945 | u8 channel) | |
de95a54b JB |
946 | { |
947 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
948 | u8 *pos; |
949 | size_t offset = 0, noffset; | |
950 | int supp_rates_len, i; | |
8dcb2003 JM |
951 | u8 rates[32]; |
952 | int num_rates; | |
953 | int ext_rates_len; | |
de95a54b | 954 | |
4d36ec58 | 955 | sband = local->hw.wiphy->bands[band]; |
de95a54b JB |
956 | |
957 | pos = buffer; | |
958 | ||
8dcb2003 JM |
959 | num_rates = 0; |
960 | for (i = 0; i < sband->n_bitrates; i++) { | |
961 | if ((BIT(i) & rate_mask) == 0) | |
962 | continue; /* skip rate */ | |
963 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
964 | } | |
965 | ||
966 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 967 | |
de95a54b | 968 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 969 | *pos++ = supp_rates_len; |
8dcb2003 JM |
970 | memcpy(pos, rates, supp_rates_len); |
971 | pos += supp_rates_len; | |
8e664fb3 JB |
972 | |
973 | /* insert "request information" if in custom IEs */ | |
974 | if (ie && ie_len) { | |
975 | static const u8 before_extrates[] = { | |
976 | WLAN_EID_SSID, | |
977 | WLAN_EID_SUPP_RATES, | |
978 | WLAN_EID_REQUEST, | |
979 | }; | |
980 | noffset = ieee80211_ie_split(ie, ie_len, | |
981 | before_extrates, | |
982 | ARRAY_SIZE(before_extrates), | |
983 | offset); | |
984 | memcpy(pos, ie + offset, noffset - offset); | |
985 | pos += noffset - offset; | |
986 | offset = noffset; | |
987 | } | |
988 | ||
8dcb2003 JM |
989 | ext_rates_len = num_rates - supp_rates_len; |
990 | if (ext_rates_len > 0) { | |
8e664fb3 | 991 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
992 | *pos++ = ext_rates_len; |
993 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
994 | pos += ext_rates_len; | |
8e664fb3 JB |
995 | } |
996 | ||
651b5225 JM |
997 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
998 | *pos++ = WLAN_EID_DS_PARAMS; | |
999 | *pos++ = 1; | |
1000 | *pos++ = channel; | |
1001 | } | |
1002 | ||
8e664fb3 JB |
1003 | /* insert custom IEs that go before HT */ |
1004 | if (ie && ie_len) { | |
1005 | static const u8 before_ht[] = { | |
1006 | WLAN_EID_SSID, | |
1007 | WLAN_EID_SUPP_RATES, | |
1008 | WLAN_EID_REQUEST, | |
1009 | WLAN_EID_EXT_SUPP_RATES, | |
1010 | WLAN_EID_DS_PARAMS, | |
1011 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
1012 | }; | |
1013 | noffset = ieee80211_ie_split(ie, ie_len, | |
1014 | before_ht, ARRAY_SIZE(before_ht), | |
1015 | offset); | |
1016 | memcpy(pos, ie + offset, noffset - offset); | |
1017 | pos += noffset - offset; | |
1018 | offset = noffset; | |
de95a54b JB |
1019 | } |
1020 | ||
42e7aa77 | 1021 | if (sband->ht_cap.ht_supported) |
ef96a842 BG |
1022 | pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, |
1023 | sband->ht_cap.cap); | |
5ef2d41a | 1024 | |
de95a54b JB |
1025 | /* |
1026 | * If adding more here, adjust code in main.c | |
1027 | * that calculates local->scan_ies_len. | |
1028 | */ | |
1029 | ||
8e664fb3 JB |
1030 | /* add any remaining custom IEs */ |
1031 | if (ie && ie_len) { | |
1032 | noffset = ie_len; | |
1033 | memcpy(pos, ie + offset, noffset - offset); | |
1034 | pos += noffset - offset; | |
de95a54b JB |
1035 | } |
1036 | ||
1037 | return pos - buffer; | |
1038 | } | |
1039 | ||
a619a4c0 | 1040 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
85a237fe | 1041 | u8 *dst, u32 ratemask, |
a619a4c0 | 1042 | const u8 *ssid, size_t ssid_len, |
a806c558 PS |
1043 | const u8 *ie, size_t ie_len, |
1044 | bool directed) | |
46900298 JB |
1045 | { |
1046 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
1047 | struct sk_buff *skb; |
1048 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
1049 | size_t buf_len; |
1050 | u8 *buf; | |
651b5225 | 1051 | u8 chan; |
7c12ce8b KV |
1052 | |
1053 | /* FIXME: come up with a proper value */ | |
1054 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
d15b8459 | 1055 | if (!buf) |
a619a4c0 | 1056 | return NULL; |
46900298 | 1057 | |
a806c558 PS |
1058 | /* |
1059 | * Do not send DS Channel parameter for directed probe requests | |
1060 | * in order to maximize the chance that we get a response. Some | |
1061 | * badly-behaved APs don't respond when this parameter is included. | |
1062 | */ | |
1063 | if (directed) | |
1064 | chan = 0; | |
1065 | else | |
1066 | chan = ieee80211_frequency_to_channel( | |
1067 | local->hw.conf.channel->center_freq); | |
651b5225 | 1068 | |
7c12ce8b | 1069 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
8dcb2003 | 1070 | local->hw.conf.channel->band, |
85a237fe | 1071 | ratemask, chan); |
7c12ce8b KV |
1072 | |
1073 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
1074 | ssid, ssid_len, | |
1075 | buf, buf_len); | |
5b2bbf75 JB |
1076 | if (!skb) |
1077 | goto out; | |
7c12ce8b | 1078 | |
46900298 | 1079 | if (dst) { |
7c12ce8b | 1080 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
1081 | memcpy(mgmt->da, dst, ETH_ALEN); |
1082 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 1083 | } |
46900298 | 1084 | |
62ae67be | 1085 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5b2bbf75 JB |
1086 | |
1087 | out: | |
145b6d1a | 1088 | kfree(buf); |
a619a4c0 JO |
1089 | |
1090 | return skb; | |
1091 | } | |
1092 | ||
1093 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
1094 | const u8 *ssid, size_t ssid_len, | |
a806c558 | 1095 | const u8 *ie, size_t ie_len, |
aad14ceb | 1096 | u32 ratemask, bool directed, bool no_cck) |
a619a4c0 JO |
1097 | { |
1098 | struct sk_buff *skb; | |
1099 | ||
85a237fe JB |
1100 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, |
1101 | ie, ie_len, directed); | |
aad14ceb RM |
1102 | if (skb) { |
1103 | if (no_cck) | |
1104 | IEEE80211_SKB_CB(skb)->flags |= | |
1105 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
a619a4c0 | 1106 | ieee80211_tx_skb(sdata, skb); |
aad14ceb | 1107 | } |
46900298 JB |
1108 | } |
1109 | ||
1110 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
1111 | struct ieee802_11_elems *elems, | |
9ebb61a2 | 1112 | enum ieee80211_band band, u32 *basic_rates) |
46900298 JB |
1113 | { |
1114 | struct ieee80211_supported_band *sband; | |
1115 | struct ieee80211_rate *bitrates; | |
1116 | size_t num_rates; | |
1117 | u32 supp_rates; | |
1118 | int i, j; | |
1119 | sband = local->hw.wiphy->bands[band]; | |
1120 | ||
1121 | if (!sband) { | |
1122 | WARN_ON(1); | |
1123 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1124 | } | |
1125 | ||
1126 | bitrates = sband->bitrates; | |
1127 | num_rates = sband->n_bitrates; | |
1128 | supp_rates = 0; | |
1129 | for (i = 0; i < elems->supp_rates_len + | |
1130 | elems->ext_supp_rates_len; i++) { | |
1131 | u8 rate = 0; | |
1132 | int own_rate; | |
9ebb61a2 | 1133 | bool is_basic; |
46900298 JB |
1134 | if (i < elems->supp_rates_len) |
1135 | rate = elems->supp_rates[i]; | |
1136 | else if (elems->ext_supp_rates) | |
1137 | rate = elems->ext_supp_rates | |
1138 | [i - elems->supp_rates_len]; | |
1139 | own_rate = 5 * (rate & 0x7f); | |
9ebb61a2 AN |
1140 | is_basic = !!(rate & 0x80); |
1141 | ||
1142 | if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1143 | continue; | |
1144 | ||
1145 | for (j = 0; j < num_rates; j++) { | |
1146 | if (bitrates[j].bitrate == own_rate) { | |
46900298 | 1147 | supp_rates |= BIT(j); |
9ebb61a2 AN |
1148 | if (basic_rates && is_basic) |
1149 | *basic_rates |= BIT(j); | |
1150 | } | |
1151 | } | |
46900298 JB |
1152 | } |
1153 | return supp_rates; | |
1154 | } | |
f2753ddb | 1155 | |
84f6a01c JB |
1156 | void ieee80211_stop_device(struct ieee80211_local *local) |
1157 | { | |
1158 | ieee80211_led_radio(local, false); | |
67408c8c | 1159 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
84f6a01c JB |
1160 | |
1161 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
1162 | |
1163 | flush_workqueue(local->workqueue); | |
678f415f | 1164 | drv_stop(local); |
84f6a01c JB |
1165 | } |
1166 | ||
f2753ddb JB |
1167 | int ieee80211_reconfig(struct ieee80211_local *local) |
1168 | { | |
1169 | struct ieee80211_hw *hw = &local->hw; | |
1170 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 1171 | struct sta_info *sta; |
2683d65b | 1172 | int res, i; |
5bb644a0 | 1173 | |
eecc4800 | 1174 | #ifdef CONFIG_PM |
ceb99fe0 JB |
1175 | if (local->suspended) |
1176 | local->resuming = true; | |
f2753ddb | 1177 | |
eecc4800 JB |
1178 | if (local->wowlan) { |
1179 | local->wowlan = false; | |
1180 | res = drv_resume(local); | |
1181 | if (res < 0) { | |
1182 | local->resuming = false; | |
1183 | return res; | |
1184 | } | |
1185 | if (res == 0) | |
1186 | goto wake_up; | |
1187 | WARN_ON(res > 1); | |
1188 | /* | |
1189 | * res is 1, which means the driver requested | |
1190 | * to go through a regular reset on wakeup. | |
1191 | */ | |
1192 | } | |
1193 | #endif | |
94f9b97b JB |
1194 | /* everything else happens only if HW was up & running */ |
1195 | if (!local->open_count) | |
1196 | goto wake_up; | |
f2753ddb | 1197 | |
94f9b97b JB |
1198 | /* |
1199 | * Upon resume hardware can sometimes be goofy due to | |
1200 | * various platform / driver / bus issues, so restarting | |
1201 | * the device may at times not work immediately. Propagate | |
1202 | * the error. | |
1203 | */ | |
1204 | res = drv_start(local); | |
1205 | if (res) { | |
1206 | WARN(local->suspended, "Hardware became unavailable " | |
1207 | "upon resume. This could be a software issue " | |
1208 | "prior to suspend or a hardware issue.\n"); | |
1209 | return res; | |
f2753ddb JB |
1210 | } |
1211 | ||
7f281975 YAP |
1212 | /* setup fragmentation threshold */ |
1213 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
1214 | ||
1215 | /* setup RTS threshold */ | |
1216 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
1217 | ||
1218 | /* reset coverage class */ | |
1219 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
1220 | ||
94f9b97b JB |
1221 | ieee80211_led_radio(local, true); |
1222 | ieee80211_mod_tpt_led_trig(local, | |
1223 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1224 | ||
f2753ddb JB |
1225 | /* add interfaces */ |
1226 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1227 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1228 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f | 1229 | ieee80211_sdata_running(sdata)) |
7b7eab6f | 1230 | res = drv_add_interface(local, sdata); |
f2753ddb JB |
1231 | } |
1232 | ||
1233 | /* add STAs back */ | |
34e89507 JB |
1234 | mutex_lock(&local->sta_mtx); |
1235 | list_for_each_entry(sta, &local->sta_list, list) { | |
f09603a2 JB |
1236 | if (sta->uploaded) { |
1237 | enum ieee80211_sta_state state; | |
1238 | ||
f09603a2 JB |
1239 | for (state = IEEE80211_STA_NOTEXIST; |
1240 | state < sta->sta_state - 1; state++) | |
1241 | WARN_ON(drv_sta_state(local, sta->sdata, sta, | |
1242 | state, state + 1)); | |
1243 | } | |
f2753ddb | 1244 | } |
34e89507 | 1245 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1246 | |
2683d65b | 1247 | /* reconfigure tx conf */ |
54bcbc69 JB |
1248 | if (hw->queues >= IEEE80211_NUM_ACS) { |
1249 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1250 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1251 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1252 | !ieee80211_sdata_running(sdata)) | |
1253 | continue; | |
f6f3def3 | 1254 | |
54bcbc69 JB |
1255 | for (i = 0; i < IEEE80211_NUM_ACS; i++) |
1256 | drv_conf_tx(local, sdata, i, | |
1257 | &sdata->tx_conf[i]); | |
1258 | } | |
f6f3def3 | 1259 | } |
2683d65b | 1260 | |
f2753ddb JB |
1261 | /* reconfigure hardware */ |
1262 | ieee80211_hw_config(local, ~0); | |
1263 | ||
f2753ddb | 1264 | ieee80211_configure_filter(local); |
f2753ddb JB |
1265 | |
1266 | /* Finally also reconfigure all the BSS information */ | |
1267 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1268 | u32 changed; |
1269 | ||
9607e6b6 | 1270 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1271 | continue; |
ac8dd506 JB |
1272 | |
1273 | /* common change flags for all interface types */ | |
1274 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1275 | BSS_CHANGED_ERP_PREAMBLE | | |
1276 | BSS_CHANGED_ERP_SLOT | | |
1277 | BSS_CHANGED_HT | | |
1278 | BSS_CHANGED_BASIC_RATES | | |
1279 | BSS_CHANGED_BEACON_INT | | |
1280 | BSS_CHANGED_BSSID | | |
4ced3f74 | 1281 | BSS_CHANGED_CQM | |
55de47f6 EP |
1282 | BSS_CHANGED_QOS | |
1283 | BSS_CHANGED_IDLE; | |
ac8dd506 | 1284 | |
f2753ddb JB |
1285 | switch (sdata->vif.type) { |
1286 | case NL80211_IFTYPE_STATION: | |
0d392e93 EP |
1287 | changed |= BSS_CHANGED_ASSOC | |
1288 | BSS_CHANGED_ARP_FILTER; | |
a7b545f7 | 1289 | mutex_lock(&sdata->u.mgd.mtx); |
ac8dd506 | 1290 | ieee80211_bss_info_change_notify(sdata, changed); |
a7b545f7 | 1291 | mutex_unlock(&sdata->u.mgd.mtx); |
ac8dd506 | 1292 | break; |
f2753ddb | 1293 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1294 | changed |= BSS_CHANGED_IBSS; |
1295 | /* fall through */ | |
f2753ddb | 1296 | case NL80211_IFTYPE_AP: |
e7979ac7 AN |
1297 | changed |= BSS_CHANGED_SSID; |
1298 | ||
1299 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1300 | changed |= BSS_CHANGED_AP_PROBE_RESP; | |
1301 | ||
7827493b | 1302 | /* fall through */ |
f2753ddb | 1303 | case NL80211_IFTYPE_MESH_POINT: |
ac8dd506 JB |
1304 | changed |= BSS_CHANGED_BEACON | |
1305 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1306 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1307 | break; |
1308 | case NL80211_IFTYPE_WDS: | |
1309 | break; | |
1310 | case NL80211_IFTYPE_AP_VLAN: | |
1311 | case NL80211_IFTYPE_MONITOR: | |
1312 | /* ignore virtual */ | |
1313 | break; | |
1314 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1315 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1316 | case NL80211_IFTYPE_P2P_CLIENT: |
1317 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1318 | WARN_ON(1); |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | ||
8e1b23b9 ES |
1323 | ieee80211_recalc_ps(local, -1); |
1324 | ||
6e1b1b24 EP |
1325 | /* |
1326 | * The sta might be in psm against the ap (e.g. because | |
1327 | * this was the state before a hw restart), so we | |
1328 | * explicitly send a null packet in order to make sure | |
1329 | * it'll sync against the ap (and get out of psm). | |
1330 | */ | |
1331 | if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { | |
1332 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1333 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1334 | continue; | |
1335 | ||
1336 | ieee80211_send_nullfunc(local, sdata, 0); | |
1337 | } | |
1338 | } | |
1339 | ||
2a419056 JB |
1340 | /* |
1341 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1342 | * sessions can be established after a resume. | |
1343 | * | |
1344 | * Also tear down aggregation sessions since reconfiguring | |
1345 | * them in a hardware restart scenario is not easily done | |
1346 | * right now, and the hardware will have lost information | |
1347 | * about the sessions, but we and the AP still think they | |
1348 | * are active. This is really a workaround though. | |
1349 | */ | |
74e2bd1f | 1350 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1351 | mutex_lock(&local->sta_mtx); |
1352 | ||
1353 | list_for_each_entry(sta, &local->sta_list, list) { | |
53f73c09 | 1354 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
c2c98fde | 1355 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1356 | } |
2a419056 JB |
1357 | |
1358 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1359 | } |
74e2bd1f | 1360 | |
f2753ddb JB |
1361 | /* add back keys */ |
1362 | list_for_each_entry(sdata, &local->interfaces, list) | |
9607e6b6 | 1363 | if (ieee80211_sdata_running(sdata)) |
f2753ddb JB |
1364 | ieee80211_enable_keys(sdata); |
1365 | ||
eecc4800 | 1366 | wake_up: |
f2753ddb JB |
1367 | ieee80211_wake_queues_by_reason(hw, |
1368 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1369 | ||
5bb644a0 JB |
1370 | /* |
1371 | * If this is for hw restart things are still running. | |
1372 | * We may want to change that later, however. | |
1373 | */ | |
ceb99fe0 | 1374 | if (!local->suspended) |
5bb644a0 JB |
1375 | return 0; |
1376 | ||
1377 | #ifdef CONFIG_PM | |
ceb99fe0 | 1378 | /* first set suspended false, then resuming */ |
5bb644a0 | 1379 | local->suspended = false; |
ceb99fe0 JB |
1380 | mb(); |
1381 | local->resuming = false; | |
5bb644a0 JB |
1382 | |
1383 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1384 | switch(sdata->vif.type) { | |
1385 | case NL80211_IFTYPE_STATION: | |
1386 | ieee80211_sta_restart(sdata); | |
1387 | break; | |
1388 | case NL80211_IFTYPE_ADHOC: | |
1389 | ieee80211_ibss_restart(sdata); | |
1390 | break; | |
1391 | case NL80211_IFTYPE_MESH_POINT: | |
1392 | ieee80211_mesh_restart(sdata); | |
1393 | break; | |
1394 | default: | |
1395 | break; | |
1396 | } | |
1397 | } | |
1398 | ||
26d59535 | 1399 | mod_timer(&local->sta_cleanup, jiffies + 1); |
5bb644a0 | 1400 | |
34e89507 | 1401 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1402 | list_for_each_entry(sta, &local->sta_list, list) |
1403 | mesh_plink_restart(sta); | |
34e89507 | 1404 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1405 | #else |
1406 | WARN_ON(1); | |
1407 | #endif | |
f2753ddb JB |
1408 | return 0; |
1409 | } | |
42935eca | 1410 | |
95acac61 JB |
1411 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
1412 | { | |
1413 | struct ieee80211_sub_if_data *sdata; | |
1414 | struct ieee80211_local *local; | |
1415 | struct ieee80211_key *key; | |
1416 | ||
1417 | if (WARN_ON(!vif)) | |
1418 | return; | |
1419 | ||
1420 | sdata = vif_to_sdata(vif); | |
1421 | local = sdata->local; | |
1422 | ||
1423 | if (WARN_ON(!local->resuming)) | |
1424 | return; | |
1425 | ||
1426 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1427 | return; | |
1428 | ||
1429 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1430 | ||
1431 | mutex_lock(&local->key_mtx); | |
1432 | list_for_each_entry(key, &sdata->key_list, list) | |
1433 | key->flags |= KEY_FLAG_TAINTED; | |
1434 | mutex_unlock(&local->key_mtx); | |
1435 | } | |
1436 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1437 | ||
0f78231b JB |
1438 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1439 | enum ieee80211_smps_mode *smps_mode) | |
1440 | { | |
1441 | if (ifmgd->associated) { | |
1442 | *smps_mode = ifmgd->ap_smps; | |
1443 | ||
1444 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1445 | if (ifmgd->powersave) | |
1446 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1447 | else | |
1448 | *smps_mode = IEEE80211_SMPS_OFF; | |
1449 | } | |
1450 | ||
1451 | return 1; | |
1452 | } | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | /* must hold iflist_mtx */ | |
025e6be2 | 1458 | void ieee80211_recalc_smps(struct ieee80211_local *local) |
0f78231b JB |
1459 | { |
1460 | struct ieee80211_sub_if_data *sdata; | |
1461 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1462 | int count = 0; | |
1463 | ||
46a5ebaf | 1464 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1465 | |
1466 | /* | |
1467 | * This function could be improved to handle multiple | |
1468 | * interfaces better, but right now it makes any | |
1469 | * non-station interfaces force SM PS to be turned | |
1470 | * off. If there are multiple station interfaces it | |
1471 | * could also use the best possible mode, e.g. if | |
1472 | * one is in static and the other in dynamic then | |
1473 | * dynamic is ok. | |
1474 | */ | |
1475 | ||
1476 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1477 | if (!ieee80211_sdata_running(sdata)) |
0f78231b JB |
1478 | continue; |
1479 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1480 | goto set; | |
025e6be2 JB |
1481 | |
1482 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
0f78231b JB |
1483 | |
1484 | if (count > 1) { | |
1485 | smps_mode = IEEE80211_SMPS_OFF; | |
1486 | break; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | if (smps_mode == local->smps_mode) | |
1491 | return; | |
1492 | ||
1493 | set: | |
1494 | local->smps_mode = smps_mode; | |
1495 | /* changed flag is auto-detected for this */ | |
1496 | ieee80211_hw_config(local, 0); | |
1497 | } | |
8e664fb3 JB |
1498 | |
1499 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1500 | { | |
1501 | int i; | |
1502 | ||
1503 | for (i = 0; i < n_ids; i++) | |
1504 | if (ids[i] == id) | |
1505 | return true; | |
1506 | return false; | |
1507 | } | |
1508 | ||
1509 | /** | |
1510 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1511 | * | |
1512 | * @ies: the IE buffer | |
1513 | * @ielen: the length of the IE buffer | |
1514 | * @ids: an array with element IDs that are allowed before | |
1515 | * the split | |
1516 | * @n_ids: the size of the element ID array | |
1517 | * @offset: offset where to start splitting in the buffer | |
1518 | * | |
1519 | * This function splits an IE buffer by updating the @offset | |
1520 | * variable to point to the location where the buffer should be | |
1521 | * split. | |
1522 | * | |
1523 | * It assumes that the given IE buffer is well-formed, this | |
1524 | * has to be guaranteed by the caller! | |
1525 | * | |
1526 | * It also assumes that the IEs in the buffer are ordered | |
1527 | * correctly, if not the result of using this function will not | |
1528 | * be ordered correctly either, i.e. it does no reordering. | |
1529 | * | |
1530 | * The function returns the offset where the next part of the | |
1531 | * buffer starts, which may be @ielen if the entire (remainder) | |
1532 | * of the buffer should be used. | |
1533 | */ | |
1534 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1535 | const u8 *ids, int n_ids, size_t offset) | |
1536 | { | |
1537 | size_t pos = offset; | |
1538 | ||
1539 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1540 | pos += 2 + ies[pos + 1]; | |
1541 | ||
1542 | return pos; | |
1543 | } | |
1544 | ||
1545 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1546 | { | |
1547 | size_t pos = offset; | |
1548 | ||
1549 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1550 | pos += 2 + ies[pos + 1]; | |
1551 | ||
1552 | return pos; | |
1553 | } | |
615f7b9b MV |
1554 | |
1555 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1556 | int rssi_min_thold, | |
1557 | int rssi_max_thold) | |
1558 | { | |
1559 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1560 | ||
1561 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1562 | return; | |
1563 | ||
1564 | /* | |
1565 | * Scale up threshold values before storing it, as the RSSI averaging | |
1566 | * algorithm uses a scaled up value as well. Change this scaling | |
1567 | * factor if the RSSI averaging algorithm changes. | |
1568 | */ | |
1569 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1570 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1571 | } | |
1572 | ||
1573 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1574 | int rssi_min_thold, | |
1575 | int rssi_max_thold) | |
1576 | { | |
1577 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1578 | ||
1579 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1580 | rssi_min_thold > rssi_max_thold); | |
1581 | ||
1582 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1583 | rssi_max_thold); | |
1584 | } | |
1585 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1586 | ||
1587 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1588 | { | |
1589 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1590 | ||
1591 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1592 | } | |
1593 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); | |
768db343 | 1594 | |
ef96a842 | 1595 | u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
42e7aa77 AS |
1596 | u16 cap) |
1597 | { | |
1598 | __le16 tmp; | |
1599 | ||
1600 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
1601 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
1602 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
1603 | ||
1604 | /* capability flags */ | |
1605 | tmp = cpu_to_le16(cap); | |
1606 | memcpy(pos, &tmp, sizeof(u16)); | |
1607 | pos += sizeof(u16); | |
1608 | ||
1609 | /* AMPDU parameters */ | |
ef96a842 BG |
1610 | *pos++ = ht_cap->ampdu_factor | |
1611 | (ht_cap->ampdu_density << | |
42e7aa77 AS |
1612 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
1613 | ||
1614 | /* MCS set */ | |
ef96a842 BG |
1615 | memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); |
1616 | pos += sizeof(ht_cap->mcs); | |
42e7aa77 AS |
1617 | |
1618 | /* extended capabilities */ | |
1619 | pos += sizeof(__le16); | |
1620 | ||
1621 | /* BF capabilities */ | |
1622 | pos += sizeof(__le32); | |
1623 | ||
1624 | /* antenna selection */ | |
1625 | pos += sizeof(u8); | |
1626 | ||
1627 | return pos; | |
1628 | } | |
1629 | ||
074d46d1 | 1630 | u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
42e7aa77 AS |
1631 | struct ieee80211_channel *channel, |
1632 | enum nl80211_channel_type channel_type) | |
1633 | { | |
074d46d1 | 1634 | struct ieee80211_ht_operation *ht_oper; |
42e7aa77 | 1635 | /* Build HT Information */ |
074d46d1 JB |
1636 | *pos++ = WLAN_EID_HT_OPERATION; |
1637 | *pos++ = sizeof(struct ieee80211_ht_operation); | |
1638 | ht_oper = (struct ieee80211_ht_operation *)pos; | |
1639 | ht_oper->primary_chan = | |
42e7aa77 AS |
1640 | ieee80211_frequency_to_channel(channel->center_freq); |
1641 | switch (channel_type) { | |
1642 | case NL80211_CHAN_HT40MINUS: | |
074d46d1 | 1643 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
42e7aa77 AS |
1644 | break; |
1645 | case NL80211_CHAN_HT40PLUS: | |
074d46d1 | 1646 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
42e7aa77 AS |
1647 | break; |
1648 | case NL80211_CHAN_HT20: | |
1649 | default: | |
074d46d1 | 1650 | ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; |
42e7aa77 AS |
1651 | break; |
1652 | } | |
1653 | if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) | |
074d46d1 | 1654 | ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; |
ff3cc5f4 SW |
1655 | |
1656 | /* | |
1657 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and | |
1658 | * RIFS Mode are reserved in IBSS mode, therefore keep them at 0 | |
1659 | */ | |
074d46d1 JB |
1660 | ht_oper->operation_mode = 0x0000; |
1661 | ht_oper->stbc_param = 0x0000; | |
42e7aa77 AS |
1662 | |
1663 | /* It seems that Basic MCS set and Supported MCS set | |
1664 | are identical for the first 10 bytes */ | |
074d46d1 JB |
1665 | memset(&ht_oper->basic_set, 0, 16); |
1666 | memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); | |
42e7aa77 | 1667 | |
074d46d1 | 1668 | return pos + sizeof(struct ieee80211_ht_operation); |
42e7aa77 AS |
1669 | } |
1670 | ||
1671 | enum nl80211_channel_type | |
074d46d1 | 1672 | ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper) |
42e7aa77 AS |
1673 | { |
1674 | enum nl80211_channel_type channel_type; | |
1675 | ||
074d46d1 | 1676 | if (!ht_oper) |
42e7aa77 AS |
1677 | return NL80211_CHAN_NO_HT; |
1678 | ||
074d46d1 | 1679 | switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
42e7aa77 AS |
1680 | case IEEE80211_HT_PARAM_CHA_SEC_NONE: |
1681 | channel_type = NL80211_CHAN_HT20; | |
1682 | break; | |
1683 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1684 | channel_type = NL80211_CHAN_HT40PLUS; | |
1685 | break; | |
1686 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1687 | channel_type = NL80211_CHAN_HT40MINUS; | |
1688 | break; | |
1689 | default: | |
1690 | channel_type = NL80211_CHAN_NO_HT; | |
1691 | } | |
1692 | ||
1693 | return channel_type; | |
1694 | } | |
1695 | ||
657c3e0c AN |
1696 | int ieee80211_add_srates_ie(struct ieee80211_vif *vif, |
1697 | struct sk_buff *skb, bool need_basic) | |
768db343 AN |
1698 | { |
1699 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1700 | struct ieee80211_local *local = sdata->local; | |
1701 | struct ieee80211_supported_band *sband; | |
1702 | int rate; | |
1703 | u8 i, rates, *pos; | |
657c3e0c | 1704 | u32 basic_rates = vif->bss_conf.basic_rates; |
768db343 AN |
1705 | |
1706 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1707 | rates = sband->n_bitrates; | |
1708 | if (rates > 8) | |
1709 | rates = 8; | |
1710 | ||
1711 | if (skb_tailroom(skb) < rates + 2) | |
1712 | return -ENOMEM; | |
1713 | ||
1714 | pos = skb_put(skb, rates + 2); | |
1715 | *pos++ = WLAN_EID_SUPP_RATES; | |
1716 | *pos++ = rates; | |
1717 | for (i = 0; i < rates; i++) { | |
657c3e0c AN |
1718 | u8 basic = 0; |
1719 | if (need_basic && basic_rates & BIT(i)) | |
1720 | basic = 0x80; | |
768db343 | 1721 | rate = sband->bitrates[i].bitrate; |
657c3e0c | 1722 | *pos++ = basic | (u8) (rate / 5); |
768db343 AN |
1723 | } |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
657c3e0c AN |
1728 | int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, |
1729 | struct sk_buff *skb, bool need_basic) | |
768db343 AN |
1730 | { |
1731 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1732 | struct ieee80211_local *local = sdata->local; | |
1733 | struct ieee80211_supported_band *sband; | |
1734 | int rate; | |
1735 | u8 i, exrates, *pos; | |
657c3e0c | 1736 | u32 basic_rates = vif->bss_conf.basic_rates; |
768db343 AN |
1737 | |
1738 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1739 | exrates = sband->n_bitrates; | |
1740 | if (exrates > 8) | |
1741 | exrates -= 8; | |
1742 | else | |
1743 | exrates = 0; | |
1744 | ||
1745 | if (skb_tailroom(skb) < exrates + 2) | |
1746 | return -ENOMEM; | |
1747 | ||
1748 | if (exrates) { | |
1749 | pos = skb_put(skb, exrates + 2); | |
1750 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1751 | *pos++ = exrates; | |
1752 | for (i = 8; i < sband->n_bitrates; i++) { | |
657c3e0c AN |
1753 | u8 basic = 0; |
1754 | if (need_basic && basic_rates & BIT(i)) | |
1755 | basic = 0x80; | |
768db343 | 1756 | rate = sband->bitrates[i].bitrate; |
657c3e0c | 1757 | *pos++ = basic | (u8) (rate / 5); |
768db343 AN |
1758 | } |
1759 | } | |
1760 | return 0; | |
1761 | } |