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cfg80211: prevent speculation on cfg80211_classify8021d() return
[mirror_ubuntu-bionic-kernel.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
55a76bfa 7 * Copyright (C) 2018-2019 Intel Corporation
8318d78a 8 */
bc3b2d7f 9#include <linux/export.h>
d3236553 10#include <linux/bitops.h>
e31a16d6 11#include <linux/etherdevice.h>
5a0e3ad6 12#include <linux/slab.h>
d3236553 13#include <net/cfg80211.h>
e31a16d6 14#include <net/ip.h>
b156579b 15#include <net/dsfield.h>
c6ca5e28 16#include <linux/if_vlan.h>
960d97f9 17#include <linux/mpls.h>
4c8dea63 18#include <linux/gcd.h>
55a76bfa 19#include <linux/nospec.h>
8318d78a 20#include "core.h"
e35e4d28
HG		 21#include "rdev-ops.h"
22
8318d78a 23
bd815252
JB		 24struct ieee80211_rate *
25ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
881d948c 26 u32 basic_rates, int bitrate)
bd815252
JB		 27{
28 struct ieee80211_rate *result = &sband->bitrates[0];
29 int i;
30
31 for (i = 0; i < sband->n_bitrates; i++) {
32 if (!(basic_rates & BIT(i)))
33 continue;
34 if (sband->bitrates[i].bitrate > bitrate)
35 continue;
36 result = &sband->bitrates[i];
37 }
38
39 return result;
40}
41EXPORT_SYMBOL(ieee80211_get_response_rate);
42
74608aca
SW		 43u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
44 enum nl80211_bss_scan_width scan_width)
b422c6cd
AN		 45{
46 struct ieee80211_rate *bitrates;
47 u32 mandatory_rates = 0;
48 enum ieee80211_rate_flags mandatory_flag;
49 int i;
50
51 if (WARN_ON(!sband))
52 return 1;
53
57fbcce3 54 if (sband->band == NL80211_BAND_2GHZ) {
74608aca
SW		 55 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
56 scan_width == NL80211_BSS_CHAN_WIDTH_10)
57 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
58 else
59 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
60 } else {
b422c6cd 61 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
74608aca 62 }
b422c6cd
AN		 63
64 bitrates = sband->bitrates;
65 for (i = 0; i < sband->n_bitrates; i++)
66 if (bitrates[i].flags & mandatory_flag)
67 mandatory_rates |= BIT(i);
68 return mandatory_rates;
69}
70EXPORT_SYMBOL(ieee80211_mandatory_rates);
71
57fbcce3 72int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
8318d78a 73{
59eb21a6
BR		 74 /* see 802.11 17.3.8.3.2 and Annex J
75 * there are overlapping channel numbers in 5GHz and 2GHz bands */
3a0c52a6
VK		 76 if (chan <= 0)
77 return 0; /* not supported */
78 switch (band) {
57fbcce3 79 case NL80211_BAND_2GHZ:
59eb21a6
BR		 80 if (chan == 14)
81 return 2484;
82 else if (chan < 14)
83 return 2407 + chan * 5;
3a0c52a6 84 break;
57fbcce3 85 case NL80211_BAND_5GHZ:
3a0c52a6
VK		 86 if (chan >= 182 && chan <= 196)
87 return 4000 + chan * 5;
59eb21a6 88 else
3a0c52a6
VK		 89 return 5000 + chan * 5;
90 break;
57fbcce3 91 case NL80211_BAND_60GHZ:
3a0c52a6
VK		 92 if (chan < 5)
93 return 56160 + chan * 2160;
94 break;
95 default:
96 ;
59eb21a6 97 }
3a0c52a6 98 return 0; /* not supported */
8318d78a
JB		 99}
100EXPORT_SYMBOL(ieee80211_channel_to_frequency);
101
102int ieee80211_frequency_to_channel(int freq)
103{
59eb21a6 104 /* see 802.11 17.3.8.3.2 and Annex J */
8318d78a
JB		 105 if (freq == 2484)
106 return 14;
59eb21a6 107 else if (freq < 2484)
8318d78a 108 return (freq - 2407) / 5;
59eb21a6
BR		 109 else if (freq >= 4910 && freq <= 4980)
110 return (freq - 4000) / 5;
3a0c52a6 111 else if (freq <= 45000) /* DMG band lower limit */
59eb21a6 112 return (freq - 5000) / 5;
3a0c52a6
VK		 113 else if (freq >= 58320 && freq <= 64800)
114 return (freq - 56160) / 2160;
115 else
116 return 0;
8318d78a
JB		 117}
118EXPORT_SYMBOL(ieee80211_frequency_to_channel);
119
543b921b 120struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq)
906c730a 121{
57fbcce3 122 enum nl80211_band band;
906c730a
JB		 123 struct ieee80211_supported_band *sband;
124 int i;
125
57fbcce3 126 for (band = 0; band < NUM_NL80211_BANDS; band++) {
906c730a
JB		 127 sband = wiphy->bands[band];
128
129 if (!sband)
130 continue;
131
132 for (i = 0; i < sband->n_channels; i++) {
133 if (sband->channels[i].center_freq == freq)
134 return &sband->channels[i];
135 }
136 }
137
138 return NULL;
139}
543b921b 140EXPORT_SYMBOL(ieee80211_get_channel);
906c730a 141
343884c8 142static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
8318d78a
JB		 143{
144 int i, want;
145
343884c8 146 switch (sband->band) {
57fbcce3 147 case NL80211_BAND_5GHZ:
8318d78a
JB		 148 want = 3;
149 for (i = 0; i < sband->n_bitrates; i++) {
150 if (sband->bitrates[i].bitrate == 60 ||
151 sband->bitrates[i].bitrate == 120 ||
152 sband->bitrates[i].bitrate == 240) {
153 sband->bitrates[i].flags |=
154 IEEE80211_RATE_MANDATORY_A;
155 want--;
156 }
157 }
158 WARN_ON(want);
159 break;
57fbcce3 160 case NL80211_BAND_2GHZ:
8318d78a
JB		 161 want = 7;
162 for (i = 0; i < sband->n_bitrates; i++) {
1bd773c0
RS		 163 switch (sband->bitrates[i].bitrate) {
164 case 10:
165 case 20:
166 case 55:
167 case 110:
8318d78a
JB		 168 sband->bitrates[i].flags |=
169 IEEE80211_RATE_MANDATORY_B |
170 IEEE80211_RATE_MANDATORY_G;
171 want--;
1bd773c0
RS		 172 break;
173 case 60:
174 case 120:
175 case 240:
8318d78a
JB		 176 sband->bitrates[i].flags |=
177 IEEE80211_RATE_MANDATORY_G;
178 want--;
1bd773c0
RS		 179 /* fall through */
180 default:
8318d78a
JB		 181 sband->bitrates[i].flags |=
182 IEEE80211_RATE_ERP_G;
1bd773c0
RS		 183 break;
184 }
8318d78a 185 }
1bd773c0 186 WARN_ON(want != 0 && want != 3);
8318d78a 187 break;
57fbcce3 188 case NL80211_BAND_60GHZ:
3a0c52a6
VK		 189 /* check for mandatory HT MCS 1..4 */
190 WARN_ON(!sband->ht_cap.ht_supported);
191 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
192 break;
57fbcce3 193 case NUM_NL80211_BANDS:
343884c8 194 default:
8318d78a
JB		 195 WARN_ON(1);
196 break;
197 }
198}
199
200void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
201{
57fbcce3 202 enum nl80211_band band;
8318d78a 203
57fbcce3 204 for (band = 0; band < NUM_NL80211_BANDS; band++)
8318d78a 205 if (wiphy->bands[band])
343884c8 206 set_mandatory_flags_band(wiphy->bands[band]);
8318d78a 207}
08645126 208
38ba3c57
JM		 209bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
210{
211 int i;
212 for (i = 0; i < wiphy->n_cipher_suites; i++)
213 if (cipher == wiphy->cipher_suites[i])
214 return true;
215 return false;
216}
217
fffd0934
JB		 218int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
219 struct key_params *params, int key_idx,
e31b8213 220 bool pairwise, const u8 *mac_addr)
08645126 221{
e9c8f8d3 222 if (key_idx < 0 || key_idx > 5)
08645126
JB		 223 return -EINVAL;
224
e31b8213
JB		 225 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
226 return -EINVAL;
227
228 if (pairwise && !mac_addr)
229 return -EINVAL;
230
37720569
JM		 231 switch (params->cipher) {
232 case WLAN_CIPHER_SUITE_TKIP:
233 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 234 case WLAN_CIPHER_SUITE_CCMP_256:
235 case WLAN_CIPHER_SUITE_GCMP:
236 case WLAN_CIPHER_SUITE_GCMP_256:
37720569
JM		 237 /* Disallow pairwise keys with non-zero index unless it's WEP
238 * or a vendor specific cipher (because current deployments use
239 * pairwise WEP keys with non-zero indices and for vendor
240 * specific ciphers this should be validated in the driver or
241 * hardware level - but 802.11i clearly specifies to use zero)
242 */
243 if (pairwise && key_idx)
244 return -EINVAL;
245 break;
246 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 247 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
248 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
249 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
37720569
JM		 250 /* Disallow BIP (group-only) cipher as pairwise cipher */
251 if (pairwise)
252 return -EINVAL;
e9c8f8d3
JB		 253 if (key_idx < 4)
254 return -EINVAL;
37720569 255 break;
e9c8f8d3
JB		 256 case WLAN_CIPHER_SUITE_WEP40:
257 case WLAN_CIPHER_SUITE_WEP104:
258 if (key_idx > 3)
259 return -EINVAL;
37720569
JM		 260 default:
261 break;
262 }
08645126 263
08645126
JB		 264 switch (params->cipher) {
265 case WLAN_CIPHER_SUITE_WEP40:
8fc0fee0 266 if (params->key_len != WLAN_KEY_LEN_WEP40)
08645126
JB		 267 return -EINVAL;
268 break;
269 case WLAN_CIPHER_SUITE_TKIP:
8fc0fee0 270 if (params->key_len != WLAN_KEY_LEN_TKIP)
08645126
JB		 271 return -EINVAL;
272 break;
273 case WLAN_CIPHER_SUITE_CCMP:
8fc0fee0 274 if (params->key_len != WLAN_KEY_LEN_CCMP)
08645126
JB		 275 return -EINVAL;
276 break;
cfcf1682
JM		 277 case WLAN_CIPHER_SUITE_CCMP_256:
278 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
279 return -EINVAL;
280 break;
281 case WLAN_CIPHER_SUITE_GCMP:
282 if (params->key_len != WLAN_KEY_LEN_GCMP)
283 return -EINVAL;
284 break;
285 case WLAN_CIPHER_SUITE_GCMP_256:
286 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
287 return -EINVAL;
288 break;
08645126 289 case WLAN_CIPHER_SUITE_WEP104:
8fc0fee0 290 if (params->key_len != WLAN_KEY_LEN_WEP104)
08645126
JB		 291 return -EINVAL;
292 break;
293 case WLAN_CIPHER_SUITE_AES_CMAC:
8fc0fee0 294 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
08645126
JB		 295 return -EINVAL;
296 break;
cfcf1682
JM		 297 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
298 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
299 return -EINVAL;
300 break;
301 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
302 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
303 return -EINVAL;
304 break;
305 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
306 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
307 return -EINVAL;
308 break;
08645126 309 default:
7d64b7cc
JB		 310 /*
311 * We don't know anything about this algorithm,
312 * allow using it -- but the driver must check
313 * all parameters! We still check below whether
314 * or not the driver supports this algorithm,
315 * of course.
316 */
317 break;
08645126
JB		 318 }
319
9f26a952
JM		 320 if (params->seq) {
321 switch (params->cipher) {
322 case WLAN_CIPHER_SUITE_WEP40:
323 case WLAN_CIPHER_SUITE_WEP104:
324 /* These ciphers do not use key sequence */
325 return -EINVAL;
326 case WLAN_CIPHER_SUITE_TKIP:
327 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 328 case WLAN_CIPHER_SUITE_CCMP_256:
329 case WLAN_CIPHER_SUITE_GCMP:
330 case WLAN_CIPHER_SUITE_GCMP_256:
9f26a952 331 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 332 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
333 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
334 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
9f26a952
JM		 335 if (params->seq_len != 6)
336 return -EINVAL;
337 break;
338 }
339 }
340
38ba3c57 341 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
fffd0934
JB		 342 return -EINVAL;
343
08645126
JB		 344 return 0;
345}
e31a16d6 346
633adf1a 347unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
e31a16d6
ZY		 348{
349 unsigned int hdrlen = 24;
350
351 if (ieee80211_is_data(fc)) {
352 if (ieee80211_has_a4(fc))
353 hdrlen = 30;
d0dd2de0 354 if (ieee80211_is_data_qos(fc)) {
e31a16d6 355 hdrlen += IEEE80211_QOS_CTL_LEN;
d0dd2de0
AT		 356 if (ieee80211_has_order(fc))
357 hdrlen += IEEE80211_HT_CTL_LEN;
358 }
e31a16d6
ZY		 359 goto out;
360 }
361
fb142f4b
FC		 362 if (ieee80211_is_mgmt(fc)) {
363 if (ieee80211_has_order(fc))
364 hdrlen += IEEE80211_HT_CTL_LEN;
365 goto out;
366 }
367
e31a16d6
ZY		 368 if (ieee80211_is_ctl(fc)) {
369 /*
370 * ACK and CTS are 10 bytes, all others 16. To see how
371 * to get this condition consider
372 * subtype mask: 0b0000000011110000 (0x00F0)
373 * ACK subtype: 0b0000000011010000 (0x00D0)
374 * CTS subtype: 0b0000000011000000 (0x00C0)
375 * bits that matter: ^^^ (0x00E0)
376 * value of those: 0b0000000011000000 (0x00C0)
377 */
378 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
379 hdrlen = 10;
380 else
381 hdrlen = 16;
382 }
383out:
384 return hdrlen;
385}
386EXPORT_SYMBOL(ieee80211_hdrlen);
387
388unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
389{
390 const struct ieee80211_hdr *hdr =
391 (const struct ieee80211_hdr *)skb->data;
392 unsigned int hdrlen;
393
394 if (unlikely(skb->len < 10))
395 return 0;
396 hdrlen = ieee80211_hdrlen(hdr->frame_control);
397 if (unlikely(hdrlen > skb->len))
398 return 0;
399 return hdrlen;
400}
401EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
402
2d1c304c 403static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
e31a16d6 404{
2d1c304c 405 int ae = flags & MESH_FLAGS_AE;
7dd111e8 406 /* 802.11-2012, 8.2.4.7.3 */
e31a16d6 407 switch (ae) {
7dd111e8 408 default:
e31a16d6
ZY		 409 case 0:
410 return 6;
3c5772a5 411 case MESH_FLAGS_AE_A4:
e31a16d6 412 return 12;
3c5772a5 413 case MESH_FLAGS_AE_A5_A6:
e31a16d6 414 return 18;
e31a16d6
ZY		 415 }
416}
2d1c304c
FF		 417
418unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
419{
420 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
421}
9b395bc3 422EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
e31a16d6 423
7f6990c8
JB		 424int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
425 const u8 *addr, enum nl80211_iftype iftype)
e31a16d6
ZY		 426{
427 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2d1c304c
FF		 428 struct {
429 u8 hdr[ETH_ALEN] __aligned(2);
430 __be16 proto;
431 } payload;
432 struct ethhdr tmp;
433 u16 hdrlen;
434 u8 mesh_flags = 0;
e31a16d6
ZY		 435
436 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
437 return -1;
438
439 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2d1c304c
FF		 440 if (skb->len < hdrlen + 8)
441 return -1;
e31a16d6
ZY		 442
443 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
444 * header
445 * IEEE 802.11 address fields:
446 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
447 * 0 0 DA SA BSSID n/a
448 * 0 1 DA BSSID SA n/a
449 * 1 0 BSSID SA DA n/a
450 * 1 1 RA TA DA SA
451 */
2d1c304c
FF		 452 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
453 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
454
455 if (iftype == NL80211_IFTYPE_MESH_POINT)
456 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
e31a16d6 457
5667c86a
RM		 458 mesh_flags &= MESH_FLAGS_AE;
459
e31a16d6
ZY		 460 switch (hdr->frame_control &
461 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
462 case cpu_to_le16(IEEE80211_FCTL_TODS):
463 if (unlikely(iftype != NL80211_IFTYPE_AP &&
074ac8df
JB		 464 iftype != NL80211_IFTYPE_AP_VLAN &&
465 iftype != NL80211_IFTYPE_P2P_GO))
e31a16d6
ZY		 466 return -1;
467 break;
468 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
469 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
f14543ee
FF		 470 iftype != NL80211_IFTYPE_MESH_POINT &&
471 iftype != NL80211_IFTYPE_AP_VLAN &&
472 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 473 return -1;
474 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 475 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f 476 return -1;
5667c86a 477 if (mesh_flags == MESH_FLAGS_AE_A5_A6) {
e3cf8b3f
ZY		 478 skb_copy_bits(skb, hdrlen +
479 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c 480 tmp.h_dest, 2 * ETH_ALEN);
e31a16d6 481 }
2d1c304c 482 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
e31a16d6
ZY		 483 }
484 break;
485 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5 486 if ((iftype != NL80211_IFTYPE_STATION &&
074ac8df
JB		 487 iftype != NL80211_IFTYPE_P2P_CLIENT &&
488 iftype != NL80211_IFTYPE_MESH_POINT) ||
2d1c304c
FF		 489 (is_multicast_ether_addr(tmp.h_dest) &&
490 ether_addr_equal(tmp.h_source, addr)))
e31a16d6 491 return -1;
3c5772a5 492 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 493 if (mesh_flags == MESH_FLAGS_AE_A5_A6)
7dd111e8 494 return -1;
5667c86a 495 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f
ZY		 496 skb_copy_bits(skb, hdrlen +
497 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c
FF		 498 tmp.h_source, ETH_ALEN);
499 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
3c5772a5 500 }
e31a16d6
ZY		 501 break;
502 case cpu_to_le16(0):
941c93cd 503 if (iftype != NL80211_IFTYPE_ADHOC &&
6e0bd6c3
RL		 504 iftype != NL80211_IFTYPE_STATION &&
505 iftype != NL80211_IFTYPE_OCB)
941c93cd 506 return -1;
e31a16d6
ZY		 507 break;
508 }
509
2d1c304c
FF		 510 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
511 tmp.h_proto = payload.proto;
e31a16d6 512
2d1c304c
FF		 513 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
514 tmp.h_proto != htons(ETH_P_AARP) &&
515 tmp.h_proto != htons(ETH_P_IPX)) ||
516 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
e31a16d6
ZY		 517 /* remove RFC1042 or Bridge-Tunnel encapsulation and
518 * replace EtherType */
2d1c304c
FF		 519 hdrlen += ETH_ALEN + 2;
520 else
c041778c 521 tmp.h_proto = htons(skb->len - hdrlen);
2d1c304c
FF		 522
523 pskb_pull(skb, hdrlen);
e31a16d6 524
2d1c304c 525 if (!ehdr)
d58ff351 526 ehdr = skb_push(skb, sizeof(struct ethhdr));
2d1c304c
FF		 527 memcpy(ehdr, &tmp, sizeof(tmp));
528
e31a16d6
ZY		 529 return 0;
530}
7f6990c8 531EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
e31a16d6 532
2b67f944
FF		 533static void
534__frame_add_frag(struct sk_buff *skb, struct page *page,
535 void *ptr, int len, int size)
536{
537 struct skb_shared_info *sh = skb_shinfo(skb);
538 int page_offset;
539
6d061f9f 540 page_ref_inc(page);
2b67f944
FF		 541 page_offset = ptr - page_address(page);
542 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
543}
544
545static void
546__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
547 int offset, int len)
548{
549 struct skb_shared_info *sh = skb_shinfo(skb);
aa1702dd 550 const skb_frag_t *frag = &sh->frags[0];
2b67f944
FF		 551 struct page *frag_page;
552 void *frag_ptr;
553 int frag_len, frag_size;
554 int head_size = skb->len - skb->data_len;
555 int cur_len;
556
557 frag_page = virt_to_head_page(skb->head);
558 frag_ptr = skb->data;
559 frag_size = head_size;
560
561 while (offset >= frag_size) {
562 offset -= frag_size;
2b67f944
FF		 563 frag_page = skb_frag_page(frag);
564 frag_ptr = skb_frag_address(frag);
565 frag_size = skb_frag_size(frag);
aa1702dd 566 frag++;
2b67f944
FF		 567 }
568
569 frag_ptr += offset;
570 frag_len = frag_size - offset;
571
572 cur_len = min(len, frag_len);
573
574 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
575 len -= cur_len;
576
577 while (len > 0) {
2b67f944
FF		 578 frag_len = skb_frag_size(frag);
579 cur_len = min(len, frag_len);
580 __frame_add_frag(frame, skb_frag_page(frag),
581 skb_frag_address(frag), cur_len, frag_len);
582 len -= cur_len;
aa1702dd 583 frag++;
2b67f944
FF		 584 }
585}
586
230fd28a
FF		 587static struct sk_buff *
588__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
2b67f944 589 int offset, int len, bool reuse_frag)
230fd28a
FF		 590{
591 struct sk_buff *frame;
2b67f944 592 int cur_len = len;
230fd28a
FF		 593
594 if (skb->len - offset < len)
595 return NULL;
596
2b67f944
FF		 597 /*
598 * When reusing framents, copy some data to the head to simplify
599 * ethernet header handling and speed up protocol header processing
600 * in the stack later.
601 */
602 if (reuse_frag)
603 cur_len = min_t(int, len, 32);
604
230fd28a
FF		 605 /*
606 * Allocate and reserve two bytes more for payload
607 * alignment since sizeof(struct ethhdr) is 14.
608 */
2b67f944 609 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
16a910a6
GG		 610 if (!frame)
611 return NULL;
230fd28a
FF		 612
613 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
2b67f944
FF		 614 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
615
616 len -= cur_len;
617 if (!len)
618 return frame;
619
620 offset += cur_len;
621 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
230fd28a
FF		 622
623 return frame;
624}
eaf85ca7
ZY		 625
626void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
627 const u8 *addr, enum nl80211_iftype iftype,
8b3becad 628 const unsigned int extra_headroom,
8b935ee2 629 const u8 *check_da, const u8 *check_sa)
eaf85ca7 630{
230fd28a 631 unsigned int hlen = ALIGN(extra_headroom, 4);
eaf85ca7
ZY		 632 struct sk_buff *frame = NULL;
633 u16 ethertype;
634 u8 *payload;
7f6990c8 635 int offset = 0, remaining;
230fd28a 636 struct ethhdr eth;
2b67f944 637 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
2bf0ccc7 638 bool reuse_skb = false;
230fd28a 639 bool last = false;
88665f5a 640
230fd28a
FF		 641 while (!last) {
642 unsigned int subframe_len;
643 int len;
eaf85ca7 644 u8 padding;
eaf85ca7 645
230fd28a
FF		 646 skb_copy_bits(skb, offset, &eth, sizeof(eth));
647 len = ntohs(eth.h_proto);
648 subframe_len = sizeof(struct ethhdr) + len;
eaf85ca7 649 padding = (4 - subframe_len) & 0x3;
230fd28a 650
eaf85ca7 651 /* the last MSDU has no padding */
230fd28a 652 remaining = skb->len - offset;
eaf85ca7
ZY		 653 if (subframe_len > remaining)
654 goto purge;
655
230fd28a 656 offset += sizeof(struct ethhdr);
230fd28a 657 last = remaining <= subframe_len + padding;
8b935ee2
JB		 658
659 /* FIXME: should we really accept multicast DA? */
660 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
661 !ether_addr_equal(check_da, eth.h_dest)) ||
662 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
663 offset += len + padding;
664 continue;
665 }
666
667 /* reuse skb for the last subframe */
2b67f944 668 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
230fd28a 669 skb_pull(skb, offset);
eaf85ca7 670 frame = skb;
230fd28a
FF		 671 reuse_skb = true;
672 } else {
2b67f944
FF		 673 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
674 reuse_frag);
eaf85ca7
ZY		 675 if (!frame)
676 goto purge;
677
230fd28a 678 offset += len + padding;
eaf85ca7
ZY		 679 }
680
681 skb_reset_network_header(frame);
682 frame->dev = skb->dev;
683 frame->priority = skb->priority;
684
685 payload = frame->data;
686 ethertype = (payload[6] << 8) | payload[7];
ac422d3c 687 if (likely((ether_addr_equal(payload, rfc1042_header) &&
eaf85ca7 688 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
ac422d3c 689 ether_addr_equal(payload, bridge_tunnel_header))) {
230fd28a
FF		 690 eth.h_proto = htons(ethertype);
691 skb_pull(frame, ETH_ALEN + 2);
eaf85ca7 692 }
230fd28a
FF		 693
694 memcpy(skb_push(frame, sizeof(eth)), &eth, sizeof(eth));
eaf85ca7
ZY		 695 __skb_queue_tail(list, frame);
696 }
697
230fd28a
FF		 698 if (!reuse_skb)
699 dev_kfree_skb(skb);
700
eaf85ca7
ZY		 701 return;
702
703 purge:
704 __skb_queue_purge(list);
eaf85ca7
ZY		 705 dev_kfree_skb(skb);
706}
707EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
708
e31a16d6 709/* Given a data frame determine the 802.1p/1d tag to use. */
fa9ffc74
KP		 710unsigned int cfg80211_classify8021d(struct sk_buff *skb,
711 struct cfg80211_qos_map *qos_map)
e31a16d6
ZY		 712{
713 unsigned int dscp;
c6ca5e28 714 unsigned char vlan_priority;
55a76bfa 715 unsigned int ret;
e31a16d6
ZY		 716
717 /* skb->priority values from 256->263 are magic values to
718 * directly indicate a specific 802.1d priority. This is used
719 * to allow 802.1d priority to be passed directly in from VLAN
720 * tags, etc.
721 */
55a76bfa
JB		 722 if (skb->priority >= 256 && skb->priority <= 263) {
723 ret = skb->priority - 256;
724 goto out;
725 }
e31a16d6 726
df8a39de
JP		 727 if (skb_vlan_tag_present(skb)) {
728 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
c6ca5e28 729 >> VLAN_PRIO_SHIFT;
55a76bfa
JB		 730 if (vlan_priority > 0) {
731 ret = vlan_priority;
732 goto out;
733 }
c6ca5e28
V		 734 }
735
e31a16d6
ZY		 736 switch (skb->protocol) {
737 case htons(ETH_P_IP):
b156579b
DT		 738 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
739 break;
740 case htons(ETH_P_IPV6):
741 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
e31a16d6 742 break;
960d97f9
SW		 743 case htons(ETH_P_MPLS_UC):
744 case htons(ETH_P_MPLS_MC): {
745 struct mpls_label mpls_tmp, *mpls;
746
747 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
748 sizeof(*mpls), &mpls_tmp);
749 if (!mpls)
750 return 0;
751
55a76bfa 752 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
960d97f9 753 >> MPLS_LS_TC_SHIFT;
55a76bfa 754 goto out;
960d97f9
SW		 755 }
756 case htons(ETH_P_80221):
757 /* 802.21 is always network control traffic */
758 return 7;
e31a16d6
ZY		 759 default:
760 return 0;
761 }
762
fa9ffc74
KP		 763 if (qos_map) {
764 unsigned int i, tmp_dscp = dscp >> 2;
765
766 for (i = 0; i < qos_map->num_des; i++) {
55a76bfa
JB		 767 if (tmp_dscp == qos_map->dscp_exception[i].dscp) {
768 ret = qos_map->dscp_exception[i].up;
769 goto out;
770 }
fa9ffc74
KP		 771 }
772
773 for (i = 0; i < 8; i++) {
774 if (tmp_dscp >= qos_map->up[i].low &&
55a76bfa
JB		 775 tmp_dscp <= qos_map->up[i].high) {
776 ret = i;
777 goto out;
778 }
fa9ffc74
KP		 779 }
780 }
781
55a76bfa
JB		 782 ret = dscp >> 5;
783out:
784 return array_index_nospec(ret, IEEE80211_NUM_TIDS);
e31a16d6
ZY		 785}
786EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6
JB		 787
788const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
789{
9caf0364
JB		 790 const struct cfg80211_bss_ies *ies;
791
792 ies = rcu_dereference(bss->ies);
793 if (!ies)
517357c6 794 return NULL;
9caf0364
JB		 795
796 return cfg80211_find_ie(ie, ies->data, ies->len);
517357c6
JB		 797}
798EXPORT_SYMBOL(ieee80211_bss_get_ie);
fffd0934
JB		 799
800void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
801{
f26cbf40 802 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934
JB		 803 struct net_device *dev = wdev->netdev;
804 int i;
805
806 if (!wdev->connect_keys)
807 return;
808
b8676221 809 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
fffd0934
JB		 810 if (!wdev->connect_keys->params[i].cipher)
811 continue;
e35e4d28
HG		 812 if (rdev_add_key(rdev, dev, i, false, NULL,
813 &wdev->connect_keys->params[i])) {
e9c0268f 814 netdev_err(dev, "failed to set key %d\n", i);
1e056665
ZY		 815 continue;
816 }
d4f29978
JB		 817 if (wdev->connect_keys->def == i &&
818 rdev_set_default_key(rdev, dev, i, true, true)) {
819 netdev_err(dev, "failed to set defkey %d\n", i);
820 continue;
821 }
fffd0934
JB		 822 }
823
b47f610b 824 kzfree(wdev->connect_keys);
fffd0934
JB		 825 wdev->connect_keys = NULL;
826}
3d54d255 827
1f6fc43e 828void cfg80211_process_wdev_events(struct wireless_dev *wdev)
3d54d255
JB		 829{
830 struct cfg80211_event *ev;
831 unsigned long flags;
3d54d255
JB		 832
833 spin_lock_irqsave(&wdev->event_lock, flags);
834 while (!list_empty(&wdev->event_list)) {
835 ev = list_first_entry(&wdev->event_list,
836 struct cfg80211_event, list);
837 list_del(&ev->list);
838 spin_unlock_irqrestore(&wdev->event_lock, flags);
839
840 wdev_lock(wdev);
841 switch (ev->type) {
842 case EVENT_CONNECT_RESULT:
3d54d255 843 __cfg80211_connect_result(
5349a0f7
VK		 844 wdev->netdev,
845 &ev->cr,
846 ev->cr.status == WLAN_STATUS_SUCCESS);
3d54d255
JB		 847 break;
848 case EVENT_ROAMED:
29ce6ecb 849 __cfg80211_roamed(wdev, &ev->rm);
3d54d255
JB		 850 break;
851 case EVENT_DISCONNECTED:
852 __cfg80211_disconnected(wdev->netdev,
853 ev->dc.ie, ev->dc.ie_len,
80279fb7
JB		 854 ev->dc.reason,
855 !ev->dc.locally_generated);
3d54d255
JB		 856 break;
857 case EVENT_IBSS_JOINED:
fe94f3a4
AQ		 858 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
859 ev->ij.channel);
3d54d255 860 break;
f04c2203
MK		 861 case EVENT_STOPPED:
862 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
863 break;
503c1fb9
AS		 864 case EVENT_PORT_AUTHORIZED:
865 __cfg80211_port_authorized(wdev, ev->pa.bssid);
866 break;
3d54d255
JB		 867 }
868 wdev_unlock(wdev);
869
870 kfree(ev);
871
872 spin_lock_irqsave(&wdev->event_lock, flags);
873 }
874 spin_unlock_irqrestore(&wdev->event_lock, flags);
875}
876
877void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
878{
879 struct wireless_dev *wdev;
880
881 ASSERT_RTNL();
3d54d255 882
53873f13 883 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
3d54d255 884 cfg80211_process_wdev_events(wdev);
3d54d255
JB		 885}
886
887int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
888 struct net_device *dev, enum nl80211_iftype ntype,
818a986e 889 struct vif_params *params)
3d54d255
JB		 890{
891 int err;
892 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
893
73fb08e2 894 ASSERT_RTNL();
3d54d255
JB		 895
896 /* don't support changing VLANs, you just re-create them */
897 if (otype == NL80211_IFTYPE_AP_VLAN)
898 return -EOPNOTSUPP;
899
cb3b7d87
AB		 900 /* cannot change into P2P device or NAN */
901 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
902 ntype == NL80211_IFTYPE_NAN)
98104fde
JB		 903 return -EOPNOTSUPP;
904
3d54d255
JB		 905 if (!rdev->ops->change_virtual_intf ||
906 !(rdev->wiphy.interface_modes & (1 << ntype)))
907 return -EOPNOTSUPP;
908
ad4bb6f8 909 /* if it's part of a bridge, reject changing type to station/ibss */
f350a0a8 910 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
074ac8df
JB		 911 (ntype == NL80211_IFTYPE_ADHOC ||
912 ntype == NL80211_IFTYPE_STATION ||
913 ntype == NL80211_IFTYPE_P2P_CLIENT))
ad4bb6f8
JB		 914 return -EBUSY;
915
6cbfb1bb 916 if (ntype != otype) {
9bc383de 917 dev->ieee80211_ptr->use_4addr = false;
29cbe68c 918 dev->ieee80211_ptr->mesh_id_up_len = 0;
194ff52d 919 wdev_lock(dev->ieee80211_ptr);
fa9ffc74 920 rdev_set_qos_map(rdev, dev, NULL);
194ff52d 921 wdev_unlock(dev->ieee80211_ptr);
9bc383de 922
3d54d255 923 switch (otype) {
ac800140 924 case NL80211_IFTYPE_AP:
7c8d5e03 925 cfg80211_stop_ap(rdev, dev, true);
ac800140 926 break;
3d54d255
JB		 927 case NL80211_IFTYPE_ADHOC:
928 cfg80211_leave_ibss(rdev, dev, false);
929 break;
930 case NL80211_IFTYPE_STATION:
074ac8df 931 case NL80211_IFTYPE_P2P_CLIENT:
83739b03 932 wdev_lock(dev->ieee80211_ptr);
3d54d255
JB		 933 cfg80211_disconnect(rdev, dev,
934 WLAN_REASON_DEAUTH_LEAVING, true);
83739b03 935 wdev_unlock(dev->ieee80211_ptr);
3d54d255
JB		 936 break;
937 case NL80211_IFTYPE_MESH_POINT:
938 /* mesh should be handled? */
939 break;
940 default:
941 break;
942 }
943
944 cfg80211_process_rdev_events(rdev);
945 }
946
818a986e 947 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
3d54d255
JB		 948
949 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
950
9bc383de
JB		 951 if (!err && params && params->use_4addr != -1)
952 dev->ieee80211_ptr->use_4addr = params->use_4addr;
953
ad4bb6f8
JB		 954 if (!err) {
955 dev->priv_flags &= ~IFF_DONT_BRIDGE;
956 switch (ntype) {
957 case NL80211_IFTYPE_STATION:
958 if (dev->ieee80211_ptr->use_4addr)
959 break;
960 /* fall through */
6e0bd6c3 961 case NL80211_IFTYPE_OCB:
074ac8df 962 case NL80211_IFTYPE_P2P_CLIENT:
ad4bb6f8
JB		 963 case NL80211_IFTYPE_ADHOC:
964 dev->priv_flags |= IFF_DONT_BRIDGE;
965 break;
074ac8df 966 case NL80211_IFTYPE_P2P_GO:
ad4bb6f8
JB		 967 case NL80211_IFTYPE_AP:
968 case NL80211_IFTYPE_AP_VLAN:
969 case NL80211_IFTYPE_WDS:
970 case NL80211_IFTYPE_MESH_POINT:
971 /* bridging OK */
972 break;
973 case NL80211_IFTYPE_MONITOR:
974 /* monitor can't bridge anyway */
975 break;
976 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 977 case NUM_NL80211_IFTYPES:
ad4bb6f8
JB		 978 /* not happening */
979 break;
98104fde 980 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 981 case NL80211_IFTYPE_NAN:
98104fde
JB		 982 WARN_ON(1);
983 break;
ad4bb6f8
JB		 984 }
985 }
986
dbbae26a
MK		 987 if (!err && ntype != otype && netif_running(dev)) {
988 cfg80211_update_iface_num(rdev, ntype, 1);
989 cfg80211_update_iface_num(rdev, otype, -1);
990 }
991
3d54d255
JB		 992 return err;
993}
254416aa 994
0c1eca4e
JB		 995static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
996{
997 int modulation, streams, bitrate;
998
999 /* the formula below does only work for MCS values smaller than 32 */
1000 if (WARN_ON_ONCE(rate->mcs >= 32))
1001 return 0;
1002
1003 modulation = rate->mcs & 7;
1004 streams = (rate->mcs >> 3) + 1;
1005
1006 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1007
1008 if (modulation < 4)
1009 bitrate *= (modulation + 1);
1010 else if (modulation == 4)
1011 bitrate *= (modulation + 2);
1012 else
1013 bitrate *= (modulation + 3);
1014
1015 bitrate *= streams;
1016
1017 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1018 bitrate = (bitrate / 9) * 10;
1019
1020 /* do NOT round down here */
1021 return (bitrate + 50000) / 100000;
1022}
1023
95ddc1fc
VK		 1024static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1025{
1026 static const u32 __mcs2bitrate[] = {
1027 /* control PHY */
1028 [0] = 275,
1029 /* SC PHY */
1030 [1] = 3850,
1031 [2] = 7700,
1032 [3] = 9625,
1033 [4] = 11550,
1034 [5] = 12512, /* 1251.25 mbps */
1035 [6] = 15400,
1036 [7] = 19250,
1037 [8] = 23100,
1038 [9] = 25025,
1039 [10] = 30800,
1040 [11] = 38500,
1041 [12] = 46200,
1042 /* OFDM PHY */
1043 [13] = 6930,
1044 [14] = 8662, /* 866.25 mbps */
1045 [15] = 13860,
1046 [16] = 17325,
1047 [17] = 20790,
1048 [18] = 27720,
1049 [19] = 34650,
1050 [20] = 41580,
1051 [21] = 45045,
1052 [22] = 51975,
1053 [23] = 62370,
1054 [24] = 67568, /* 6756.75 mbps */
1055 /* LP-SC PHY */
1056 [25] = 6260,
1057 [26] = 8340,
1058 [27] = 11120,
1059 [28] = 12510,
1060 [29] = 16680,
1061 [30] = 22240,
1062 [31] = 25030,
1063 };
1064
1065 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1066 return 0;
1067
1068 return __mcs2bitrate[rate->mcs];
1069}
1070
db9c64cf
JB		 1071static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1072{
1073 static const u32 base[4][10] = {
1074 { 6500000,
1075 13000000,
1076 19500000,
1077 26000000,
1078 39000000,
1079 52000000,
1080 58500000,
1081 65000000,
1082 78000000,
8fdd136f
PT		 1083 /* not in the spec, but some devices use this: */
1084 86500000,
db9c64cf
JB		 1085 },
1086 { 13500000,
1087 27000000,
1088 40500000,
1089 54000000,
1090 81000000,
1091 108000000,
1092 121500000,
1093 135000000,
1094 162000000,
1095 180000000,
1096 },
1097 { 29300000,
1098 58500000,
1099 87800000,
1100 117000000,
1101 175500000,
1102 234000000,
1103 263300000,
1104 292500000,
1105 351000000,
1106 390000000,
1107 },
1108 { 58500000,
1109 117000000,
1110 175500000,
1111 234000000,
1112 351000000,
1113 468000000,
1114 526500000,
1115 585000000,
1116 702000000,
1117 780000000,
1118 },
1119 };
1120 u32 bitrate;
1121 int idx;
1122
ca8fe250
JB		 1123 if (rate->mcs > 9)
1124 goto warn;
db9c64cf 1125
b51f3bee
JB		 1126 switch (rate->bw) {
1127 case RATE_INFO_BW_160:
1128 idx = 3;
1129 break;
1130 case RATE_INFO_BW_80:
1131 idx = 2;
1132 break;
1133 case RATE_INFO_BW_40:
1134 idx = 1;
1135 break;
1136 case RATE_INFO_BW_5:
1137 case RATE_INFO_BW_10:
1138 default:
ca8fe250 1139 goto warn;
b51f3bee
JB		 1140 case RATE_INFO_BW_20:
1141 idx = 0;
1142 }
db9c64cf
JB		 1143
1144 bitrate = base[idx][rate->mcs];
1145 bitrate *= rate->nss;
1146
1147 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1148 bitrate = (bitrate / 9) * 10;
1149
1150 /* do NOT round down here */
1151 return (bitrate + 50000) / 100000;
ca8fe250
JB		 1152 warn:
1153 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1154 rate->bw, rate->mcs, rate->nss);
1155 return 0;
db9c64cf
JB		 1156}
1157
8eb41c8d 1158u32 cfg80211_calculate_bitrate(struct rate_info *rate)
254416aa 1159{
0c1eca4e
JB		 1160 if (rate->flags & RATE_INFO_FLAGS_MCS)
1161 return cfg80211_calculate_bitrate_ht(rate);
95ddc1fc
VK		 1162 if (rate->flags & RATE_INFO_FLAGS_60G)
1163 return cfg80211_calculate_bitrate_60g(rate);
db9c64cf
JB		 1164 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1165 return cfg80211_calculate_bitrate_vht(rate);
254416aa 1166
0c1eca4e 1167 return rate->legacy;
254416aa 1168}
8097e149 1169EXPORT_SYMBOL(cfg80211_calculate_bitrate);
56d1893d 1170
c216e641
AS		 1171int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1172 enum ieee80211_p2p_attr_id attr,
1173 u8 *buf, unsigned int bufsize)
0ee45355
JB		 1174{
1175 u8 *out = buf;
1176 u16 attr_remaining = 0;
1177 bool desired_attr = false;
1178 u16 desired_len = 0;
1179
1180 while (len > 0) {
1181 unsigned int iedatalen;
1182 unsigned int copy;
1183 const u8 *iedata;
1184
1185 if (len < 2)
1186 return -EILSEQ;
1187 iedatalen = ies[1];
1188 if (iedatalen + 2 > len)
1189 return -EILSEQ;
1190
1191 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1192 goto cont;
1193
1194 if (iedatalen < 4)
1195 goto cont;
1196
1197 iedata = ies + 2;
1198
1199 /* check WFA OUI, P2P subtype */
1200 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1201 iedata[2] != 0x9a || iedata[3] != 0x09)
1202 goto cont;
1203
1204 iedatalen -= 4;
1205 iedata += 4;
1206
1207 /* check attribute continuation into this IE */
1208 copy = min_t(unsigned int, attr_remaining, iedatalen);
1209 if (copy && desired_attr) {
1210 desired_len += copy;
1211 if (out) {
1212 memcpy(out, iedata, min(bufsize, copy));
1213 out += min(bufsize, copy);
1214 bufsize -= min(bufsize, copy);
1215 }
1216
1217
1218 if (copy == attr_remaining)
1219 return desired_len;
1220 }
1221
1222 attr_remaining -= copy;
1223 if (attr_remaining)
1224 goto cont;
1225
1226 iedatalen -= copy;
1227 iedata += copy;
1228
1229 while (iedatalen > 0) {
1230 u16 attr_len;
1231
1232 /* P2P attribute ID & size must fit */
1233 if (iedatalen < 3)
1234 return -EILSEQ;
1235 desired_attr = iedata[0] == attr;
1236 attr_len = get_unaligned_le16(iedata + 1);
1237 iedatalen -= 3;
1238 iedata += 3;
1239
1240 copy = min_t(unsigned int, attr_len, iedatalen);
1241
1242 if (desired_attr) {
1243 desired_len += copy;
1244 if (out) {
1245 memcpy(out, iedata, min(bufsize, copy));
1246 out += min(bufsize, copy);
1247 bufsize -= min(bufsize, copy);
1248 }
1249
1250 if (copy == attr_len)
1251 return desired_len;
1252 }
1253
1254 iedata += copy;
1255 iedatalen -= copy;
1256 attr_remaining = attr_len - copy;
1257 }
1258
1259 cont:
1260 len -= ies[1] + 2;
1261 ies += ies[1] + 2;
1262 }
1263
1264 if (attr_remaining && desired_attr)
1265 return -EILSEQ;
1266
1267 return -ENOENT;
1268}
1269EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1270
2512b1b1 1271static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext)
29464ccc
JB		 1272{
1273 int i;
1274
2512b1b1
LK		 1275 /* Make sure array values are legal */
1276 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION))
1277 return false;
1278
1279 i = 0;
1280 while (i < n_ids) {
1281 if (ids[i] == WLAN_EID_EXTENSION) {
1282 if (id_ext && (ids[i + 1] == id))
1283 return true;
1284
1285 i += 2;
1286 continue;
1287 }
1288
1289 if (ids[i] == id && !id_ext)
29464ccc 1290 return true;
2512b1b1
LK		 1291
1292 i++;
1293 }
29464ccc
JB		 1294 return false;
1295}
1296
8ac63448
JB		 1297static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1298{
1299 /* we assume a validly formed IEs buffer */
1300 u8 len = ies[pos + 1];
1301
1302 pos += 2 + len;
1303
1304 /* the IE itself must have 255 bytes for fragments to follow */
1305 if (len < 255)
1306 return pos;
1307
1308 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1309 len = ies[pos + 1];
1310 pos += 2 + len;
1311 }
1312
1313 return pos;
1314}
1315
29464ccc
JB		 1316size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1317 const u8 *ids, int n_ids,
1318 const u8 *after_ric, int n_after_ric,
1319 size_t offset)
1320{
1321 size_t pos = offset;
1322
2512b1b1
LK		 1323 while (pos < ielen) {
1324 u8 ext = 0;
1325
1326 if (ies[pos] == WLAN_EID_EXTENSION)
1327 ext = 2;
1328 if ((pos + ext) >= ielen)
1329 break;
1330
1331 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext],
1332 ies[pos] == WLAN_EID_EXTENSION))
1333 break;
1334
29464ccc 1335 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
8ac63448 1336 pos = skip_ie(ies, ielen, pos);
29464ccc 1337
2512b1b1
LK		 1338 while (pos < ielen) {
1339 if (ies[pos] == WLAN_EID_EXTENSION)
1340 ext = 2;
1341 else
1342 ext = 0;
1343
1344 if ((pos + ext) >= ielen)
1345 break;
1346
1347 if (!ieee80211_id_in_list(after_ric,
1348 n_after_ric,
1349 ies[pos + ext],
1350 ext == 2))
1351 pos = skip_ie(ies, ielen, pos);
1352 }
29464ccc 1353 } else {
8ac63448 1354 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1355 }
1356 }
1357
1358 return pos;
1359}
1360EXPORT_SYMBOL(ieee80211_ie_split_ric);
1361
1ce3e82b 1362bool ieee80211_operating_class_to_band(u8 operating_class,
57fbcce3 1363 enum nl80211_band *band)
1ce3e82b
JB		 1364{
1365 switch (operating_class) {
1366 case 112:
1367 case 115 ... 127:
954a86ef 1368 case 128 ... 130:
57fbcce3 1369 *band = NL80211_BAND_5GHZ;
1ce3e82b
JB		 1370 return true;
1371 case 81:
1372 case 82:
1373 case 83:
1374 case 84:
57fbcce3 1375 *band = NL80211_BAND_2GHZ;
1ce3e82b 1376 return true;
55300a13 1377 case 180:
57fbcce3 1378 *band = NL80211_BAND_60GHZ;
55300a13 1379 return true;
1ce3e82b
JB		 1380 }
1381
1382 return false;
1383}
1384EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1385
a38700dd
AN		 1386bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1387 u8 *op_class)
1388{
1389 u8 vht_opclass;
1390 u16 freq = chandef->center_freq1;
1391
1392 if (freq >= 2412 && freq <= 2472) {
1393 if (chandef->width > NL80211_CHAN_WIDTH_40)
1394 return false;
1395
1396 /* 2.407 GHz, channels 1..13 */
1397 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1398 if (freq > chandef->chan->center_freq)
1399 *op_class = 83; /* HT40+ */
1400 else
1401 *op_class = 84; /* HT40- */
1402 } else {
1403 *op_class = 81;
1404 }
1405
1406 return true;
1407 }
1408
1409 if (freq == 2484) {
1410 if (chandef->width > NL80211_CHAN_WIDTH_40)
1411 return false;
1412
1413 *op_class = 82; /* channel 14 */
1414 return true;
1415 }
1416
1417 switch (chandef->width) {
1418 case NL80211_CHAN_WIDTH_80:
1419 vht_opclass = 128;
1420 break;
1421 case NL80211_CHAN_WIDTH_160:
1422 vht_opclass = 129;
1423 break;
1424 case NL80211_CHAN_WIDTH_80P80:
1425 vht_opclass = 130;
1426 break;
1427 case NL80211_CHAN_WIDTH_10:
1428 case NL80211_CHAN_WIDTH_5:
1429 return false; /* unsupported for now */
1430 default:
1431 vht_opclass = 0;
1432 break;
1433 }
1434
1435 /* 5 GHz, channels 36..48 */
1436 if (freq >= 5180 && freq <= 5240) {
1437 if (vht_opclass) {
1438 *op_class = vht_opclass;
1439 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1440 if (freq > chandef->chan->center_freq)
1441 *op_class = 116;
1442 else
1443 *op_class = 117;
1444 } else {
1445 *op_class = 115;
1446 }
1447
1448 return true;
1449 }
1450
1451 /* 5 GHz, channels 52..64 */
1452 if (freq >= 5260 && freq <= 5320) {
1453 if (vht_opclass) {
1454 *op_class = vht_opclass;
1455 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1456 if (freq > chandef->chan->center_freq)
1457 *op_class = 119;
1458 else
1459 *op_class = 120;
1460 } else {
1461 *op_class = 118;
1462 }
1463
1464 return true;
1465 }
1466
1467 /* 5 GHz, channels 100..144 */
1468 if (freq >= 5500 && freq <= 5720) {
1469 if (vht_opclass) {
1470 *op_class = vht_opclass;
1471 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1472 if (freq > chandef->chan->center_freq)
1473 *op_class = 122;
1474 else
1475 *op_class = 123;
1476 } else {
1477 *op_class = 121;
1478 }
1479
1480 return true;
1481 }
1482
1483 /* 5 GHz, channels 149..169 */
1484 if (freq >= 5745 && freq <= 5845) {
1485 if (vht_opclass) {
1486 *op_class = vht_opclass;
1487 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1488 if (freq > chandef->chan->center_freq)
1489 *op_class = 126;
1490 else
1491 *op_class = 127;
1492 } else if (freq <= 5805) {
1493 *op_class = 124;
1494 } else {
1495 *op_class = 125;
1496 }
1497
1498 return true;
1499 }
1500
1501 /* 56.16 GHz, channel 1..4 */
1502 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
1503 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1504 return false;
1505
1506 *op_class = 180;
1507 return true;
1508 }
1509
1510 /* not supported yet */
1511 return false;
1512}
1513EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1514
4c8dea63
JB		 1515static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1516 u32 *beacon_int_gcd,
1517 bool *beacon_int_different)
56d1893d
JB		 1518{
1519 struct wireless_dev *wdev;
56d1893d 1520
4c8dea63
JB		 1521 *beacon_int_gcd = 0;
1522 *beacon_int_different = false;
56d1893d 1523
4c8dea63 1524 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
56d1893d
JB		 1525 if (!wdev->beacon_interval)
1526 continue;
0c317a02 1527
4c8dea63
JB		 1528 if (!*beacon_int_gcd) {
1529 *beacon_int_gcd = wdev->beacon_interval;
0c317a02 1530 continue;
4c8dea63 1531 }
0c317a02 1532
4c8dea63 1533 if (wdev->beacon_interval == *beacon_int_gcd)
0c317a02
PK		 1534 continue;
1535
4c8dea63
JB		 1536 *beacon_int_different = true;
1537 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1538 }
0c317a02 1539
4c8dea63
JB		 1540 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1541 if (*beacon_int_gcd)
1542 *beacon_int_different = true;
1543 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
56d1893d 1544 }
4c8dea63 1545}
56d1893d 1546
4c8dea63
JB		 1547int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1548 enum nl80211_iftype iftype, u32 beacon_int)
1549{
1550 /*
1551 * This is just a basic pre-condition check; if interface combinations
1552 * are possible the driver must already be checking those with a call
1553 * to cfg80211_check_combinations(), in which case we'll validate more
1554 * through the cfg80211_calculate_bi_data() call and code in
1555 * cfg80211_iter_combinations().
1556 */
1557
1558 if (beacon_int < 10 || beacon_int > 10000)
1559 return -EINVAL;
1560
1561 return 0;
56d1893d 1562}
7527a782 1563
65a124dd 1564int cfg80211_iter_combinations(struct wiphy *wiphy,
e227300c 1565 struct iface_combination_params *params,
65a124dd
MK		 1566 void (*iter)(const struct ieee80211_iface_combination *c,
1567 void *data),
1568 void *data)
cb2d956d 1569{
8c48b50a
FF		 1570 const struct ieee80211_regdomain *regdom;
1571 enum nl80211_dfs_regions region = 0;
cb2d956d
LC		 1572 int i, j, iftype;
1573 int num_interfaces = 0;
1574 u32 used_iftypes = 0;
4c8dea63
JB		 1575 u32 beacon_int_gcd;
1576 bool beacon_int_different;
1577
1578 /*
1579 * This is a bit strange, since the iteration used to rely only on
1580 * the data given by the driver, but here it now relies on context,
1581 * in form of the currently operating interfaces.
1582 * This is OK for all current users, and saves us from having to
1583 * push the GCD calculations into all the drivers.
1584 * In the future, this should probably rely more on data that's in
1585 * cfg80211 already - the only thing not would appear to be any new
1586 * interfaces (while being brought up) and channel/radar data.
1587 */
1588 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1589 &beacon_int_gcd, &beacon_int_different);
cb2d956d 1590
e227300c 1591 if (params->radar_detect) {
8c48b50a
FF		 1592 rcu_read_lock();
1593 regdom = rcu_dereference(cfg80211_regdomain);
1594 if (regdom)
1595 region = regdom->dfs_region;
1596 rcu_read_unlock();
1597 }
1598
cb2d956d 1599 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
e227300c
PK		 1600 num_interfaces += params->iftype_num[iftype];
1601 if (params->iftype_num[iftype] > 0 &&
cb2d956d
LC		 1602 !(wiphy->software_iftypes & BIT(iftype)))
1603 used_iftypes |= BIT(iftype);
1604 }
1605
1606 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1607 const struct ieee80211_iface_combination *c;
1608 struct ieee80211_iface_limit *limits;
1609 u32 all_iftypes = 0;
1610
1611 c = &wiphy->iface_combinations[i];
1612
1613 if (num_interfaces > c->max_interfaces)
1614 continue;
e227300c 1615 if (params->num_different_channels > c->num_different_channels)
cb2d956d
LC		 1616 continue;
1617
1618 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1619 GFP_KERNEL);
1620 if (!limits)
1621 return -ENOMEM;
1622
1623 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1624 if (wiphy->software_iftypes & BIT(iftype))
1625 continue;
1626 for (j = 0; j < c->n_limits; j++) {
1627 all_iftypes |= limits[j].types;
1628 if (!(limits[j].types & BIT(iftype)))
1629 continue;
e227300c 1630 if (limits[j].max < params->iftype_num[iftype])
cb2d956d 1631 goto cont;
e227300c 1632 limits[j].max -= params->iftype_num[iftype];
cb2d956d
LC		 1633 }
1634 }
1635
e227300c
PK		 1636 if (params->radar_detect !=
1637 (c->radar_detect_widths & params->radar_detect))
cb2d956d
LC		 1638 goto cont;
1639
e227300c 1640 if (params->radar_detect && c->radar_detect_regions &&
8c48b50a
FF		 1641 !(c->radar_detect_regions & BIT(region)))
1642 goto cont;
1643
cb2d956d
LC		 1644 /* Finally check that all iftypes that we're currently
1645 * using are actually part of this combination. If they
1646 * aren't then we can't use this combination and have
1647 * to continue to the next.
1648 */
1649 if ((all_iftypes & used_iftypes) != used_iftypes)
1650 goto cont;
1651
4c8dea63 1652 if (beacon_int_gcd) {
0c317a02 1653 if (c->beacon_int_min_gcd &&
4c8dea63 1654 beacon_int_gcd < c->beacon_int_min_gcd)
0507a3ac 1655 goto cont;
4c8dea63 1656 if (!c->beacon_int_min_gcd && beacon_int_different)
0c317a02
PK		 1657 goto cont;
1658 }
1659
cb2d956d
LC		 1660 /* This combination covered all interface types and
1661 * supported the requested numbers, so we're good.
1662 */
65a124dd
MK		 1663
1664 (*iter)(c, data);
cb2d956d
LC		 1665 cont:
1666 kfree(limits);
1667 }
1668
65a124dd
MK		 1669 return 0;
1670}
1671EXPORT_SYMBOL(cfg80211_iter_combinations);
1672
1673static void
1674cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1675 void *data)
1676{
1677 int *num = data;
1678 (*num)++;
1679}
1680
1681int cfg80211_check_combinations(struct wiphy *wiphy,
e227300c 1682 struct iface_combination_params *params)
65a124dd
MK		 1683{
1684 int err, num = 0;
1685
e227300c 1686 err = cfg80211_iter_combinations(wiphy, params,
65a124dd
MK		 1687 cfg80211_iter_sum_ifcombs, &num);
1688 if (err)
1689 return err;
1690 if (num == 0)
1691 return -EBUSY;
1692
1693 return 0;
cb2d956d
LC		 1694}
1695EXPORT_SYMBOL(cfg80211_check_combinations);
1696
34850ab2
JB		 1697int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1698 const u8 *rates, unsigned int n_rates,
1699 u32 *mask)
1700{
1701 int i, j;
1702
a401d2bb
JB		 1703 if (!sband)
1704 return -EINVAL;
1705
34850ab2
JB		 1706 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1707 return -EINVAL;
1708
1709 *mask = 0;
1710
1711 for (i = 0; i < n_rates; i++) {
1712 int rate = (rates[i] & 0x7f) * 5;
1713 bool found = false;
1714
1715 for (j = 0; j < sband->n_bitrates; j++) {
1716 if (sband->bitrates[j].bitrate == rate) {
1717 found = true;
1718 *mask |= BIT(j);
1719 break;
1720 }
1721 }
1722 if (!found)
1723 return -EINVAL;
1724 }
1725
1726 /*
1727 * mask must have at least one bit set here since we
1728 * didn't accept a 0-length rates array nor allowed
1729 * entries in the array that didn't exist
1730 */
1731
1732 return 0;
1733}
11a2a357 1734
bdfbec2d
IP		 1735unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1736{
57fbcce3 1737 enum nl80211_band band;
bdfbec2d
IP		 1738 unsigned int n_channels = 0;
1739
57fbcce3 1740 for (band = 0; band < NUM_NL80211_BANDS; band++)
bdfbec2d
IP		 1741 if (wiphy->bands[band])
1742 n_channels += wiphy->bands[band]->n_channels;
1743
1744 return n_channels;
1745}
1746EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1747
7406353d
AQ		 1748int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1749 struct station_info *sinfo)
1750{
1751 struct cfg80211_registered_device *rdev;
1752 struct wireless_dev *wdev;
1753
1754 wdev = dev->ieee80211_ptr;
1755 if (!wdev)
1756 return -EOPNOTSUPP;
1757
1758 rdev = wiphy_to_rdev(wdev->wiphy);
1759 if (!rdev->ops->get_station)
1760 return -EOPNOTSUPP;
1761
1762 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1763}
1764EXPORT_SYMBOL(cfg80211_get_station);
1765
a442b761
AB		 1766void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
1767{
1768 int i;
1769
1770 if (!f)
1771 return;
1772
1773 kfree(f->serv_spec_info);
1774 kfree(f->srf_bf);
1775 kfree(f->srf_macs);
1776 for (i = 0; i < f->num_rx_filters; i++)
1777 kfree(f->rx_filters[i].filter);
1778
1779 for (i = 0; i < f->num_tx_filters; i++)
1780 kfree(f->tx_filters[i].filter);
1781
1782 kfree(f->rx_filters);
1783 kfree(f->tx_filters);
1784 kfree(f);
1785}
1786EXPORT_SYMBOL(cfg80211_free_nan_func);
1787
4787cfa0
RM		 1788bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
1789 u32 center_freq_khz, u32 bw_khz)
1790{
1791 u32 start_freq_khz, end_freq_khz;
1792
1793 start_freq_khz = center_freq_khz - (bw_khz / 2);
1794 end_freq_khz = center_freq_khz + (bw_khz / 2);
1795
1796 if (start_freq_khz >= freq_range->start_freq_khz &&
1797 end_freq_khz <= freq_range->end_freq_khz)
1798 return true;
1799
1800 return false;
1801}
1802
11a2a357
JB		 1803/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1804/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1805const unsigned char rfc1042_header[] __aligned(2) =
1806 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1807EXPORT_SYMBOL(rfc1042_header);
1808
1809/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1810const unsigned char bridge_tunnel_header[] __aligned(2) =
1811 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1812EXPORT_SYMBOL(bridge_tunnel_header);
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