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Commit | Line | Data |
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c2d1560a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * utilities for mac80211 | |
12 | */ | |
13 | ||
14 | #include <net/mac80211.h> | |
15 | #include <linux/netdevice.h> | |
bc3b2d7f | 16 | #include <linux/export.h> |
c2d1560a JB |
17 | #include <linux/types.h> |
18 | #include <linux/slab.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/if_arp.h> | |
c2d1560a | 22 | #include <linux/bitmap.h> |
dd76986b | 23 | #include <linux/crc32.h> |
881d966b | 24 | #include <net/net_namespace.h> |
c2d1560a | 25 | #include <net/cfg80211.h> |
dabeb344 | 26 | #include <net/rtnetlink.h> |
c2d1560a JB |
27 | |
28 | #include "ieee80211_i.h" | |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "rate.h" |
ee385855 | 31 | #include "mesh.h" |
c2d1560a | 32 | #include "wme.h" |
f2753ddb | 33 | #include "led.h" |
fffd0934 | 34 | #include "wep.h" |
c2d1560a JB |
35 | |
36 | /* privid for wiphys to determine whether they belong to us or not */ | |
37 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
38 | ||
9a95371a LR |
39 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
40 | { | |
41 | struct ieee80211_local *local; | |
42 | BUG_ON(!wiphy); | |
43 | ||
44 | local = wiphy_priv(wiphy); | |
45 | return &local->hw; | |
46 | } | |
47 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 48 | |
71364716 | 49 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 50 | enum nl80211_iftype type) |
c2d1560a | 51 | { |
a494bb1c | 52 | __le16 fc = hdr->frame_control; |
c2d1560a | 53 | |
98f0b0a3 RR |
54 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
55 | if (len < 16) | |
c2d1560a JB |
56 | return NULL; |
57 | ||
a494bb1c | 58 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
59 | if (len < 24) /* drop incorrect hdr len (data) */ |
60 | return NULL; | |
a494bb1c HH |
61 | |
62 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 63 | return NULL; |
a494bb1c HH |
64 | if (ieee80211_has_tods(fc)) |
65 | return hdr->addr1; | |
66 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 67 | return hdr->addr2; |
a494bb1c HH |
68 | |
69 | return hdr->addr3; | |
70 | } | |
71 | ||
72 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
73 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
74 | return NULL; | |
c2d1560a | 75 | return hdr->addr3; |
a494bb1c HH |
76 | } |
77 | ||
78 | if (ieee80211_is_ctl(fc)) { | |
79 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 80 | return hdr->addr1; |
a494bb1c HH |
81 | |
82 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 83 | switch (type) { |
05c914fe | 84 | case NL80211_IFTYPE_STATION: |
71364716 | 85 | return hdr->addr2; |
05c914fe JB |
86 | case NL80211_IFTYPE_AP: |
87 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
88 | return hdr->addr1; |
89 | default: | |
a494bb1c | 90 | break; /* fall through to the return */ |
71364716 RR |
91 | } |
92 | } | |
c2d1560a JB |
93 | } |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
5cf121c3 | 98 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 99 | { |
252b86c4 | 100 | struct sk_buff *skb; |
2de8e0d9 JB |
101 | struct ieee80211_hdr *hdr; |
102 | ||
252b86c4 | 103 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 JB |
104 | hdr = (struct ieee80211_hdr *) skb->data; |
105 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
252b86c4 | 106 | } |
c2d1560a JB |
107 | } |
108 | ||
109 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
110 | int rate, int erp, int short_preamble) | |
111 | { | |
112 | int dur; | |
113 | ||
114 | /* calculate duration (in microseconds, rounded up to next higher | |
115 | * integer if it includes a fractional microsecond) to send frame of | |
116 | * len bytes (does not include FCS) at the given rate. Duration will | |
117 | * also include SIFS. | |
118 | * | |
119 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
120 | * DIV_ROUND_UP() operations. | |
121 | */ | |
122 | ||
8318d78a | 123 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
124 | /* |
125 | * OFDM: | |
126 | * | |
127 | * N_DBPS = DATARATE x 4 | |
128 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
129 | * (16 = SIGNAL time, 6 = tail bits) | |
130 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
131 | * | |
132 | * T_SYM = 4 usec | |
133 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
134 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
135 | * signal ext = 6 usec | |
136 | */ | |
c2d1560a JB |
137 | dur = 16; /* SIFS + signal ext */ |
138 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
139 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
140 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
141 | 4 * rate); /* T_SYM x N_SYM */ | |
142 | } else { | |
143 | /* | |
144 | * 802.11b or 802.11g with 802.11b compatibility: | |
145 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
146 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
147 | * | |
148 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
149 | * aSIFSTime = 10 usec | |
150 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
151 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
152 | */ | |
153 | dur = 10; /* aSIFSTime = 10 usec */ | |
154 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
155 | ||
156 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
157 | } | |
158 | ||
159 | return dur; | |
160 | } | |
161 | ||
162 | /* Exported duration function for driver use */ | |
32bfd35d JB |
163 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
164 | struct ieee80211_vif *vif, | |
8318d78a JB |
165 | size_t frame_len, |
166 | struct ieee80211_rate *rate) | |
c2d1560a JB |
167 | { |
168 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 169 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
170 | u16 dur; |
171 | int erp; | |
25d834e1 | 172 | bool short_preamble = false; |
c2d1560a | 173 | |
8318d78a | 174 | erp = 0; |
25d834e1 JB |
175 | if (vif) { |
176 | sdata = vif_to_sdata(vif); | |
bda3933a | 177 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
178 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
179 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
180 | } | |
8318d78a JB |
181 | |
182 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 183 | short_preamble); |
c2d1560a JB |
184 | |
185 | return cpu_to_le16(dur); | |
186 | } | |
187 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
188 | ||
32bfd35d JB |
189 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
190 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 191 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
192 | { |
193 | struct ieee80211_local *local = hw_to_local(hw); | |
194 | struct ieee80211_rate *rate; | |
25d834e1 | 195 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 196 | bool short_preamble; |
c2d1560a JB |
197 | int erp; |
198 | u16 dur; | |
2e92e6f2 JB |
199 | struct ieee80211_supported_band *sband; |
200 | ||
201 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 202 | |
25d834e1 | 203 | short_preamble = false; |
7e9ed188 | 204 | |
e039fa4a | 205 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
206 | |
207 | erp = 0; | |
25d834e1 JB |
208 | if (vif) { |
209 | sdata = vif_to_sdata(vif); | |
bda3933a | 210 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
211 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
212 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
213 | } | |
c2d1560a JB |
214 | |
215 | /* CTS duration */ | |
8318d78a | 216 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
217 | erp, short_preamble); |
218 | /* Data frame duration */ | |
8318d78a | 219 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
220 | erp, short_preamble); |
221 | /* ACK duration */ | |
8318d78a | 222 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
223 | erp, short_preamble); |
224 | ||
225 | return cpu_to_le16(dur); | |
226 | } | |
227 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
228 | ||
32bfd35d JB |
229 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
230 | struct ieee80211_vif *vif, | |
c2d1560a | 231 | size_t frame_len, |
e039fa4a | 232 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
233 | { |
234 | struct ieee80211_local *local = hw_to_local(hw); | |
235 | struct ieee80211_rate *rate; | |
25d834e1 | 236 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 237 | bool short_preamble; |
c2d1560a JB |
238 | int erp; |
239 | u16 dur; | |
2e92e6f2 JB |
240 | struct ieee80211_supported_band *sband; |
241 | ||
242 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 243 | |
25d834e1 | 244 | short_preamble = false; |
7e9ed188 | 245 | |
e039fa4a | 246 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 247 | erp = 0; |
25d834e1 JB |
248 | if (vif) { |
249 | sdata = vif_to_sdata(vif); | |
bda3933a | 250 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
251 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
252 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
253 | } | |
c2d1560a JB |
254 | |
255 | /* Data frame duration */ | |
8318d78a | 256 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 257 | erp, short_preamble); |
e039fa4a | 258 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 259 | /* ACK duration */ |
8318d78a | 260 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
261 | erp, short_preamble); |
262 | } | |
263 | ||
264 | return cpu_to_le16(dur); | |
265 | } | |
266 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
267 | ||
ce7c9111 KV |
268 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
269 | enum queue_stop_reason reason) | |
c2d1560a JB |
270 | { |
271 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 272 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 273 | |
b5878a2d JB |
274 | trace_wake_queue(local, queue, reason); |
275 | ||
e4e72fb4 JB |
276 | if (WARN_ON(queue >= hw->queues)) |
277 | return; | |
ce7c9111 | 278 | |
96f5e66e JB |
279 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
280 | ||
281 | if (local->queue_stop_reasons[queue] != 0) | |
282 | /* someone still has this queue stopped */ | |
283 | return; | |
284 | ||
7236fe29 JB |
285 | if (skb_queue_empty(&local->pending[queue])) { |
286 | rcu_read_lock(); | |
5b714c6a JB |
287 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
288 | if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
289 | continue; | |
2337db8d | 290 | netif_wake_subqueue(sdata->dev, queue); |
5b714c6a | 291 | } |
7236fe29 JB |
292 | rcu_read_unlock(); |
293 | } else | |
3b8d81e0 | 294 | tasklet_schedule(&local->tx_pending_tasklet); |
c2d1560a | 295 | } |
ce7c9111 | 296 | |
96f5e66e JB |
297 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
298 | enum queue_stop_reason reason) | |
ce7c9111 KV |
299 | { |
300 | struct ieee80211_local *local = hw_to_local(hw); | |
301 | unsigned long flags; | |
302 | ||
303 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
304 | __ieee80211_wake_queue(hw, queue, reason); | |
305 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
306 | } | |
307 | ||
308 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
309 | { | |
310 | ieee80211_wake_queue_by_reason(hw, queue, | |
311 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
312 | } | |
c2d1560a JB |
313 | EXPORT_SYMBOL(ieee80211_wake_queue); |
314 | ||
ce7c9111 KV |
315 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
316 | enum queue_stop_reason reason) | |
c2d1560a JB |
317 | { |
318 | struct ieee80211_local *local = hw_to_local(hw); | |
cf0277e7 | 319 | struct ieee80211_sub_if_data *sdata; |
c2d1560a | 320 | |
b5878a2d JB |
321 | trace_stop_queue(local, queue, reason); |
322 | ||
e4e72fb4 JB |
323 | if (WARN_ON(queue >= hw->queues)) |
324 | return; | |
96f5e66e | 325 | |
2a577d98 | 326 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
cf0277e7 JB |
327 | |
328 | rcu_read_lock(); | |
329 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 330 | netif_stop_subqueue(sdata->dev, queue); |
cf0277e7 | 331 | rcu_read_unlock(); |
c2d1560a | 332 | } |
ce7c9111 | 333 | |
96f5e66e JB |
334 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
335 | enum queue_stop_reason reason) | |
ce7c9111 KV |
336 | { |
337 | struct ieee80211_local *local = hw_to_local(hw); | |
338 | unsigned long flags; | |
339 | ||
340 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
341 | __ieee80211_stop_queue(hw, queue, reason); | |
342 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
343 | } | |
344 | ||
345 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
346 | { | |
347 | ieee80211_stop_queue_by_reason(hw, queue, | |
348 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
349 | } | |
c2d1560a JB |
350 | EXPORT_SYMBOL(ieee80211_stop_queue); |
351 | ||
8f77f384 JB |
352 | void ieee80211_add_pending_skb(struct ieee80211_local *local, |
353 | struct sk_buff *skb) | |
354 | { | |
355 | struct ieee80211_hw *hw = &local->hw; | |
356 | unsigned long flags; | |
357 | int queue = skb_get_queue_mapping(skb); | |
a7bc376c JB |
358 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
359 | ||
360 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 361 | kfree_skb(skb); |
a7bc376c JB |
362 | return; |
363 | } | |
8f77f384 JB |
364 | |
365 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
366 | __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
3b8d81e0 | 367 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
368 | __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD); |
369 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
370 | } | |
371 | ||
b0b97a8a JB |
372 | void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local, |
373 | struct sk_buff_head *skbs, | |
374 | void (*fn)(void *data), void *data) | |
8f77f384 JB |
375 | { |
376 | struct ieee80211_hw *hw = &local->hw; | |
377 | struct sk_buff *skb; | |
378 | unsigned long flags; | |
b0b97a8a | 379 | int queue, i; |
8f77f384 JB |
380 | |
381 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
382 | for (i = 0; i < hw->queues; i++) | |
383 | __ieee80211_stop_queue(hw, i, | |
384 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
385 | ||
386 | while ((skb = skb_dequeue(skbs))) { | |
a7bc376c JB |
387 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
388 | ||
389 | if (WARN_ON(!info->control.vif)) { | |
0819663d | 390 | kfree_skb(skb); |
a7bc376c JB |
391 | continue; |
392 | } | |
393 | ||
8f77f384 | 394 | queue = skb_get_queue_mapping(skb); |
3b8d81e0 | 395 | __skb_queue_tail(&local->pending[queue], skb); |
8f77f384 JB |
396 | } |
397 | ||
50a9432d JB |
398 | if (fn) |
399 | fn(data); | |
400 | ||
3b8d81e0 | 401 | for (i = 0; i < hw->queues; i++) |
8f77f384 JB |
402 | __ieee80211_wake_queue(hw, i, |
403 | IEEE80211_QUEUE_STOP_REASON_SKB_ADD); | |
8f77f384 | 404 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
8f77f384 JB |
405 | } |
406 | ||
b0b97a8a JB |
407 | void ieee80211_add_pending_skbs(struct ieee80211_local *local, |
408 | struct sk_buff_head *skbs) | |
50a9432d | 409 | { |
b0b97a8a | 410 | ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL); |
50a9432d JB |
411 | } |
412 | ||
ce7c9111 KV |
413 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
414 | enum queue_stop_reason reason) | |
c2d1560a | 415 | { |
ce7c9111 KV |
416 | struct ieee80211_local *local = hw_to_local(hw); |
417 | unsigned long flags; | |
c2d1560a JB |
418 | int i; |
419 | ||
ce7c9111 KV |
420 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
421 | ||
96f5e66e | 422 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
423 | __ieee80211_stop_queue(hw, i, reason); |
424 | ||
425 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
426 | } | |
427 | ||
428 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
429 | { | |
430 | ieee80211_stop_queues_by_reason(hw, | |
431 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
432 | } |
433 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
434 | ||
92ab8535 TW |
435 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
436 | { | |
437 | struct ieee80211_local *local = hw_to_local(hw); | |
3b8d81e0 JB |
438 | unsigned long flags; |
439 | int ret; | |
96f5e66e | 440 | |
e4e72fb4 JB |
441 | if (WARN_ON(queue >= hw->queues)) |
442 | return true; | |
96f5e66e | 443 | |
3b8d81e0 JB |
444 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
445 | ret = !!local->queue_stop_reasons[queue]; | |
446 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
447 | return ret; | |
92ab8535 TW |
448 | } |
449 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
450 | ||
ce7c9111 KV |
451 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
452 | enum queue_stop_reason reason) | |
c2d1560a | 453 | { |
ce7c9111 KV |
454 | struct ieee80211_local *local = hw_to_local(hw); |
455 | unsigned long flags; | |
c2d1560a JB |
456 | int i; |
457 | ||
ce7c9111 KV |
458 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
459 | ||
e4e72fb4 | 460 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
461 | __ieee80211_wake_queue(hw, i, reason); |
462 | ||
463 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
464 | } | |
465 | ||
466 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
467 | { | |
468 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
469 | } |
470 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 471 | |
32bfd35d JB |
472 | void ieee80211_iterate_active_interfaces( |
473 | struct ieee80211_hw *hw, | |
474 | void (*iterator)(void *data, u8 *mac, | |
475 | struct ieee80211_vif *vif), | |
476 | void *data) | |
dabeb344 JB |
477 | { |
478 | struct ieee80211_local *local = hw_to_local(hw); | |
479 | struct ieee80211_sub_if_data *sdata; | |
480 | ||
c771c9d8 | 481 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
482 | |
483 | list_for_each_entry(sdata, &local->interfaces, list) { | |
484 | switch (sdata->vif.type) { | |
05c914fe JB |
485 | case NL80211_IFTYPE_MONITOR: |
486 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 487 | continue; |
2ca27bcf | 488 | default: |
2f561feb ID |
489 | break; |
490 | } | |
9607e6b6 | 491 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 492 | iterator(data, sdata->vif.addr, |
2f561feb ID |
493 | &sdata->vif); |
494 | } | |
495 | ||
c771c9d8 | 496 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
497 | } |
498 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
499 | ||
500 | void ieee80211_iterate_active_interfaces_atomic( | |
501 | struct ieee80211_hw *hw, | |
502 | void (*iterator)(void *data, u8 *mac, | |
503 | struct ieee80211_vif *vif), | |
504 | void *data) | |
505 | { | |
506 | struct ieee80211_local *local = hw_to_local(hw); | |
507 | struct ieee80211_sub_if_data *sdata; | |
508 | ||
e38bad47 | 509 | rcu_read_lock(); |
dabeb344 | 510 | |
e38bad47 | 511 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 512 | switch (sdata->vif.type) { |
05c914fe JB |
513 | case NL80211_IFTYPE_MONITOR: |
514 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 515 | continue; |
2ca27bcf | 516 | default: |
dabeb344 JB |
517 | break; |
518 | } | |
9607e6b6 | 519 | if (ieee80211_sdata_running(sdata)) |
47846c9b | 520 | iterator(data, sdata->vif.addr, |
32bfd35d | 521 | &sdata->vif); |
dabeb344 | 522 | } |
e38bad47 JB |
523 | |
524 | rcu_read_unlock(); | |
dabeb344 | 525 | } |
2f561feb | 526 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da | 527 | |
42935eca LR |
528 | /* |
529 | * Nothing should have been stuffed into the workqueue during | |
530 | * the suspend->resume cycle. If this WARN is seen then there | |
531 | * is a bug with either the driver suspend or something in | |
532 | * mac80211 stuffing into the workqueue which we haven't yet | |
533 | * cleared during mac80211's suspend cycle. | |
534 | */ | |
535 | static bool ieee80211_can_queue_work(struct ieee80211_local *local) | |
536 | { | |
ceb99fe0 JB |
537 | if (WARN(local->suspended && !local->resuming, |
538 | "queueing ieee80211 work while going to suspend\n")) | |
539 | return false; | |
42935eca LR |
540 | |
541 | return true; | |
542 | } | |
543 | ||
544 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) | |
545 | { | |
546 | struct ieee80211_local *local = hw_to_local(hw); | |
547 | ||
548 | if (!ieee80211_can_queue_work(local)) | |
549 | return; | |
550 | ||
551 | queue_work(local->workqueue, work); | |
552 | } | |
553 | EXPORT_SYMBOL(ieee80211_queue_work); | |
554 | ||
555 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
556 | struct delayed_work *dwork, | |
557 | unsigned long delay) | |
558 | { | |
559 | struct ieee80211_local *local = hw_to_local(hw); | |
560 | ||
561 | if (!ieee80211_can_queue_work(local)) | |
562 | return; | |
563 | ||
564 | queue_delayed_work(local->workqueue, dwork, delay); | |
565 | } | |
566 | EXPORT_SYMBOL(ieee80211_queue_delayed_work); | |
567 | ||
dd76986b JB |
568 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, |
569 | struct ieee802_11_elems *elems, | |
570 | u64 filter, u32 crc) | |
571 | { | |
572 | size_t left = len; | |
573 | u8 *pos = start; | |
574 | bool calc_crc = filter != 0; | |
575 | ||
576 | memset(elems, 0, sizeof(*elems)); | |
577 | elems->ie_start = start; | |
578 | elems->total_len = len; | |
579 | ||
580 | while (left >= 2) { | |
581 | u8 id, elen; | |
582 | ||
583 | id = *pos++; | |
584 | elen = *pos++; | |
585 | left -= 2; | |
586 | ||
587 | if (elen > left) | |
588 | break; | |
589 | ||
590 | if (calc_crc && id < 64 && (filter & (1ULL << id))) | |
591 | crc = crc32_be(crc, pos - 2, elen + 2); | |
592 | ||
593 | switch (id) { | |
594 | case WLAN_EID_SSID: | |
595 | elems->ssid = pos; | |
596 | elems->ssid_len = elen; | |
597 | break; | |
598 | case WLAN_EID_SUPP_RATES: | |
599 | elems->supp_rates = pos; | |
600 | elems->supp_rates_len = elen; | |
601 | break; | |
602 | case WLAN_EID_FH_PARAMS: | |
603 | elems->fh_params = pos; | |
604 | elems->fh_params_len = elen; | |
605 | break; | |
606 | case WLAN_EID_DS_PARAMS: | |
607 | elems->ds_params = pos; | |
608 | elems->ds_params_len = elen; | |
609 | break; | |
610 | case WLAN_EID_CF_PARAMS: | |
611 | elems->cf_params = pos; | |
612 | elems->cf_params_len = elen; | |
613 | break; | |
614 | case WLAN_EID_TIM: | |
615 | if (elen >= sizeof(struct ieee80211_tim_ie)) { | |
616 | elems->tim = (void *)pos; | |
617 | elems->tim_len = elen; | |
618 | } | |
619 | break; | |
620 | case WLAN_EID_IBSS_PARAMS: | |
621 | elems->ibss_params = pos; | |
622 | elems->ibss_params_len = elen; | |
623 | break; | |
624 | case WLAN_EID_CHALLENGE: | |
625 | elems->challenge = pos; | |
626 | elems->challenge_len = elen; | |
627 | break; | |
628 | case WLAN_EID_VENDOR_SPECIFIC: | |
629 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
630 | pos[2] == 0xf2) { | |
631 | /* Microsoft OUI (00:50:F2) */ | |
632 | ||
633 | if (calc_crc) | |
634 | crc = crc32_be(crc, pos - 2, elen + 2); | |
635 | ||
636 | if (pos[3] == 1) { | |
637 | /* OUI Type 1 - WPA IE */ | |
638 | elems->wpa = pos; | |
639 | elems->wpa_len = elen; | |
640 | } else if (elen >= 5 && pos[3] == 2) { | |
641 | /* OUI Type 2 - WMM IE */ | |
642 | if (pos[4] == 0) { | |
643 | elems->wmm_info = pos; | |
644 | elems->wmm_info_len = elen; | |
645 | } else if (pos[4] == 1) { | |
646 | elems->wmm_param = pos; | |
647 | elems->wmm_param_len = elen; | |
648 | } | |
649 | } | |
650 | } | |
651 | break; | |
652 | case WLAN_EID_RSN: | |
653 | elems->rsn = pos; | |
654 | elems->rsn_len = elen; | |
655 | break; | |
656 | case WLAN_EID_ERP_INFO: | |
657 | elems->erp_info = pos; | |
658 | elems->erp_info_len = elen; | |
659 | break; | |
660 | case WLAN_EID_EXT_SUPP_RATES: | |
661 | elems->ext_supp_rates = pos; | |
662 | elems->ext_supp_rates_len = elen; | |
663 | break; | |
664 | case WLAN_EID_HT_CAPABILITY: | |
665 | if (elen >= sizeof(struct ieee80211_ht_cap)) | |
666 | elems->ht_cap_elem = (void *)pos; | |
667 | break; | |
668 | case WLAN_EID_HT_INFORMATION: | |
669 | if (elen >= sizeof(struct ieee80211_ht_info)) | |
670 | elems->ht_info_elem = (void *)pos; | |
671 | break; | |
672 | case WLAN_EID_MESH_ID: | |
673 | elems->mesh_id = pos; | |
674 | elems->mesh_id_len = elen; | |
675 | break; | |
676 | case WLAN_EID_MESH_CONFIG: | |
677 | if (elen >= sizeof(struct ieee80211_meshconf_ie)) | |
678 | elems->mesh_config = (void *)pos; | |
679 | break; | |
680 | case WLAN_EID_PEER_MGMT: | |
681 | elems->peering = pos; | |
682 | elems->peering_len = elen; | |
683 | break; | |
684 | case WLAN_EID_PREQ: | |
685 | elems->preq = pos; | |
686 | elems->preq_len = elen; | |
687 | break; | |
688 | case WLAN_EID_PREP: | |
689 | elems->prep = pos; | |
690 | elems->prep_len = elen; | |
691 | break; | |
692 | case WLAN_EID_PERR: | |
693 | elems->perr = pos; | |
694 | elems->perr_len = elen; | |
695 | break; | |
696 | case WLAN_EID_RANN: | |
697 | if (elen >= sizeof(struct ieee80211_rann_ie)) | |
698 | elems->rann = (void *)pos; | |
699 | break; | |
700 | case WLAN_EID_CHANNEL_SWITCH: | |
701 | elems->ch_switch_elem = pos; | |
702 | elems->ch_switch_elem_len = elen; | |
703 | break; | |
704 | case WLAN_EID_QUIET: | |
705 | if (!elems->quiet_elem) { | |
706 | elems->quiet_elem = pos; | |
707 | elems->quiet_elem_len = elen; | |
708 | } | |
709 | elems->num_of_quiet_elem++; | |
710 | break; | |
711 | case WLAN_EID_COUNTRY: | |
712 | elems->country_elem = pos; | |
713 | elems->country_elem_len = elen; | |
714 | break; | |
715 | case WLAN_EID_PWR_CONSTRAINT: | |
716 | elems->pwr_constr_elem = pos; | |
717 | elems->pwr_constr_elem_len = elen; | |
718 | break; | |
719 | case WLAN_EID_TIMEOUT_INTERVAL: | |
720 | elems->timeout_int = pos; | |
721 | elems->timeout_int_len = elen; | |
722 | break; | |
723 | default: | |
724 | break; | |
725 | } | |
726 | ||
727 | left -= elen; | |
728 | pos += elen; | |
729 | } | |
730 | ||
731 | return crc; | |
732 | } | |
733 | ||
37ffc8da JB |
734 | void ieee802_11_parse_elems(u8 *start, size_t len, |
735 | struct ieee802_11_elems *elems) | |
d91f36db JB |
736 | { |
737 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
738 | } | |
739 | ||
5825fe10 JB |
740 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) |
741 | { | |
742 | struct ieee80211_local *local = sdata->local; | |
743 | struct ieee80211_tx_queue_params qparam; | |
aa837e1d JB |
744 | int queue; |
745 | bool use_11b; | |
746 | int aCWmin, aCWmax; | |
5825fe10 JB |
747 | |
748 | if (!local->ops->conf_tx) | |
749 | return; | |
750 | ||
751 | memset(&qparam, 0, sizeof(qparam)); | |
752 | ||
aa837e1d JB |
753 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
754 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 755 | |
aa837e1d JB |
756 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
757 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
758 | aCWmax = 1023; | |
759 | if (use_11b) | |
760 | aCWmin = 31; | |
761 | else | |
762 | aCWmin = 15; | |
763 | ||
764 | switch (queue) { | |
765 | case 3: /* AC_BK */ | |
7ba10a8e JB |
766 | qparam.cw_max = aCWmax; |
767 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
768 | qparam.txop = 0; |
769 | qparam.aifs = 7; | |
770 | break; | |
771 | default: /* never happens but let's not leave undefined */ | |
772 | case 2: /* AC_BE */ | |
7ba10a8e JB |
773 | qparam.cw_max = aCWmax; |
774 | qparam.cw_min = aCWmin; | |
aa837e1d JB |
775 | qparam.txop = 0; |
776 | qparam.aifs = 3; | |
777 | break; | |
778 | case 1: /* AC_VI */ | |
779 | qparam.cw_max = aCWmin; | |
780 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
781 | if (use_11b) | |
782 | qparam.txop = 6016/32; | |
783 | else | |
784 | qparam.txop = 3008/32; | |
785 | qparam.aifs = 2; | |
786 | break; | |
787 | case 0: /* AC_VO */ | |
788 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
789 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
790 | if (use_11b) | |
791 | qparam.txop = 3264/32; | |
792 | else | |
793 | qparam.txop = 1504/32; | |
794 | qparam.aifs = 2; | |
795 | break; | |
796 | } | |
5825fe10 | 797 | |
ab13315a KV |
798 | qparam.uapsd = false; |
799 | ||
f6f3def3 EP |
800 | sdata->tx_conf[queue] = qparam; |
801 | drv_conf_tx(local, sdata, queue, &qparam); | |
aa837e1d | 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); |
d15b8459 | 875 | if (!skb) |
46900298 | 876 | return; |
d15b8459 | 877 | |
46900298 JB |
878 | skb_reserve(skb, local->hw.extra_tx_headroom); |
879 | ||
880 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
881 | memset(mgmt, 0, 24 + 6); | |
882 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
883 | IEEE80211_STYPE_AUTH); | |
46900298 | 884 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 885 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
886 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
887 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
888 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
889 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
890 | if (extra) | |
891 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 | 892 | |
fffd0934 JB |
893 | if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { |
894 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
895 | err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); | |
896 | WARN_ON(err); | |
897 | } | |
898 | ||
62ae67be JB |
899 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
900 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
901 | } |
902 | ||
de95a54b | 903 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
4d36ec58 | 904 | const u8 *ie, size_t ie_len, |
651b5225 JM |
905 | enum ieee80211_band band, u32 rate_mask, |
906 | u8 channel) | |
de95a54b JB |
907 | { |
908 | struct ieee80211_supported_band *sband; | |
8e664fb3 JB |
909 | u8 *pos; |
910 | size_t offset = 0, noffset; | |
911 | int supp_rates_len, i; | |
8dcb2003 JM |
912 | u8 rates[32]; |
913 | int num_rates; | |
914 | int ext_rates_len; | |
de95a54b | 915 | |
4d36ec58 | 916 | sband = local->hw.wiphy->bands[band]; |
de95a54b JB |
917 | |
918 | pos = buffer; | |
919 | ||
8dcb2003 JM |
920 | num_rates = 0; |
921 | for (i = 0; i < sband->n_bitrates; i++) { | |
922 | if ((BIT(i) & rate_mask) == 0) | |
923 | continue; /* skip rate */ | |
924 | rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5); | |
925 | } | |
926 | ||
927 | supp_rates_len = min_t(int, num_rates, 8); | |
8e664fb3 | 928 | |
de95a54b | 929 | *pos++ = WLAN_EID_SUPP_RATES; |
8e664fb3 | 930 | *pos++ = supp_rates_len; |
8dcb2003 JM |
931 | memcpy(pos, rates, supp_rates_len); |
932 | pos += supp_rates_len; | |
8e664fb3 JB |
933 | |
934 | /* insert "request information" if in custom IEs */ | |
935 | if (ie && ie_len) { | |
936 | static const u8 before_extrates[] = { | |
937 | WLAN_EID_SSID, | |
938 | WLAN_EID_SUPP_RATES, | |
939 | WLAN_EID_REQUEST, | |
940 | }; | |
941 | noffset = ieee80211_ie_split(ie, ie_len, | |
942 | before_extrates, | |
943 | ARRAY_SIZE(before_extrates), | |
944 | offset); | |
945 | memcpy(pos, ie + offset, noffset - offset); | |
946 | pos += noffset - offset; | |
947 | offset = noffset; | |
948 | } | |
949 | ||
8dcb2003 JM |
950 | ext_rates_len = num_rates - supp_rates_len; |
951 | if (ext_rates_len > 0) { | |
8e664fb3 | 952 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
8dcb2003 JM |
953 | *pos++ = ext_rates_len; |
954 | memcpy(pos, rates + supp_rates_len, ext_rates_len); | |
955 | pos += ext_rates_len; | |
8e664fb3 JB |
956 | } |
957 | ||
651b5225 JM |
958 | if (channel && sband->band == IEEE80211_BAND_2GHZ) { |
959 | *pos++ = WLAN_EID_DS_PARAMS; | |
960 | *pos++ = 1; | |
961 | *pos++ = channel; | |
962 | } | |
963 | ||
8e664fb3 JB |
964 | /* insert custom IEs that go before HT */ |
965 | if (ie && ie_len) { | |
966 | static const u8 before_ht[] = { | |
967 | WLAN_EID_SSID, | |
968 | WLAN_EID_SUPP_RATES, | |
969 | WLAN_EID_REQUEST, | |
970 | WLAN_EID_EXT_SUPP_RATES, | |
971 | WLAN_EID_DS_PARAMS, | |
972 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
973 | }; | |
974 | noffset = ieee80211_ie_split(ie, ie_len, | |
975 | before_ht, ARRAY_SIZE(before_ht), | |
976 | offset); | |
977 | memcpy(pos, ie + offset, noffset - offset); | |
978 | pos += noffset - offset; | |
979 | offset = noffset; | |
de95a54b JB |
980 | } |
981 | ||
42e7aa77 | 982 | if (sband->ht_cap.ht_supported) |
ef96a842 BG |
983 | pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, |
984 | sband->ht_cap.cap); | |
5ef2d41a | 985 | |
de95a54b JB |
986 | /* |
987 | * If adding more here, adjust code in main.c | |
988 | * that calculates local->scan_ies_len. | |
989 | */ | |
990 | ||
8e664fb3 JB |
991 | /* add any remaining custom IEs */ |
992 | if (ie && ie_len) { | |
993 | noffset = ie_len; | |
994 | memcpy(pos, ie + offset, noffset - offset); | |
995 | pos += noffset - offset; | |
de95a54b JB |
996 | } |
997 | ||
998 | return pos - buffer; | |
999 | } | |
1000 | ||
a619a4c0 | 1001 | struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, |
85a237fe | 1002 | u8 *dst, u32 ratemask, |
a619a4c0 | 1003 | const u8 *ssid, size_t ssid_len, |
a806c558 PS |
1004 | const u8 *ie, size_t ie_len, |
1005 | bool directed) | |
46900298 JB |
1006 | { |
1007 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
1008 | struct sk_buff *skb; |
1009 | struct ieee80211_mgmt *mgmt; | |
7c12ce8b KV |
1010 | size_t buf_len; |
1011 | u8 *buf; | |
651b5225 | 1012 | u8 chan; |
7c12ce8b KV |
1013 | |
1014 | /* FIXME: come up with a proper value */ | |
1015 | buf = kmalloc(200 + ie_len, GFP_KERNEL); | |
d15b8459 | 1016 | if (!buf) |
a619a4c0 | 1017 | return NULL; |
46900298 | 1018 | |
a806c558 PS |
1019 | /* |
1020 | * Do not send DS Channel parameter for directed probe requests | |
1021 | * in order to maximize the chance that we get a response. Some | |
1022 | * badly-behaved APs don't respond when this parameter is included. | |
1023 | */ | |
1024 | if (directed) | |
1025 | chan = 0; | |
1026 | else | |
1027 | chan = ieee80211_frequency_to_channel( | |
1028 | local->hw.conf.channel->center_freq); | |
651b5225 | 1029 | |
7c12ce8b | 1030 | buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, |
8dcb2003 | 1031 | local->hw.conf.channel->band, |
85a237fe | 1032 | ratemask, chan); |
7c12ce8b KV |
1033 | |
1034 | skb = ieee80211_probereq_get(&local->hw, &sdata->vif, | |
1035 | ssid, ssid_len, | |
1036 | buf, buf_len); | |
5b2bbf75 JB |
1037 | if (!skb) |
1038 | goto out; | |
7c12ce8b | 1039 | |
46900298 | 1040 | if (dst) { |
7c12ce8b | 1041 | mgmt = (struct ieee80211_mgmt *) skb->data; |
46900298 JB |
1042 | memcpy(mgmt->da, dst, ETH_ALEN); |
1043 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
46900298 | 1044 | } |
46900298 | 1045 | |
62ae67be | 1046 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5b2bbf75 JB |
1047 | |
1048 | out: | |
145b6d1a | 1049 | kfree(buf); |
a619a4c0 JO |
1050 | |
1051 | return skb; | |
1052 | } | |
1053 | ||
1054 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
1055 | const u8 *ssid, size_t ssid_len, | |
a806c558 | 1056 | const u8 *ie, size_t ie_len, |
aad14ceb | 1057 | u32 ratemask, bool directed, bool no_cck) |
a619a4c0 JO |
1058 | { |
1059 | struct sk_buff *skb; | |
1060 | ||
85a237fe JB |
1061 | skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len, |
1062 | ie, ie_len, directed); | |
aad14ceb RM |
1063 | if (skb) { |
1064 | if (no_cck) | |
1065 | IEEE80211_SKB_CB(skb)->flags |= | |
1066 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
a619a4c0 | 1067 | ieee80211_tx_skb(sdata, skb); |
aad14ceb | 1068 | } |
46900298 JB |
1069 | } |
1070 | ||
1071 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
1072 | struct ieee802_11_elems *elems, | |
1073 | enum ieee80211_band band) | |
1074 | { | |
1075 | struct ieee80211_supported_band *sband; | |
1076 | struct ieee80211_rate *bitrates; | |
1077 | size_t num_rates; | |
1078 | u32 supp_rates; | |
1079 | int i, j; | |
1080 | sband = local->hw.wiphy->bands[band]; | |
1081 | ||
1082 | if (!sband) { | |
1083 | WARN_ON(1); | |
1084 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1085 | } | |
1086 | ||
1087 | bitrates = sband->bitrates; | |
1088 | num_rates = sband->n_bitrates; | |
1089 | supp_rates = 0; | |
1090 | for (i = 0; i < elems->supp_rates_len + | |
1091 | elems->ext_supp_rates_len; i++) { | |
1092 | u8 rate = 0; | |
1093 | int own_rate; | |
1094 | if (i < elems->supp_rates_len) | |
1095 | rate = elems->supp_rates[i]; | |
1096 | else if (elems->ext_supp_rates) | |
1097 | rate = elems->ext_supp_rates | |
1098 | [i - elems->supp_rates_len]; | |
1099 | own_rate = 5 * (rate & 0x7f); | |
1100 | for (j = 0; j < num_rates; j++) | |
1101 | if (bitrates[j].bitrate == own_rate) | |
1102 | supp_rates |= BIT(j); | |
1103 | } | |
1104 | return supp_rates; | |
1105 | } | |
f2753ddb | 1106 | |
84f6a01c JB |
1107 | void ieee80211_stop_device(struct ieee80211_local *local) |
1108 | { | |
1109 | ieee80211_led_radio(local, false); | |
67408c8c | 1110 | ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); |
84f6a01c JB |
1111 | |
1112 | cancel_work_sync(&local->reconfig_filter); | |
84f6a01c JB |
1113 | |
1114 | flush_workqueue(local->workqueue); | |
678f415f | 1115 | drv_stop(local); |
84f6a01c JB |
1116 | } |
1117 | ||
f2753ddb JB |
1118 | int ieee80211_reconfig(struct ieee80211_local *local) |
1119 | { | |
1120 | struct ieee80211_hw *hw = &local->hw; | |
1121 | struct ieee80211_sub_if_data *sdata; | |
f2753ddb | 1122 | struct sta_info *sta; |
2683d65b | 1123 | int res, i; |
5bb644a0 | 1124 | |
eecc4800 | 1125 | #ifdef CONFIG_PM |
ceb99fe0 JB |
1126 | if (local->suspended) |
1127 | local->resuming = true; | |
f2753ddb | 1128 | |
eecc4800 JB |
1129 | if (local->wowlan) { |
1130 | local->wowlan = false; | |
1131 | res = drv_resume(local); | |
1132 | if (res < 0) { | |
1133 | local->resuming = false; | |
1134 | return res; | |
1135 | } | |
1136 | if (res == 0) | |
1137 | goto wake_up; | |
1138 | WARN_ON(res > 1); | |
1139 | /* | |
1140 | * res is 1, which means the driver requested | |
1141 | * to go through a regular reset on wakeup. | |
1142 | */ | |
1143 | } | |
1144 | #endif | |
1145 | ||
94f9b97b JB |
1146 | /* setup fragmentation threshold */ |
1147 | drv_set_frag_threshold(local, hw->wiphy->frag_threshold); | |
1148 | ||
1149 | /* setup RTS threshold */ | |
1150 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); | |
1151 | ||
1152 | /* reset coverage class */ | |
1153 | drv_set_coverage_class(local, hw->wiphy->coverage_class); | |
1154 | ||
1155 | /* everything else happens only if HW was up & running */ | |
1156 | if (!local->open_count) | |
1157 | goto wake_up; | |
f2753ddb | 1158 | |
94f9b97b JB |
1159 | /* |
1160 | * Upon resume hardware can sometimes be goofy due to | |
1161 | * various platform / driver / bus issues, so restarting | |
1162 | * the device may at times not work immediately. Propagate | |
1163 | * the error. | |
1164 | */ | |
1165 | res = drv_start(local); | |
1166 | if (res) { | |
1167 | WARN(local->suspended, "Hardware became unavailable " | |
1168 | "upon resume. This could be a software issue " | |
1169 | "prior to suspend or a hardware issue.\n"); | |
1170 | return res; | |
f2753ddb JB |
1171 | } |
1172 | ||
94f9b97b JB |
1173 | ieee80211_led_radio(local, true); |
1174 | ieee80211_mod_tpt_led_trig(local, | |
1175 | IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); | |
1176 | ||
f2753ddb JB |
1177 | /* add interfaces */ |
1178 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1179 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1180 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1ed32e4f | 1181 | ieee80211_sdata_running(sdata)) |
7b7eab6f | 1182 | res = drv_add_interface(local, sdata); |
f2753ddb JB |
1183 | } |
1184 | ||
1185 | /* add STAs back */ | |
34e89507 JB |
1186 | mutex_lock(&local->sta_mtx); |
1187 | list_for_each_entry(sta, &local->sta_list, list) { | |
1188 | if (sta->uploaded) { | |
5bb644a0 | 1189 | sdata = sta->sdata; |
f2753ddb JB |
1190 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1191 | sdata = container_of(sdata->bss, | |
1192 | struct ieee80211_sub_if_data, | |
1193 | u.ap); | |
1194 | ||
34e89507 | 1195 | WARN_ON(drv_sta_add(local, sdata, &sta->sta)); |
f2753ddb | 1196 | } |
f2753ddb | 1197 | } |
34e89507 | 1198 | mutex_unlock(&local->sta_mtx); |
f2753ddb | 1199 | |
2683d65b | 1200 | /* reconfigure tx conf */ |
f6f3def3 EP |
1201 | list_for_each_entry(sdata, &local->interfaces, list) { |
1202 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1203 | sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1204 | !ieee80211_sdata_running(sdata)) | |
1205 | continue; | |
1206 | ||
1207 | for (i = 0; i < hw->queues; i++) | |
1208 | drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]); | |
1209 | } | |
2683d65b | 1210 | |
f2753ddb JB |
1211 | /* reconfigure hardware */ |
1212 | ieee80211_hw_config(local, ~0); | |
1213 | ||
f2753ddb | 1214 | ieee80211_configure_filter(local); |
f2753ddb JB |
1215 | |
1216 | /* Finally also reconfigure all the BSS information */ | |
1217 | list_for_each_entry(sdata, &local->interfaces, list) { | |
ac8dd506 JB |
1218 | u32 changed; |
1219 | ||
9607e6b6 | 1220 | if (!ieee80211_sdata_running(sdata)) |
f2753ddb | 1221 | continue; |
ac8dd506 JB |
1222 | |
1223 | /* common change flags for all interface types */ | |
1224 | changed = BSS_CHANGED_ERP_CTS_PROT | | |
1225 | BSS_CHANGED_ERP_PREAMBLE | | |
1226 | BSS_CHANGED_ERP_SLOT | | |
1227 | BSS_CHANGED_HT | | |
1228 | BSS_CHANGED_BASIC_RATES | | |
1229 | BSS_CHANGED_BEACON_INT | | |
1230 | BSS_CHANGED_BSSID | | |
4ced3f74 | 1231 | BSS_CHANGED_CQM | |
55de47f6 EP |
1232 | BSS_CHANGED_QOS | |
1233 | BSS_CHANGED_IDLE; | |
ac8dd506 | 1234 | |
f2753ddb JB |
1235 | switch (sdata->vif.type) { |
1236 | case NL80211_IFTYPE_STATION: | |
ac8dd506 | 1237 | changed |= BSS_CHANGED_ASSOC; |
a7b545f7 | 1238 | mutex_lock(&sdata->u.mgd.mtx); |
ac8dd506 | 1239 | ieee80211_bss_info_change_notify(sdata, changed); |
a7b545f7 | 1240 | mutex_unlock(&sdata->u.mgd.mtx); |
ac8dd506 | 1241 | break; |
f2753ddb | 1242 | case NL80211_IFTYPE_ADHOC: |
ac8dd506 JB |
1243 | changed |= BSS_CHANGED_IBSS; |
1244 | /* fall through */ | |
f2753ddb | 1245 | case NL80211_IFTYPE_AP: |
e7979ac7 AN |
1246 | changed |= BSS_CHANGED_SSID; |
1247 | ||
1248 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1249 | changed |= BSS_CHANGED_AP_PROBE_RESP; | |
1250 | ||
7827493b | 1251 | /* fall through */ |
f2753ddb | 1252 | case NL80211_IFTYPE_MESH_POINT: |
ac8dd506 JB |
1253 | changed |= BSS_CHANGED_BEACON | |
1254 | BSS_CHANGED_BEACON_ENABLED; | |
2d0ddec5 | 1255 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1256 | break; |
1257 | case NL80211_IFTYPE_WDS: | |
1258 | break; | |
1259 | case NL80211_IFTYPE_AP_VLAN: | |
1260 | case NL80211_IFTYPE_MONITOR: | |
1261 | /* ignore virtual */ | |
1262 | break; | |
1263 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1264 | case NUM_NL80211_IFTYPES: |
2ca27bcf JB |
1265 | case NL80211_IFTYPE_P2P_CLIENT: |
1266 | case NL80211_IFTYPE_P2P_GO: | |
f2753ddb JB |
1267 | WARN_ON(1); |
1268 | break; | |
1269 | } | |
1270 | } | |
1271 | ||
8e1b23b9 ES |
1272 | ieee80211_recalc_ps(local, -1); |
1273 | ||
2a419056 JB |
1274 | /* |
1275 | * Clear the WLAN_STA_BLOCK_BA flag so new aggregation | |
1276 | * sessions can be established after a resume. | |
1277 | * | |
1278 | * Also tear down aggregation sessions since reconfiguring | |
1279 | * them in a hardware restart scenario is not easily done | |
1280 | * right now, and the hardware will have lost information | |
1281 | * about the sessions, but we and the AP still think they | |
1282 | * are active. This is really a workaround though. | |
1283 | */ | |
74e2bd1f | 1284 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
2a419056 JB |
1285 | mutex_lock(&local->sta_mtx); |
1286 | ||
1287 | list_for_each_entry(sta, &local->sta_list, list) { | |
53f73c09 | 1288 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
c2c98fde | 1289 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
74e2bd1f | 1290 | } |
2a419056 JB |
1291 | |
1292 | mutex_unlock(&local->sta_mtx); | |
74e2bd1f | 1293 | } |
74e2bd1f | 1294 | |
f2753ddb JB |
1295 | /* add back keys */ |
1296 | list_for_each_entry(sdata, &local->interfaces, list) | |
9607e6b6 | 1297 | if (ieee80211_sdata_running(sdata)) |
f2753ddb JB |
1298 | ieee80211_enable_keys(sdata); |
1299 | ||
eecc4800 | 1300 | wake_up: |
f2753ddb JB |
1301 | ieee80211_wake_queues_by_reason(hw, |
1302 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1303 | ||
5bb644a0 JB |
1304 | /* |
1305 | * If this is for hw restart things are still running. | |
1306 | * We may want to change that later, however. | |
1307 | */ | |
ceb99fe0 | 1308 | if (!local->suspended) |
5bb644a0 JB |
1309 | return 0; |
1310 | ||
1311 | #ifdef CONFIG_PM | |
ceb99fe0 | 1312 | /* first set suspended false, then resuming */ |
5bb644a0 | 1313 | local->suspended = false; |
ceb99fe0 JB |
1314 | mb(); |
1315 | local->resuming = false; | |
5bb644a0 JB |
1316 | |
1317 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1318 | switch(sdata->vif.type) { | |
1319 | case NL80211_IFTYPE_STATION: | |
1320 | ieee80211_sta_restart(sdata); | |
1321 | break; | |
1322 | case NL80211_IFTYPE_ADHOC: | |
1323 | ieee80211_ibss_restart(sdata); | |
1324 | break; | |
1325 | case NL80211_IFTYPE_MESH_POINT: | |
1326 | ieee80211_mesh_restart(sdata); | |
1327 | break; | |
1328 | default: | |
1329 | break; | |
1330 | } | |
1331 | } | |
1332 | ||
26d59535 | 1333 | mod_timer(&local->sta_cleanup, jiffies + 1); |
5bb644a0 | 1334 | |
34e89507 | 1335 | mutex_lock(&local->sta_mtx); |
5bb644a0 JB |
1336 | list_for_each_entry(sta, &local->sta_list, list) |
1337 | mesh_plink_restart(sta); | |
34e89507 | 1338 | mutex_unlock(&local->sta_mtx); |
5bb644a0 JB |
1339 | #else |
1340 | WARN_ON(1); | |
1341 | #endif | |
f2753ddb JB |
1342 | return 0; |
1343 | } | |
42935eca | 1344 | |
95acac61 JB |
1345 | void ieee80211_resume_disconnect(struct ieee80211_vif *vif) |
1346 | { | |
1347 | struct ieee80211_sub_if_data *sdata; | |
1348 | struct ieee80211_local *local; | |
1349 | struct ieee80211_key *key; | |
1350 | ||
1351 | if (WARN_ON(!vif)) | |
1352 | return; | |
1353 | ||
1354 | sdata = vif_to_sdata(vif); | |
1355 | local = sdata->local; | |
1356 | ||
1357 | if (WARN_ON(!local->resuming)) | |
1358 | return; | |
1359 | ||
1360 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
1361 | return; | |
1362 | ||
1363 | sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; | |
1364 | ||
1365 | mutex_lock(&local->key_mtx); | |
1366 | list_for_each_entry(key, &sdata->key_list, list) | |
1367 | key->flags |= KEY_FLAG_TAINTED; | |
1368 | mutex_unlock(&local->key_mtx); | |
1369 | } | |
1370 | EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); | |
1371 | ||
0f78231b JB |
1372 | static int check_mgd_smps(struct ieee80211_if_managed *ifmgd, |
1373 | enum ieee80211_smps_mode *smps_mode) | |
1374 | { | |
1375 | if (ifmgd->associated) { | |
1376 | *smps_mode = ifmgd->ap_smps; | |
1377 | ||
1378 | if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) { | |
1379 | if (ifmgd->powersave) | |
1380 | *smps_mode = IEEE80211_SMPS_DYNAMIC; | |
1381 | else | |
1382 | *smps_mode = IEEE80211_SMPS_OFF; | |
1383 | } | |
1384 | ||
1385 | return 1; | |
1386 | } | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | /* must hold iflist_mtx */ | |
025e6be2 | 1392 | void ieee80211_recalc_smps(struct ieee80211_local *local) |
0f78231b JB |
1393 | { |
1394 | struct ieee80211_sub_if_data *sdata; | |
1395 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF; | |
1396 | int count = 0; | |
1397 | ||
46a5ebaf | 1398 | lockdep_assert_held(&local->iflist_mtx); |
0f78231b JB |
1399 | |
1400 | /* | |
1401 | * This function could be improved to handle multiple | |
1402 | * interfaces better, but right now it makes any | |
1403 | * non-station interfaces force SM PS to be turned | |
1404 | * off. If there are multiple station interfaces it | |
1405 | * could also use the best possible mode, e.g. if | |
1406 | * one is in static and the other in dynamic then | |
1407 | * dynamic is ok. | |
1408 | */ | |
1409 | ||
1410 | list_for_each_entry(sdata, &local->interfaces, list) { | |
26a58456 | 1411 | if (!ieee80211_sdata_running(sdata)) |
0f78231b JB |
1412 | continue; |
1413 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1414 | goto set; | |
025e6be2 JB |
1415 | |
1416 | count += check_mgd_smps(&sdata->u.mgd, &smps_mode); | |
0f78231b JB |
1417 | |
1418 | if (count > 1) { | |
1419 | smps_mode = IEEE80211_SMPS_OFF; | |
1420 | break; | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | if (smps_mode == local->smps_mode) | |
1425 | return; | |
1426 | ||
1427 | set: | |
1428 | local->smps_mode = smps_mode; | |
1429 | /* changed flag is auto-detected for this */ | |
1430 | ieee80211_hw_config(local, 0); | |
1431 | } | |
8e664fb3 JB |
1432 | |
1433 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) | |
1434 | { | |
1435 | int i; | |
1436 | ||
1437 | for (i = 0; i < n_ids; i++) | |
1438 | if (ids[i] == id) | |
1439 | return true; | |
1440 | return false; | |
1441 | } | |
1442 | ||
1443 | /** | |
1444 | * ieee80211_ie_split - split an IE buffer according to ordering | |
1445 | * | |
1446 | * @ies: the IE buffer | |
1447 | * @ielen: the length of the IE buffer | |
1448 | * @ids: an array with element IDs that are allowed before | |
1449 | * the split | |
1450 | * @n_ids: the size of the element ID array | |
1451 | * @offset: offset where to start splitting in the buffer | |
1452 | * | |
1453 | * This function splits an IE buffer by updating the @offset | |
1454 | * variable to point to the location where the buffer should be | |
1455 | * split. | |
1456 | * | |
1457 | * It assumes that the given IE buffer is well-formed, this | |
1458 | * has to be guaranteed by the caller! | |
1459 | * | |
1460 | * It also assumes that the IEs in the buffer are ordered | |
1461 | * correctly, if not the result of using this function will not | |
1462 | * be ordered correctly either, i.e. it does no reordering. | |
1463 | * | |
1464 | * The function returns the offset where the next part of the | |
1465 | * buffer starts, which may be @ielen if the entire (remainder) | |
1466 | * of the buffer should be used. | |
1467 | */ | |
1468 | size_t ieee80211_ie_split(const u8 *ies, size_t ielen, | |
1469 | const u8 *ids, int n_ids, size_t offset) | |
1470 | { | |
1471 | size_t pos = offset; | |
1472 | ||
1473 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) | |
1474 | pos += 2 + ies[pos + 1]; | |
1475 | ||
1476 | return pos; | |
1477 | } | |
1478 | ||
1479 | size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) | |
1480 | { | |
1481 | size_t pos = offset; | |
1482 | ||
1483 | while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) | |
1484 | pos += 2 + ies[pos + 1]; | |
1485 | ||
1486 | return pos; | |
1487 | } | |
615f7b9b MV |
1488 | |
1489 | static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, | |
1490 | int rssi_min_thold, | |
1491 | int rssi_max_thold) | |
1492 | { | |
1493 | trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); | |
1494 | ||
1495 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1496 | return; | |
1497 | ||
1498 | /* | |
1499 | * Scale up threshold values before storing it, as the RSSI averaging | |
1500 | * algorithm uses a scaled up value as well. Change this scaling | |
1501 | * factor if the RSSI averaging algorithm changes. | |
1502 | */ | |
1503 | sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; | |
1504 | sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; | |
1505 | } | |
1506 | ||
1507 | void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, | |
1508 | int rssi_min_thold, | |
1509 | int rssi_max_thold) | |
1510 | { | |
1511 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1512 | ||
1513 | WARN_ON(rssi_min_thold == rssi_max_thold || | |
1514 | rssi_min_thold > rssi_max_thold); | |
1515 | ||
1516 | _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, | |
1517 | rssi_max_thold); | |
1518 | } | |
1519 | EXPORT_SYMBOL(ieee80211_enable_rssi_reports); | |
1520 | ||
1521 | void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) | |
1522 | { | |
1523 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1524 | ||
1525 | _ieee80211_enable_rssi_reports(sdata, 0, 0); | |
1526 | } | |
1527 | EXPORT_SYMBOL(ieee80211_disable_rssi_reports); | |
768db343 | 1528 | |
ef96a842 | 1529 | u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, |
42e7aa77 AS |
1530 | u16 cap) |
1531 | { | |
1532 | __le16 tmp; | |
1533 | ||
1534 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
1535 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
1536 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
1537 | ||
1538 | /* capability flags */ | |
1539 | tmp = cpu_to_le16(cap); | |
1540 | memcpy(pos, &tmp, sizeof(u16)); | |
1541 | pos += sizeof(u16); | |
1542 | ||
1543 | /* AMPDU parameters */ | |
ef96a842 BG |
1544 | *pos++ = ht_cap->ampdu_factor | |
1545 | (ht_cap->ampdu_density << | |
42e7aa77 AS |
1546 | IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); |
1547 | ||
1548 | /* MCS set */ | |
ef96a842 BG |
1549 | memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); |
1550 | pos += sizeof(ht_cap->mcs); | |
42e7aa77 AS |
1551 | |
1552 | /* extended capabilities */ | |
1553 | pos += sizeof(__le16); | |
1554 | ||
1555 | /* BF capabilities */ | |
1556 | pos += sizeof(__le32); | |
1557 | ||
1558 | /* antenna selection */ | |
1559 | pos += sizeof(u8); | |
1560 | ||
1561 | return pos; | |
1562 | } | |
1563 | ||
1564 | u8 *ieee80211_ie_build_ht_info(u8 *pos, | |
1565 | struct ieee80211_sta_ht_cap *ht_cap, | |
1566 | struct ieee80211_channel *channel, | |
1567 | enum nl80211_channel_type channel_type) | |
1568 | { | |
1569 | struct ieee80211_ht_info *ht_info; | |
1570 | /* Build HT Information */ | |
1571 | *pos++ = WLAN_EID_HT_INFORMATION; | |
1572 | *pos++ = sizeof(struct ieee80211_ht_info); | |
1573 | ht_info = (struct ieee80211_ht_info *)pos; | |
1574 | ht_info->control_chan = | |
1575 | ieee80211_frequency_to_channel(channel->center_freq); | |
1576 | switch (channel_type) { | |
1577 | case NL80211_CHAN_HT40MINUS: | |
1578 | ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1579 | break; | |
1580 | case NL80211_CHAN_HT40PLUS: | |
1581 | ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; | |
1582 | break; | |
1583 | case NL80211_CHAN_HT20: | |
1584 | default: | |
1585 | ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; | |
1586 | break; | |
1587 | } | |
1588 | if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) | |
1589 | ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; | |
ff3cc5f4 SW |
1590 | |
1591 | /* | |
1592 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and | |
1593 | * RIFS Mode are reserved in IBSS mode, therefore keep them at 0 | |
1594 | */ | |
42e7aa77 AS |
1595 | ht_info->operation_mode = 0x0000; |
1596 | ht_info->stbc_param = 0x0000; | |
1597 | ||
1598 | /* It seems that Basic MCS set and Supported MCS set | |
1599 | are identical for the first 10 bytes */ | |
1600 | memset(&ht_info->basic_set, 0, 16); | |
1601 | memcpy(&ht_info->basic_set, &ht_cap->mcs, 10); | |
1602 | ||
1603 | return pos + sizeof(struct ieee80211_ht_info); | |
1604 | } | |
1605 | ||
1606 | enum nl80211_channel_type | |
1607 | ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info) | |
1608 | { | |
1609 | enum nl80211_channel_type channel_type; | |
1610 | ||
1611 | if (!ht_info) | |
1612 | return NL80211_CHAN_NO_HT; | |
1613 | ||
1614 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
1615 | case IEEE80211_HT_PARAM_CHA_SEC_NONE: | |
1616 | channel_type = NL80211_CHAN_HT20; | |
1617 | break; | |
1618 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1619 | channel_type = NL80211_CHAN_HT40PLUS; | |
1620 | break; | |
1621 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1622 | channel_type = NL80211_CHAN_HT40MINUS; | |
1623 | break; | |
1624 | default: | |
1625 | channel_type = NL80211_CHAN_NO_HT; | |
1626 | } | |
1627 | ||
1628 | return channel_type; | |
1629 | } | |
1630 | ||
768db343 AN |
1631 | int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) |
1632 | { | |
1633 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1634 | struct ieee80211_local *local = sdata->local; | |
1635 | struct ieee80211_supported_band *sband; | |
1636 | int rate; | |
1637 | u8 i, rates, *pos; | |
1638 | ||
1639 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1640 | rates = sband->n_bitrates; | |
1641 | if (rates > 8) | |
1642 | rates = 8; | |
1643 | ||
1644 | if (skb_tailroom(skb) < rates + 2) | |
1645 | return -ENOMEM; | |
1646 | ||
1647 | pos = skb_put(skb, rates + 2); | |
1648 | *pos++ = WLAN_EID_SUPP_RATES; | |
1649 | *pos++ = rates; | |
1650 | for (i = 0; i < rates; i++) { | |
1651 | rate = sband->bitrates[i].bitrate; | |
1652 | *pos++ = (u8) (rate / 5); | |
1653 | } | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb) | |
1659 | { | |
1660 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1661 | struct ieee80211_local *local = sdata->local; | |
1662 | struct ieee80211_supported_band *sband; | |
1663 | int rate; | |
1664 | u8 i, exrates, *pos; | |
1665 | ||
1666 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1667 | exrates = sband->n_bitrates; | |
1668 | if (exrates > 8) | |
1669 | exrates -= 8; | |
1670 | else | |
1671 | exrates = 0; | |
1672 | ||
1673 | if (skb_tailroom(skb) < exrates + 2) | |
1674 | return -ENOMEM; | |
1675 | ||
1676 | if (exrates) { | |
1677 | pos = skb_put(skb, exrates + 2); | |
1678 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
1679 | *pos++ = exrates; | |
1680 | for (i = 8; i < sband->n_bitrates; i++) { | |
1681 | rate = sband->bitrates[i].bitrate; | |
1682 | *pos++ = (u8) (rate / 5); | |
1683 | } | |
1684 | } | |
1685 | return 0; | |
1686 | } |