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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Wireless utility functions
4 *
5 * Copyright 2007-2009 Johannes Berg <[email protected]>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2023, 2025-2026 Intel Corporation
9 */
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
27const struct 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{
48 struct ieee80211_rate *bitrates;
49 u32 mandatory_rates = 0;
50 enum ieee80211_rate_flags mandatory_flag;
51 int i;
52
53 if (WARN_ON(!sband))
54 return 1;
55
56 if (sband->band == NL80211_BAND_2GHZ)
57 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
58 else
59 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
60
61 bitrates = sband->bitrates;
62 for (i = 0; i < sband->n_bitrates; i++)
63 if (bitrates[i].flags & mandatory_flag)
64 mandatory_rates |= BIT(i);
65 return mandatory_rates;
66}
67EXPORT_SYMBOL(ieee80211_mandatory_rates);
68
69u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band)
70{
71 /* see 802.11 17.3.8.3.2 and Annex J
72 * there are overlapping channel numbers in 5GHz and 2GHz bands */
73 if (chan <= 0)
74 return 0; /* not supported */
75 switch (band) {
76 case NL80211_BAND_2GHZ:
77 case NL80211_BAND_LC:
78 if (chan == 14)
79 return MHZ_TO_KHZ(2484);
80 else if (chan < 14)
81 return MHZ_TO_KHZ(2407 + chan * 5);
82 break;
83 case NL80211_BAND_5GHZ:
84 if (chan >= 182 && chan <= 196)
85 return MHZ_TO_KHZ(4000 + chan * 5);
86 else
87 return MHZ_TO_KHZ(5000 + chan * 5);
88 break;
89 case NL80211_BAND_6GHZ:
90 /* see 802.11ax D6.1 27.3.23.2 */
91 if (chan == 2)
92 return MHZ_TO_KHZ(5935);
93 if (chan <= 253)
94 return MHZ_TO_KHZ(5950 + chan * 5);
95 break;
96 case NL80211_BAND_60GHZ:
97 if (chan < 7)
98 return MHZ_TO_KHZ(56160 + chan * 2160);
99 break;
100 case NL80211_BAND_S1GHZ:
101 return 902000 + chan * 500;
102 default:
103 ;
104 }
105 return 0; /* not supported */
106}
107EXPORT_SYMBOL(ieee80211_channel_to_freq_khz);
108
109int ieee80211_freq_khz_to_channel(u32 freq)
110{
111 /* TODO: just handle MHz for now */
112 freq = KHZ_TO_MHZ(freq);
113
114 /* see 802.11 17.3.8.3.2 and Annex J */
115 if (freq == 2484)
116 return 14;
117 else if (freq < 2484)
118 return (freq - 2407) / 5;
119 else if (freq >= 4910 && freq <= 4980)
120 return (freq - 4000) / 5;
121 else if (freq < 5925)
122 return (freq - 5000) / 5;
123 else if (freq == 5935)
124 return 2;
125 else if (freq <= 45000) /* DMG band lower limit */
126 /* see 802.11ax D6.1 27.3.22.2 */
127 return (freq - 5950) / 5;
128 else if (freq >= 58320 && freq <= 70200)
129 return (freq - 56160) / 2160;
130 else
131 return 0;
132}
133EXPORT_SYMBOL(ieee80211_freq_khz_to_channel);
134
135struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy,
136 u32 freq)
137{
138 enum nl80211_band band;
139 struct ieee80211_supported_band *sband;
140 int i;
141
142 for (band = 0; band < NUM_NL80211_BANDS; band++) {
143 sband = wiphy->bands[band];
144
145 if (!sband)
146 continue;
147
148 for (i = 0; i < sband->n_channels; i++) {
149 struct ieee80211_channel *chan = &sband->channels[i];
150
151 if (ieee80211_channel_to_khz(chan) == freq)
152 return chan;
153 }
154 }
155
156 return NULL;
157}
158EXPORT_SYMBOL(ieee80211_get_channel_khz);
159
160static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
161{
162 int i, want;
163
164 switch (sband->band) {
165 case NL80211_BAND_5GHZ:
166 case NL80211_BAND_6GHZ:
167 want = 3;
168 for (i = 0; i < sband->n_bitrates; i++) {
169 if (sband->bitrates[i].bitrate == 60 ||
170 sband->bitrates[i].bitrate == 120 ||
171 sband->bitrates[i].bitrate == 240) {
172 sband->bitrates[i].flags |=
173 IEEE80211_RATE_MANDATORY_A;
174 want--;
175 }
176 }
177 WARN_ON(want);
178 break;
179 case NL80211_BAND_2GHZ:
180 case NL80211_BAND_LC:
181 want = 7;
182 for (i = 0; i < sband->n_bitrates; i++) {
183 switch (sband->bitrates[i].bitrate) {
184 case 10:
185 case 20:
186 case 55:
187 case 110:
188 sband->bitrates[i].flags |=
189 IEEE80211_RATE_MANDATORY_B |
190 IEEE80211_RATE_MANDATORY_G;
191 want--;
192 break;
193 case 60:
194 case 120:
195 case 240:
196 sband->bitrates[i].flags |=
197 IEEE80211_RATE_MANDATORY_G;
198 want--;
199 fallthrough;
200 default:
201 sband->bitrates[i].flags |=
202 IEEE80211_RATE_ERP_G;
203 break;
204 }
205 }
206 WARN_ON(want != 0 && want != 3);
207 break;
208 case NL80211_BAND_60GHZ:
209 /* check for mandatory HT MCS 1..4 */
210 WARN_ON(!sband->ht_cap.ht_supported);
211 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
212 break;
213 case NL80211_BAND_S1GHZ:
214 /* Figure 9-589bd: 3 means unsupported, so != 3 means at least
215 * mandatory is ok.
216 */
217 WARN_ON((sband->s1g_cap.nss_mcs[0] & 0x3) == 0x3);
218 break;
219 case NUM_NL80211_BANDS:
220 default:
221 WARN_ON(1);
222 break;
223 }
224}
225
226void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
227{
228 enum nl80211_band band;
229
230 for (band = 0; band < NUM_NL80211_BANDS; band++)
231 if (wiphy->bands[band])
232 set_mandatory_flags_band(wiphy->bands[band]);
233}
234
235bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
236{
237 int i;
238 for (i = 0; i < wiphy->n_cipher_suites; i++)
239 if (cipher == wiphy->cipher_suites[i])
240 return true;
241 return false;
242}
243
244static bool cfg80211_igtk_cipher_supported(struct wiphy *wiphy)
245{
246 int i;
247
248 for (i = 0; i < wiphy->n_cipher_suites; i++) {
249 switch (wiphy->cipher_suites[i]) {
250 case WLAN_CIPHER_SUITE_AES_CMAC:
251 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
252 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
253 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
254 return true;
255 }
256 }
257
258 return false;
259}
260
261bool cfg80211_valid_key_idx(struct wireless_dev *wdev,
262 int key_idx, bool pairwise,
263 const u8 *mac_addr)
264{
265 if (WARN_ON(!wdev))
266 return false;
267
268 if (key_idx < 0)
269 return false;
270
271 /*
272 * Can't differentiate ciphers here so allow 0..3.
273 * Pairwise keys must be for a station (MAC address given).
274 */
275 if (pairwise) {
276 if (!mac_addr)
277 return false;
278
279 return key_idx < 4;
280 }
281
282 /*
283 * For group keys, mac_addr==NULL means setting a group key
284 * for TX, which is only supported on some interface types,
285 * except for STATION/P2P_CLIENT, where it's setting the RX
286 * key with the current AP (for legacy reasons.)
287 *
288 * Apart from that exception, a non-NULL mac_addr means RX
289 * key being set.
290 */
291
292 switch (wdev->iftype) {
293 case NL80211_IFTYPE_ADHOC:
294 if (!(wdev->wiphy->flags & WIPHY_FLAG_IBSS_RSN))
295 return false;
296 fallthrough;
297 case NL80211_IFTYPE_MESH_POINT:
298 /* no support for IGTK/BIGTK (yet?) */
299 return key_idx < 4;
300 case NL80211_IFTYPE_NAN_DATA:
301 /* these always need to support per-STA GTK */
302 return key_idx < 4;
303 case NL80211_IFTYPE_NAN:
304 /* no data */
305 if (key_idx < 4)
306 return false;
307 /* NAN reused this flag */
308 if (wiphy_ext_feature_isset(wdev->wiphy,
309 NL80211_EXT_FEATURE_BEACON_PROTECTION))
310 return key_idx <= 7;
311 return key_idx <= 5;
312 case NL80211_IFTYPE_STATION:
313 case NL80211_IFTYPE_P2P_CLIENT:
314 /* see note about exception above */
315 if (mac_addr)
316 return false;
317 /* BIGTK support implies IGTK support */
318 if (wiphy_ext_feature_isset(wdev->wiphy,
319 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
320 return key_idx <= 7;
321 fallthrough;
322 case NL80211_IFTYPE_AP:
323 case NL80211_IFTYPE_P2P_GO:
324 /* no RX with [B]IGTK */
325 if (mac_addr)
326 return false;
327 if (wiphy_ext_feature_isset(wdev->wiphy,
328 NL80211_EXT_FEATURE_BEACON_PROTECTION))
329 return key_idx <= 7;
330 fallthrough;
331 case NL80211_IFTYPE_AP_VLAN:
332 /* no RX with GTK */
333 if (mac_addr)
334 return false;
335 if (cfg80211_igtk_cipher_supported(wdev->wiphy))
336 return key_idx <= 5;
337 return key_idx <= 3;
338 default:
339 return false;
340 }
341}
342
343int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
344 struct wireless_dev *wdev,
345 struct key_params *params, int key_idx,
346 bool pairwise, const u8 *mac_addr)
347{
348 if (!cfg80211_valid_key_idx(wdev, key_idx, pairwise, mac_addr))
349 return -EINVAL;
350
351 switch (params->cipher) {
352 case WLAN_CIPHER_SUITE_TKIP:
353 /* Extended Key ID can only be used with CCMP/GCMP ciphers */
354 if ((pairwise && key_idx) ||
355 params->mode != NL80211_KEY_RX_TX)
356 return -EINVAL;
357 break;
358 case WLAN_CIPHER_SUITE_CCMP:
359 case WLAN_CIPHER_SUITE_CCMP_256:
360 case WLAN_CIPHER_SUITE_GCMP:
361 case WLAN_CIPHER_SUITE_GCMP_256:
362 /* IEEE802.11-2016 allows only 0 and - when supporting
363 * Extended Key ID - 1 as index for pairwise keys.
364 * @NL80211_KEY_NO_TX is only allowed for pairwise keys when
365 * the driver supports Extended Key ID.
366 * @NL80211_KEY_SET_TX can't be set when installing and
367 * validating a key.
368 */
369 if ((params->mode == NL80211_KEY_NO_TX && !pairwise) ||
370 params->mode == NL80211_KEY_SET_TX)
371 return -EINVAL;
372 if (wiphy_ext_feature_isset(&rdev->wiphy,
373 NL80211_EXT_FEATURE_EXT_KEY_ID)) {
374 if (pairwise && (key_idx < 0 || key_idx > 1))
375 return -EINVAL;
376 } else if (pairwise && key_idx) {
377 return -EINVAL;
378 }
379 break;
380 case WLAN_CIPHER_SUITE_AES_CMAC:
381 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
382 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
383 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
384 /* Disallow BIP (group-only) cipher as pairwise cipher */
385 if (pairwise)
386 return -EINVAL;
387 if (key_idx < 4)
388 return -EINVAL;
389 break;
390 case WLAN_CIPHER_SUITE_WEP40:
391 case WLAN_CIPHER_SUITE_WEP104:
392 if (key_idx > 3)
393 return -EINVAL;
394 break;
395 default:
396 break;
397 }
398
399 /*
400 * Per Wi-Fi Aware v4.0 section 7.1.2, NAN Data interfaces
401 * shall only use CCMP-128 or GCMP-256.
402 */
403 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA &&
404 params->cipher != WLAN_CIPHER_SUITE_CCMP &&
405 params->cipher != WLAN_CIPHER_SUITE_GCMP_256)
406 return -EINVAL;
407
408 switch (params->cipher) {
409 case WLAN_CIPHER_SUITE_WEP40:
410 if (params->key_len != WLAN_KEY_LEN_WEP40)
411 return -EINVAL;
412 break;
413 case WLAN_CIPHER_SUITE_TKIP:
414 if (params->key_len != WLAN_KEY_LEN_TKIP)
415 return -EINVAL;
416 break;
417 case WLAN_CIPHER_SUITE_CCMP:
418 if (params->key_len != WLAN_KEY_LEN_CCMP)
419 return -EINVAL;
420 break;
421 case WLAN_CIPHER_SUITE_CCMP_256:
422 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
423 return -EINVAL;
424 break;
425 case WLAN_CIPHER_SUITE_GCMP:
426 if (params->key_len != WLAN_KEY_LEN_GCMP)
427 return -EINVAL;
428 break;
429 case WLAN_CIPHER_SUITE_GCMP_256:
430 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
431 return -EINVAL;
432 break;
433 case WLAN_CIPHER_SUITE_WEP104:
434 if (params->key_len != WLAN_KEY_LEN_WEP104)
435 return -EINVAL;
436 break;
437 case WLAN_CIPHER_SUITE_AES_CMAC:
438 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
439 return -EINVAL;
440 break;
441 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
442 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
443 return -EINVAL;
444 break;
445 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
446 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
447 return -EINVAL;
448 break;
449 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
450 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
451 return -EINVAL;
452 break;
453 default:
454 /*
455 * We don't know anything about this algorithm,
456 * allow using it -- but the driver must check
457 * all parameters! We still check below whether
458 * or not the driver supports this algorithm,
459 * of course.
460 */
461 break;
462 }
463
464 if (params->seq) {
465 switch (params->cipher) {
466 case WLAN_CIPHER_SUITE_WEP40:
467 case WLAN_CIPHER_SUITE_WEP104:
468 /* These ciphers do not use key sequence */
469 return -EINVAL;
470 case WLAN_CIPHER_SUITE_TKIP:
471 case WLAN_CIPHER_SUITE_CCMP:
472 case WLAN_CIPHER_SUITE_CCMP_256:
473 case WLAN_CIPHER_SUITE_GCMP:
474 case WLAN_CIPHER_SUITE_GCMP_256:
475 case WLAN_CIPHER_SUITE_AES_CMAC:
476 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
477 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
478 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
479 if (params->seq_len != 6)
480 return -EINVAL;
481 break;
482 }
483 }
484
485 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
486 return -EINVAL;
487
488 if (params->ltf_keyseed) {
489 if (!wiphy_ext_feature_isset(&rdev->wiphy,
490 NL80211_EXT_FEATURE_SECURE_LTF) ||
491 !wiphy_ext_feature_isset(&rdev->wiphy,
492 NL80211_EXT_FEATURE_SET_KEY_LTF_SEED))
493 return -EOPNOTSUPP;
494
495 /*
496 * LTF key seed is pairwise key material and must only be
497 * used with a pairwise key
498 */
499 if (!pairwise)
500 return -EINVAL;
501 }
502
503 return 0;
504}
505
506unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
507{
508 unsigned int hdrlen = 24;
509
510 if (ieee80211_is_ext(fc)) {
511 hdrlen = 4;
512 goto out;
513 }
514
515 if (ieee80211_is_data(fc)) {
516 if (ieee80211_has_a4(fc))
517 hdrlen = 30;
518 if (ieee80211_is_data_qos(fc)) {
519 hdrlen += IEEE80211_QOS_CTL_LEN;
520 if (ieee80211_has_order(fc))
521 hdrlen += IEEE80211_HT_CTL_LEN;
522 }
523 goto out;
524 }
525
526 if (ieee80211_is_mgmt(fc)) {
527 if (ieee80211_has_order(fc))
528 hdrlen += IEEE80211_HT_CTL_LEN;
529 goto out;
530 }
531
532 if (ieee80211_is_ctl(fc)) {
533 /*
534 * ACK and CTS are 10 bytes, all others 16. To see how
535 * to get this condition consider
536 * subtype mask: 0b0000000011110000 (0x00F0)
537 * ACK subtype: 0b0000000011010000 (0x00D0)
538 * CTS subtype: 0b0000000011000000 (0x00C0)
539 * bits that matter: ^^^ (0x00E0)
540 * value of those: 0b0000000011000000 (0x00C0)
541 */
542 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
543 hdrlen = 10;
544 else
545 hdrlen = 16;
546 }
547out:
548 return hdrlen;
549}
550EXPORT_SYMBOL(ieee80211_hdrlen);
551
552unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
553{
554 const struct ieee80211_hdr *hdr =
555 (const struct ieee80211_hdr *)skb->data;
556 unsigned int hdrlen;
557
558 if (unlikely(skb->len < 10))
559 return 0;
560 hdrlen = ieee80211_hdrlen(hdr->frame_control);
561 if (unlikely(hdrlen > skb->len))
562 return 0;
563 return hdrlen;
564}
565EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
566
567static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
568{
569 int ae = flags & MESH_FLAGS_AE;
570 /* 802.11-2012, 8.2.4.7.3 */
571 switch (ae) {
572 default:
573 case 0:
574 return 6;
575 case MESH_FLAGS_AE_A4:
576 return 12;
577 case MESH_FLAGS_AE_A5_A6:
578 return 18;
579 }
580}
581
582unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
583{
584 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
585}
586EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
587
588bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto)
589{
590 const __be16 *hdr_proto = hdr + ETH_ALEN;
591
592 if (!(ether_addr_equal(hdr, rfc1042_header) &&
593 *hdr_proto != htons(ETH_P_AARP) &&
594 *hdr_proto != htons(ETH_P_IPX)) &&
595 !ether_addr_equal(hdr, bridge_tunnel_header))
596 return false;
597
598 *proto = *hdr_proto;
599
600 return true;
601}
602EXPORT_SYMBOL(ieee80211_get_8023_tunnel_proto);
603
604int ieee80211_strip_8023_mesh_hdr(struct sk_buff *skb)
605{
606 const void *mesh_addr;
607 struct {
608 struct ethhdr eth;
609 u8 flags;
610 } payload;
611 int hdrlen;
612 int ret;
613
614 ret = skb_copy_bits(skb, 0, &payload, sizeof(payload));
615 if (ret)
616 return ret;
617
618 hdrlen = sizeof(payload.eth) + __ieee80211_get_mesh_hdrlen(payload.flags);
619
620 if (likely(pskb_may_pull(skb, hdrlen + 8) &&
621 ieee80211_get_8023_tunnel_proto(skb->data + hdrlen,
622 &payload.eth.h_proto)))
623 hdrlen += ETH_ALEN + 2;
624 else if (!pskb_may_pull(skb, hdrlen))
625 return -EINVAL;
626 else
627 payload.eth.h_proto = htons(skb->len - hdrlen);
628
629 mesh_addr = skb->data + sizeof(payload.eth) + ETH_ALEN;
630 switch (payload.flags & MESH_FLAGS_AE) {
631 case MESH_FLAGS_AE_A4:
632 memcpy(&payload.eth.h_source, mesh_addr, ETH_ALEN);
633 break;
634 case MESH_FLAGS_AE_A5_A6:
635 memcpy(&payload.eth, mesh_addr, 2 * ETH_ALEN);
636 break;
637 default:
638 break;
639 }
640
641 pskb_pull(skb, hdrlen - sizeof(payload.eth));
642 memcpy(skb->data, &payload.eth, sizeof(payload.eth));
643
644 return 0;
645}
646EXPORT_SYMBOL(ieee80211_strip_8023_mesh_hdr);
647
648int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
649 const u8 *addr, enum nl80211_iftype iftype,
650 u8 data_offset, bool is_amsdu)
651{
652 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
653 struct {
654 u8 hdr[ETH_ALEN] __aligned(2);
655 __be16 proto;
656 } payload;
657 struct ethhdr tmp;
658 u16 hdrlen;
659
660 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
661 return -1;
662
663 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
664 if (skb->len < hdrlen)
665 return -1;
666
667 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
668 * header
669 * IEEE 802.11 address fields:
670 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
671 * 0 0 DA SA BSSID n/a
672 * 0 1 DA BSSID SA n/a
673 * 1 0 BSSID SA DA n/a
674 * 1 1 RA TA DA SA
675 */
676 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
677 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
678
679 switch (hdr->frame_control &
680 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
681 case cpu_to_le16(IEEE80211_FCTL_TODS):
682 if (unlikely(iftype != NL80211_IFTYPE_AP &&
683 iftype != NL80211_IFTYPE_AP_VLAN &&
684 iftype != NL80211_IFTYPE_P2P_GO))
685 return -1;
686 break;
687 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
688 if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT &&
689 iftype != NL80211_IFTYPE_AP_VLAN &&
690 iftype != NL80211_IFTYPE_STATION))
691 return -1;
692 break;
693 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
694 if ((iftype != NL80211_IFTYPE_STATION &&
695 iftype != NL80211_IFTYPE_P2P_CLIENT &&
696 iftype != NL80211_IFTYPE_MESH_POINT) ||
697 (is_multicast_ether_addr(tmp.h_dest) &&
698 ether_addr_equal(tmp.h_source, addr)))
699 return -1;
700 break;
701 case cpu_to_le16(0):
702 if (iftype != NL80211_IFTYPE_ADHOC &&
703 iftype != NL80211_IFTYPE_STATION &&
704 iftype != NL80211_IFTYPE_OCB &&
705 iftype != NL80211_IFTYPE_NAN_DATA)
706 return -1;
707 break;
708 }
709
710 if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT &&
711 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
712 ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) {
713 /* remove RFC1042 or Bridge-Tunnel encapsulation */
714 hdrlen += ETH_ALEN + 2;
715 skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2);
716 } else {
717 tmp.h_proto = htons(skb->len - hdrlen);
718 }
719
720 pskb_pull(skb, hdrlen);
721
722 if (!ehdr)
723 ehdr = skb_push(skb, sizeof(struct ethhdr));
724 memcpy(ehdr, &tmp, sizeof(tmp));
725
726 return 0;
727}
728EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
729
730static void
731__frame_add_frag(struct sk_buff *skb, struct page *page,
732 void *ptr, int len, int size)
733{
734 struct skb_shared_info *sh = skb_shinfo(skb);
735 int page_offset;
736
737 get_page(page);
738 page_offset = ptr - page_address(page);
739 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
740}
741
742static void
743__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
744 int offset, int len)
745{
746 struct skb_shared_info *sh = skb_shinfo(skb);
747 const skb_frag_t *frag = &sh->frags[0];
748 struct page *frag_page;
749 void *frag_ptr;
750 int frag_len, frag_size;
751 int head_size = skb->len - skb->data_len;
752 int cur_len;
753
754 frag_page = virt_to_head_page(skb->head);
755 frag_ptr = skb->data;
756 frag_size = head_size;
757
758 while (offset >= frag_size) {
759 offset -= frag_size;
760 frag_page = skb_frag_page(frag);
761 frag_ptr = skb_frag_address(frag);
762 frag_size = skb_frag_size(frag);
763 frag++;
764 }
765
766 frag_ptr += offset;
767 frag_len = frag_size - offset;
768
769 cur_len = min(len, frag_len);
770
771 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
772 len -= cur_len;
773
774 while (len > 0) {
775 frag_len = skb_frag_size(frag);
776 cur_len = min(len, frag_len);
777 __frame_add_frag(frame, skb_frag_page(frag),
778 skb_frag_address(frag), cur_len, frag_len);
779 len -= cur_len;
780 frag++;
781 }
782}
783
784static struct sk_buff *
785__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
786 int offset, int len, bool reuse_frag,
787 int min_len)
788{
789 struct sk_buff *frame;
790 int cur_len = len;
791
792 if (skb->len - offset < len)
793 return NULL;
794
795 /*
796 * When reusing fragments, copy some data to the head to simplify
797 * ethernet header handling and speed up protocol header processing
798 * in the stack later.
799 */
800 if (reuse_frag)
801 cur_len = min_t(int, len, min_len);
802
803 /*
804 * Allocate and reserve two bytes more for payload
805 * alignment since sizeof(struct ethhdr) is 14.
806 */
807 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
808 if (!frame)
809 return NULL;
810
811 frame->priority = skb->priority;
812 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
813 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
814
815 len -= cur_len;
816 if (!len)
817 return frame;
818
819 offset += cur_len;
820 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
821
822 return frame;
823}
824
825static u16
826ieee80211_amsdu_subframe_length(void *field, u8 mesh_flags, u8 hdr_type)
827{
828 __le16 *field_le = field;
829 __be16 *field_be = field;
830 u16 len;
831
832 if (hdr_type >= 2)
833 len = le16_to_cpu(*field_le);
834 else
835 len = be16_to_cpu(*field_be);
836 if (hdr_type)
837 len += __ieee80211_get_mesh_hdrlen(mesh_flags);
838
839 return len;
840}
841
842bool ieee80211_is_valid_amsdu(struct sk_buff *skb, u8 mesh_hdr)
843{
844 int offset = 0, subframe_len, padding;
845
846 for (offset = 0; offset < skb->len; offset += subframe_len + padding) {
847 int remaining = skb->len - offset;
848 struct {
849 __be16 len;
850 u8 mesh_flags;
851 } hdr;
852 u16 len;
853
854 if (sizeof(hdr) > remaining)
855 return false;
856
857 if (skb_copy_bits(skb, offset + 2 * ETH_ALEN, &hdr, sizeof(hdr)) < 0)
858 return false;
859
860 len = ieee80211_amsdu_subframe_length(&hdr.len, hdr.mesh_flags,
861 mesh_hdr);
862 subframe_len = sizeof(struct ethhdr) + len;
863 padding = (4 - subframe_len) & 0x3;
864
865 if (subframe_len > remaining)
866 return false;
867 }
868
869 return true;
870}
871EXPORT_SYMBOL(ieee80211_is_valid_amsdu);
872
873
874/*
875 * Detects if an MSDU frame was maliciously converted into an A-MSDU
876 * frame by an adversary. This is done by parsing the received frame
877 * as if it were a regular MSDU, even though the A-MSDU flag is set.
878 *
879 * For non-mesh interfaces, detection involves checking whether the
880 * payload, when interpreted as an MSDU, begins with a valid RFC1042
881 * header. This is done by comparing the A-MSDU subheader's destination
882 * address to the start of the RFC1042 header.
883 *
884 * For mesh interfaces, the MSDU includes a 6-byte Mesh Control field
885 * and an optional variable-length Mesh Address Extension field before
886 * the RFC1042 header. The position of the RFC1042 header must therefore
887 * be calculated based on the mesh header length.
888 *
889 * Since this function intentionally parses an A-MSDU frame as an MSDU,
890 * it only assumes that the A-MSDU subframe header is present, and
891 * beyond this it performs its own bounds checks under the assumption
892 * that the frame is instead parsed as a non-aggregated MSDU.
893 */
894static bool
895is_amsdu_aggregation_attack(struct ethhdr *eth, struct sk_buff *skb,
896 enum nl80211_iftype iftype)
897{
898 int offset;
899
900 /* Non-mesh case can be directly compared */
901 if (iftype != NL80211_IFTYPE_MESH_POINT)
902 return ether_addr_equal(eth->h_dest, rfc1042_header);
903
904 offset = __ieee80211_get_mesh_hdrlen(eth->h_dest[0]);
905 if (offset == 6) {
906 /* Mesh case with empty address extension field */
907 return ether_addr_equal(eth->h_source, rfc1042_header);
908 } else if (offset + ETH_ALEN <= skb->len) {
909 /* Mesh case with non-empty address extension field */
910 u8 temp[ETH_ALEN];
911
912 skb_copy_bits(skb, offset, temp, ETH_ALEN);
913 return ether_addr_equal(temp, rfc1042_header);
914 }
915
916 return false;
917}
918
919void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
920 const u8 *addr, enum nl80211_iftype iftype,
921 const unsigned int extra_headroom,
922 const u8 *check_da, const u8 *check_sa,
923 u8 mesh_control)
924{
925 unsigned int hlen = ALIGN(extra_headroom, 4);
926 struct sk_buff *frame = NULL;
927 int offset = 0;
928 struct {
929 struct ethhdr eth;
930 uint8_t flags;
931 } hdr;
932 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
933 bool reuse_skb = false;
934 bool last = false;
935 int copy_len = sizeof(hdr.eth);
936
937 if (iftype == NL80211_IFTYPE_MESH_POINT)
938 copy_len = sizeof(hdr);
939
940 while (!last) {
941 int remaining = skb->len - offset;
942 unsigned int subframe_len;
943 int len, mesh_len = 0;
944 u8 padding;
945
946 if (copy_len > remaining)
947 goto purge;
948
949 skb_copy_bits(skb, offset, &hdr, copy_len);
950 if (iftype == NL80211_IFTYPE_MESH_POINT)
951 mesh_len = __ieee80211_get_mesh_hdrlen(hdr.flags);
952 len = ieee80211_amsdu_subframe_length(&hdr.eth.h_proto, hdr.flags,
953 mesh_control);
954 subframe_len = sizeof(struct ethhdr) + len;
955 padding = (4 - subframe_len) & 0x3;
956
957 /* the last MSDU has no padding */
958 if (subframe_len > remaining)
959 goto purge;
960 /* mitigate A-MSDU aggregation injection attacks, to be
961 * checked when processing first subframe (offset == 0).
962 */
963 if (offset == 0 && is_amsdu_aggregation_attack(&hdr.eth, skb, iftype))
964 goto purge;
965
966 offset += sizeof(struct ethhdr);
967 last = remaining <= subframe_len + padding;
968
969 /* FIXME: should we really accept multicast DA? */
970 if ((check_da && !is_multicast_ether_addr(hdr.eth.h_dest) &&
971 !ether_addr_equal(check_da, hdr.eth.h_dest)) ||
972 (check_sa && !ether_addr_equal(check_sa, hdr.eth.h_source))) {
973 offset += len + padding;
974 continue;
975 }
976
977 /* reuse skb for the last subframe */
978 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
979 skb_pull(skb, offset);
980 frame = skb;
981 reuse_skb = true;
982 } else {
983 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
984 reuse_frag, 32 + mesh_len);
985 if (!frame)
986 goto purge;
987
988 offset += len + padding;
989 }
990
991 skb_reset_network_header(frame);
992 frame->dev = skb->dev;
993 frame->priority = skb->priority;
994
995 if (likely(iftype != NL80211_IFTYPE_MESH_POINT &&
996 ieee80211_get_8023_tunnel_proto(frame->data, &hdr.eth.h_proto)))
997 skb_pull(frame, ETH_ALEN + 2);
998
999 memcpy(skb_push(frame, sizeof(hdr.eth)), &hdr.eth, sizeof(hdr.eth));
1000 __skb_queue_tail(list, frame);
1001 }
1002
1003 if (!reuse_skb)
1004 dev_kfree_skb(skb);
1005
1006 return;
1007
1008 purge:
1009 __skb_queue_purge(list);
1010 dev_kfree_skb(skb);
1011}
1012EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
1013
1014/* Given a data frame determine the 802.1p/1d tag to use. */
1015unsigned int cfg80211_classify8021d(struct sk_buff *skb,
1016 struct cfg80211_qos_map *qos_map)
1017{
1018 unsigned int dscp;
1019 unsigned char vlan_priority;
1020 unsigned int ret;
1021
1022 /* skb->priority values from 256->263 are magic values to
1023 * directly indicate a specific 802.1d priority. This is used
1024 * to allow 802.1d priority to be passed directly in from VLAN
1025 * tags, etc.
1026 */
1027 if (skb->priority >= 256 && skb->priority <= 263) {
1028 ret = skb->priority - 256;
1029 goto out;
1030 }
1031
1032 if (skb_vlan_tag_present(skb)) {
1033 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
1034 >> VLAN_PRIO_SHIFT;
1035 if (vlan_priority > 0) {
1036 ret = vlan_priority;
1037 goto out;
1038 }
1039 }
1040
1041 switch (skb->protocol) {
1042 case htons(ETH_P_IP): {
1043 const struct iphdr *iph;
1044 struct iphdr _iph;
1045
1046 iph = skb_header_pointer(skb, sizeof(struct ethhdr),
1047 sizeof(*iph), &_iph);
1048 if (!iph)
1049 return 0;
1050
1051 dscp = ipv4_get_dsfield(iph) & 0xfc;
1052 break;
1053 }
1054 case htons(ETH_P_IPV6): {
1055 const struct ipv6hdr *ip6h;
1056 struct ipv6hdr _ip6h;
1057
1058 ip6h = skb_header_pointer(skb, sizeof(struct ethhdr),
1059 sizeof(*ip6h), &_ip6h);
1060 if (!ip6h)
1061 return 0;
1062
1063 dscp = ipv6_get_dsfield(ip6h) & 0xfc;
1064 break;
1065 }
1066 case htons(ETH_P_MPLS_UC):
1067 case htons(ETH_P_MPLS_MC): {
1068 struct mpls_label mpls_tmp, *mpls;
1069
1070 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
1071 sizeof(*mpls), &mpls_tmp);
1072 if (!mpls)
1073 return 0;
1074
1075 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
1076 >> MPLS_LS_TC_SHIFT;
1077 goto out;
1078 }
1079 case htons(ETH_P_80221):
1080 /* 802.21 is always network control traffic */
1081 return 7;
1082 default:
1083 return 0;
1084 }
1085
1086 if (qos_map) {
1087 unsigned int i, tmp_dscp = dscp >> 2;
1088
1089 for (i = 0; i < qos_map->num_des; i++) {
1090 if (tmp_dscp == qos_map->dscp_exception[i].dscp) {
1091 ret = qos_map->dscp_exception[i].up;
1092 goto out;
1093 }
1094 }
1095
1096 for (i = 0; i < 8; i++) {
1097 if (tmp_dscp >= qos_map->up[i].low &&
1098 tmp_dscp <= qos_map->up[i].high) {
1099 ret = i;
1100 goto out;
1101 }
1102 }
1103 }
1104
1105 /* The default mapping as defined Section 2.3 in RFC8325: The three
1106 * Most Significant Bits (MSBs) of the DSCP are used as the
1107 * corresponding L2 markings.
1108 */
1109 ret = dscp >> 5;
1110
1111 /* Handle specific DSCP values for which the default mapping (as
1112 * described above) doesn't adhere to the intended usage of the DSCP
1113 * value. See section 4 in RFC8325. Specifically, for the following
1114 * Diffserv Service Classes no update is needed:
1115 * - Standard: DF
1116 * - Low Priority Data: CS1
1117 * - Multimedia Conferencing: AF41, AF42, AF43
1118 * - Network Control Traffic: CS7
1119 * - Real-Time Interactive: CS4
1120 * - Signaling: CS5
1121 */
1122 switch (dscp >> 2) {
1123 case 10:
1124 case 12:
1125 case 14:
1126 /* High throughput data: AF11, AF12, AF13 */
1127 ret = 0;
1128 break;
1129 case 16:
1130 /* Operations, Administration, and Maintenance and Provisioning:
1131 * CS2
1132 */
1133 ret = 0;
1134 break;
1135 case 18:
1136 case 20:
1137 case 22:
1138 /* Low latency data: AF21, AF22, AF23 */
1139 ret = 3;
1140 break;
1141 case 24:
1142 /* Broadcasting video: CS3 */
1143 ret = 4;
1144 break;
1145 case 26:
1146 case 28:
1147 case 30:
1148 /* Multimedia Streaming: AF31, AF32, AF33 */
1149 ret = 4;
1150 break;
1151 case 44:
1152 /* Voice Admit: VA */
1153 ret = 6;
1154 break;
1155 case 46:
1156 /* Telephony traffic: EF */
1157 ret = 6;
1158 break;
1159 case 48:
1160 /* Network Control Traffic: CS6 */
1161 ret = 7;
1162 break;
1163 }
1164out:
1165 return array_index_nospec(ret, IEEE80211_NUM_TIDS);
1166}
1167EXPORT_SYMBOL(cfg80211_classify8021d);
1168
1169const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id)
1170{
1171 const struct cfg80211_bss_ies *ies;
1172
1173 ies = rcu_dereference(bss->ies);
1174 if (!ies)
1175 return NULL;
1176
1177 return cfg80211_find_elem(id, ies->data, ies->len);
1178}
1179EXPORT_SYMBOL(ieee80211_bss_get_elem);
1180
1181void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
1182{
1183 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1184 struct net_device *dev = wdev->netdev;
1185 int i;
1186
1187 if (!wdev->connect_keys)
1188 return;
1189
1190 for (i = 0; i < 4; i++) {
1191 if (!wdev->connect_keys->params[i].cipher)
1192 continue;
1193 if (rdev_add_key(rdev, wdev, -1, i, false, NULL,
1194 &wdev->connect_keys->params[i])) {
1195 netdev_err(dev, "failed to set key %d\n", i);
1196 continue;
1197 }
1198 if (wdev->connect_keys->def == i &&
1199 rdev_set_default_key(rdev, dev, -1, i, true, true)) {
1200 netdev_err(dev, "failed to set defkey %d\n", i);
1201 continue;
1202 }
1203 }
1204
1205 kfree_sensitive(wdev->connect_keys);
1206 wdev->connect_keys = NULL;
1207}
1208
1209void cfg80211_process_wdev_events(struct wireless_dev *wdev)
1210{
1211 struct cfg80211_event *ev;
1212 unsigned long flags;
1213
1214 spin_lock_irqsave(&wdev->event_lock, flags);
1215 while (!list_empty(&wdev->event_list)) {
1216 ev = list_first_entry(&wdev->event_list,
1217 struct cfg80211_event, list);
1218 list_del(&ev->list);
1219 spin_unlock_irqrestore(&wdev->event_lock, flags);
1220
1221 switch (ev->type) {
1222 case EVENT_CONNECT_RESULT:
1223 __cfg80211_connect_result(
1224 wdev->netdev,
1225 &ev->cr,
1226 ev->cr.status == WLAN_STATUS_SUCCESS);
1227 break;
1228 case EVENT_ROAMED:
1229 __cfg80211_roamed(wdev, &ev->rm);
1230 break;
1231 case EVENT_DISCONNECTED:
1232 __cfg80211_disconnected(wdev->netdev,
1233 ev->dc.ie, ev->dc.ie_len,
1234 ev->dc.reason,
1235 !ev->dc.locally_generated);
1236 break;
1237 case EVENT_IBSS_JOINED:
1238 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bss);
1239 break;
1240 case EVENT_STOPPED:
1241 /*
1242 * for NAN interfaces cfg80211_leave must be called but
1243 * locking here doesn't allow this.
1244 */
1245 if (WARN_ON(wdev->iftype == NL80211_IFTYPE_NAN))
1246 break;
1247
1248 cfg80211_leave_locked(wiphy_to_rdev(wdev->wiphy), wdev,
1249 ev->link_id);
1250 break;
1251 case EVENT_PORT_AUTHORIZED:
1252 __cfg80211_port_authorized(wdev, ev->pa.peer_addr,
1253 ev->pa.td_bitmap,
1254 ev->pa.td_bitmap_len);
1255 break;
1256 }
1257
1258 kfree(ev);
1259
1260 spin_lock_irqsave(&wdev->event_lock, flags);
1261 }
1262 spin_unlock_irqrestore(&wdev->event_lock, flags);
1263}
1264
1265void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
1266{
1267 struct wireless_dev *wdev;
1268
1269 lockdep_assert_held(&rdev->wiphy.mtx);
1270
1271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
1272 cfg80211_process_wdev_events(wdev);
1273}
1274
1275int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
1276 struct net_device *dev, enum nl80211_iftype ntype,
1277 struct vif_params *params)
1278{
1279 int err;
1280 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
1281
1282 lockdep_assert_held(&rdev->wiphy.mtx);
1283
1284 /* don't support changing VLANs, you just re-create them */
1285 if (otype == NL80211_IFTYPE_AP_VLAN)
1286 return -EOPNOTSUPP;
1287
1288 /*
1289 * for NAN interfaces cfg80211_leave must be called for leaving,
1290 * but locking here doesn't allow this.
1291 */
1292 if (otype == NL80211_IFTYPE_NAN)
1293 return -EOPNOTSUPP;
1294
1295 /* cannot change into P2P device or NAN */
1296 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
1297 ntype == NL80211_IFTYPE_NAN ||
1298 ntype == NL80211_IFTYPE_PD)
1299 return -EOPNOTSUPP;
1300
1301 if (!rdev->ops->change_virtual_intf ||
1302 !(rdev->wiphy.interface_modes & (1 << ntype)))
1303 return -EOPNOTSUPP;
1304
1305 if (ntype != otype) {
1306 /* if it's part of a bridge, reject changing type to station/ibss */
1307 if (netif_is_bridge_port(dev) &&
1308 (ntype == NL80211_IFTYPE_ADHOC ||
1309 ntype == NL80211_IFTYPE_STATION ||
1310 ntype == NL80211_IFTYPE_P2P_CLIENT))
1311 return -EBUSY;
1312
1313 dev->ieee80211_ptr->use_4addr = false;
1314 rdev_set_qos_map(rdev, dev, NULL);
1315
1316 cfg80211_leave_locked(rdev, dev->ieee80211_ptr, -1);
1317
1318 cfg80211_process_rdev_events(rdev);
1319 cfg80211_mlme_purge_registrations(dev->ieee80211_ptr);
1320
1321 memset(&dev->ieee80211_ptr->u, 0,
1322 sizeof(dev->ieee80211_ptr->u));
1323 memset(&dev->ieee80211_ptr->links, 0,
1324 sizeof(dev->ieee80211_ptr->links));
1325 }
1326
1327 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
1328
1329 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1330
1331 if (!err && params && params->use_4addr != -1)
1332 dev->ieee80211_ptr->use_4addr = params->use_4addr;
1333
1334 if (!err) {
1335 dev->priv_flags &= ~IFF_DONT_BRIDGE;
1336 switch (ntype) {
1337 case NL80211_IFTYPE_STATION:
1338 if (dev->ieee80211_ptr->use_4addr)
1339 break;
1340 fallthrough;
1341 case NL80211_IFTYPE_OCB:
1342 case NL80211_IFTYPE_P2P_CLIENT:
1343 case NL80211_IFTYPE_ADHOC:
1344 case NL80211_IFTYPE_NAN_DATA:
1345 dev->priv_flags |= IFF_DONT_BRIDGE;
1346 break;
1347 case NL80211_IFTYPE_P2P_GO:
1348 case NL80211_IFTYPE_AP:
1349 case NL80211_IFTYPE_AP_VLAN:
1350 case NL80211_IFTYPE_MESH_POINT:
1351 /* bridging OK */
1352 break;
1353 case NL80211_IFTYPE_MONITOR:
1354 /* monitor can't bridge anyway */
1355 break;
1356 case NL80211_IFTYPE_UNSPECIFIED:
1357 case NUM_NL80211_IFTYPES:
1358 /* not happening */
1359 break;
1360 case NL80211_IFTYPE_P2P_DEVICE:
1361 case NL80211_IFTYPE_WDS:
1362 case NL80211_IFTYPE_NAN:
1363 case NL80211_IFTYPE_PD:
1364 WARN_ON(1);
1365 break;
1366 }
1367 }
1368
1369 if (!err && ntype != otype && netif_running(dev)) {
1370 cfg80211_update_iface_num(rdev, ntype, 1);
1371 cfg80211_update_iface_num(rdev, otype, -1);
1372 }
1373
1374 return err;
1375}
1376
1377static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
1378{
1379 int modulation, streams, bitrate;
1380
1381 /* the formula below does only work for MCS values smaller than 32 */
1382 if (WARN_ON_ONCE(rate->mcs >= 32))
1383 return 0;
1384
1385 modulation = rate->mcs & 7;
1386 streams = (rate->mcs >> 3) + 1;
1387
1388 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1389
1390 if (modulation < 4)
1391 bitrate *= (modulation + 1);
1392 else if (modulation == 4)
1393 bitrate *= (modulation + 2);
1394 else
1395 bitrate *= (modulation + 3);
1396
1397 bitrate *= streams;
1398
1399 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1400 bitrate = (bitrate / 9) * 10;
1401
1402 /* do NOT round down here */
1403 return (bitrate + 50000) / 100000;
1404}
1405
1406static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate)
1407{
1408 static const u32 __mcs2bitrate[] = {
1409 /* control PHY */
1410 [0] = 275,
1411 /* SC PHY */
1412 [1] = 3850,
1413 [2] = 7700,
1414 [3] = 9625,
1415 [4] = 11550,
1416 [5] = 12512, /* 1251.25 mbps */
1417 [6] = 15400,
1418 [7] = 19250,
1419 [8] = 23100,
1420 [9] = 25025,
1421 [10] = 30800,
1422 [11] = 38500,
1423 [12] = 46200,
1424 /* OFDM PHY */
1425 [13] = 6930,
1426 [14] = 8662, /* 866.25 mbps */
1427 [15] = 13860,
1428 [16] = 17325,
1429 [17] = 20790,
1430 [18] = 27720,
1431 [19] = 34650,
1432 [20] = 41580,
1433 [21] = 45045,
1434 [22] = 51975,
1435 [23] = 62370,
1436 [24] = 67568, /* 6756.75 mbps */
1437 /* LP-SC PHY */
1438 [25] = 6260,
1439 [26] = 8340,
1440 [27] = 11120,
1441 [28] = 12510,
1442 [29] = 16680,
1443 [30] = 22240,
1444 [31] = 25030,
1445 };
1446
1447 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1448 return 0;
1449
1450 return __mcs2bitrate[rate->mcs];
1451}
1452
1453static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate)
1454{
1455 static const u32 __mcs2bitrate[] = {
1456 [6 - 6] = 26950, /* MCS 9.1 : 2695.0 mbps */
1457 [7 - 6] = 50050, /* MCS 12.1 */
1458 [8 - 6] = 53900,
1459 [9 - 6] = 57750,
1460 [10 - 6] = 63900,
1461 [11 - 6] = 75075,
1462 [12 - 6] = 80850,
1463 };
1464
1465 /* Extended SC MCS not defined for base MCS below 6 or above 12 */
1466 if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12))
1467 return 0;
1468
1469 return __mcs2bitrate[rate->mcs - 6];
1470}
1471
1472static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate)
1473{
1474 static const u32 __mcs2bitrate[] = {
1475 /* control PHY */
1476 [0] = 275,
1477 /* SC PHY */
1478 [1] = 3850,
1479 [2] = 7700,
1480 [3] = 9625,
1481 [4] = 11550,
1482 [5] = 12512, /* 1251.25 mbps */
1483 [6] = 13475,
1484 [7] = 15400,
1485 [8] = 19250,
1486 [9] = 23100,
1487 [10] = 25025,
1488 [11] = 26950,
1489 [12] = 30800,
1490 [13] = 38500,
1491 [14] = 46200,
1492 [15] = 50050,
1493 [16] = 53900,
1494 [17] = 57750,
1495 [18] = 69300,
1496 [19] = 75075,
1497 [20] = 80850,
1498 };
1499
1500 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1501 return 0;
1502
1503 return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch;
1504}
1505
1506static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1507{
1508 static const u32 base[4][12] = {
1509 { 6500000,
1510 13000000,
1511 19500000,
1512 26000000,
1513 39000000,
1514 52000000,
1515 58500000,
1516 65000000,
1517 78000000,
1518 /* not in the spec, but some devices use this: */
1519 86700000,
1520 97500000,
1521 108300000,
1522 },
1523 { 13500000,
1524 27000000,
1525 40500000,
1526 54000000,
1527 81000000,
1528 108000000,
1529 121500000,
1530 135000000,
1531 162000000,
1532 180000000,
1533 202500000,
1534 225000000,
1535 },
1536 { 29300000,
1537 58500000,
1538 87800000,
1539 117000000,
1540 175500000,
1541 234000000,
1542 263300000,
1543 292500000,
1544 351000000,
1545 390000000,
1546 438800000,
1547 487500000,
1548 },
1549 { 58500000,
1550 117000000,
1551 175500000,
1552 234000000,
1553 351000000,
1554 468000000,
1555 526500000,
1556 585000000,
1557 702000000,
1558 780000000,
1559 877500000,
1560 975000000,
1561 },
1562 };
1563 u32 bitrate;
1564 int idx;
1565
1566 if (rate->mcs > 11)
1567 goto warn;
1568
1569 switch (rate->bw) {
1570 case RATE_INFO_BW_160:
1571 idx = 3;
1572 break;
1573 case RATE_INFO_BW_80:
1574 idx = 2;
1575 break;
1576 case RATE_INFO_BW_40:
1577 idx = 1;
1578 break;
1579 case RATE_INFO_BW_5:
1580 case RATE_INFO_BW_10:
1581 default:
1582 goto warn;
1583 case RATE_INFO_BW_20:
1584 idx = 0;
1585 }
1586
1587 bitrate = base[idx][rate->mcs];
1588 bitrate *= rate->nss;
1589
1590 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1591 bitrate = (bitrate / 9) * 10;
1592
1593 /* do NOT round down here */
1594 return (bitrate + 50000) / 100000;
1595 warn:
1596 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1597 rate->bw, rate->mcs, rate->nss);
1598 return 0;
1599}
1600
1601static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
1602{
1603#define SCALE 6144
1604 u32 mcs_divisors[14] = {
1605 102399, /* 16.666666... */
1606 51201, /* 8.333333... */
1607 34134, /* 5.555555... */
1608 25599, /* 4.166666... */
1609 17067, /* 2.777777... */
1610 12801, /* 2.083333... */
1611 11377, /* 1.851725... */
1612 10239, /* 1.666666... */
1613 8532, /* 1.388888... */
1614 7680, /* 1.250000... */
1615 6828, /* 1.111111... */
1616 6144, /* 1.000000... */
1617 5690, /* 0.926106... */
1618 5120, /* 0.833333... */
1619 };
1620 u32 rates_160M[3] = { 960777777, 907400000, 816666666 };
1621 u32 rates_996[3] = { 480388888, 453700000, 408333333 };
1622 u32 rates_484[3] = { 229411111, 216666666, 195000000 };
1623 u32 rates_242[3] = { 114711111, 108333333, 97500000 };
1624 u32 rates_106[3] = { 40000000, 37777777, 34000000 };
1625 u32 rates_52[3] = { 18820000, 17777777, 16000000 };
1626 u32 rates_26[3] = { 9411111, 8888888, 8000000 };
1627 u64 tmp;
1628 u32 result;
1629
1630 if (WARN_ON_ONCE(rate->mcs > 13))
1631 return 0;
1632
1633 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2))
1634 return 0;
1635 if (WARN_ON_ONCE(rate->he_ru_alloc >
1636 NL80211_RATE_INFO_HE_RU_ALLOC_2x996))
1637 return 0;
1638 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
1639 return 0;
1640
1641 if (rate->bw == RATE_INFO_BW_160 ||
1642 (rate->bw == RATE_INFO_BW_HE_RU &&
1643 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_2x996))
1644 result = rates_160M[rate->he_gi];
1645 else if (rate->bw == RATE_INFO_BW_80 ||
1646 (rate->bw == RATE_INFO_BW_HE_RU &&
1647 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996))
1648 result = rates_996[rate->he_gi];
1649 else if (rate->bw == RATE_INFO_BW_40 ||
1650 (rate->bw == RATE_INFO_BW_HE_RU &&
1651 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484))
1652 result = rates_484[rate->he_gi];
1653 else if (rate->bw == RATE_INFO_BW_20 ||
1654 (rate->bw == RATE_INFO_BW_HE_RU &&
1655 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242))
1656 result = rates_242[rate->he_gi];
1657 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1658 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106)
1659 result = rates_106[rate->he_gi];
1660 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1661 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52)
1662 result = rates_52[rate->he_gi];
1663 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1664 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26)
1665 result = rates_26[rate->he_gi];
1666 else {
1667 WARN(1, "invalid HE MCS: bw:%d, ru:%d\n",
1668 rate->bw, rate->he_ru_alloc);
1669 return 0;
1670 }
1671
1672 /* now scale to the appropriate MCS */
1673 tmp = result;
1674 tmp *= SCALE;
1675 do_div(tmp, mcs_divisors[rate->mcs]);
1676
1677 /* and take NSS, DCM into account */
1678 tmp *= rate->nss;
1679 do_div(tmp, 8);
1680 if (rate->he_dcm)
1681 do_div(tmp, 2);
1682
1683 result = tmp;
1684
1685 return result / 10000;
1686}
1687
1688static u32 _cfg80211_calculate_bitrate_eht_uhr(struct rate_info *rate)
1689{
1690#define SCALE 6144
1691 static const u32 mcs_divisors[] = {
1692 [ 0] = 102399, /* 16.666666... */
1693 [ 1] = 51201, /* 8.333333... */
1694 [ 2] = 34134, /* 5.555555... */
1695 [ 3] = 25599, /* 4.166666... */
1696 [ 4] = 17067, /* 2.777777... */
1697 [ 5] = 12801, /* 2.083333... */
1698 [ 6] = 11377, /* 1.851725... */
1699 [ 7] = 10239, /* 1.666666... */
1700 [ 8] = 8532, /* 1.388888... */
1701 [ 9] = 7680, /* 1.250000... */
1702 [10] = 6828, /* 1.111111... */
1703 [11] = 6144, /* 1.000000... */
1704 [12] = 5690, /* 0.926106... */
1705 [13] = 5120, /* 0.833333... */
1706 [14] = 409600, /* 66.666666... */
1707 [15] = 204800, /* 33.333333... */
1708 [17] = 38400, /* 6.250180... */
1709 [19] = 19200, /* 3.125090... */
1710 [20] = 15360, /* 2.500000... */
1711 [23] = 9600, /* 1.562545... */
1712 };
1713 static const u32 rates_996[3] = { 480388888, 453700000, 408333333 };
1714 static const u32 rates_484[3] = { 229411111, 216666666, 195000000 };
1715 static const u32 rates_242[3] = { 114711111, 108333333, 97500000 };
1716 static const u32 rates_106[3] = { 40000000, 37777777, 34000000 };
1717 static const u32 rates_52[3] = { 18820000, 17777777, 16000000 };
1718 static const u32 rates_26[3] = { 9411111, 8888888, 8000000 };
1719 u64 tmp;
1720 u32 result;
1721
1722 if (WARN_ON_ONCE(rate->eht_gi > NL80211_RATE_INFO_EHT_GI_3_2))
1723 return 0;
1724 if (WARN_ON_ONCE(rate->eht_ru_alloc >
1725 NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
1726 return 0;
1727 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
1728 return 0;
1729
1730 /* Bandwidth checks for MCS 14 */
1731 if (rate->mcs == 14) {
1732 if ((rate->bw != RATE_INFO_BW_EHT_RU &&
1733 rate->bw != RATE_INFO_BW_80 &&
1734 rate->bw != RATE_INFO_BW_160 &&
1735 rate->bw != RATE_INFO_BW_320) ||
1736 (rate->bw == RATE_INFO_BW_EHT_RU &&
1737 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_996 &&
1738 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_2x996 &&
1739 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) {
1740 WARN(1, "invalid EHT BW for MCS 14: bw:%d, ru:%d\n",
1741 rate->bw, rate->eht_ru_alloc);
1742 return 0;
1743 }
1744 }
1745
1746 if (rate->bw == RATE_INFO_BW_320 ||
1747 (rate->bw == RATE_INFO_BW_EHT_RU &&
1748 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
1749 result = 4 * rates_996[rate->eht_gi];
1750 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1751 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996P484)
1752 result = 3 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
1753 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1754 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996)
1755 result = 3 * rates_996[rate->eht_gi];
1756 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1757 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996P484)
1758 result = 2 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
1759 else if (rate->bw == RATE_INFO_BW_160 ||
1760 (rate->bw == RATE_INFO_BW_EHT_RU &&
1761 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996))
1762 result = 2 * rates_996[rate->eht_gi];
1763 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1764 rate->eht_ru_alloc ==
1765 NL80211_RATE_INFO_EHT_RU_ALLOC_996P484P242)
1766 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi]
1767 + rates_242[rate->eht_gi];
1768 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1769 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996P484)
1770 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
1771 else if (rate->bw == RATE_INFO_BW_80 ||
1772 (rate->bw == RATE_INFO_BW_EHT_RU &&
1773 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996))
1774 result = rates_996[rate->eht_gi];
1775 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1776 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484P242)
1777 result = rates_484[rate->eht_gi] + rates_242[rate->eht_gi];
1778 else if (rate->bw == RATE_INFO_BW_40 ||
1779 (rate->bw == RATE_INFO_BW_EHT_RU &&
1780 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484))
1781 result = rates_484[rate->eht_gi];
1782 else if (rate->bw == RATE_INFO_BW_20 ||
1783 (rate->bw == RATE_INFO_BW_EHT_RU &&
1784 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_242))
1785 result = rates_242[rate->eht_gi];
1786 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1787 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106P26)
1788 result = rates_106[rate->eht_gi] + rates_26[rate->eht_gi];
1789 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1790 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106)
1791 result = rates_106[rate->eht_gi];
1792 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1793 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52P26)
1794 result = rates_52[rate->eht_gi] + rates_26[rate->eht_gi];
1795 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1796 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52)
1797 result = rates_52[rate->eht_gi];
1798 else if (rate->bw == RATE_INFO_BW_EHT_RU &&
1799 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_26)
1800 result = rates_26[rate->eht_gi];
1801 else {
1802 WARN(1, "invalid EHT or UHR MCS: bw:%d, ru:%d\n",
1803 rate->bw, rate->eht_ru_alloc);
1804 return 0;
1805 }
1806
1807 /* now scale to the appropriate MCS */
1808 tmp = result;
1809 tmp *= SCALE;
1810 do_div(tmp, mcs_divisors[rate->mcs]);
1811
1812 /* and take NSS */
1813 tmp *= rate->nss;
1814 do_div(tmp, 8);
1815
1816 /* and handle interference mitigation - 0.9x */
1817 if (rate->flags & RATE_INFO_FLAGS_UHR_IM) {
1818 if (WARN(rate->nss != 1 || rate->mcs == 15,
1819 "invalid NSS or MCS for UHR IM\n"))
1820 return 0;
1821 tmp *= 9000;
1822 do_div(tmp, 10000);
1823 }
1824
1825 result = tmp;
1826
1827 return result / 10000;
1828}
1829
1830static u32 cfg80211_calculate_bitrate_eht(struct rate_info *rate)
1831{
1832 if (WARN_ONCE(rate->mcs > 15, "bad EHT MCS %d\n", rate->mcs))
1833 return 0;
1834
1835 if (WARN_ONCE(rate->flags & (RATE_INFO_FLAGS_UHR_ELR_MCS |
1836 RATE_INFO_FLAGS_UHR_IM),
1837 "bad EHT MCS flags 0x%x\n", rate->flags))
1838 return 0;
1839
1840 return _cfg80211_calculate_bitrate_eht_uhr(rate);
1841}
1842
1843static u32 cfg80211_calculate_bitrate_uhr(struct rate_info *rate)
1844{
1845 if (rate->flags & RATE_INFO_FLAGS_UHR_ELR_MCS) {
1846 WARN_ONCE(rate->eht_gi != NL80211_RATE_INFO_EHT_GI_1_6,
1847 "bad UHR ELR guard interval %d\n",
1848 rate->eht_gi);
1849 WARN_ONCE(rate->mcs > 1, "bad UHR ELR MCS %d\n", rate->mcs);
1850 WARN_ONCE(rate->nss != 1, "bad UHR ELR NSS %d\n", rate->nss);
1851 WARN_ONCE(rate->bw != RATE_INFO_BW_20,
1852 "bad UHR ELR bandwidth %d\n",
1853 rate->bw);
1854 WARN_ONCE(rate->flags & RATE_INFO_FLAGS_UHR_IM,
1855 "bad UHR MCS flags 0x%x\n", rate->flags);
1856 if (rate->mcs == 0)
1857 return 17;
1858 return 33;
1859 }
1860
1861 switch (rate->mcs) {
1862 case 0 ... 15:
1863 case 17:
1864 case 19:
1865 case 20:
1866 case 23:
1867 return _cfg80211_calculate_bitrate_eht_uhr(rate);
1868 }
1869
1870 WARN_ONCE(1, "bad UHR MCS %d\n", rate->mcs);
1871 return 0;
1872}
1873
1874static u32 cfg80211_calculate_bitrate_s1g(struct rate_info *rate)
1875{
1876 /* For 1, 2, 4, 8 and 16 MHz channels */
1877 static const u32 base[5][11] = {
1878 { 300000,
1879 600000,
1880 900000,
1881 1200000,
1882 1800000,
1883 2400000,
1884 2700000,
1885 3000000,
1886 3600000,
1887 4000000,
1888 /* MCS 10 supported in 1 MHz only */
1889 150000,
1890 },
1891 { 650000,
1892 1300000,
1893 1950000,
1894 2600000,
1895 3900000,
1896 5200000,
1897 5850000,
1898 6500000,
1899 7800000,
1900 /* MCS 9 not valid */
1901 },
1902 { 1350000,
1903 2700000,
1904 4050000,
1905 5400000,
1906 8100000,
1907 10800000,
1908 12150000,
1909 13500000,
1910 16200000,
1911 18000000,
1912 },
1913 { 2925000,
1914 5850000,
1915 8775000,
1916 11700000,
1917 17550000,
1918 23400000,
1919 26325000,
1920 29250000,
1921 35100000,
1922 39000000,
1923 },
1924 { 8580000,
1925 11700000,
1926 17550000,
1927 23400000,
1928 35100000,
1929 46800000,
1930 52650000,
1931 58500000,
1932 70200000,
1933 78000000,
1934 },
1935 };
1936 u32 bitrate;
1937 /* default is 1 MHz index */
1938 int idx = 0;
1939
1940 if (rate->mcs >= 11)
1941 goto warn;
1942
1943 switch (rate->bw) {
1944 case RATE_INFO_BW_16:
1945 idx = 4;
1946 break;
1947 case RATE_INFO_BW_8:
1948 idx = 3;
1949 break;
1950 case RATE_INFO_BW_4:
1951 idx = 2;
1952 break;
1953 case RATE_INFO_BW_2:
1954 idx = 1;
1955 break;
1956 case RATE_INFO_BW_1:
1957 idx = 0;
1958 break;
1959 case RATE_INFO_BW_5:
1960 case RATE_INFO_BW_10:
1961 case RATE_INFO_BW_20:
1962 case RATE_INFO_BW_40:
1963 case RATE_INFO_BW_80:
1964 case RATE_INFO_BW_160:
1965 default:
1966 goto warn;
1967 }
1968
1969 bitrate = base[idx][rate->mcs];
1970 bitrate *= rate->nss;
1971
1972 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1973 bitrate = (bitrate / 9) * 10;
1974 /* do NOT round down here */
1975 return (bitrate + 50000) / 100000;
1976warn:
1977 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1978 rate->bw, rate->mcs, rate->nss);
1979 return 0;
1980}
1981
1982u32 cfg80211_calculate_bitrate(struct rate_info *rate)
1983{
1984 if (rate->flags & RATE_INFO_FLAGS_MCS)
1985 return cfg80211_calculate_bitrate_ht(rate);
1986 if (rate->flags & RATE_INFO_FLAGS_DMG)
1987 return cfg80211_calculate_bitrate_dmg(rate);
1988 if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG)
1989 return cfg80211_calculate_bitrate_extended_sc_dmg(rate);
1990 if (rate->flags & RATE_INFO_FLAGS_EDMG)
1991 return cfg80211_calculate_bitrate_edmg(rate);
1992 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1993 return cfg80211_calculate_bitrate_vht(rate);
1994 if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
1995 return cfg80211_calculate_bitrate_he(rate);
1996 if (rate->flags & RATE_INFO_FLAGS_EHT_MCS)
1997 return cfg80211_calculate_bitrate_eht(rate);
1998 if (rate->flags & RATE_INFO_FLAGS_UHR_MCS)
1999 return cfg80211_calculate_bitrate_uhr(rate);
2000 if (rate->flags & RATE_INFO_FLAGS_S1G_MCS)
2001 return cfg80211_calculate_bitrate_s1g(rate);
2002
2003 return rate->legacy;
2004}
2005EXPORT_SYMBOL(cfg80211_calculate_bitrate);
2006
2007int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
2008 enum ieee80211_p2p_attr_id attr,
2009 u8 *buf, unsigned int bufsize)
2010{
2011 u8 *out = buf;
2012 u16 attr_remaining = 0;
2013 bool desired_attr = false;
2014 u16 desired_len = 0;
2015
2016 while (len > 0) {
2017 unsigned int iedatalen;
2018 unsigned int copy;
2019 const u8 *iedata;
2020
2021 if (len < 2)
2022 return -EILSEQ;
2023 iedatalen = ies[1];
2024 if (iedatalen + 2 > len)
2025 return -EILSEQ;
2026
2027 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
2028 goto cont;
2029
2030 if (iedatalen < 4)
2031 goto cont;
2032
2033 iedata = ies + 2;
2034
2035 /* check WFA OUI, P2P subtype */
2036 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
2037 iedata[2] != 0x9a || iedata[3] != 0x09)
2038 goto cont;
2039
2040 iedatalen -= 4;
2041 iedata += 4;
2042
2043 /* check attribute continuation into this IE */
2044 copy = min_t(unsigned int, attr_remaining, iedatalen);
2045 if (copy && desired_attr) {
2046 desired_len += copy;
2047 if (out) {
2048 memcpy(out, iedata, min(bufsize, copy));
2049 out += min(bufsize, copy);
2050 bufsize -= min(bufsize, copy);
2051 }
2052
2053
2054 if (copy == attr_remaining)
2055 return desired_len;
2056 }
2057
2058 attr_remaining -= copy;
2059 if (attr_remaining)
2060 goto cont;
2061
2062 iedatalen -= copy;
2063 iedata += copy;
2064
2065 while (iedatalen > 0) {
2066 u16 attr_len;
2067
2068 /* P2P attribute ID & size must fit */
2069 if (iedatalen < 3)
2070 return -EILSEQ;
2071 desired_attr = iedata[0] == attr;
2072 attr_len = get_unaligned_le16(iedata + 1);
2073 iedatalen -= 3;
2074 iedata += 3;
2075
2076 copy = min_t(unsigned int, attr_len, iedatalen);
2077
2078 if (desired_attr) {
2079 desired_len += copy;
2080 if (out) {
2081 memcpy(out, iedata, min(bufsize, copy));
2082 out += min(bufsize, copy);
2083 bufsize -= min(bufsize, copy);
2084 }
2085
2086 if (copy == attr_len)
2087 return desired_len;
2088 }
2089
2090 iedata += copy;
2091 iedatalen -= copy;
2092 attr_remaining = attr_len - copy;
2093 }
2094
2095 cont:
2096 len -= ies[1] + 2;
2097 ies += ies[1] + 2;
2098 }
2099
2100 if (attr_remaining && desired_attr)
2101 return -EILSEQ;
2102
2103 return -ENOENT;
2104}
2105EXPORT_SYMBOL(cfg80211_get_p2p_attr);
2106
2107static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext)
2108{
2109 int i;
2110
2111 /* Make sure array values are legal */
2112 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION))
2113 return false;
2114
2115 i = 0;
2116 while (i < n_ids) {
2117 if (ids[i] == WLAN_EID_EXTENSION) {
2118 if (id_ext && (ids[i + 1] == id))
2119 return true;
2120
2121 i += 2;
2122 continue;
2123 }
2124
2125 if (ids[i] == id && !id_ext)
2126 return true;
2127
2128 i++;
2129 }
2130 return false;
2131}
2132
2133static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
2134{
2135 /* we assume a validly formed IEs buffer */
2136 u8 len = ies[pos + 1];
2137
2138 pos += 2 + len;
2139
2140 /* the IE itself must have 255 bytes for fragments to follow */
2141 if (len < 255)
2142 return pos;
2143
2144 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
2145 len = ies[pos + 1];
2146 pos += 2 + len;
2147 }
2148
2149 return pos;
2150}
2151
2152size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2153 const u8 *ids, int n_ids,
2154 const u8 *after_ric, int n_after_ric,
2155 size_t offset)
2156{
2157 size_t pos = offset;
2158
2159 while (pos < ielen) {
2160 u8 ext = 0;
2161
2162 if (ies[pos] == WLAN_EID_EXTENSION)
2163 ext = 2;
2164 if ((pos + ext) >= ielen)
2165 break;
2166
2167 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext],
2168 ies[pos] == WLAN_EID_EXTENSION))
2169 break;
2170
2171 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2172 pos = skip_ie(ies, ielen, pos);
2173
2174 while (pos < ielen) {
2175 if (ies[pos] == WLAN_EID_EXTENSION)
2176 ext = 2;
2177 else
2178 ext = 0;
2179
2180 if ((pos + ext) >= ielen)
2181 break;
2182
2183 if (!ieee80211_id_in_list(after_ric,
2184 n_after_ric,
2185 ies[pos + ext],
2186 ext == 2))
2187 pos = skip_ie(ies, ielen, pos);
2188 else
2189 break;
2190 }
2191 } else {
2192 pos = skip_ie(ies, ielen, pos);
2193 }
2194 }
2195
2196 return pos;
2197}
2198EXPORT_SYMBOL(ieee80211_ie_split_ric);
2199
2200void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id)
2201{
2202 unsigned int elem_len;
2203
2204 if (!len_pos)
2205 return;
2206
2207 elem_len = skb->data + skb->len - len_pos - 1;
2208
2209 while (elem_len > 255) {
2210 /* this one is 255 */
2211 *len_pos = 255;
2212 /* remaining data gets smaller */
2213 elem_len -= 255;
2214 /* make space for the fragment ID/len in SKB */
2215 skb_put(skb, 2);
2216 /* shift back the remaining data to place fragment ID/len */
2217 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
2218 /* place the fragment ID */
2219 len_pos += 255 + 1;
2220 *len_pos = frag_id;
2221 /* and point to fragment length to update later */
2222 len_pos++;
2223 }
2224
2225 *len_pos = elem_len;
2226}
2227EXPORT_SYMBOL(ieee80211_fragment_element);
2228
2229bool ieee80211_operating_class_to_band(u8 operating_class,
2230 enum nl80211_band *band)
2231{
2232 switch (operating_class) {
2233 case 112:
2234 case 115 ... 127:
2235 case 128 ... 130:
2236 *band = NL80211_BAND_5GHZ;
2237 return true;
2238 case 131 ... 135:
2239 case 137:
2240 *band = NL80211_BAND_6GHZ;
2241 return true;
2242 case 81:
2243 case 82:
2244 case 83:
2245 case 84:
2246 *band = NL80211_BAND_2GHZ;
2247 return true;
2248 case 180:
2249 *band = NL80211_BAND_60GHZ;
2250 return true;
2251 }
2252
2253 return false;
2254}
2255EXPORT_SYMBOL(ieee80211_operating_class_to_band);
2256
2257bool ieee80211_operating_class_to_chandef(u8 operating_class,
2258 struct ieee80211_channel *chan,
2259 struct cfg80211_chan_def *chandef)
2260{
2261 u32 control_freq, offset = 0;
2262 enum nl80211_band band;
2263
2264 if (!ieee80211_operating_class_to_band(operating_class, &band) ||
2265 !chan || band != chan->band)
2266 return false;
2267
2268 control_freq = chan->center_freq;
2269 chandef->chan = chan;
2270
2271 if (control_freq >= 5955)
2272 offset = control_freq - 5955;
2273 else if (control_freq >= 5745)
2274 offset = control_freq - 5745;
2275 else if (control_freq >= 5180)
2276 offset = control_freq - 5180;
2277 offset /= 20;
2278
2279 switch (operating_class) {
2280 case 81: /* 2 GHz band; 20 MHz; channels 1..13 */
2281 case 82: /* 2 GHz band; 20 MHz; channel 14 */
2282 case 115: /* 5 GHz band; 20 MHz; channels 36,40,44,48 */
2283 case 118: /* 5 GHz band; 20 MHz; channels 52,56,60,64 */
2284 case 121: /* 5 GHz band; 20 MHz; channels 100..144 */
2285 case 124: /* 5 GHz band; 20 MHz; channels 149,153,157,161 */
2286 case 125: /* 5 GHz band; 20 MHz; channels 149..177 */
2287 case 131: /* 6 GHz band; 20 MHz; channels 1..233*/
2288 case 136: /* 6 GHz band; 20 MHz; channel 2 */
2289 chandef->center_freq1 = control_freq;
2290 chandef->width = NL80211_CHAN_WIDTH_20;
2291 return true;
2292 case 83: /* 2 GHz band; 40 MHz; channels 1..9 */
2293 case 116: /* 5 GHz band; 40 MHz; channels 36,44 */
2294 case 119: /* 5 GHz band; 40 MHz; channels 52,60 */
2295 case 122: /* 5 GHz band; 40 MHz; channels 100,108,116,124,132,140 */
2296 case 126: /* 5 GHz band; 40 MHz; channels 149,157,165,173 */
2297 chandef->center_freq1 = control_freq + 10;
2298 chandef->width = NL80211_CHAN_WIDTH_40;
2299 return true;
2300 case 84: /* 2 GHz band; 40 MHz; channels 5..13 */
2301 case 117: /* 5 GHz band; 40 MHz; channels 40,48 */
2302 case 120: /* 5 GHz band; 40 MHz; channels 56,64 */
2303 case 123: /* 5 GHz band; 40 MHz; channels 104,112,120,128,136,144 */
2304 case 127: /* 5 GHz band; 40 MHz; channels 153,161,169,177 */
2305 chandef->center_freq1 = control_freq - 10;
2306 chandef->width = NL80211_CHAN_WIDTH_40;
2307 return true;
2308 case 132: /* 6 GHz band; 40 MHz; channels 1,5,..,229*/
2309 chandef->center_freq1 = control_freq + 10 - (offset & 1) * 20;
2310 chandef->width = NL80211_CHAN_WIDTH_40;
2311 return true;
2312 case 128: /* 5 GHz band; 80 MHz; channels 36..64,100..144,149..177 */
2313 case 133: /* 6 GHz band; 80 MHz; channels 1,5,..,229 */
2314 chandef->center_freq1 = control_freq + 30 - (offset & 3) * 20;
2315 chandef->width = NL80211_CHAN_WIDTH_80;
2316 return true;
2317 case 129: /* 5 GHz band; 160 MHz; channels 36..64,100..144,149..177 */
2318 case 134: /* 6 GHz band; 160 MHz; channels 1,5,..,229 */
2319 chandef->center_freq1 = control_freq + 70 - (offset & 7) * 20;
2320 chandef->width = NL80211_CHAN_WIDTH_160;
2321 return true;
2322 case 130: /* 5 GHz band; 80+80 MHz; channels 36..64,100..144,149..177 */
2323 case 135: /* 6 GHz band; 80+80 MHz; channels 1,5,..,229 */
2324 /* The center_freq2 of 80+80 MHz is unknown */
2325 case 137: /* 6 GHz band; 320 MHz; channels 1,5,..,229 */
2326 /* 320-1 or 320-2 channelization is unknown */
2327 default:
2328 return false;
2329 }
2330}
2331EXPORT_SYMBOL(ieee80211_operating_class_to_chandef);
2332
2333bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
2334 u8 *op_class)
2335{
2336 u8 vht_opclass;
2337 u32 freq = chandef->center_freq1;
2338
2339 if (freq >= 2412 && freq <= 2472) {
2340 if (chandef->width > NL80211_CHAN_WIDTH_40)
2341 return false;
2342
2343 /* 2.407 GHz, channels 1..13 */
2344 if (chandef->width == NL80211_CHAN_WIDTH_40) {
2345 if (freq > chandef->chan->center_freq)
2346 *op_class = 83; /* HT40+ */
2347 else
2348 *op_class = 84; /* HT40- */
2349 } else {
2350 *op_class = 81;
2351 }
2352
2353 return true;
2354 }
2355
2356 if (freq == 2484) {
2357 /* channel 14 is only for IEEE 802.11b */
2358 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
2359 return false;
2360
2361 *op_class = 82; /* channel 14 */
2362 return true;
2363 }
2364
2365 switch (chandef->width) {
2366 case NL80211_CHAN_WIDTH_80:
2367 vht_opclass = 128;
2368 break;
2369 case NL80211_CHAN_WIDTH_160:
2370 vht_opclass = 129;
2371 break;
2372 case NL80211_CHAN_WIDTH_80P80:
2373 vht_opclass = 130;
2374 break;
2375 default:
2376 vht_opclass = 0;
2377 break;
2378 }
2379
2380 /* 5 GHz, channels 36..48 */
2381 if (freq >= 5180 && freq <= 5240) {
2382 if (vht_opclass) {
2383 *op_class = vht_opclass;
2384 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
2385 if (freq > chandef->chan->center_freq)
2386 *op_class = 116;
2387 else
2388 *op_class = 117;
2389 } else {
2390 *op_class = 115;
2391 }
2392
2393 return true;
2394 }
2395
2396 /* 5 GHz, channels 52..64 */
2397 if (freq >= 5260 && freq <= 5320) {
2398 if (vht_opclass) {
2399 *op_class = vht_opclass;
2400 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
2401 if (freq > chandef->chan->center_freq)
2402 *op_class = 119;
2403 else
2404 *op_class = 120;
2405 } else {
2406 *op_class = 118;
2407 }
2408
2409 return true;
2410 }
2411
2412 /* 5 GHz, channels 100..144 */
2413 if (freq >= 5500 && freq <= 5720) {
2414 if (vht_opclass) {
2415 *op_class = vht_opclass;
2416 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
2417 if (freq > chandef->chan->center_freq)
2418 *op_class = 122;
2419 else
2420 *op_class = 123;
2421 } else {
2422 *op_class = 121;
2423 }
2424
2425 return true;
2426 }
2427
2428 /* 5 GHz, channels 149..169 */
2429 if (freq >= 5745 && freq <= 5845) {
2430 if (vht_opclass) {
2431 *op_class = vht_opclass;
2432 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
2433 if (freq > chandef->chan->center_freq)
2434 *op_class = 126;
2435 else
2436 *op_class = 127;
2437 } else if (freq <= 5805) {
2438 *op_class = 124;
2439 } else {
2440 *op_class = 125;
2441 }
2442
2443 return true;
2444 }
2445
2446 /* 56.16 GHz, channel 1..4 */
2447 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) {
2448 if (chandef->width >= NL80211_CHAN_WIDTH_40)
2449 return false;
2450
2451 *op_class = 180;
2452 return true;
2453 }
2454
2455 /* not supported yet */
2456 return false;
2457}
2458EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
2459
2460static int cfg80211_wdev_bi(struct wireless_dev *wdev)
2461{
2462 switch (wdev->iftype) {
2463 case NL80211_IFTYPE_AP:
2464 case NL80211_IFTYPE_P2P_GO:
2465 WARN_ON(wdev->valid_links);
2466 return wdev->links[0].ap.beacon_interval;
2467 case NL80211_IFTYPE_MESH_POINT:
2468 return wdev->u.mesh.beacon_interval;
2469 case NL80211_IFTYPE_ADHOC:
2470 return wdev->u.ibss.beacon_interval;
2471 default:
2472 break;
2473 }
2474
2475 return 0;
2476}
2477
2478static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
2479 u32 *beacon_int_gcd,
2480 bool *beacon_int_different,
2481 int radio_idx)
2482{
2483 struct cfg80211_registered_device *rdev;
2484 struct wireless_dev *wdev;
2485
2486 *beacon_int_gcd = 0;
2487 *beacon_int_different = false;
2488
2489 rdev = wiphy_to_rdev(wiphy);
2490 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
2491 int wdev_bi;
2492
2493 /* this feature isn't supported with MLO */
2494 if (wdev->valid_links)
2495 continue;
2496
2497 wdev_bi = cfg80211_wdev_bi(wdev);
2498 if (!wdev_bi)
2499 continue;
2500
2501 /* skip wdevs not active on the given wiphy radio */
2502 if (radio_idx >= 0 &&
2503 !(rdev_get_radio_mask(rdev, wdev->netdev) & BIT(radio_idx)))
2504 continue;
2505
2506 if (!*beacon_int_gcd) {
2507 *beacon_int_gcd = wdev_bi;
2508 continue;
2509 }
2510
2511 if (wdev_bi == *beacon_int_gcd)
2512 continue;
2513
2514 *beacon_int_different = true;
2515 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev_bi);
2516 }
2517
2518 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
2519 if (*beacon_int_gcd)
2520 *beacon_int_different = true;
2521 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
2522 }
2523}
2524
2525int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
2526 enum nl80211_iftype iftype, u32 beacon_int)
2527{
2528 /*
2529 * This is just a basic pre-condition check; if interface combinations
2530 * are possible the driver must already be checking those with a call
2531 * to cfg80211_check_combinations(), in which case we'll validate more
2532 * through the cfg80211_calculate_bi_data() call and code in
2533 * cfg80211_iter_combinations().
2534 */
2535
2536 if (beacon_int < 10 || beacon_int > 10000)
2537 return -EINVAL;
2538
2539 return 0;
2540}
2541
2542int cfg80211_iter_combinations(struct wiphy *wiphy,
2543 struct iface_combination_params *params,
2544 void (*iter)(const struct ieee80211_iface_combination *c,
2545 void *data),
2546 void *data)
2547{
2548 const struct wiphy_radio *radio = NULL;
2549 const struct ieee80211_iface_combination *c, *cs;
2550 const struct ieee80211_regdomain *regdom;
2551 enum nl80211_dfs_regions region = 0;
2552 int i, j, n, iftype;
2553 int num_interfaces = 0;
2554 u32 used_iftypes = 0;
2555 u32 beacon_int_gcd;
2556 bool beacon_int_different;
2557
2558 if (params->radio_idx >= 0)
2559 radio = &wiphy->radio[params->radio_idx];
2560
2561 /*
2562 * This is a bit strange, since the iteration used to rely only on
2563 * the data given by the driver, but here it now relies on context,
2564 * in form of the currently operating interfaces.
2565 * This is OK for all current users, and saves us from having to
2566 * push the GCD calculations into all the drivers.
2567 * In the future, this should probably rely more on data that's in
2568 * cfg80211 already - the only thing not would appear to be any new
2569 * interfaces (while being brought up) and channel/radar data.
2570 */
2571 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
2572 &beacon_int_gcd, &beacon_int_different,
2573 params->radio_idx);
2574
2575 if (params->radar_detect) {
2576 rcu_read_lock();
2577 regdom = rcu_dereference(cfg80211_regdomain);
2578 if (regdom)
2579 region = regdom->dfs_region;
2580 rcu_read_unlock();
2581 }
2582
2583 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
2584 num_interfaces += params->iftype_num[iftype];
2585 if (params->iftype_num[iftype] > 0 &&
2586 !cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
2587 used_iftypes |= BIT(iftype);
2588 }
2589
2590 if (radio) {
2591 cs = radio->iface_combinations;
2592 n = radio->n_iface_combinations;
2593 } else {
2594 cs = wiphy->iface_combinations;
2595 n = wiphy->n_iface_combinations;
2596 }
2597 for (i = 0; i < n; i++) {
2598 struct ieee80211_iface_limit *limits;
2599 u32 all_iftypes = 0;
2600
2601 c = &cs[i];
2602 if (num_interfaces > c->max_interfaces)
2603 continue;
2604 if (params->num_different_channels > c->num_different_channels)
2605 continue;
2606
2607 limits = kmemdup_array(c->limits, c->n_limits, sizeof(*limits),
2608 GFP_KERNEL);
2609 if (!limits)
2610 return -ENOMEM;
2611
2612 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
2613 if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
2614 continue;
2615 for (j = 0; j < c->n_limits; j++) {
2616 all_iftypes |= limits[j].types;
2617 if (!(limits[j].types & BIT(iftype)))
2618 continue;
2619 if (limits[j].max < params->iftype_num[iftype])
2620 goto cont;
2621 limits[j].max -= params->iftype_num[iftype];
2622 }
2623 }
2624
2625 if (params->radar_detect !=
2626 (c->radar_detect_widths & params->radar_detect))
2627 goto cont;
2628
2629 if (params->radar_detect && c->radar_detect_regions &&
2630 !(c->radar_detect_regions & BIT(region)))
2631 goto cont;
2632
2633 /* Finally check that all iftypes that we're currently
2634 * using are actually part of this combination. If they
2635 * aren't then we can't use this combination and have
2636 * to continue to the next.
2637 */
2638 if ((all_iftypes & used_iftypes) != used_iftypes)
2639 goto cont;
2640
2641 if (beacon_int_gcd) {
2642 if (c->beacon_int_min_gcd &&
2643 beacon_int_gcd < c->beacon_int_min_gcd)
2644 goto cont;
2645 if (!c->beacon_int_min_gcd && beacon_int_different)
2646 goto cont;
2647 }
2648
2649 /* This combination covered all interface types and
2650 * supported the requested numbers, so we're good.
2651 */
2652
2653 (*iter)(c, data);
2654 cont:
2655 kfree(limits);
2656 }
2657
2658 return 0;
2659}
2660EXPORT_SYMBOL(cfg80211_iter_combinations);
2661
2662static void
2663cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
2664 void *data)
2665{
2666 int *num = data;
2667 (*num)++;
2668}
2669
2670int cfg80211_check_combinations(struct wiphy *wiphy,
2671 struct iface_combination_params *params)
2672{
2673 int err, num = 0;
2674
2675 err = cfg80211_iter_combinations(wiphy, params,
2676 cfg80211_iter_sum_ifcombs, &num);
2677 if (err)
2678 return err;
2679 if (num == 0)
2680 return -EBUSY;
2681
2682 return 0;
2683}
2684EXPORT_SYMBOL(cfg80211_check_combinations);
2685
2686int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy,
2687 const struct ieee80211_channel *chan)
2688{
2689 const struct wiphy_radio *radio;
2690 int i, j;
2691 u32 freq;
2692
2693 if (!chan)
2694 return -EINVAL;
2695
2696 freq = ieee80211_channel_to_khz(chan);
2697 for (i = 0; i < wiphy->n_radio; i++) {
2698 radio = &wiphy->radio[i];
2699 for (j = 0; j < radio->n_freq_range; j++) {
2700 if (freq >= radio->freq_range[j].start_freq &&
2701 freq < radio->freq_range[j].end_freq)
2702 return i;
2703 }
2704 }
2705
2706 return -EINVAL;
2707}
2708EXPORT_SYMBOL(cfg80211_get_radio_idx_by_chan);
2709
2710int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
2711 const u8 *rates, unsigned int n_rates,
2712 u32 *mask)
2713{
2714 int i, j;
2715
2716 if (!sband)
2717 return -EINVAL;
2718
2719 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
2720 return -EINVAL;
2721
2722 *mask = 0;
2723
2724 for (i = 0; i < n_rates; i++) {
2725 int rate = (rates[i] & 0x7f) * 5;
2726 bool found = false;
2727
2728 for (j = 0; j < sband->n_bitrates; j++) {
2729 if (sband->bitrates[j].bitrate == rate) {
2730 found = true;
2731 *mask |= BIT(j);
2732 break;
2733 }
2734 }
2735 if (!found)
2736 return -EINVAL;
2737 }
2738
2739 /*
2740 * mask must have at least one bit set here since we
2741 * didn't accept a 0-length rates array nor allowed
2742 * entries in the array that didn't exist
2743 */
2744
2745 return 0;
2746}
2747
2748unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
2749{
2750 enum nl80211_band band;
2751 unsigned int n_channels = 0;
2752
2753 for (band = 0; band < NUM_NL80211_BANDS; band++)
2754 if (wiphy->bands[band])
2755 n_channels += wiphy->bands[band]->n_channels;
2756
2757 return n_channels;
2758}
2759EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
2760
2761int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
2762 struct station_info *sinfo)
2763{
2764 struct cfg80211_registered_device *rdev;
2765 struct wireless_dev *wdev;
2766
2767 wdev = dev->ieee80211_ptr;
2768 if (!wdev)
2769 return -EOPNOTSUPP;
2770
2771 rdev = wiphy_to_rdev(wdev->wiphy);
2772 if (!rdev->ops->get_station)
2773 return -EOPNOTSUPP;
2774
2775 memset(sinfo, 0, sizeof(*sinfo));
2776
2777 guard(wiphy)(&rdev->wiphy);
2778
2779 return rdev_get_station(rdev, wdev, mac_addr, sinfo);
2780}
2781EXPORT_SYMBOL(cfg80211_get_station);
2782
2783void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
2784{
2785 int i;
2786
2787 if (!f)
2788 return;
2789
2790 kfree(f->serv_spec_info);
2791 kfree(f->srf_bf);
2792 kfree(f->srf_macs);
2793 for (i = 0; i < f->num_rx_filters; i++)
2794 kfree(f->rx_filters[i].filter);
2795
2796 for (i = 0; i < f->num_tx_filters; i++)
2797 kfree(f->tx_filters[i].filter);
2798
2799 kfree(f->rx_filters);
2800 kfree(f->tx_filters);
2801 kfree(f);
2802}
2803EXPORT_SYMBOL(cfg80211_free_nan_func);
2804
2805bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
2806 u32 center_freq_khz, u32 bw_khz)
2807{
2808 u32 start_freq_khz, end_freq_khz;
2809
2810 start_freq_khz = center_freq_khz - (bw_khz / 2);
2811 end_freq_khz = center_freq_khz + (bw_khz / 2);
2812
2813 if (start_freq_khz >= freq_range->start_freq_khz &&
2814 end_freq_khz <= freq_range->end_freq_khz)
2815 return true;
2816
2817 return false;
2818}
2819
2820int cfg80211_link_sinfo_alloc_tid_stats(struct link_station_info *link_sinfo,
2821 gfp_t gfp)
2822{
2823 link_sinfo->pertid = kzalloc_objs(*link_sinfo->pertid,
2824 IEEE80211_NUM_TIDS + 1, gfp);
2825 if (!link_sinfo->pertid)
2826 return -ENOMEM;
2827
2828 return 0;
2829}
2830EXPORT_SYMBOL(cfg80211_link_sinfo_alloc_tid_stats);
2831
2832int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp)
2833{
2834 sinfo->pertid = kzalloc_objs(*(sinfo->pertid), IEEE80211_NUM_TIDS + 1,
2835 gfp);
2836 if (!sinfo->pertid)
2837 return -ENOMEM;
2838
2839 return 0;
2840}
2841EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats);
2842
2843/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
2844/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
2845const unsigned char rfc1042_header[] __aligned(2) =
2846 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2847EXPORT_SYMBOL(rfc1042_header);
2848
2849/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
2850const unsigned char bridge_tunnel_header[] __aligned(2) =
2851 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
2852EXPORT_SYMBOL(bridge_tunnel_header);
2853
2854/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
2855struct iapp_layer2_update {
2856 u8 da[ETH_ALEN]; /* broadcast */
2857 u8 sa[ETH_ALEN]; /* STA addr */
2858 __be16 len; /* 6 */
2859 u8 dsap; /* 0 */
2860 u8 ssap; /* 0 */
2861 u8 control;
2862 u8 xid_info[3];
2863} __packed;
2864
2865void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr)
2866{
2867 struct iapp_layer2_update *msg;
2868 struct sk_buff *skb;
2869
2870 /* Send Level 2 Update Frame to update forwarding tables in layer 2
2871 * bridge devices */
2872
2873 skb = dev_alloc_skb(sizeof(*msg));
2874 if (!skb)
2875 return;
2876 msg = skb_put(skb, sizeof(*msg));
2877
2878 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
2879 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
2880
2881 eth_broadcast_addr(msg->da);
2882 ether_addr_copy(msg->sa, addr);
2883 msg->len = htons(6);
2884 msg->dsap = 0;
2885 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
2886 msg->control = 0xaf; /* XID response lsb.1111F101.
2887 * F=0 (no poll command; unsolicited frame) */
2888 msg->xid_info[0] = 0x81; /* XID format identifier */
2889 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
2890 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
2891
2892 skb->dev = dev;
2893 skb->protocol = eth_type_trans(skb, dev);
2894 memset(skb->cb, 0, sizeof(skb->cb));
2895 netif_rx(skb);
2896}
2897EXPORT_SYMBOL(cfg80211_send_layer2_update);
2898
2899int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
2900 enum ieee80211_vht_chanwidth bw,
2901 int mcs, bool ext_nss_bw_capable,
2902 unsigned int max_vht_nss)
2903{
2904 u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map);
2905 int ext_nss_bw;
2906 int supp_width;
2907 int i, mcs_encoding;
2908
2909 if (map == 0xffff)
2910 return 0;
2911
2912 if (WARN_ON(mcs > 9 || max_vht_nss > 8))
2913 return 0;
2914 if (mcs <= 7)
2915 mcs_encoding = 0;
2916 else if (mcs == 8)
2917 mcs_encoding = 1;
2918 else
2919 mcs_encoding = 2;
2920
2921 if (!max_vht_nss) {
2922 /* find max_vht_nss for the given MCS */
2923 for (i = 7; i >= 0; i--) {
2924 int supp = (map >> (2 * i)) & 3;
2925
2926 if (supp == 3)
2927 continue;
2928
2929 if (supp >= mcs_encoding) {
2930 max_vht_nss = i + 1;
2931 break;
2932 }
2933 }
2934 }
2935
2936 if (!(cap->supp_mcs.tx_mcs_map &
2937 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
2938 return max_vht_nss;
2939
2940 ext_nss_bw = le32_get_bits(cap->vht_cap_info,
2941 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2942 supp_width = le32_get_bits(cap->vht_cap_info,
2943 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2944
2945 /* if not capable, treat ext_nss_bw as 0 */
2946 if (!ext_nss_bw_capable)
2947 ext_nss_bw = 0;
2948
2949 /* This is invalid */
2950 if (supp_width == 3)
2951 return 0;
2952
2953 /* This is an invalid combination so pretend nothing is supported */
2954 if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2))
2955 return 0;
2956
2957 /*
2958 * Cover all the special cases according to IEEE 802.11-2016
2959 * Table 9-250. All other cases are either factor of 1 or not
2960 * valid/supported.
2961 */
2962 switch (bw) {
2963 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2964 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2965 if ((supp_width == 1 || supp_width == 2) &&
2966 ext_nss_bw == 3)
2967 return 2 * max_vht_nss;
2968 break;
2969 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2970 if (supp_width == 0 &&
2971 (ext_nss_bw == 1 || ext_nss_bw == 2))
2972 return max_vht_nss / 2;
2973 if (supp_width == 0 &&
2974 ext_nss_bw == 3)
2975 return (3 * max_vht_nss) / 4;
2976 if (supp_width == 1 &&
2977 ext_nss_bw == 3)
2978 return 2 * max_vht_nss;
2979 break;
2980 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2981 if (supp_width == 0 && ext_nss_bw == 1)
2982 return 0; /* not possible */
2983 if (supp_width == 0 &&
2984 ext_nss_bw == 2)
2985 return max_vht_nss / 2;
2986 if (supp_width == 0 &&
2987 ext_nss_bw == 3)
2988 return (3 * max_vht_nss) / 4;
2989 if (supp_width == 1 &&
2990 ext_nss_bw == 0)
2991 return 0; /* not possible */
2992 if (supp_width == 1 &&
2993 ext_nss_bw == 1)
2994 return max_vht_nss / 2;
2995 if (supp_width == 1 &&
2996 ext_nss_bw == 2)
2997 return (3 * max_vht_nss) / 4;
2998 break;
2999 }
3000
3001 /* not covered or invalid combination received */
3002 return max_vht_nss;
3003}
3004EXPORT_SYMBOL(ieee80211_get_vht_max_nss);
3005
3006bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
3007 bool is_4addr, u8 check_swif)
3008
3009{
3010 bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN;
3011
3012 switch (check_swif) {
3013 case 0:
3014 if (is_vlan && is_4addr)
3015 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
3016 return wiphy->interface_modes & BIT(iftype);
3017 case 1:
3018 if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan)
3019 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
3020 return wiphy->software_iftypes & BIT(iftype);
3021 default:
3022 break;
3023 }
3024
3025 return false;
3026}
3027EXPORT_SYMBOL(cfg80211_iftype_allowed);
3028
3029void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id)
3030{
3031 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
3032
3033 lockdep_assert_wiphy(wdev->wiphy);
3034
3035 switch (wdev->iftype) {
3036 case NL80211_IFTYPE_AP:
3037 case NL80211_IFTYPE_P2P_GO:
3038 cfg80211_stop_ap(rdev, wdev->netdev, link_id, true);
3039 break;
3040 default:
3041 /* per-link not relevant */
3042 break;
3043 }
3044
3045 rdev_del_intf_link(rdev, wdev, link_id);
3046
3047 wdev->valid_links &= ~BIT(link_id);
3048 eth_zero_addr(wdev->links[link_id].addr);
3049}
3050
3051void cfg80211_remove_links(struct wireless_dev *wdev)
3052{
3053 unsigned int link_id;
3054
3055 /*
3056 * links are controlled by upper layers (userspace/cfg)
3057 * only for AP mode, so only remove them here for AP
3058 */
3059 if (wdev->iftype != NL80211_IFTYPE_AP)
3060 return;
3061
3062 if (wdev->valid_links) {
3063 for_each_valid_link(wdev, link_id)
3064 cfg80211_remove_link(wdev, link_id);
3065 }
3066}
3067
3068int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev,
3069 struct wireless_dev *wdev)
3070{
3071 cfg80211_remove_links(wdev);
3072
3073 return rdev_del_virtual_intf(rdev, wdev);
3074}
3075
3076const struct wiphy_iftype_ext_capab *
3077cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type)
3078{
3079 int i;
3080
3081 for (i = 0; i < wiphy->num_iftype_ext_capab; i++) {
3082 if (wiphy->iftype_ext_capab[i].iftype == type)
3083 return &wiphy->iftype_ext_capab[i];
3084 }
3085
3086 return NULL;
3087}
3088EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa);
3089
3090bool ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio,
3091 u32 freq, u32 width)
3092{
3093 const struct wiphy_radio_freq_range *r;
3094 int i;
3095
3096 for (i = 0; i < radio->n_freq_range; i++) {
3097 r = &radio->freq_range[i];
3098 if (freq - width / 2 >= r->start_freq &&
3099 freq + width / 2 <= r->end_freq)
3100 return true;
3101 }
3102
3103 return false;
3104}
3105EXPORT_SYMBOL(ieee80211_radio_freq_range_valid);
3106
3107bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
3108 const struct cfg80211_chan_def *chandef)
3109{
3110 u32 freq, width;
3111
3112 freq = ieee80211_chandef_to_khz(chandef);
3113 width = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef));
3114 if (!ieee80211_radio_freq_range_valid(radio, freq, width))
3115 return false;
3116
3117 freq = MHZ_TO_KHZ(chandef->center_freq2);
3118 if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width))
3119 return false;
3120
3121 return true;
3122}
3123EXPORT_SYMBOL(cfg80211_radio_chandef_valid);
3124
3125bool cfg80211_wdev_channel_allowed(struct wireless_dev *wdev,
3126 struct ieee80211_channel *chan)
3127{
3128 struct wiphy *wiphy = wdev->wiphy;
3129 const struct wiphy_radio *radio;
3130 struct cfg80211_chan_def chandef;
3131 u32 radio_mask;
3132 int i;
3133
3134 radio_mask = wdev->radio_mask;
3135 if (!wiphy->n_radio || radio_mask == BIT(wiphy->n_radio) - 1)
3136 return true;
3137
3138 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_HT20);
3139 for (i = 0; i < wiphy->n_radio; i++) {
3140 if (!(radio_mask & BIT(i)))
3141 continue;
3142
3143 radio = &wiphy->radio[i];
3144 if (!cfg80211_radio_chandef_valid(radio, &chandef))
3145 continue;
3146
3147 return true;
3148 }
3149
3150 return false;
3151}
3152EXPORT_SYMBOL(cfg80211_wdev_channel_allowed);