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mac80211: consider RX NSS in UHB connection
[linux-block.git] / net / wireless / util.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
8318d78a
JB		 2/*
3 * Wireless utility functions
4 *
d3236553 5 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
2740f0cf 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c4cbaf79 7 * Copyright 2017 Intel Deutschland GmbH
9166cc49 8 * Copyright (C) 2018-2020 Intel Corporation
8318d78a 9 */
bc3b2d7f 10#include <linux/export.h>
d3236553 11#include <linux/bitops.h>
e31a16d6 12#include <linux/etherdevice.h>
5a0e3ad6 13#include <linux/slab.h>
b0aa75f0 14#include <linux/ieee80211.h>
d3236553 15#include <net/cfg80211.h>
e31a16d6 16#include <net/ip.h>
b156579b 17#include <net/dsfield.h>
c6ca5e28 18#include <linux/if_vlan.h>
960d97f9 19#include <linux/mpls.h>
4c8dea63 20#include <linux/gcd.h>
b0aa75f0 21#include <linux/bitfield.h>
1fc9b725 22#include <linux/nospec.h>
8318d78a 23#include "core.h"
e35e4d28
HG		 24#include "rdev-ops.h"
25
8318d78a 26
623b988f 27const struct ieee80211_rate *
bd815252 28ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
881d948c 29 u32 basic_rates, int bitrate)
bd815252
JB		 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
74608aca
SW		 46u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
47 enum nl80211_bss_scan_width scan_width)
b422c6cd
AN		 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
57fbcce3 57 if (sband->band == NL80211_BAND_2GHZ) {
74608aca
SW		 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 {
b422c6cd 64 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
74608aca 65 }
b422c6cd
AN		 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
934f4c7d 75u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band)
8318d78a 76{
59eb21a6
BR		 77 /* see 802.11 17.3.8.3.2 and Annex J
78 * there are overlapping channel numbers in 5GHz and 2GHz bands */
3a0c52a6
VK		 79 if (chan <= 0)
80 return 0; /* not supported */
81 switch (band) {
57fbcce3 82 case NL80211_BAND_2GHZ:
63fa0426 83 case NL80211_BAND_LC:
59eb21a6 84 if (chan == 14)
934f4c7d 85 return MHZ_TO_KHZ(2484);
59eb21a6 86 else if (chan < 14)
934f4c7d 87 return MHZ_TO_KHZ(2407 + chan * 5);
3a0c52a6 88 break;
57fbcce3 89 case NL80211_BAND_5GHZ:
3a0c52a6 90 if (chan >= 182 && chan <= 196)
934f4c7d 91 return MHZ_TO_KHZ(4000 + chan * 5);
59eb21a6 92 else
934f4c7d 93 return MHZ_TO_KHZ(5000 + chan * 5);
3a0c52a6 94 break;
fa1f1085 95 case NL80211_BAND_6GHZ:
d1a1646c
AVS		 96 /* see 802.11ax D6.1 27.3.23.2 */
97 if (chan == 2)
98 return MHZ_TO_KHZ(5935);
c0de8776 99 if (chan <= 233)
d1a1646c 100 return MHZ_TO_KHZ(5950 + chan * 5);
fa1f1085 101 break;
57fbcce3 102 case NL80211_BAND_60GHZ:
9cf0a0b4 103 if (chan < 7)
934f4c7d 104 return MHZ_TO_KHZ(56160 + chan * 2160);
3a0c52a6 105 break;
df78a0c0
TP		 106 case NL80211_BAND_S1GHZ:
107 return 902000 + chan * 500;
3a0c52a6
VK		 108 default:
109 ;
59eb21a6 110 }
3a0c52a6 111 return 0; /* not supported */
8318d78a 112}
934f4c7d 113EXPORT_SYMBOL(ieee80211_channel_to_freq_khz);
8318d78a 114
11b34737
TP		 115enum nl80211_chan_width
116ieee80211_s1g_channel_width(const struct ieee80211_channel *chan)
117{
118 if (WARN_ON(!chan || chan->band != NL80211_BAND_S1GHZ))
119 return NL80211_CHAN_WIDTH_20_NOHT;
120
121 /*S1G defines a single allowed channel width per channel.
122 * Extract that width here.
123 */
124 if (chan->flags & IEEE80211_CHAN_1MHZ)
125 return NL80211_CHAN_WIDTH_1;
126 else if (chan->flags & IEEE80211_CHAN_2MHZ)
127 return NL80211_CHAN_WIDTH_2;
128 else if (chan->flags & IEEE80211_CHAN_4MHZ)
129 return NL80211_CHAN_WIDTH_4;
130 else if (chan->flags & IEEE80211_CHAN_8MHZ)
131 return NL80211_CHAN_WIDTH_8;
132 else if (chan->flags & IEEE80211_CHAN_16MHZ)
133 return NL80211_CHAN_WIDTH_16;
134
135 pr_err("unknown channel width for channel at %dKHz?\n",
136 ieee80211_channel_to_khz(chan));
137
138 return NL80211_CHAN_WIDTH_1;
139}
140EXPORT_SYMBOL(ieee80211_s1g_channel_width);
141
934f4c7d 142int ieee80211_freq_khz_to_channel(u32 freq)
8318d78a 143{
934f4c7d
TP		 144 /* TODO: just handle MHz for now */
145 freq = KHZ_TO_MHZ(freq);
146
59eb21a6 147 /* see 802.11 17.3.8.3.2 and Annex J */
8318d78a
JB		 148 if (freq == 2484)
149 return 14;
59eb21a6 150 else if (freq < 2484)
8318d78a 151 return (freq - 2407) / 5;
59eb21a6
BR		 152 else if (freq >= 4910 && freq <= 4980)
153 return (freq - 4000) / 5;
2d9b5550 154 else if (freq < 5925)
59eb21a6 155 return (freq - 5000) / 5;
2d9b5550
AS		 156 else if (freq == 5935)
157 return 2;
fa1f1085 158 else if (freq <= 45000) /* DMG band lower limit */
2d9b5550
AS		 159 /* see 802.11ax D6.1 27.3.22.2 */
160 return (freq - 5950) / 5;
9cf0a0b4 161 else if (freq >= 58320 && freq <= 70200)
3a0c52a6
VK		 162 return (freq - 56160) / 2160;
163 else
164 return 0;
8318d78a 165}
934f4c7d 166EXPORT_SYMBOL(ieee80211_freq_khz_to_channel);
8318d78a 167
934f4c7d
TP		 168struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy,
169 u32 freq)
906c730a 170{
57fbcce3 171 enum nl80211_band band;
906c730a
JB		 172 struct ieee80211_supported_band *sband;
173 int i;
174
57fbcce3 175 for (band = 0; band < NUM_NL80211_BANDS; band++) {
906c730a
JB		 176 sband = wiphy->bands[band];
177
178 if (!sband)
179 continue;
180
181 for (i = 0; i < sband->n_channels; i++) {
934f4c7d
TP		 182 struct ieee80211_channel *chan = &sband->channels[i];
183
184 if (ieee80211_channel_to_khz(chan) == freq)
185 return chan;
906c730a
JB		 186 }
187 }
188
189 return NULL;
190}
934f4c7d 191EXPORT_SYMBOL(ieee80211_get_channel_khz);
906c730a 192
343884c8 193static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
8318d78a
JB		 194{
195 int i, want;
196
343884c8 197 switch (sband->band) {
57fbcce3 198 case NL80211_BAND_5GHZ:
62524a58 199 case NL80211_BAND_6GHZ:
8318d78a
JB		 200 want = 3;
201 for (i = 0; i < sband->n_bitrates; i++) {
202 if (sband->bitrates[i].bitrate == 60 ||
203 sband->bitrates[i].bitrate == 120 ||
204 sband->bitrates[i].bitrate == 240) {
205 sband->bitrates[i].flags |=
206 IEEE80211_RATE_MANDATORY_A;
207 want--;
208 }
209 }
210 WARN_ON(want);
211 break;
57fbcce3 212 case NL80211_BAND_2GHZ:
63fa0426 213 case NL80211_BAND_LC:
8318d78a
JB		 214 want = 7;
215 for (i = 0; i < sband->n_bitrates; i++) {
1bd773c0
RS		 216 switch (sband->bitrates[i].bitrate) {
217 case 10:
218 case 20:
219 case 55:
220 case 110:
8318d78a
JB		 221 sband->bitrates[i].flags |=
222 IEEE80211_RATE_MANDATORY_B |
223 IEEE80211_RATE_MANDATORY_G;
224 want--;
1bd773c0
RS		 225 break;
226 case 60:
227 case 120:
228 case 240:
8318d78a
JB		 229 sband->bitrates[i].flags |=
230 IEEE80211_RATE_MANDATORY_G;
231 want--;
df561f66 232 fallthrough;
1bd773c0 233 default:
8318d78a
JB		 234 sband->bitrates[i].flags |=
235 IEEE80211_RATE_ERP_G;
1bd773c0
RS		 236 break;
237 }
8318d78a 238 }
1bd773c0 239 WARN_ON(want != 0 && want != 3);
8318d78a 240 break;
57fbcce3 241 case NL80211_BAND_60GHZ:
3a0c52a6
VK		 242 /* check for mandatory HT MCS 1..4 */
243 WARN_ON(!sband->ht_cap.ht_supported);
244 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
245 break;
df78a0c0
TP		 246 case NL80211_BAND_S1GHZ:
247 /* Figure 9-589bd: 3 means unsupported, so != 3 means at least
248 * mandatory is ok.
249 */
250 WARN_ON((sband->s1g_cap.nss_mcs[0] & 0x3) == 0x3);
251 break;
57fbcce3 252 case NUM_NL80211_BANDS:
343884c8 253 default:
8318d78a
JB		 254 WARN_ON(1);
255 break;
256 }
257}
258
259void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
260{
57fbcce3 261 enum nl80211_band band;
8318d78a 262
57fbcce3 263 for (band = 0; band < NUM_NL80211_BANDS; band++)
8318d78a 264 if (wiphy->bands[band])
343884c8 265 set_mandatory_flags_band(wiphy->bands[band]);
8318d78a 266}
08645126 267
38ba3c57
JM		 268bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
269{
270 int i;
271 for (i = 0; i < wiphy->n_cipher_suites; i++)
272 if (cipher == wiphy->cipher_suites[i])
273 return true;
274 return false;
275}
276
2d946308
AT		 277static bool
278cfg80211_igtk_cipher_supported(struct cfg80211_registered_device *rdev)
279{
280 struct wiphy *wiphy = &rdev->wiphy;
281 int i;
282
283 for (i = 0; i < wiphy->n_cipher_suites; i++) {
284 switch (wiphy->cipher_suites[i]) {
285 case WLAN_CIPHER_SUITE_AES_CMAC:
286 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
287 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
288 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
289 return true;
290 }
291 }
292
293 return false;
294}
295
296bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev,
297 int key_idx, bool pairwise)
08645126 298{
2d946308 299 int max_key_idx;
56be393f 300
2d946308
AT		 301 if (pairwise)
302 max_key_idx = 3;
303 else if (wiphy_ext_feature_isset(&rdev->wiphy,
304 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
305 wiphy_ext_feature_isset(&rdev->wiphy,
306 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
56be393f 307 max_key_idx = 7;
2d946308
AT		 308 else if (cfg80211_igtk_cipher_supported(rdev))
309 max_key_idx = 5;
310 else
311 max_key_idx = 3;
312
56be393f 313 if (key_idx < 0 || key_idx > max_key_idx)
2d946308
AT		 314 return false;
315
316 return true;
317}
318
319int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
320 struct key_params *params, int key_idx,
321 bool pairwise, const u8 *mac_addr)
322{
323 if (!cfg80211_valid_key_idx(rdev, key_idx, pairwise))
08645126
JB		 324 return -EINVAL;
325
e31b8213
JB		 326 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
327 return -EINVAL;
328
329 if (pairwise && !mac_addr)
330 return -EINVAL;
331
37720569
JM		 332 switch (params->cipher) {
333 case WLAN_CIPHER_SUITE_TKIP:
b67fd72e
AW		 334 /* Extended Key ID can only be used with CCMP/GCMP ciphers */
335 if ((pairwise && key_idx) ||
336 params->mode != NL80211_KEY_RX_TX)
337 return -EINVAL;
338 break;
37720569 339 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 340 case WLAN_CIPHER_SUITE_CCMP_256:
341 case WLAN_CIPHER_SUITE_GCMP:
342 case WLAN_CIPHER_SUITE_GCMP_256:
b67fd72e
AW		 343 /* IEEE802.11-2016 allows only 0 and - when supporting
344 * Extended Key ID - 1 as index for pairwise keys.
6cdd3979
AW		 345 * @NL80211_KEY_NO_TX is only allowed for pairwise keys when
346 * the driver supports Extended Key ID.
347 * @NL80211_KEY_SET_TX can't be set when installing and
348 * validating a key.
37720569 349 */
b67fd72e
AW		 350 if ((params->mode == NL80211_KEY_NO_TX && !pairwise) ||
351 params->mode == NL80211_KEY_SET_TX)
352 return -EINVAL;
353 if (wiphy_ext_feature_isset(&rdev->wiphy,
354 NL80211_EXT_FEATURE_EXT_KEY_ID)) {
355 if (pairwise && (key_idx < 0 || key_idx > 1))
6cdd3979 356 return -EINVAL;
b67fd72e 357 } else if (pairwise && key_idx) {
37720569 358 return -EINVAL;
6cdd3979 359 }
37720569
JM		 360 break;
361 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 362 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
363 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
364 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
37720569
JM		 365 /* Disallow BIP (group-only) cipher as pairwise cipher */
366 if (pairwise)
367 return -EINVAL;
e9c8f8d3
JB		 368 if (key_idx < 4)
369 return -EINVAL;
37720569 370 break;
e9c8f8d3
JB		 371 case WLAN_CIPHER_SUITE_WEP40:
372 case WLAN_CIPHER_SUITE_WEP104:
373 if (key_idx > 3)
374 return -EINVAL;
01c9c0ab 375 break;
37720569
JM		 376 default:
377 break;
378 }
08645126 379
08645126
JB		 380 switch (params->cipher) {
381 case WLAN_CIPHER_SUITE_WEP40:
8fc0fee0 382 if (params->key_len != WLAN_KEY_LEN_WEP40)
08645126
JB		 383 return -EINVAL;
384 break;
385 case WLAN_CIPHER_SUITE_TKIP:
8fc0fee0 386 if (params->key_len != WLAN_KEY_LEN_TKIP)
08645126
JB		 387 return -EINVAL;
388 break;
389 case WLAN_CIPHER_SUITE_CCMP:
8fc0fee0 390 if (params->key_len != WLAN_KEY_LEN_CCMP)
08645126
JB		 391 return -EINVAL;
392 break;
cfcf1682
JM		 393 case WLAN_CIPHER_SUITE_CCMP_256:
394 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
395 return -EINVAL;
396 break;
397 case WLAN_CIPHER_SUITE_GCMP:
398 if (params->key_len != WLAN_KEY_LEN_GCMP)
399 return -EINVAL;
400 break;
401 case WLAN_CIPHER_SUITE_GCMP_256:
402 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
403 return -EINVAL;
404 break;
08645126 405 case WLAN_CIPHER_SUITE_WEP104:
8fc0fee0 406 if (params->key_len != WLAN_KEY_LEN_WEP104)
08645126
JB		 407 return -EINVAL;
408 break;
409 case WLAN_CIPHER_SUITE_AES_CMAC:
8fc0fee0 410 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
08645126
JB		 411 return -EINVAL;
412 break;
cfcf1682
JM		 413 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
414 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
415 return -EINVAL;
416 break;
417 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
418 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
419 return -EINVAL;
420 break;
421 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
422 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
423 return -EINVAL;
424 break;
08645126 425 default:
7d64b7cc
JB		 426 /*
427 * We don't know anything about this algorithm,
428 * allow using it -- but the driver must check
429 * all parameters! We still check below whether
430 * or not the driver supports this algorithm,
431 * of course.
432 */
433 break;
08645126
JB		 434 }
435
9f26a952
JM		 436 if (params->seq) {
437 switch (params->cipher) {
438 case WLAN_CIPHER_SUITE_WEP40:
439 case WLAN_CIPHER_SUITE_WEP104:
440 /* These ciphers do not use key sequence */
441 return -EINVAL;
442 case WLAN_CIPHER_SUITE_TKIP:
443 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 444 case WLAN_CIPHER_SUITE_CCMP_256:
445 case WLAN_CIPHER_SUITE_GCMP:
446 case WLAN_CIPHER_SUITE_GCMP_256:
9f26a952 447 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 448 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
449 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
450 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
9f26a952
JM		 451 if (params->seq_len != 6)
452 return -EINVAL;
453 break;
454 }
455 }
456
38ba3c57 457 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
fffd0934
JB		 458 return -EINVAL;
459
08645126
JB		 460 return 0;
461}
e31a16d6 462
633adf1a 463unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
e31a16d6
ZY		 464{
465 unsigned int hdrlen = 24;
466
1d47f119
TP		 467 if (ieee80211_is_ext(fc)) {
468 hdrlen = 4;
469 goto out;
470 }
471
e31a16d6
ZY		 472 if (ieee80211_is_data(fc)) {
473 if (ieee80211_has_a4(fc))
474 hdrlen = 30;
d0dd2de0 475 if (ieee80211_is_data_qos(fc)) {
e31a16d6 476 hdrlen += IEEE80211_QOS_CTL_LEN;
d0dd2de0
AT		 477 if (ieee80211_has_order(fc))
478 hdrlen += IEEE80211_HT_CTL_LEN;
479 }
e31a16d6
ZY		 480 goto out;
481 }
482
fb142f4b
FC		 483 if (ieee80211_is_mgmt(fc)) {
484 if (ieee80211_has_order(fc))
485 hdrlen += IEEE80211_HT_CTL_LEN;
486 goto out;
487 }
488
e31a16d6
ZY		 489 if (ieee80211_is_ctl(fc)) {
490 /*
491 * ACK and CTS are 10 bytes, all others 16. To see how
492 * to get this condition consider
493 * subtype mask: 0b0000000011110000 (0x00F0)
494 * ACK subtype: 0b0000000011010000 (0x00D0)
495 * CTS subtype: 0b0000000011000000 (0x00C0)
496 * bits that matter: ^^^ (0x00E0)
497 * value of those: 0b0000000011000000 (0x00C0)
498 */
499 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
500 hdrlen = 10;
501 else
502 hdrlen = 16;
503 }
504out:
505 return hdrlen;
506}
507EXPORT_SYMBOL(ieee80211_hdrlen);
508
509unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
510{
511 const struct ieee80211_hdr *hdr =
512 (const struct ieee80211_hdr *)skb->data;
513 unsigned int hdrlen;
514
515 if (unlikely(skb->len < 10))
516 return 0;
517 hdrlen = ieee80211_hdrlen(hdr->frame_control);
518 if (unlikely(hdrlen > skb->len))
519 return 0;
520 return hdrlen;
521}
522EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
523
2d1c304c 524static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
e31a16d6 525{
2d1c304c 526 int ae = flags & MESH_FLAGS_AE;
7dd111e8 527 /* 802.11-2012, 8.2.4.7.3 */
e31a16d6 528 switch (ae) {
7dd111e8 529 default:
e31a16d6
ZY		 530 case 0:
531 return 6;
3c5772a5 532 case MESH_FLAGS_AE_A4:
e31a16d6 533 return 12;
3c5772a5 534 case MESH_FLAGS_AE_A5_A6:
e31a16d6 535 return 18;
e31a16d6
ZY		 536 }
537}
2d1c304c
FF		 538
539unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
540{
541 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
542}
9b395bc3 543EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
e31a16d6 544
7f6990c8 545int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
24bba078 546 const u8 *addr, enum nl80211_iftype iftype,
a1d5ff56 547 u8 data_offset, bool is_amsdu)
e31a16d6
ZY		 548{
549 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2d1c304c
FF		 550 struct {
551 u8 hdr[ETH_ALEN] __aligned(2);
552 __be16 proto;
553 } payload;
554 struct ethhdr tmp;
555 u16 hdrlen;
556 u8 mesh_flags = 0;
e31a16d6
ZY		 557
558 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
559 return -1;
560
24bba078 561 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
2d1c304c
FF		 562 if (skb->len < hdrlen + 8)
563 return -1;
e31a16d6
ZY		 564
565 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
566 * header
567 * IEEE 802.11 address fields:
568 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
569 * 0 0 DA SA BSSID n/a
570 * 0 1 DA BSSID SA n/a
571 * 1 0 BSSID SA DA n/a
572 * 1 1 RA TA DA SA
573 */
2d1c304c
FF		 574 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
575 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
576
577 if (iftype == NL80211_IFTYPE_MESH_POINT)
578 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
e31a16d6 579
5667c86a
RM		 580 mesh_flags &= MESH_FLAGS_AE;
581
e31a16d6
ZY		 582 switch (hdr->frame_control &
583 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
584 case cpu_to_le16(IEEE80211_FCTL_TODS):
585 if (unlikely(iftype != NL80211_IFTYPE_AP &&
074ac8df
JB		 586 iftype != NL80211_IFTYPE_AP_VLAN &&
587 iftype != NL80211_IFTYPE_P2P_GO))
e31a16d6
ZY		 588 return -1;
589 break;
590 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
e7e0517c 591 if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT &&
f14543ee
FF		 592 iftype != NL80211_IFTYPE_AP_VLAN &&
593 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 594 return -1;
595 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 596 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f 597 return -1;
5667c86a 598 if (mesh_flags == MESH_FLAGS_AE_A5_A6) {
e3cf8b3f
ZY		 599 skb_copy_bits(skb, hdrlen +
600 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c 601 tmp.h_dest, 2 * ETH_ALEN);
e31a16d6 602 }
2d1c304c 603 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
e31a16d6
ZY		 604 }
605 break;
606 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5 607 if ((iftype != NL80211_IFTYPE_STATION &&
074ac8df
JB		 608 iftype != NL80211_IFTYPE_P2P_CLIENT &&
609 iftype != NL80211_IFTYPE_MESH_POINT) ||
2d1c304c
FF		 610 (is_multicast_ether_addr(tmp.h_dest) &&
611 ether_addr_equal(tmp.h_source, addr)))
e31a16d6 612 return -1;
3c5772a5 613 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 614 if (mesh_flags == MESH_FLAGS_AE_A5_A6)
7dd111e8 615 return -1;
5667c86a 616 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f
ZY		 617 skb_copy_bits(skb, hdrlen +
618 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c
FF		 619 tmp.h_source, ETH_ALEN);
620 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
3c5772a5 621 }
e31a16d6
ZY		 622 break;
623 case cpu_to_le16(0):
941c93cd 624 if (iftype != NL80211_IFTYPE_ADHOC &&
6e0bd6c3
RL		 625 iftype != NL80211_IFTYPE_STATION &&
626 iftype != NL80211_IFTYPE_OCB)
941c93cd 627 return -1;
e31a16d6
ZY		 628 break;
629 }
630
2d1c304c
FF		 631 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
632 tmp.h_proto = payload.proto;
e31a16d6 633
a1d5ff56 634 if (likely((!is_amsdu && ether_addr_equal(payload.hdr, rfc1042_header) &&
2d1c304c
FF		 635 tmp.h_proto != htons(ETH_P_AARP) &&
636 tmp.h_proto != htons(ETH_P_IPX)) ||
637 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
e31a16d6
ZY		 638 /* remove RFC1042 or Bridge-Tunnel encapsulation and
639 * replace EtherType */
2d1c304c
FF		 640 hdrlen += ETH_ALEN + 2;
641 else
c041778c 642 tmp.h_proto = htons(skb->len - hdrlen);
2d1c304c
FF		 643
644 pskb_pull(skb, hdrlen);
e31a16d6 645
2d1c304c 646 if (!ehdr)
d58ff351 647 ehdr = skb_push(skb, sizeof(struct ethhdr));
2d1c304c
FF		 648 memcpy(ehdr, &tmp, sizeof(tmp));
649
e31a16d6
ZY		 650 return 0;
651}
7f6990c8 652EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
e31a16d6 653
2b67f944
FF		 654static void
655__frame_add_frag(struct sk_buff *skb, struct page *page,
656 void *ptr, int len, int size)
657{
658 struct skb_shared_info *sh = skb_shinfo(skb);
659 int page_offset;
660
81c044fc 661 get_page(page);
2b67f944
FF		 662 page_offset = ptr - page_address(page);
663 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
664}
665
666static void
667__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
668 int offset, int len)
669{
670 struct skb_shared_info *sh = skb_shinfo(skb);
aa1702dd 671 const skb_frag_t *frag = &sh->frags[0];
2b67f944
FF		 672 struct page *frag_page;
673 void *frag_ptr;
674 int frag_len, frag_size;
675 int head_size = skb->len - skb->data_len;
676 int cur_len;
677
678 frag_page = virt_to_head_page(skb->head);
679 frag_ptr = skb->data;
680 frag_size = head_size;
681
682 while (offset >= frag_size) {
683 offset -= frag_size;
2b67f944
FF		 684 frag_page = skb_frag_page(frag);
685 frag_ptr = skb_frag_address(frag);
686 frag_size = skb_frag_size(frag);
aa1702dd 687 frag++;
2b67f944
FF		 688 }
689
690 frag_ptr += offset;
691 frag_len = frag_size - offset;
692
693 cur_len = min(len, frag_len);
694
695 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
696 len -= cur_len;
697
698 while (len > 0) {
2b67f944
FF		 699 frag_len = skb_frag_size(frag);
700 cur_len = min(len, frag_len);
701 __frame_add_frag(frame, skb_frag_page(frag),
702 skb_frag_address(frag), cur_len, frag_len);
703 len -= cur_len;
aa1702dd 704 frag++;
2b67f944
FF		 705 }
706}
707
230fd28a
FF		 708static struct sk_buff *
709__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
2b67f944 710 int offset, int len, bool reuse_frag)
230fd28a
FF		 711{
712 struct sk_buff *frame;
2b67f944 713 int cur_len = len;
230fd28a
FF		 714
715 if (skb->len - offset < len)
716 return NULL;
717
2b67f944
FF		 718 /*
719 * When reusing framents, copy some data to the head to simplify
720 * ethernet header handling and speed up protocol header processing
721 * in the stack later.
722 */
723 if (reuse_frag)
724 cur_len = min_t(int, len, 32);
725
230fd28a
FF		 726 /*
727 * Allocate and reserve two bytes more for payload
728 * alignment since sizeof(struct ethhdr) is 14.
729 */
2b67f944 730 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
16a910a6
GG		 731 if (!frame)
732 return NULL;
230fd28a
FF		 733
734 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
2b67f944
FF		 735 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
736
737 len -= cur_len;
738 if (!len)
739 return frame;
740
741 offset += cur_len;
742 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
230fd28a
FF		 743
744 return frame;
745}
eaf85ca7
ZY		 746
747void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
748 const u8 *addr, enum nl80211_iftype iftype,
8b3becad 749 const unsigned int extra_headroom,
8b935ee2 750 const u8 *check_da, const u8 *check_sa)
eaf85ca7 751{
230fd28a 752 unsigned int hlen = ALIGN(extra_headroom, 4);
eaf85ca7
ZY		 753 struct sk_buff *frame = NULL;
754 u16 ethertype;
755 u8 *payload;
7f6990c8 756 int offset = 0, remaining;
230fd28a 757 struct ethhdr eth;
2b67f944 758 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
2bf0ccc7 759 bool reuse_skb = false;
230fd28a 760 bool last = false;
88665f5a 761
230fd28a
FF		 762 while (!last) {
763 unsigned int subframe_len;
764 int len;
eaf85ca7 765 u8 padding;
eaf85ca7 766
230fd28a
FF		 767 skb_copy_bits(skb, offset, &eth, sizeof(eth));
768 len = ntohs(eth.h_proto);
769 subframe_len = sizeof(struct ethhdr) + len;
eaf85ca7 770 padding = (4 - subframe_len) & 0x3;
230fd28a 771
eaf85ca7 772 /* the last MSDU has no padding */
230fd28a 773 remaining = skb->len - offset;
eaf85ca7
ZY		 774 if (subframe_len > remaining)
775 goto purge;
2b8a1fee
MV		 776 /* mitigate A-MSDU aggregation injection attacks */
777 if (ether_addr_equal(eth.h_dest, rfc1042_header))
778 goto purge;
eaf85ca7 779
230fd28a 780 offset += sizeof(struct ethhdr);
230fd28a 781 last = remaining <= subframe_len + padding;
8b935ee2
JB		 782
783 /* FIXME: should we really accept multicast DA? */
784 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
785 !ether_addr_equal(check_da, eth.h_dest)) ||
786 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
787 offset += len + padding;
788 continue;
789 }
790
791 /* reuse skb for the last subframe */
2b67f944 792 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
230fd28a 793 skb_pull(skb, offset);
eaf85ca7 794 frame = skb;
230fd28a
FF		 795 reuse_skb = true;
796 } else {
2b67f944
FF		 797 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
798 reuse_frag);
eaf85ca7
ZY		 799 if (!frame)
800 goto purge;
801
230fd28a 802 offset += len + padding;
eaf85ca7
ZY		 803 }
804
805 skb_reset_network_header(frame);
806 frame->dev = skb->dev;
807 frame->priority = skb->priority;
808
809 payload = frame->data;
810 ethertype = (payload[6] << 8) | payload[7];
ac422d3c 811 if (likely((ether_addr_equal(payload, rfc1042_header) &&
eaf85ca7 812 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
ac422d3c 813 ether_addr_equal(payload, bridge_tunnel_header))) {
230fd28a
FF		 814 eth.h_proto = htons(ethertype);
815 skb_pull(frame, ETH_ALEN + 2);
eaf85ca7 816 }
230fd28a
FF		 817
818 memcpy(skb_push(frame, sizeof(eth)), &eth, sizeof(eth));
eaf85ca7
ZY		 819 __skb_queue_tail(list, frame);
820 }
821
230fd28a
FF		 822 if (!reuse_skb)
823 dev_kfree_skb(skb);
824
eaf85ca7
ZY		 825 return;
826
827 purge:
828 __skb_queue_purge(list);
eaf85ca7
ZY		 829 dev_kfree_skb(skb);
830}
831EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
832
e31a16d6 833/* Given a data frame determine the 802.1p/1d tag to use. */
fa9ffc74
KP		 834unsigned int cfg80211_classify8021d(struct sk_buff *skb,
835 struct cfg80211_qos_map *qos_map)
e31a16d6
ZY		 836{
837 unsigned int dscp;
c6ca5e28 838 unsigned char vlan_priority;
1fc9b725 839 unsigned int ret;
e31a16d6
ZY		 840
841 /* skb->priority values from 256->263 are magic values to
842 * directly indicate a specific 802.1d priority. This is used
843 * to allow 802.1d priority to be passed directly in from VLAN
844 * tags, etc.
845 */
1fc9b725
JB		 846 if (skb->priority >= 256 && skb->priority <= 263) {
847 ret = skb->priority - 256;
848 goto out;
849 }
e31a16d6 850
df8a39de
JP		 851 if (skb_vlan_tag_present(skb)) {
852 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
c6ca5e28 853 >> VLAN_PRIO_SHIFT;
1fc9b725
JB		 854 if (vlan_priority > 0) {
855 ret = vlan_priority;
856 goto out;
857 }
c6ca5e28
V		 858 }
859
e31a16d6
ZY		 860 switch (skb->protocol) {
861 case htons(ETH_P_IP):
b156579b
DT		 862 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
863 break;
864 case htons(ETH_P_IPV6):
865 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
e31a16d6 866 break;
960d97f9
SW		 867 case htons(ETH_P_MPLS_UC):
868 case htons(ETH_P_MPLS_MC): {
869 struct mpls_label mpls_tmp, *mpls;
870
871 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
872 sizeof(*mpls), &mpls_tmp);
873 if (!mpls)
874 return 0;
875
1fc9b725 876 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
960d97f9 877 >> MPLS_LS_TC_SHIFT;
1fc9b725 878 goto out;
960d97f9
SW		 879 }
880 case htons(ETH_P_80221):
881 /* 802.21 is always network control traffic */
882 return 7;
e31a16d6
ZY		 883 default:
884 return 0;
885 }
886
fa9ffc74
KP		 887 if (qos_map) {
888 unsigned int i, tmp_dscp = dscp >> 2;
889
890 for (i = 0; i < qos_map->num_des; i++) {
1fc9b725
JB		 891 if (tmp_dscp == qos_map->dscp_exception[i].dscp) {
892 ret = qos_map->dscp_exception[i].up;
893 goto out;
894 }
fa9ffc74
KP		 895 }
896
897 for (i = 0; i < 8; i++) {
898 if (tmp_dscp >= qos_map->up[i].low &&
1fc9b725
JB		 899 tmp_dscp <= qos_map->up[i].high) {
900 ret = i;
901 goto out;
902 }
fa9ffc74
KP		 903 }
904 }
905
1fc9b725
JB		 906 ret = dscp >> 5;
907out:
908 return array_index_nospec(ret, IEEE80211_NUM_TIDS);
e31a16d6
ZY		 909}
910EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6 911
49a68e0d 912const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id)
517357c6 913{
9caf0364
JB		 914 const struct cfg80211_bss_ies *ies;
915
916 ies = rcu_dereference(bss->ies);
917 if (!ies)
517357c6 918 return NULL;
9caf0364 919
49a68e0d 920 return cfg80211_find_elem(id, ies->data, ies->len);
517357c6 921}
49a68e0d 922EXPORT_SYMBOL(ieee80211_bss_get_elem);
fffd0934
JB		 923
924void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
925{
f26cbf40 926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934
JB		 927 struct net_device *dev = wdev->netdev;
928 int i;
929
930 if (!wdev->connect_keys)
931 return;
932
b8676221 933 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
fffd0934
JB		 934 if (!wdev->connect_keys->params[i].cipher)
935 continue;
e35e4d28
HG		 936 if (rdev_add_key(rdev, dev, i, false, NULL,
937 &wdev->connect_keys->params[i])) {
e9c0268f 938 netdev_err(dev, "failed to set key %d\n", i);
1e056665
ZY		 939 continue;
940 }
d4f29978
JB		 941 if (wdev->connect_keys->def == i &&
942 rdev_set_default_key(rdev, dev, i, true, true)) {
943 netdev_err(dev, "failed to set defkey %d\n", i);
944 continue;
945 }
fffd0934
JB		 946 }
947
453431a5 948 kfree_sensitive(wdev->connect_keys);
fffd0934
JB		 949 wdev->connect_keys = NULL;
950}
3d54d255 951
1f6fc43e 952void cfg80211_process_wdev_events(struct wireless_dev *wdev)
3d54d255
JB		 953{
954 struct cfg80211_event *ev;
955 unsigned long flags;
3d54d255
JB		 956
957 spin_lock_irqsave(&wdev->event_lock, flags);
958 while (!list_empty(&wdev->event_list)) {
959 ev = list_first_entry(&wdev->event_list,
960 struct cfg80211_event, list);
961 list_del(&ev->list);
962 spin_unlock_irqrestore(&wdev->event_lock, flags);
963
964 wdev_lock(wdev);
965 switch (ev->type) {
966 case EVENT_CONNECT_RESULT:
3d54d255 967 __cfg80211_connect_result(
5349a0f7
VK		 968 wdev->netdev,
969 &ev->cr,
970 ev->cr.status == WLAN_STATUS_SUCCESS);
3d54d255
JB		 971 break;
972 case EVENT_ROAMED:
29ce6ecb 973 __cfg80211_roamed(wdev, &ev->rm);
3d54d255
JB		 974 break;
975 case EVENT_DISCONNECTED:
976 __cfg80211_disconnected(wdev->netdev,
977 ev->dc.ie, ev->dc.ie_len,
80279fb7
JB		 978 ev->dc.reason,
979 !ev->dc.locally_generated);
3d54d255
JB		 980 break;
981 case EVENT_IBSS_JOINED:
fe94f3a4
AQ		 982 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
983 ev->ij.channel);
3d54d255 984 break;
f04c2203
MK		 985 case EVENT_STOPPED:
986 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
987 break;
503c1fb9
AS		 988 case EVENT_PORT_AUTHORIZED:
989 __cfg80211_port_authorized(wdev, ev->pa.bssid);
990 break;
3d54d255
JB		 991 }
992 wdev_unlock(wdev);
993
994 kfree(ev);
995
996 spin_lock_irqsave(&wdev->event_lock, flags);
997 }
998 spin_unlock_irqrestore(&wdev->event_lock, flags);
999}
1000
1001void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
1002{
1003 struct wireless_dev *wdev;
1004
a05829a7 1005 lockdep_assert_held(&rdev->wiphy.mtx);
3d54d255 1006
53873f13 1007 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
3d54d255 1008 cfg80211_process_wdev_events(wdev);
3d54d255
JB		 1009}
1010
1011int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
1012 struct net_device *dev, enum nl80211_iftype ntype,
818a986e 1013 struct vif_params *params)
3d54d255
JB		 1014{
1015 int err;
1016 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
1017
a05829a7 1018 lockdep_assert_held(&rdev->wiphy.mtx);
3d54d255
JB		 1019
1020 /* don't support changing VLANs, you just re-create them */
1021 if (otype == NL80211_IFTYPE_AP_VLAN)
1022 return -EOPNOTSUPP;
1023
cb3b7d87
AB		 1024 /* cannot change into P2P device or NAN */
1025 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
1026 ntype == NL80211_IFTYPE_NAN)
98104fde
JB		 1027 return -EOPNOTSUPP;
1028
3d54d255
JB		 1029 if (!rdev->ops->change_virtual_intf ||
1030 !(rdev->wiphy.interface_modes & (1 << ntype)))
1031 return -EOPNOTSUPP;
1032
6cbfb1bb 1033 if (ntype != otype) {
689a0a9f
JD		 1034 /* if it's part of a bridge, reject changing type to station/ibss */
1035 if (netif_is_bridge_port(dev) &&
1036 (ntype == NL80211_IFTYPE_ADHOC ||
1037 ntype == NL80211_IFTYPE_STATION ||
1038 ntype == NL80211_IFTYPE_P2P_CLIENT))
1039 return -EBUSY;
1040
9bc383de 1041 dev->ieee80211_ptr->use_4addr = false;
29cbe68c 1042 dev->ieee80211_ptr->mesh_id_up_len = 0;
194ff52d 1043 wdev_lock(dev->ieee80211_ptr);
fa9ffc74 1044 rdev_set_qos_map(rdev, dev, NULL);
194ff52d 1045 wdev_unlock(dev->ieee80211_ptr);
9bc383de 1046
3d54d255 1047 switch (otype) {
ac800140 1048 case NL80211_IFTYPE_AP:
563fbefe 1049 case NL80211_IFTYPE_P2P_GO:
7c8d5e03 1050 cfg80211_stop_ap(rdev, dev, true);
ac800140 1051 break;
3d54d255
JB		 1052 case NL80211_IFTYPE_ADHOC:
1053 cfg80211_leave_ibss(rdev, dev, false);
1054 break;
1055 case NL80211_IFTYPE_STATION:
074ac8df 1056 case NL80211_IFTYPE_P2P_CLIENT:
83739b03 1057 wdev_lock(dev->ieee80211_ptr);
3d54d255
JB		 1058 cfg80211_disconnect(rdev, dev,
1059 WLAN_REASON_DEAUTH_LEAVING, true);
83739b03 1060 wdev_unlock(dev->ieee80211_ptr);
3d54d255
JB		 1061 break;
1062 case NL80211_IFTYPE_MESH_POINT:
1063 /* mesh should be handled? */
1064 break;
a64b6a25
DC		 1065 case NL80211_IFTYPE_OCB:
1066 cfg80211_leave_ocb(rdev, dev);
1067 break;
3d54d255
JB		 1068 default:
1069 break;
1070 }
1071
1072 cfg80211_process_rdev_events(rdev);
c1d3ad84 1073 cfg80211_mlme_purge_registrations(dev->ieee80211_ptr);
3d54d255
JB		 1074 }
1075
818a986e 1076 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
3d54d255
JB		 1077
1078 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1079
9bc383de
JB		 1080 if (!err && params && params->use_4addr != -1)
1081 dev->ieee80211_ptr->use_4addr = params->use_4addr;
1082
ad4bb6f8
JB		 1083 if (!err) {
1084 dev->priv_flags &= ~IFF_DONT_BRIDGE;
1085 switch (ntype) {
1086 case NL80211_IFTYPE_STATION:
1087 if (dev->ieee80211_ptr->use_4addr)
1088 break;
df561f66 1089 fallthrough;
6e0bd6c3 1090 case NL80211_IFTYPE_OCB:
074ac8df 1091 case NL80211_IFTYPE_P2P_CLIENT:
ad4bb6f8
JB		 1092 case NL80211_IFTYPE_ADHOC:
1093 dev->priv_flags |= IFF_DONT_BRIDGE;
1094 break;
074ac8df 1095 case NL80211_IFTYPE_P2P_GO:
ad4bb6f8
JB		 1096 case NL80211_IFTYPE_AP:
1097 case NL80211_IFTYPE_AP_VLAN:
ad4bb6f8
JB		 1098 case NL80211_IFTYPE_MESH_POINT:
1099 /* bridging OK */
1100 break;
1101 case NL80211_IFTYPE_MONITOR:
1102 /* monitor can't bridge anyway */
1103 break;
1104 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1105 case NUM_NL80211_IFTYPES:
ad4bb6f8
JB		 1106 /* not happening */
1107 break;
98104fde 1108 case NL80211_IFTYPE_P2P_DEVICE:
e7e0517c 1109 case NL80211_IFTYPE_WDS:
cb3b7d87 1110 case NL80211_IFTYPE_NAN:
98104fde
JB		 1111 WARN_ON(1);
1112 break;
ad4bb6f8
JB		 1113 }
1114 }
1115
dbbae26a
MK		 1116 if (!err && ntype != otype && netif_running(dev)) {
1117 cfg80211_update_iface_num(rdev, ntype, 1);
1118 cfg80211_update_iface_num(rdev, otype, -1);
1119 }
1120
3d54d255
JB		 1121 return err;
1122}
254416aa 1123
0c1eca4e
JB		 1124static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
1125{
1126 int modulation, streams, bitrate;
1127
1128 /* the formula below does only work for MCS values smaller than 32 */
1129 if (WARN_ON_ONCE(rate->mcs >= 32))
1130 return 0;
1131
1132 modulation = rate->mcs & 7;
1133 streams = (rate->mcs >> 3) + 1;
1134
1135 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1136
1137 if (modulation < 4)
1138 bitrate *= (modulation + 1);
1139 else if (modulation == 4)
1140 bitrate *= (modulation + 2);
1141 else
1142 bitrate *= (modulation + 3);
1143
1144 bitrate *= streams;
1145
1146 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1147 bitrate = (bitrate / 9) * 10;
1148
1149 /* do NOT round down here */
1150 return (bitrate + 50000) / 100000;
1151}
1152
2a38075c 1153static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate)
95ddc1fc
VK		 1154{
1155 static const u32 __mcs2bitrate[] = {
1156 /* control PHY */
1157 [0] = 275,
1158 /* SC PHY */
1159 [1] = 3850,
1160 [2] = 7700,
1161 [3] = 9625,
1162 [4] = 11550,
1163 [5] = 12512, /* 1251.25 mbps */
1164 [6] = 15400,
1165 [7] = 19250,
1166 [8] = 23100,
1167 [9] = 25025,
1168 [10] = 30800,
1169 [11] = 38500,
1170 [12] = 46200,
1171 /* OFDM PHY */
1172 [13] = 6930,
1173 [14] = 8662, /* 866.25 mbps */
1174 [15] = 13860,
1175 [16] = 17325,
1176 [17] = 20790,
1177 [18] = 27720,
1178 [19] = 34650,
1179 [20] = 41580,
1180 [21] = 45045,
1181 [22] = 51975,
1182 [23] = 62370,
1183 [24] = 67568, /* 6756.75 mbps */
1184 /* LP-SC PHY */
1185 [25] = 6260,
1186 [26] = 8340,
1187 [27] = 11120,
1188 [28] = 12510,
1189 [29] = 16680,
1190 [30] = 22240,
1191 [31] = 25030,
1192 };
1193
1194 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1195 return 0;
1196
1197 return __mcs2bitrate[rate->mcs];
1198}
1199
d9c85e24
MC		 1200static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate)
1201{
1202 static const u32 __mcs2bitrate[] = {
1203 [6 - 6] = 26950, /* MCS 9.1 : 2695.0 mbps */
1204 [7 - 6] = 50050, /* MCS 12.1 */
1205 [8 - 6] = 53900,
1206 [9 - 6] = 57750,
1207 [10 - 6] = 63900,
1208 [11 - 6] = 75075,
1209 [12 - 6] = 80850,
1210 };
1211
1212 /* Extended SC MCS not defined for base MCS below 6 or above 12 */
1213 if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12))
1214 return 0;
1215
1216 return __mcs2bitrate[rate->mcs - 6];
1217}
1218
2a38075c
AAL		 1219static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate)
1220{
1221 static const u32 __mcs2bitrate[] = {
1222 /* control PHY */
1223 [0] = 275,
1224 /* SC PHY */
1225 [1] = 3850,
1226 [2] = 7700,
1227 [3] = 9625,
1228 [4] = 11550,
1229 [5] = 12512, /* 1251.25 mbps */
1230 [6] = 13475,
1231 [7] = 15400,
1232 [8] = 19250,
1233 [9] = 23100,
1234 [10] = 25025,
1235 [11] = 26950,
1236 [12] = 30800,
1237 [13] = 38500,
1238 [14] = 46200,
1239 [15] = 50050,
1240 [16] = 53900,
1241 [17] = 57750,
1242 [18] = 69300,
1243 [19] = 75075,
1244 [20] = 80850,
1245 };
1246
1247 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1248 return 0;
1249
1250 return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch;
1251}
1252
db9c64cf
JB		 1253static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1254{
c27aa56a 1255 static const u32 base[4][12] = {
db9c64cf
JB		 1256 { 6500000,
1257 13000000,
1258 19500000,
1259 26000000,
1260 39000000,
1261 52000000,
1262 58500000,
1263 65000000,
1264 78000000,
8fdd136f 1265 /* not in the spec, but some devices use this: */
c27aa56a
AS		 1266 86700000,
1267 97500000,
1268 108300000,
db9c64cf
JB		 1269 },
1270 { 13500000,
1271 27000000,
1272 40500000,
1273 54000000,
1274 81000000,
1275 108000000,
1276 121500000,
1277 135000000,
1278 162000000,
1279 180000000,
c27aa56a
AS		 1280 202500000,
1281 225000000,
db9c64cf
JB		 1282 },
1283 { 29300000,
1284 58500000,
1285 87800000,
1286 117000000,
1287 175500000,
1288 234000000,
1289 263300000,
1290 292500000,
1291 351000000,
1292 390000000,
c27aa56a
AS		 1293 438800000,
1294 487500000,
db9c64cf
JB		 1295 },
1296 { 58500000,
1297 117000000,
1298 175500000,
1299 234000000,
1300 351000000,
1301 468000000,
1302 526500000,
1303 585000000,
1304 702000000,
1305 780000000,
c27aa56a
AS		 1306 877500000,
1307 975000000,
db9c64cf
JB		 1308 },
1309 };
1310 u32 bitrate;
1311 int idx;
1312
c27aa56a 1313 if (rate->mcs > 11)
ca8fe250 1314 goto warn;
db9c64cf 1315
b51f3bee
JB		 1316 switch (rate->bw) {
1317 case RATE_INFO_BW_160:
1318 idx = 3;
1319 break;
1320 case RATE_INFO_BW_80:
1321 idx = 2;
1322 break;
1323 case RATE_INFO_BW_40:
1324 idx = 1;
1325 break;
1326 case RATE_INFO_BW_5:
1327 case RATE_INFO_BW_10:
1328 default:
ca8fe250 1329 goto warn;
b51f3bee
JB		 1330 case RATE_INFO_BW_20:
1331 idx = 0;
1332 }
db9c64cf
JB		 1333
1334 bitrate = base[idx][rate->mcs];
1335 bitrate *= rate->nss;
1336
1337 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1338 bitrate = (bitrate / 9) * 10;
1339
1340 /* do NOT round down here */
1341 return (bitrate + 50000) / 100000;
ca8fe250
JB		 1342 warn:
1343 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1344 rate->bw, rate->mcs, rate->nss);
1345 return 0;
db9c64cf
JB		 1346}
1347
c4cbaf79
LC		 1348static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
1349{
9c97c88d
VK		 1350#define SCALE 6144
1351 u32 mcs_divisors[14] = {
1352 102399, /* 16.666666... */
1353 51201, /* 8.333333... */
1354 34134, /* 5.555555... */
1355 25599, /* 4.166666... */
1356 17067, /* 2.777777... */
1357 12801, /* 2.083333... */
1358 11769, /* 1.851851... */
1359 10239, /* 1.666666... */
1360 8532, /* 1.388888... */
1361 7680, /* 1.250000... */
1362 6828, /* 1.111111... */
1363 6144, /* 1.000000... */
1364 5690, /* 0.926106... */
1365 5120, /* 0.833333... */
c4cbaf79
LC		 1366 };
1367 u32 rates_160M[3] = { 960777777, 907400000, 816666666 };
1368 u32 rates_969[3] = { 480388888, 453700000, 408333333 };
1369 u32 rates_484[3] = { 229411111, 216666666, 195000000 };
1370 u32 rates_242[3] = { 114711111, 108333333, 97500000 };
1371 u32 rates_106[3] = { 40000000, 37777777, 34000000 };
1372 u32 rates_52[3] = { 18820000, 17777777, 16000000 };
1373 u32 rates_26[3] = { 9411111, 8888888, 8000000 };
1374 u64 tmp;
1375 u32 result;
1376
9c97c88d 1377 if (WARN_ON_ONCE(rate->mcs > 13))
c4cbaf79
LC		 1378 return 0;
1379
1380 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2))
1381 return 0;
1382 if (WARN_ON_ONCE(rate->he_ru_alloc >
1383 NL80211_RATE_INFO_HE_RU_ALLOC_2x996))
1384 return 0;
1385 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
1386 return 0;
1387
1388 if (rate->bw == RATE_INFO_BW_160)
1389 result = rates_160M[rate->he_gi];
1390 else if (rate->bw == RATE_INFO_BW_80 ||
1391 (rate->bw == RATE_INFO_BW_HE_RU &&
1392 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996))
1393 result = rates_969[rate->he_gi];
1394 else if (rate->bw == RATE_INFO_BW_40 ||
1395 (rate->bw == RATE_INFO_BW_HE_RU &&
1396 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484))
1397 result = rates_484[rate->he_gi];
1398 else if (rate->bw == RATE_INFO_BW_20 ||
1399 (rate->bw == RATE_INFO_BW_HE_RU &&
1400 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242))
1401 result = rates_242[rate->he_gi];
1402 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1403 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106)
1404 result = rates_106[rate->he_gi];
1405 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1406 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52)
1407 result = rates_52[rate->he_gi];
1408 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1409 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26)
1410 result = rates_26[rate->he_gi];
344c9719
NC		 1411 else {
1412 WARN(1, "invalid HE MCS: bw:%d, ru:%d\n",
1413 rate->bw, rate->he_ru_alloc);
c4cbaf79 1414 return 0;
344c9719 1415 }
c4cbaf79
LC		 1416
1417 /* now scale to the appropriate MCS */
1418 tmp = result;
1419 tmp *= SCALE;
1420 do_div(tmp, mcs_divisors[rate->mcs]);
1421 result = tmp;
1422
1423 /* and take NSS, DCM into account */
1424 result = (result * rate->nss) / 8;
1425 if (rate->he_dcm)
1426 result /= 2;
1427
25d16d12 1428 return result / 10000;
c4cbaf79
LC		 1429}
1430
8eb41c8d 1431u32 cfg80211_calculate_bitrate(struct rate_info *rate)
254416aa 1432{
0c1eca4e
JB		 1433 if (rate->flags & RATE_INFO_FLAGS_MCS)
1434 return cfg80211_calculate_bitrate_ht(rate);
2a38075c
AAL		 1435 if (rate->flags & RATE_INFO_FLAGS_DMG)
1436 return cfg80211_calculate_bitrate_dmg(rate);
d9c85e24
MC		 1437 if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG)
1438 return cfg80211_calculate_bitrate_extended_sc_dmg(rate);
2a38075c
AAL		 1439 if (rate->flags & RATE_INFO_FLAGS_EDMG)
1440 return cfg80211_calculate_bitrate_edmg(rate);
db9c64cf
JB		 1441 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1442 return cfg80211_calculate_bitrate_vht(rate);
c4cbaf79
LC		 1443 if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
1444 return cfg80211_calculate_bitrate_he(rate);
254416aa 1445
0c1eca4e 1446 return rate->legacy;
254416aa 1447}
8097e149 1448EXPORT_SYMBOL(cfg80211_calculate_bitrate);
56d1893d 1449
c216e641
AS		 1450int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1451 enum ieee80211_p2p_attr_id attr,
1452 u8 *buf, unsigned int bufsize)
0ee45355
JB		 1453{
1454 u8 *out = buf;
1455 u16 attr_remaining = 0;
1456 bool desired_attr = false;
1457 u16 desired_len = 0;
1458
1459 while (len > 0) {
1460 unsigned int iedatalen;
1461 unsigned int copy;
1462 const u8 *iedata;
1463
1464 if (len < 2)
1465 return -EILSEQ;
1466 iedatalen = ies[1];
1467 if (iedatalen + 2 > len)
1468 return -EILSEQ;
1469
1470 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1471 goto cont;
1472
1473 if (iedatalen < 4)
1474 goto cont;
1475
1476 iedata = ies + 2;
1477
1478 /* check WFA OUI, P2P subtype */
1479 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1480 iedata[2] != 0x9a || iedata[3] != 0x09)
1481 goto cont;
1482
1483 iedatalen -= 4;
1484 iedata += 4;
1485
1486 /* check attribute continuation into this IE */
1487 copy = min_t(unsigned int, attr_remaining, iedatalen);
1488 if (copy && desired_attr) {
1489 desired_len += copy;
1490 if (out) {
1491 memcpy(out, iedata, min(bufsize, copy));
1492 out += min(bufsize, copy);
1493 bufsize -= min(bufsize, copy);
1494 }
1495
1496
1497 if (copy == attr_remaining)
1498 return desired_len;
1499 }
1500
1501 attr_remaining -= copy;
1502 if (attr_remaining)
1503 goto cont;
1504
1505 iedatalen -= copy;
1506 iedata += copy;
1507
1508 while (iedatalen > 0) {
1509 u16 attr_len;
1510
1511 /* P2P attribute ID & size must fit */
1512 if (iedatalen < 3)
1513 return -EILSEQ;
1514 desired_attr = iedata[0] == attr;
1515 attr_len = get_unaligned_le16(iedata + 1);
1516 iedatalen -= 3;
1517 iedata += 3;
1518
1519 copy = min_t(unsigned int, attr_len, iedatalen);
1520
1521 if (desired_attr) {
1522 desired_len += copy;
1523 if (out) {
1524 memcpy(out, iedata, min(bufsize, copy));
1525 out += min(bufsize, copy);
1526 bufsize -= min(bufsize, copy);
1527 }
1528
1529 if (copy == attr_len)
1530 return desired_len;
1531 }
1532
1533 iedata += copy;
1534 iedatalen -= copy;
1535 attr_remaining = attr_len - copy;
1536 }
1537
1538 cont:
1539 len -= ies[1] + 2;
1540 ies += ies[1] + 2;
1541 }
1542
1543 if (attr_remaining && desired_attr)
1544 return -EILSEQ;
1545
1546 return -ENOENT;
1547}
1548EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1549
2512b1b1 1550static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext)
29464ccc
JB		 1551{
1552 int i;
1553
2512b1b1
LK		 1554 /* Make sure array values are legal */
1555 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION))
1556 return false;
1557
1558 i = 0;
1559 while (i < n_ids) {
1560 if (ids[i] == WLAN_EID_EXTENSION) {
1561 if (id_ext && (ids[i + 1] == id))
1562 return true;
1563
1564 i += 2;
1565 continue;
1566 }
1567
1568 if (ids[i] == id && !id_ext)
29464ccc 1569 return true;
2512b1b1
LK		 1570
1571 i++;
1572 }
29464ccc
JB		 1573 return false;
1574}
1575
8ac63448
JB		 1576static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1577{
1578 /* we assume a validly formed IEs buffer */
1579 u8 len = ies[pos + 1];
1580
1581 pos += 2 + len;
1582
1583 /* the IE itself must have 255 bytes for fragments to follow */
1584 if (len < 255)
1585 return pos;
1586
1587 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1588 len = ies[pos + 1];
1589 pos += 2 + len;
1590 }
1591
1592 return pos;
1593}
1594
29464ccc
JB		 1595size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1596 const u8 *ids, int n_ids,
1597 const u8 *after_ric, int n_after_ric,
1598 size_t offset)
1599{
1600 size_t pos = offset;
1601
2512b1b1
LK		 1602 while (pos < ielen) {
1603 u8 ext = 0;
1604
1605 if (ies[pos] == WLAN_EID_EXTENSION)
1606 ext = 2;
1607 if ((pos + ext) >= ielen)
1608 break;
1609
1610 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext],
1611 ies[pos] == WLAN_EID_EXTENSION))
1612 break;
1613
29464ccc 1614 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
8ac63448 1615 pos = skip_ie(ies, ielen, pos);
29464ccc 1616
2512b1b1
LK		 1617 while (pos < ielen) {
1618 if (ies[pos] == WLAN_EID_EXTENSION)
1619 ext = 2;
1620 else
1621 ext = 0;
1622
1623 if ((pos + ext) >= ielen)
1624 break;
1625
1626 if (!ieee80211_id_in_list(after_ric,
1627 n_after_ric,
1628 ies[pos + ext],
1629 ext == 2))
1630 pos = skip_ie(ies, ielen, pos);
312ca38d
JM		 1631 else
1632 break;
2512b1b1 1633 }
29464ccc 1634 } else {
8ac63448 1635 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1636 }
1637 }
1638
1639 return pos;
1640}
1641EXPORT_SYMBOL(ieee80211_ie_split_ric);
1642
1ce3e82b 1643bool ieee80211_operating_class_to_band(u8 operating_class,
57fbcce3 1644 enum nl80211_band *band)
1ce3e82b
JB		 1645{
1646 switch (operating_class) {
1647 case 112:
1648 case 115 ... 127:
954a86ef 1649 case 128 ... 130:
57fbcce3 1650 *band = NL80211_BAND_5GHZ;
1ce3e82b 1651 return true;
852f0462
AS		 1652 case 131 ... 135:
1653 *band = NL80211_BAND_6GHZ;
1654 return true;
1ce3e82b
JB		 1655 case 81:
1656 case 82:
1657 case 83:
1658 case 84:
57fbcce3 1659 *band = NL80211_BAND_2GHZ;
1ce3e82b 1660 return true;
55300a13 1661 case 180:
57fbcce3 1662 *band = NL80211_BAND_60GHZ;
55300a13 1663 return true;
1ce3e82b
JB		 1664 }
1665
1666 return false;
1667}
1668EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1669
a38700dd
AN		 1670bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1671 u8 *op_class)
1672{
1673 u8 vht_opclass;
8442938c 1674 u32 freq = chandef->center_freq1;
a38700dd
AN		 1675
1676 if (freq >= 2412 && freq <= 2472) {
1677 if (chandef->width > NL80211_CHAN_WIDTH_40)
1678 return false;
1679
1680 /* 2.407 GHz, channels 1..13 */
1681 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1682 if (freq > chandef->chan->center_freq)
1683 *op_class = 83; /* HT40+ */
1684 else
1685 *op_class = 84; /* HT40- */
1686 } else {
1687 *op_class = 81;
1688 }
1689
1690 return true;
1691 }
1692
1693 if (freq == 2484) {
ec649fed
MH		 1694 /* channel 14 is only for IEEE 802.11b */
1695 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
a38700dd
AN		 1696 return false;
1697
1698 *op_class = 82; /* channel 14 */
1699 return true;
1700 }
1701
1702 switch (chandef->width) {
1703 case NL80211_CHAN_WIDTH_80:
1704 vht_opclass = 128;
1705 break;
1706 case NL80211_CHAN_WIDTH_160:
1707 vht_opclass = 129;
1708 break;
1709 case NL80211_CHAN_WIDTH_80P80:
1710 vht_opclass = 130;
1711 break;
1712 case NL80211_CHAN_WIDTH_10:
1713 case NL80211_CHAN_WIDTH_5:
1714 return false; /* unsupported for now */
1715 default:
1716 vht_opclass = 0;
1717 break;
1718 }
1719
1720 /* 5 GHz, channels 36..48 */
1721 if (freq >= 5180 && freq <= 5240) {
1722 if (vht_opclass) {
1723 *op_class = vht_opclass;
1724 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1725 if (freq > chandef->chan->center_freq)
1726 *op_class = 116;
1727 else
1728 *op_class = 117;
1729 } else {
1730 *op_class = 115;
1731 }
1732
1733 return true;
1734 }
1735
1736 /* 5 GHz, channels 52..64 */
1737 if (freq >= 5260 && freq <= 5320) {
1738 if (vht_opclass) {
1739 *op_class = vht_opclass;
1740 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1741 if (freq > chandef->chan->center_freq)
1742 *op_class = 119;
1743 else
1744 *op_class = 120;
1745 } else {
1746 *op_class = 118;
1747 }
1748
1749 return true;
1750 }
1751
1752 /* 5 GHz, channels 100..144 */
1753 if (freq >= 5500 && freq <= 5720) {
1754 if (vht_opclass) {
1755 *op_class = vht_opclass;
1756 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1757 if (freq > chandef->chan->center_freq)
1758 *op_class = 122;
1759 else
1760 *op_class = 123;
1761 } else {
1762 *op_class = 121;
1763 }
1764
1765 return true;
1766 }
1767
1768 /* 5 GHz, channels 149..169 */
1769 if (freq >= 5745 && freq <= 5845) {
1770 if (vht_opclass) {
1771 *op_class = vht_opclass;
1772 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1773 if (freq > chandef->chan->center_freq)
1774 *op_class = 126;
1775 else
1776 *op_class = 127;
1777 } else if (freq <= 5805) {
1778 *op_class = 124;
1779 } else {
1780 *op_class = 125;
1781 }
1782
1783 return true;
1784 }
1785
1786 /* 56.16 GHz, channel 1..4 */
9cf0a0b4 1787 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) {
a38700dd
AN		 1788 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1789 return false;
1790
1791 *op_class = 180;
1792 return true;
1793 }
1794
1795 /* not supported yet */
1796 return false;
1797}
1798EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1799
4c8dea63
JB		 1800static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1801 u32 *beacon_int_gcd,
1802 bool *beacon_int_different)
56d1893d
JB		 1803{
1804 struct wireless_dev *wdev;
56d1893d 1805
4c8dea63
JB		 1806 *beacon_int_gcd = 0;
1807 *beacon_int_different = false;
56d1893d 1808
4c8dea63 1809 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
56d1893d
JB		 1810 if (!wdev->beacon_interval)
1811 continue;
0c317a02 1812
4c8dea63
JB		 1813 if (!*beacon_int_gcd) {
1814 *beacon_int_gcd = wdev->beacon_interval;
0c317a02 1815 continue;
4c8dea63 1816 }
0c317a02 1817
4c8dea63 1818 if (wdev->beacon_interval == *beacon_int_gcd)
0c317a02
PK		 1819 continue;
1820
4c8dea63
JB		 1821 *beacon_int_different = true;
1822 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1823 }
0c317a02 1824
4c8dea63
JB		 1825 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1826 if (*beacon_int_gcd)
1827 *beacon_int_different = true;
1828 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
56d1893d 1829 }
4c8dea63 1830}
56d1893d 1831
4c8dea63
JB		 1832int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1833 enum nl80211_iftype iftype, u32 beacon_int)
1834{
1835 /*
1836 * This is just a basic pre-condition check; if interface combinations
1837 * are possible the driver must already be checking those with a call
1838 * to cfg80211_check_combinations(), in which case we'll validate more
1839 * through the cfg80211_calculate_bi_data() call and code in
1840 * cfg80211_iter_combinations().
1841 */
1842
1843 if (beacon_int < 10 || beacon_int > 10000)
1844 return -EINVAL;
1845
1846 return 0;
56d1893d 1847}
7527a782 1848
65a124dd 1849int cfg80211_iter_combinations(struct wiphy *wiphy,
e227300c 1850 struct iface_combination_params *params,
65a124dd
MK		 1851 void (*iter)(const struct ieee80211_iface_combination *c,
1852 void *data),
1853 void *data)
cb2d956d 1854{
8c48b50a
FF		 1855 const struct ieee80211_regdomain *regdom;
1856 enum nl80211_dfs_regions region = 0;
cb2d956d
LC		 1857 int i, j, iftype;
1858 int num_interfaces = 0;
1859 u32 used_iftypes = 0;
4c8dea63
JB		 1860 u32 beacon_int_gcd;
1861 bool beacon_int_different;
1862
1863 /*
1864 * This is a bit strange, since the iteration used to rely only on
1865 * the data given by the driver, but here it now relies on context,
1866 * in form of the currently operating interfaces.
1867 * This is OK for all current users, and saves us from having to
1868 * push the GCD calculations into all the drivers.
1869 * In the future, this should probably rely more on data that's in
1870 * cfg80211 already - the only thing not would appear to be any new
1871 * interfaces (while being brought up) and channel/radar data.
1872 */
1873 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1874 &beacon_int_gcd, &beacon_int_different);
cb2d956d 1875
e227300c 1876 if (params->radar_detect) {
8c48b50a
FF		 1877 rcu_read_lock();
1878 regdom = rcu_dereference(cfg80211_regdomain);
1879 if (regdom)
1880 region = regdom->dfs_region;
1881 rcu_read_unlock();
1882 }
1883
cb2d956d 1884 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
e227300c
PK		 1885 num_interfaces += params->iftype_num[iftype];
1886 if (params->iftype_num[iftype] > 0 &&
e6f40511 1887 !cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
cb2d956d
LC		 1888 used_iftypes |= BIT(iftype);
1889 }
1890
1891 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1892 const struct ieee80211_iface_combination *c;
1893 struct ieee80211_iface_limit *limits;
1894 u32 all_iftypes = 0;
1895
1896 c = &wiphy->iface_combinations[i];
1897
1898 if (num_interfaces > c->max_interfaces)
1899 continue;
e227300c 1900 if (params->num_different_channels > c->num_different_channels)
cb2d956d
LC		 1901 continue;
1902
1903 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1904 GFP_KERNEL);
1905 if (!limits)
1906 return -ENOMEM;
1907
1908 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
e6f40511 1909 if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
cb2d956d
LC		 1910 continue;
1911 for (j = 0; j < c->n_limits; j++) {
1912 all_iftypes |= limits[j].types;
1913 if (!(limits[j].types & BIT(iftype)))
1914 continue;
e227300c 1915 if (limits[j].max < params->iftype_num[iftype])
cb2d956d 1916 goto cont;
e227300c 1917 limits[j].max -= params->iftype_num[iftype];
cb2d956d
LC		 1918 }
1919 }
1920
e227300c
PK		 1921 if (params->radar_detect !=
1922 (c->radar_detect_widths & params->radar_detect))
cb2d956d
LC		 1923 goto cont;
1924
e227300c 1925 if (params->radar_detect && c->radar_detect_regions &&
8c48b50a
FF		 1926 !(c->radar_detect_regions & BIT(region)))
1927 goto cont;
1928
cb2d956d
LC		 1929 /* Finally check that all iftypes that we're currently
1930 * using are actually part of this combination. If they
1931 * aren't then we can't use this combination and have
1932 * to continue to the next.
1933 */
1934 if ((all_iftypes & used_iftypes) != used_iftypes)
1935 goto cont;
1936
4c8dea63 1937 if (beacon_int_gcd) {
0c317a02 1938 if (c->beacon_int_min_gcd &&
4c8dea63 1939 beacon_int_gcd < c->beacon_int_min_gcd)
0507a3ac 1940 goto cont;
4c8dea63 1941 if (!c->beacon_int_min_gcd && beacon_int_different)
0c317a02
PK		 1942 goto cont;
1943 }
1944
cb2d956d
LC		 1945 /* This combination covered all interface types and
1946 * supported the requested numbers, so we're good.
1947 */
65a124dd
MK		 1948
1949 (*iter)(c, data);
cb2d956d
LC		 1950 cont:
1951 kfree(limits);
1952 }
1953
65a124dd
MK		 1954 return 0;
1955}
1956EXPORT_SYMBOL(cfg80211_iter_combinations);
1957
1958static void
1959cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1960 void *data)
1961{
1962 int *num = data;
1963 (*num)++;
1964}
1965
1966int cfg80211_check_combinations(struct wiphy *wiphy,
e227300c 1967 struct iface_combination_params *params)
65a124dd
MK		 1968{
1969 int err, num = 0;
1970
e227300c 1971 err = cfg80211_iter_combinations(wiphy, params,
65a124dd
MK		 1972 cfg80211_iter_sum_ifcombs, &num);
1973 if (err)
1974 return err;
1975 if (num == 0)
1976 return -EBUSY;
1977
1978 return 0;
cb2d956d
LC		 1979}
1980EXPORT_SYMBOL(cfg80211_check_combinations);
1981
34850ab2
JB		 1982int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1983 const u8 *rates, unsigned int n_rates,
1984 u32 *mask)
1985{
1986 int i, j;
1987
a401d2bb
JB		 1988 if (!sband)
1989 return -EINVAL;
1990
34850ab2
JB		 1991 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1992 return -EINVAL;
1993
1994 *mask = 0;
1995
1996 for (i = 0; i < n_rates; i++) {
1997 int rate = (rates[i] & 0x7f) * 5;
1998 bool found = false;
1999
2000 for (j = 0; j < sband->n_bitrates; j++) {
2001 if (sband->bitrates[j].bitrate == rate) {
2002 found = true;
2003 *mask |= BIT(j);
2004 break;
2005 }
2006 }
2007 if (!found)
2008 return -EINVAL;
2009 }
2010
2011 /*
2012 * mask must have at least one bit set here since we
2013 * didn't accept a 0-length rates array nor allowed
2014 * entries in the array that didn't exist
2015 */
2016
2017 return 0;
2018}
11a2a357 2019
bdfbec2d
IP		 2020unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
2021{
57fbcce3 2022 enum nl80211_band band;
bdfbec2d
IP		 2023 unsigned int n_channels = 0;
2024
57fbcce3 2025 for (band = 0; band < NUM_NL80211_BANDS; band++)
bdfbec2d
IP		 2026 if (wiphy->bands[band])
2027 n_channels += wiphy->bands[band]->n_channels;
2028
2029 return n_channels;
2030}
2031EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
2032
7406353d
AQ		 2033int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
2034 struct station_info *sinfo)
2035{
2036 struct cfg80211_registered_device *rdev;
2037 struct wireless_dev *wdev;
2038
2039 wdev = dev->ieee80211_ptr;
2040 if (!wdev)
2041 return -EOPNOTSUPP;
2042
2043 rdev = wiphy_to_rdev(wdev->wiphy);
2044 if (!rdev->ops->get_station)
2045 return -EOPNOTSUPP;
2046
3c12d048
SE		 2047 memset(sinfo, 0, sizeof(*sinfo));
2048
7406353d
AQ		 2049 return rdev_get_station(rdev, dev, mac_addr, sinfo);
2050}
2051EXPORT_SYMBOL(cfg80211_get_station);
2052
a442b761
AB		 2053void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
2054{
2055 int i;
2056
2057 if (!f)
2058 return;
2059
2060 kfree(f->serv_spec_info);
2061 kfree(f->srf_bf);
2062 kfree(f->srf_macs);
2063 for (i = 0; i < f->num_rx_filters; i++)
2064 kfree(f->rx_filters[i].filter);
2065
2066 for (i = 0; i < f->num_tx_filters; i++)
2067 kfree(f->tx_filters[i].filter);
2068
2069 kfree(f->rx_filters);
2070 kfree(f->tx_filters);
2071 kfree(f);
2072}
2073EXPORT_SYMBOL(cfg80211_free_nan_func);
2074
4787cfa0
RM		 2075bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
2076 u32 center_freq_khz, u32 bw_khz)
2077{
2078 u32 start_freq_khz, end_freq_khz;
2079
2080 start_freq_khz = center_freq_khz - (bw_khz / 2);
2081 end_freq_khz = center_freq_khz + (bw_khz / 2);
2082
2083 if (start_freq_khz >= freq_range->start_freq_khz &&
2084 end_freq_khz <= freq_range->end_freq_khz)
2085 return true;
2086
2087 return false;
2088}
2089
8689c051
AS		 2090int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp)
2091{
1d211d43
JB		 2092 sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1,
2093 sizeof(*(sinfo->pertid)),
2094 gfp);
8689c051
AS		 2095 if (!sinfo->pertid)
2096 return -ENOMEM;
2097
2098 return 0;
2099}
2100EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats);
2101
11a2a357
JB		 2102/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
2103/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
2104const unsigned char rfc1042_header[] __aligned(2) =
2105 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2106EXPORT_SYMBOL(rfc1042_header);
2107
2108/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
2109const unsigned char bridge_tunnel_header[] __aligned(2) =
2110 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
2111EXPORT_SYMBOL(bridge_tunnel_header);
30ca1aa5
DL		 2112
2113/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
2114struct iapp_layer2_update {
2115 u8 da[ETH_ALEN]; /* broadcast */
2116 u8 sa[ETH_ALEN]; /* STA addr */
2117 __be16 len; /* 6 */
2118 u8 dsap; /* 0 */
2119 u8 ssap; /* 0 */
2120 u8 control;
2121 u8 xid_info[3];
2122} __packed;
2123
2124void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr)
2125{
2126 struct iapp_layer2_update *msg;
2127 struct sk_buff *skb;
2128
2129 /* Send Level 2 Update Frame to update forwarding tables in layer 2
2130 * bridge devices */
2131
2132 skb = dev_alloc_skb(sizeof(*msg));
2133 if (!skb)
2134 return;
2135 msg = skb_put(skb, sizeof(*msg));
2136
2137 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
2138 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
2139
2140 eth_broadcast_addr(msg->da);
2141 ether_addr_copy(msg->sa, addr);
2142 msg->len = htons(6);
2143 msg->dsap = 0;
2144 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
2145 msg->control = 0xaf; /* XID response lsb.1111F101.
2146 * F=0 (no poll command; unsolicited frame) */
2147 msg->xid_info[0] = 0x81; /* XID format identifier */
2148 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
2149 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
2150
2151 skb->dev = dev;
2152 skb->protocol = eth_type_trans(skb, dev);
2153 memset(skb->cb, 0, sizeof(skb->cb));
2154 netif_rx_ni(skb);
2155}
2156EXPORT_SYMBOL(cfg80211_send_layer2_update);
b0aa75f0
JB		 2157
2158int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
2159 enum ieee80211_vht_chanwidth bw,
9166cc49
JB		 2160 int mcs, bool ext_nss_bw_capable,
2161 unsigned int max_vht_nss)
b0aa75f0
JB		 2162{
2163 u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map);
b0aa75f0
JB		 2164 int ext_nss_bw;
2165 int supp_width;
2166 int i, mcs_encoding;
2167
2168 if (map == 0xffff)
2169 return 0;
2170
9166cc49 2171 if (WARN_ON(mcs > 9 || max_vht_nss > 8))
b0aa75f0
JB		 2172 return 0;
2173 if (mcs <= 7)
2174 mcs_encoding = 0;
2175 else if (mcs == 8)
2176 mcs_encoding = 1;
2177 else
2178 mcs_encoding = 2;
2179
9166cc49
JB		 2180 if (!max_vht_nss) {
2181 /* find max_vht_nss for the given MCS */
2182 for (i = 7; i >= 0; i--) {
2183 int supp = (map >> (2 * i)) & 3;
b0aa75f0 2184
9166cc49
JB		 2185 if (supp == 3)
2186 continue;
b0aa75f0 2187
9166cc49
JB		 2188 if (supp >= mcs_encoding) {
2189 max_vht_nss = i + 1;
2190 break;
2191 }
b0aa75f0
JB		 2192 }
2193 }
2194
2195 if (!(cap->supp_mcs.tx_mcs_map &
2196 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
2197 return max_vht_nss;
2198
2199 ext_nss_bw = le32_get_bits(cap->vht_cap_info,
2200 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2201 supp_width = le32_get_bits(cap->vht_cap_info,
2202 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2203
2204 /* if not capable, treat ext_nss_bw as 0 */
2205 if (!ext_nss_bw_capable)
2206 ext_nss_bw = 0;
2207
2208 /* This is invalid */
2209 if (supp_width == 3)
2210 return 0;
2211
2212 /* This is an invalid combination so pretend nothing is supported */
2213 if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2))
2214 return 0;
2215
2216 /*
2217 * Cover all the special cases according to IEEE 802.11-2016
2218 * Table 9-250. All other cases are either factor of 1 or not
2219 * valid/supported.
2220 */
2221 switch (bw) {
2222 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2223 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2224 if ((supp_width == 1 || supp_width == 2) &&
2225 ext_nss_bw == 3)
2226 return 2 * max_vht_nss;
2227 break;
2228 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2229 if (supp_width == 0 &&
2230 (ext_nss_bw == 1 || ext_nss_bw == 2))
93bc8ac4 2231 return max_vht_nss / 2;
b0aa75f0
JB		 2232 if (supp_width == 0 &&
2233 ext_nss_bw == 3)
93bc8ac4 2234 return (3 * max_vht_nss) / 4;
b0aa75f0
JB		 2235 if (supp_width == 1 &&
2236 ext_nss_bw == 3)
2237 return 2 * max_vht_nss;
2238 break;
2239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
93bc8ac4 2240 if (supp_width == 0 && ext_nss_bw == 1)
b0aa75f0
JB		 2241 return 0; /* not possible */
2242 if (supp_width == 0 &&
2243 ext_nss_bw == 2)
93bc8ac4 2244 return max_vht_nss / 2;
b0aa75f0
JB		 2245 if (supp_width == 0 &&
2246 ext_nss_bw == 3)
93bc8ac4 2247 return (3 * max_vht_nss) / 4;
b0aa75f0
JB		 2248 if (supp_width == 1 &&
2249 ext_nss_bw == 0)
2250 return 0; /* not possible */
2251 if (supp_width == 1 &&
2252 ext_nss_bw == 1)
93bc8ac4 2253 return max_vht_nss / 2;
b0aa75f0
JB		 2254 if (supp_width == 1 &&
2255 ext_nss_bw == 2)
93bc8ac4 2256 return (3 * max_vht_nss) / 4;
b0aa75f0
JB		 2257 break;
2258 }
2259
2260 /* not covered or invalid combination received */
2261 return max_vht_nss;
2262}
2263EXPORT_SYMBOL(ieee80211_get_vht_max_nss);
e6f40511
MP		 2264
2265bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
2266 bool is_4addr, u8 check_swif)
2267
2268{
2269 bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN;
2270
2271 switch (check_swif) {
2272 case 0:
2273 if (is_vlan && is_4addr)
2274 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
2275 return wiphy->interface_modes & BIT(iftype);
2276 case 1:
2277 if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan)
2278 return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
2279 return wiphy->software_iftypes & BIT(iftype);
2280 default:
2281 break;
2282 }
2283
2284 return false;
2285}
2286EXPORT_SYMBOL(cfg80211_iftype_allowed);
Linux 6.x block layer and io_uring tree(s)