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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> | |
21 | #include <linux/wireless.h> | |
22 | #include <linux/bitmap.h> | |
d91f36db | 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" |
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 | ||
38 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
39 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
c97c23e3 | 40 | const unsigned char rfc1042_header[] __aligned(2) = |
c2d1560a JB |
41 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
42 | ||
43 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
c97c23e3 | 44 | const unsigned char bridge_tunnel_header[] __aligned(2) = |
c2d1560a JB |
45 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
46 | ||
9a95371a LR |
47 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
48 | { | |
49 | struct ieee80211_local *local; | |
50 | BUG_ON(!wiphy); | |
51 | ||
52 | local = wiphy_priv(wiphy); | |
53 | return &local->hw; | |
54 | } | |
55 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 56 | |
71364716 | 57 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 58 | enum nl80211_iftype type) |
c2d1560a | 59 | { |
a494bb1c | 60 | __le16 fc = hdr->frame_control; |
c2d1560a | 61 | |
98f0b0a3 RR |
62 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
63 | if (len < 16) | |
c2d1560a JB |
64 | return NULL; |
65 | ||
a494bb1c | 66 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
67 | if (len < 24) /* drop incorrect hdr len (data) */ |
68 | return NULL; | |
a494bb1c HH |
69 | |
70 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 71 | return NULL; |
a494bb1c HH |
72 | if (ieee80211_has_tods(fc)) |
73 | return hdr->addr1; | |
74 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 75 | return hdr->addr2; |
a494bb1c HH |
76 | |
77 | return hdr->addr3; | |
78 | } | |
79 | ||
80 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
81 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
82 | return NULL; | |
c2d1560a | 83 | return hdr->addr3; |
a494bb1c HH |
84 | } |
85 | ||
86 | if (ieee80211_is_ctl(fc)) { | |
87 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 88 | return hdr->addr1; |
a494bb1c HH |
89 | |
90 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 91 | switch (type) { |
05c914fe | 92 | case NL80211_IFTYPE_STATION: |
71364716 | 93 | return hdr->addr2; |
05c914fe JB |
94 | case NL80211_IFTYPE_AP: |
95 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
96 | return hdr->addr1; |
97 | default: | |
a494bb1c | 98 | break; /* fall through to the return */ |
71364716 RR |
99 | } |
100 | } | |
c2d1560a JB |
101 | } |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
6693be71 HH |
106 | unsigned int ieee80211_hdrlen(__le16 fc) |
107 | { | |
108 | unsigned int hdrlen = 24; | |
109 | ||
110 | if (ieee80211_is_data(fc)) { | |
111 | if (ieee80211_has_a4(fc)) | |
112 | hdrlen = 30; | |
113 | if (ieee80211_is_data_qos(fc)) | |
114 | hdrlen += IEEE80211_QOS_CTL_LEN; | |
115 | goto out; | |
116 | } | |
117 | ||
118 | if (ieee80211_is_ctl(fc)) { | |
119 | /* | |
120 | * ACK and CTS are 10 bytes, all others 16. To see how | |
121 | * to get this condition consider | |
122 | * subtype mask: 0b0000000011110000 (0x00F0) | |
123 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
124 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
125 | * bits that matter: ^^^ (0x00E0) | |
126 | * value of those: 0b0000000011000000 (0x00C0) | |
127 | */ | |
128 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
129 | hdrlen = 10; | |
130 | else | |
131 | hdrlen = 16; | |
132 | } | |
133 | out: | |
134 | return hdrlen; | |
135 | } | |
136 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
137 | ||
c9c6950c | 138 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
c2d1560a | 139 | { |
c9c6950c HH |
140 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data; |
141 | unsigned int hdrlen; | |
c2d1560a JB |
142 | |
143 | if (unlikely(skb->len < 10)) | |
144 | return 0; | |
c9c6950c | 145 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
c2d1560a JB |
146 | if (unlikely(hdrlen > skb->len)) |
147 | return 0; | |
148 | return hdrlen; | |
149 | } | |
150 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
151 | ||
ee385855 LCC |
152 | int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
153 | { | |
154 | int ae = meshhdr->flags & IEEE80211S_FLAGS_AE; | |
155 | /* 7.1.3.5a.2 */ | |
156 | switch (ae) { | |
157 | case 0: | |
ef269254 | 158 | return 6; |
ee385855 | 159 | case 1: |
ef269254 | 160 | return 12; |
ee385855 | 161 | case 2: |
ef269254 | 162 | return 18; |
ee385855 | 163 | case 3: |
ef269254 | 164 | return 24; |
ee385855 | 165 | default: |
ef269254 | 166 | return 6; |
ee385855 LCC |
167 | } |
168 | } | |
ee385855 | 169 | |
5cf121c3 | 170 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a | 171 | { |
2de8e0d9 JB |
172 | struct sk_buff *skb = tx->skb; |
173 | struct ieee80211_hdr *hdr; | |
174 | ||
175 | do { | |
176 | hdr = (struct ieee80211_hdr *) skb->data; | |
177 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
178 | } while ((skb = skb->next)); | |
c2d1560a JB |
179 | } |
180 | ||
181 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
182 | int rate, int erp, int short_preamble) | |
183 | { | |
184 | int dur; | |
185 | ||
186 | /* calculate duration (in microseconds, rounded up to next higher | |
187 | * integer if it includes a fractional microsecond) to send frame of | |
188 | * len bytes (does not include FCS) at the given rate. Duration will | |
189 | * also include SIFS. | |
190 | * | |
191 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
192 | * DIV_ROUND_UP() operations. | |
193 | */ | |
194 | ||
8318d78a | 195 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
196 | /* |
197 | * OFDM: | |
198 | * | |
199 | * N_DBPS = DATARATE x 4 | |
200 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
201 | * (16 = SIGNAL time, 6 = tail bits) | |
202 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
203 | * | |
204 | * T_SYM = 4 usec | |
205 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
206 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
207 | * signal ext = 6 usec | |
208 | */ | |
c2d1560a JB |
209 | dur = 16; /* SIFS + signal ext */ |
210 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
211 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
212 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
213 | 4 * rate); /* T_SYM x N_SYM */ | |
214 | } else { | |
215 | /* | |
216 | * 802.11b or 802.11g with 802.11b compatibility: | |
217 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
218 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
219 | * | |
220 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
221 | * aSIFSTime = 10 usec | |
222 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
223 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
224 | */ | |
225 | dur = 10; /* aSIFSTime = 10 usec */ | |
226 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
227 | ||
228 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
229 | } | |
230 | ||
231 | return dur; | |
232 | } | |
233 | ||
234 | /* Exported duration function for driver use */ | |
32bfd35d JB |
235 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
236 | struct ieee80211_vif *vif, | |
8318d78a JB |
237 | size_t frame_len, |
238 | struct ieee80211_rate *rate) | |
c2d1560a JB |
239 | { |
240 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 241 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
242 | u16 dur; |
243 | int erp; | |
25d834e1 | 244 | bool short_preamble = false; |
c2d1560a | 245 | |
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 | } | |
8318d78a JB |
253 | |
254 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 255 | short_preamble); |
c2d1560a JB |
256 | |
257 | return cpu_to_le16(dur); | |
258 | } | |
259 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
260 | ||
32bfd35d JB |
261 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
262 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 263 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
264 | { |
265 | struct ieee80211_local *local = hw_to_local(hw); | |
266 | struct ieee80211_rate *rate; | |
25d834e1 | 267 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 268 | bool short_preamble; |
c2d1560a JB |
269 | int erp; |
270 | u16 dur; | |
2e92e6f2 JB |
271 | struct ieee80211_supported_band *sband; |
272 | ||
273 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 274 | |
25d834e1 | 275 | short_preamble = false; |
7e9ed188 | 276 | |
e039fa4a | 277 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
278 | |
279 | erp = 0; | |
25d834e1 JB |
280 | if (vif) { |
281 | sdata = vif_to_sdata(vif); | |
bda3933a | 282 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
283 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
284 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
285 | } | |
c2d1560a JB |
286 | |
287 | /* CTS duration */ | |
8318d78a | 288 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
289 | erp, short_preamble); |
290 | /* Data frame duration */ | |
8318d78a | 291 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
292 | erp, short_preamble); |
293 | /* ACK duration */ | |
8318d78a | 294 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
295 | erp, short_preamble); |
296 | ||
297 | return cpu_to_le16(dur); | |
298 | } | |
299 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
300 | ||
32bfd35d JB |
301 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
302 | struct ieee80211_vif *vif, | |
c2d1560a | 303 | size_t frame_len, |
e039fa4a | 304 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
305 | { |
306 | struct ieee80211_local *local = hw_to_local(hw); | |
307 | struct ieee80211_rate *rate; | |
25d834e1 | 308 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 309 | bool short_preamble; |
c2d1560a JB |
310 | int erp; |
311 | u16 dur; | |
2e92e6f2 JB |
312 | struct ieee80211_supported_band *sband; |
313 | ||
314 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 315 | |
25d834e1 | 316 | short_preamble = false; |
7e9ed188 | 317 | |
e039fa4a | 318 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 319 | erp = 0; |
25d834e1 JB |
320 | if (vif) { |
321 | sdata = vif_to_sdata(vif); | |
bda3933a | 322 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
323 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
324 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
325 | } | |
c2d1560a JB |
326 | |
327 | /* Data frame duration */ | |
8318d78a | 328 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 329 | erp, short_preamble); |
e039fa4a | 330 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 331 | /* ACK duration */ |
8318d78a | 332 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
333 | erp, short_preamble); |
334 | } | |
335 | ||
336 | return cpu_to_le16(dur); | |
337 | } | |
338 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
339 | ||
ce7c9111 KV |
340 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
341 | enum queue_stop_reason reason) | |
c2d1560a JB |
342 | { |
343 | struct ieee80211_local *local = hw_to_local(hw); | |
344 | ||
e4e72fb4 JB |
345 | if (WARN_ON(queue >= hw->queues)) |
346 | return; | |
ce7c9111 | 347 | |
96f5e66e JB |
348 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
349 | ||
2a577d98 JB |
350 | if (!skb_queue_empty(&local->pending[queue]) && |
351 | local->queue_stop_reasons[queue] == | |
352 | BIT(IEEE80211_QUEUE_STOP_REASON_PENDING)) | |
353 | tasklet_schedule(&local->tx_pending_tasklet); | |
354 | ||
96f5e66e JB |
355 | if (local->queue_stop_reasons[queue] != 0) |
356 | /* someone still has this queue stopped */ | |
357 | return; | |
358 | ||
2a577d98 | 359 | netif_wake_subqueue(local->mdev, queue); |
c2d1560a | 360 | } |
ce7c9111 | 361 | |
96f5e66e JB |
362 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
363 | enum queue_stop_reason reason) | |
ce7c9111 KV |
364 | { |
365 | struct ieee80211_local *local = hw_to_local(hw); | |
366 | unsigned long flags; | |
367 | ||
368 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
369 | __ieee80211_wake_queue(hw, queue, reason); | |
370 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
371 | } | |
372 | ||
373 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
374 | { | |
375 | ieee80211_wake_queue_by_reason(hw, queue, | |
376 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
377 | } | |
c2d1560a JB |
378 | EXPORT_SYMBOL(ieee80211_wake_queue); |
379 | ||
ce7c9111 KV |
380 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
381 | enum queue_stop_reason reason) | |
c2d1560a JB |
382 | { |
383 | struct ieee80211_local *local = hw_to_local(hw); | |
384 | ||
e4e72fb4 JB |
385 | if (WARN_ON(queue >= hw->queues)) |
386 | return; | |
96f5e66e | 387 | |
2a577d98 JB |
388 | /* |
389 | * Only stop if it was previously running, this is necessary | |
390 | * for correct pending packets handling because there we may | |
391 | * start (but not wake) the queue and rely on that. | |
392 | */ | |
393 | if (!local->queue_stop_reasons[queue]) | |
394 | netif_stop_subqueue(local->mdev, queue); | |
ce7c9111 | 395 | |
2a577d98 | 396 | __set_bit(reason, &local->queue_stop_reasons[queue]); |
c2d1560a | 397 | } |
ce7c9111 | 398 | |
96f5e66e JB |
399 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
400 | enum queue_stop_reason reason) | |
ce7c9111 KV |
401 | { |
402 | struct ieee80211_local *local = hw_to_local(hw); | |
403 | unsigned long flags; | |
404 | ||
405 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
406 | __ieee80211_stop_queue(hw, queue, reason); | |
407 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
408 | } | |
409 | ||
410 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
411 | { | |
412 | ieee80211_stop_queue_by_reason(hw, queue, | |
413 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
414 | } | |
c2d1560a JB |
415 | EXPORT_SYMBOL(ieee80211_stop_queue); |
416 | ||
ce7c9111 KV |
417 | void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, |
418 | enum queue_stop_reason reason) | |
c2d1560a | 419 | { |
ce7c9111 KV |
420 | struct ieee80211_local *local = hw_to_local(hw); |
421 | unsigned long flags; | |
c2d1560a JB |
422 | int i; |
423 | ||
ce7c9111 KV |
424 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
425 | ||
96f5e66e | 426 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
427 | __ieee80211_stop_queue(hw, i, reason); |
428 | ||
429 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
430 | } | |
431 | ||
432 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
433 | { | |
434 | ieee80211_stop_queues_by_reason(hw, | |
435 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
436 | } |
437 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
438 | ||
92ab8535 TW |
439 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
440 | { | |
441 | struct ieee80211_local *local = hw_to_local(hw); | |
96f5e66e | 442 | |
e4e72fb4 JB |
443 | if (WARN_ON(queue >= hw->queues)) |
444 | return true; | |
96f5e66e | 445 | |
92ab8535 TW |
446 | return __netif_subqueue_stopped(local->mdev, queue); |
447 | } | |
448 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
449 | ||
ce7c9111 KV |
450 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
451 | enum queue_stop_reason reason) | |
c2d1560a | 452 | { |
ce7c9111 KV |
453 | struct ieee80211_local *local = hw_to_local(hw); |
454 | unsigned long flags; | |
c2d1560a JB |
455 | int i; |
456 | ||
ce7c9111 KV |
457 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
458 | ||
e4e72fb4 | 459 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
460 | __ieee80211_wake_queue(hw, i, reason); |
461 | ||
462 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
463 | } | |
464 | ||
465 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
466 | { | |
467 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
468 | } |
469 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 470 | |
32bfd35d JB |
471 | void ieee80211_iterate_active_interfaces( |
472 | struct ieee80211_hw *hw, | |
473 | void (*iterator)(void *data, u8 *mac, | |
474 | struct ieee80211_vif *vif), | |
475 | void *data) | |
dabeb344 JB |
476 | { |
477 | struct ieee80211_local *local = hw_to_local(hw); | |
478 | struct ieee80211_sub_if_data *sdata; | |
479 | ||
c771c9d8 | 480 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
481 | |
482 | list_for_each_entry(sdata, &local->interfaces, list) { | |
483 | switch (sdata->vif.type) { | |
05c914fe JB |
484 | case __NL80211_IFTYPE_AFTER_LAST: |
485 | case NL80211_IFTYPE_UNSPECIFIED: | |
486 | case NL80211_IFTYPE_MONITOR: | |
487 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 488 | continue; |
05c914fe JB |
489 | case NL80211_IFTYPE_AP: |
490 | case NL80211_IFTYPE_STATION: | |
491 | case NL80211_IFTYPE_ADHOC: | |
492 | case NL80211_IFTYPE_WDS: | |
493 | case NL80211_IFTYPE_MESH_POINT: | |
2f561feb ID |
494 | break; |
495 | } | |
2f561feb ID |
496 | if (netif_running(sdata->dev)) |
497 | iterator(data, sdata->dev->dev_addr, | |
498 | &sdata->vif); | |
499 | } | |
500 | ||
c771c9d8 | 501 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
502 | } |
503 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
504 | ||
505 | void ieee80211_iterate_active_interfaces_atomic( | |
506 | struct ieee80211_hw *hw, | |
507 | void (*iterator)(void *data, u8 *mac, | |
508 | struct ieee80211_vif *vif), | |
509 | void *data) | |
510 | { | |
511 | struct ieee80211_local *local = hw_to_local(hw); | |
512 | struct ieee80211_sub_if_data *sdata; | |
513 | ||
e38bad47 | 514 | rcu_read_lock(); |
dabeb344 | 515 | |
e38bad47 | 516 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 517 | switch (sdata->vif.type) { |
05c914fe JB |
518 | case __NL80211_IFTYPE_AFTER_LAST: |
519 | case NL80211_IFTYPE_UNSPECIFIED: | |
520 | case NL80211_IFTYPE_MONITOR: | |
521 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 522 | continue; |
05c914fe JB |
523 | case NL80211_IFTYPE_AP: |
524 | case NL80211_IFTYPE_STATION: | |
525 | case NL80211_IFTYPE_ADHOC: | |
526 | case NL80211_IFTYPE_WDS: | |
527 | case NL80211_IFTYPE_MESH_POINT: | |
dabeb344 JB |
528 | break; |
529 | } | |
dabeb344 JB |
530 | if (netif_running(sdata->dev)) |
531 | iterator(data, sdata->dev->dev_addr, | |
32bfd35d | 532 | &sdata->vif); |
dabeb344 | 533 | } |
e38bad47 JB |
534 | |
535 | rcu_read_unlock(); | |
dabeb344 | 536 | } |
2f561feb | 537 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da JB |
538 | |
539 | void ieee802_11_parse_elems(u8 *start, size_t len, | |
540 | struct ieee802_11_elems *elems) | |
d91f36db JB |
541 | { |
542 | ieee802_11_parse_elems_crc(start, len, elems, 0, 0); | |
543 | } | |
544 | ||
545 | u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, | |
546 | struct ieee802_11_elems *elems, | |
547 | u64 filter, u32 crc) | |
37ffc8da JB |
548 | { |
549 | size_t left = len; | |
550 | u8 *pos = start; | |
d91f36db | 551 | bool calc_crc = filter != 0; |
37ffc8da JB |
552 | |
553 | memset(elems, 0, sizeof(*elems)); | |
554 | elems->ie_start = start; | |
555 | elems->total_len = len; | |
556 | ||
557 | while (left >= 2) { | |
558 | u8 id, elen; | |
559 | ||
560 | id = *pos++; | |
561 | elen = *pos++; | |
562 | left -= 2; | |
563 | ||
564 | if (elen > left) | |
d91f36db JB |
565 | break; |
566 | ||
567 | if (calc_crc && id < 64 && (filter & BIT(id))) | |
568 | crc = crc32_be(crc, pos - 2, elen + 2); | |
37ffc8da JB |
569 | |
570 | switch (id) { | |
571 | case WLAN_EID_SSID: | |
572 | elems->ssid = pos; | |
573 | elems->ssid_len = elen; | |
574 | break; | |
575 | case WLAN_EID_SUPP_RATES: | |
576 | elems->supp_rates = pos; | |
577 | elems->supp_rates_len = elen; | |
578 | break; | |
579 | case WLAN_EID_FH_PARAMS: | |
580 | elems->fh_params = pos; | |
581 | elems->fh_params_len = elen; | |
582 | break; | |
583 | case WLAN_EID_DS_PARAMS: | |
584 | elems->ds_params = pos; | |
585 | elems->ds_params_len = elen; | |
586 | break; | |
587 | case WLAN_EID_CF_PARAMS: | |
588 | elems->cf_params = pos; | |
589 | elems->cf_params_len = elen; | |
590 | break; | |
591 | case WLAN_EID_TIM: | |
e7ec86f5 JB |
592 | if (elen >= sizeof(struct ieee80211_tim_ie)) { |
593 | elems->tim = (void *)pos; | |
594 | elems->tim_len = elen; | |
595 | } | |
37ffc8da JB |
596 | break; |
597 | case WLAN_EID_IBSS_PARAMS: | |
598 | elems->ibss_params = pos; | |
599 | elems->ibss_params_len = elen; | |
600 | break; | |
601 | case WLAN_EID_CHALLENGE: | |
602 | elems->challenge = pos; | |
603 | elems->challenge_len = elen; | |
604 | break; | |
d91f36db | 605 | case WLAN_EID_VENDOR_SPECIFIC: |
37ffc8da JB |
606 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && |
607 | pos[2] == 0xf2) { | |
608 | /* Microsoft OUI (00:50:F2) */ | |
d91f36db JB |
609 | |
610 | if (calc_crc) | |
611 | crc = crc32_be(crc, pos - 2, elen + 2); | |
612 | ||
37ffc8da JB |
613 | if (pos[3] == 1) { |
614 | /* OUI Type 1 - WPA IE */ | |
615 | elems->wpa = pos; | |
616 | elems->wpa_len = elen; | |
617 | } else if (elen >= 5 && pos[3] == 2) { | |
d91f36db | 618 | /* OUI Type 2 - WMM IE */ |
37ffc8da JB |
619 | if (pos[4] == 0) { |
620 | elems->wmm_info = pos; | |
621 | elems->wmm_info_len = elen; | |
622 | } else if (pos[4] == 1) { | |
623 | elems->wmm_param = pos; | |
624 | elems->wmm_param_len = elen; | |
625 | } | |
626 | } | |
627 | } | |
628 | break; | |
629 | case WLAN_EID_RSN: | |
630 | elems->rsn = pos; | |
631 | elems->rsn_len = elen; | |
632 | break; | |
633 | case WLAN_EID_ERP_INFO: | |
634 | elems->erp_info = pos; | |
635 | elems->erp_info_len = elen; | |
636 | break; | |
637 | case WLAN_EID_EXT_SUPP_RATES: | |
638 | elems->ext_supp_rates = pos; | |
639 | elems->ext_supp_rates_len = elen; | |
640 | break; | |
641 | case WLAN_EID_HT_CAPABILITY: | |
09914813 JB |
642 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
643 | elems->ht_cap_elem = (void *)pos; | |
37ffc8da | 644 | break; |
d9fe60de JB |
645 | case WLAN_EID_HT_INFORMATION: |
646 | if (elen >= sizeof(struct ieee80211_ht_info)) | |
09914813 | 647 | elems->ht_info_elem = (void *)pos; |
37ffc8da JB |
648 | break; |
649 | case WLAN_EID_MESH_ID: | |
650 | elems->mesh_id = pos; | |
651 | elems->mesh_id_len = elen; | |
652 | break; | |
653 | case WLAN_EID_MESH_CONFIG: | |
654 | elems->mesh_config = pos; | |
655 | elems->mesh_config_len = elen; | |
656 | break; | |
657 | case WLAN_EID_PEER_LINK: | |
658 | elems->peer_link = pos; | |
659 | elems->peer_link_len = elen; | |
660 | break; | |
661 | case WLAN_EID_PREQ: | |
662 | elems->preq = pos; | |
663 | elems->preq_len = elen; | |
664 | break; | |
665 | case WLAN_EID_PREP: | |
666 | elems->prep = pos; | |
667 | elems->prep_len = elen; | |
668 | break; | |
669 | case WLAN_EID_PERR: | |
670 | elems->perr = pos; | |
671 | elems->perr_len = elen; | |
672 | break; | |
673 | case WLAN_EID_CHANNEL_SWITCH: | |
674 | elems->ch_switch_elem = pos; | |
675 | elems->ch_switch_elem_len = elen; | |
676 | break; | |
677 | case WLAN_EID_QUIET: | |
678 | if (!elems->quiet_elem) { | |
679 | elems->quiet_elem = pos; | |
680 | elems->quiet_elem_len = elen; | |
681 | } | |
682 | elems->num_of_quiet_elem++; | |
683 | break; | |
684 | case WLAN_EID_COUNTRY: | |
685 | elems->country_elem = pos; | |
686 | elems->country_elem_len = elen; | |
687 | break; | |
688 | case WLAN_EID_PWR_CONSTRAINT: | |
689 | elems->pwr_constr_elem = pos; | |
690 | elems->pwr_constr_elem_len = elen; | |
691 | break; | |
f797eb7e JM |
692 | case WLAN_EID_TIMEOUT_INTERVAL: |
693 | elems->timeout_int = pos; | |
694 | elems->timeout_int_len = elen; | |
63a5ab82 | 695 | break; |
37ffc8da JB |
696 | default: |
697 | break; | |
698 | } | |
699 | ||
700 | left -= elen; | |
701 | pos += elen; | |
702 | } | |
d91f36db JB |
703 | |
704 | return crc; | |
37ffc8da | 705 | } |
5825fe10 JB |
706 | |
707 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) | |
708 | { | |
709 | struct ieee80211_local *local = sdata->local; | |
710 | struct ieee80211_tx_queue_params qparam; | |
aa837e1d JB |
711 | int queue; |
712 | bool use_11b; | |
713 | int aCWmin, aCWmax; | |
5825fe10 JB |
714 | |
715 | if (!local->ops->conf_tx) | |
716 | return; | |
717 | ||
718 | memset(&qparam, 0, sizeof(qparam)); | |
719 | ||
aa837e1d JB |
720 | use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) && |
721 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); | |
5825fe10 | 722 | |
aa837e1d JB |
723 | for (queue = 0; queue < local_to_hw(local)->queues; queue++) { |
724 | /* Set defaults according to 802.11-2007 Table 7-37 */ | |
725 | aCWmax = 1023; | |
726 | if (use_11b) | |
727 | aCWmin = 31; | |
728 | else | |
729 | aCWmin = 15; | |
730 | ||
731 | switch (queue) { | |
732 | case 3: /* AC_BK */ | |
733 | qparam.cw_max = aCWmin; | |
734 | qparam.cw_min = aCWmax; | |
735 | qparam.txop = 0; | |
736 | qparam.aifs = 7; | |
737 | break; | |
738 | default: /* never happens but let's not leave undefined */ | |
739 | case 2: /* AC_BE */ | |
740 | qparam.cw_max = aCWmin; | |
741 | qparam.cw_min = aCWmax; | |
742 | qparam.txop = 0; | |
743 | qparam.aifs = 3; | |
744 | break; | |
745 | case 1: /* AC_VI */ | |
746 | qparam.cw_max = aCWmin; | |
747 | qparam.cw_min = (aCWmin + 1) / 2 - 1; | |
748 | if (use_11b) | |
749 | qparam.txop = 6016/32; | |
750 | else | |
751 | qparam.txop = 3008/32; | |
752 | qparam.aifs = 2; | |
753 | break; | |
754 | case 0: /* AC_VO */ | |
755 | qparam.cw_max = (aCWmin + 1) / 2 - 1; | |
756 | qparam.cw_min = (aCWmin + 1) / 4 - 1; | |
757 | if (use_11b) | |
758 | qparam.txop = 3264/32; | |
759 | else | |
760 | qparam.txop = 1504/32; | |
761 | qparam.aifs = 2; | |
762 | break; | |
763 | } | |
5825fe10 | 764 | |
aa837e1d JB |
765 | drv_conf_tx(local, queue, &qparam); |
766 | } | |
5825fe10 | 767 | } |
e50db65c | 768 | |
46900298 JB |
769 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
770 | const size_t supp_rates_len, | |
771 | const u8 *supp_rates) | |
772 | { | |
773 | struct ieee80211_local *local = sdata->local; | |
774 | int i, have_higher_than_11mbit = 0; | |
775 | ||
776 | /* cf. IEEE 802.11 9.2.12 */ | |
777 | for (i = 0; i < supp_rates_len; i++) | |
778 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
779 | have_higher_than_11mbit = 1; | |
780 | ||
781 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
782 | have_higher_than_11mbit) | |
783 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
784 | else | |
785 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
786 | ||
787 | ieee80211_set_wmm_default(sdata); | |
788 | } | |
789 | ||
e50db65c JB |
790 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
791 | int encrypt) | |
792 | { | |
793 | skb->dev = sdata->local->mdev; | |
794 | skb_set_mac_header(skb, 0); | |
795 | skb_set_network_header(skb, 0); | |
796 | skb_set_transport_header(skb, 0); | |
797 | ||
798 | skb->iif = sdata->dev->ifindex; | |
799 | skb->do_not_encrypt = !encrypt; | |
800 | ||
801 | dev_queue_xmit(skb); | |
802 | } | |
e16751c3 JB |
803 | |
804 | int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) | |
805 | { | |
806 | int ret = -EINVAL; | |
807 | struct ieee80211_channel *chan; | |
808 | struct ieee80211_local *local = sdata->local; | |
809 | ||
810 | chan = ieee80211_get_channel(local->hw.wiphy, freqMHz); | |
811 | ||
812 | if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { | |
05c914fe | 813 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
d73782fd | 814 | chan->flags & IEEE80211_CHAN_NO_IBSS) |
e16751c3 | 815 | return ret; |
e16751c3 | 816 | local->oper_channel = chan; |
094d05dc | 817 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e16751c3 | 818 | |
c2b13452 | 819 | if (local->sw_scanning || local->hw_scanning) |
e16751c3 JB |
820 | ret = 0; |
821 | else | |
e8975581 JB |
822 | ret = ieee80211_hw_config( |
823 | local, IEEE80211_CONF_CHANGE_CHANNEL); | |
e16751c3 JB |
824 | } |
825 | ||
826 | return ret; | |
827 | } | |
96dd22ac | 828 | |
881d948c | 829 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
830 | enum ieee80211_band band) |
831 | { | |
832 | struct ieee80211_supported_band *sband; | |
833 | struct ieee80211_rate *bitrates; | |
881d948c | 834 | u32 mandatory_rates; |
96dd22ac JB |
835 | enum ieee80211_rate_flags mandatory_flag; |
836 | int i; | |
837 | ||
838 | sband = local->hw.wiphy->bands[band]; | |
839 | if (!sband) { | |
840 | WARN_ON(1); | |
841 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
842 | } | |
843 | ||
844 | if (band == IEEE80211_BAND_2GHZ) | |
845 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
846 | else | |
847 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
848 | ||
849 | bitrates = sband->bitrates; | |
850 | mandatory_rates = 0; | |
851 | for (i = 0; i < sband->n_bitrates; i++) | |
852 | if (bitrates[i].flags & mandatory_flag) | |
853 | mandatory_rates |= BIT(i); | |
854 | return mandatory_rates; | |
855 | } | |
46900298 JB |
856 | |
857 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
858 | u16 transaction, u16 auth_alg, | |
859 | u8 *extra, size_t extra_len, | |
860 | const u8 *bssid, int encrypt) | |
861 | { | |
862 | struct ieee80211_local *local = sdata->local; | |
863 | struct sk_buff *skb; | |
864 | struct ieee80211_mgmt *mgmt; | |
46900298 JB |
865 | |
866 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
65fc73ac | 867 | sizeof(*mgmt) + 6 + extra_len); |
46900298 JB |
868 | if (!skb) { |
869 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
870 | "frame\n", sdata->dev->name); | |
871 | return; | |
872 | } | |
873 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
874 | ||
875 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
876 | memset(mgmt, 0, 24 + 6); | |
877 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
878 | IEEE80211_STYPE_AUTH); | |
879 | if (encrypt) | |
880 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
881 | memcpy(mgmt->da, bssid, ETH_ALEN); | |
882 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
883 | memcpy(mgmt->bssid, bssid, ETH_ALEN); | |
884 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
885 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
886 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
887 | if (extra) | |
888 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
46900298 JB |
889 | |
890 | ieee80211_tx_skb(sdata, skb, encrypt); | |
891 | } | |
892 | ||
de95a54b JB |
893 | int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, |
894 | const u8 *ie, size_t ie_len) | |
895 | { | |
896 | struct ieee80211_supported_band *sband; | |
897 | u8 *pos, *supp_rates_len, *esupp_rates_len = NULL; | |
898 | int i; | |
899 | ||
900 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
901 | ||
902 | pos = buffer; | |
903 | ||
904 | *pos++ = WLAN_EID_SUPP_RATES; | |
905 | supp_rates_len = pos; | |
906 | *pos++ = 0; | |
907 | ||
908 | for (i = 0; i < sband->n_bitrates; i++) { | |
909 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
910 | ||
911 | if (esupp_rates_len) { | |
912 | *esupp_rates_len += 1; | |
913 | } else if (*supp_rates_len == 8) { | |
914 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
915 | esupp_rates_len = pos; | |
916 | *pos++ = 1; | |
917 | } else | |
918 | *supp_rates_len += 1; | |
919 | ||
920 | *pos++ = rate->bitrate / 5; | |
921 | } | |
922 | ||
5ef2d41a JB |
923 | if (sband->ht_cap.ht_supported) { |
924 | __le16 tmp = cpu_to_le16(sband->ht_cap.cap); | |
925 | ||
926 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
927 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
928 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
929 | memcpy(pos, &tmp, sizeof(u16)); | |
930 | pos += sizeof(u16); | |
931 | /* TODO: needs a define here for << 2 */ | |
932 | *pos++ = sband->ht_cap.ampdu_factor | | |
933 | (sband->ht_cap.ampdu_density << 2); | |
934 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
935 | pos += sizeof(sband->ht_cap.mcs); | |
936 | pos += 2 + 4 + 1; /* ext info, BF cap, antsel */ | |
937 | } | |
938 | ||
de95a54b JB |
939 | /* |
940 | * If adding more here, adjust code in main.c | |
941 | * that calculates local->scan_ies_len. | |
942 | */ | |
943 | ||
944 | if (ie) { | |
945 | memcpy(pos, ie, ie_len); | |
946 | pos += ie_len; | |
947 | } | |
948 | ||
949 | return pos - buffer; | |
950 | } | |
951 | ||
46900298 | 952 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
de95a54b JB |
953 | const u8 *ssid, size_t ssid_len, |
954 | const u8 *ie, size_t ie_len) | |
46900298 JB |
955 | { |
956 | struct ieee80211_local *local = sdata->local; | |
46900298 JB |
957 | struct sk_buff *skb; |
958 | struct ieee80211_mgmt *mgmt; | |
de95a54b | 959 | u8 *pos; |
46900298 JB |
960 | |
961 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 + | |
65fc73ac | 962 | ie_len); |
46900298 JB |
963 | if (!skb) { |
964 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
965 | "request\n", sdata->dev->name); | |
966 | return; | |
967 | } | |
968 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
969 | ||
970 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
971 | memset(mgmt, 0, 24); | |
972 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
973 | IEEE80211_STYPE_PROBE_REQ); | |
974 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
975 | if (dst) { | |
976 | memcpy(mgmt->da, dst, ETH_ALEN); | |
977 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
978 | } else { | |
979 | memset(mgmt->da, 0xff, ETH_ALEN); | |
980 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
981 | } | |
982 | pos = skb_put(skb, 2 + ssid_len); | |
983 | *pos++ = WLAN_EID_SSID; | |
984 | *pos++ = ssid_len; | |
985 | memcpy(pos, ssid, ssid_len); | |
de95a54b | 986 | pos += ssid_len; |
46900298 | 987 | |
de95a54b | 988 | skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len)); |
46900298 JB |
989 | |
990 | ieee80211_tx_skb(sdata, skb, 0); | |
991 | } | |
992 | ||
993 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
994 | struct ieee802_11_elems *elems, | |
995 | enum ieee80211_band band) | |
996 | { | |
997 | struct ieee80211_supported_band *sband; | |
998 | struct ieee80211_rate *bitrates; | |
999 | size_t num_rates; | |
1000 | u32 supp_rates; | |
1001 | int i, j; | |
1002 | sband = local->hw.wiphy->bands[band]; | |
1003 | ||
1004 | if (!sband) { | |
1005 | WARN_ON(1); | |
1006 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1007 | } | |
1008 | ||
1009 | bitrates = sband->bitrates; | |
1010 | num_rates = sband->n_bitrates; | |
1011 | supp_rates = 0; | |
1012 | for (i = 0; i < elems->supp_rates_len + | |
1013 | elems->ext_supp_rates_len; i++) { | |
1014 | u8 rate = 0; | |
1015 | int own_rate; | |
1016 | if (i < elems->supp_rates_len) | |
1017 | rate = elems->supp_rates[i]; | |
1018 | else if (elems->ext_supp_rates) | |
1019 | rate = elems->ext_supp_rates | |
1020 | [i - elems->supp_rates_len]; | |
1021 | own_rate = 5 * (rate & 0x7f); | |
1022 | for (j = 0; j < num_rates; j++) | |
1023 | if (bitrates[j].bitrate == own_rate) | |
1024 | supp_rates |= BIT(j); | |
1025 | } | |
1026 | return supp_rates; | |
1027 | } | |
f2753ddb JB |
1028 | |
1029 | int ieee80211_reconfig(struct ieee80211_local *local) | |
1030 | { | |
1031 | struct ieee80211_hw *hw = &local->hw; | |
1032 | struct ieee80211_sub_if_data *sdata; | |
1033 | struct ieee80211_if_init_conf conf; | |
1034 | struct sta_info *sta; | |
1035 | unsigned long flags; | |
1036 | int res; | |
1037 | ||
1038 | /* restart hardware */ | |
1039 | if (local->open_count) { | |
24487981 | 1040 | res = drv_start(local); |
f2753ddb JB |
1041 | |
1042 | ieee80211_led_radio(local, hw->conf.radio_enabled); | |
1043 | } | |
1044 | ||
1045 | /* add interfaces */ | |
1046 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1047 | if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
1048 | sdata->vif.type != NL80211_IFTYPE_MONITOR && | |
1049 | netif_running(sdata->dev)) { | |
1050 | conf.vif = &sdata->vif; | |
1051 | conf.type = sdata->vif.type; | |
1052 | conf.mac_addr = sdata->dev->dev_addr; | |
24487981 | 1053 | res = drv_add_interface(local, &conf); |
f2753ddb JB |
1054 | } |
1055 | } | |
1056 | ||
1057 | /* add STAs back */ | |
1058 | if (local->ops->sta_notify) { | |
1059 | spin_lock_irqsave(&local->sta_lock, flags); | |
1060 | list_for_each_entry(sta, &local->sta_list, list) { | |
1061 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1062 | sdata = container_of(sdata->bss, | |
1063 | struct ieee80211_sub_if_data, | |
1064 | u.ap); | |
1065 | ||
24487981 JB |
1066 | drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD, |
1067 | &sta->sta); | |
f2753ddb JB |
1068 | } |
1069 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
1070 | } | |
1071 | ||
1072 | /* Clear Suspend state so that ADDBA requests can be processed */ | |
1073 | ||
1074 | rcu_read_lock(); | |
1075 | ||
1076 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
1077 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
1078 | clear_sta_flags(sta, WLAN_STA_SUSPEND); | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | rcu_read_unlock(); | |
1083 | ||
1084 | /* setup RTS threshold */ | |
24487981 | 1085 | drv_set_rts_threshold(local, hw->wiphy->rts_threshold); |
f2753ddb JB |
1086 | |
1087 | /* reconfigure hardware */ | |
1088 | ieee80211_hw_config(local, ~0); | |
1089 | ||
1090 | netif_addr_lock_bh(local->mdev); | |
1091 | ieee80211_configure_filter(local); | |
1092 | netif_addr_unlock_bh(local->mdev); | |
1093 | ||
1094 | /* Finally also reconfigure all the BSS information */ | |
1095 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1096 | u32 changed = ~0; | |
1097 | if (!netif_running(sdata->dev)) | |
1098 | continue; | |
1099 | switch (sdata->vif.type) { | |
1100 | case NL80211_IFTYPE_STATION: | |
1101 | /* disable beacon change bits */ | |
2d0ddec5 JB |
1102 | changed &= ~(BSS_CHANGED_BEACON | |
1103 | BSS_CHANGED_BEACON_ENABLED); | |
f2753ddb JB |
1104 | /* fall through */ |
1105 | case NL80211_IFTYPE_ADHOC: | |
1106 | case NL80211_IFTYPE_AP: | |
1107 | case NL80211_IFTYPE_MESH_POINT: | |
2d0ddec5 | 1108 | ieee80211_bss_info_change_notify(sdata, changed); |
f2753ddb JB |
1109 | break; |
1110 | case NL80211_IFTYPE_WDS: | |
1111 | break; | |
1112 | case NL80211_IFTYPE_AP_VLAN: | |
1113 | case NL80211_IFTYPE_MONITOR: | |
1114 | /* ignore virtual */ | |
1115 | break; | |
1116 | case NL80211_IFTYPE_UNSPECIFIED: | |
1117 | case __NL80211_IFTYPE_AFTER_LAST: | |
1118 | WARN_ON(1); | |
1119 | break; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* add back keys */ | |
1124 | list_for_each_entry(sdata, &local->interfaces, list) | |
1125 | if (netif_running(sdata->dev)) | |
1126 | ieee80211_enable_keys(sdata); | |
1127 | ||
1128 | ieee80211_wake_queues_by_reason(hw, | |
1129 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
1130 | ||
1131 | return 0; | |
1132 | } |