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10#include <linux/export.h>
11#include <linux/bitops.h>
12#include <linux/etherdevice.h>
13#include <linux/slab.h>
14#include <linux/ieee80211.h>
15#include <net/cfg80211.h>
16#include <net/ip.h>
17#include <net/dsfield.h>
18#include <linux/if_vlan.h>
19#include <linux/mpls.h>
20#include <linux/gcd.h>
21#include <linux/bitfield.h>
22#include <linux/nospec.h>
23#include "core.h"
24#include "rdev-ops.h"
25
26
27struct ieee80211_rate *
28ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
29 u32 basic_rates, int bitrate)
30{
31 struct ieee80211_rate *result = &sband->bitrates[0];
32 int i;
33
34 for (i = 0; i < sband->n_bitrates; i++) {
35 if (!(basic_rates & BIT(i)))
36 continue;
37 if (sband->bitrates[i].bitrate > bitrate)
38 continue;
39 result = &sband->bitrates[i];
40 }
41
42 return result;
43}
44EXPORT_SYMBOL(ieee80211_get_response_rate);
45
46u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
47 enum nl80211_bss_scan_width scan_width)
48{
49 struct ieee80211_rate *bitrates;
50 u32 mandatory_rates = 0;
51 enum ieee80211_rate_flags mandatory_flag;
52 int i;
53
54 if (WARN_ON(!sband))
55 return 1;
56
57 if (sband->band == NL80211_BAND_2GHZ) {
58 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
59 scan_width == NL80211_BSS_CHAN_WIDTH_10)
60 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
61 else
62 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
63 } else {
64 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
65 }
66
67 bitrates = sband->bitrates;
68 for (i = 0; i < sband->n_bitrates; i++)
69 if (bitrates[i].flags & mandatory_flag)
70 mandatory_rates |= BIT(i);
71 return mandatory_rates;
72}
73EXPORT_SYMBOL(ieee80211_mandatory_rates);
74
75u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band)
76{
77
78
79 if (chan <= 0)
80 return 0;
81 switch (band) {
82 case NL80211_BAND_2GHZ:
83 if (chan == 14)
84 return MHZ_TO_KHZ(2484);
85 else if (chan < 14)
86 return MHZ_TO_KHZ(2407 + chan * 5);
87 break;
88 case NL80211_BAND_5GHZ:
89 if (chan >= 182 && chan <= 196)
90 return MHZ_TO_KHZ(4000 + chan * 5);
91 else
92 return MHZ_TO_KHZ(5000 + chan * 5);
93 break;
94 case NL80211_BAND_6GHZ:
95
96 if (chan == 2)
97 return MHZ_TO_KHZ(5935);
98 if (chan <= 233)
99 return MHZ_TO_KHZ(5950 + chan * 5);
100 break;
101 case NL80211_BAND_60GHZ:
102 if (chan < 7)
103 return MHZ_TO_KHZ(56160 + chan * 2160);
104 break;
105 case NL80211_BAND_S1GHZ:
106 return 902000 + chan * 500;
107 default:
108 ;
109 }
110 return 0;
111}
112EXPORT_SYMBOL(ieee80211_channel_to_freq_khz);
113
114enum nl80211_chan_width
115ieee80211_s1g_channel_width(const struct ieee80211_channel *chan)
116{
117 if (WARN_ON(!chan || chan->band != NL80211_BAND_S1GHZ))
118 return NL80211_CHAN_WIDTH_20_NOHT;
119
120
121
122
123 if (chan->flags & IEEE80211_CHAN_1MHZ)
124 return NL80211_CHAN_WIDTH_1;
125 else if (chan->flags & IEEE80211_CHAN_2MHZ)
126 return NL80211_CHAN_WIDTH_2;
127 else if (chan->flags & IEEE80211_CHAN_4MHZ)
128 return NL80211_CHAN_WIDTH_4;
129 else if (chan->flags & IEEE80211_CHAN_8MHZ)
130 return NL80211_CHAN_WIDTH_8;
131 else if (chan->flags & IEEE80211_CHAN_16MHZ)
132 return NL80211_CHAN_WIDTH_16;
133
134 pr_err("unknown channel width for channel at %dKHz?\n",
135 ieee80211_channel_to_khz(chan));
136
137 return NL80211_CHAN_WIDTH_1;
138}
139EXPORT_SYMBOL(ieee80211_s1g_channel_width);
140
141int ieee80211_freq_khz_to_channel(u32 freq)
142{
143
144 freq = KHZ_TO_MHZ(freq);
145
146
147 if (freq == 2484)
148 return 14;
149 else if (freq < 2484)
150 return (freq - 2407) / 5;
151 else if (freq >= 4910 && freq <= 4980)
152 return (freq - 4000) / 5;
153 else if (freq < 5925)
154 return (freq - 5000) / 5;
155 else if (freq == 5935)
156 return 2;
157 else if (freq <= 45000)
158
159 return (freq - 5950) / 5;
160 else if (freq >= 58320 && freq <= 70200)
161 return (freq - 56160) / 2160;
162 else
163 return 0;
164}
165EXPORT_SYMBOL(ieee80211_freq_khz_to_channel);
166
167struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy,
168 u32 freq)
169{
170 enum nl80211_band band;
171 struct ieee80211_supported_band *sband;
172 int i;
173
174 for (band = 0; band < NUM_NL80211_BANDS; band++) {
175 sband = wiphy->bands[band];
176
177 if (!sband)
178 continue;
179
180 for (i = 0; i < sband->n_channels; i++) {
181 struct ieee80211_channel *chan = &sband->channels[i];
182
183 if (ieee80211_channel_to_khz(chan) == freq)
184 return chan;
185 }
186 }
187
188 return NULL;
189}
190EXPORT_SYMBOL(ieee80211_get_channel_khz);
191
192static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
193{
194 int i, want;
195
196 switch (sband->band) {
197 case NL80211_BAND_5GHZ:
198 case NL80211_BAND_6GHZ:
199 want = 3;
200 for (i = 0; i < sband->n_bitrates; i++) {
201 if (sband->bitrates[i].bitrate == 60 ||
202 sband->bitrates[i].bitrate == 120 ||
203 sband->bitrates[i].bitrate == 240) {
204 sband->bitrates[i].flags |=
205 IEEE80211_RATE_MANDATORY_A;
206 want--;
207 }
208 }
209 WARN_ON(want);
210 break;
211 case NL80211_BAND_2GHZ:
212 want = 7;
213 for (i = 0; i < sband->n_bitrates; i++) {
214 switch (sband->bitrates[i].bitrate) {
215 case 10:
216 case 20:
217 case 55:
218 case 110:
219 sband->bitrates[i].flags |=
220 IEEE80211_RATE_MANDATORY_B |
221 IEEE80211_RATE_MANDATORY_G;
222 want--;
223 break;
224 case 60:
225 case 120:
226 case 240:
227 sband->bitrates[i].flags |=
228 IEEE80211_RATE_MANDATORY_G;
229 want--;
230 fallthrough;
231 default:
232 sband->bitrates[i].flags |=
233 IEEE80211_RATE_ERP_G;
234 break;
235 }
236 }
237 WARN_ON(want != 0 && want != 3);
238 break;
239 case NL80211_BAND_60GHZ:
240
241 WARN_ON(!sband->ht_cap.ht_supported);
242 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
243 break;
244 case NL80211_BAND_S1GHZ:
245
246
247
248 WARN_ON((sband->s1g_cap.nss_mcs[0] & 0x3) == 0x3);
249 break;
250 case NUM_NL80211_BANDS:
251 default:
252 WARN_ON(1);
253 break;
254 }
255}
256
257void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
258{
259 enum nl80211_band band;
260
261 for (band = 0; band < NUM_NL80211_BANDS; band++)
262 if (wiphy->bands[band])
263 set_mandatory_flags_band(wiphy->bands[band]);
264}
265
266bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
267{
268 int i;
269 for (i = 0; i < wiphy->n_cipher_suites; i++)
270 if (cipher == wiphy->cipher_suites[i])
271 return true;
272 return false;
273}
274
275static bool
276cfg80211_igtk_cipher_supported(struct cfg80211_registered_device *rdev)
277{
278 struct wiphy *wiphy = &rdev->wiphy;
279 int i;
280
281 for (i = 0; i < wiphy->n_cipher_suites; i++) {
282 switch (wiphy->cipher_suites[i]) {
283 case WLAN_CIPHER_SUITE_AES_CMAC:
284 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
285 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
286 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
287 return true;
288 }
289 }
290
291 return false;
292}
293
294bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev,
295 int key_idx, bool pairwise)
296{
297 int max_key_idx;
298
299 if (pairwise)
300 max_key_idx = 3;
301 else if (wiphy_ext_feature_isset(&rdev->wiphy,
302 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
303 wiphy_ext_feature_isset(&rdev->wiphy,
304 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
305 max_key_idx = 7;
306 else if (cfg80211_igtk_cipher_supported(rdev))
307 max_key_idx = 5;
308 else
309 max_key_idx = 3;
310
311 if (key_idx < 0 || key_idx > max_key_idx)
312 return false;
313
314 return true;
315}
316
317int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
318 struct key_params *params, int key_idx,
319 bool pairwise, const u8 *mac_addr)
320{
321 if (!cfg80211_valid_key_idx(rdev, key_idx, pairwise))
322 return -EINVAL;
323
324 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
325 return -EINVAL;
326
327 if (pairwise && !mac_addr)
328 return -EINVAL;
329
330 switch (params->cipher) {
331 case WLAN_CIPHER_SUITE_TKIP:
332
333 if ((pairwise && key_idx) ||
334 params->mode != NL80211_KEY_RX_TX)
335 return -EINVAL;
336 break;
337 case WLAN_CIPHER_SUITE_CCMP:
338 case WLAN_CIPHER_SUITE_CCMP_256:
339 case WLAN_CIPHER_SUITE_GCMP:
340 case WLAN_CIPHER_SUITE_GCMP_256:
341
342
343
344
345
346
347
348 if ((params->mode == NL80211_KEY_NO_TX && !pairwise) ||
349 params->mode == NL80211_KEY_SET_TX)
350 return -EINVAL;
351 if (wiphy_ext_feature_isset(&rdev->wiphy,
352 NL80211_EXT_FEATURE_EXT_KEY_ID)) {
353 if (pairwise && (key_idx < 0 || key_idx > 1))
354 return -EINVAL;
355 } else if (pairwise && key_idx) {
356 return -EINVAL;
357 }
358 break;
359 case WLAN_CIPHER_SUITE_AES_CMAC:
360 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
361 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
362 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
363
364 if (pairwise)
365 return -EINVAL;
366 if (key_idx < 4)
367 return -EINVAL;
368 break;
369 case WLAN_CIPHER_SUITE_WEP40:
370 case WLAN_CIPHER_SUITE_WEP104:
371 if (key_idx > 3)
372 return -EINVAL;
373 break;
374 default:
375 break;
376 }
377
378 switch (params->cipher) {
379 case WLAN_CIPHER_SUITE_WEP40:
380 if (params->key_len != WLAN_KEY_LEN_WEP40)
381 return -EINVAL;
382 break;
383 case WLAN_CIPHER_SUITE_TKIP:
384 if (params->key_len != WLAN_KEY_LEN_TKIP)
385 return -EINVAL;
386 break;
387 case WLAN_CIPHER_SUITE_CCMP:
388 if (params->key_len != WLAN_KEY_LEN_CCMP)
389 return -EINVAL;
390 break;
391 case WLAN_CIPHER_SUITE_CCMP_256:
392 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
393 return -EINVAL;
394 break;
395 case WLAN_CIPHER_SUITE_GCMP:
396 if (params->key_len != WLAN_KEY_LEN_GCMP)
397 return -EINVAL;
398 break;
399 case WLAN_CIPHER_SUITE_GCMP_256:
400 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
401 return -EINVAL;
402 break;
403 case WLAN_CIPHER_SUITE_WEP104:
404 if (params->key_len != WLAN_KEY_LEN_WEP104)
405 return -EINVAL;
406 break;
407 case WLAN_CIPHER_SUITE_AES_CMAC:
408 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
409 return -EINVAL;
410 break;
411 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
412 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
413 return -EINVAL;
414 break;
415 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
416 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
417 return -EINVAL;
418 break;
419 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
420 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
421 return -EINVAL;
422 break;
423 default:
424
425
426
427
428
429
430
431 break;
432 }
433
434 if (params->seq) {
435 switch (params->cipher) {
436 case WLAN_CIPHER_SUITE_WEP40:
437 case WLAN_CIPHER_SUITE_WEP104:
438
439 return -EINVAL;
440 case WLAN_CIPHER_SUITE_TKIP:
441 case WLAN_CIPHER_SUITE_CCMP:
442 case WLAN_CIPHER_SUITE_CCMP_256:
443 case WLAN_CIPHER_SUITE_GCMP:
444 case WLAN_CIPHER_SUITE_GCMP_256:
445 case WLAN_CIPHER_SUITE_AES_CMAC:
446 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
447 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
448 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
449 if (params->seq_len != 6)
450 return -EINVAL;
451 break;
452 }
453 }
454
455 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
456 return -EINVAL;
457
458 return 0;
459}
460
461unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
462{
463 unsigned int hdrlen = 24;
464
465 if (ieee80211_is_ext(fc)) {
466 hdrlen = 4;
467 goto out;
468 }
469
470 if (ieee80211_is_data(fc)) {
471 if (ieee80211_has_a4(fc))
472 hdrlen = 30;
473 if (ieee80211_is_data_qos(fc)) {
474 hdrlen += IEEE80211_QOS_CTL_LEN;
475 if (ieee80211_has_order(fc))
476 hdrlen += IEEE80211_HT_CTL_LEN;
477 }
478 goto out;
479 }
480
481 if (ieee80211_is_mgmt(fc)) {
482 if (ieee80211_has_order(fc))
483 hdrlen += IEEE80211_HT_CTL_LEN;
484 goto out;
485 }
486
487 if (ieee80211_is_ctl(fc)) {
488
489
490
491
492
493
494
495
496
497 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
498 hdrlen = 10;
499 else
500 hdrlen = 16;
501 }
502out:
503 return hdrlen;
504}
505EXPORT_SYMBOL(ieee80211_hdrlen);
506
507unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
508{
509 const struct ieee80211_hdr *hdr =
510 (const struct ieee80211_hdr *)skb->data;
511 unsigned int hdrlen;
512
513 if (unlikely(skb->len < 10))
514 return 0;
515 hdrlen = ieee80211_hdrlen(hdr->frame_control);
516 if (unlikely(hdrlen > skb->len))
517 return 0;
518 return hdrlen;
519}
520EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
521
522static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
523{
524 int ae = flags & MESH_FLAGS_AE;
525
526 switch (ae) {
527 default:
528 case 0:
529 return 6;
530 case MESH_FLAGS_AE_A4:
531 return 12;
532 case MESH_FLAGS_AE_A5_A6:
533 return 18;
534 }
535}
536
537unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
538{
539 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
540}
541EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
542
543int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
544 const u8 *addr, enum nl80211_iftype iftype,
545 u8 data_offset)
546{
547 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
548 struct {
549 u8 hdr[ETH_ALEN] __aligned(2);
550 __be16 proto;
551 } payload;
552 struct ethhdr tmp;
553 u16 hdrlen;
554 u8 mesh_flags = 0;
555
556 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
557 return -1;
558
559 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
560 if (skb->len < hdrlen + 8)
561 return -1;
562
563
564
565
566
567
568
569
570
571
572 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
573 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
574
575 if (iftype == NL80211_IFTYPE_MESH_POINT)
576 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
577
578 mesh_flags &= MESH_FLAGS_AE;
579
580 switch (hdr->frame_control &
581 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
582 case cpu_to_le16(IEEE80211_FCTL_TODS):
583 if (unlikely(iftype != NL80211_IFTYPE_AP &&
584 iftype != NL80211_IFTYPE_AP_VLAN &&
585 iftype != NL80211_IFTYPE_P2P_GO))
586 return -1;
587 break;
588 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
589 if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT &&
590 iftype != NL80211_IFTYPE_AP_VLAN &&
591 iftype != NL80211_IFTYPE_STATION))
592 return -1;
593 if (iftype == NL80211_IFTYPE_MESH_POINT) {
594 if (mesh_flags == MESH_FLAGS_AE_A4)
595 return -1;
596 if (mesh_flags == MESH_FLAGS_AE_A5_A6) {
597 skb_copy_bits(skb, hdrlen +
598 offsetof(struct ieee80211s_hdr, eaddr1),
599 tmp.h_dest, 2 * ETH_ALEN);
600 }
601 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
602 }
603 break;
604 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
605 if ((iftype != NL80211_IFTYPE_STATION &&
606 iftype != NL80211_IFTYPE_P2P_CLIENT &&
607 iftype != NL80211_IFTYPE_MESH_POINT) ||
608 (is_multicast_ether_addr(tmp.h_dest) &&
609 ether_addr_equal(tmp.h_source, addr)))
610 return -1;
611 if (iftype == NL80211_IFTYPE_MESH_POINT) {
612 if (mesh_flags == MESH_FLAGS_AE_A5_A6)
613 return -1;
614 if (mesh_flags == MESH_FLAGS_AE_A4)
615 skb_copy_bits(skb, hdrlen +
616 offsetof(struct ieee80211s_hdr, eaddr1),
617 tmp.h_source, ETH_ALEN);
618 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
619 }
620 break;
621 case cpu_to_le16(0):
622 if (iftype != NL80211_IFTYPE_ADHOC &&
623 iftype != NL80211_IFTYPE_STATION &&
624 iftype != NL80211_IFTYPE_OCB)
625 return -1;
626 break;
627 }
628
629 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
630 tmp.h_proto = payload.proto;
631
632 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
633 tmp.h_proto != htons(ETH_P_AARP) &&
634 tmp.h_proto != htons(ETH_P_IPX)) ||
635 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
636
637
638 hdrlen += ETH_ALEN + 2;
639 else
640 tmp.h_proto = htons(skb->len - hdrlen);
641
642 pskb_pull(skb, hdrlen);
643
644 if (!ehdr)
645 ehdr = skb_push(skb, sizeof(struct ethhdr));
646 memcpy(ehdr, &tmp, sizeof(tmp));
647
648 return 0;
649}
650EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
651
652static void
653__frame_add_frag(struct sk_buff *skb, struct page *page,
654 void *ptr, int len, int size)
655{
656 struct skb_shared_info *sh = skb_shinfo(skb);
657 int page_offset;
658
659 get_page(page);
660 page_offset = ptr - page_address(page);
661 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
662}
663
664static void
665__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
666 int offset, int len)
667{
668 struct skb_shared_info *sh = skb_shinfo(skb);
669 const skb_frag_t *frag = &sh->frags[0];
670 struct page *frag_page;
671 void *frag_ptr;
672 int frag_len, frag_size;
673 int head_size = skb->len - skb->data_len;
674 int cur_len;
675
676 frag_page = virt_to_head_page(skb->head);
677 frag_ptr = skb->data;
678 frag_size = head_size;
679
680 while (offset >= frag_size) {
681 offset -= frag_size;
682 frag_page = skb_frag_page(frag);
683 frag_ptr = skb_frag_address(frag);
684 frag_size = skb_frag_size(frag);
685 frag++;
686 }
687
688 frag_ptr += offset;
689 frag_len = frag_size - offset;
690
691 cur_len = min(len, frag_len);
692
693 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
694 len -= cur_len;
695
696 while (len > 0) {
697 frag_len = skb_frag_size(frag);
698 cur_len = min(len, frag_len);
699 __frame_add_frag(frame, skb_frag_page(frag),
700 skb_frag_address(frag), cur_len, frag_len);
701 len -= cur_len;
702 frag++;
703 }
704}
705
706static struct sk_buff *
707__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
708 int offset, int len, bool reuse_frag)
709{
710 struct sk_buff *frame;
711 int cur_len = len;
712
713 if (skb->len - offset < len)
714 return NULL;
715
716
717
718
719
720
721 if (reuse_frag)
722 cur_len = min_t(int, len, 32);
723
724
725
726
727
728 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
729 if (!frame)
730 return NULL;
731
732 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
733 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
734
735 len -= cur_len;
736 if (!len)
737 return frame;
738
739 offset += cur_len;
740 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
741
742 return frame;
743}
744
745void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
746 const u8 *addr, enum nl80211_iftype iftype,
747 const unsigned int extra_headroom,
748 const u8 *check_da, const u8 *check_sa)
749{
750 unsigned int hlen = ALIGN(extra_headroom, 4);
751 struct sk_buff *frame = NULL;
752 u16 ethertype;
753 u8 *payload;
754 int offset = 0, remaining;
755 struct ethhdr eth;
756 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
757 bool reuse_skb = false;
758 bool last = false;
759
760 while (!last) {
761 unsigned int subframe_len;
762 int len;
763 u8 padding;
764
765 skb_copy_bits(skb, offset, ð, sizeof(eth));
766 len = ntohs(eth.h_proto);
767 subframe_len = sizeof(struct ethhdr) + len;
768 padding = (4 - subframe_len) & 0x3;
769
770
771 remaining = skb->len - offset;
772 if (subframe_len > remaining)
773 goto purge;
774
775 offset += sizeof(struct ethhdr);
776 last = remaining <= subframe_len + padding;
777
778
779 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
780 !ether_addr_equal(check_da, eth.h_dest)) ||
781 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
782 offset += len + padding;
783 continue;
784 }
785
786
787 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
788 skb_pull(skb, offset);
789 frame = skb;
790 reuse_skb = true;
791 } else {
792 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
793 reuse_frag);
794 if (!frame)
795 goto purge;
796
797 offset += len + padding;
798 }
799
800 skb_reset_network_header(frame);
801 frame->dev = skb->dev;
802 frame->priority = skb->priority;
803
804 payload = frame->data;
805 ethertype = (payload[6] << 8) | payload[7];
806 if (likely((ether_addr_equal(payload, rfc1042_header) &&
807 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
808 ether_addr_equal(payload, bridge_tunnel_header))) {
809 eth.h_proto = htons(ethertype);
810 skb_pull(frame, ETH_ALEN + 2);
811 }
812
813 memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth));
814 __skb_queue_tail(list, frame);
815 }
816
817 if (!reuse_skb)
818 dev_kfree_skb(skb);
819
820 return;
821
822 purge:
823 __skb_queue_purge(list);
824 dev_kfree_skb(skb);
825}
826EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
827
828
829unsigned int cfg80211_classify8021d(struct sk_buff *skb,
830 struct cfg80211_qos_map *qos_map)
831{
832 unsigned int dscp;
833 unsigned char vlan_priority;
834 unsigned int ret;
835
836
837
838
839
840
841 if (skb->priority >= 256 && skb->priority <= 263) {
842 ret = skb->priority - 256;
843 goto out;
844 }
845
846 if (skb_vlan_tag_present(skb)) {
847 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
848 >> VLAN_PRIO_SHIFT;
849 if (vlan_priority > 0) {
850 ret = vlan_priority;
851 goto out;
852 }
853 }
854
855 switch (skb->protocol) {
856 case htons(ETH_P_IP):
857 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
858 break;
859 case htons(ETH_P_IPV6):
860 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
861 break;
862 case htons(ETH_P_MPLS_UC):
863 case htons(ETH_P_MPLS_MC): {
864 struct mpls_label mpls_tmp, *mpls;
865
866 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
867 sizeof(*mpls), &mpls_tmp);
868 if (!mpls)
869 return 0;
870
871 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
872 >> MPLS_LS_TC_SHIFT;
873 goto out;
874 }
875 case htons(ETH_P_80221):
876
877 return 7;
878 default:
879 return 0;
880 }
881
882 if (qos_map) {
883 unsigned int i, tmp_dscp = dscp >> 2;
884
885 for (i = 0; i < qos_map->num_des; i++) {
886 if (tmp_dscp == qos_map->dscp_exception[i].dscp) {
887 ret = qos_map->dscp_exception[i].up;
888 goto out;
889 }
890 }
891
892 for (i = 0; i < 8; i++) {
893 if (tmp_dscp >= qos_map->up[i].low &&
894 tmp_dscp <= qos_map->up[i].high) {
895 ret = i;
896 goto out;
897 }
898 }
899 }
900
901 ret = dscp >> 5;
902out:
903 return array_index_nospec(ret, IEEE80211_NUM_TIDS);
904}
905EXPORT_SYMBOL(cfg80211_classify8021d);
906
907const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id)
908{
909 const struct cfg80211_bss_ies *ies;
910
911 ies = rcu_dereference(bss->ies);
912 if (!ies)
913 return NULL;
914
915 return cfg80211_find_elem(id, ies->data, ies->len);
916}
917EXPORT_SYMBOL(ieee80211_bss_get_elem);
918
919void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
920{
921 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
922 struct net_device *dev = wdev->netdev;
923 int i;
924
925 if (!wdev->connect_keys)
926 return;
927
928 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
929 if (!wdev->connect_keys->params[i].cipher)
930 continue;
931 if (rdev_add_key(rdev, dev, i, false, NULL,
932 &wdev->connect_keys->params[i])) {
933 netdev_err(dev, "failed to set key %d\n", i);
934 continue;
935 }
936 if (wdev->connect_keys->def == i &&
937 rdev_set_default_key(rdev, dev, i, true, true)) {
938 netdev_err(dev, "failed to set defkey %d\n", i);
939 continue;
940 }
941 }
942
943 kfree_sensitive(wdev->connect_keys);
944 wdev->connect_keys = NULL;
945}
946
947void cfg80211_process_wdev_events(struct wireless_dev *wdev)
948{
949 struct cfg80211_event *ev;
950 unsigned long flags;
951
952 spin_lock_irqsave(&wdev->event_lock, flags);
953 while (!list_empty(&wdev->event_list)) {
954 ev = list_first_entry(&wdev->event_list,
955 struct cfg80211_event, list);
956 list_del(&ev->list);
957 spin_unlock_irqrestore(&wdev->event_lock, flags);
958
959 wdev_lock(wdev);
960 switch (ev->type) {
961 case EVENT_CONNECT_RESULT:
962 __cfg80211_connect_result(
963 wdev->netdev,
964 &ev->cr,
965 ev->cr.status == WLAN_STATUS_SUCCESS);
966 break;
967 case EVENT_ROAMED:
968 __cfg80211_roamed(wdev, &ev->rm);
969 break;
970 case EVENT_DISCONNECTED:
971 __cfg80211_disconnected(wdev->netdev,
972 ev->dc.ie, ev->dc.ie_len,
973 ev->dc.reason,
974 !ev->dc.locally_generated);
975 break;
976 case EVENT_IBSS_JOINED:
977 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
978 ev->ij.channel);
979 break;
980 case EVENT_STOPPED:
981 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
982 break;
983 case EVENT_PORT_AUTHORIZED:
984 __cfg80211_port_authorized(wdev, ev->pa.bssid);
985 break;
986 }
987 wdev_unlock(wdev);
988
989 kfree(ev);
990
991 spin_lock_irqsave(&wdev->event_lock, flags);
992 }
993 spin_unlock_irqrestore(&wdev->event_lock, flags);
994}
995
996void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
997{
998 struct wireless_dev *wdev;
999
1000 lockdep_assert_held(&rdev->wiphy.mtx);
1001
1002 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
1003 cfg80211_process_wdev_events(wdev);
1004}
1005
1006int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
1007 struct net_device *dev, enum nl80211_iftype ntype,
1008 struct vif_params *params)
1009{
1010 int err;
1011 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
1012
1013 lockdep_assert_held(&rdev->wiphy.mtx);
1014
1015
1016 if (otype == NL80211_IFTYPE_AP_VLAN)
1017 return -EOPNOTSUPP;
1018
1019
1020 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
1021 ntype == NL80211_IFTYPE_NAN)
1022 return -EOPNOTSUPP;
1023
1024 if (!rdev->ops->change_virtual_intf ||
1025 !(rdev->wiphy.interface_modes & (1 << ntype)))
1026 return -EOPNOTSUPP;
1027
1028
1029 if (netif_is_bridge_port(dev) &&
1030 (ntype == NL80211_IFTYPE_ADHOC ||
1031 ntype == NL80211_IFTYPE_STATION ||
1032 ntype == NL80211_IFTYPE_P2P_CLIENT))
1033 return -EBUSY;
1034
1035 if (ntype != otype) {
1036 dev->ieee80211_ptr->use_4addr = false;
1037 dev->ieee80211_ptr->mesh_id_up_len = 0;
1038 wdev_lock(dev->ieee80211_ptr);
1039 rdev_set_qos_map(rdev, dev, NULL);
1040 wdev_unlock(dev->ieee80211_ptr);
1041
1042 switch (otype) {
1043 case NL80211_IFTYPE_AP:
1044 cfg80211_stop_ap(rdev, dev, true);
1045 break;
1046 case NL80211_IFTYPE_ADHOC:
1047 cfg80211_leave_ibss(rdev, dev, false);
1048 break;
1049 case NL80211_IFTYPE_STATION:
1050 case NL80211_IFTYPE_P2P_CLIENT:
1051 wdev_lock(dev->ieee80211_ptr);
1052 cfg80211_disconnect(rdev, dev,
1053 WLAN_REASON_DEAUTH_LEAVING, true);
1054 wdev_unlock(dev->ieee80211_ptr);
1055 break;
1056 case NL80211_IFTYPE_MESH_POINT:
1057
1058 break;
1059 default:
1060 break;
1061 }
1062
1063 cfg80211_process_rdev_events(rdev);
1064 cfg80211_mlme_purge_registrations(dev->ieee80211_ptr);
1065 }
1066
1067 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
1068
1069 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1070
1071 if (!err && params && params->use_4addr != -1)
1072 dev->ieee80211_ptr->use_4addr = params->use_4addr;
1073
1074 if (!err) {
1075 dev->priv_flags &= ~IFF_DONT_BRIDGE;
1076 switch (ntype) {
1077 case NL80211_IFTYPE_STATION:
1078 if (dev->ieee80211_ptr->use_4addr)
1079 break;
1080 fallthrough;
1081 case NL80211_IFTYPE_OCB:
1082 case NL80211_IFTYPE_P2P_CLIENT:
1083 case NL80211_IFTYPE_ADHOC:
1084 dev->priv_flags |= IFF_DONT_BRIDGE;
1085 break;
1086 case NL80211_IFTYPE_P2P_GO:
1087 case NL80211_IFTYPE_AP:
1088 case NL80211_IFTYPE_AP_VLAN:
1089 case NL80211_IFTYPE_MESH_POINT:
1090
1091 break;
1092 case NL80211_IFTYPE_MONITOR:
1093
1094 break;
1095 case NL80211_IFTYPE_UNSPECIFIED:
1096 case NUM_NL80211_IFTYPES:
1097
1098 break;
1099 case NL80211_IFTYPE_P2P_DEVICE:
1100 case NL80211_IFTYPE_WDS:
1101 case NL80211_IFTYPE_NAN:
1102 WARN_ON(1);
1103 break;
1104 }
1105 }
1106
1107 if (!err && ntype != otype && netif_running(dev)) {
1108 cfg80211_update_iface_num(rdev, ntype, 1);
1109 cfg80211_update_iface_num(rdev, otype, -1);
1110 }
1111
1112 return err;
1113}
1114
1115static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
1116{
1117 int modulation, streams, bitrate;
1118
1119
1120 if (WARN_ON_ONCE(rate->mcs >= 32))
1121 return 0;
1122
1123 modulation = rate->mcs & 7;
1124 streams = (rate->mcs >> 3) + 1;
1125
1126 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1127
1128 if (modulation < 4)
1129 bitrate *= (modulation + 1);
1130 else if (modulation == 4)
1131 bitrate *= (modulation + 2);
1132 else
1133 bitrate *= (modulation + 3);
1134
1135 bitrate *= streams;
1136
1137 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1138 bitrate = (bitrate / 9) * 10;
1139
1140
1141 return (bitrate + 50000) / 100000;
1142}
1143
1144static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate)
1145{
1146 static const u32 __mcs2bitrate[] = {
1147
1148 [0] = 275,
1149
1150 [1] = 3850,
1151 [2] = 7700,
1152 [3] = 9625,
1153 [4] = 11550,
1154 [5] = 12512,
1155 [6] = 15400,
1156 [7] = 19250,
1157 [8] = 23100,
1158 [9] = 25025,
1159 [10] = 30800,
1160 [11] = 38500,
1161 [12] = 46200,
1162
1163 [13] = 6930,
1164 [14] = 8662,
1165 [15] = 13860,
1166 [16] = 17325,
1167 [17] = 20790,
1168 [18] = 27720,
1169 [19] = 34650,
1170 [20] = 41580,
1171 [21] = 45045,
1172 [22] = 51975,
1173 [23] = 62370,
1174 [24] = 67568,
1175
1176 [25] = 6260,
1177 [26] = 8340,
1178 [27] = 11120,
1179 [28] = 12510,
1180 [29] = 16680,
1181 [30] = 22240,
1182 [31] = 25030,
1183 };
1184
1185 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1186 return 0;
1187
1188 return __mcs2bitrate[rate->mcs];
1189}
1190
1191static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate)
1192{
1193 static const u32 __mcs2bitrate[] = {
1194 [6 - 6] = 26950,
1195 [7 - 6] = 50050,
1196 [8 - 6] = 53900,
1197 [9 - 6] = 57750,
1198 [10 - 6] = 63900,
1199 [11 - 6] = 75075,
1200 [12 - 6] = 80850,
1201 };
1202
1203
1204 if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12))
1205 return 0;
1206
1207 return __mcs2bitrate[rate->mcs - 6];
1208}
1209
1210static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate)
1211{
1212 static const u32 __mcs2bitrate[] = {
1213
1214 [0] = 275,
1215
1216 [1] = 3850,
1217 [2] = 7700,
1218 [3] = 9625,
1219 [4] = 11550,
1220 [5] = 12512,
1221 [6] = 13475,
1222 [7] = 15400,
1223 [8] = 19250,
1224 [9] = 23100,
1225 [10] = 25025,
1226 [11] = 26950,
1227 [12] = 30800,
1228 [13] = 38500,
1229 [14] = 46200,
1230 [15] = 50050,
1231 [16] = 53900,
1232 [17] = 57750,
1233 [18] = 69300,
1234 [19] = 75075,
1235 [20] = 80850,
1236 };
1237
1238 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1239 return 0;
1240
1241 return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch;
1242}
1243
1244static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1245{
1246 static const u32 base[4][12] = {
1247 { 6500000,
1248 13000000,
1249 19500000,
1250 26000000,
1251 39000000,
1252 52000000,
1253 58500000,
1254 65000000,
1255 78000000,
1256
1257 86700000,
1258 97500000,
1259 108300000,
1260 },
1261 { 13500000,
1262 27000000,
1263 40500000,
1264 54000000,
1265 81000000,
1266 108000000,
1267 121500000,
1268 135000000,
1269 162000000,
1270 180000000,
1271 202500000,
1272 225000000,
1273 },
1274 { 29300000,
1275 58500000,
1276 87800000,
1277 117000000,
1278 175500000,
1279 234000000,
1280 263300000,
1281 292500000,
1282 351000000,
1283 390000000,
1284 438800000,
1285 487500000,
1286 },
1287 { 58500000,
1288 117000000,
1289 175500000,
1290 234000000,
1291 351000000,
1292 468000000,
1293 526500000,
1294 585000000,
1295 702000000,
1296 780000000,
1297 877500000,
1298 975000000,
1299 },
1300 };
1301 u32 bitrate;
1302 int idx;
1303
1304 if (rate->mcs > 11)
1305 goto warn;
1306
1307 switch (rate->bw) {
1308 case RATE_INFO_BW_160:
1309 idx = 3;
1310 break;
1311 case RATE_INFO_BW_80:
1312 idx = 2;
1313 break;
1314 case RATE_INFO_BW_40:
1315 idx = 1;
1316 break;
1317 case RATE_INFO_BW_5:
1318 case RATE_INFO_BW_10:
1319 default:
1320 goto warn;
1321 case RATE_INFO_BW_20:
1322 idx = 0;
1323 }
1324
1325 bitrate = base[idx][rate->mcs];
1326 bitrate *= rate->nss;
1327
1328 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1329 bitrate = (bitrate / 9) * 10;
1330
1331
1332 return (bitrate + 50000) / 100000;
1333 warn:
1334 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1335 rate->bw, rate->mcs, rate->nss);
1336 return 0;
1337}
1338
1339static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
1340{
1341#define SCALE 6144
1342 u32 mcs_divisors[14] = {
1343 102399,
1344 51201,
1345 34134,
1346 25599,
1347 17067,
1348 12801,
1349 11769,
1350 10239,
1351 8532,
1352 7680,
1353 6828,
1354 6144,
1355 5690,
1356 5120,
1357 };
1358 u32 rates_160M[3] = { 960777777, 907400000, 816666666 };
1359 u32 rates_969[3] = { 480388888, 453700000, 408333333 };
1360 u32 rates_484[3] = { 229411111, 216666666, 195000000 };
1361 u32 rates_242[3] = { 114711111, 108333333, 97500000 };
1362 u32 rates_106[3] = { 40000000, 37777777, 34000000 };
1363 u32 rates_52[3] = { 18820000, 17777777, 16000000 };
1364 u32 rates_26[3] = { 9411111, 8888888, 8000000 };
1365 u64 tmp;
1366 u32 result;
1367
1368 if (WARN_ON_ONCE(rate->mcs > 13))
1369 return 0;
1370
1371 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2))
1372 return 0;
1373 if (WARN_ON_ONCE(rate->he_ru_alloc >
1374 NL80211_RATE_INFO_HE_RU_ALLOC_2x996))
1375 return 0;
1376 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
1377 return 0;
1378
1379 if (rate->bw == RATE_INFO_BW_160)
1380 result = rates_160M[rate->he_gi];
1381 else if (rate->bw == RATE_INFO_BW_80 ||
1382 (rate->bw == RATE_INFO_BW_HE_RU &&
1383 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996))
1384 result = rates_969[rate->he_gi];
1385 else if (rate->bw == RATE_INFO_BW_40 ||
1386 (rate->bw == RATE_INFO_BW_HE_RU &&
1387 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484))
1388 result = rates_484[rate->he_gi];
1389 else if (rate->bw == RATE_INFO_BW_20 ||
1390 (rate->bw == RATE_INFO_BW_HE_RU &&
1391 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242))
1392 result = rates_242[rate->he_gi];
1393 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1394 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106)
1395 result = rates_106[rate->he_gi];
1396 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1397 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52)
1398 result = rates_52[rate->he_gi];
1399 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1400 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26)
1401 result = rates_26[rate->he_gi];
1402 else {
1403 WARN(1, "invalid HE MCS: bw:%d, ru:%d\n",
1404 rate->bw, rate->he_ru_alloc);
1405 return 0;
1406 }
1407
1408
1409 tmp = result;
1410 tmp *= SCALE;
1411 do_div(tmp, mcs_divisors[rate->mcs]);
1412 result = tmp;
1413
1414
1415 result = (result * rate->nss) / 8;
1416 if (rate->he_dcm)
1417 result /= 2;
1418
1419 return result / 10000;
1420}
1421
1422u32 cfg80211_calculate_bitrate(struct rate_info *rate)
1423{
1424 if (rate->flags & RATE_INFO_FLAGS_MCS)
1425 return cfg80211_calculate_bitrate_ht(rate);
1426 if (rate->flags & RATE_INFO_FLAGS_DMG)
1427 return cfg80211_calculate_bitrate_dmg(rate);
1428 if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG)
1429 return cfg80211_calculate_bitrate_extended_sc_dmg(rate);
1430 if (rate->flags & RATE_INFO_FLAGS_EDMG)
1431 return cfg80211_calculate_bitrate_edmg(rate);
1432 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1433 return cfg80211_calculate_bitrate_vht(rate);
1434 if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
1435 return cfg80211_calculate_bitrate_he(rate);
1436
1437 return rate->legacy;
1438}
1439EXPORT_SYMBOL(cfg80211_calculate_bitrate);
1440
1441int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1442 enum ieee80211_p2p_attr_id attr,
1443 u8 *buf, unsigned int bufsize)
1444{
1445 u8 *out = buf;
1446 u16 attr_remaining = 0;
1447 bool desired_attr = false;
1448 u16 desired_len = 0;
1449
1450 while (len > 0) {
1451 unsigned int iedatalen;
1452 unsigned int copy;
1453 const u8 *iedata;
1454
1455 if (len < 2)
1456 return -EILSEQ;
1457 iedatalen = ies[1];
1458 if (iedatalen + 2 > len)
1459 return -EILSEQ;
1460
1461 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1462 goto cont;
1463
1464 if (iedatalen < 4)
1465 goto cont;
1466
1467 iedata = ies + 2;
1468
1469
1470 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1471 iedata[2] != 0x9a || iedata[3] != 0x09)
1472 goto cont;
1473
1474 iedatalen -= 4;
1475 iedata += 4;
1476
1477
1478 copy = min_t(unsigned int, attr_remaining, iedatalen);
1479 if (copy && desired_attr) {
1480 desired_len += copy;
1481 if (out) {
1482 memcpy(out, iedata, min(bufsize, copy));
1483 out += min(bufsize, copy);
1484 bufsize -= min(bufsize, copy);
1485 }
1486
1487
1488 if (copy == attr_remaining)
1489 return desired_len;
1490 }
1491
1492 attr_remaining -= copy;
1493 if (attr_remaining)
1494 goto cont;
1495
1496 iedatalen -= copy;
1497 iedata += copy;
1498
1499 while (iedatalen > 0) {
1500 u16 attr_len;
1501
1502
1503 if (iedatalen < 3)
1504 return -EILSEQ;
1505 desired_attr = iedata[0] == attr;
1506 attr_len = get_unaligned_le16(iedata + 1);
1507 iedatalen -= 3;
1508 iedata += 3;
1509
1510 copy = min_t(unsigned int, attr_len, iedatalen);
1511
1512 if (desired_attr) {
1513 desired_len += copy;
1514 if (out) {
1515 memcpy(out, iedata, min(bufsize, copy));
1516 out += min(bufsize, copy);
1517 bufsize -= min(bufsize, copy);
1518 }
1519
1520 if (copy == attr_len)
1521 return desired_len;
1522 }
1523
1524 iedata += copy;
1525 iedatalen -= copy;
1526 attr_remaining = attr_len - copy;
1527 }
1528
1529 cont:
1530 len -= ies[1] + 2;
1531 ies += ies[1] + 2;
1532 }
1533
1534 if (attr_remaining && desired_attr)
1535 return -EILSEQ;
1536
1537 return -ENOENT;
1538}
1539EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1540
1541static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext)
1542{
1543 int i;
1544
1545
1546 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION))
1547 return false;
1548
1549 i = 0;
1550 while (i < n_ids) {
1551 if (ids[i] == WLAN_EID_EXTENSION) {
1552 if (id_ext && (ids[i + 1] == id))
1553 return true;
1554
1555 i += 2;
1556 continue;
1557 }
1558
1559 if (ids[i] == id && !id_ext)
1560 return true;
1561
1562 i++;
1563 }
1564 return false;
1565}
1566
1567static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1568{
1569
1570 u8 len = ies[pos + 1];
1571
1572 pos += 2 + len;
1573
1574
1575 if (len < 255)
1576 return pos;
1577
1578 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1579 len = ies[pos + 1];
1580 pos += 2 + len;
1581 }
1582
1583 return pos;
1584}
1585
1586size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1587 const u8 *ids, int n_ids,
1588 const u8 *after_ric, int n_after_ric,
1589 size_t offset)
1590{
1591 size_t pos = offset;
1592
1593 while (pos < ielen) {
1594 u8 ext = 0;
1595
1596 if (ies[pos] == WLAN_EID_EXTENSION)
1597 ext = 2;
1598 if ((pos + ext) >= ielen)
1599 break;
1600
1601 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext],
1602 ies[pos] == WLAN_EID_EXTENSION))
1603 break;
1604
1605 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
1606 pos = skip_ie(ies, ielen, pos);
1607
1608 while (pos < ielen) {
1609 if (ies[pos] == WLAN_EID_EXTENSION)
1610 ext = 2;
1611 else
1612 ext = 0;
1613
1614 if ((pos + ext) >= ielen)
1615 break;
1616
1617 if (!ieee80211_id_in_list(after_ric,
1618 n_after_ric,
1619 ies[pos + ext],
1620 ext == 2))
1621 pos = skip_ie(ies, ielen, pos);
1622 else
1623 break;
1624 }
1625 } else {
1626 pos = skip_ie(ies, ielen, pos);
1627 }
1628 }
1629
1630 return pos;
1631}
1632EXPORT_SYMBOL(ieee80211_ie_split_ric);
1633
1634bool ieee80211_operating_class_to_band(u8 operating_class,
1635 enum nl80211_band *band)
1636{
1637 switch (operating_class) {
1638 case 112:
1639 case 115 ... 127:
1640 case 128 ... 130:
1641 *band = NL80211_BAND_5GHZ;
1642 return true;
1643 case 131 ... 135:
1644 *band = NL80211_BAND_6GHZ;
1645 return true;
1646 case 81:
1647 case 82:
1648 case 83:
1649 case 84:
1650 *band = NL80211_BAND_2GHZ;
1651 return true;
1652 case 180:
1653 *band = NL80211_BAND_60GHZ;
1654 return true;
1655 }
1656
1657 return false;
1658}
1659EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1660
1661bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1662 u8 *op_class)
1663{
1664 u8 vht_opclass;
1665 u32 freq = chandef->center_freq1;
1666
1667 if (freq >= 2412 && freq <= 2472) {
1668 if (chandef->width > NL80211_CHAN_WIDTH_40)
1669 return false;
1670
1671
1672 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1673 if (freq > chandef->chan->center_freq)
1674 *op_class = 83;
1675 else
1676 *op_class = 84;
1677 } else {
1678 *op_class = 81;
1679 }
1680
1681 return true;
1682 }
1683
1684 if (freq == 2484) {
1685
1686 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
1687 return false;
1688
1689 *op_class = 82;
1690 return true;
1691 }
1692
1693 switch (chandef->width) {
1694 case NL80211_CHAN_WIDTH_80:
1695 vht_opclass = 128;
1696 break;
1697 case NL80211_CHAN_WIDTH_160:
1698 vht_opclass = 129;
1699 break;
1700 case NL80211_CHAN_WIDTH_80P80:
1701 vht_opclass = 130;
1702 break;
1703 case NL80211_CHAN_WIDTH_10:
1704 case NL80211_CHAN_WIDTH_5:
1705 return false;
1706 default:
1707 vht_opclass = 0;
1708 break;
1709 }
1710
1711
1712 if (freq >= 5180 && freq <= 5240) {
1713 if (vht_opclass) {
1714 *op_class = vht_opclass;
1715 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1716 if (freq > chandef->chan->center_freq)
1717 *op_class = 116;
1718 else
1719 *op_class = 117;
1720 } else {
1721 *op_class = 115;
1722 }
1723
1724 return true;
1725 }
1726
1727
1728 if (freq >= 5260 && freq <= 5320) {
1729 if (vht_opclass) {
1730 *op_class = vht_opclass;
1731 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1732 if (freq > chandef->chan->center_freq)
1733 *op_class = 119;
1734 else
1735 *op_class = 120;
1736 } else {
1737 *op_class = 118;
1738 }
1739
1740 return true;
1741 }
1742
1743
1744 if (freq >= 5500 && freq <= 5720) {
1745 if (vht_opclass) {
1746 *op_class = vht_opclass;
1747 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1748 if (freq > chandef->chan->center_freq)
1749 *op_class = 122;
1750 else
1751 *op_class = 123;
1752 } else {
1753 *op_class = 121;
1754 }
1755
1756 return true;
1757 }
1758
1759
1760 if (freq >= 5745 && freq <= 5845) {
1761 if (vht_opclass) {
1762 *op_class = vht_opclass;
1763 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1764 if (freq > chandef->chan->center_freq)
1765 *op_class = 126;
1766 else
1767 *op_class = 127;
1768 } else if (freq <= 5805) {
1769 *op_class = 124;
1770 } else {
1771 *op_class = 125;
1772 }
1773
1774 return true;
1775 }
1776
1777
1778 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) {
1779 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1780 return false;
1781
1782 *op_class = 180;
1783 return true;
1784 }
1785
1786
1787 return false;
1788}
1789EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1790
1791static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1792 u32 *beacon_int_gcd,
1793 bool *beacon_int_different)
1794{
1795 struct wireless_dev *wdev;
1796
1797 *beacon_int_gcd = 0;
1798 *beacon_int_different = false;
1799
1800 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
1801 if (!wdev->beacon_interval)
1802 continue;
1803
1804 if (!*beacon_int_gcd) {
1805 *beacon_int_gcd = wdev->beacon_interval;
1806 continue;
1807 }
1808
1809 if (wdev->beacon_interval == *beacon_int_gcd)
1810 continue;
1811
1812 *beacon_int_different = true;
1813 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1814 }
1815
1816 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1817 if (*beacon_int_gcd)
1818 *beacon_int_different = true;
1819 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
1820 }
1821}
1822
1823int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1824 enum nl80211_iftype iftype, u32 beacon_int)
1825{
1826
1827
1828
1829
1830
1831
1832
1833
1834 if (beacon_int < 10 || beacon_int > 10000)
1835 return -EINVAL;
1836
1837 return 0;
1838}
1839
1840int cfg80211_iter_combinations(struct wiphy *wiphy,
1841 struct iface_combination_params *params,
1842 void (*iter)(const struct ieee80211_iface_combination *c,
1843 void *data),
1844 void *data)
1845{
1846 const struct ieee80211_regdomain *regdom;
1847 enum nl80211_dfs_regions region = 0;
1848 int i, j, iftype;
1849 int num_interfaces = 0;
1850 u32 used_iftypes = 0;
1851 u32 beacon_int_gcd;
1852 bool beacon_int_different;
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1865 &beacon_int_gcd, &beacon_int_different);
1866
1867 if (params->radar_detect) {
1868 rcu_read_lock();
1869 regdom = rcu_dereference(cfg80211_regdomain);
1870 if (regdom)
1871 region = regdom->dfs_region;
1872 rcu_read_unlock();
1873 }
1874
1875 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1876 num_interfaces += params->iftype_num[iftype];
1877 if (params->iftype_num[iftype] > 0 &&
1878 !cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
1879 used_iftypes |= BIT(iftype);
1880 }
1881
1882 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1883 const struct ieee80211_iface_combination *c;
1884 struct ieee80211_iface_limit *limits;
1885 u32 all_iftypes = 0;
1886
1887 c = &wiphy->iface_combinations[i];
1888
1889 if (num_interfaces > c->max_interfaces)
1890 continue;
1891 if (params->num_different_channels > c->num_different_channels)
1892 continue;
1893
1894 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1895 GFP_KERNEL);
1896 if (!limits)
1897 return -ENOMEM;
1898
1899 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1900 if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
1901 continue;
1902 for (j = 0; j < c->n_limits; j++) {
1903 all_iftypes |= limits[j].types;
1904 if (!(limits[j].types & BIT(iftype)))
1905 continue;
1906 if (limits[j].max < params->iftype_num[iftype])
1907 goto cont;
1908 limits[j].max -= params->iftype_num[iftype];
1909 }
1910 }
1911
1912 if (params->radar_detect !=
1913 (c->radar_detect_widths & params->radar_detect))
1914 goto cont;
1915
1916 if (params->radar_detect && c->radar_detect_regions &&
1917 !(c->radar_detect_regions & BIT(region)))
1918 goto cont;
1919
1920
1921
1922
1923
1924
1925 if ((all_iftypes & used_iftypes) != used_iftypes)
1926 goto cont;
1927
1928 if (beacon_int_gcd) {
1929 if (c->beacon_int_min_gcd &&
1930 beacon_int_gcd < c->beacon_int_min_gcd)
1931 goto cont;
1932 if (!c->beacon_int_min_gcd && beacon_int_different)
1933 goto cont;
1934 }
1935
1936
1937
1938
1939
1940 (*iter)(c, data);
1941 cont:
1942 kfree(limits);
1943 }
1944
1945 return 0;
1946}
1947EXPORT_SYMBOL(cfg80211_iter_combinations);
1948
1949static void
1950cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1951 void *data)
1952{
1953 int *num = data;
1954 (*num)++;
1955}
1956
1957int cfg80211_check_combinations(struct wiphy *wiphy,
1958 struct iface_combination_params *params)
1959{
1960 int err, num = 0;
1961
1962 err = cfg80211_iter_combinations(wiphy, params,
1963 cfg80211_iter_sum_ifcombs, &num);
1964 if (err)
1965 return err;
1966 if (num == 0)
1967 return -EBUSY;
1968
1969 return 0;
1970}
1971EXPORT_SYMBOL(cfg80211_check_combinations);
1972
1973int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1974 const u8 *rates, unsigned int n_rates,
1975 u32 *mask)
1976{
1977 int i, j;
1978
1979 if (!sband)
1980 return -EINVAL;
1981
1982 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1983 return -EINVAL;
1984
1985 *mask = 0;
1986
1987 for (i = 0; i < n_rates; i++) {
1988 int rate = (rates[i] & 0x7f) * 5;
1989 bool found = false;
1990
1991 for (j = 0; j < sband->n_bitrates; j++) {
1992 if (sband->bitrates[j].bitrate == rate) {
1993 found = true;
1994 *mask |= BIT(j);
1995 break;
1996 }
1997 }
1998 if (!found)
1999 return -EINVAL;
2000 }
2001
2002
2003
2004
2005
2006
2007
2008 return 0;
2009}
2010
2011unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
2012{
2013 enum nl80211_band band;
2014 unsigned int n_channels = 0;
2015
2016 for (band = 0; band < NUM_NL80211_BANDS; band++)
2017 if (wiphy->bands[band])
2018 n_channels += wiphy->bands[band]->n_channels;
2019
2020 return n_channels;
2021}
2022EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
2023
2024int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
2025 struct station_info *sinfo)
2026{
2027 struct cfg80211_registered_device *rdev;
2028 struct wireless_dev *wdev;
2029
2030 wdev = dev->ieee80211_ptr;
2031 if (!wdev)
2032 return -EOPNOTSUPP;
2033
2034 rdev = wiphy_to_rdev(wdev->wiphy);
2035 if (!rdev->ops->get_station)
2036 return -EOPNOTSUPP;
2037
2038 memset(sinfo, 0, sizeof(*sinfo));
2039
2040 return rdev_get_station(rdev, dev, mac_addr, sinfo);
2041}
2042EXPORT_SYMBOL(cfg80211_get_station);
2043
2044void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
2045{
2046 int i;
2047
2048 if (!f)
2049 return;
2050
2051 kfree(f->serv_spec_info);
2052 kfree(f->srf_bf);
2053 kfree(f->srf_macs);
2054 for (i = 0; i < f->num_rx_filters; i++)
2055 kfree(f->rx_filters[i].filter);
2056
2057 for (i = 0; i < f->num_tx_filters; i++)
2058 kfree(f->tx_filters[i].filter);
2059
2060 kfree(f->rx_filters);
2061 kfree(f->tx_filters);
2062 kfree(f);
2063}
2064EXPORT_SYMBOL(cfg80211_free_nan_func);
2065
2066bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
2067 u32 center_freq_khz, u32 bw_khz)
2068{
2069 u32 start_freq_khz, end_freq_khz;
2070
2071 start_freq_khz = center_freq_khz - (bw_khz / 2);
2072 end_freq_khz = center_freq_khz + (bw_khz / 2);
2073
2074 if (start_freq_khz >= freq_range->start_freq_khz &&
2075 end_freq_khz <= freq_range->end_freq_khz)
2076 return true;
2077
2078 return false;
2079}
2080
2081int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp)
2082{
2083 sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1,
2084 sizeof(*(sinfo->pertid)),
2085 gfp);
2086 if (!sinfo->pertid)
2087 return -ENOMEM;
2088
2089 return 0;
2090}
2091EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats);
2092
2093
2094
2095const unsigned char rfc1042_header[] __aligned(2) =
2096 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2097EXPORT_SYMBOL(rfc1042_header);
2098
2099
2100const unsigned char bridge_tunnel_header[] __aligned(2) =
2101 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
2102EXPORT_SYMBOL(bridge_tunnel_header);
2103
2104
2105struct iapp_layer2_update {
2106 u8 da[ETH_ALEN];
2107 u8 sa[ETH_ALEN];
2108 __be16 len;
2109 u8 dsap;
2110 u8 ssap;
2111 u8 control;
2112 u8 xid_info[3];
2113} __packed;
2114
2115void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr)
2116{
2117 struct iapp_layer2_update *msg;
2118 struct sk_buff *skb;
2119
2120
2121
2122
2123 skb = dev_alloc_skb(sizeof(*msg));
2124 if (!skb)
2125 return;
2126 msg = skb_put(skb, sizeof(*msg));
2127
2128
2129
2130
2131 eth_broadcast_addr(msg->da);
2132 ether_addr_copy(msg->sa, addr);
2133 msg->len = htons(6);
2134 msg->dsap = 0;
2135 msg->ssap = 0x01;
2136 msg->control = 0xaf;
2137
2138 msg->xid_info[0] = 0x81;
2139 msg->xid_info[1] = 1;
2140 msg->xid_info[2] = 0;
2141
2142 skb->dev = dev;
2143 skb->protocol = eth_type_trans(skb, dev);
2144 memset(skb->cb, 0, sizeof(skb->cb));
2145 netif_rx_ni(skb);
2146}
2147EXPORT_SYMBOL(cfg80211_send_layer2_update);
2148
2149int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
2150 enum ieee80211_vht_chanwidth bw,
2151 int mcs, bool ext_nss_bw_capable,
2152 unsigned int max_vht_nss)
2153{
2154 u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map);
2155 int ext_nss_bw;
2156 int supp_width;
2157 int i, mcs_encoding;
2158
2159 if (map == 0xffff)
2160 return 0;
2161
2162 if (WARN_ON(mcs > 9 || max_vht_nss > 8))
2163 return 0;
2164 if (mcs <= 7)
2165 mcs_encoding = 0;
2166 else if (mcs == 8)
2167 mcs_encoding = 1;
2168 else
2169 mcs_encoding = 2;
2170
2171 if (!max_vht_nss) {
2172
2173 for (i = 7; i >= 0; i--) {
2174 int supp = (map >> (2 * i)) & 3;
2175
2176 if (supp == 3)
2177 continue;
2178
2179 if (supp >= mcs_encoding) {
2180 max_vht_nss = i + 1;
2181 break;
2182 }
2183 }
2184 }
2185
2186 if (!(cap->supp_mcs.tx_mcs_map &
2187 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
2188 return max_vht_nss;
2189
2190 ext_nss_bw = le32_get_bits(cap->vht_cap_info,
2191 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2192 supp_width = le32_get_bits(cap->vht_cap_info,
2193 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2194
2195
2196 if (!ext_nss_bw_capable)
2197 ext_nss_bw = 0;
2198
2199
2200 if (supp_width == 3)
2201 return 0;
2202
2203
2204 if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2))
2205 return 0;
2206
2207
2208
2209
2210
2211
2212 switch (bw) {
2213 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2214 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2215 if ((supp_width == 1 || supp_width == 2) &&
2216 ext_nss_bw == 3)
2217 return 2 * max_vht_nss;
2218 break;
2219 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2220 if (supp_width == 0 &&
2221 (ext_nss_bw == 1 || ext_nss_bw == 2))
2222 return max_vht_nss / 2;
2223 if (supp_width == 0 &&
2224 ext_nss_bw == 3)
2225 return (3 * max_vht_nss) / 4;
2226 if (supp_width == 1 &&
2227 ext_nss_bw == 3)
2228 return 2 * max_vht_nss;
2229 break;
2230 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2231 if (supp_width == 0 && ext_nss_bw == 1)
2232 return 0;
2233 if (supp_width == 0 &&
2234 ext_nss_bw == 2)
2235 return max_vht_nss / 2;
2236 if (supp_width == 0 &&
2237 ext_nss_bw == 3)
2238 return (3 * max_vht_nss) / 4;
2239 if (supp_width == 1 &&
2240 ext_nss_bw == 0)
2241 return 0;
2242 if (supp_width == 1 &&
2243 ext_nss_bw == 1)
2244 return max_vht_nss / 2;
2245 if (supp_width == 1 &&
2246 ext_nss_bw == 2)
2247 return (3 * max_vht_nss) / 4;
2248 break;
2249 }
2250
2251
2252 return max_vht_nss;
2253}
2254EXPORT_SYMBOL(ieee80211_get_vht_max_nss);
2255
2256bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
2257 bool is_4addr, u8 check_swif)
2258
2259{
2260 bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN;
2261
2262 switch (check_swif) {
2263 case 0:
2264 if (is_vlan && is_4addr)
2265 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
2266 return wiphy->interface_modes & BIT(iftype);
2267 case 1:
2268 if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan)
2269 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
2270 return wiphy->software_iftypes & BIT(iftype);
2271 default:
2272 break;
2273 }
2274
2275 return false;
2276}
2277EXPORT_SYMBOL(cfg80211_iftype_allowed);
2278
