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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" | |
28 | #include "ieee80211_rate.h" | |
29 | #include "wme.h" | |
30 | ||
31 | /* privid for wiphys to determine whether they belong to us or not */ | |
32 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
33 | ||
34 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
35 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
36 | const unsigned char rfc1042_header[] = | |
37 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
38 | ||
39 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
40 | const unsigned char bridge_tunnel_header[] = | |
41 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
42 | ||
c2d1560a JB |
43 | |
44 | static int rate_list_match(const int *rate_list, int rate) | |
45 | { | |
46 | int i; | |
47 | ||
48 | if (!rate_list) | |
49 | return 0; | |
50 | ||
51 | for (i = 0; rate_list[i] >= 0; i++) | |
52 | if (rate_list[i] == rate) | |
53 | return 1; | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
58 | void ieee80211_prepare_rates(struct ieee80211_local *local, | |
59 | struct ieee80211_hw_mode *mode) | |
60 | { | |
61 | int i; | |
62 | ||
63 | for (i = 0; i < mode->num_rates; i++) { | |
64 | struct ieee80211_rate *rate = &mode->rates[i]; | |
65 | ||
66 | rate->flags &= ~(IEEE80211_RATE_SUPPORTED | | |
67 | IEEE80211_RATE_BASIC); | |
68 | ||
69 | if (local->supp_rates[mode->mode]) { | |
70 | if (!rate_list_match(local->supp_rates[mode->mode], | |
71 | rate->rate)) | |
72 | continue; | |
73 | } | |
74 | ||
75 | rate->flags |= IEEE80211_RATE_SUPPORTED; | |
76 | ||
77 | /* Use configured basic rate set if it is available. If not, | |
78 | * use defaults that are sane for most cases. */ | |
79 | if (local->basic_rates[mode->mode]) { | |
80 | if (rate_list_match(local->basic_rates[mode->mode], | |
81 | rate->rate)) | |
82 | rate->flags |= IEEE80211_RATE_BASIC; | |
83 | } else switch (mode->mode) { | |
84 | case MODE_IEEE80211A: | |
85 | if (rate->rate == 60 || rate->rate == 120 || | |
86 | rate->rate == 240) | |
87 | rate->flags |= IEEE80211_RATE_BASIC; | |
88 | break; | |
89 | case MODE_IEEE80211B: | |
90 | if (rate->rate == 10 || rate->rate == 20) | |
91 | rate->flags |= IEEE80211_RATE_BASIC; | |
92 | break; | |
c2d1560a JB |
93 | case MODE_IEEE80211G: |
94 | if (rate->rate == 10 || rate->rate == 20 || | |
95 | rate->rate == 55 || rate->rate == 110) | |
96 | rate->flags |= IEEE80211_RATE_BASIC; | |
97 | break; | |
693d454d JB |
98 | case NUM_IEEE80211_MODES: |
99 | /* not useful */ | |
100 | break; | |
c2d1560a JB |
101 | } |
102 | ||
103 | /* Set ERP and MANDATORY flags based on phymode */ | |
104 | switch (mode->mode) { | |
105 | case MODE_IEEE80211A: | |
106 | if (rate->rate == 60 || rate->rate == 120 || | |
107 | rate->rate == 240) | |
108 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
109 | break; | |
110 | case MODE_IEEE80211B: | |
111 | if (rate->rate == 10) | |
112 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
113 | break; | |
c2d1560a JB |
114 | case MODE_IEEE80211G: |
115 | if (rate->rate == 10 || rate->rate == 20 || | |
116 | rate->rate == 55 || rate->rate == 110 || | |
117 | rate->rate == 60 || rate->rate == 120 || | |
118 | rate->rate == 240) | |
119 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
120 | break; | |
693d454d JB |
121 | case NUM_IEEE80211_MODES: |
122 | /* not useful */ | |
123 | break; | |
c2d1560a JB |
124 | } |
125 | if (ieee80211_is_erp_rate(mode->mode, rate->rate)) | |
126 | rate->flags |= IEEE80211_RATE_ERP; | |
127 | } | |
128 | } | |
129 | ||
71364716 RR |
130 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, |
131 | enum ieee80211_if_types type) | |
c2d1560a JB |
132 | { |
133 | u16 fc; | |
134 | ||
98f0b0a3 RR |
135 | /* drop ACK/CTS frames and incorrect hdr len (ctrl) */ |
136 | if (len < 16) | |
c2d1560a JB |
137 | return NULL; |
138 | ||
139 | fc = le16_to_cpu(hdr->frame_control); | |
140 | ||
141 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
142 | case IEEE80211_FTYPE_DATA: | |
98f0b0a3 RR |
143 | if (len < 24) /* drop incorrect hdr len (data) */ |
144 | return NULL; | |
c2d1560a JB |
145 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
146 | case IEEE80211_FCTL_TODS: | |
147 | return hdr->addr1; | |
148 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
149 | return NULL; | |
150 | case IEEE80211_FCTL_FROMDS: | |
151 | return hdr->addr2; | |
152 | case 0: | |
153 | return hdr->addr3; | |
154 | } | |
155 | break; | |
156 | case IEEE80211_FTYPE_MGMT: | |
98f0b0a3 RR |
157 | if (len < 24) /* drop incorrect hdr len (mgmt) */ |
158 | return NULL; | |
c2d1560a JB |
159 | return hdr->addr3; |
160 | case IEEE80211_FTYPE_CTL: | |
161 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) | |
162 | return hdr->addr1; | |
71364716 RR |
163 | else if ((fc & IEEE80211_FCTL_STYPE) == |
164 | IEEE80211_STYPE_BACK_REQ) { | |
165 | switch (type) { | |
166 | case IEEE80211_IF_TYPE_STA: | |
167 | return hdr->addr2; | |
168 | case IEEE80211_IF_TYPE_AP: | |
169 | case IEEE80211_IF_TYPE_VLAN: | |
170 | return hdr->addr1; | |
171 | default: | |
172 | return NULL; | |
173 | } | |
174 | } | |
c2d1560a JB |
175 | else |
176 | return NULL; | |
177 | } | |
178 | ||
179 | return NULL; | |
180 | } | |
181 | ||
182 | int ieee80211_get_hdrlen(u16 fc) | |
183 | { | |
184 | int hdrlen = 24; | |
185 | ||
186 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
187 | case IEEE80211_FTYPE_DATA: | |
188 | if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) | |
189 | hdrlen = 30; /* Addr4 */ | |
190 | /* | |
191 | * The QoS Control field is two bytes and its presence is | |
192 | * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to | |
193 | * hdrlen if that bit is set. | |
194 | * This works by masking out the bit and shifting it to | |
195 | * bit position 1 so the result has the value 0 or 2. | |
196 | */ | |
197 | hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) | |
198 | >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); | |
199 | break; | |
200 | case IEEE80211_FTYPE_CTL: | |
201 | /* | |
202 | * ACK and CTS are 10 bytes, all others 16. To see how | |
203 | * to get this condition consider | |
204 | * subtype mask: 0b0000000011110000 (0x00F0) | |
205 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
206 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
207 | * bits that matter: ^^^ (0x00E0) | |
208 | * value of those: 0b0000000011000000 (0x00C0) | |
209 | */ | |
210 | if ((fc & 0xE0) == 0xC0) | |
211 | hdrlen = 10; | |
212 | else | |
213 | hdrlen = 16; | |
214 | break; | |
215 | } | |
216 | ||
217 | return hdrlen; | |
218 | } | |
219 | EXPORT_SYMBOL(ieee80211_get_hdrlen); | |
220 | ||
221 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
222 | { | |
223 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; | |
224 | int hdrlen; | |
225 | ||
226 | if (unlikely(skb->len < 10)) | |
227 | return 0; | |
228 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); | |
229 | if (unlikely(hdrlen > skb->len)) | |
230 | return 0; | |
231 | return hdrlen; | |
232 | } | |
233 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
234 | ||
c2d1560a JB |
235 | void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) |
236 | { | |
237 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
238 | ||
239 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
240 | if (tx->u.tx.extra_frag) { | |
241 | struct ieee80211_hdr *fhdr; | |
242 | int i; | |
243 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
244 | fhdr = (struct ieee80211_hdr *) | |
245 | tx->u.tx.extra_frag[i]->data; | |
246 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
247 | } | |
248 | } | |
249 | } | |
250 | ||
251 | int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
252 | int rate, int erp, int short_preamble) | |
253 | { | |
254 | int dur; | |
255 | ||
256 | /* calculate duration (in microseconds, rounded up to next higher | |
257 | * integer if it includes a fractional microsecond) to send frame of | |
258 | * len bytes (does not include FCS) at the given rate. Duration will | |
259 | * also include SIFS. | |
260 | * | |
261 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
262 | * DIV_ROUND_UP() operations. | |
263 | */ | |
264 | ||
b708e610 | 265 | if (local->hw.conf.phymode == MODE_IEEE80211A || erp) { |
c2d1560a JB |
266 | /* |
267 | * OFDM: | |
268 | * | |
269 | * N_DBPS = DATARATE x 4 | |
270 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
271 | * (16 = SIGNAL time, 6 = tail bits) | |
272 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
273 | * | |
274 | * T_SYM = 4 usec | |
275 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
276 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
277 | * signal ext = 6 usec | |
278 | */ | |
c2d1560a JB |
279 | dur = 16; /* SIFS + signal ext */ |
280 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
281 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
282 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
283 | 4 * rate); /* T_SYM x N_SYM */ | |
284 | } else { | |
285 | /* | |
286 | * 802.11b or 802.11g with 802.11b compatibility: | |
287 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
288 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
289 | * | |
290 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
291 | * aSIFSTime = 10 usec | |
292 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
293 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
294 | */ | |
295 | dur = 10; /* aSIFSTime = 10 usec */ | |
296 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
297 | ||
298 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
299 | } | |
300 | ||
301 | return dur; | |
302 | } | |
303 | ||
304 | /* Exported duration function for driver use */ | |
7e9ed188 | 305 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id, |
c2d1560a JB |
306 | size_t frame_len, int rate) |
307 | { | |
308 | struct ieee80211_local *local = hw_to_local(hw); | |
881d966b | 309 | struct net_device *bdev = dev_get_by_index(&init_net, if_id); |
7e9ed188 | 310 | struct ieee80211_sub_if_data *sdata; |
c2d1560a JB |
311 | u16 dur; |
312 | int erp; | |
313 | ||
7e9ed188 DD |
314 | if (unlikely(!bdev)) |
315 | return 0; | |
316 | ||
317 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
c2d1560a JB |
318 | erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); |
319 | dur = ieee80211_frame_duration(local, frame_len, rate, | |
13262ffd | 320 | erp, sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE); |
c2d1560a | 321 | |
7e9ed188 | 322 | dev_put(bdev); |
c2d1560a JB |
323 | return cpu_to_le16(dur); |
324 | } | |
325 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
326 | ||
7e9ed188 | 327 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id, |
c2d1560a JB |
328 | size_t frame_len, |
329 | const struct ieee80211_tx_control *frame_txctl) | |
330 | { | |
331 | struct ieee80211_local *local = hw_to_local(hw); | |
332 | struct ieee80211_rate *rate; | |
881d966b | 333 | struct net_device *bdev = dev_get_by_index(&init_net, if_id); |
7e9ed188 DD |
334 | struct ieee80211_sub_if_data *sdata; |
335 | int short_preamble; | |
c2d1560a JB |
336 | int erp; |
337 | u16 dur; | |
338 | ||
7e9ed188 DD |
339 | if (unlikely(!bdev)) |
340 | return 0; | |
341 | ||
342 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
13262ffd | 343 | short_preamble = sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE; |
7e9ed188 | 344 | |
c2d1560a JB |
345 | rate = frame_txctl->rts_rate; |
346 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
347 | ||
348 | /* CTS duration */ | |
349 | dur = ieee80211_frame_duration(local, 10, rate->rate, | |
350 | erp, short_preamble); | |
351 | /* Data frame duration */ | |
352 | dur += ieee80211_frame_duration(local, frame_len, rate->rate, | |
353 | erp, short_preamble); | |
354 | /* ACK duration */ | |
355 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
356 | erp, short_preamble); | |
357 | ||
7e9ed188 | 358 | dev_put(bdev); |
c2d1560a JB |
359 | return cpu_to_le16(dur); |
360 | } | |
361 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
362 | ||
7e9ed188 | 363 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id, |
c2d1560a JB |
364 | size_t frame_len, |
365 | const struct ieee80211_tx_control *frame_txctl) | |
366 | { | |
367 | struct ieee80211_local *local = hw_to_local(hw); | |
368 | struct ieee80211_rate *rate; | |
881d966b | 369 | struct net_device *bdev = dev_get_by_index(&init_net, if_id); |
7e9ed188 DD |
370 | struct ieee80211_sub_if_data *sdata; |
371 | int short_preamble; | |
c2d1560a JB |
372 | int erp; |
373 | u16 dur; | |
374 | ||
7e9ed188 DD |
375 | if (unlikely(!bdev)) |
376 | return 0; | |
377 | ||
378 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
13262ffd | 379 | short_preamble = sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE; |
7e9ed188 | 380 | |
c2d1560a JB |
381 | rate = frame_txctl->rts_rate; |
382 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
383 | ||
384 | /* Data frame duration */ | |
385 | dur = ieee80211_frame_duration(local, frame_len, rate->rate, | |
386 | erp, short_preamble); | |
387 | if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { | |
388 | /* ACK duration */ | |
389 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
390 | erp, short_preamble); | |
391 | } | |
392 | ||
7e9ed188 | 393 | dev_put(bdev); |
c2d1560a JB |
394 | return cpu_to_le16(dur); |
395 | } | |
396 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
397 | ||
398 | struct ieee80211_rate * | |
399 | ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) | |
400 | { | |
401 | struct ieee80211_hw_mode *mode; | |
402 | int r; | |
403 | ||
404 | list_for_each_entry(mode, &local->modes_list, list) { | |
405 | if (mode->mode != phymode) | |
406 | continue; | |
407 | for (r = 0; r < mode->num_rates; r++) { | |
408 | struct ieee80211_rate *rate = &mode->rates[r]; | |
409 | if (rate->val == hw_rate || | |
410 | (rate->flags & IEEE80211_RATE_PREAMBLE2 && | |
411 | rate->val2 == hw_rate)) | |
412 | return rate; | |
413 | } | |
414 | } | |
415 | ||
416 | return NULL; | |
417 | } | |
418 | ||
419 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
420 | { | |
421 | struct ieee80211_local *local = hw_to_local(hw); | |
422 | ||
423 | if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, | |
424 | &local->state[queue])) { | |
425 | if (test_bit(IEEE80211_LINK_STATE_PENDING, | |
426 | &local->state[queue])) | |
427 | tasklet_schedule(&local->tx_pending_tasklet); | |
428 | else | |
429 | if (!ieee80211_qdisc_installed(local->mdev)) { | |
430 | if (queue == 0) | |
431 | netif_wake_queue(local->mdev); | |
432 | } else | |
433 | __netif_schedule(local->mdev); | |
434 | } | |
435 | } | |
436 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
437 | ||
438 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
439 | { | |
440 | struct ieee80211_local *local = hw_to_local(hw); | |
441 | ||
442 | if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) | |
443 | netif_stop_queue(local->mdev); | |
444 | set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
445 | } | |
446 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
447 | ||
448 | void ieee80211_start_queues(struct ieee80211_hw *hw) | |
449 | { | |
450 | struct ieee80211_local *local = hw_to_local(hw); | |
451 | int i; | |
452 | ||
453 | for (i = 0; i < local->hw.queues; i++) | |
454 | clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); | |
455 | if (!ieee80211_qdisc_installed(local->mdev)) | |
456 | netif_start_queue(local->mdev); | |
457 | } | |
458 | EXPORT_SYMBOL(ieee80211_start_queues); | |
459 | ||
460 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
461 | { | |
462 | int i; | |
463 | ||
464 | for (i = 0; i < hw->queues; i++) | |
465 | ieee80211_stop_queue(hw, i); | |
466 | } | |
467 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
468 | ||
469 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
470 | { | |
471 | int i; | |
472 | ||
473 | for (i = 0; i < hw->queues; i++) | |
474 | ieee80211_wake_queue(hw, i); | |
475 | } | |
476 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
dabeb344 JB |
477 | |
478 | void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, | |
479 | void (*iterator)(void *data, u8 *mac, | |
480 | int if_id), | |
481 | void *data) | |
482 | { | |
483 | struct ieee80211_local *local = hw_to_local(hw); | |
484 | struct ieee80211_sub_if_data *sdata; | |
485 | ||
e38bad47 | 486 | rcu_read_lock(); |
dabeb344 | 487 | |
e38bad47 | 488 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
dabeb344 JB |
489 | switch (sdata->type) { |
490 | case IEEE80211_IF_TYPE_INVALID: | |
491 | case IEEE80211_IF_TYPE_MNTR: | |
492 | case IEEE80211_IF_TYPE_VLAN: | |
493 | continue; | |
494 | case IEEE80211_IF_TYPE_AP: | |
495 | case IEEE80211_IF_TYPE_STA: | |
496 | case IEEE80211_IF_TYPE_IBSS: | |
497 | case IEEE80211_IF_TYPE_WDS: | |
498 | break; | |
499 | } | |
500 | if (sdata->dev == local->mdev) | |
501 | continue; | |
502 | if (netif_running(sdata->dev)) | |
503 | iterator(data, sdata->dev->dev_addr, | |
504 | sdata->dev->ifindex); | |
505 | } | |
e38bad47 JB |
506 | |
507 | rcu_read_unlock(); | |
dabeb344 JB |
508 | } |
509 | EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); |