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