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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 | ||
c2d1560a | 44 | |
71364716 RR |
45 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
46 | enum ieee80211_if_types type) | |
c2d1560a JB |
47 | { |
48 | u16 fc; | |
49 | ||
98f0b0a3 RR |
50 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
51 | if (len < 16) | |
c2d1560a JB |
52 | return NULL; |
53 | ||
54 | fc = le16_to_cpu(hdr->frame_control); | |
55 | ||
56 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
57 | case IEEE80211_FTYPE_DATA: | |
98f0b0a3 RR |
58 | if (len < 24) /* drop incorrect hdr len (data) */ |
59 | return NULL; | |
c2d1560a JB |
60 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
61 | case IEEE80211_FCTL_TODS: | |
62 | return hdr->addr1; | |
63 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
64 | return NULL; | |
65 | case IEEE80211_FCTL_FROMDS: | |
66 | return hdr->addr2; | |
67 | case 0: | |
68 | return hdr->addr3; | |
69 | } | |
70 | break; | |
71 | case IEEE80211_FTYPE_MGMT: | |
98f0b0a3 RR |
72 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
73 | return NULL; | |
c2d1560a JB |
74 | return hdr->addr3; |
75 | case IEEE80211_FTYPE_CTL: | |
76 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) | |
77 | return hdr->addr1; | |
71364716 RR |
78 | else if ((fc & IEEE80211_FCTL_STYPE) == |
79 | IEEE80211_STYPE_BACK_REQ) { | |
80 | switch (type) { | |
81 | case IEEE80211_IF_TYPE_STA: | |
82 | return hdr->addr2; | |
83 | case IEEE80211_IF_TYPE_AP: | |
84 | case IEEE80211_IF_TYPE_VLAN: | |
85 | return hdr->addr1; | |
86 | default: | |
87 | return NULL; | |
88 | } | |
89 | } | |
c2d1560a JB |
90 | else |
91 | return NULL; | |
92 | } | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | int ieee80211_get_hdrlen(u16 fc) | |
98 | { | |
99 | int hdrlen = 24; | |
100 | ||
101 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
102 | case IEEE80211_FTYPE_DATA: | |
103 | if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) | |
104 | hdrlen = 30; /* Addr4 */ | |
105 | /* | |
106 | * The QoS Control field is two bytes and its presence is | |
107 | * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to | |
108 | * hdrlen if that bit is set. | |
109 | * This works by masking out the bit and shifting it to | |
110 | * bit position 1 so the result has the value 0 or 2. | |
111 | */ | |
112 | hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) | |
113 | >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); | |
114 | break; | |
115 | case IEEE80211_FTYPE_CTL: | |
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 & 0xE0) == 0xC0) | |
126 | hdrlen = 10; | |
127 | else | |
128 | hdrlen = 16; | |
129 | break; | |
130 | } | |
131 | ||
132 | return hdrlen; | |
133 | } | |
134 | EXPORT_SYMBOL(ieee80211_get_hdrlen); | |
135 | ||
6693be71 HH |
136 | unsigned int ieee80211_hdrlen(__le16 fc) |
137 | { | |
138 | unsigned int hdrlen = 24; | |
139 | ||
140 | if (ieee80211_is_data(fc)) { | |
141 | if (ieee80211_has_a4(fc)) | |
142 | hdrlen = 30; | |
143 | if (ieee80211_is_data_qos(fc)) | |
144 | hdrlen += IEEE80211_QOS_CTL_LEN; | |
145 | goto out; | |
146 | } | |
147 | ||
148 | if (ieee80211_is_ctl(fc)) { | |
149 | /* | |
150 | * ACK and CTS are 10 bytes, all others 16. To see how | |
151 | * to get this condition consider | |
152 | * subtype mask: 0b0000000011110000 (0x00F0) | |
153 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
154 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
155 | * bits that matter: ^^^ (0x00E0) | |
156 | * value of those: 0b0000000011000000 (0x00C0) | |
157 | */ | |
158 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
159 | hdrlen = 10; | |
160 | else | |
161 | hdrlen = 16; | |
162 | } | |
163 | out: | |
164 | return hdrlen; | |
165 | } | |
166 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
167 | ||
c9c6950c | 168 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
c2d1560a | 169 | { |
c9c6950c HH |
170 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data; |
171 | unsigned int hdrlen; | |
c2d1560a JB |
172 | |
173 | if (unlikely(skb->len < 10)) | |
174 | return 0; | |
c9c6950c | 175 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
c2d1560a JB |
176 | if (unlikely(hdrlen > skb->len)) |
177 | return 0; | |
178 | return hdrlen; | |
179 | } | |
180 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
181 | ||
ee385855 LCC |
182 | int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
183 | { | |
184 | int ae = meshhdr->flags & IEEE80211S_FLAGS_AE; | |
185 | /* 7.1.3.5a.2 */ | |
186 | switch (ae) { | |
187 | case 0: | |
ef269254 | 188 | return 6; |
ee385855 | 189 | case 1: |
ef269254 | 190 | return 12; |
ee385855 | 191 | case 2: |
ef269254 | 192 | return 18; |
ee385855 | 193 | case 3: |
ef269254 | 194 | return 24; |
ee385855 | 195 | default: |
ef269254 | 196 | return 6; |
ee385855 LCC |
197 | } |
198 | } | |
ee385855 | 199 | |
5cf121c3 | 200 | void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) |
c2d1560a JB |
201 | { |
202 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
203 | ||
204 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
5cf121c3 | 205 | if (tx->extra_frag) { |
c2d1560a JB |
206 | struct ieee80211_hdr *fhdr; |
207 | int i; | |
5cf121c3 | 208 | for (i = 0; i < tx->num_extra_frag; i++) { |
c2d1560a | 209 | fhdr = (struct ieee80211_hdr *) |
5cf121c3 | 210 | tx->extra_frag[i]->data; |
c2d1560a JB |
211 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
212 | } | |
213 | } | |
214 | } | |
215 | ||
216 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
217 | int rate, int erp, int short_preamble) | |
218 | { | |
219 | int dur; | |
220 | ||
221 | /* calculate duration (in microseconds, rounded up to next higher | |
222 | * integer if it includes a fractional microsecond) to send frame of | |
223 | * len bytes (does not include FCS) at the given rate. Duration will | |
224 | * also include SIFS. | |
225 | * | |
226 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
227 | * DIV_ROUND_UP() operations. | |
228 | */ | |
229 | ||
8318d78a | 230 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) { |
c2d1560a JB |
231 | /* |
232 | * OFDM: | |
233 | * | |
234 | * N_DBPS = DATARATE x 4 | |
235 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
236 | * (16 = SIGNAL time, 6 = tail bits) | |
237 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
238 | * | |
239 | * T_SYM = 4 usec | |
240 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
241 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
242 | * signal ext = 6 usec | |
243 | */ | |
c2d1560a JB |
244 | dur = 16; /* SIFS + signal ext */ |
245 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
246 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
247 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
248 | 4 * rate); /* T_SYM x N_SYM */ | |
249 | } else { | |
250 | /* | |
251 | * 802.11b or 802.11g with 802.11b compatibility: | |
252 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
253 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
254 | * | |
255 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
256 | * aSIFSTime = 10 usec | |
257 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
258 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
259 | */ | |
260 | dur = 10; /* aSIFSTime = 10 usec */ | |
261 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
262 | ||
263 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
264 | } | |
265 | ||
266 | return dur; | |
267 | } | |
268 | ||
269 | /* Exported duration function for driver use */ | |
32bfd35d JB |
270 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
271 | struct ieee80211_vif *vif, | |
8318d78a JB |
272 | size_t frame_len, |
273 | struct ieee80211_rate *rate) | |
c2d1560a JB |
274 | { |
275 | struct ieee80211_local *local = hw_to_local(hw); | |
32bfd35d | 276 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
c2d1560a JB |
277 | u16 dur; |
278 | int erp; | |
279 | ||
8318d78a JB |
280 | erp = 0; |
281 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
282 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
283 | ||
284 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp, | |
471b3efd | 285 | sdata->bss_conf.use_short_preamble); |
c2d1560a JB |
286 | |
287 | return cpu_to_le16(dur); | |
288 | } | |
289 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
290 | ||
32bfd35d JB |
291 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
292 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 293 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
294 | { |
295 | struct ieee80211_local *local = hw_to_local(hw); | |
296 | struct ieee80211_rate *rate; | |
32bfd35d | 297 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
471b3efd | 298 | bool short_preamble; |
c2d1560a JB |
299 | int erp; |
300 | u16 dur; | |
2e92e6f2 JB |
301 | struct ieee80211_supported_band *sband; |
302 | ||
303 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 304 | |
471b3efd | 305 | short_preamble = sdata->bss_conf.use_short_preamble; |
7e9ed188 | 306 | |
e039fa4a | 307 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
308 | |
309 | erp = 0; | |
310 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
311 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
c2d1560a JB |
312 | |
313 | /* CTS duration */ | |
8318d78a | 314 | dur = ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
315 | erp, short_preamble); |
316 | /* Data frame duration */ | |
8318d78a | 317 | dur += ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a JB |
318 | erp, short_preamble); |
319 | /* ACK duration */ | |
8318d78a | 320 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
321 | erp, short_preamble); |
322 | ||
323 | return cpu_to_le16(dur); | |
324 | } | |
325 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
326 | ||
32bfd35d JB |
327 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
328 | struct ieee80211_vif *vif, | |
c2d1560a | 329 | size_t frame_len, |
e039fa4a | 330 | const struct ieee80211_tx_info *frame_txctl) |
c2d1560a JB |
331 | { |
332 | struct ieee80211_local *local = hw_to_local(hw); | |
333 | struct ieee80211_rate *rate; | |
32bfd35d | 334 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
471b3efd | 335 | bool short_preamble; |
c2d1560a JB |
336 | int erp; |
337 | u16 dur; | |
2e92e6f2 JB |
338 | struct ieee80211_supported_band *sband; |
339 | ||
340 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
c2d1560a | 341 | |
471b3efd | 342 | short_preamble = sdata->bss_conf.use_short_preamble; |
7e9ed188 | 343 | |
e039fa4a | 344 | rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; |
8318d78a JB |
345 | erp = 0; |
346 | if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
347 | erp = rate->flags & IEEE80211_RATE_ERP_G; | |
c2d1560a JB |
348 | |
349 | /* Data frame duration */ | |
8318d78a | 350 | dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, |
c2d1560a | 351 | erp, short_preamble); |
e039fa4a | 352 | if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { |
c2d1560a | 353 | /* ACK duration */ |
8318d78a | 354 | dur += ieee80211_frame_duration(local, 10, rate->bitrate, |
c2d1560a JB |
355 | erp, short_preamble); |
356 | } | |
357 | ||
358 | return cpu_to_le16(dur); | |
359 | } | |
360 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
361 | ||
c2d1560a JB |
362 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) |
363 | { | |
364 | struct ieee80211_local *local = hw_to_local(hw); | |
365 | ||
e2530083 JB |
366 | if (test_bit(queue, local->queues_pending)) { |
367 | tasklet_schedule(&local->tx_pending_tasklet); | |
368 | } else { | |
369 | if (ieee80211_is_multiqueue(local)) { | |
370 | netif_wake_subqueue(local->mdev, queue); | |
371 | } else { | |
372 | WARN_ON(queue != 0); | |
373 | netif_wake_queue(local->mdev); | |
374 | } | |
c2d1560a JB |
375 | } |
376 | } | |
377 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
378 | ||
379 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
380 | { | |
381 | struct ieee80211_local *local = hw_to_local(hw); | |
382 | ||
e2530083 JB |
383 | if (ieee80211_is_multiqueue(local)) { |
384 | netif_stop_subqueue(local->mdev, queue); | |
385 | } else { | |
386 | WARN_ON(queue != 0); | |
c2d1560a | 387 | netif_stop_queue(local->mdev); |
e2530083 | 388 | } |
c2d1560a JB |
389 | } |
390 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
391 | ||
c2d1560a JB |
392 | void ieee80211_stop_queues(struct ieee80211_hw *hw) |
393 | { | |
394 | int i; | |
395 | ||
e2530083 | 396 | for (i = 0; i < ieee80211_num_queues(hw); i++) |
c2d1560a JB |
397 | ieee80211_stop_queue(hw, i); |
398 | } | |
399 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
400 | ||
401 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
402 | { | |
403 | int i; | |
404 | ||
c4680470 | 405 | for (i = 0; i < hw->queues + hw->ampdu_queues; i++) |
c2d1560a JB |
406 | ieee80211_wake_queue(hw, i); |
407 | } | |
408 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 | 409 | |
32bfd35d JB |
410 | void ieee80211_iterate_active_interfaces( |
411 | struct ieee80211_hw *hw, | |
412 | void (*iterator)(void *data, u8 *mac, | |
413 | struct ieee80211_vif *vif), | |
414 | void *data) | |
dabeb344 JB |
415 | { |
416 | struct ieee80211_local *local = hw_to_local(hw); | |
417 | struct ieee80211_sub_if_data *sdata; | |
418 | ||
2f561feb ID |
419 | rtnl_lock(); |
420 | ||
421 | list_for_each_entry(sdata, &local->interfaces, list) { | |
422 | switch (sdata->vif.type) { | |
423 | case IEEE80211_IF_TYPE_INVALID: | |
424 | case IEEE80211_IF_TYPE_MNTR: | |
425 | case IEEE80211_IF_TYPE_VLAN: | |
426 | continue; | |
427 | case IEEE80211_IF_TYPE_AP: | |
428 | case IEEE80211_IF_TYPE_STA: | |
429 | case IEEE80211_IF_TYPE_IBSS: | |
430 | case IEEE80211_IF_TYPE_WDS: | |
431 | case IEEE80211_IF_TYPE_MESH_POINT: | |
432 | break; | |
433 | } | |
434 | if (sdata->dev == local->mdev) | |
435 | continue; | |
436 | if (netif_running(sdata->dev)) | |
437 | iterator(data, sdata->dev->dev_addr, | |
438 | &sdata->vif); | |
439 | } | |
440 | ||
441 | rtnl_unlock(); | |
442 | } | |
443 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); | |
444 | ||
445 | void ieee80211_iterate_active_interfaces_atomic( | |
446 | struct ieee80211_hw *hw, | |
447 | void (*iterator)(void *data, u8 *mac, | |
448 | struct ieee80211_vif *vif), | |
449 | void *data) | |
450 | { | |
451 | struct ieee80211_local *local = hw_to_local(hw); | |
452 | struct ieee80211_sub_if_data *sdata; | |
453 | ||
e38bad47 | 454 | rcu_read_lock(); |
dabeb344 | 455 | |
e38bad47 | 456 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 457 | switch (sdata->vif.type) { |
dabeb344 JB |
458 | case IEEE80211_IF_TYPE_INVALID: |
459 | case IEEE80211_IF_TYPE_MNTR: | |
460 | case IEEE80211_IF_TYPE_VLAN: | |
461 | continue; | |
462 | case IEEE80211_IF_TYPE_AP: | |
463 | case IEEE80211_IF_TYPE_STA: | |
464 | case IEEE80211_IF_TYPE_IBSS: | |
465 | case IEEE80211_IF_TYPE_WDS: | |
6032f934 | 466 | case IEEE80211_IF_TYPE_MESH_POINT: |
dabeb344 JB |
467 | break; |
468 | } | |
469 | if (sdata->dev == local->mdev) | |
470 | continue; | |
471 | if (netif_running(sdata->dev)) | |
472 | iterator(data, sdata->dev->dev_addr, | |
32bfd35d | 473 | &sdata->vif); |
dabeb344 | 474 | } |
e38bad47 JB |
475 | |
476 | rcu_read_unlock(); | |
dabeb344 | 477 | } |
2f561feb | 478 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); |