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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> | |
881d966b | 23 | #include <net/net_namespace.h> |
c2d1560a | 24 | #include <net/cfg80211.h> |
dabeb344 | 25 | #include <net/rtnetlink.h> |
c2d1560a JB |
26 | |
27 | #include "ieee80211_i.h" | |
2c8dccc7 | 28 | #include "rate.h" |
ee385855 | 29 | #include "mesh.h" |
c2d1560a JB |
30 | #include "wme.h" |
31 | ||
32 | /* privid for wiphys to determine whether they belong to us or not */ | |
33 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
34 | ||
35 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
36 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
c97c23e3 | 37 | const unsigned char rfc1042_header[] __aligned(2) = |
c2d1560a JB |
38 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
39 | ||
40 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
c97c23e3 | 41 | const unsigned char bridge_tunnel_header[] __aligned(2) = |
c2d1560a JB |
42 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
43 | ||
9a95371a LR |
44 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) |
45 | { | |
46 | struct ieee80211_local *local; | |
47 | BUG_ON(!wiphy); | |
48 | ||
49 | local = wiphy_priv(wiphy); | |
50 | return &local->hw; | |
51 | } | |
52 | EXPORT_SYMBOL(wiphy_to_ieee80211_hw); | |
c2d1560a | 53 | |
71364716 | 54 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
05c914fe | 55 | enum nl80211_iftype type) |
c2d1560a | 56 | { |
a494bb1c | 57 | __le16 fc = hdr->frame_control; |
c2d1560a | 58 | |
98f0b0a3 RR |
59 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
60 | if (len < 16) | |
c2d1560a JB |
61 | return NULL; |
62 | ||
a494bb1c | 63 | if (ieee80211_is_data(fc)) { |
98f0b0a3 RR |
64 | if (len < 24) /* drop incorrect hdr len (data) */ |
65 | return NULL; | |
a494bb1c HH |
66 | |
67 | if (ieee80211_has_a4(fc)) | |
c2d1560a | 68 | return NULL; |
a494bb1c HH |
69 | if (ieee80211_has_tods(fc)) |
70 | return hdr->addr1; | |
71 | if (ieee80211_has_fromds(fc)) | |
c2d1560a | 72 | return hdr->addr2; |
a494bb1c HH |
73 | |
74 | return hdr->addr3; | |
75 | } | |
76 | ||
77 | if (ieee80211_is_mgmt(fc)) { | |
98f0b0a3 RR |
78 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
79 | return NULL; | |
c2d1560a | 80 | return hdr->addr3; |
a494bb1c HH |
81 | } |
82 | ||
83 | if (ieee80211_is_ctl(fc)) { | |
84 | if(ieee80211_is_pspoll(fc)) | |
c2d1560a | 85 | return hdr->addr1; |
a494bb1c HH |
86 | |
87 | if (ieee80211_is_back_req(fc)) { | |
71364716 | 88 | switch (type) { |
05c914fe | 89 | case NL80211_IFTYPE_STATION: |
71364716 | 90 | return hdr->addr2; |
05c914fe JB |
91 | case NL80211_IFTYPE_AP: |
92 | case NL80211_IFTYPE_AP_VLAN: | |
71364716 RR |
93 | return hdr->addr1; |
94 | default: | |
a494bb1c | 95 | break; /* fall through to the return */ |
71364716 RR |
96 | } |
97 | } | |
c2d1560a JB |
98 | } |
99 | ||
100 | return NULL; | |
101 | } | |
102 | ||
6693be71 HH |
103 | unsigned int ieee80211_hdrlen(__le16 fc) |
104 | { | |
105 | unsigned int hdrlen = 24; | |
106 | ||
107 | if (ieee80211_is_data(fc)) { | |
108 | if (ieee80211_has_a4(fc)) | |
109 | hdrlen = 30; | |
110 | if (ieee80211_is_data_qos(fc)) | |
111 | hdrlen += IEEE80211_QOS_CTL_LEN; | |
112 | goto out; | |
113 | } | |
114 | ||
115 | if (ieee80211_is_ctl(fc)) { | |
116 | /* | |
117 | * ACK and CTS are 10 bytes, all others 16. To see how | |
118 | * to get this condition consider | |
119 | * subtype mask: 0b0000000011110000 (0x00F0) | |
120 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
121 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
122 | * bits that matter: ^^^ (0x00E0) | |
123 | * value of those: 0b0000000011000000 (0x00C0) | |
124 | */ | |
125 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
126 | hdrlen = 10; | |
127 | else | |
128 | hdrlen = 16; | |
129 | } | |
130 | out: | |
131 | return hdrlen; | |
132 | } | |
133 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
134 | ||
c9c6950c | 135 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
c2d1560a | 136 | { |
c9c6950c HH |
137 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data; |
138 | unsigned int hdrlen; | |
c2d1560a JB |
139 | |
140 | if (unlikely(skb->len < 10)) | |
141 | return 0; | |
c9c6950c | 142 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
c2d1560a JB |
143 | if (unlikely(hdrlen > skb->len)) |
144 | return 0; | |
145 | return hdrlen; | |
146 | } | |
147 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
148 | ||
ee385855 LCC |
149 | int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
150 | { | |
151 | int ae = meshhdr->flags & IEEE80211S_FLAGS_AE; | |
152 | /* 7.1.3.5a.2 */ | |
153 | switch (ae) { | |
154 | case 0: | |
ef269254 | 155 | return 6; |
ee385855 | 156 | case 1: |
ef269254 | 157 | return 12; |
ee385855 | 158 | case 2: |
ef269254 | 159 | return 18; |
ee385855 | 160 | case 3: |
ef269254 | 161 | return 24; |
ee385855 | 162 | default: |
ef269254 | 163 | return 6; |
ee385855 LCC |
164 | } |
165 | } | |
ee385855 | 166 | |
5cf121c3 | 167 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a JB |
168 | { |
169 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
170 | ||
171 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
5cf121c3 | 172 | if (tx->extra_frag) { |
c2d1560a JB |
173 | struct ieee80211_hdr *fhdr; |
174 | int i; | |
5cf121c3 | 175 | for (i = 0; i < tx->num_extra_frag; i++) { |
c2d1560a | 176 | fhdr = (struct ieee80211_hdr *) |
5cf121c3 | 177 | tx->extra_frag[i]->data; |
c2d1560a JB |
178 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
179 | } | |
180 | } | |
181 | } | |
182 | ||
183 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
184 | int rate, int erp, int short_preamble) | |
185 | { | |
186 | int dur; | |
187 | ||
188 | /* calculate duration (in microseconds, rounded up to next higher | |
189 | * integer if it includes a fractional microsecond) to send frame of | |
190 | * len bytes (does not include FCS) at the given rate. Duration will | |
191 | * also include SIFS. | |
192 | * | |
193 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
194 | * DIV_ROUND_UP() operations. | |
195 | */ | |
196 | ||
8318d78a | 197 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
198 | /* |
199 | * OFDM: | |
200 | * | |
201 | * N_DBPS = DATARATE x 4 | |
202 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
203 | * (16 = SIGNAL time, 6 = tail bits) | |
204 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
205 | * | |
206 | * T_SYM = 4 usec | |
207 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
208 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
209 | * signal ext = 6 usec | |
210 | */ | |
c2d1560a JB |
211 | dur = 16; /* SIFS + signal ext */ |
212 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
213 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
214 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
215 | 4 * rate); /* T_SYM x N_SYM */ | |
216 | } else { | |
217 | /* | |
218 | * 802.11b or 802.11g with 802.11b compatibility: | |
219 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
220 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
221 | * | |
222 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
223 | * aSIFSTime = 10 usec | |
224 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
225 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
226 | */ | |
227 | dur = 10; /* aSIFSTime = 10 usec */ | |
228 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
229 | ||
230 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
231 | } | |
232 | ||
233 | return dur; | |
234 | } | |
235 | ||
236 | /* Exported duration function for driver use */ | |
32bfd35d JB |
237 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
238 | struct ieee80211_vif *vif, | |
8318d78a JB |
239 | size_t frame_len, |
240 | struct ieee80211_rate *rate) | |
c2d1560a JB |
241 | { |
242 | struct ieee80211_local *local = hw_to_local(hw); | |
25d834e1 | 243 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
244 | u16 dur; |
245 | int erp; | |
25d834e1 | 246 | bool short_preamble = false; |
c2d1560a | 247 | |
8318d78a | 248 | erp = 0; |
25d834e1 JB |
249 | if (vif) { |
250 | sdata = vif_to_sdata(vif); | |
bda3933a | 251 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
252 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
253 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
254 | } | |
8318d78a JB |
255 | |
256 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
25d834e1 | 257 | short_preamble); |
c2d1560a JB |
258 | |
259 | return cpu_to_le16(dur); | |
260 | } | |
261 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
262 | ||
32bfd35d JB |
263 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
264 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 265 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
266 | { |
267 | struct ieee80211_local *local = hw_to_local(hw); | |
268 | struct ieee80211_rate *rate; | |
25d834e1 | 269 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 270 | bool short_preamble; |
c2d1560a JB |
271 | int erp; |
272 | u16 dur; | |
2e92e6f2 JB |
273 | struct ieee80211_supported_band *sband; |
274 | ||
275 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 276 | |
25d834e1 | 277 | short_preamble = false; |
7e9ed188 | 278 | |
e039fa4a | 279 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
280 | |
281 | erp = 0; | |
25d834e1 JB |
282 | if (vif) { |
283 | sdata = vif_to_sdata(vif); | |
bda3933a | 284 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
285 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
286 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
287 | } | |
c2d1560a JB |
288 | |
289 | /* CTS duration */ | |
8318d78a | 290 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
291 | erp, short_preamble); |
292 | /* Data frame duration */ | |
8318d78a | 293 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
294 | erp, short_preamble); |
295 | /* ACK duration */ | |
8318d78a | 296 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
297 | erp, short_preamble); |
298 | ||
299 | return cpu_to_le16(dur); | |
300 | } | |
301 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
302 | ||
32bfd35d JB |
303 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
304 | struct ieee80211_vif *vif, | |
c2d1560a | 305 | size_t frame_len, |
e039fa4a | 306 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
307 | { |
308 | struct ieee80211_local *local = hw_to_local(hw); | |
309 | struct ieee80211_rate *rate; | |
25d834e1 | 310 | struct ieee80211_sub_if_data *sdata; |
471b3efd | 311 | bool short_preamble; |
c2d1560a JB |
312 | int erp; |
313 | u16 dur; | |
2e92e6f2 JB |
314 | struct ieee80211_supported_band *sband; |
315 | ||
316 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 317 | |
25d834e1 | 318 | short_preamble = false; |
7e9ed188 | 319 | |
e039fa4a | 320 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a | 321 | erp = 0; |
25d834e1 JB |
322 | if (vif) { |
323 | sdata = vif_to_sdata(vif); | |
bda3933a | 324 | short_preamble = sdata->vif.bss_conf.use_short_preamble; |
25d834e1 JB |
325 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) |
326 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
327 | } | |
c2d1560a JB |
328 | |
329 | /* Data frame duration */ | |
8318d78a | 330 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 331 | erp, short_preamble); |
e039fa4a | 332 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 333 | /* ACK duration */ |
8318d78a | 334 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
335 | erp, short_preamble); |
336 | } | |
337 | ||
338 | return cpu_to_le16(dur); | |
339 | } | |
340 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
341 | ||
ce7c9111 KV |
342 | static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, |
343 | enum queue_stop_reason reason) | |
c2d1560a JB |
344 | { |
345 | struct ieee80211_local *local = hw_to_local(hw); | |
346 | ||
96f5e66e JB |
347 | if (queue >= hw->queues) { |
348 | if (local->ampdu_ac_queue[queue - hw->queues] < 0) | |
349 | return; | |
350 | ||
351 | /* | |
352 | * for virtual aggregation queues, we need to refcount the | |
353 | * internal mac80211 disable (multiple times!), keep track of | |
354 | * driver disable _and_ make sure the regular queue is | |
355 | * actually enabled. | |
356 | */ | |
357 | if (reason == IEEE80211_QUEUE_STOP_REASON_AGGREGATION) | |
358 | local->amdpu_ac_stop_refcnt[queue - hw->queues]--; | |
359 | else | |
360 | __clear_bit(reason, &local->queue_stop_reasons[queue]); | |
ce7c9111 | 361 | |
96f5e66e JB |
362 | if (local->queue_stop_reasons[queue] || |
363 | local->amdpu_ac_stop_refcnt[queue - hw->queues]) | |
ce7c9111 | 364 | return; |
96f5e66e JB |
365 | |
366 | /* now go on to treat the corresponding regular queue */ | |
367 | queue = local->ampdu_ac_queue[queue - hw->queues]; | |
368 | reason = IEEE80211_QUEUE_STOP_REASON_AGGREGATION; | |
ce7c9111 KV |
369 | } |
370 | ||
96f5e66e JB |
371 | __clear_bit(reason, &local->queue_stop_reasons[queue]); |
372 | ||
373 | if (local->queue_stop_reasons[queue] != 0) | |
374 | /* someone still has this queue stopped */ | |
375 | return; | |
376 | ||
e2530083 | 377 | if (test_bit(queue, local->queues_pending)) { |
f8e79ddd | 378 | set_bit(queue, local->queues_pending_run); |
e2530083 JB |
379 | tasklet_schedule(&local->tx_pending_tasklet); |
380 | } else { | |
51cb6db0 | 381 | netif_wake_subqueue(local->mdev, queue); |
c2d1560a JB |
382 | } |
383 | } | |
ce7c9111 | 384 | |
96f5e66e JB |
385 | void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, |
386 | enum queue_stop_reason reason) | |
ce7c9111 KV |
387 | { |
388 | struct ieee80211_local *local = hw_to_local(hw); | |
389 | unsigned long flags; | |
390 | ||
391 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
392 | __ieee80211_wake_queue(hw, queue, reason); | |
393 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
394 | } | |
395 | ||
396 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
397 | { | |
398 | ieee80211_wake_queue_by_reason(hw, queue, | |
399 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
400 | } | |
c2d1560a JB |
401 | EXPORT_SYMBOL(ieee80211_wake_queue); |
402 | ||
ce7c9111 KV |
403 | static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, |
404 | enum queue_stop_reason reason) | |
c2d1560a JB |
405 | { |
406 | struct ieee80211_local *local = hw_to_local(hw); | |
407 | ||
96f5e66e JB |
408 | if (queue >= hw->queues) { |
409 | if (local->ampdu_ac_queue[queue - hw->queues] < 0) | |
410 | return; | |
411 | ||
412 | /* | |
413 | * for virtual aggregation queues, we need to refcount the | |
414 | * internal mac80211 disable (multiple times!), keep track of | |
415 | * driver disable _and_ make sure the regular queue is | |
416 | * actually enabled. | |
417 | */ | |
418 | if (reason == IEEE80211_QUEUE_STOP_REASON_AGGREGATION) | |
419 | local->amdpu_ac_stop_refcnt[queue - hw->queues]++; | |
420 | else | |
421 | __set_bit(reason, &local->queue_stop_reasons[queue]); | |
422 | ||
423 | /* now go on to treat the corresponding regular queue */ | |
424 | queue = local->ampdu_ac_queue[queue - hw->queues]; | |
425 | reason = IEEE80211_QUEUE_STOP_REASON_AGGREGATION; | |
426 | } | |
427 | ||
428 | __set_bit(reason, &local->queue_stop_reasons[queue]); | |
ce7c9111 | 429 | |
51cb6db0 | 430 | netif_stop_subqueue(local->mdev, queue); |
c2d1560a | 431 | } |
ce7c9111 | 432 | |
96f5e66e JB |
433 | void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, |
434 | enum queue_stop_reason reason) | |
ce7c9111 KV |
435 | { |
436 | struct ieee80211_local *local = hw_to_local(hw); | |
437 | unsigned long flags; | |
438 | ||
439 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
440 | __ieee80211_stop_queue(hw, queue, reason); | |
441 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
442 | } | |
443 | ||
444 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
445 | { | |
446 | ieee80211_stop_queue_by_reason(hw, queue, | |
447 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
448 | } | |
c2d1560a JB |
449 | EXPORT_SYMBOL(ieee80211_stop_queue); |
450 | ||
ce7c9111 KV |
451 | void ieee80211_stop_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 | ||
96f5e66e | 460 | for (i = 0; i < hw->queues; i++) |
ce7c9111 KV |
461 | __ieee80211_stop_queue(hw, i, reason); |
462 | ||
463 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
464 | } | |
465 | ||
466 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
467 | { | |
468 | ieee80211_stop_queues_by_reason(hw, | |
469 | IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
470 | } |
471 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
472 | ||
92ab8535 TW |
473 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) |
474 | { | |
475 | struct ieee80211_local *local = hw_to_local(hw); | |
96f5e66e JB |
476 | unsigned long flags; |
477 | ||
478 | if (queue >= hw->queues) { | |
479 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
480 | queue = local->ampdu_ac_queue[queue - hw->queues]; | |
481 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
482 | if (queue < 0) | |
483 | return true; | |
484 | } | |
485 | ||
92ab8535 TW |
486 | return __netif_subqueue_stopped(local->mdev, queue); |
487 | } | |
488 | EXPORT_SYMBOL(ieee80211_queue_stopped); | |
489 | ||
ce7c9111 KV |
490 | void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, |
491 | enum queue_stop_reason reason) | |
c2d1560a | 492 | { |
ce7c9111 KV |
493 | struct ieee80211_local *local = hw_to_local(hw); |
494 | unsigned long flags; | |
c2d1560a JB |
495 | int i; |
496 | ||
ce7c9111 KV |
497 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
498 | ||
c4680470 | 499 | for (i = 0; i < hw->queues + hw->ampdu_queues; i++) |
ce7c9111 KV |
500 | __ieee80211_wake_queue(hw, i, reason); |
501 | ||
502 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
503 | } | |
504 | ||
505 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
506 | { | |
507 | ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER); | |
c2d1560a JB |
508 | } |
509 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 510 | |
32bfd35d JB |
511 | void ieee80211_iterate_active_interfaces( |
512 | struct ieee80211_hw *hw, | |
513 | void (*iterator)(void *data, u8 *mac, | |
514 | struct ieee80211_vif *vif), | |
515 | void *data) | |
dabeb344 JB |
516 | { |
517 | struct ieee80211_local *local = hw_to_local(hw); | |
518 | struct ieee80211_sub_if_data *sdata; | |
519 | ||
c771c9d8 | 520 | mutex_lock(&local->iflist_mtx); |
2f561feb ID |
521 | |
522 | list_for_each_entry(sdata, &local->interfaces, list) { | |
523 | switch (sdata->vif.type) { | |
05c914fe JB |
524 | case __NL80211_IFTYPE_AFTER_LAST: |
525 | case NL80211_IFTYPE_UNSPECIFIED: | |
526 | case NL80211_IFTYPE_MONITOR: | |
527 | case NL80211_IFTYPE_AP_VLAN: | |
2f561feb | 528 | continue; |
05c914fe JB |
529 | case NL80211_IFTYPE_AP: |
530 | case NL80211_IFTYPE_STATION: | |
531 | case NL80211_IFTYPE_ADHOC: | |
532 | case NL80211_IFTYPE_WDS: | |
533 | case NL80211_IFTYPE_MESH_POINT: | |
2f561feb ID |
534 | break; |
535 | } | |
2f561feb ID |
536 | if (netif_running(sdata->dev)) |
537 | iterator(data, sdata->dev->dev_addr, | |
538 | &sdata->vif); | |
539 | } | |
540 | ||
c771c9d8 | 541 | mutex_unlock(&local->iflist_mtx); |
2f561feb ID |
542 | } |
543 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
544 | ||
545 | void ieee80211_iterate_active_interfaces_atomic( | |
546 | struct ieee80211_hw *hw, | |
547 | void (*iterator)(void *data, u8 *mac, | |
548 | struct ieee80211_vif *vif), | |
549 | void *data) | |
550 | { | |
551 | struct ieee80211_local *local = hw_to_local(hw); | |
552 | struct ieee80211_sub_if_data *sdata; | |
553 | ||
e38bad47 | 554 | rcu_read_lock(); |
dabeb344 | 555 | |
e38bad47 | 556 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 557 | switch (sdata->vif.type) { |
05c914fe JB |
558 | case __NL80211_IFTYPE_AFTER_LAST: |
559 | case NL80211_IFTYPE_UNSPECIFIED: | |
560 | case NL80211_IFTYPE_MONITOR: | |
561 | case NL80211_IFTYPE_AP_VLAN: | |
dabeb344 | 562 | continue; |
05c914fe JB |
563 | case NL80211_IFTYPE_AP: |
564 | case NL80211_IFTYPE_STATION: | |
565 | case NL80211_IFTYPE_ADHOC: | |
566 | case NL80211_IFTYPE_WDS: | |
567 | case NL80211_IFTYPE_MESH_POINT: | |
dabeb344 JB |
568 | break; |
569 | } | |
dabeb344 JB |
570 | if (netif_running(sdata->dev)) |
571 | iterator(data, sdata->dev->dev_addr, | |
32bfd35d | 572 | &sdata->vif); |
dabeb344 | 573 | } |
e38bad47 JB |
574 | |
575 | rcu_read_unlock(); | |
dabeb344 | 576 | } |
2f561feb | 577 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |
37ffc8da JB |
578 | |
579 | void ieee802_11_parse_elems(u8 *start, size_t len, | |
580 | struct ieee802_11_elems *elems) | |
581 | { | |
582 | size_t left = len; | |
583 | u8 *pos = start; | |
584 | ||
585 | memset(elems, 0, sizeof(*elems)); | |
586 | elems->ie_start = start; | |
587 | elems->total_len = len; | |
588 | ||
589 | while (left >= 2) { | |
590 | u8 id, elen; | |
591 | ||
592 | id = *pos++; | |
593 | elen = *pos++; | |
594 | left -= 2; | |
595 | ||
596 | if (elen > left) | |
597 | return; | |
598 | ||
599 | switch (id) { | |
600 | case WLAN_EID_SSID: | |
601 | elems->ssid = pos; | |
602 | elems->ssid_len = elen; | |
603 | break; | |
604 | case WLAN_EID_SUPP_RATES: | |
605 | elems->supp_rates = pos; | |
606 | elems->supp_rates_len = elen; | |
607 | break; | |
608 | case WLAN_EID_FH_PARAMS: | |
609 | elems->fh_params = pos; | |
610 | elems->fh_params_len = elen; | |
611 | break; | |
612 | case WLAN_EID_DS_PARAMS: | |
613 | elems->ds_params = pos; | |
614 | elems->ds_params_len = elen; | |
615 | break; | |
616 | case WLAN_EID_CF_PARAMS: | |
617 | elems->cf_params = pos; | |
618 | elems->cf_params_len = elen; | |
619 | break; | |
620 | case WLAN_EID_TIM: | |
621 | elems->tim = pos; | |
622 | elems->tim_len = elen; | |
623 | break; | |
624 | case WLAN_EID_IBSS_PARAMS: | |
625 | elems->ibss_params = pos; | |
626 | elems->ibss_params_len = elen; | |
627 | break; | |
628 | case WLAN_EID_CHALLENGE: | |
629 | elems->challenge = pos; | |
630 | elems->challenge_len = elen; | |
631 | break; | |
632 | case WLAN_EID_WPA: | |
633 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
634 | pos[2] == 0xf2) { | |
635 | /* Microsoft OUI (00:50:F2) */ | |
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 | if (pos[4] == 0) { | |
642 | elems->wmm_info = pos; | |
643 | elems->wmm_info_len = elen; | |
644 | } else if (pos[4] == 1) { | |
645 | elems->wmm_param = pos; | |
646 | elems->wmm_param_len = elen; | |
647 | } | |
648 | } | |
649 | } | |
650 | break; | |
651 | case WLAN_EID_RSN: | |
652 | elems->rsn = pos; | |
653 | elems->rsn_len = elen; | |
654 | break; | |
655 | case WLAN_EID_ERP_INFO: | |
656 | elems->erp_info = pos; | |
657 | elems->erp_info_len = elen; | |
658 | break; | |
659 | case WLAN_EID_EXT_SUPP_RATES: | |
660 | elems->ext_supp_rates = pos; | |
661 | elems->ext_supp_rates_len = elen; | |
662 | break; | |
663 | case WLAN_EID_HT_CAPABILITY: | |
09914813 JB |
664 | if (elen >= sizeof(struct ieee80211_ht_cap)) |
665 | elems->ht_cap_elem = (void *)pos; | |
37ffc8da | 666 | break; |
d9fe60de JB |
667 | case WLAN_EID_HT_INFORMATION: |
668 | if (elen >= sizeof(struct ieee80211_ht_info)) | |
09914813 | 669 | elems->ht_info_elem = (void *)pos; |
37ffc8da JB |
670 | break; |
671 | case WLAN_EID_MESH_ID: | |
672 | elems->mesh_id = pos; | |
673 | elems->mesh_id_len = elen; | |
674 | break; | |
675 | case WLAN_EID_MESH_CONFIG: | |
676 | elems->mesh_config = pos; | |
677 | elems->mesh_config_len = elen; | |
678 | break; | |
679 | case WLAN_EID_PEER_LINK: | |
680 | elems->peer_link = pos; | |
681 | elems->peer_link_len = elen; | |
682 | break; | |
683 | case WLAN_EID_PREQ: | |
684 | elems->preq = pos; | |
685 | elems->preq_len = elen; | |
686 | break; | |
687 | case WLAN_EID_PREP: | |
688 | elems->prep = pos; | |
689 | elems->prep_len = elen; | |
690 | break; | |
691 | case WLAN_EID_PERR: | |
692 | elems->perr = pos; | |
693 | elems->perr_len = elen; | |
694 | break; | |
695 | case WLAN_EID_CHANNEL_SWITCH: | |
696 | elems->ch_switch_elem = pos; | |
697 | elems->ch_switch_elem_len = elen; | |
698 | break; | |
699 | case WLAN_EID_QUIET: | |
700 | if (!elems->quiet_elem) { | |
701 | elems->quiet_elem = pos; | |
702 | elems->quiet_elem_len = elen; | |
703 | } | |
704 | elems->num_of_quiet_elem++; | |
705 | break; | |
706 | case WLAN_EID_COUNTRY: | |
707 | elems->country_elem = pos; | |
708 | elems->country_elem_len = elen; | |
709 | break; | |
710 | case WLAN_EID_PWR_CONSTRAINT: | |
711 | elems->pwr_constr_elem = pos; | |
712 | elems->pwr_constr_elem_len = elen; | |
713 | break; | |
f797eb7e JM |
714 | case WLAN_EID_TIMEOUT_INTERVAL: |
715 | elems->timeout_int = pos; | |
716 | elems->timeout_int_len = elen; | |
63a5ab82 | 717 | break; |
37ffc8da JB |
718 | default: |
719 | break; | |
720 | } | |
721 | ||
722 | left -= elen; | |
723 | pos += elen; | |
724 | } | |
725 | } | |
5825fe10 JB |
726 | |
727 | void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata) | |
728 | { | |
729 | struct ieee80211_local *local = sdata->local; | |
730 | struct ieee80211_tx_queue_params qparam; | |
731 | int i; | |
732 | ||
733 | if (!local->ops->conf_tx) | |
734 | return; | |
735 | ||
736 | memset(&qparam, 0, sizeof(qparam)); | |
737 | ||
738 | qparam.aifs = 2; | |
739 | ||
740 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
741 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
742 | qparam.cw_min = 31; | |
743 | else | |
744 | qparam.cw_min = 15; | |
745 | ||
746 | qparam.cw_max = 1023; | |
747 | qparam.txop = 0; | |
748 | ||
749 | for (i = 0; i < local_to_hw(local)->queues; i++) | |
750 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
751 | } | |
e50db65c | 752 | |
46900298 JB |
753 | void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
754 | const size_t supp_rates_len, | |
755 | const u8 *supp_rates) | |
756 | { | |
757 | struct ieee80211_local *local = sdata->local; | |
758 | int i, have_higher_than_11mbit = 0; | |
759 | ||
760 | /* cf. IEEE 802.11 9.2.12 */ | |
761 | for (i = 0; i < supp_rates_len; i++) | |
762 | if ((supp_rates[i] & 0x7f) * 5 > 110) | |
763 | have_higher_than_11mbit = 1; | |
764 | ||
765 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
766 | have_higher_than_11mbit) | |
767 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
768 | else | |
769 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
770 | ||
771 | ieee80211_set_wmm_default(sdata); | |
772 | } | |
773 | ||
e50db65c JB |
774 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
775 | int encrypt) | |
776 | { | |
777 | skb->dev = sdata->local->mdev; | |
778 | skb_set_mac_header(skb, 0); | |
779 | skb_set_network_header(skb, 0); | |
780 | skb_set_transport_header(skb, 0); | |
781 | ||
782 | skb->iif = sdata->dev->ifindex; | |
783 | skb->do_not_encrypt = !encrypt; | |
784 | ||
785 | dev_queue_xmit(skb); | |
786 | } | |
e16751c3 JB |
787 | |
788 | int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) | |
789 | { | |
790 | int ret = -EINVAL; | |
791 | struct ieee80211_channel *chan; | |
792 | struct ieee80211_local *local = sdata->local; | |
793 | ||
794 | chan = ieee80211_get_channel(local->hw.wiphy, freqMHz); | |
795 | ||
796 | if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { | |
05c914fe | 797 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
d73782fd | 798 | chan->flags & IEEE80211_CHAN_NO_IBSS) |
e16751c3 | 799 | return ret; |
e16751c3 | 800 | local->oper_channel = chan; |
094d05dc | 801 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e16751c3 | 802 | |
c2b13452 | 803 | if (local->sw_scanning || local->hw_scanning) |
e16751c3 JB |
804 | ret = 0; |
805 | else | |
e8975581 JB |
806 | ret = ieee80211_hw_config( |
807 | local, IEEE80211_CONF_CHANGE_CHANNEL); | |
e16751c3 JB |
808 | } |
809 | ||
810 | return ret; | |
811 | } | |
96dd22ac | 812 | |
881d948c | 813 | u32 ieee80211_mandatory_rates(struct ieee80211_local *local, |
96dd22ac JB |
814 | enum ieee80211_band band) |
815 | { | |
816 | struct ieee80211_supported_band *sband; | |
817 | struct ieee80211_rate *bitrates; | |
881d948c | 818 | u32 mandatory_rates; |
96dd22ac JB |
819 | enum ieee80211_rate_flags mandatory_flag; |
820 | int i; | |
821 | ||
822 | sband = local->hw.wiphy->bands[band]; | |
823 | if (!sband) { | |
824 | WARN_ON(1); | |
825 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
826 | } | |
827 | ||
828 | if (band == IEEE80211_BAND_2GHZ) | |
829 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
830 | else | |
831 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
832 | ||
833 | bitrates = sband->bitrates; | |
834 | mandatory_rates = 0; | |
835 | for (i = 0; i < sband->n_bitrates; i++) | |
836 | if (bitrates[i].flags & mandatory_flag) | |
837 | mandatory_rates |= BIT(i); | |
838 | return mandatory_rates; | |
839 | } | |
46900298 JB |
840 | |
841 | void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, | |
842 | u16 transaction, u16 auth_alg, | |
843 | u8 *extra, size_t extra_len, | |
844 | const u8 *bssid, int encrypt) | |
845 | { | |
846 | struct ieee80211_local *local = sdata->local; | |
847 | struct sk_buff *skb; | |
848 | struct ieee80211_mgmt *mgmt; | |
849 | const u8 *ie_auth = NULL; | |
850 | int ie_auth_len = 0; | |
851 | ||
852 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { | |
853 | ie_auth_len = sdata->u.mgd.ie_auth_len; | |
854 | ie_auth = sdata->u.mgd.ie_auth; | |
855 | } | |
856 | ||
857 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
858 | sizeof(*mgmt) + 6 + extra_len + ie_auth_len); | |
859 | if (!skb) { | |
860 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
861 | "frame\n", sdata->dev->name); | |
862 | return; | |
863 | } | |
864 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
865 | ||
866 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
867 | memset(mgmt, 0, 24 + 6); | |
868 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
869 | IEEE80211_STYPE_AUTH); | |
870 | if (encrypt) | |
871 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
872 | memcpy(mgmt->da, bssid, ETH_ALEN); | |
873 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
874 | memcpy(mgmt->bssid, bssid, ETH_ALEN); | |
875 | mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); | |
876 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
877 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
878 | if (extra) | |
879 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
880 | if (ie_auth) | |
881 | memcpy(skb_put(skb, ie_auth_len), ie_auth, ie_auth_len); | |
882 | ||
883 | ieee80211_tx_skb(sdata, skb, encrypt); | |
884 | } | |
885 | ||
886 | void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, | |
70692ad2 JM |
887 | u8 *ssid, size_t ssid_len, |
888 | u8 *ie, size_t ie_len) | |
46900298 JB |
889 | { |
890 | struct ieee80211_local *local = sdata->local; | |
891 | struct ieee80211_supported_band *sband; | |
892 | struct sk_buff *skb; | |
893 | struct ieee80211_mgmt *mgmt; | |
894 | u8 *pos, *supp_rates, *esupp_rates = NULL, *extra_preq_ie = NULL; | |
895 | int i, extra_preq_ie_len = 0; | |
896 | ||
897 | switch (sdata->vif.type) { | |
898 | case NL80211_IFTYPE_STATION: | |
899 | extra_preq_ie_len = sdata->u.mgd.ie_probereq_len; | |
900 | extra_preq_ie = sdata->u.mgd.ie_probereq; | |
901 | break; | |
902 | default: | |
903 | break; | |
904 | } | |
905 | ||
906 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 + | |
70692ad2 | 907 | ie_len + extra_preq_ie_len); |
46900298 JB |
908 | if (!skb) { |
909 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
910 | "request\n", sdata->dev->name); | |
911 | return; | |
912 | } | |
913 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
914 | ||
915 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
916 | memset(mgmt, 0, 24); | |
917 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
918 | IEEE80211_STYPE_PROBE_REQ); | |
919 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
920 | if (dst) { | |
921 | memcpy(mgmt->da, dst, ETH_ALEN); | |
922 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
923 | } else { | |
924 | memset(mgmt->da, 0xff, ETH_ALEN); | |
925 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
926 | } | |
927 | pos = skb_put(skb, 2 + ssid_len); | |
928 | *pos++ = WLAN_EID_SSID; | |
929 | *pos++ = ssid_len; | |
930 | memcpy(pos, ssid, ssid_len); | |
931 | ||
932 | supp_rates = skb_put(skb, 2); | |
933 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
934 | supp_rates[1] = 0; | |
935 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
936 | ||
937 | for (i = 0; i < sband->n_bitrates; i++) { | |
938 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
939 | if (esupp_rates) { | |
940 | pos = skb_put(skb, 1); | |
941 | esupp_rates[1]++; | |
942 | } else if (supp_rates[1] == 8) { | |
943 | esupp_rates = skb_put(skb, 3); | |
944 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
945 | esupp_rates[1] = 1; | |
946 | pos = &esupp_rates[2]; | |
947 | } else { | |
948 | pos = skb_put(skb, 1); | |
949 | supp_rates[1]++; | |
950 | } | |
951 | *pos = rate->bitrate / 5; | |
952 | } | |
953 | ||
70692ad2 JM |
954 | if (ie) |
955 | memcpy(skb_put(skb, ie_len), ie, ie_len); | |
46900298 JB |
956 | if (extra_preq_ie) |
957 | memcpy(skb_put(skb, extra_preq_ie_len), extra_preq_ie, | |
958 | extra_preq_ie_len); | |
959 | ||
960 | ieee80211_tx_skb(sdata, skb, 0); | |
961 | } | |
962 | ||
963 | u32 ieee80211_sta_get_rates(struct ieee80211_local *local, | |
964 | struct ieee802_11_elems *elems, | |
965 | enum ieee80211_band band) | |
966 | { | |
967 | struct ieee80211_supported_band *sband; | |
968 | struct ieee80211_rate *bitrates; | |
969 | size_t num_rates; | |
970 | u32 supp_rates; | |
971 | int i, j; | |
972 | sband = local->hw.wiphy->bands[band]; | |
973 | ||
974 | if (!sband) { | |
975 | WARN_ON(1); | |
976 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
977 | } | |
978 | ||
979 | bitrates = sband->bitrates; | |
980 | num_rates = sband->n_bitrates; | |
981 | supp_rates = 0; | |
982 | for (i = 0; i < elems->supp_rates_len + | |
983 | elems->ext_supp_rates_len; i++) { | |
984 | u8 rate = 0; | |
985 | int own_rate; | |
986 | if (i < elems->supp_rates_len) | |
987 | rate = elems->supp_rates[i]; | |
988 | else if (elems->ext_supp_rates) | |
989 | rate = elems->ext_supp_rates | |
990 | [i - elems->supp_rates_len]; | |
991 | own_rate = 5 * (rate & 0x7f); | |
992 | for (j = 0; j < num_rates; j++) | |
993 | if (bitrates[j].bitrate == own_rate) | |
994 | supp_rates |= BIT(j); | |
995 | } | |
996 | return supp_rates; | |
997 | } |