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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> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/if_arp.h> | |
c2d1560a | 21 | #include <linux/bitmap.h> |
d91f36db | 22 | #include <linux/crc32.h> |
881d966b | 23 | #include <net/net_namespace.h> |
c2d1560a | 24 | #include <net/cfg80211.h> |
dabeb344 | 25 | #include <net/rtnetlink.h> |
c2d1560a JB |
26 | |
27 | #include "ieee80211_i.h" | |
24487981 | 28 | #include "driver-ops.h" |
2c8dccc7 | 29 | #include "rate.h" |
ee385855 | 30 | #include "mesh.h" |
c2d1560a | 31 | #include "wme.h" |
f2753ddb | 32 | #include "led.h" |
fffd0934 | 33 | #include "wep.h" |
c2d1560a JB |
34 | |
35 | /* privid for wiphys to determine whether they belong to us or not */ | |
36 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
37 | ||
9a95371a LR |
38 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
39 | { | |
40 | struct ieee80211_local *local; | |
41 | BUG_ON(!wiphy); | |
42 | ||
43 | local = wiphy_priv(wiphy); | |
44 | return &local->hw; | |
45 | } | |
46 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 47 | |
71364716 | 48 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 49 | enum nl80211_iftype type) |
c2d1560a | 50 | { |
a494bb1c | 51 | __le16 fc = hdr->frame_control; |
c2d1560a | 52 | |
98f0b0a3 RR |
53 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
54 | if (len < 16) | |
c2d1560a JB |
55 | return NULL; |
56 | ||
a494bb1c | 57 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
58 | if (len < 24) /* drop incorrect hdr len (data) */ |
59 | return NULL; | |
a494bb1c HH |
60 | |
61 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 62 | return NULL; |
a494bb1c HH |
63 | if (ieee80211_has_tods(fc)) |
64 | return hdr->addr1; | |
65 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 66 | return hdr->addr2; |
a494bb1c HH |
67 | |
68 | return hdr->addr3; | |
69 | } | |
70 | ||
71 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
72 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
73 | return NULL; | |
c2d1560a | 74 | return hdr->addr3; |
a494bb1c HH |
75 | } |
76 | ||
77 | if (ieee80211_is_ctl(fc)) { | |
78 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 79 | return hdr->addr1; |
a494bb1c HH |
80 | |
81 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 82 | switch (type) { |
05c914fe | 83 | case NL80211_IFTYPE_STATION: |
71364716 | 84 | return hdr->addr2; |
05c914fe JB |
85 | case NL80211_IFTYPE_AP: |
86 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
87 | return hdr->addr1; |
88 | default: | |
a494bb1c | 89 | break; /* fall through to the return */ |
71364716 RR |
90 | } |
91 | } | |
c2d1560a JB |
92 | } |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
5cf121c3 | 97 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 98 | { |
2de8e0d9 JB |
99 | struct sk_buff *skb = tx->skb; |
100 | struct ieee80211_hdr *hdr; | |
101 | ||
102 | do { | |
103 | hdr = (struct ieee80211_hdr *) skb->data; | |
104 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
105 | } while ((skb = skb->next)); | |
c2d1560a JB |
106 | } |
107 | ||
108 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
109 | int rate, int erp, int short_preamble) | |
110 | { | |
111 | int dur; | |
112 | ||
113 | /* calculate duration (in microseconds, rounded up to next higher | |
114 | * integer if it includes a fractional microsecond) to send frame of | |
115 | * len bytes (does not include FCS) at the given rate. Duration will | |
116 | * also include SIFS. | |
117 | * | |
118 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
119 | * DIV_ROUND_UP() operations. | |
120 | */ | |
121 | ||
8318d78a | 122 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
123 | /* |
124 | * OFDM: | |
125 | * | |
126 | * N_DBPS = DATARATE x 4 | |
127 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
128 | * (16 = SIGNAL time, 6 = tail bits) | |
129 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
130 | * | |
131 | * T_SYM = 4 usec | |
132 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
133 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
134 | * signal ext = 6 usec | |
135 | */ | |
c2d1560a JB |
136 | dur = 16; /* SIFS + signal ext */ |
137 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
138 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
139 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
140 | 4 * rate); /* T_SYM x N_SYM */ | |
141 | } else { | |
142 | /* | |
143 | * 802.11b or 802.11g with 802.11b compatibility: | |
144 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
145 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
146 | * | |
147 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
148 | * aSIFSTime = 10 usec | |
149 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
150 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
151 | */ | |
152 | dur = 10; /* aSIFSTime = 10 usec */ | |
153 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
154 | ||
155 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
156 | } | |
157 | ||
158 | return dur; | |
159 | } | |
160 | ||
161 | /* Exported duration function for driver use */ | |
32bfd35d JB |
162 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
163 | struct ieee80211_vif *vif, | |
8318d78a JB |
164 | size_t frame_len, |
165 | struct ieee80211_rate *rate) | |
c2d1560a JB |
166 | { |
167 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 168 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
169 | u16 dur; |
170 | int erp; | |
25d834e1 | 171 | bool short_preamble = false; |
c2d1560a | 172 | |
8318d78a | 173 | erp = 0; |
25d834e1 JB |
174 | if (vif) { |
175 | sdata = vif_to_sdata(vif); | |
bda3933a | 176 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
177 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
178 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
179 | } | |
8318d78a JB |
180 | |
181 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 182 | short_preamble); |
c2d1560a JB |
183 | |
184 | return cpu_to_le16(dur); | |
185 | } | |
186 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
187 | ||
32bfd35d JB |
188 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
189 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 190 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
191 | { |
192 | struct ieee80211_local *local = hw_to_local(hw); | |
193 | struct ieee80211_rate *rate; | |
25d834e1 | 194 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 195 | bool short_preamble; |
c2d1560a JB |
196 | int erp; |
197 | u16 dur; | |
2e92e6f2 JB |
198 | struct ieee80211_supported_band *sband; |
199 | ||
200 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 201 | |
25d834e1 | 202 | short_preamble = false; |
7e9ed188 | 203 | |
e039fa4a | 204 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
205 | |
206 | erp = 0; | |
25d834e1 JB |
207 | if (vif) { |
208 | sdata = vif_to_sdata(vif); | |
bda3933a | 209 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
210 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
211 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
212 | } | |
c2d1560a JB |
213 | |
214 | /* CTS duration */ | |
8318d78a | 215 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
216 | erp, short_preamble); |
217 | /* Data frame duration */ | |
8318d78a | 218 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
219 | erp, short_preamble); |
220 | /* ACK duration */ | |
8318d78a | 221 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
222 | erp, short_preamble); |
223 | ||
224 | return cpu_to_le16(dur); | |
225 | } | |
226 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
227 | ||
32bfd35d JB |
228 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
229 | struct ieee80211_vif *vif, | |
c2d1560a | 230 | size_t frame_len, |
e039fa4a | 231 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
232 | { |
233 | struct ieee80211_local *local = hw_to_local(hw); | |
234 | struct ieee80211_rate *rate; | |
25d834e1 | 235 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 236 | bool short_preamble; |
c2d1560a JB |
237 | int erp; |
238 | u16 dur; | |
2e92e6f2 JB |
239 | struct ieee80211_supported_band *sband; |
240 | ||
241 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 242 | |
25d834e1 | 243 | short_preamble = false; |
7e9ed188 | 244 | |
e039fa4a | 245 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 246 | erp = 0; |
25d834e1 JB |
247 | if (vif) { |
248 | sdata = vif_to_sdata(vif); | |
bda3933a | 249 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
250 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
251 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
252 | } | |
c2d1560a JB |
253 | |
254 | /* Data frame duration */ | |
8318d78a | 255 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 256 | erp, short_preamble); |
e039fa4a | 257 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 258 | /* ACK duration */ |
8318d78a | 259 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
260 | erp, short_preamble); |
261 | } | |
262 | ||
263 | return cpu_to_le16(dur); | |
264 | } | |
265 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
266 | ||
ce7c9111 KV |
267 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
268 | enum queue_stop_reason reason) | |
c2d1560a JB |
269 | { |
270 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 271 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 272 | |
b5878a2d JB |
273 | trace_wake_queue(local, queue, reason); |
274 | ||
e4e72fb4 JB |
275 | if (WARN_ON(queue >= hw->queues)) |
276 | return; | |
ce7c9111 | 277 | |
96f5e66e JB |
278 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
279 | ||
280 | if (local->queue_stop_reasons[queue] != 0) | |
281 | /* someone still has this queue stopped */ | |
282 | return; | |
283 | ||
7236fe29 JB |
284 | if (skb_queue_empty(&local->pending[queue])) { |
285 | rcu_read_lock(); | |
5b714c6a JB |
286 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
287 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
288 | continue; | |
2337db8d | 289 | netif_wake_subqueue(sdata->dev, queue); |
5b714c6a | 290 | } |
7236fe29 JB |
291 | rcu_read_unlock(); |
292 | } else | |
3b8d81e0 | 293 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 294 | } |
ce7c9111 | 295 | |
96f5e66e JB |
296 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
297 | enum queue_stop_reason reason) | |
ce7c9111 KV |
298 | { |
299 | struct ieee80211_local *local = hw_to_local(hw); | |
300 | unsigned long flags; | |
301 | ||
302 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
303 | __ieee80211_wake_queue(hw, queue, reason); | |
304 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
305 | } | |
306 | ||
307 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
308 | { | |
309 | ieee80211_wake_queue_by_reason(hw, queue, | |
310 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
311 | } | |
c2d1560a JB |
312 | EXPORT_SYMBOL(ieee80211_wake_queue); |
313 | ||
ce7c9111 KV |
314 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
315 | enum queue_stop_reason reason) | |
c2d1560a JB |
316 | { |
317 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 318 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 319 | |
b5878a2d JB |
320 | trace_stop_queue(local, queue, reason); |
321 | ||
e4e72fb4 JB |
322 | if (WARN_ON(queue >= hw->queues)) |
323 | return; | |
96f5e66e | 324 | |
2a577d98 | 325 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 JB |
326 | |
327 | rcu_read_lock(); | |
328 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 329 | netif_stop_subqueue(sdata->dev, queue); |
cf0277e7 | 330 | rcu_read_unlock(); |
c2d1560a | 331 | } |
ce7c9111 | 332 | |
96f5e66e JB |
333 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
334 | enum queue_stop_reason reason) | |
ce7c9111 KV |
335 | { |
336 | struct ieee80211_local *local = hw_to_local(hw); | |
337 | unsigned long flags; | |
338 | ||
339 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
340 | __ieee80211_stop_queue(hw, queue, reason); | |
341 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
342 | } | |
343 | ||
344 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
345 | { | |
346 | ieee80211_stop_queue_by_reason(hw, queue, | |
347 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
348 | } | |
c2d1560a JB |
349 | EXPORT_SYMBOL(ieee80211_stop_queue); |
350 | ||
8f77f384 JB |
351 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
352 | struct sk_buff *skb) | |
353 | { | |
354 | struct ieee80211_hw *hw = &local->hw; | |
355 | unsigned long flags; | |
356 | int queue = skb_get_queue_mapping(skb); | |
a7bc376c JB |
357 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
358 | ||
359 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 360 | kfree_skb(skb); |
a7bc376c JB |
361 | return; |
362 | } | |
8f77f384 JB |
363 | |
364 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
365 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 366 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
367 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
368 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
369 | } | |
370 | ||
371 | int ieee80211_add_pending_skbs(struct ieee80211_local *local, | |
372 | struct sk_buff_head *skbs) | |
373 | { | |
374 | struct ieee80211_hw *hw = &local->hw; | |
375 | struct sk_buff *skb; | |
376 | unsigned long flags; | |
377 | int queue, ret = 0, i; | |
378 | ||
379 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
380 | for (i = 0; i < hw->queues; i++) | |
381 | __ieee80211_stop_queue(hw, i, | |
382 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
383 | ||
384 | while ((skb = skb_dequeue(skbs))) { | |
a7bc376c JB |
385 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
386 | ||
387 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 388 | kfree_skb(skb); |
a7bc376c JB |
389 | continue; |
390 | } | |
391 | ||
8f77f384 JB |
392 | ret++; |
393 | queue = skb_get_queue_mapping(skb); | |
3b8d81e0 | 394 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
395 | } |
396 | ||
3b8d81e0 | 397 | for (i = 0; i < hw->queues; i++) |
8f77f384 JB |
398 | __ieee80211_wake_queue(hw, i, |
399 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
8f77f384 JB |
400 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
401 | ||
402 | return ret; | |
403 | } | |
404 | ||
ce7c9111 KV |
405 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
406 | enum queue_stop_reason reason) | |
c2d1560a | 407 | { |
ce7c9111 KV |
408 | struct ieee80211_local *local = hw_to_local(hw); |
409 | unsigned long flags; | |
c2d1560a JB |
410 | int i; |
411 | ||
ce7c9111 KV |
412 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
413 | ||
96f5e66e | 414 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
415 | __ieee80211_stop_queue(hw, i, reason); |
416 | ||
417 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
418 | } | |
419 | ||
420 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
421 | { | |
422 | ieee80211_stop_queues_by_reason(hw, | |
423 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
424 | } |
425 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
426 | ||
92ab8535 TW |
427 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
428 | { | |
429 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
430 | unsigned long flags; |
431 | int ret; | |
96f5e66e | 432 | |
e4e72fb4 JB |
433 | if (WARN_ON(queue >= hw->queues)) |
434 | return true; | |
96f5e66e | 435 | |
3b8d81e0 JB |
436 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
437 | ret = !!local->queue_stop_reasons[queue]; | |
438 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
439 | return ret; | |
92ab8535 TW |
440 | } |
441 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
442 | ||
ce7c9111 KV |
443 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
444 | enum queue_stop_reason reason) | |
c2d1560a | 445 | { |
ce7c9111 KV |
446 | struct ieee80211_local *local = hw_to_local(hw); |
447 | unsigned long flags; | |
c2d1560a JB |
448 | int i; |
449 | ||
ce7c9111 KV |
450 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
451 | ||
e4e72fb4 | 452 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
453 | __ieee80211_wake_queue(hw, i, reason); |
454 | ||
455 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
456 | } | |
457 | ||
458 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
459 | { | |
460 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
461 | } |
462 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 463 | |
32bfd35d JB |
464 | void ieee80211_iterate_active_interfaces( |
465 | struct ieee80211_hw *hw, | |
466 | void (*iterator)(void *data, u8 *mac, | |
467 | struct ieee80211_vif *vif), | |
468 | void *data) | |
dabeb344 JB |
469 | { |
470 | struct ieee80211_local *local = hw_to_local(hw); | |
471 | struct ieee80211_sub_if_data *sdata; | |
472 | ||
c771c9d8 | 473 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
474 | |
475 | list_for_each_entry(sdata, &local->interfaces, list) { | |
476 | switch (sdata->vif.type) { | |
05c914fe JB |
477 | case NL80211_IFTYPE_MONITOR: |
478 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 479 | continue; |
2ca27bcf | 480 | default: |
2f561feb ID |
481 | break; |
482 | } | |
9607e6b6 | 483 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 484 | iterator(data, sdata->vif.addr, |
2f561feb ID |
485 | &sdata->vif); |
486 | } | |
487 | ||
c771c9d8 | 488 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
489 | } |
490 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
491 | ||
492 | void ieee80211_iterate_active_interfaces_atomic( | |
493 | struct ieee80211_hw *hw, | |
494 | void (*iterator)(void *data, u8 *mac, | |
495 | struct ieee80211_vif *vif), | |
496 | void *data) | |
497 | { | |
498 | struct ieee80211_local *local = hw_to_local(hw); | |
499 | struct ieee80211_sub_if_data *sdata; | |
500 | ||
e38bad47 | 501 | rcu_read_lock(); |
dabeb344 | 502 | |
e38bad47 | 503 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 504 | switch (sdata->vif.type) { |
05c914fe JB |
505 | case NL80211_IFTYPE_MONITOR: |
506 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 507 | continue; |
2ca27bcf | 508 | default: |
dabeb344 JB |
509 | break; |
510 | } | |
9607e6b6 | 511 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 512 | iterator(data, sdata->vif.addr, |
32bfd35d | 513 | &sdata->vif); |
dabeb344 | 514 | } |
e38bad47 JB |
515 | |
516 | rcu_read_unlock(); | |
dabeb344 | 517 | } |
2f561feb | 518 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 519 | |
42935eca LR |
520 | /* |
521 | * Nothing should have been stuffed into the workqueue during | |
522 | * the suspend->resume cycle. If this WARN is seen then there | |
523 | * is a bug with either the driver suspend or something in | |
524 | * mac80211 stuffing into the workqueue which we haven't yet | |
525 | * cleared during mac80211's suspend cycle. | |
526 | */ | |
527 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
528 | { | |
ceb99fe0 JB |
529 | if (WARN(local->suspended && !local->resuming, |
530 | "queueing ieee80211 work while going to suspend\n")) | |
531 | return false; | |
42935eca LR |
532 | |
533 | return true; | |
534 | } | |
535 | ||
536 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
537 | { | |
538 | struct ieee80211_local *local = hw_to_local(hw); | |
539 | ||
540 | if (!ieee80211_can_queue_work(local)) | |
541 | return; | |
542 | ||
543 | queue_work(local->workqueue, work); | |
544 | } | |
545 | EXPORT_SYMBOL(ieee80211_queue_work); | |
546 | ||
547 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
548 | struct delayed_work *dwork, | |
549 | unsigned long delay) | |
550 | { | |
551 | struct ieee80211_local *local = hw_to_local(hw); | |
552 | ||
553 | if (!ieee80211_can_queue_work(local)) | |
554 | return; | |
555 | ||
556 | queue_delayed_work(local->workqueue, dwork, delay); | |
557 | } | |
558 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
559 | ||
37ffc8da JB |
560 | void ieee802_11_parse_elems(u8 *start, size_t len, |
561 | struct ieee802_11_elems *elems) | |
d91f36db JB |
562 | { |
563 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
564 | } | |
565 | ||
566 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, | |
567 | struct ieee802_11_elems *elems, | |
568 | u64 filter, u32 crc) | |
37ffc8da JB |
569 | { |
570 | size_t left = len; | |
571 | u8 *pos = start; | |
d91f36db | 572 | bool calc_crc = filter != 0; |
37ffc8da JB |
573 | |
574 | memset(elems, 0, sizeof(*elems)); | |
575 | elems->ie_start = start; | |
576 | elems->total_len = len; | |
577 | ||
578 | while (left >= 2) { | |
579 | u8 id, elen; | |
580 | ||
581 | id = *pos++; | |
582 | elen = *pos++; | |
583 | left -= 2; | |
584 | ||
585 | if (elen > left) | |
d91f36db JB |
586 | break; |
587 | ||
1814077f | 588 | if (calc_crc && id < 64 && (filter & (1ULL << id))) |
d91f36db | 589 | crc = crc32_be(crc, pos - 2, elen + 2); |
37ffc8da JB |
590 | |
591 | switch (id) { | |
592 | case WLAN_EID_SSID: | |
593 | elems->ssid = pos; | |
594 | elems->ssid_len = elen; | |
595 | break; | |
596 | case WLAN_EID_SUPP_RATES: | |
597 | elems->supp_rates = pos; | |
598 | elems->supp_rates_len = elen; | |
599 | break; | |
600 | case WLAN_EID_FH_PARAMS: | |
601 | elems->fh_params = pos; | |
602 | elems->fh_params_len = elen; | |
603 | break; | |
604 | case WLAN_EID_DS_PARAMS: | |
605 | elems->ds_params = pos; | |
606 | elems->ds_params_len = elen; | |
607 | break; | |
608 | case WLAN_EID_CF_PARAMS: | |
609 | elems->cf_params = pos; | |
610 | elems->cf_params_len = elen; | |
611 | break; | |
612 | case WLAN_EID_TIM: | |
e7ec86f5 JB |
613 | if (elen >= sizeof(struct ieee80211_tim_ie)) { |
614 | elems->tim = (void *)pos; | |
615 | elems->tim_len = elen; | |
616 | } | |
37ffc8da JB |
617 | break; |
618 | case WLAN_EID_IBSS_PARAMS: | |
619 | elems->ibss_params = pos; | |
620 | elems->ibss_params_len = elen; | |
621 | break; | |
622 | case WLAN_EID_CHALLENGE: | |
623 | elems->challenge = pos; | |
624 | elems->challenge_len = elen; | |
625 | break; | |
d91f36db | 626 | case WLAN_EID_VENDOR_SPECIFIC: |
37ffc8da JB |
627 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
628 | pos[2] == 0xf2) { | |
629 | /* Microsoft OUI (00:50:F2) */ | |
d91f36db JB |
630 | |
631 | if (calc_crc) | |
632 | crc = crc32_be(crc, pos - 2, elen + 2); | |
633 | ||
37ffc8da JB |
634 | if (pos[3] == 1) { |
635 | /* OUI Type 1 - WPA IE */ | |
636 | elems->wpa = pos; | |
637 | elems->wpa_len = elen; | |
638 | } else if (elen >= 5 && pos[3] == 2) { | |
d91f36db | 639 | /* OUI Type 2 - WMM IE */ |
37ffc8da JB |
640 | if (pos[4] == 0) { |
641 | elems->wmm_info = pos; | |
642 | elems->wmm_info_len = elen; | |
643 | } else if (pos[4] == 1) { | |
644 | elems->wmm_param = pos; | |
645 | elems->wmm_param_len = elen; | |
646 | } | |
647 | } | |
648 | } | |
649 | break; | |
650 | case WLAN_EID_RSN: | |
651 | elems->rsn = pos; | |
652 | elems->rsn_len = elen; | |
653 | break; | |
654 | case WLAN_EID_ERP_INFO: | |
655 | elems->erp_info = pos; | |
656 | elems->erp_info_len = elen; | |
657 | break; | |
658 | case WLAN_EID_EXT_SUPP_RATES: | |
659 | elems->ext_supp_rates = pos; | |
660 | elems->ext_supp_rates_len = elen; | |
661 | break; | |
662 | case WLAN_EID_HT_CAPABILITY: | |
09914813 JB |
663 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
664 | elems->ht_cap_elem = (void *)pos; | |
37ffc8da | 665 | break; |
d9fe60de JB |
666 | case WLAN_EID_HT_INFORMATION: |
667 | if (elen >= sizeof(struct ieee80211_ht_info)) | |
09914813 | 668 | elems->ht_info_elem = (void *)pos; |
37ffc8da JB |
669 | break; |
670 | case WLAN_EID_MESH_ID: | |
671 | elems->mesh_id = pos; | |
672 | elems->mesh_id_len = elen; | |
673 | break; | |
674 | case WLAN_EID_MESH_CONFIG: | |
136cfa28 RP |
675 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) |
676 | elems->mesh_config = (void *)pos; | |
37ffc8da JB |
677 | break; |
678 | case WLAN_EID_PEER_LINK: | |
679 | elems->peer_link = pos; | |
680 | elems->peer_link_len = elen; | |
681 | break; | |
682 | case WLAN_EID_PREQ: | |
683 | elems->preq = pos; | |
684 | elems->preq_len = elen; | |
685 | break; | |
686 | case WLAN_EID_PREP: | |
687 | elems->prep = pos; | |
688 | elems->prep_len = elen; | |
689 | break; | |
690 | case WLAN_EID_PERR: | |
691 | elems->perr = pos; | |
692 | elems->perr_len = elen; | |
693 | break; | |
90a5e169 RP |
694 | case WLAN_EID_RANN: |
695 | if (elen >= sizeof(struct ieee80211_rann_ie)) | |
696 | elems->rann = (void *)pos; | |
697 | break; | |
37ffc8da JB |
698 | case WLAN_EID_CHANNEL_SWITCH: |
699 | elems->ch_switch_elem = pos; | |
700 | elems->ch_switch_elem_len = elen; | |
701 | break; | |
702 | case WLAN_EID_QUIET: | |
703 | if (!elems->quiet_elem) { | |
704 | elems->quiet_elem = pos; | |
705 | elems->quiet_elem_len = elen; | |
706 | } | |
707 | elems->num_of_quiet_elem++; | |
708 | break; | |
709 | case WLAN_EID_COUNTRY: | |
710 | elems->country_elem = pos; | |
711 | elems->country_elem_len = elen; | |
712 | break; | |
713 | case WLAN_EID_PWR_CONSTRAINT: | |
714 | elems->pwr_constr_elem = pos; | |
715 | elems->pwr_constr_elem_len = elen; | |
716 | break; | |
f797eb7e JM |
717 | case WLAN_EID_TIMEOUT_INTERVAL: |
718 | elems->timeout_int = pos; | |
719 | elems->timeout_int_len = elen; | |
63a5ab82 | 720 | break; |
37ffc8da JB |
721 | default: |
722 | break; | |
723 | } | |
724 | ||
725 | left -= elen; | |
726 | pos += elen; | |
727 | } | |
d91f36db JB |
728 | |
729 | return crc; | |
37ffc8da | 730 | } |
5825fe10 JB |
731 | |
732 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) | |
733 | { | |
734 | struct ieee80211_local *local = sdata->local; | |
735 | struct ieee80211_tx_queue_params qparam; | |
aa837e1d JB |
736 | int queue; |
737 | bool use_11b; | |
738 | int aCWmin, aCWmax; | |
5825fe10 JB |
739 | |
740 | if (!local->ops->conf_tx) | |
741 | return; | |
742 | ||
743 | memset(&qparam, 0, sizeof(qparam)); | |
744 | ||
aa837e1d JB |
745 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
746 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 747 | |
aa837e1d JB |
748 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
749 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
750 | aCWmax = 1023; | |
751 | if (use_11b) | |
752 | aCWmin = 31; | |
753 | else | |
754 | aCWmin = 15; | |
755 | ||
756 | switch (queue) { | |
757 | case 3: /* AC_BK */ | |
7ba10a8e JB |
758 | qparam.cw_max = aCWmax; |
759 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
760 | qparam.txop = 0; |
761 | qparam.aifs = 7; | |
762 | break; | |
763 | default: /* never happens but let's not leave undefined */ | |
764 | case 2: /* AC_BE */ | |
7ba10a8e JB |
765 | qparam.cw_max = aCWmax; |
766 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
767 | qparam.txop = 0; |
768 | qparam.aifs = 3; | |
769 | break; | |
770 | case 1: /* AC_VI */ | |
771 | qparam.cw_max = aCWmin; | |
772 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
773 | if (use_11b) | |
774 | qparam.txop = 6016/32; | |
775 | else | |
776 | qparam.txop = 3008/32; | |
777 | qparam.aifs = 2; | |
778 | break; | |
779 | case 0: /* AC_VO */ | |
780 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
781 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
782 | if (use_11b) | |
783 | qparam.txop = 3264/32; | |
784 | else | |
785 | qparam.txop = 1504/32; | |
786 | qparam.aifs = 2; | |
787 | break; | |
788 | } | |
5825fe10 | 789 | |
ab13315a KV |
790 | qparam.uapsd = false; |
791 | ||
aa837e1d JB |
792 | drv_conf_tx(local, queue, &qparam); |
793 | } | |
e1b3ec1a SG |
794 | |
795 | /* after reinitialize QoS TX queues setting to default, | |
796 | * disable QoS at all */ | |
d9734979 S |
797 | |
798 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) { | |
799 | sdata->vif.bss_conf.qos = | |
800 | sdata->vif.type != NL80211_IFTYPE_STATION; | |
801 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); | |
802 | } | |
5825fe10 | 803 | } |
e50db65c | 804 | |
46900298 JB |
805 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
806 | const size_t supp_rates_len, | |
807 | const u8 *supp_rates) | |
808 | { | |
809 | struct ieee80211_local *local = sdata->local; | |
810 | int i, have_higher_than_11mbit = 0; | |
811 | ||
812 | /* cf. IEEE 802.11 9.2.12 */ | |
813 | for (i = 0; i < supp_rates_len; i++) | |
814 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
815 | have_higher_than_11mbit = 1; | |
816 | ||
817 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
818 | have_higher_than_11mbit) | |
819 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
820 | else | |
821 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
822 | ||
823 | ieee80211_set_wmm_default(sdata); | |
824 | } | |
825 | ||
881d948c | 826 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
827 | enum ieee80211_band band) |
828 | { | |
829 | struct ieee80211_supported_band *sband; | |
830 | struct ieee80211_rate *bitrates; | |
881d948c | 831 | u32 mandatory_rates; |
96dd22ac JB |
832 | enum ieee80211_rate_flags mandatory_flag; |
833 | int i; | |
834 | ||
835 | sband = local->hw.wiphy->bands[band]; | |
836 | if (!sband) { | |
837 | WARN_ON(1); | |
838 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
839 | } | |
840 | ||
841 | if (band == IEEE80211_BAND_2GHZ) | |
842 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
843 | else | |
844 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
845 | ||
846 | bitrates = sband->bitrates; | |
847 | mandatory_rates = 0; | |
848 | for (i = 0; i < sband->n_bitrates; i++) | |
849 | if (bitrates[i].flags & mandatory_flag) | |
850 | mandatory_rates |= BIT(i); | |
851 | return mandatory_rates; | |
852 | } | |
46900298 JB |
853 | |
854 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
855 | u16 transaction, u16 auth_alg, | |
fffd0934 JB |
856 | u8 *extra, size_t extra_len, const u8 *bssid, |
857 | const u8 *key, u8 key_len, u8 key_idx) | |
46900298 JB |
858 | { |
859 | struct ieee80211_local *local = sdata->local; | |
860 | struct sk_buff *skb; | |
861 | struct ieee80211_mgmt *mgmt; | |
fffd0934 | 862 | int err; |
46900298 JB |
863 | |
864 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 865 | sizeof(*mgmt) + 6 + extra_len); |
46900298 JB |
866 | if (!skb) { |
867 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
47846c9b | 868 | "frame\n", sdata->name); |
46900298 JB |
869 | return; |
870 | } | |
871 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
872 | ||
873 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
874 | memset(mgmt, 0, 24 + 6); | |
875 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
876 | IEEE80211_STYPE_AUTH); | |
46900298 | 877 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 878 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
879 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
880 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
881 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
882 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
883 | if (extra) | |
884 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 885 | |
fffd0934 JB |
886 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
887 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
888 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
889 | WARN_ON(err); | |
890 | } | |
891 | ||
62ae67be JB |
892 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
893 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
894 | } |
895 | ||
de95a54b | 896 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 897 | const u8 *ie, size_t ie_len, |
651b5225 JM |
898 | enum ieee80211_band band, u32 rate_mask, |
899 | u8 channel) | |
de95a54b JB |
900 | { |
901 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
902 | u8 *pos; |
903 | size_t offset = 0, noffset; | |
904 | int supp_rates_len, i; | |
8dcb2003 JM |
905 | u8 rates[32]; |
906 | int num_rates; | |
907 | int ext_rates_len; | |
de95a54b | 908 | |
4d36ec58 | 909 | sband = local->hw.wiphy->bands[band]; |
de95a54b JB |
910 | |
911 | pos = buffer; | |
912 | ||
8dcb2003 JM |
913 | num_rates = 0; |
914 | for (i = 0; i < sband->n_bitrates; i++) { | |
915 | if ((BIT(i) & rate_mask) == 0) | |
916 | continue; /* skip rate */ | |
917 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
918 | } | |
919 | ||
920 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 921 | |
de95a54b | 922 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 923 | *pos++ = supp_rates_len; |
8dcb2003 JM |
924 | memcpy(pos, rates, supp_rates_len); |
925 | pos += supp_rates_len; | |
8e664fb3 JB |
926 | |
927 | /* insert "request information" if in custom IEs */ | |
928 | if (ie && ie_len) { | |
929 | static const u8 before_extrates[] = { | |
930 | WLAN_EID_SSID, | |
931 | WLAN_EID_SUPP_RATES, | |
932 | WLAN_EID_REQUEST, | |
933 | }; | |
934 | noffset = ieee80211_ie_split(ie, ie_len, | |
935 | before_extrates, | |
936 | ARRAY_SIZE(before_extrates), | |
937 | offset); | |
938 | memcpy(pos, ie + offset, noffset - offset); | |
939 | pos += noffset - offset; | |
940 | offset = noffset; | |
941 | } | |
942 | ||
8dcb2003 JM |
943 | ext_rates_len = num_rates - supp_rates_len; |
944 | if (ext_rates_len > 0) { | |
8e664fb3 | 945 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
946 | *pos++ = ext_rates_len; |
947 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
948 | pos += ext_rates_len; | |
8e664fb3 JB |
949 | } |
950 | ||
651b5225 JM |
951 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
952 | *pos++ = WLAN_EID_DS_PARAMS; | |
953 | *pos++ = 1; | |
954 | *pos++ = channel; | |
955 | } | |
956 | ||
8e664fb3 JB |
957 | /* insert custom IEs that go before HT */ |
958 | if (ie && ie_len) { | |
959 | static const u8 before_ht[] = { | |
960 | WLAN_EID_SSID, | |
961 | WLAN_EID_SUPP_RATES, | |
962 | WLAN_EID_REQUEST, | |
963 | WLAN_EID_EXT_SUPP_RATES, | |
964 | WLAN_EID_DS_PARAMS, | |
965 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
966 | }; | |
967 | noffset = ieee80211_ie_split(ie, ie_len, | |
968 | before_ht, ARRAY_SIZE(before_ht), | |
969 | offset); | |
970 | memcpy(pos, ie + offset, noffset - offset); | |
971 | pos += noffset - offset; | |
972 | offset = noffset; | |
de95a54b JB |
973 | } |
974 | ||
5ef2d41a | 975 | if (sband->ht_cap.ht_supported) { |
f38fd12f JB |
976 | u16 cap = sband->ht_cap.cap; |
977 | __le16 tmp; | |
978 | ||
979 | if (ieee80211_disable_40mhz_24ghz && | |
980 | sband->band == IEEE80211_BAND_2GHZ) { | |
981 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
982 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
983 | } | |
5ef2d41a JB |
984 | |
985 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
986 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
987 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
f38fd12f | 988 | tmp = cpu_to_le16(cap); |
5ef2d41a JB |
989 | memcpy(pos, &tmp, sizeof(u16)); |
990 | pos += sizeof(u16); | |
5ef2d41a | 991 | *pos++ = sband->ht_cap.ampdu_factor | |
f38fd12f JB |
992 | (sband->ht_cap.ampdu_density << |
993 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); | |
5ef2d41a JB |
994 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); |
995 | pos += sizeof(sband->ht_cap.mcs); | |
996 | pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ | |
997 | } | |
998 | ||
de95a54b JB |
999 | /* |
1000 | * If adding more here, adjust code in main.c | |
1001 | * that calculates local->scan_ies_len. | |
1002 | */ | |
1003 | ||
8e664fb3 JB |
1004 | /* add any remaining custom IEs */ |
1005 | if (ie && ie_len) { | |
1006 | noffset = ie_len; | |
1007 | memcpy(pos, ie + offset, noffset - offset); | |
1008 | pos += noffset - offset; | |
de95a54b JB |
1009 | } |
1010 | ||
1011 | return pos - buffer; | |
1012 | } | |
1013 | ||
46900298 | 1014 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
de95a54b JB |
1015 | const u8 *ssid, size_t ssid_len, |
1016 | const u8 *ie, size_t ie_len) | |
46900298 JB |
1017 | { |
1018 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
1019 | struct sk_buff *skb; |
1020 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
1021 | size_t buf_len; |
1022 | u8 *buf; | |
651b5225 | 1023 | u8 chan; |
7c12ce8b KV |
1024 | |
1025 | /* FIXME: come up with a proper value */ | |
1026 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
1027 | if (!buf) { | |
1028 | printk(KERN_DEBUG "%s: failed to allocate temporary IE " | |
1029 | "buffer\n", sdata->name); | |
46900298 JB |
1030 | return; |
1031 | } | |
46900298 | 1032 | |
651b5225 JM |
1033 | chan = ieee80211_frequency_to_channel( |
1034 | local->hw.conf.channel->center_freq); | |
1035 | ||
7c12ce8b | 1036 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
8dcb2003 JM |
1037 | local->hw.conf.channel->band, |
1038 | sdata->rc_rateidx_mask | |
651b5225 JM |
1039 | [local->hw.conf.channel->band], |
1040 | chan); | |
7c12ce8b KV |
1041 | |
1042 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
1043 | ssid, ssid_len, | |
1044 | buf, buf_len); | |
1045 | ||
46900298 | 1046 | if (dst) { |
7c12ce8b | 1047 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
1048 | memcpy(mgmt->da, dst, ETH_ALEN); |
1049 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 1050 | } |
46900298 | 1051 | |
62ae67be JB |
1052 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1053 | ieee80211_tx_skb(sdata, skb); | |
145b6d1a | 1054 | kfree(buf); |
46900298 JB |
1055 | } |
1056 | ||
1057 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
1058 | struct ieee802_11_elems *elems, | |
1059 | enum ieee80211_band band) | |
1060 | { | |
1061 | struct ieee80211_supported_band *sband; | |
1062 | struct ieee80211_rate *bitrates; | |
1063 | size_t num_rates; | |
1064 | u32 supp_rates; | |
1065 | int i, j; | |
1066 | sband = local->hw.wiphy->bands[band]; | |
1067 | ||
1068 | if (!sband) { | |
1069 | WARN_ON(1); | |
1070 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1071 | } | |
1072 | ||
1073 | bitrates = sband->bitrates; | |
1074 | num_rates = sband->n_bitrates; | |
1075 | supp_rates = 0; | |
1076 | for (i = 0; i < elems->supp_rates_len + | |
1077 | elems->ext_supp_rates_len; i++) { | |
1078 | u8 rate = 0; | |
1079 | int own_rate; | |
1080 | if (i < elems->supp_rates_len) | |
1081 | rate = elems->supp_rates[i]; | |
1082 | else if (elems->ext_supp_rates) | |
1083 | rate = elems->ext_supp_rates | |
1084 | [i - elems->supp_rates_len]; | |
1085 | own_rate = 5 * (rate & 0x7f); | |
1086 | for (j = 0; j < num_rates; j++) | |
1087 | if (bitrates[j].bitrate == own_rate) | |
1088 | supp_rates |= BIT(j); | |
1089 | } | |
1090 | return supp_rates; | |
1091 | } | |
f2753ddb | 1092 | |
84f6a01c JB |
1093 | void ieee80211_stop_device(struct ieee80211_local *local) |
1094 | { | |
1095 | ieee80211_led_radio(local, false); | |
1096 | ||
1097 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
1098 | |
1099 | flush_workqueue(local->workqueue); | |
678f415f | 1100 | drv_stop(local); |
84f6a01c JB |
1101 | } |
1102 | ||
f2753ddb JB |
1103 | int ieee80211_reconfig(struct ieee80211_local *local) |
1104 | { | |
1105 | struct ieee80211_hw *hw = &local->hw; | |
1106 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 1107 | struct sta_info *sta; |
f2753ddb | 1108 | int res; |
5bb644a0 | 1109 | |
ceb99fe0 JB |
1110 | if (local->suspended) |
1111 | local->resuming = true; | |
f2753ddb JB |
1112 | |
1113 | /* restart hardware */ | |
1114 | if (local->open_count) { | |
24feda00 LR |
1115 | /* |
1116 | * Upon resume hardware can sometimes be goofy due to | |
1117 | * various platform / driver / bus issues, so restarting | |
1118 | * the device may at times not work immediately. Propagate | |
1119 | * the error. | |
1120 | */ | |
24487981 | 1121 | res = drv_start(local); |
24feda00 | 1122 | if (res) { |
c7a00dc7 JL |
1123 | WARN(local->suspended, "Hardware became unavailable " |
1124 | "upon resume. This could be a software issue " | |
1125 | "prior to suspend or a hardware issue.\n"); | |
24feda00 LR |
1126 | return res; |
1127 | } | |
f2753ddb | 1128 | |
1f87f7d3 | 1129 | ieee80211_led_radio(local, true); |
f2753ddb JB |
1130 | } |
1131 | ||
1132 | /* add interfaces */ | |
1133 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1134 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1135 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f JB |
1136 | ieee80211_sdata_running(sdata)) |
1137 | res = drv_add_interface(local, &sdata->vif); | |
f2753ddb JB |
1138 | } |
1139 | ||
1140 | /* add STAs back */ | |
34e89507 JB |
1141 | mutex_lock(&local->sta_mtx); |
1142 | list_for_each_entry(sta, &local->sta_list, list) { | |
1143 | if (sta->uploaded) { | |
5bb644a0 | 1144 | sdata = sta->sdata; |
f2753ddb JB |
1145 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1146 | sdata = container_of(sdata->bss, | |
1147 | struct ieee80211_sub_if_data, | |
1148 | u.ap); | |
1149 | ||
34e89507 | 1150 | WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
f2753ddb | 1151 | } |
f2753ddb | 1152 | } |
34e89507 | 1153 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1154 | |
f2753ddb | 1155 | /* setup RTS threshold */ |
24487981 | 1156 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
f2753ddb JB |
1157 | |
1158 | /* reconfigure hardware */ | |
1159 | ieee80211_hw_config(local, ~0); | |
1160 | ||
f2753ddb | 1161 | ieee80211_configure_filter(local); |
f2753ddb JB |
1162 | |
1163 | /* Finally also reconfigure all the BSS information */ | |
1164 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1165 | u32 changed; |
1166 | ||
9607e6b6 | 1167 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1168 | continue; |
ac8dd506 JB |
1169 | |
1170 | /* common change flags for all interface types */ | |
1171 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1172 | BSS_CHANGED_ERP_PREAMBLE | | |
1173 | BSS_CHANGED_ERP_SLOT | | |
1174 | BSS_CHANGED_HT | | |
1175 | BSS_CHANGED_BASIC_RATES | | |
1176 | BSS_CHANGED_BEACON_INT | | |
1177 | BSS_CHANGED_BSSID | | |
4ced3f74 JB |
1178 | BSS_CHANGED_CQM | |
1179 | BSS_CHANGED_QOS; | |
ac8dd506 | 1180 | |
f2753ddb JB |
1181 | switch (sdata->vif.type) { |
1182 | case NL80211_IFTYPE_STATION: | |
ac8dd506 JB |
1183 | changed |= BSS_CHANGED_ASSOC; |
1184 | ieee80211_bss_info_change_notify(sdata, changed); | |
1185 | break; | |
f2753ddb | 1186 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1187 | changed |= BSS_CHANGED_IBSS; |
1188 | /* fall through */ | |
f2753ddb JB |
1189 | case NL80211_IFTYPE_AP: |
1190 | case NL80211_IFTYPE_MESH_POINT: | |
ac8dd506 JB |
1191 | changed |= BSS_CHANGED_BEACON | |
1192 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1193 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1194 | break; |
1195 | case NL80211_IFTYPE_WDS: | |
1196 | break; | |
1197 | case NL80211_IFTYPE_AP_VLAN: | |
1198 | case NL80211_IFTYPE_MONITOR: | |
1199 | /* ignore virtual */ | |
1200 | break; | |
1201 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1202 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1203 | case NL80211_IFTYPE_P2P_CLIENT: |
1204 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1205 | WARN_ON(1); |
1206 | break; | |
1207 | } | |
1208 | } | |
1209 | ||
2a419056 JB |
1210 | /* |
1211 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1212 | * sessions can be established after a resume. | |
1213 | * | |
1214 | * Also tear down aggregation sessions since reconfiguring | |
1215 | * them in a hardware restart scenario is not easily done | |
1216 | * right now, and the hardware will have lost information | |
1217 | * about the sessions, but we and the AP still think they | |
1218 | * are active. This is really a workaround though. | |
1219 | */ | |
74e2bd1f | 1220 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1221 | mutex_lock(&local->sta_mtx); |
1222 | ||
1223 | list_for_each_entry(sta, &local->sta_list, list) { | |
74e2bd1f | 1224 | ieee80211_sta_tear_down_BA_sessions(sta); |
2a419056 | 1225 | clear_sta_flags(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1226 | } |
2a419056 JB |
1227 | |
1228 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1229 | } |
74e2bd1f | 1230 | |
f2753ddb JB |
1231 | /* add back keys */ |
1232 | list_for_each_entry(sdata, &local->interfaces, list) | |
9607e6b6 | 1233 | if (ieee80211_sdata_running(sdata)) |
f2753ddb JB |
1234 | ieee80211_enable_keys(sdata); |
1235 | ||
1236 | ieee80211_wake_queues_by_reason(hw, | |
1237 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1238 | ||
5bb644a0 JB |
1239 | /* |
1240 | * If this is for hw restart things are still running. | |
1241 | * We may want to change that later, however. | |
1242 | */ | |
ceb99fe0 | 1243 | if (!local->suspended) |
5bb644a0 JB |
1244 | return 0; |
1245 | ||
1246 | #ifdef CONFIG_PM | |
ceb99fe0 | 1247 | /* first set suspended false, then resuming */ |
5bb644a0 | 1248 | local->suspended = false; |
ceb99fe0 JB |
1249 | mb(); |
1250 | local->resuming = false; | |
5bb644a0 JB |
1251 | |
1252 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1253 | switch(sdata->vif.type) { | |
1254 | case NL80211_IFTYPE_STATION: | |
1255 | ieee80211_sta_restart(sdata); | |
1256 | break; | |
1257 | case NL80211_IFTYPE_ADHOC: | |
1258 | ieee80211_ibss_restart(sdata); | |
1259 | break; | |
1260 | case NL80211_IFTYPE_MESH_POINT: | |
1261 | ieee80211_mesh_restart(sdata); | |
1262 | break; | |
1263 | default: | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | add_timer(&local->sta_cleanup); | |
1269 | ||
34e89507 | 1270 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1271 | list_for_each_entry(sta, &local->sta_list, list) |
1272 | mesh_plink_restart(sta); | |
34e89507 | 1273 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1274 | #else |
1275 | WARN_ON(1); | |
1276 | #endif | |
f2753ddb JB |
1277 | return 0; |
1278 | } | |
42935eca | 1279 | |
0f78231b JB |
1280 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1281 | enum ieee80211_smps_mode *smps_mode) | |
1282 | { | |
1283 | if (ifmgd->associated) { | |
1284 | *smps_mode = ifmgd->ap_smps; | |
1285 | ||
1286 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1287 | if (ifmgd->powersave) | |
1288 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1289 | else | |
1290 | *smps_mode = IEEE80211_SMPS_OFF; | |
1291 | } | |
1292 | ||
1293 | return 1; | |
1294 | } | |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /* must hold iflist_mtx */ | |
1300 | void ieee80211_recalc_smps(struct ieee80211_local *local, | |
1301 | struct ieee80211_sub_if_data *forsdata) | |
1302 | { | |
1303 | struct ieee80211_sub_if_data *sdata; | |
1304 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1305 | int count = 0; | |
1306 | ||
1307 | if (forsdata) | |
46a5ebaf | 1308 | lockdep_assert_held(&forsdata->u.mgd.mtx); |
0f78231b | 1309 | |
46a5ebaf | 1310 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1311 | |
1312 | /* | |
1313 | * This function could be improved to handle multiple | |
1314 | * interfaces better, but right now it makes any | |
1315 | * non-station interfaces force SM PS to be turned | |
1316 | * off. If there are multiple station interfaces it | |
1317 | * could also use the best possible mode, e.g. if | |
1318 | * one is in static and the other in dynamic then | |
1319 | * dynamic is ok. | |
1320 | */ | |
1321 | ||
1322 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1323 | if (!ieee80211_sdata_running(sdata)) |
0f78231b JB |
1324 | continue; |
1325 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1326 | goto set; | |
1327 | if (sdata != forsdata) { | |
1328 | /* | |
1329 | * This nested is ok -- we are holding the iflist_mtx | |
1330 | * so can't get here twice or so. But it's required | |
1331 | * since normally we acquire it first and then the | |
1332 | * iflist_mtx. | |
1333 | */ | |
1334 | mutex_lock_nested(&sdata->u.mgd.mtx, SINGLE_DEPTH_NESTING); | |
1335 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
1336 | mutex_unlock(&sdata->u.mgd.mtx); | |
1337 | } else | |
1338 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
1339 | ||
1340 | if (count > 1) { | |
1341 | smps_mode = IEEE80211_SMPS_OFF; | |
1342 | break; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | if (smps_mode == local->smps_mode) | |
1347 | return; | |
1348 | ||
1349 | set: | |
1350 | local->smps_mode = smps_mode; | |
1351 | /* changed flag is auto-detected for this */ | |
1352 | ieee80211_hw_config(local, 0); | |
1353 | } | |
8e664fb3 JB |
1354 | |
1355 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1356 | { | |
1357 | int i; | |
1358 | ||
1359 | for (i = 0; i < n_ids; i++) | |
1360 | if (ids[i] == id) | |
1361 | return true; | |
1362 | return false; | |
1363 | } | |
1364 | ||
1365 | /** | |
1366 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1367 | * | |
1368 | * @ies: the IE buffer | |
1369 | * @ielen: the length of the IE buffer | |
1370 | * @ids: an array with element IDs that are allowed before | |
1371 | * the split | |
1372 | * @n_ids: the size of the element ID array | |
1373 | * @offset: offset where to start splitting in the buffer | |
1374 | * | |
1375 | * This function splits an IE buffer by updating the @offset | |
1376 | * variable to point to the location where the buffer should be | |
1377 | * split. | |
1378 | * | |
1379 | * It assumes that the given IE buffer is well-formed, this | |
1380 | * has to be guaranteed by the caller! | |
1381 | * | |
1382 | * It also assumes that the IEs in the buffer are ordered | |
1383 | * correctly, if not the result of using this function will not | |
1384 | * be ordered correctly either, i.e. it does no reordering. | |
1385 | * | |
1386 | * The function returns the offset where the next part of the | |
1387 | * buffer starts, which may be @ielen if the entire (remainder) | |
1388 | * of the buffer should be used. | |
1389 | */ | |
1390 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1391 | const u8 *ids, int n_ids, size_t offset) | |
1392 | { | |
1393 | size_t pos = offset; | |
1394 | ||
1395 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1396 | pos += 2 + ies[pos + 1]; | |
1397 | ||
1398 | return pos; | |
1399 | } | |
1400 | ||
1401 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1402 | { | |
1403 | size_t pos = offset; | |
1404 | ||
1405 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1406 | pos += 2 + ies[pos + 1]; | |
1407 | ||
1408 | return pos; | |
1409 | } |