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Merge tag 'iio-for-4.13b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
[mirror_ubuntu-artful-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 456
5667c86a
RM		 457 mesh_flags &= MESH_FLAGS_AE;
458
e31a16d6
ZY		 459 switch (hdr->frame_control &
460 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
461 case cpu_to_le16(IEEE80211_FCTL_TODS):
462 if (unlikely(iftype != NL80211_IFTYPE_AP &&
074ac8df
JB		 463 iftype != NL80211_IFTYPE_AP_VLAN &&
464 iftype != NL80211_IFTYPE_P2P_GO))
e31a16d6
ZY		 465 return -1;
466 break;
467 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
468 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
f14543ee
FF		 469 iftype != NL80211_IFTYPE_MESH_POINT &&
470 iftype != NL80211_IFTYPE_AP_VLAN &&
471 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 472 return -1;
473 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 474 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f 475 return -1;
5667c86a 476 if (mesh_flags == MESH_FLAGS_AE_A5_A6) {
e3cf8b3f
ZY		 477 skb_copy_bits(skb, hdrlen +
478 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c 479 tmp.h_dest, 2 * ETH_ALEN);
e31a16d6 480 }
2d1c304c 481 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
e31a16d6
ZY		 482 }
483 break;
484 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5 485 if ((iftype != NL80211_IFTYPE_STATION &&
074ac8df
JB		 486 iftype != NL80211_IFTYPE_P2P_CLIENT &&
487 iftype != NL80211_IFTYPE_MESH_POINT) ||
2d1c304c
FF		 488 (is_multicast_ether_addr(tmp.h_dest) &&
489 ether_addr_equal(tmp.h_source, addr)))
e31a16d6 490 return -1;
3c5772a5 491 if (iftype == NL80211_IFTYPE_MESH_POINT) {
5667c86a 492 if (mesh_flags == MESH_FLAGS_AE_A5_A6)
7dd111e8 493 return -1;
5667c86a 494 if (mesh_flags == MESH_FLAGS_AE_A4)
e3cf8b3f
ZY		 495 skb_copy_bits(skb, hdrlen +
496 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c
FF		 497 tmp.h_source, ETH_ALEN);
498 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
3c5772a5 499 }
e31a16d6
ZY		 500 break;
501 case cpu_to_le16(0):
941c93cd 502 if (iftype != NL80211_IFTYPE_ADHOC &&
6e0bd6c3
RL		 503 iftype != NL80211_IFTYPE_STATION &&
504 iftype != NL80211_IFTYPE_OCB)
941c93cd 505 return -1;
e31a16d6
ZY		 506 break;
507 }
508
2d1c304c
FF		 509 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
510 tmp.h_proto = payload.proto;
e31a16d6 511
2d1c304c
FF		 512 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
513 tmp.h_proto != htons(ETH_P_AARP) &&
514 tmp.h_proto != htons(ETH_P_IPX)) ||
515 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
e31a16d6
ZY		 516 /* remove RFC1042 or Bridge-Tunnel encapsulation and
517 * replace EtherType */
2d1c304c
FF		 518 hdrlen += ETH_ALEN + 2;
519 else
c041778c 520 tmp.h_proto = htons(skb->len - hdrlen);
2d1c304c
FF		 521
522 pskb_pull(skb, hdrlen);
e31a16d6 523
2d1c304c 524 if (!ehdr)
e31a16d6 525 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
2d1c304c
FF		 526 memcpy(ehdr, &tmp, sizeof(tmp));
527
e31a16d6
ZY		 528 return 0;
529}
7f6990c8 530EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
e31a16d6 531
eaf85ca7 532int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
c1e5f471
JB		 533 enum nl80211_iftype iftype,
534 const u8 *bssid, bool qos)
e31a16d6
ZY		 535{
536 struct ieee80211_hdr hdr;
537 u16 hdrlen, ethertype;
538 __le16 fc;
539 const u8 *encaps_data;
540 int encaps_len, skip_header_bytes;
541 int nh_pos, h_pos;
542 int head_need;
543
544 if (unlikely(skb->len < ETH_HLEN))
545 return -EINVAL;
546
547 nh_pos = skb_network_header(skb) - skb->data;
548 h_pos = skb_transport_header(skb) - skb->data;
549
550 /* convert Ethernet header to proper 802.11 header (based on
551 * operation mode) */
552 ethertype = (skb->data[12] << 8) | skb->data[13];
553 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
554
555 switch (iftype) {
556 case NL80211_IFTYPE_AP:
557 case NL80211_IFTYPE_AP_VLAN:
074ac8df 558 case NL80211_IFTYPE_P2P_GO:
e31a16d6
ZY		 559 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
560 /* DA BSSID SA */
561 memcpy(hdr.addr1, skb->data, ETH_ALEN);
562 memcpy(hdr.addr2, addr, ETH_ALEN);
563 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
564 hdrlen = 24;
565 break;
566 case NL80211_IFTYPE_STATION:
074ac8df 567 case NL80211_IFTYPE_P2P_CLIENT:
e31a16d6
ZY		 568 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
569 /* BSSID SA DA */
570 memcpy(hdr.addr1, bssid, ETH_ALEN);
571 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
572 memcpy(hdr.addr3, skb->data, ETH_ALEN);
573 hdrlen = 24;
574 break;
6e0bd6c3 575 case NL80211_IFTYPE_OCB:
e31a16d6
ZY		 576 case NL80211_IFTYPE_ADHOC:
577 /* DA SA BSSID */
578 memcpy(hdr.addr1, skb->data, ETH_ALEN);
579 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
580 memcpy(hdr.addr3, bssid, ETH_ALEN);
581 hdrlen = 24;
582 break;
583 default:
584 return -EOPNOTSUPP;
585 }
586
587 if (qos) {
588 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
589 hdrlen += 2;
590 }
591
592 hdr.frame_control = fc;
593 hdr.duration_id = 0;
594 hdr.seq_ctrl = 0;
595
596 skip_header_bytes = ETH_HLEN;
597 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
598 encaps_data = bridge_tunnel_header;
599 encaps_len = sizeof(bridge_tunnel_header);
600 skip_header_bytes -= 2;
e5c5d22e 601 } else if (ethertype >= ETH_P_802_3_MIN) {
e31a16d6
ZY		 602 encaps_data = rfc1042_header;
603 encaps_len = sizeof(rfc1042_header);
604 skip_header_bytes -= 2;
605 } else {
606 encaps_data = NULL;
607 encaps_len = 0;
608 }
609
610 skb_pull(skb, skip_header_bytes);
611 nh_pos -= skip_header_bytes;
612 h_pos -= skip_header_bytes;
613
614 head_need = hdrlen + encaps_len - skb_headroom(skb);
615
616 if (head_need > 0 || skb_cloned(skb)) {
617 head_need = max(head_need, 0);
618 if (head_need)
619 skb_orphan(skb);
620
24616152 621 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
e31a16d6 622 return -ENOMEM;
e31a16d6
ZY		 623 }
624
625 if (encaps_data) {
626 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
627 nh_pos += encaps_len;
628 h_pos += encaps_len;
629 }
630
631 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
632
633 nh_pos += hdrlen;
634 h_pos += hdrlen;
635
636 /* Update skb pointers to various headers since this modified frame
637 * is going to go through Linux networking code that may potentially
638 * need things like pointer to IP header. */
3ef523ae 639 skb_reset_mac_header(skb);
e31a16d6
ZY		 640 skb_set_network_header(skb, nh_pos);
641 skb_set_transport_header(skb, h_pos);
642
643 return 0;
644}
645EXPORT_SYMBOL(ieee80211_data_from_8023);
646
2b67f944
FF		 647static void
648__frame_add_frag(struct sk_buff *skb, struct page *page,
649 void *ptr, int len, int size)
650{
651 struct skb_shared_info *sh = skb_shinfo(skb);
652 int page_offset;
653
6d061f9f 654 page_ref_inc(page);
2b67f944
FF		 655 page_offset = ptr - page_address(page);
656 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
657}
658
659static void
660__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
661 int offset, int len)
662{
663 struct skb_shared_info *sh = skb_shinfo(skb);
aa1702dd 664 const skb_frag_t *frag = &sh->frags[0];
2b67f944
FF		 665 struct page *frag_page;
666 void *frag_ptr;
667 int frag_len, frag_size;
668 int head_size = skb->len - skb->data_len;
669 int cur_len;
670
671 frag_page = virt_to_head_page(skb->head);
672 frag_ptr = skb->data;
673 frag_size = head_size;
674
675 while (offset >= frag_size) {
676 offset -= frag_size;
2b67f944
FF		 677 frag_page = skb_frag_page(frag);
678 frag_ptr = skb_frag_address(frag);
679 frag_size = skb_frag_size(frag);
aa1702dd 680 frag++;
2b67f944
FF		 681 }
682
683 frag_ptr += offset;
684 frag_len = frag_size - offset;
685
686 cur_len = min(len, frag_len);
687
688 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
689 len -= cur_len;
690
691 while (len > 0) {
2b67f944
FF		 692 frag_len = skb_frag_size(frag);
693 cur_len = min(len, frag_len);
694 __frame_add_frag(frame, skb_frag_page(frag),
695 skb_frag_address(frag), cur_len, frag_len);
696 len -= cur_len;
aa1702dd 697 frag++;
2b67f944
FF		 698 }
699}
700
230fd28a
FF		 701static struct sk_buff *
702__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
2b67f944 703 int offset, int len, bool reuse_frag)
230fd28a
FF		 704{
705 struct sk_buff *frame;
2b67f944 706 int cur_len = len;
230fd28a
FF		 707
708 if (skb->len - offset < len)
709 return NULL;
710
2b67f944
FF		 711 /*
712 * When reusing framents, copy some data to the head to simplify
713 * ethernet header handling and speed up protocol header processing
714 * in the stack later.
715 */
716 if (reuse_frag)
717 cur_len = min_t(int, len, 32);
718
230fd28a
FF		 719 /*
720 * Allocate and reserve two bytes more for payload
721 * alignment since sizeof(struct ethhdr) is 14.
722 */
2b67f944 723 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
16a910a6
GG		 724 if (!frame)
725 return NULL;
230fd28a
FF		 726
727 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
2b67f944
FF		 728 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
729
730 len -= cur_len;
731 if (!len)
732 return frame;
733
734 offset += cur_len;
735 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
230fd28a
FF		 736
737 return frame;
738}
eaf85ca7
ZY		 739
740void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
741 const u8 *addr, enum nl80211_iftype iftype,
8b3becad 742 const unsigned int extra_headroom,
8b935ee2 743 const u8 *check_da, const u8 *check_sa)
eaf85ca7 744{
230fd28a 745 unsigned int hlen = ALIGN(extra_headroom, 4);
eaf85ca7
ZY		 746 struct sk_buff *frame = NULL;
747 u16 ethertype;
748 u8 *payload;
7f6990c8 749 int offset = 0, remaining;
230fd28a 750 struct ethhdr eth;
2b67f944 751 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
2bf0ccc7 752 bool reuse_skb = false;
230fd28a 753 bool last = false;
88665f5a 754
230fd28a
FF		 755 while (!last) {
756 unsigned int subframe_len;
757 int len;
eaf85ca7 758 u8 padding;
eaf85ca7 759
230fd28a
FF		 760 skb_copy_bits(skb, offset, &eth, sizeof(eth));
761 len = ntohs(eth.h_proto);
762 subframe_len = sizeof(struct ethhdr) + len;
eaf85ca7 763 padding = (4 - subframe_len) & 0x3;
230fd28a 764
eaf85ca7 765 /* the last MSDU has no padding */
230fd28a 766 remaining = skb->len - offset;
eaf85ca7
ZY		 767 if (subframe_len > remaining)
768 goto purge;
769
230fd28a 770 offset += sizeof(struct ethhdr);
230fd28a 771 last = remaining <= subframe_len + padding;
8b935ee2
JB		 772
773 /* FIXME: should we really accept multicast DA? */
774 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
775 !ether_addr_equal(check_da, eth.h_dest)) ||
776 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
777 offset += len + padding;
778 continue;
779 }
780
781 /* reuse skb for the last subframe */
2b67f944 782 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
230fd28a 783 skb_pull(skb, offset);
eaf85ca7 784 frame = skb;
230fd28a
FF		 785 reuse_skb = true;
786 } else {
2b67f944
FF		 787 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
788 reuse_frag);
eaf85ca7
ZY		 789 if (!frame)
790 goto purge;
791
230fd28a 792 offset += len + padding;
eaf85ca7
ZY		 793 }
794
795 skb_reset_network_header(frame);
796 frame->dev = skb->dev;
797 frame->priority = skb->priority;
798
799 payload = frame->data;
800 ethertype = (payload[6] << 8) | payload[7];
ac422d3c 801 if (likely((ether_addr_equal(payload, rfc1042_header) &&
eaf85ca7 802 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
ac422d3c 803 ether_addr_equal(payload, bridge_tunnel_header))) {
230fd28a
FF		 804 eth.h_proto = htons(ethertype);
805 skb_pull(frame, ETH_ALEN + 2);
eaf85ca7 806 }
230fd28a
FF		 807
808 memcpy(skb_push(frame, sizeof(eth)), &eth, sizeof(eth));
eaf85ca7
ZY		 809 __skb_queue_tail(list, frame);
810 }
811
230fd28a
FF		 812 if (!reuse_skb)
813 dev_kfree_skb(skb);
814
eaf85ca7
ZY		 815 return;
816
817 purge:
818 __skb_queue_purge(list);
eaf85ca7
ZY		 819 dev_kfree_skb(skb);
820}
821EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
822
e31a16d6 823/* Given a data frame determine the 802.1p/1d tag to use. */
fa9ffc74
KP		 824unsigned int cfg80211_classify8021d(struct sk_buff *skb,
825 struct cfg80211_qos_map *qos_map)
e31a16d6
ZY		 826{
827 unsigned int dscp;
c6ca5e28 828 unsigned char vlan_priority;
e31a16d6
ZY		 829
830 /* skb->priority values from 256->263 are magic values to
831 * directly indicate a specific 802.1d priority. This is used
832 * to allow 802.1d priority to be passed directly in from VLAN
833 * tags, etc.
834 */
835 if (skb->priority >= 256 && skb->priority <= 263)
836 return skb->priority - 256;
837
df8a39de
JP		 838 if (skb_vlan_tag_present(skb)) {
839 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
c6ca5e28
V		 840 >> VLAN_PRIO_SHIFT;
841 if (vlan_priority > 0)
842 return vlan_priority;
843 }
844
e31a16d6
ZY		 845 switch (skb->protocol) {
846 case htons(ETH_P_IP):
b156579b
DT		 847 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
848 break;
849 case htons(ETH_P_IPV6):
850 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
e31a16d6 851 break;
960d97f9
SW		 852 case htons(ETH_P_MPLS_UC):
853 case htons(ETH_P_MPLS_MC): {
854 struct mpls_label mpls_tmp, *mpls;
855
856 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
857 sizeof(*mpls), &mpls_tmp);
858 if (!mpls)
859 return 0;
860
861 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
862 >> MPLS_LS_TC_SHIFT;
863 }
864 case htons(ETH_P_80221):
865 /* 802.21 is always network control traffic */
866 return 7;
e31a16d6
ZY		 867 default:
868 return 0;
869 }
870
fa9ffc74
KP		 871 if (qos_map) {
872 unsigned int i, tmp_dscp = dscp >> 2;
873
874 for (i = 0; i < qos_map->num_des; i++) {
875 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
876 return qos_map->dscp_exception[i].up;
877 }
878
879 for (i = 0; i < 8; i++) {
880 if (tmp_dscp >= qos_map->up[i].low &&
881 tmp_dscp <= qos_map->up[i].high)
882 return i;
883 }
884 }
885
e31a16d6
ZY		 886 return dscp >> 5;
887}
888EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6
JB		 889
890const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
891{
9caf0364
JB		 892 const struct cfg80211_bss_ies *ies;
893
894 ies = rcu_dereference(bss->ies);
895 if (!ies)
517357c6 896 return NULL;
9caf0364
JB		 897
898 return cfg80211_find_ie(ie, ies->data, ies->len);
517357c6
JB		 899}
900EXPORT_SYMBOL(ieee80211_bss_get_ie);
fffd0934
JB		 901
902void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
903{
f26cbf40 904 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934
JB		 905 struct net_device *dev = wdev->netdev;
906 int i;
907
908 if (!wdev->connect_keys)
909 return;
910
b8676221 911 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
fffd0934
JB		 912 if (!wdev->connect_keys->params[i].cipher)
913 continue;
e35e4d28
HG		 914 if (rdev_add_key(rdev, dev, i, false, NULL,
915 &wdev->connect_keys->params[i])) {
e9c0268f 916 netdev_err(dev, "failed to set key %d\n", i);
1e056665
ZY		 917 continue;
918 }
d4f29978
JB		 919 if (wdev->connect_keys->def == i &&
920 rdev_set_default_key(rdev, dev, i, true, true)) {
921 netdev_err(dev, "failed to set defkey %d\n", i);
922 continue;
923 }
fffd0934
JB		 924 }
925
b47f610b 926 kzfree(wdev->connect_keys);
fffd0934
JB		 927 wdev->connect_keys = NULL;
928}
3d54d255 929
1f6fc43e 930void cfg80211_process_wdev_events(struct wireless_dev *wdev)
3d54d255
JB		 931{
932 struct cfg80211_event *ev;
933 unsigned long flags;
3d54d255
JB		 934
935 spin_lock_irqsave(&wdev->event_lock, flags);
936 while (!list_empty(&wdev->event_list)) {
937 ev = list_first_entry(&wdev->event_list,
938 struct cfg80211_event, list);
939 list_del(&ev->list);
940 spin_unlock_irqrestore(&wdev->event_lock, flags);
941
942 wdev_lock(wdev);
943 switch (ev->type) {
944 case EVENT_CONNECT_RESULT:
3d54d255 945 __cfg80211_connect_result(
5349a0f7
VK		 946 wdev->netdev,
947 &ev->cr,
948 ev->cr.status == WLAN_STATUS_SUCCESS);
3d54d255
JB		 949 break;
950 case EVENT_ROAMED:
29ce6ecb 951 __cfg80211_roamed(wdev, &ev->rm);
3d54d255
JB		 952 break;
953 case EVENT_DISCONNECTED:
954 __cfg80211_disconnected(wdev->netdev,
955 ev->dc.ie, ev->dc.ie_len,
80279fb7
JB		 956 ev->dc.reason,
957 !ev->dc.locally_generated);
3d54d255
JB		 958 break;
959 case EVENT_IBSS_JOINED:
fe94f3a4
AQ		 960 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
961 ev->ij.channel);
3d54d255 962 break;
f04c2203
MK		 963 case EVENT_STOPPED:
964 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
965 break;
3d54d255
JB		 966 }
967 wdev_unlock(wdev);
968
969 kfree(ev);
970
971 spin_lock_irqsave(&wdev->event_lock, flags);
972 }
973 spin_unlock_irqrestore(&wdev->event_lock, flags);
974}
975
976void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
977{
978 struct wireless_dev *wdev;
979
980 ASSERT_RTNL();
3d54d255 981
53873f13 982 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
3d54d255 983 cfg80211_process_wdev_events(wdev);
3d54d255
JB		 984}
985
986int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
987 struct net_device *dev, enum nl80211_iftype ntype,
818a986e 988 struct vif_params *params)
3d54d255
JB		 989{
990 int err;
991 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
992
73fb08e2 993 ASSERT_RTNL();
3d54d255
JB		 994
995 /* don't support changing VLANs, you just re-create them */
996 if (otype == NL80211_IFTYPE_AP_VLAN)
997 return -EOPNOTSUPP;
998
cb3b7d87
AB		 999 /* cannot change into P2P device or NAN */
1000 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
1001 ntype == NL80211_IFTYPE_NAN)
98104fde
JB		 1002 return -EOPNOTSUPP;
1003
3d54d255
JB		 1004 if (!rdev->ops->change_virtual_intf ||
1005 !(rdev->wiphy.interface_modes & (1 << ntype)))
1006 return -EOPNOTSUPP;
1007
ad4bb6f8 1008 /* if it's part of a bridge, reject changing type to station/ibss */
f350a0a8 1009 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
074ac8df
JB		 1010 (ntype == NL80211_IFTYPE_ADHOC ||
1011 ntype == NL80211_IFTYPE_STATION ||
1012 ntype == NL80211_IFTYPE_P2P_CLIENT))
ad4bb6f8
JB		 1013 return -EBUSY;
1014
6cbfb1bb 1015 if (ntype != otype) {
9bc383de 1016 dev->ieee80211_ptr->use_4addr = false;
29cbe68c 1017 dev->ieee80211_ptr->mesh_id_up_len = 0;
194ff52d 1018 wdev_lock(dev->ieee80211_ptr);
fa9ffc74 1019 rdev_set_qos_map(rdev, dev, NULL);
194ff52d 1020 wdev_unlock(dev->ieee80211_ptr);
9bc383de 1021
3d54d255 1022 switch (otype) {
ac800140 1023 case NL80211_IFTYPE_AP:
7c8d5e03 1024 cfg80211_stop_ap(rdev, dev, true);
ac800140 1025 break;
3d54d255
JB		 1026 case NL80211_IFTYPE_ADHOC:
1027 cfg80211_leave_ibss(rdev, dev, false);
1028 break;
1029 case NL80211_IFTYPE_STATION:
074ac8df 1030 case NL80211_IFTYPE_P2P_CLIENT:
83739b03 1031 wdev_lock(dev->ieee80211_ptr);
3d54d255
JB		 1032 cfg80211_disconnect(rdev, dev,
1033 WLAN_REASON_DEAUTH_LEAVING, true);
83739b03 1034 wdev_unlock(dev->ieee80211_ptr);
3d54d255
JB		 1035 break;
1036 case NL80211_IFTYPE_MESH_POINT:
1037 /* mesh should be handled? */
1038 break;
1039 default:
1040 break;
1041 }
1042
1043 cfg80211_process_rdev_events(rdev);
1044 }
1045
818a986e 1046 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
3d54d255
JB		 1047
1048 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1049
9bc383de
JB		 1050 if (!err && params && params->use_4addr != -1)
1051 dev->ieee80211_ptr->use_4addr = params->use_4addr;
1052
ad4bb6f8
JB		 1053 if (!err) {
1054 dev->priv_flags &= ~IFF_DONT_BRIDGE;
1055 switch (ntype) {
1056 case NL80211_IFTYPE_STATION:
1057 if (dev->ieee80211_ptr->use_4addr)
1058 break;
1059 /* fall through */
6e0bd6c3 1060 case NL80211_IFTYPE_OCB:
074ac8df 1061 case NL80211_IFTYPE_P2P_CLIENT:
ad4bb6f8
JB		 1062 case NL80211_IFTYPE_ADHOC:
1063 dev->priv_flags |= IFF_DONT_BRIDGE;
1064 break;
074ac8df 1065 case NL80211_IFTYPE_P2P_GO:
ad4bb6f8
JB		 1066 case NL80211_IFTYPE_AP:
1067 case NL80211_IFTYPE_AP_VLAN:
1068 case NL80211_IFTYPE_WDS:
1069 case NL80211_IFTYPE_MESH_POINT:
1070 /* bridging OK */
1071 break;
1072 case NL80211_IFTYPE_MONITOR:
1073 /* monitor can't bridge anyway */
1074 break;
1075 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1076 case NUM_NL80211_IFTYPES:
ad4bb6f8
JB		 1077 /* not happening */
1078 break;
98104fde 1079 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 1080 case NL80211_IFTYPE_NAN:
98104fde
JB		 1081 WARN_ON(1);
1082 break;
ad4bb6f8
JB		 1083 }
1084 }
1085
dbbae26a
MK		 1086 if (!err && ntype != otype && netif_running(dev)) {
1087 cfg80211_update_iface_num(rdev, ntype, 1);
1088 cfg80211_update_iface_num(rdev, otype, -1);
1089 }
1090
3d54d255
JB		 1091 return err;
1092}
254416aa 1093
0c1eca4e
JB		 1094static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
1095{
1096 int modulation, streams, bitrate;
1097
1098 /* the formula below does only work for MCS values smaller than 32 */
1099 if (WARN_ON_ONCE(rate->mcs >= 32))
1100 return 0;
1101
1102 modulation = rate->mcs & 7;
1103 streams = (rate->mcs >> 3) + 1;
1104
1105 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1106
1107 if (modulation < 4)
1108 bitrate *= (modulation + 1);
1109 else if (modulation == 4)
1110 bitrate *= (modulation + 2);
1111 else
1112 bitrate *= (modulation + 3);
1113
1114 bitrate *= streams;
1115
1116 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1117 bitrate = (bitrate / 9) * 10;
1118
1119 /* do NOT round down here */
1120 return (bitrate + 50000) / 100000;
1121}
1122
95ddc1fc
VK		 1123static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1124{
1125 static const u32 __mcs2bitrate[] = {
1126 /* control PHY */
1127 [0] = 275,
1128 /* SC PHY */
1129 [1] = 3850,
1130 [2] = 7700,
1131 [3] = 9625,
1132 [4] = 11550,
1133 [5] = 12512, /* 1251.25 mbps */
1134 [6] = 15400,
1135 [7] = 19250,
1136 [8] = 23100,
1137 [9] = 25025,
1138 [10] = 30800,
1139 [11] = 38500,
1140 [12] = 46200,
1141 /* OFDM PHY */
1142 [13] = 6930,
1143 [14] = 8662, /* 866.25 mbps */
1144 [15] = 13860,
1145 [16] = 17325,
1146 [17] = 20790,
1147 [18] = 27720,
1148 [19] = 34650,
1149 [20] = 41580,
1150 [21] = 45045,
1151 [22] = 51975,
1152 [23] = 62370,
1153 [24] = 67568, /* 6756.75 mbps */
1154 /* LP-SC PHY */
1155 [25] = 6260,
1156 [26] = 8340,
1157 [27] = 11120,
1158 [28] = 12510,
1159 [29] = 16680,
1160 [30] = 22240,
1161 [31] = 25030,
1162 };
1163
1164 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1165 return 0;
1166
1167 return __mcs2bitrate[rate->mcs];
1168}
1169
db9c64cf
JB		 1170static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1171{
1172 static const u32 base[4][10] = {
1173 { 6500000,
1174 13000000,
1175 19500000,
1176 26000000,
1177 39000000,
1178 52000000,
1179 58500000,
1180 65000000,
1181 78000000,
8fdd136f
PT		 1182 /* not in the spec, but some devices use this: */
1183 86500000,
db9c64cf
JB		 1184 },
1185 { 13500000,
1186 27000000,
1187 40500000,
1188 54000000,
1189 81000000,
1190 108000000,
1191 121500000,
1192 135000000,
1193 162000000,
1194 180000000,
1195 },
1196 { 29300000,
1197 58500000,
1198 87800000,
1199 117000000,
1200 175500000,
1201 234000000,
1202 263300000,
1203 292500000,
1204 351000000,
1205 390000000,
1206 },
1207 { 58500000,
1208 117000000,
1209 175500000,
1210 234000000,
1211 351000000,
1212 468000000,
1213 526500000,
1214 585000000,
1215 702000000,
1216 780000000,
1217 },
1218 };
1219 u32 bitrate;
1220 int idx;
1221
1222 if (WARN_ON_ONCE(rate->mcs > 9))
1223 return 0;
1224
b51f3bee
JB		 1225 switch (rate->bw) {
1226 case RATE_INFO_BW_160:
1227 idx = 3;
1228 break;
1229 case RATE_INFO_BW_80:
1230 idx = 2;
1231 break;
1232 case RATE_INFO_BW_40:
1233 idx = 1;
1234 break;
1235 case RATE_INFO_BW_5:
1236 case RATE_INFO_BW_10:
1237 default:
1238 WARN_ON(1);
1239 /* fall through */
1240 case RATE_INFO_BW_20:
1241 idx = 0;
1242 }
db9c64cf
JB		 1243
1244 bitrate = base[idx][rate->mcs];
1245 bitrate *= rate->nss;
1246
1247 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1248 bitrate = (bitrate / 9) * 10;
1249
1250 /* do NOT round down here */
1251 return (bitrate + 50000) / 100000;
1252}
1253
8eb41c8d 1254u32 cfg80211_calculate_bitrate(struct rate_info *rate)
254416aa 1255{
0c1eca4e
JB		 1256 if (rate->flags & RATE_INFO_FLAGS_MCS)
1257 return cfg80211_calculate_bitrate_ht(rate);
95ddc1fc
VK		 1258 if (rate->flags & RATE_INFO_FLAGS_60G)
1259 return cfg80211_calculate_bitrate_60g(rate);
db9c64cf
JB		 1260 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1261 return cfg80211_calculate_bitrate_vht(rate);
254416aa 1262
0c1eca4e 1263 return rate->legacy;
254416aa 1264}
8097e149 1265EXPORT_SYMBOL(cfg80211_calculate_bitrate);
56d1893d 1266
c216e641
AS		 1267int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1268 enum ieee80211_p2p_attr_id attr,
1269 u8 *buf, unsigned int bufsize)
0ee45355
JB		 1270{
1271 u8 *out = buf;
1272 u16 attr_remaining = 0;
1273 bool desired_attr = false;
1274 u16 desired_len = 0;
1275
1276 while (len > 0) {
1277 unsigned int iedatalen;
1278 unsigned int copy;
1279 const u8 *iedata;
1280
1281 if (len < 2)
1282 return -EILSEQ;
1283 iedatalen = ies[1];
1284 if (iedatalen + 2 > len)
1285 return -EILSEQ;
1286
1287 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1288 goto cont;
1289
1290 if (iedatalen < 4)
1291 goto cont;
1292
1293 iedata = ies + 2;
1294
1295 /* check WFA OUI, P2P subtype */
1296 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1297 iedata[2] != 0x9a || iedata[3] != 0x09)
1298 goto cont;
1299
1300 iedatalen -= 4;
1301 iedata += 4;
1302
1303 /* check attribute continuation into this IE */
1304 copy = min_t(unsigned int, attr_remaining, iedatalen);
1305 if (copy && desired_attr) {
1306 desired_len += copy;
1307 if (out) {
1308 memcpy(out, iedata, min(bufsize, copy));
1309 out += min(bufsize, copy);
1310 bufsize -= min(bufsize, copy);
1311 }
1312
1313
1314 if (copy == attr_remaining)
1315 return desired_len;
1316 }
1317
1318 attr_remaining -= copy;
1319 if (attr_remaining)
1320 goto cont;
1321
1322 iedatalen -= copy;
1323 iedata += copy;
1324
1325 while (iedatalen > 0) {
1326 u16 attr_len;
1327
1328 /* P2P attribute ID & size must fit */
1329 if (iedatalen < 3)
1330 return -EILSEQ;
1331 desired_attr = iedata[0] == attr;
1332 attr_len = get_unaligned_le16(iedata + 1);
1333 iedatalen -= 3;
1334 iedata += 3;
1335
1336 copy = min_t(unsigned int, attr_len, iedatalen);
1337
1338 if (desired_attr) {
1339 desired_len += copy;
1340 if (out) {
1341 memcpy(out, iedata, min(bufsize, copy));
1342 out += min(bufsize, copy);
1343 bufsize -= min(bufsize, copy);
1344 }
1345
1346 if (copy == attr_len)
1347 return desired_len;
1348 }
1349
1350 iedata += copy;
1351 iedatalen -= copy;
1352 attr_remaining = attr_len - copy;
1353 }
1354
1355 cont:
1356 len -= ies[1] + 2;
1357 ies += ies[1] + 2;
1358 }
1359
1360 if (attr_remaining && desired_attr)
1361 return -EILSEQ;
1362
1363 return -ENOENT;
1364}
1365EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1366
29464ccc
JB		 1367static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1368{
1369 int i;
1370
1371 for (i = 0; i < n_ids; i++)
1372 if (ids[i] == id)
1373 return true;
1374 return false;
1375}
1376
8ac63448
JB		 1377static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1378{
1379 /* we assume a validly formed IEs buffer */
1380 u8 len = ies[pos + 1];
1381
1382 pos += 2 + len;
1383
1384 /* the IE itself must have 255 bytes for fragments to follow */
1385 if (len < 255)
1386 return pos;
1387
1388 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1389 len = ies[pos + 1];
1390 pos += 2 + len;
1391 }
1392
1393 return pos;
1394}
1395
29464ccc
JB		 1396size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1397 const u8 *ids, int n_ids,
1398 const u8 *after_ric, int n_after_ric,
1399 size_t offset)
1400{
1401 size_t pos = offset;
1402
1403 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
1404 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
8ac63448 1405 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1406
1407 while (pos < ielen &&
1408 !ieee80211_id_in_list(after_ric, n_after_ric,
1409 ies[pos]))
8ac63448 1410 pos = skip_ie(ies, ielen, pos);
29464ccc 1411 } else {
8ac63448 1412 pos = skip_ie(ies, ielen, pos);
29464ccc
JB		 1413 }
1414 }
1415
1416 return pos;
1417}
1418EXPORT_SYMBOL(ieee80211_ie_split_ric);
1419
1ce3e82b 1420bool ieee80211_operating_class_to_band(u8 operating_class,
57fbcce3 1421 enum nl80211_band *band)
1ce3e82b
JB		 1422{
1423 switch (operating_class) {
1424 case 112:
1425 case 115 ... 127:
954a86ef 1426 case 128 ... 130:
57fbcce3 1427 *band = NL80211_BAND_5GHZ;
1ce3e82b
JB		 1428 return true;
1429 case 81:
1430 case 82:
1431 case 83:
1432 case 84:
57fbcce3 1433 *band = NL80211_BAND_2GHZ;
1ce3e82b 1434 return true;
55300a13 1435 case 180:
57fbcce3 1436 *band = NL80211_BAND_60GHZ;
55300a13 1437 return true;
1ce3e82b
JB		 1438 }
1439
1440 return false;
1441}
1442EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1443
a38700dd
AN		 1444bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1445 u8 *op_class)
1446{
1447 u8 vht_opclass;
1448 u16 freq = chandef->center_freq1;
1449
1450 if (freq >= 2412 && freq <= 2472) {
1451 if (chandef->width > NL80211_CHAN_WIDTH_40)
1452 return false;
1453
1454 /* 2.407 GHz, channels 1..13 */
1455 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1456 if (freq > chandef->chan->center_freq)
1457 *op_class = 83; /* HT40+ */
1458 else
1459 *op_class = 84; /* HT40- */
1460 } else {
1461 *op_class = 81;
1462 }
1463
1464 return true;
1465 }
1466
1467 if (freq == 2484) {
1468 if (chandef->width > NL80211_CHAN_WIDTH_40)
1469 return false;
1470
1471 *op_class = 82; /* channel 14 */
1472 return true;
1473 }
1474
1475 switch (chandef->width) {
1476 case NL80211_CHAN_WIDTH_80:
1477 vht_opclass = 128;
1478 break;
1479 case NL80211_CHAN_WIDTH_160:
1480 vht_opclass = 129;
1481 break;
1482 case NL80211_CHAN_WIDTH_80P80:
1483 vht_opclass = 130;
1484 break;
1485 case NL80211_CHAN_WIDTH_10:
1486 case NL80211_CHAN_WIDTH_5:
1487 return false; /* unsupported for now */
1488 default:
1489 vht_opclass = 0;
1490 break;
1491 }
1492
1493 /* 5 GHz, channels 36..48 */
1494 if (freq >= 5180 && freq <= 5240) {
1495 if (vht_opclass) {
1496 *op_class = vht_opclass;
1497 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1498 if (freq > chandef->chan->center_freq)
1499 *op_class = 116;
1500 else
1501 *op_class = 117;
1502 } else {
1503 *op_class = 115;
1504 }
1505
1506 return true;
1507 }
1508
1509 /* 5 GHz, channels 52..64 */
1510 if (freq >= 5260 && freq <= 5320) {
1511 if (vht_opclass) {
1512 *op_class = vht_opclass;
1513 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1514 if (freq > chandef->chan->center_freq)
1515 *op_class = 119;
1516 else
1517 *op_class = 120;
1518 } else {
1519 *op_class = 118;
1520 }
1521
1522 return true;
1523 }
1524
1525 /* 5 GHz, channels 100..144 */
1526 if (freq >= 5500 && freq <= 5720) {
1527 if (vht_opclass) {
1528 *op_class = vht_opclass;
1529 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1530 if (freq > chandef->chan->center_freq)
1531 *op_class = 122;
1532 else
1533 *op_class = 123;
1534 } else {
1535 *op_class = 121;
1536 }
1537
1538 return true;
1539 }
1540
1541 /* 5 GHz, channels 149..169 */
1542 if (freq >= 5745 && freq <= 5845) {
1543 if (vht_opclass) {
1544 *op_class = vht_opclass;
1545 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1546 if (freq > chandef->chan->center_freq)
1547 *op_class = 126;
1548 else
1549 *op_class = 127;
1550 } else if (freq <= 5805) {
1551 *op_class = 124;
1552 } else {
1553 *op_class = 125;
1554 }
1555
1556 return true;
1557 }
1558
1559 /* 56.16 GHz, channel 1..4 */
1560 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
1561 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1562 return false;
1563
1564 *op_class = 180;
1565 return true;
1566 }
1567
1568 /* not supported yet */
1569 return false;
1570}
1571EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1572
4c8dea63
JB		 1573static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1574 u32 *beacon_int_gcd,
1575 bool *beacon_int_different)
56d1893d
JB		 1576{
1577 struct wireless_dev *wdev;
56d1893d 1578
4c8dea63
JB		 1579 *beacon_int_gcd = 0;
1580 *beacon_int_different = false;
56d1893d 1581
4c8dea63 1582 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
56d1893d
JB		 1583 if (!wdev->beacon_interval)
1584 continue;
0c317a02 1585
4c8dea63
JB		 1586 if (!*beacon_int_gcd) {
1587 *beacon_int_gcd = wdev->beacon_interval;
0c317a02 1588 continue;
4c8dea63 1589 }
0c317a02 1590
4c8dea63 1591 if (wdev->beacon_interval == *beacon_int_gcd)
0c317a02
PK		 1592 continue;
1593
4c8dea63
JB		 1594 *beacon_int_different = true;
1595 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1596 }
0c317a02 1597
4c8dea63
JB		 1598 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1599 if (*beacon_int_gcd)
1600 *beacon_int_different = true;
1601 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
56d1893d 1602 }
4c8dea63 1603}
56d1893d 1604
4c8dea63
JB		 1605int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1606 enum nl80211_iftype iftype, u32 beacon_int)
1607{
1608 /*
1609 * This is just a basic pre-condition check; if interface combinations
1610 * are possible the driver must already be checking those with a call
1611 * to cfg80211_check_combinations(), in which case we'll validate more
1612 * through the cfg80211_calculate_bi_data() call and code in
1613 * cfg80211_iter_combinations().
1614 */
1615
1616 if (beacon_int < 10 || beacon_int > 10000)
1617 return -EINVAL;
1618
1619 return 0;
56d1893d 1620}
7527a782 1621
65a124dd 1622int cfg80211_iter_combinations(struct wiphy *wiphy,
e227300c 1623 struct iface_combination_params *params,
65a124dd
MK		 1624 void (*iter)(const struct ieee80211_iface_combination *c,
1625 void *data),
1626 void *data)
cb2d956d 1627{
8c48b50a
FF		 1628 const struct ieee80211_regdomain *regdom;
1629 enum nl80211_dfs_regions region = 0;
cb2d956d
LC		 1630 int i, j, iftype;
1631 int num_interfaces = 0;
1632 u32 used_iftypes = 0;
4c8dea63
JB		 1633 u32 beacon_int_gcd;
1634 bool beacon_int_different;
1635
1636 /*
1637 * This is a bit strange, since the iteration used to rely only on
1638 * the data given by the driver, but here it now relies on context,
1639 * in form of the currently operating interfaces.
1640 * This is OK for all current users, and saves us from having to
1641 * push the GCD calculations into all the drivers.
1642 * In the future, this should probably rely more on data that's in
1643 * cfg80211 already - the only thing not would appear to be any new
1644 * interfaces (while being brought up) and channel/radar data.
1645 */
1646 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1647 &beacon_int_gcd, &beacon_int_different);
cb2d956d 1648
e227300c 1649 if (params->radar_detect) {
8c48b50a
FF		 1650 rcu_read_lock();
1651 regdom = rcu_dereference(cfg80211_regdomain);
1652 if (regdom)
1653 region = regdom->dfs_region;
1654 rcu_read_unlock();
1655 }
1656
cb2d956d 1657 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
e227300c
PK		 1658 num_interfaces += params->iftype_num[iftype];
1659 if (params->iftype_num[iftype] > 0 &&
cb2d956d
LC		 1660 !(wiphy->software_iftypes & BIT(iftype)))
1661 used_iftypes |= BIT(iftype);
1662 }
1663
1664 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1665 const struct ieee80211_iface_combination *c;
1666 struct ieee80211_iface_limit *limits;
1667 u32 all_iftypes = 0;
1668
1669 c = &wiphy->iface_combinations[i];
1670
1671 if (num_interfaces > c->max_interfaces)
1672 continue;
e227300c 1673 if (params->num_different_channels > c->num_different_channels)
cb2d956d
LC		 1674 continue;
1675
1676 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1677 GFP_KERNEL);
1678 if (!limits)
1679 return -ENOMEM;
1680
1681 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1682 if (wiphy->software_iftypes & BIT(iftype))
1683 continue;
1684 for (j = 0; j < c->n_limits; j++) {
1685 all_iftypes |= limits[j].types;
1686 if (!(limits[j].types & BIT(iftype)))
1687 continue;
e227300c 1688 if (limits[j].max < params->iftype_num[iftype])
cb2d956d 1689 goto cont;
e227300c 1690 limits[j].max -= params->iftype_num[iftype];
cb2d956d
LC		 1691 }
1692 }
1693
e227300c
PK		 1694 if (params->radar_detect !=
1695 (c->radar_detect_widths & params->radar_detect))
cb2d956d
LC		 1696 goto cont;
1697
e227300c 1698 if (params->radar_detect && c->radar_detect_regions &&
8c48b50a
FF		 1699 !(c->radar_detect_regions & BIT(region)))
1700 goto cont;
1701
cb2d956d
LC		 1702 /* Finally check that all iftypes that we're currently
1703 * using are actually part of this combination. If they
1704 * aren't then we can't use this combination and have
1705 * to continue to the next.
1706 */
1707 if ((all_iftypes & used_iftypes) != used_iftypes)
1708 goto cont;
1709
4c8dea63 1710 if (beacon_int_gcd) {
0c317a02 1711 if (c->beacon_int_min_gcd &&
4c8dea63 1712 beacon_int_gcd < c->beacon_int_min_gcd)
0507a3ac 1713 goto cont;
4c8dea63 1714 if (!c->beacon_int_min_gcd && beacon_int_different)
0c317a02
PK		 1715 goto cont;
1716 }
1717
cb2d956d
LC		 1718 /* This combination covered all interface types and
1719 * supported the requested numbers, so we're good.
1720 */
65a124dd
MK		 1721
1722 (*iter)(c, data);
cb2d956d
LC		 1723 cont:
1724 kfree(limits);
1725 }
1726
65a124dd
MK		 1727 return 0;
1728}
1729EXPORT_SYMBOL(cfg80211_iter_combinations);
1730
1731static void
1732cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1733 void *data)
1734{
1735 int *num = data;
1736 (*num)++;
1737}
1738
1739int cfg80211_check_combinations(struct wiphy *wiphy,
e227300c 1740 struct iface_combination_params *params)
65a124dd
MK		 1741{
1742 int err, num = 0;
1743
e227300c 1744 err = cfg80211_iter_combinations(wiphy, params,
65a124dd
MK		 1745 cfg80211_iter_sum_ifcombs, &num);
1746 if (err)
1747 return err;
1748 if (num == 0)
1749 return -EBUSY;
1750
1751 return 0;
cb2d956d
LC		 1752}
1753EXPORT_SYMBOL(cfg80211_check_combinations);
1754
34850ab2
JB		 1755int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1756 const u8 *rates, unsigned int n_rates,
1757 u32 *mask)
1758{
1759 int i, j;
1760
a401d2bb
JB		 1761 if (!sband)
1762 return -EINVAL;
1763
34850ab2
JB		 1764 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1765 return -EINVAL;
1766
1767 *mask = 0;
1768
1769 for (i = 0; i < n_rates; i++) {
1770 int rate = (rates[i] & 0x7f) * 5;
1771 bool found = false;
1772
1773 for (j = 0; j < sband->n_bitrates; j++) {
1774 if (sband->bitrates[j].bitrate == rate) {
1775 found = true;
1776 *mask |= BIT(j);
1777 break;
1778 }
1779 }
1780 if (!found)
1781 return -EINVAL;
1782 }
1783
1784 /*
1785 * mask must have at least one bit set here since we
1786 * didn't accept a 0-length rates array nor allowed
1787 * entries in the array that didn't exist
1788 */
1789
1790 return 0;
1791}
11a2a357 1792
bdfbec2d
IP		 1793unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1794{
57fbcce3 1795 enum nl80211_band band;
bdfbec2d
IP		 1796 unsigned int n_channels = 0;
1797
57fbcce3 1798 for (band = 0; band < NUM_NL80211_BANDS; band++)
bdfbec2d
IP		 1799 if (wiphy->bands[band])
1800 n_channels += wiphy->bands[band]->n_channels;
1801
1802 return n_channels;
1803}
1804EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1805
7406353d
AQ		 1806int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1807 struct station_info *sinfo)
1808{
1809 struct cfg80211_registered_device *rdev;
1810 struct wireless_dev *wdev;
1811
1812 wdev = dev->ieee80211_ptr;
1813 if (!wdev)
1814 return -EOPNOTSUPP;
1815
1816 rdev = wiphy_to_rdev(wdev->wiphy);
1817 if (!rdev->ops->get_station)
1818 return -EOPNOTSUPP;
1819
1820 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1821}
1822EXPORT_SYMBOL(cfg80211_get_station);
1823
a442b761
AB		 1824void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
1825{
1826 int i;
1827
1828 if (!f)
1829 return;
1830
1831 kfree(f->serv_spec_info);
1832 kfree(f->srf_bf);
1833 kfree(f->srf_macs);
1834 for (i = 0; i < f->num_rx_filters; i++)
1835 kfree(f->rx_filters[i].filter);
1836
1837 for (i = 0; i < f->num_tx_filters; i++)
1838 kfree(f->tx_filters[i].filter);
1839
1840 kfree(f->rx_filters);
1841 kfree(f->tx_filters);
1842 kfree(f);
1843}
1844EXPORT_SYMBOL(cfg80211_free_nan_func);
1845
4787cfa0
RM		 1846bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
1847 u32 center_freq_khz, u32 bw_khz)
1848{
1849 u32 start_freq_khz, end_freq_khz;
1850
1851 start_freq_khz = center_freq_khz - (bw_khz / 2);
1852 end_freq_khz = center_freq_khz + (bw_khz / 2);
1853
1854 if (start_freq_khz >= freq_range->start_freq_khz &&
1855 end_freq_khz <= freq_range->end_freq_khz)
1856 return true;
1857
1858 return false;
1859}
1860
11a2a357
JB		 1861/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1862/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1863const unsigned char rfc1042_header[] __aligned(2) =
1864 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1865EXPORT_SYMBOL(rfc1042_header);
1866
1867/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1868const unsigned char bridge_tunnel_header[] __aligned(2) =
1869 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1870EXPORT_SYMBOL(bridge_tunnel_header);
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