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mac80211-hwsim: remove dmesg spam about get-survey.
[mirror_ubuntu-bionic-kernel.git] / net / wireless / util.c
CommitLineData
8318d78a
JB		 1/*
2 * Wireless utility functions
3 *
d3236553 4 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
2740f0cf 5 * Copyright 2013-2014 Intel Mobile Communications GmbH
8318d78a 6 */
bc3b2d7f 7#include <linux/export.h>
d3236553 8#include <linux/bitops.h>
e31a16d6 9#include <linux/etherdevice.h>
5a0e3ad6 10#include <linux/slab.h>
d3236553 11#include <net/cfg80211.h>
e31a16d6 12#include <net/ip.h>
b156579b 13#include <net/dsfield.h>
c6ca5e28 14#include <linux/if_vlan.h>
960d97f9 15#include <linux/mpls.h>
4c8dea63 16#include <linux/gcd.h>
8318d78a 17#include "core.h"
e35e4d28
HG		 18#include "rdev-ops.h"
19
8318d78a 20
bd815252
JB		 21struct ieee80211_rate *
22ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
881d948c 23 u32 basic_rates, int bitrate)
bd815252
JB		 24{
25 struct ieee80211_rate *result = &sband->bitrates[0];
26 int i;
27
28 for (i = 0; i < sband->n_bitrates; i++) {
29 if (!(basic_rates & BIT(i)))
30 continue;
31 if (sband->bitrates[i].bitrate > bitrate)
32 continue;
33 result = &sband->bitrates[i];
34 }
35
36 return result;
37}
38EXPORT_SYMBOL(ieee80211_get_response_rate);
39
74608aca
SW		 40u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
41 enum nl80211_bss_scan_width scan_width)
b422c6cd
AN		 42{
43 struct ieee80211_rate *bitrates;
44 u32 mandatory_rates = 0;
45 enum ieee80211_rate_flags mandatory_flag;
46 int i;
47
48 if (WARN_ON(!sband))
49 return 1;
50
57fbcce3 51 if (sband->band == NL80211_BAND_2GHZ) {
74608aca
SW		 52 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
53 scan_width == NL80211_BSS_CHAN_WIDTH_10)
54 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
55 else
56 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
57 } else {
b422c6cd 58 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
74608aca 59 }
b422c6cd
AN		 60
61 bitrates = sband->bitrates;
62 for (i = 0; i < sband->n_bitrates; i++)
63 if (bitrates[i].flags & mandatory_flag)
64 mandatory_rates |= BIT(i);
65 return mandatory_rates;
66}
67EXPORT_SYMBOL(ieee80211_mandatory_rates);
68
57fbcce3 69int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
8318d78a 70{
59eb21a6
BR		 71 /* see 802.11 17.3.8.3.2 and Annex J
72 * there are overlapping channel numbers in 5GHz and 2GHz bands */
3a0c52a6
VK		 73 if (chan <= 0)
74 return 0; /* not supported */
75 switch (band) {
57fbcce3 76 case NL80211_BAND_2GHZ:
59eb21a6
BR		 77 if (chan == 14)
78 return 2484;
79 else if (chan < 14)
80 return 2407 + chan * 5;
3a0c52a6 81 break;
57fbcce3 82 case NL80211_BAND_5GHZ:
3a0c52a6
VK		 83 if (chan >= 182 && chan <= 196)
84 return 4000 + chan * 5;
59eb21a6 85 else
3a0c52a6
VK		 86 return 5000 + chan * 5;
87 break;
57fbcce3 88 case NL80211_BAND_60GHZ:
3a0c52a6
VK		 89 if (chan < 5)
90 return 56160 + chan * 2160;
91 break;
92 default:
93 ;
59eb21a6 94 }
3a0c52a6 95 return 0; /* not supported */
8318d78a
JB		 96}
97EXPORT_SYMBOL(ieee80211_channel_to_frequency);
98
99int ieee80211_frequency_to_channel(int freq)
100{
59eb21a6 101 /* see 802.11 17.3.8.3.2 and Annex J */
8318d78a
JB		 102 if (freq == 2484)
103 return 14;
59eb21a6 104 else if (freq < 2484)
8318d78a 105 return (freq - 2407) / 5;
59eb21a6
BR		 106 else if (freq >= 4910 && freq <= 4980)
107 return (freq - 4000) / 5;
3a0c52a6 108 else if (freq <= 45000) /* DMG band lower limit */
59eb21a6 109 return (freq - 5000) / 5;
3a0c52a6
VK		 110 else if (freq >= 58320 && freq <= 64800)
111 return (freq - 56160) / 2160;
112 else
113 return 0;
8318d78a
JB		 114}
115EXPORT_SYMBOL(ieee80211_frequency_to_channel);
116
543b921b 117struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq)
906c730a 118{
57fbcce3 119 enum nl80211_band band;
906c730a
JB		 120 struct ieee80211_supported_band *sband;
121 int i;
122
57fbcce3 123 for (band = 0; band < NUM_NL80211_BANDS; band++) {
906c730a
JB		 124 sband = wiphy->bands[band];
125
126 if (!sband)
127 continue;
128
129 for (i = 0; i < sband->n_channels; i++) {
130 if (sband->channels[i].center_freq == freq)
131 return &sband->channels[i];
132 }
133 }
134
135 return NULL;
136}
543b921b 137EXPORT_SYMBOL(ieee80211_get_channel);
906c730a 138
343884c8 139static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
8318d78a
JB		 140{
141 int i, want;
142
343884c8 143 switch (sband->band) {
57fbcce3 144 case NL80211_BAND_5GHZ:
8318d78a
JB		 145 want = 3;
146 for (i = 0; i < sband->n_bitrates; i++) {
147 if (sband->bitrates[i].bitrate == 60 ||
148 sband->bitrates[i].bitrate == 120 ||
149 sband->bitrates[i].bitrate == 240) {
150 sband->bitrates[i].flags |=
151 IEEE80211_RATE_MANDATORY_A;
152 want--;
153 }
154 }
155 WARN_ON(want);
156 break;
57fbcce3 157 case NL80211_BAND_2GHZ:
8318d78a
JB		 158 want = 7;
159 for (i = 0; i < sband->n_bitrates; i++) {
160 if (sband->bitrates[i].bitrate == 10) {
161 sband->bitrates[i].flags |=
162 IEEE80211_RATE_MANDATORY_B |
163 IEEE80211_RATE_MANDATORY_G;
164 want--;
165 }
166
167 if (sband->bitrates[i].bitrate == 20 ||
168 sband->bitrates[i].bitrate == 55 ||
169 sband->bitrates[i].bitrate == 110 ||
170 sband->bitrates[i].bitrate == 60 ||
171 sband->bitrates[i].bitrate == 120 ||
172 sband->bitrates[i].bitrate == 240) {
173 sband->bitrates[i].flags |=
174 IEEE80211_RATE_MANDATORY_G;
175 want--;
176 }
177
aac09fbf
JB		 178 if (sband->bitrates[i].bitrate != 10 &&
179 sband->bitrates[i].bitrate != 20 &&
180 sband->bitrates[i].bitrate != 55 &&
181 sband->bitrates[i].bitrate != 110)
8318d78a
JB		 182 sband->bitrates[i].flags |=
183 IEEE80211_RATE_ERP_G;
184 }
406f2388 185 WARN_ON(want != 0 && want != 3 && want != 6);
8318d78a 186 break;
57fbcce3 187 case NL80211_BAND_60GHZ:
3a0c52a6
VK		 188 /* check for mandatory HT MCS 1..4 */
189 WARN_ON(!sband->ht_cap.ht_supported);
190 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
191 break;
57fbcce3 192 case NUM_NL80211_BANDS:
343884c8 193 default:
8318d78a
JB		 194 WARN_ON(1);
195 break;
196 }
197}
198
199void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
200{
57fbcce3 201 enum nl80211_band band;
8318d78a 202
57fbcce3 203 for (band = 0; band < NUM_NL80211_BANDS; band++)
8318d78a 204 if (wiphy->bands[band])
343884c8 205 set_mandatory_flags_band(wiphy->bands[band]);
8318d78a 206}
08645126 207
38ba3c57
JM		 208bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
209{
210 int i;
211 for (i = 0; i < wiphy->n_cipher_suites; i++)
212 if (cipher == wiphy->cipher_suites[i])
213 return true;
214 return false;
215}
216
fffd0934
JB		 217int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
218 struct key_params *params, int key_idx,
e31b8213 219 bool pairwise, const u8 *mac_addr)
08645126 220{
e9c8f8d3 221 if (key_idx < 0 || key_idx > 5)
08645126
JB		 222 return -EINVAL;
223
e31b8213
JB		 224 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
225 return -EINVAL;
226
227 if (pairwise && !mac_addr)
228 return -EINVAL;
229
37720569
JM		 230 switch (params->cipher) {
231 case WLAN_CIPHER_SUITE_TKIP:
232 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 233 case WLAN_CIPHER_SUITE_CCMP_256:
234 case WLAN_CIPHER_SUITE_GCMP:
235 case WLAN_CIPHER_SUITE_GCMP_256:
37720569
JM		 236 /* Disallow pairwise keys with non-zero index unless it's WEP
237 * or a vendor specific cipher (because current deployments use
238 * pairwise WEP keys with non-zero indices and for vendor
239 * specific ciphers this should be validated in the driver or
240 * hardware level - but 802.11i clearly specifies to use zero)
241 */
242 if (pairwise && key_idx)
243 return -EINVAL;
244 break;
245 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 246 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
247 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
248 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
37720569
JM		 249 /* Disallow BIP (group-only) cipher as pairwise cipher */
250 if (pairwise)
251 return -EINVAL;
e9c8f8d3
JB		 252 if (key_idx < 4)
253 return -EINVAL;
37720569 254 break;
e9c8f8d3
JB		 255 case WLAN_CIPHER_SUITE_WEP40:
256 case WLAN_CIPHER_SUITE_WEP104:
257 if (key_idx > 3)
258 return -EINVAL;
37720569
JM		 259 default:
260 break;
261 }
08645126 262
08645126
JB		 263 switch (params->cipher) {
264 case WLAN_CIPHER_SUITE_WEP40:
8fc0fee0 265 if (params->key_len != WLAN_KEY_LEN_WEP40)
08645126
JB		 266 return -EINVAL;
267 break;
268 case WLAN_CIPHER_SUITE_TKIP:
8fc0fee0 269 if (params->key_len != WLAN_KEY_LEN_TKIP)
08645126
JB		 270 return -EINVAL;
271 break;
272 case WLAN_CIPHER_SUITE_CCMP:
8fc0fee0 273 if (params->key_len != WLAN_KEY_LEN_CCMP)
08645126
JB		 274 return -EINVAL;
275 break;
cfcf1682
JM		 276 case WLAN_CIPHER_SUITE_CCMP_256:
277 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
278 return -EINVAL;
279 break;
280 case WLAN_CIPHER_SUITE_GCMP:
281 if (params->key_len != WLAN_KEY_LEN_GCMP)
282 return -EINVAL;
283 break;
284 case WLAN_CIPHER_SUITE_GCMP_256:
285 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
286 return -EINVAL;
287 break;
08645126 288 case WLAN_CIPHER_SUITE_WEP104:
8fc0fee0 289 if (params->key_len != WLAN_KEY_LEN_WEP104)
08645126
JB		 290 return -EINVAL;
291 break;
292 case WLAN_CIPHER_SUITE_AES_CMAC:
8fc0fee0 293 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
08645126
JB		 294 return -EINVAL;
295 break;
cfcf1682
JM		 296 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
297 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
298 return -EINVAL;
299 break;
300 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
301 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
302 return -EINVAL;
303 break;
304 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
305 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
306 return -EINVAL;
307 break;
08645126 308 default:
7d64b7cc
JB		 309 /*
310 * We don't know anything about this algorithm,
311 * allow using it -- but the driver must check
312 * all parameters! We still check below whether
313 * or not the driver supports this algorithm,
314 * of course.
315 */
316 break;
08645126
JB		 317 }
318
9f26a952
JM		 319 if (params->seq) {
320 switch (params->cipher) {
321 case WLAN_CIPHER_SUITE_WEP40:
322 case WLAN_CIPHER_SUITE_WEP104:
323 /* These ciphers do not use key sequence */
324 return -EINVAL;
325 case WLAN_CIPHER_SUITE_TKIP:
326 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 327 case WLAN_CIPHER_SUITE_CCMP_256:
328 case WLAN_CIPHER_SUITE_GCMP:
329 case WLAN_CIPHER_SUITE_GCMP_256:
9f26a952 330 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 331 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
332 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
333 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
9f26a952
JM		 334 if (params->seq_len != 6)
335 return -EINVAL;
336 break;
337 }
338 }
339
38ba3c57 340 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
fffd0934
JB		 341 return -EINVAL;
342
08645126
JB		 343 return 0;
344}
e31a16d6 345
633adf1a 346unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
e31a16d6
ZY		 347{
348 unsigned int hdrlen = 24;
349
350 if (ieee80211_is_data(fc)) {
351 if (ieee80211_has_a4(fc))
352 hdrlen = 30;
d0dd2de0 353 if (ieee80211_is_data_qos(fc)) {
e31a16d6 354 hdrlen += IEEE80211_QOS_CTL_LEN;
d0dd2de0
AT		 355 if (ieee80211_has_order(fc))
356 hdrlen += IEEE80211_HT_CTL_LEN;
357 }
e31a16d6
ZY		 358 goto out;
359 }
360
fb142f4b
FC		 361 if (ieee80211_is_mgmt(fc)) {
362 if (ieee80211_has_order(fc))
363 hdrlen += IEEE80211_HT_CTL_LEN;
364 goto out;
365 }
366
e31a16d6
ZY		 367 if (ieee80211_is_ctl(fc)) {
368 /*
369 * ACK and CTS are 10 bytes, all others 16. To see how
370 * to get this condition consider
371 * subtype mask: 0b0000000011110000 (0x00F0)
372 * ACK subtype: 0b0000000011010000 (0x00D0)
373 * CTS subtype: 0b0000000011000000 (0x00C0)
374 * bits that matter: ^^^ (0x00E0)
375 * value of those: 0b0000000011000000 (0x00C0)
376 */
377 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
378 hdrlen = 10;
379 else
380 hdrlen = 16;
381 }
382out:
383 return hdrlen;
384}
385EXPORT_SYMBOL(ieee80211_hdrlen);
386
387unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
388{
389 const struct ieee80211_hdr *hdr =
390 (const struct ieee80211_hdr *)skb->data;
391 unsigned int hdrlen;
392
393 if (unlikely(skb->len < 10))
394 return 0;
395 hdrlen = ieee80211_hdrlen(hdr->frame_control);
396 if (unlikely(hdrlen > skb->len))
397 return 0;
398 return hdrlen;
399}
400EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
401
2d1c304c 402static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
e31a16d6 403{
2d1c304c 404 int ae = flags & MESH_FLAGS_AE;
7dd111e8 405 /* 802.11-2012, 8.2.4.7.3 */
e31a16d6 406 switch (ae) {
7dd111e8 407 default:
e31a16d6
ZY		 408 case 0:
409 return 6;
3c5772a5 410 case MESH_FLAGS_AE_A4:
e31a16d6 411 return 12;
3c5772a5 412 case MESH_FLAGS_AE_A5_A6:
e31a16d6 413 return 18;
e31a16d6
ZY		 414 }
415}
2d1c304c
FF		 416
417unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
418{
419 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
420}
9b395bc3 421EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
e31a16d6 422
7f6990c8
JB		 423int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
424 const u8 *addr, enum nl80211_iftype iftype)
e31a16d6
ZY		 425{
426 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2d1c304c
FF		 427 struct {
428 u8 hdr[ETH_ALEN] __aligned(2);
429 __be16 proto;
430 } payload;
431 struct ethhdr tmp;
432 u16 hdrlen;
433 u8 mesh_flags = 0;
e31a16d6
ZY		 434
435 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
436 return -1;
437
438 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2d1c304c
FF		 439 if (skb->len < hdrlen + 8)
440 return -1;
e31a16d6
ZY		 441
442 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
443 * header
444 * IEEE 802.11 address fields:
445 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
446 * 0 0 DA SA BSSID n/a
447 * 0 1 DA BSSID SA n/a
448 * 1 0 BSSID SA DA n/a
449 * 1 1 RA TA DA SA
450 */
2d1c304c
FF		 451 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
452 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
453
454 if (iftype == NL80211_IFTYPE_MESH_POINT)
455 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
e31a16d6
ZY		 456
457 switch (hdr->frame_control &
458 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
459 case cpu_to_le16(IEEE80211_FCTL_TODS):
460 if (unlikely(iftype != NL80211_IFTYPE_AP &&
074ac8df
JB		 461 iftype != NL80211_IFTYPE_AP_VLAN &&
462 iftype != NL80211_IFTYPE_P2P_GO))
e31a16d6
ZY		 463 return -1;
464 break;
465 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
466 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
f14543ee
FF		 467 iftype != NL80211_IFTYPE_MESH_POINT &&
468 iftype != NL80211_IFTYPE_AP_VLAN &&
469 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 470 return -1;
471 if (iftype == NL80211_IFTYPE_MESH_POINT) {
2d1c304c 472 if (mesh_flags & MESH_FLAGS_AE_A4)
e3cf8b3f 473 return -1;
2d1c304c 474 if (mesh_flags & MESH_FLAGS_AE_A5_A6) {
e3cf8b3f
ZY		 475 skb_copy_bits(skb, hdrlen +
476 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c 477 tmp.h_dest, 2 * ETH_ALEN);
e31a16d6 478 }
2d1c304c 479 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
e31a16d6
ZY		 480 }
481 break;
482 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5 483 if ((iftype != NL80211_IFTYPE_STATION &&
074ac8df
JB		 484 iftype != NL80211_IFTYPE_P2P_CLIENT &&
485 iftype != NL80211_IFTYPE_MESH_POINT) ||
2d1c304c
FF		 486 (is_multicast_ether_addr(tmp.h_dest) &&
487 ether_addr_equal(tmp.h_source, addr)))
e31a16d6 488 return -1;
3c5772a5 489 if (iftype == NL80211_IFTYPE_MESH_POINT) {
2d1c304c 490 if (mesh_flags & MESH_FLAGS_AE_A5_A6)
7dd111e8 491 return -1;
2d1c304c 492 if (mesh_flags & MESH_FLAGS_AE_A4)
e3cf8b3f
ZY		 493 skb_copy_bits(skb, hdrlen +
494 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c
FF		 495 tmp.h_source, ETH_ALEN);
496 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
3c5772a5 497 }
e31a16d6
ZY		 498 break;
499 case cpu_to_le16(0):
941c93cd 500 if (iftype != NL80211_IFTYPE_ADHOC &&
6e0bd6c3
RL		 501 iftype != NL80211_IFTYPE_STATION &&
502 iftype != NL80211_IFTYPE_OCB)
941c93cd 503 return -1;
e31a16d6
ZY		 504 break;
505 }
506
2d1c304c
FF		 507 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
508 tmp.h_proto = payload.proto;
e31a16d6 509
2d1c304c
FF		 510 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
511 tmp.h_proto != htons(ETH_P_AARP) &&
512 tmp.h_proto != htons(ETH_P_IPX)) ||
513 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
e31a16d6
ZY		 514 /* remove RFC1042 or Bridge-Tunnel encapsulation and
515 * replace EtherType */
2d1c304c
FF		 516 hdrlen += ETH_ALEN + 2;
517 else
c041778c 518 tmp.h_proto = htons(skb->len - hdrlen);
2d1c304c
FF		 519
520 pskb_pull(skb, hdrlen);
e31a16d6 521
2d1c304c 522 if (!ehdr)
e31a16d6 523 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
2d1c304c
FF		 524 memcpy(ehdr, &tmp, sizeof(tmp));
525
e31a16d6
ZY		 526 return 0;
527}
7f6990c8 528EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
e31a16d6 529
eaf85ca7 530int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
c1e5f471
JB		 531 enum nl80211_iftype iftype,
532 const u8 *bssid, bool qos)
e31a16d6
ZY		 533{
534 struct ieee80211_hdr hdr;
535 u16 hdrlen, ethertype;
536 __le16 fc;
537 const u8 *encaps_data;
538 int encaps_len, skip_header_bytes;
539 int nh_pos, h_pos;
540 int head_need;
541
542 if (unlikely(skb->len < ETH_HLEN))
543 return -EINVAL;
544
545 nh_pos = skb_network_header(skb) - skb->data;
546 h_pos = skb_transport_header(skb) - skb->data;
547
548 /* convert Ethernet header to proper 802.11 header (based on
549 * operation mode) */
550 ethertype = (skb->data[12] << 8) | skb->data[13];
551 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
552
553 switch (iftype) {
554 case NL80211_IFTYPE_AP:
555 case NL80211_IFTYPE_AP_VLAN:
074ac8df 556 case NL80211_IFTYPE_P2P_GO:
e31a16d6
ZY		 557 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
558 /* DA BSSID SA */
559 memcpy(hdr.addr1, skb->data, ETH_ALEN);
560 memcpy(hdr.addr2, addr, ETH_ALEN);
561 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
562 hdrlen = 24;
563 break;
564 case NL80211_IFTYPE_STATION:
074ac8df 565 case NL80211_IFTYPE_P2P_CLIENT:
e31a16d6
ZY		 566 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
567 /* BSSID SA DA */
568 memcpy(hdr.addr1, bssid, ETH_ALEN);
569 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
570 memcpy(hdr.addr3, skb->data, ETH_ALEN);
571 hdrlen = 24;
572 break;
6e0bd6c3 573 case NL80211_IFTYPE_OCB:
e31a16d6
ZY		 574 case NL80211_IFTYPE_ADHOC:
575 /* DA SA BSSID */
576 memcpy(hdr.addr1, skb->data, ETH_ALEN);
577 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
578 memcpy(hdr.addr3, bssid, ETH_ALEN);
579 hdrlen = 24;
580 break;
581 default:
582 return -EOPNOTSUPP;
583 }
584
585 if (qos) {
586 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
587 hdrlen += 2;
588 }
589
590 hdr.frame_control = fc;
591 hdr.duration_id = 0;
592 hdr.seq_ctrl = 0;
593
594 skip_header_bytes = ETH_HLEN;
595 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
596 encaps_data = bridge_tunnel_header;
597 encaps_len = sizeof(bridge_tunnel_header);
598 skip_header_bytes -= 2;
e5c5d22e 599 } else if (ethertype >= ETH_P_802_3_MIN) {
e31a16d6
ZY		 600 encaps_data = rfc1042_header;
601 encaps_len = sizeof(rfc1042_header);
602 skip_header_bytes -= 2;
603 } else {
604 encaps_data = NULL;
605 encaps_len = 0;
606 }
607
608 skb_pull(skb, skip_header_bytes);
609 nh_pos -= skip_header_bytes;
610 h_pos -= skip_header_bytes;
611
612 head_need = hdrlen + encaps_len - skb_headroom(skb);
613
614 if (head_need > 0 || skb_cloned(skb)) {
615 head_need = max(head_need, 0);
616 if (head_need)
617 skb_orphan(skb);
618
24616152 619 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
e31a16d6 620 return -ENOMEM;
e31a16d6
ZY		 621 }
622
623 if (encaps_data) {
624 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
625 nh_pos += encaps_len;
626 h_pos += encaps_len;
627 }
628
629 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
630
631 nh_pos += hdrlen;
632 h_pos += hdrlen;
633
634 /* Update skb pointers to various headers since this modified frame
635 * is going to go through Linux networking code that may potentially
636 * need things like pointer to IP header. */
3ef523ae 637 skb_reset_mac_header(skb);
e31a16d6
ZY		 638 skb_set_network_header(skb, nh_pos);
639 skb_set_transport_header(skb, h_pos);
640
641 return 0;
642}
643EXPORT_SYMBOL(ieee80211_data_from_8023);
644
2b67f944
FF		 645static void
646__frame_add_frag(struct sk_buff *skb, struct page *page,
647 void *ptr, int len, int size)
648{
649 struct skb_shared_info *sh = skb_shinfo(skb);
650 int page_offset;
651
6d061f9f 652 page_ref_inc(page);
2b67f944
FF		 653 page_offset = ptr - page_address(page);
654 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
655}
656
657static void
658__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
659 int offset, int len)
660{
661 struct skb_shared_info *sh = skb_shinfo(skb);
662 const skb_frag_t *frag = &sh->frags[-1];
663 struct page *frag_page;
664 void *frag_ptr;
665 int frag_len, frag_size;
666 int head_size = skb->len - skb->data_len;
667 int cur_len;
668
669 frag_page = virt_to_head_page(skb->head);
670 frag_ptr = skb->data;
671 frag_size = head_size;
672
673 while (offset >= frag_size) {
674 offset -= frag_size;
675 frag++;
676 frag_page = skb_frag_page(frag);
677 frag_ptr = skb_frag_address(frag);
678 frag_size = skb_frag_size(frag);
679 }
680
681 frag_ptr += offset;
682 frag_len = frag_size - offset;
683
684 cur_len = min(len, frag_len);
685
686 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
687 len -= cur_len;
688
689 while (len > 0) {
690 frag++;
691 frag_len = skb_frag_size(frag);
692 cur_len = min(len, frag_len);
693 __frame_add_frag(frame, skb_frag_page(frag),
694 skb_frag_address(frag), cur_len, frag_len);
695 len -= cur_len;
696 }
697}
698
230fd28a
FF		 699static struct sk_buff *
700__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
2b67f944 701 int offset, int len, bool reuse_frag)
230fd28a
FF		 702{
703 struct sk_buff *frame;
2b67f944 704 int cur_len = len;
230fd28a
FF		 705
706 if (skb->len - offset < len)
707 return NULL;
708
2b67f944
FF		 709 /*
710 * When reusing framents, copy some data to the head to simplify
711 * ethernet header handling and speed up protocol header processing
712 * in the stack later.
713 */
714 if (reuse_frag)
715 cur_len = min_t(int, len, 32);
716
230fd28a
FF		 717 /*
718 * Allocate and reserve two bytes more for payload
719 * alignment since sizeof(struct ethhdr) is 14.
720 */
2b67f944 721 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
16a910a6
GG		 722 if (!frame)
723 return NULL;
230fd28a
FF		 724
725 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
2b67f944
FF		 726 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
727
728 len -= cur_len;
729 if (!len)
730 return frame;
731
732 offset += cur_len;
733 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
230fd28a
FF		 734
735 return frame;
736}
eaf85ca7
ZY		 737
738void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
739 const u8 *addr, enum nl80211_iftype iftype,
8b3becad 740 const unsigned int extra_headroom,
8b935ee2 741 const u8 *check_da, const u8 *check_sa)
eaf85ca7 742{
230fd28a 743 unsigned int hlen = ALIGN(extra_headroom, 4);
eaf85ca7
ZY		 744 struct sk_buff *frame = NULL;
745 u16 ethertype;
746 u8 *payload;
7f6990c8 747 int offset = 0, remaining;
230fd28a 748 struct ethhdr eth;
2b67f944 749 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
2bf0ccc7 750 bool reuse_skb = false;
230fd28a 751 bool last = false;
88665f5a 752
230fd28a
FF		 753 while (!last) {
754 unsigned int subframe_len;
755 int len;
eaf85ca7 756 u8 padding;
eaf85ca7 757
230fd28a
FF		 758 skb_copy_bits(skb, offset, &eth, sizeof(eth));
759 len = ntohs(eth.h_proto);
760 subframe_len = sizeof(struct ethhdr) + len;
eaf85ca7 761 padding = (4 - subframe_len) & 0x3;
230fd28a 762
eaf85ca7 763 /* the last MSDU has no padding */
230fd28a 764 remaining = skb->len - offset;
eaf85ca7
ZY		 765 if (subframe_len > remaining)
766 goto purge;
767
230fd28a 768 offset += sizeof(struct ethhdr);
230fd28a 769 last = remaining <= subframe_len + padding;
8b935ee2
JB		 770
771 /* FIXME: should we really accept multicast DA? */
772 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
773 !ether_addr_equal(check_da, eth.h_dest)) ||
774 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
775 offset += len + padding;
776 continue;
777 }
778
779 /* reuse skb for the last subframe */
2b67f944 780 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
230fd28a 781 skb_pull(skb, offset);
eaf85ca7 782 frame = skb;
230fd28a
FF		 783 reuse_skb = true;
784 } else {
2b67f944
FF		 785 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
786 reuse_frag);
eaf85ca7
ZY		 787 if (!frame)
788 goto purge;
789
230fd28a 790 offset += len + padding;
eaf85ca7
ZY		 791 }
792
793 skb_reset_network_header(frame);
794 frame->dev = skb->dev;
795 frame->priority = skb->priority;
796
797 payload = frame->data;
798 ethertype = (payload[6] << 8) | payload[7];
ac422d3c 799 if (likely((ether_addr_equal(payload, rfc1042_header) &&
eaf85ca7 800 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
ac422d3c 801 ether_addr_equal(payload, bridge_tunnel_header))) {
230fd28a
FF		 802 eth.h_proto = htons(ethertype);
803 skb_pull(frame, ETH_ALEN + 2);
eaf85ca7 804 }
230fd28a
FF		 805
806 memcpy(skb_push(frame, sizeof(eth)), &eth, sizeof(eth));
eaf85ca7
ZY		 807 __skb_queue_tail(list, frame);
808 }
809
230fd28a
FF		 810 if (!reuse_skb)
811 dev_kfree_skb(skb);
812
eaf85ca7
ZY		 813 return;
814
815 purge:
816 __skb_queue_purge(list);
eaf85ca7
ZY		 817 dev_kfree_skb(skb);
818}
819EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
820
e31a16d6 821/* Given a data frame determine the 802.1p/1d tag to use. */
fa9ffc74
KP		 822unsigned int cfg80211_classify8021d(struct sk_buff *skb,
823 struct cfg80211_qos_map *qos_map)
e31a16d6
ZY		 824{
825 unsigned int dscp;
c6ca5e28 826 unsigned char vlan_priority;
e31a16d6
ZY		 827
828 /* skb->priority values from 256->263 are magic values to
829 * directly indicate a specific 802.1d priority. This is used
830 * to allow 802.1d priority to be passed directly in from VLAN
831 * tags, etc.
832 */
833 if (skb->priority >= 256 && skb->priority <= 263)
834 return skb->priority - 256;
835
df8a39de
JP		 836 if (skb_vlan_tag_present(skb)) {
837 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
c6ca5e28
V		 838 >> VLAN_PRIO_SHIFT;
839 if (vlan_priority > 0)
840 return vlan_priority;
841 }
842
e31a16d6
ZY		 843 switch (skb->protocol) {
844 case htons(ETH_P_IP):
b156579b
DT		 845 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
846 break;
847 case htons(ETH_P_IPV6):
848 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
e31a16d6 849 break;
960d97f9
SW		 850 case htons(ETH_P_MPLS_UC):
851 case htons(ETH_P_MPLS_MC): {
852 struct mpls_label mpls_tmp, *mpls;
853
854 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
855 sizeof(*mpls), &mpls_tmp);
856 if (!mpls)
857 return 0;
858
859 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
860 >> MPLS_LS_TC_SHIFT;
861 }
862 case htons(ETH_P_80221):
863 /* 802.21 is always network control traffic */
864 return 7;
e31a16d6
ZY		 865 default:
866 return 0;
867 }
868
fa9ffc74
KP		 869 if (qos_map) {
870 unsigned int i, tmp_dscp = dscp >> 2;
871
872 for (i = 0; i < qos_map->num_des; i++) {
873 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
874 return qos_map->dscp_exception[i].up;
875 }
876
877 for (i = 0; i < 8; i++) {
878 if (tmp_dscp >= qos_map->up[i].low &&
879 tmp_dscp <= qos_map->up[i].high)
880 return i;
881 }
882 }
883
e31a16d6
ZY		 884 return dscp >> 5;
885}
886EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6
JB		 887
888const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
889{
9caf0364
JB		 890 const struct cfg80211_bss_ies *ies;
891
892 ies = rcu_dereference(bss->ies);
893 if (!ies)
517357c6 894 return NULL;
9caf0364
JB		 895
896 return cfg80211_find_ie(ie, ies->data, ies->len);
517357c6
JB		 897}
898EXPORT_SYMBOL(ieee80211_bss_get_ie);
fffd0934
JB		 899
900void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
901{
f26cbf40 902 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934
JB		 903 struct net_device *dev = wdev->netdev;
904 int i;
905
906 if (!wdev->connect_keys)
907 return;
908
b8676221 909 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
fffd0934
JB		 910 if (!wdev->connect_keys->params[i].cipher)
911 continue;
e35e4d28
HG		 912 if (rdev_add_key(rdev, dev, i, false, NULL,
913 &wdev->connect_keys->params[i])) {
e9c0268f 914 netdev_err(dev, "failed to set key %d\n", i);
1e056665
ZY		 915 continue;
916 }
d4f29978
JB		 917 if (wdev->connect_keys->def == i &&
918 rdev_set_default_key(rdev, dev, i, true, true)) {
919 netdev_err(dev, "failed to set defkey %d\n", i);
920 continue;
921 }
fffd0934
JB		 922 }
923
b47f610b 924 kzfree(wdev->connect_keys);
fffd0934
JB		 925 wdev->connect_keys = NULL;
926}
3d54d255 927
1f6fc43e 928void cfg80211_process_wdev_events(struct wireless_dev *wdev)
3d54d255
JB		 929{
930 struct cfg80211_event *ev;
931 unsigned long flags;
932 const u8 *bssid = NULL;
933
934 spin_lock_irqsave(&wdev->event_lock, flags);
935 while (!list_empty(&wdev->event_list)) {
936 ev = list_first_entry(&wdev->event_list,
937 struct cfg80211_event, list);
938 list_del(&ev->list);
939 spin_unlock_irqrestore(&wdev->event_lock, flags);
940
941 wdev_lock(wdev);
942 switch (ev->type) {
943 case EVENT_CONNECT_RESULT:
944 if (!is_zero_ether_addr(ev->cr.bssid))
945 bssid = ev->cr.bssid;
946 __cfg80211_connect_result(
947 wdev->netdev, bssid,
948 ev->cr.req_ie, ev->cr.req_ie_len,
949 ev->cr.resp_ie, ev->cr.resp_ie_len,
950 ev->cr.status,
951 ev->cr.status == WLAN_STATUS_SUCCESS,
3093ebbe 952 ev->cr.bss, ev->cr.timeout_reason);
3d54d255
JB		 953 break;
954 case EVENT_ROAMED:
adbde344
VT		 955 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
956 ev->rm.req_ie_len, ev->rm.resp_ie,
957 ev->rm.resp_ie_len);
3d54d255
JB		 958 break;
959 case EVENT_DISCONNECTED:
960 __cfg80211_disconnected(wdev->netdev,
961 ev->dc.ie, ev->dc.ie_len,
80279fb7
JB		 962 ev->dc.reason,
963 !ev->dc.locally_generated);
3d54d255
JB		 964 break;
965 case EVENT_IBSS_JOINED:
fe94f3a4
AQ		 966 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
967 ev->ij.channel);
3d54d255 968 break;
f04c2203
MK		 969 case EVENT_STOPPED:
970 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
971 break;
3d54d255
JB		 972 }
973 wdev_unlock(wdev);
974
975 kfree(ev);
976
977 spin_lock_irqsave(&wdev->event_lock, flags);
978 }
979 spin_unlock_irqrestore(&wdev->event_lock, flags);
980}
981
982void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
983{
984 struct wireless_dev *wdev;
985
986 ASSERT_RTNL();
3d54d255 987
53873f13 988 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
3d54d255 989 cfg80211_process_wdev_events(wdev);
3d54d255
JB		 990}
991
992int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
993 struct net_device *dev, enum nl80211_iftype ntype,
994 u32 *flags, struct vif_params *params)
995{
996 int err;
997 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
998
73fb08e2 999 ASSERT_RTNL();
3d54d255
JB		 1000
1001 /* don't support changing VLANs, you just re-create them */
1002 if (otype == NL80211_IFTYPE_AP_VLAN)
1003 return -EOPNOTSUPP;
1004
cb3b7d87
AB		 1005 /* cannot change into P2P device or NAN */
1006 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
1007 ntype == NL80211_IFTYPE_NAN)
98104fde
JB		 1008 return -EOPNOTSUPP;
1009
3d54d255
JB		 1010 if (!rdev->ops->change_virtual_intf ||
1011 !(rdev->wiphy.interface_modes & (1 << ntype)))
1012 return -EOPNOTSUPP;
1013
ad4bb6f8 1014 /* if it's part of a bridge, reject changing type to station/ibss */
f350a0a8 1015 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
074ac8df
JB		 1016 (ntype == NL80211_IFTYPE_ADHOC ||
1017 ntype == NL80211_IFTYPE_STATION ||
1018 ntype == NL80211_IFTYPE_P2P_CLIENT))
ad4bb6f8
JB		 1019 return -EBUSY;
1020
6cbfb1bb 1021 if (ntype != otype) {
9bc383de 1022 dev->ieee80211_ptr->use_4addr = false;
29cbe68c 1023 dev->ieee80211_ptr->mesh_id_up_len = 0;
194ff52d 1024 wdev_lock(dev->ieee80211_ptr);
fa9ffc74 1025 rdev_set_qos_map(rdev, dev, NULL);
194ff52d 1026 wdev_unlock(dev->ieee80211_ptr);
9bc383de 1027
3d54d255 1028 switch (otype) {
ac800140 1029 case NL80211_IFTYPE_AP:
7c8d5e03 1030 cfg80211_stop_ap(rdev, dev, true);
ac800140 1031 break;
3d54d255
JB		 1032 case NL80211_IFTYPE_ADHOC:
1033 cfg80211_leave_ibss(rdev, dev, false);
1034 break;
1035 case NL80211_IFTYPE_STATION:
074ac8df 1036 case NL80211_IFTYPE_P2P_CLIENT:
83739b03 1037 wdev_lock(dev->ieee80211_ptr);
3d54d255
JB		 1038 cfg80211_disconnect(rdev, dev,
1039 WLAN_REASON_DEAUTH_LEAVING, true);
83739b03 1040 wdev_unlock(dev->ieee80211_ptr);
3d54d255
JB		 1041 break;
1042 case NL80211_IFTYPE_MESH_POINT:
1043 /* mesh should be handled? */
1044 break;
1045 default:
1046 break;
1047 }
1048
1049 cfg80211_process_rdev_events(rdev);
1050 }
1051
e35e4d28 1052 err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params);
3d54d255
JB		 1053
1054 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1055
9bc383de
JB		 1056 if (!err && params && params->use_4addr != -1)
1057 dev->ieee80211_ptr->use_4addr = params->use_4addr;
1058
ad4bb6f8
JB		 1059 if (!err) {
1060 dev->priv_flags &= ~IFF_DONT_BRIDGE;
1061 switch (ntype) {
1062 case NL80211_IFTYPE_STATION:
1063 if (dev->ieee80211_ptr->use_4addr)
1064 break;
1065 /* fall through */
6e0bd6c3 1066 case NL80211_IFTYPE_OCB:
074ac8df 1067 case NL80211_IFTYPE_P2P_CLIENT:
ad4bb6f8
JB		 1068 case NL80211_IFTYPE_ADHOC:
1069 dev->priv_flags |= IFF_DONT_BRIDGE;
1070 break;
074ac8df 1071 case NL80211_IFTYPE_P2P_GO:
ad4bb6f8
JB		 1072 case NL80211_IFTYPE_AP:
1073 case NL80211_IFTYPE_AP_VLAN:
1074 case NL80211_IFTYPE_WDS:
1075 case NL80211_IFTYPE_MESH_POINT:
1076 /* bridging OK */
1077 break;
1078 case NL80211_IFTYPE_MONITOR:
1079 /* monitor can't bridge anyway */
1080 break;
1081 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1082 case NUM_NL80211_IFTYPES:
ad4bb6f8
JB		 1083 /* not happening */
1084 break;
98104fde 1085 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 1086 case NL80211_IFTYPE_NAN:
98104fde
JB		 1087 WARN_ON(1);
1088 break;
ad4bb6f8
JB		 1089 }
1090 }
1091
dbbae26a
MK		 1092 if (!err && ntype != otype && netif_running(dev)) {
1093 cfg80211_update_iface_num(rdev, ntype, 1);
1094 cfg80211_update_iface_num(rdev, otype, -1);
1095 }
1096
3d54d255
JB		 1097 return err;
1098}
254416aa 1099
0c1eca4e
JB		 1100static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
1101{
1102 int modulation, streams, bitrate;
1103
1104 /* the formula below does only work for MCS values smaller than 32 */
1105 if (WARN_ON_ONCE(rate->mcs >= 32))
1106 return 0;
1107
1108 modulation = rate->mcs & 7;
1109 streams = (rate->mcs >> 3) + 1;
1110
1111 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1112
1113 if (modulation < 4)
1114 bitrate *= (modulation + 1);
1115 else if (modulation == 4)
1116 bitrate *= (modulation + 2);
1117 else
1118 bitrate *= (modulation + 3);
1119
1120 bitrate *= streams;
1121
1122 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1123 bitrate = (bitrate / 9) * 10;
1124
1125 /* do NOT round down here */
1126 return (bitrate + 50000) / 100000;
1127}
1128
95ddc1fc
VK		 1129static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1130{
1131 static const u32 __mcs2bitrate[] = {
1132 /* control PHY */
1133 [0] = 275,
1134 /* SC PHY */
1135 [1] = 3850,
1136 [2] = 7700,
1137 [3] = 9625,
1138 [4] = 11550,
1139 [5] = 12512, /* 1251.25 mbps */
1140 [6] = 15400,
1141 [7] = 19250,
1142 [8] = 23100,
1143 [9] = 25025,
1144 [10] = 30800,
1145 [11] = 38500,
1146 [12] = 46200,
1147 /* OFDM PHY */
1148 [13] = 6930,
1149 [14] = 8662, /* 866.25 mbps */
1150 [15] = 13860,
1151 [16] = 17325,
1152 [17] = 20790,
1153 [18] = 27720,
1154 [19] = 34650,
1155 [20] = 41580,
1156 [21] = 45045,
1157 [22] = 51975,
1158 [23] = 62370,
1159 [24] = 67568, /* 6756.75 mbps */
1160 /* LP-SC PHY */
1161 [25] = 6260,
1162 [26] = 8340,
1163 [27] = 11120,
1164 [28] = 12510,
1165 [29] = 16680,
1166 [30] = 22240,
1167 [31] = 25030,
1168 };
1169
1170 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1171 return 0;
1172
1173 return __mcs2bitrate[rate->mcs];
1174}
1175
db9c64cf
JB		 1176static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1177{
1178 static const u32 base[4][10] = {
1179 { 6500000,
1180 13000000,
1181 19500000,
1182 26000000,
1183 39000000,
1184 52000000,
1185 58500000,
1186 65000000,
1187 78000000,
8fdd136f
PT		 1188 /* not in the spec, but some devices use this: */
1189 86500000,
db9c64cf
JB		 1190 },
1191 { 13500000,
1192 27000000,
1193 40500000,
1194 54000000,
1195 81000000,
1196 108000000,
1197 121500000,
1198 135000000,
1199 162000000,
1200 180000000,
1201 },
1202 { 29300000,
1203 58500000,
1204 87800000,
1205 117000000,
1206 175500000,
1207 234000000,
1208 263300000,
1209 292500000,
1210 351000000,
1211 390000000,
1212 },
1213 { 58500000,
1214 117000000,
1215 175500000,
1216 234000000,
1217 351000000,
1218 468000000,
1219 526500000,
1220 585000000,
1221 702000000,
1222 780000000,
1223 },
1224 };
1225 u32 bitrate;
1226 int idx;
1227
1228 if (WARN_ON_ONCE(rate->mcs > 9))
1229 return 0;
1230
b51f3bee
JB		 1231 switch (rate->bw) {
1232 case RATE_INFO_BW_160:
1233 idx = 3;
1234 break;
1235 case RATE_INFO_BW_80:
1236 idx = 2;
1237 break;
1238 case RATE_INFO_BW_40:
1239 idx = 1;
1240 break;
1241 case RATE_INFO_BW_5:
1242 case RATE_INFO_BW_10:
1243 default:
1244 WARN_ON(1);
1245 /* fall through */
1246 case RATE_INFO_BW_20:
1247 idx = 0;
1248 }
db9c64cf
JB		 1249
1250 bitrate = base[idx][rate->mcs];
1251 bitrate *= rate->nss;
1252
1253 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1254 bitrate = (bitrate / 9) * 10;
1255
1256 /* do NOT round down here */
1257 return (bitrate + 50000) / 100000;
1258}
1259
8eb41c8d 1260u32 cfg80211_calculate_bitrate(struct rate_info *rate)
254416aa 1261{
0c1eca4e
JB		 1262 if (rate->flags & RATE_INFO_FLAGS_MCS)
1263 return cfg80211_calculate_bitrate_ht(rate);
95ddc1fc
VK		 1264 if (rate->flags & RATE_INFO_FLAGS_60G)
1265 return cfg80211_calculate_bitrate_60g(rate);
db9c64cf
JB		 1266 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1267 return cfg80211_calculate_bitrate_vht(rate);
254416aa 1268
0c1eca4e 1269 return rate->legacy;
254416aa 1270}
8097e149 1271EXPORT_SYMBOL(cfg80211_calculate_bitrate);
56d1893d 1272
c216e641
AS		 1273int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1274 enum ieee80211_p2p_attr_id attr,
1275 u8 *buf, unsigned int bufsize)
0ee45355
JB		 1276{
1277 u8 *out = buf;
1278 u16 attr_remaining = 0;
1279 bool desired_attr = false;
1280 u16 desired_len = 0;
1281
1282 while (len > 0) {
1283 unsigned int iedatalen;
1284 unsigned int copy;
1285 const u8 *iedata;
1286
1287 if (len < 2)
1288 return -EILSEQ;
1289 iedatalen = ies[1];
1290 if (iedatalen + 2 > len)
1291 return -EILSEQ;
1292
1293 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1294 goto cont;
1295
1296 if (iedatalen < 4)
1297 goto cont;
1298
1299 iedata = ies + 2;
1300
1301 /* check WFA OUI, P2P subtype */
1302 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1303 iedata[2] != 0x9a || iedata[3] != 0x09)
1304 goto cont;
1305
1306 iedatalen -= 4;
1307 iedata += 4;
1308
1309 /* check attribute continuation into this IE */
1310 copy = min_t(unsigned int, attr_remaining, iedatalen);
1311 if (copy && desired_attr) {
1312 desired_len += copy;
1313 if (out) {
1314 memcpy(out, iedata, min(bufsize, copy));
1315 out += min(bufsize, copy);
1316 bufsize -= min(bufsize, copy);
1317 }
1318
1319
1320 if (copy == attr_remaining)
1321 return desired_len;
1322 }
1323
1324 attr_remaining -= copy;
1325 if (attr_remaining)
1326 goto cont;
1327
1328 iedatalen -= copy;
1329 iedata += copy;
1330
1331 while (iedatalen > 0) {
1332 u16 attr_len;
1333
1334 /* P2P attribute ID & size must fit */
1335 if (iedatalen < 3)
1336 return -EILSEQ;
1337 desired_attr = iedata[0] == attr;
1338 attr_len = get_unaligned_le16(iedata + 1);
1339 iedatalen -= 3;
1340 iedata += 3;
1341
1342 copy = min_t(unsigned int, attr_len, iedatalen);
1343
1344 if (desired_attr) {
1345 desired_len += copy;
1346 if (out) {
1347 memcpy(out, iedata, min(bufsize, copy));
1348 out += min(bufsize, copy);
1349 bufsize -= min(bufsize, copy);
1350 }
1351
1352 if (copy == attr_len)
1353 return desired_len;
1354 }
1355
1356 iedata += copy;
1357 iedatalen -= copy;
1358 attr_remaining = attr_len - copy;
1359 }
1360
1361 cont:
1362 len -= ies[1] + 2;
1363 ies += ies[1] + 2;
1364 }
1365
1366 if (attr_remaining && desired_attr)
1367 return -EILSEQ;
1368
1369 return -ENOENT;
1370}
1371EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1372
29464ccc
JB		 1373static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1374{
1375 int i;
1376
1377 for (i = 0; i < n_ids; i++)
1378 if (ids[i] == id)
1379 return true;
1380 return false;
1381}
1382
8ac63448
JB		 1383static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1384{
1385 /* we assume a validly formed IEs buffer */
1386 u8 len = ies[pos + 1];
1387
1388 pos += 2 + len;
1389
1390 /* the IE itself must have 255 bytes for fragments to follow */
1391 if (len < 255)
1392 return pos;
1393
1394 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1395 len = ies[pos + 1];
1396 pos += 2 + len;
1397 }
1398
1399 return pos;
1400}
1401
29464ccc
JB		 1402size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1403 const u8 *ids, int n_ids,
1404 const u8 *after_ric, int n_after_ric,
1405 size_t offset)
1406{
1407 size_t pos = offset;
1408
1409 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
1410 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
8ac63448 1411 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1412
1413 while (pos < ielen &&
1414 !ieee80211_id_in_list(after_ric, n_after_ric,
1415 ies[pos]))
8ac63448 1416 pos = skip_ie(ies, ielen, pos);
29464ccc 1417 } else {
8ac63448 1418 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1419 }
1420 }
1421
1422 return pos;
1423}
1424EXPORT_SYMBOL(ieee80211_ie_split_ric);
1425
1ce3e82b 1426bool ieee80211_operating_class_to_band(u8 operating_class,
57fbcce3 1427 enum nl80211_band *band)
1ce3e82b
JB		 1428{
1429 switch (operating_class) {
1430 case 112:
1431 case 115 ... 127:
954a86ef 1432 case 128 ... 130:
57fbcce3 1433 *band = NL80211_BAND_5GHZ;
1ce3e82b
JB		 1434 return true;
1435 case 81:
1436 case 82:
1437 case 83:
1438 case 84:
57fbcce3 1439 *band = NL80211_BAND_2GHZ;
1ce3e82b 1440 return true;
55300a13 1441 case 180:
57fbcce3 1442 *band = NL80211_BAND_60GHZ;
55300a13 1443 return true;
1ce3e82b
JB		 1444 }
1445
1446 return false;
1447}
1448EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1449
a38700dd
AN		 1450bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1451 u8 *op_class)
1452{
1453 u8 vht_opclass;
1454 u16 freq = chandef->center_freq1;
1455
1456 if (freq >= 2412 && freq <= 2472) {
1457 if (chandef->width > NL80211_CHAN_WIDTH_40)
1458 return false;
1459
1460 /* 2.407 GHz, channels 1..13 */
1461 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1462 if (freq > chandef->chan->center_freq)
1463 *op_class = 83; /* HT40+ */
1464 else
1465 *op_class = 84; /* HT40- */
1466 } else {
1467 *op_class = 81;
1468 }
1469
1470 return true;
1471 }
1472
1473 if (freq == 2484) {
1474 if (chandef->width > NL80211_CHAN_WIDTH_40)
1475 return false;
1476
1477 *op_class = 82; /* channel 14 */
1478 return true;
1479 }
1480
1481 switch (chandef->width) {
1482 case NL80211_CHAN_WIDTH_80:
1483 vht_opclass = 128;
1484 break;
1485 case NL80211_CHAN_WIDTH_160:
1486 vht_opclass = 129;
1487 break;
1488 case NL80211_CHAN_WIDTH_80P80:
1489 vht_opclass = 130;
1490 break;
1491 case NL80211_CHAN_WIDTH_10:
1492 case NL80211_CHAN_WIDTH_5:
1493 return false; /* unsupported for now */
1494 default:
1495 vht_opclass = 0;
1496 break;
1497 }
1498
1499 /* 5 GHz, channels 36..48 */
1500 if (freq >= 5180 && freq <= 5240) {
1501 if (vht_opclass) {
1502 *op_class = vht_opclass;
1503 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1504 if (freq > chandef->chan->center_freq)
1505 *op_class = 116;
1506 else
1507 *op_class = 117;
1508 } else {
1509 *op_class = 115;
1510 }
1511
1512 return true;
1513 }
1514
1515 /* 5 GHz, channels 52..64 */
1516 if (freq >= 5260 && freq <= 5320) {
1517 if (vht_opclass) {
1518 *op_class = vht_opclass;
1519 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1520 if (freq > chandef->chan->center_freq)
1521 *op_class = 119;
1522 else
1523 *op_class = 120;
1524 } else {
1525 *op_class = 118;
1526 }
1527
1528 return true;
1529 }
1530
1531 /* 5 GHz, channels 100..144 */
1532 if (freq >= 5500 && freq <= 5720) {
1533 if (vht_opclass) {
1534 *op_class = vht_opclass;
1535 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1536 if (freq > chandef->chan->center_freq)
1537 *op_class = 122;
1538 else
1539 *op_class = 123;
1540 } else {
1541 *op_class = 121;
1542 }
1543
1544 return true;
1545 }
1546
1547 /* 5 GHz, channels 149..169 */
1548 if (freq >= 5745 && freq <= 5845) {
1549 if (vht_opclass) {
1550 *op_class = vht_opclass;
1551 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1552 if (freq > chandef->chan->center_freq)
1553 *op_class = 126;
1554 else
1555 *op_class = 127;
1556 } else if (freq <= 5805) {
1557 *op_class = 124;
1558 } else {
1559 *op_class = 125;
1560 }
1561
1562 return true;
1563 }
1564
1565 /* 56.16 GHz, channel 1..4 */
1566 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
1567 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1568 return false;
1569
1570 *op_class = 180;
1571 return true;
1572 }
1573
1574 /* not supported yet */
1575 return false;
1576}
1577EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1578
4c8dea63
JB		 1579static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1580 u32 *beacon_int_gcd,
1581 bool *beacon_int_different)
56d1893d
JB		 1582{
1583 struct wireless_dev *wdev;
56d1893d 1584
4c8dea63
JB		 1585 *beacon_int_gcd = 0;
1586 *beacon_int_different = false;
56d1893d 1587
4c8dea63 1588 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
56d1893d
JB		 1589 if (!wdev->beacon_interval)
1590 continue;
0c317a02 1591
4c8dea63
JB		 1592 if (!*beacon_int_gcd) {
1593 *beacon_int_gcd = wdev->beacon_interval;
0c317a02 1594 continue;
4c8dea63 1595 }
0c317a02 1596
4c8dea63 1597 if (wdev->beacon_interval == *beacon_int_gcd)
0c317a02
PK		 1598 continue;
1599
4c8dea63
JB		 1600 *beacon_int_different = true;
1601 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1602 }
0c317a02 1603
4c8dea63
JB		 1604 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1605 if (*beacon_int_gcd)
1606 *beacon_int_different = true;
1607 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
56d1893d 1608 }
4c8dea63 1609}
56d1893d 1610
4c8dea63
JB		 1611int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1612 enum nl80211_iftype iftype, u32 beacon_int)
1613{
1614 /*
1615 * This is just a basic pre-condition check; if interface combinations
1616 * are possible the driver must already be checking those with a call
1617 * to cfg80211_check_combinations(), in which case we'll validate more
1618 * through the cfg80211_calculate_bi_data() call and code in
1619 * cfg80211_iter_combinations().
1620 */
1621
1622 if (beacon_int < 10 || beacon_int > 10000)
1623 return -EINVAL;
1624
1625 return 0;
56d1893d 1626}
7527a782 1627
65a124dd 1628int cfg80211_iter_combinations(struct wiphy *wiphy,
e227300c 1629 struct iface_combination_params *params,
65a124dd
MK		 1630 void (*iter)(const struct ieee80211_iface_combination *c,
1631 void *data),
1632 void *data)
cb2d956d 1633{
8c48b50a
FF		 1634 const struct ieee80211_regdomain *regdom;
1635 enum nl80211_dfs_regions region = 0;
cb2d956d
LC		 1636 int i, j, iftype;
1637 int num_interfaces = 0;
1638 u32 used_iftypes = 0;
4c8dea63
JB		 1639 u32 beacon_int_gcd;
1640 bool beacon_int_different;
1641
1642 /*
1643 * This is a bit strange, since the iteration used to rely only on
1644 * the data given by the driver, but here it now relies on context,
1645 * in form of the currently operating interfaces.
1646 * This is OK for all current users, and saves us from having to
1647 * push the GCD calculations into all the drivers.
1648 * In the future, this should probably rely more on data that's in
1649 * cfg80211 already - the only thing not would appear to be any new
1650 * interfaces (while being brought up) and channel/radar data.
1651 */
1652 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1653 &beacon_int_gcd, &beacon_int_different);
cb2d956d 1654
e227300c 1655 if (params->radar_detect) {
8c48b50a
FF		 1656 rcu_read_lock();
1657 regdom = rcu_dereference(cfg80211_regdomain);
1658 if (regdom)
1659 region = regdom->dfs_region;
1660 rcu_read_unlock();
1661 }
1662
cb2d956d 1663 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
e227300c
PK		 1664 num_interfaces += params->iftype_num[iftype];
1665 if (params->iftype_num[iftype] > 0 &&
cb2d956d
LC		 1666 !(wiphy->software_iftypes & BIT(iftype)))
1667 used_iftypes |= BIT(iftype);
1668 }
1669
1670 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1671 const struct ieee80211_iface_combination *c;
1672 struct ieee80211_iface_limit *limits;
1673 u32 all_iftypes = 0;
1674
1675 c = &wiphy->iface_combinations[i];
1676
1677 if (num_interfaces > c->max_interfaces)
1678 continue;
e227300c 1679 if (params->num_different_channels > c->num_different_channels)
cb2d956d
LC		 1680 continue;
1681
1682 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1683 GFP_KERNEL);
1684 if (!limits)
1685 return -ENOMEM;
1686
1687 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1688 if (wiphy->software_iftypes & BIT(iftype))
1689 continue;
1690 for (j = 0; j < c->n_limits; j++) {
1691 all_iftypes |= limits[j].types;
1692 if (!(limits[j].types & BIT(iftype)))
1693 continue;
e227300c 1694 if (limits[j].max < params->iftype_num[iftype])
cb2d956d 1695 goto cont;
e227300c 1696 limits[j].max -= params->iftype_num[iftype];
cb2d956d
LC		 1697 }
1698 }
1699
e227300c
PK		 1700 if (params->radar_detect !=
1701 (c->radar_detect_widths & params->radar_detect))
cb2d956d
LC		 1702 goto cont;
1703
e227300c 1704 if (params->radar_detect && c->radar_detect_regions &&
8c48b50a
FF		 1705 !(c->radar_detect_regions & BIT(region)))
1706 goto cont;
1707
cb2d956d
LC		 1708 /* Finally check that all iftypes that we're currently
1709 * using are actually part of this combination. If they
1710 * aren't then we can't use this combination and have
1711 * to continue to the next.
1712 */
1713 if ((all_iftypes & used_iftypes) != used_iftypes)
1714 goto cont;
1715
4c8dea63 1716 if (beacon_int_gcd) {
0c317a02 1717 if (c->beacon_int_min_gcd &&
4c8dea63 1718 beacon_int_gcd < c->beacon_int_min_gcd)
0507a3ac 1719 goto cont;
4c8dea63 1720 if (!c->beacon_int_min_gcd && beacon_int_different)
0c317a02
PK		 1721 goto cont;
1722 }
1723
cb2d956d
LC		 1724 /* This combination covered all interface types and
1725 * supported the requested numbers, so we're good.
1726 */
65a124dd
MK		 1727
1728 (*iter)(c, data);
cb2d956d
LC		 1729 cont:
1730 kfree(limits);
1731 }
1732
65a124dd
MK		 1733 return 0;
1734}
1735EXPORT_SYMBOL(cfg80211_iter_combinations);
1736
1737static void
1738cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1739 void *data)
1740{
1741 int *num = data;
1742 (*num)++;
1743}
1744
1745int cfg80211_check_combinations(struct wiphy *wiphy,
e227300c 1746 struct iface_combination_params *params)
65a124dd
MK		 1747{
1748 int err, num = 0;
1749
e227300c 1750 err = cfg80211_iter_combinations(wiphy, params,
65a124dd
MK		 1751 cfg80211_iter_sum_ifcombs, &num);
1752 if (err)
1753 return err;
1754 if (num == 0)
1755 return -EBUSY;
1756
1757 return 0;
cb2d956d
LC		 1758}
1759EXPORT_SYMBOL(cfg80211_check_combinations);
1760
34850ab2
JB		 1761int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1762 const u8 *rates, unsigned int n_rates,
1763 u32 *mask)
1764{
1765 int i, j;
1766
a401d2bb
JB		 1767 if (!sband)
1768 return -EINVAL;
1769
34850ab2
JB		 1770 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1771 return -EINVAL;
1772
1773 *mask = 0;
1774
1775 for (i = 0; i < n_rates; i++) {
1776 int rate = (rates[i] & 0x7f) * 5;
1777 bool found = false;
1778
1779 for (j = 0; j < sband->n_bitrates; j++) {
1780 if (sband->bitrates[j].bitrate == rate) {
1781 found = true;
1782 *mask |= BIT(j);
1783 break;
1784 }
1785 }
1786 if (!found)
1787 return -EINVAL;
1788 }
1789
1790 /*
1791 * mask must have at least one bit set here since we
1792 * didn't accept a 0-length rates array nor allowed
1793 * entries in the array that didn't exist
1794 */
1795
1796 return 0;
1797}
11a2a357 1798
bdfbec2d
IP		 1799unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1800{
57fbcce3 1801 enum nl80211_band band;
bdfbec2d
IP		 1802 unsigned int n_channels = 0;
1803
57fbcce3 1804 for (band = 0; band < NUM_NL80211_BANDS; band++)
bdfbec2d
IP		 1805 if (wiphy->bands[band])
1806 n_channels += wiphy->bands[band]->n_channels;
1807
1808 return n_channels;
1809}
1810EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1811
7406353d
AQ		 1812int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1813 struct station_info *sinfo)
1814{
1815 struct cfg80211_registered_device *rdev;
1816 struct wireless_dev *wdev;
1817
1818 wdev = dev->ieee80211_ptr;
1819 if (!wdev)
1820 return -EOPNOTSUPP;
1821
1822 rdev = wiphy_to_rdev(wdev->wiphy);
1823 if (!rdev->ops->get_station)
1824 return -EOPNOTSUPP;
1825
1826 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1827}
1828EXPORT_SYMBOL(cfg80211_get_station);
1829
a442b761
AB		 1830void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
1831{
1832 int i;
1833
1834 if (!f)
1835 return;
1836
1837 kfree(f->serv_spec_info);
1838 kfree(f->srf_bf);
1839 kfree(f->srf_macs);
1840 for (i = 0; i < f->num_rx_filters; i++)
1841 kfree(f->rx_filters[i].filter);
1842
1843 for (i = 0; i < f->num_tx_filters; i++)
1844 kfree(f->tx_filters[i].filter);
1845
1846 kfree(f->rx_filters);
1847 kfree(f->tx_filters);
1848 kfree(f);
1849}
1850EXPORT_SYMBOL(cfg80211_free_nan_func);
1851
4787cfa0
RM		 1852bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
1853 u32 center_freq_khz, u32 bw_khz)
1854{
1855 u32 start_freq_khz, end_freq_khz;
1856
1857 start_freq_khz = center_freq_khz - (bw_khz / 2);
1858 end_freq_khz = center_freq_khz + (bw_khz / 2);
1859
1860 if (start_freq_khz >= freq_range->start_freq_khz &&
1861 end_freq_khz <= freq_range->end_freq_khz)
1862 return true;
1863
1864 return false;
1865}
1866
11a2a357
JB		 1867/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1868/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1869const unsigned char rfc1042_header[] __aligned(2) =
1870 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1871EXPORT_SYMBOL(rfc1042_header);
1872
1873/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1874const unsigned char bridge_tunnel_header[] __aligned(2) =
1875 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1876EXPORT_SYMBOL(bridge_tunnel_header);
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