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cfg80211: fix faulty variable initialization in ieee80211_amsdu_to_8023s
[deliverable/linux.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>
8318d78a 16#include "core.h"
e35e4d28
HG		 17#include "rdev-ops.h"
18
8318d78a 19
bd815252
JB		 20struct ieee80211_rate *
21ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
881d948c 22 u32 basic_rates, int bitrate)
bd815252
JB		 23{
24 struct ieee80211_rate *result = &sband->bitrates[0];
25 int i;
26
27 for (i = 0; i < sband->n_bitrates; i++) {
28 if (!(basic_rates & BIT(i)))
29 continue;
30 if (sband->bitrates[i].bitrate > bitrate)
31 continue;
32 result = &sband->bitrates[i];
33 }
34
35 return result;
36}
37EXPORT_SYMBOL(ieee80211_get_response_rate);
38
74608aca
SW		 39u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
40 enum nl80211_bss_scan_width scan_width)
b422c6cd
AN		 41{
42 struct ieee80211_rate *bitrates;
43 u32 mandatory_rates = 0;
44 enum ieee80211_rate_flags mandatory_flag;
45 int i;
46
47 if (WARN_ON(!sband))
48 return 1;
49
74608aca
SW		 50 if (sband->band == IEEE80211_BAND_2GHZ) {
51 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
52 scan_width == NL80211_BSS_CHAN_WIDTH_10)
53 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
54 else
55 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
56 } else {
b422c6cd 57 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
74608aca 58 }
b422c6cd
AN		 59
60 bitrates = sband->bitrates;
61 for (i = 0; i < sband->n_bitrates; i++)
62 if (bitrates[i].flags & mandatory_flag)
63 mandatory_rates |= BIT(i);
64 return mandatory_rates;
65}
66EXPORT_SYMBOL(ieee80211_mandatory_rates);
67
59eb21a6 68int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
8318d78a 69{
59eb21a6
BR		 70 /* see 802.11 17.3.8.3.2 and Annex J
71 * there are overlapping channel numbers in 5GHz and 2GHz bands */
3a0c52a6
VK		 72 if (chan <= 0)
73 return 0; /* not supported */
74 switch (band) {
75 case IEEE80211_BAND_2GHZ:
59eb21a6
BR		 76 if (chan == 14)
77 return 2484;
78 else if (chan < 14)
79 return 2407 + chan * 5;
3a0c52a6
VK		 80 break;
81 case IEEE80211_BAND_5GHZ:
82 if (chan >= 182 && chan <= 196)
83 return 4000 + chan * 5;
59eb21a6 84 else
3a0c52a6
VK		 85 return 5000 + chan * 5;
86 break;
87 case IEEE80211_BAND_60GHZ:
88 if (chan < 5)
89 return 56160 + chan * 2160;
90 break;
91 default:
92 ;
59eb21a6 93 }
3a0c52a6 94 return 0; /* not supported */
8318d78a
JB		 95}
96EXPORT_SYMBOL(ieee80211_channel_to_frequency);
97
98int ieee80211_frequency_to_channel(int freq)
99{
59eb21a6 100 /* see 802.11 17.3.8.3.2 and Annex J */
8318d78a
JB		 101 if (freq == 2484)
102 return 14;
59eb21a6 103 else if (freq < 2484)
8318d78a 104 return (freq - 2407) / 5;
59eb21a6
BR		 105 else if (freq >= 4910 && freq <= 4980)
106 return (freq - 4000) / 5;
3a0c52a6 107 else if (freq <= 45000) /* DMG band lower limit */
59eb21a6 108 return (freq - 5000) / 5;
3a0c52a6
VK		 109 else if (freq >= 58320 && freq <= 64800)
110 return (freq - 56160) / 2160;
111 else
112 return 0;
8318d78a
JB		 113}
114EXPORT_SYMBOL(ieee80211_frequency_to_channel);
115
6c507cd0
JB		 116struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
117 int freq)
906c730a
JB		 118{
119 enum ieee80211_band band;
120 struct ieee80211_supported_band *sband;
121 int i;
122
123 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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}
6c507cd0 137EXPORT_SYMBOL(__ieee80211_get_channel);
906c730a 138
8318d78a
JB		 139static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
140 enum ieee80211_band band)
141{
142 int i, want;
143
144 switch (band) {
145 case IEEE80211_BAND_5GHZ:
146 want = 3;
147 for (i = 0; i < sband->n_bitrates; i++) {
148 if (sband->bitrates[i].bitrate == 60 ||
149 sband->bitrates[i].bitrate == 120 ||
150 sband->bitrates[i].bitrate == 240) {
151 sband->bitrates[i].flags |=
152 IEEE80211_RATE_MANDATORY_A;
153 want--;
154 }
155 }
156 WARN_ON(want);
157 break;
158 case IEEE80211_BAND_2GHZ:
159 want = 7;
160 for (i = 0; i < sband->n_bitrates; i++) {
161 if (sband->bitrates[i].bitrate == 10) {
162 sband->bitrates[i].flags |=
163 IEEE80211_RATE_MANDATORY_B |
164 IEEE80211_RATE_MANDATORY_G;
165 want--;
166 }
167
168 if (sband->bitrates[i].bitrate == 20 ||
169 sband->bitrates[i].bitrate == 55 ||
170 sband->bitrates[i].bitrate == 110 ||
171 sband->bitrates[i].bitrate == 60 ||
172 sband->bitrates[i].bitrate == 120 ||
173 sband->bitrates[i].bitrate == 240) {
174 sband->bitrates[i].flags |=
175 IEEE80211_RATE_MANDATORY_G;
176 want--;
177 }
178
aac09fbf
JB		 179 if (sband->bitrates[i].bitrate != 10 &&
180 sband->bitrates[i].bitrate != 20 &&
181 sband->bitrates[i].bitrate != 55 &&
182 sband->bitrates[i].bitrate != 110)
8318d78a
JB		 183 sband->bitrates[i].flags |=
184 IEEE80211_RATE_ERP_G;
185 }
406f2388 186 WARN_ON(want != 0 && want != 3 && want != 6);
8318d78a 187 break;
3a0c52a6
VK		 188 case IEEE80211_BAND_60GHZ:
189 /* check for mandatory HT MCS 1..4 */
190 WARN_ON(!sband->ht_cap.ht_supported);
191 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
192 break;
8318d78a
JB		 193 case IEEE80211_NUM_BANDS:
194 WARN_ON(1);
195 break;
196 }
197}
198
199void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
200{
201 enum ieee80211_band band;
202
203 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
204 if (wiphy->bands[band])
205 set_mandatory_flags_band(wiphy->bands[band], band);
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
JB		 220{
221 if (key_idx > 5)
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;
252 break;
253 default:
254 break;
255 }
08645126 256
08645126
JB		 257 switch (params->cipher) {
258 case WLAN_CIPHER_SUITE_WEP40:
8fc0fee0 259 if (params->key_len != WLAN_KEY_LEN_WEP40)
08645126
JB		 260 return -EINVAL;
261 break;
262 case WLAN_CIPHER_SUITE_TKIP:
8fc0fee0 263 if (params->key_len != WLAN_KEY_LEN_TKIP)
08645126
JB		 264 return -EINVAL;
265 break;
266 case WLAN_CIPHER_SUITE_CCMP:
8fc0fee0 267 if (params->key_len != WLAN_KEY_LEN_CCMP)
08645126
JB		 268 return -EINVAL;
269 break;
cfcf1682
JM		 270 case WLAN_CIPHER_SUITE_CCMP_256:
271 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
272 return -EINVAL;
273 break;
274 case WLAN_CIPHER_SUITE_GCMP:
275 if (params->key_len != WLAN_KEY_LEN_GCMP)
276 return -EINVAL;
277 break;
278 case WLAN_CIPHER_SUITE_GCMP_256:
279 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
280 return -EINVAL;
281 break;
08645126 282 case WLAN_CIPHER_SUITE_WEP104:
8fc0fee0 283 if (params->key_len != WLAN_KEY_LEN_WEP104)
08645126
JB		 284 return -EINVAL;
285 break;
286 case WLAN_CIPHER_SUITE_AES_CMAC:
8fc0fee0 287 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
08645126
JB		 288 return -EINVAL;
289 break;
cfcf1682
JM		 290 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
291 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
292 return -EINVAL;
293 break;
294 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
295 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
296 return -EINVAL;
297 break;
298 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
299 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
300 return -EINVAL;
301 break;
08645126 302 default:
7d64b7cc
JB		 303 /*
304 * We don't know anything about this algorithm,
305 * allow using it -- but the driver must check
306 * all parameters! We still check below whether
307 * or not the driver supports this algorithm,
308 * of course.
309 */
310 break;
08645126
JB		 311 }
312
9f26a952
JM		 313 if (params->seq) {
314 switch (params->cipher) {
315 case WLAN_CIPHER_SUITE_WEP40:
316 case WLAN_CIPHER_SUITE_WEP104:
317 /* These ciphers do not use key sequence */
318 return -EINVAL;
319 case WLAN_CIPHER_SUITE_TKIP:
320 case WLAN_CIPHER_SUITE_CCMP:
cfcf1682
JM		 321 case WLAN_CIPHER_SUITE_CCMP_256:
322 case WLAN_CIPHER_SUITE_GCMP:
323 case WLAN_CIPHER_SUITE_GCMP_256:
9f26a952 324 case WLAN_CIPHER_SUITE_AES_CMAC:
cfcf1682
JM		 325 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
326 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
327 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
9f26a952
JM		 328 if (params->seq_len != 6)
329 return -EINVAL;
330 break;
331 }
332 }
333
38ba3c57 334 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
fffd0934
JB		 335 return -EINVAL;
336
08645126
JB		 337 return 0;
338}
e31a16d6 339
633adf1a 340unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
e31a16d6
ZY		 341{
342 unsigned int hdrlen = 24;
343
344 if (ieee80211_is_data(fc)) {
345 if (ieee80211_has_a4(fc))
346 hdrlen = 30;
d0dd2de0 347 if (ieee80211_is_data_qos(fc)) {
e31a16d6 348 hdrlen += IEEE80211_QOS_CTL_LEN;
d0dd2de0
AT		 349 if (ieee80211_has_order(fc))
350 hdrlen += IEEE80211_HT_CTL_LEN;
351 }
e31a16d6
ZY		 352 goto out;
353 }
354
fb142f4b
FC		 355 if (ieee80211_is_mgmt(fc)) {
356 if (ieee80211_has_order(fc))
357 hdrlen += IEEE80211_HT_CTL_LEN;
358 goto out;
359 }
360
e31a16d6
ZY		 361 if (ieee80211_is_ctl(fc)) {
362 /*
363 * ACK and CTS are 10 bytes, all others 16. To see how
364 * to get this condition consider
365 * subtype mask: 0b0000000011110000 (0x00F0)
366 * ACK subtype: 0b0000000011010000 (0x00D0)
367 * CTS subtype: 0b0000000011000000 (0x00C0)
368 * bits that matter: ^^^ (0x00E0)
369 * value of those: 0b0000000011000000 (0x00C0)
370 */
371 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
372 hdrlen = 10;
373 else
374 hdrlen = 16;
375 }
376out:
377 return hdrlen;
378}
379EXPORT_SYMBOL(ieee80211_hdrlen);
380
381unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
382{
383 const struct ieee80211_hdr *hdr =
384 (const struct ieee80211_hdr *)skb->data;
385 unsigned int hdrlen;
386
387 if (unlikely(skb->len < 10))
388 return 0;
389 hdrlen = ieee80211_hdrlen(hdr->frame_control);
390 if (unlikely(hdrlen > skb->len))
391 return 0;
392 return hdrlen;
393}
394EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
395
2d1c304c 396static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
e31a16d6 397{
2d1c304c 398 int ae = flags & MESH_FLAGS_AE;
7dd111e8 399 /* 802.11-2012, 8.2.4.7.3 */
e31a16d6 400 switch (ae) {
7dd111e8 401 default:
e31a16d6
ZY		 402 case 0:
403 return 6;
3c5772a5 404 case MESH_FLAGS_AE_A4:
e31a16d6 405 return 12;
3c5772a5 406 case MESH_FLAGS_AE_A5_A6:
e31a16d6 407 return 18;
e31a16d6
ZY		 408 }
409}
2d1c304c
FF		 410
411unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
412{
413 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
414}
9b395bc3 415EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
e31a16d6 416
2d1c304c
FF		 417static int __ieee80211_data_to_8023(struct sk_buff *skb, struct ethhdr *ehdr,
418 const u8 *addr, enum nl80211_iftype iftype)
e31a16d6
ZY		 419{
420 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2d1c304c
FF		 421 struct {
422 u8 hdr[ETH_ALEN] __aligned(2);
423 __be16 proto;
424 } payload;
425 struct ethhdr tmp;
426 u16 hdrlen;
427 u8 mesh_flags = 0;
e31a16d6
ZY		 428
429 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
430 return -1;
431
432 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2d1c304c
FF		 433 if (skb->len < hdrlen + 8)
434 return -1;
e31a16d6
ZY		 435
436 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
437 * header
438 * IEEE 802.11 address fields:
439 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
440 * 0 0 DA SA BSSID n/a
441 * 0 1 DA BSSID SA n/a
442 * 1 0 BSSID SA DA n/a
443 * 1 1 RA TA DA SA
444 */
2d1c304c
FF		 445 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
446 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
447
448 if (iftype == NL80211_IFTYPE_MESH_POINT)
449 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
e31a16d6
ZY		 450
451 switch (hdr->frame_control &
452 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
453 case cpu_to_le16(IEEE80211_FCTL_TODS):
454 if (unlikely(iftype != NL80211_IFTYPE_AP &&
074ac8df
JB		 455 iftype != NL80211_IFTYPE_AP_VLAN &&
456 iftype != NL80211_IFTYPE_P2P_GO))
e31a16d6
ZY		 457 return -1;
458 break;
459 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
460 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
f14543ee
FF		 461 iftype != NL80211_IFTYPE_MESH_POINT &&
462 iftype != NL80211_IFTYPE_AP_VLAN &&
463 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 464 return -1;
465 if (iftype == NL80211_IFTYPE_MESH_POINT) {
2d1c304c 466 if (mesh_flags & MESH_FLAGS_AE_A4)
e3cf8b3f 467 return -1;
2d1c304c 468 if (mesh_flags & MESH_FLAGS_AE_A5_A6) {
e3cf8b3f
ZY		 469 skb_copy_bits(skb, hdrlen +
470 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c 471 tmp.h_dest, 2 * ETH_ALEN);
e31a16d6 472 }
2d1c304c 473 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
e31a16d6
ZY		 474 }
475 break;
476 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5 477 if ((iftype != NL80211_IFTYPE_STATION &&
074ac8df
JB		 478 iftype != NL80211_IFTYPE_P2P_CLIENT &&
479 iftype != NL80211_IFTYPE_MESH_POINT) ||
2d1c304c
FF		 480 (is_multicast_ether_addr(tmp.h_dest) &&
481 ether_addr_equal(tmp.h_source, addr)))
e31a16d6 482 return -1;
3c5772a5 483 if (iftype == NL80211_IFTYPE_MESH_POINT) {
2d1c304c 484 if (mesh_flags & MESH_FLAGS_AE_A5_A6)
7dd111e8 485 return -1;
2d1c304c 486 if (mesh_flags & MESH_FLAGS_AE_A4)
e3cf8b3f
ZY		 487 skb_copy_bits(skb, hdrlen +
488 offsetof(struct ieee80211s_hdr, eaddr1),
2d1c304c
FF		 489 tmp.h_source, ETH_ALEN);
490 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
3c5772a5 491 }
e31a16d6
ZY		 492 break;
493 case cpu_to_le16(0):
941c93cd 494 if (iftype != NL80211_IFTYPE_ADHOC &&
6e0bd6c3
RL		 495 iftype != NL80211_IFTYPE_STATION &&
496 iftype != NL80211_IFTYPE_OCB)
941c93cd 497 return -1;
e31a16d6
ZY		 498 break;
499 }
500
2d1c304c
FF		 501 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
502 tmp.h_proto = payload.proto;
e31a16d6 503
2d1c304c
FF		 504 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
505 tmp.h_proto != htons(ETH_P_AARP) &&
506 tmp.h_proto != htons(ETH_P_IPX)) ||
507 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
e31a16d6
ZY		 508 /* remove RFC1042 or Bridge-Tunnel encapsulation and
509 * replace EtherType */
2d1c304c
FF		 510 hdrlen += ETH_ALEN + 2;
511 else
512 tmp.h_proto = htons(skb->len);
513
514 pskb_pull(skb, hdrlen);
e31a16d6 515
2d1c304c 516 if (!ehdr)
e31a16d6 517 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
2d1c304c
FF		 518 memcpy(ehdr, &tmp, sizeof(tmp));
519
e31a16d6
ZY		 520 return 0;
521}
2d1c304c
FF		 522
523int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
524 enum nl80211_iftype iftype)
525{
526 return __ieee80211_data_to_8023(skb, NULL, addr, iftype);
527}
e31a16d6
ZY		 528EXPORT_SYMBOL(ieee80211_data_to_8023);
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;
24616152 621
e31a16d6
ZY		 622 skb->truesize += head_need;
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. */
639 skb_set_mac_header(skb, 0);
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
230fd28a
FF		 647static struct sk_buff *
648__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
649 int offset, int len)
650{
651 struct sk_buff *frame;
652
653 if (skb->len - offset < len)
654 return NULL;
655
656 /*
657 * Allocate and reserve two bytes more for payload
658 * alignment since sizeof(struct ethhdr) is 14.
659 */
660 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + len);
661
662 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
663 skb_copy_bits(skb, offset, skb_put(frame, len), len);
664
665 return frame;
666}
eaf85ca7
ZY		 667
668void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
669 const u8 *addr, enum nl80211_iftype iftype,
8b3becad
YAP		 670 const unsigned int extra_headroom,
671 bool has_80211_header)
eaf85ca7 672{
230fd28a 673 unsigned int hlen = ALIGN(extra_headroom, 4);
eaf85ca7
ZY		 674 struct sk_buff *frame = NULL;
675 u16 ethertype;
676 u8 *payload;
230fd28a
FF		 677 int offset = 0, remaining, err;
678 struct ethhdr eth;
2bf0ccc7 679 bool reuse_skb = false;
230fd28a 680 bool last = false;
88665f5a 681
8b3becad 682 if (has_80211_header) {
230fd28a 683 err = __ieee80211_data_to_8023(skb, &eth, addr, iftype);
8b3becad
YAP		 684 if (err)
685 goto out;
8b3becad 686 }
eaf85ca7 687
230fd28a
FF		 688 while (!last) {
689 unsigned int subframe_len;
690 int len;
eaf85ca7 691 u8 padding;
eaf85ca7 692
230fd28a
FF		 693 skb_copy_bits(skb, offset, &eth, sizeof(eth));
694 len = ntohs(eth.h_proto);
695 subframe_len = sizeof(struct ethhdr) + len;
eaf85ca7 696 padding = (4 - subframe_len) & 0x3;
230fd28a 697
eaf85ca7 698 /* the last MSDU has no padding */
230fd28a 699 remaining = skb->len - offset;
eaf85ca7
ZY		 700 if (subframe_len > remaining)
701 goto purge;
702
230fd28a 703 offset += sizeof(struct ethhdr);
eaf85ca7 704 /* reuse skb for the last subframe */
230fd28a
FF		 705 last = remaining <= subframe_len + padding;
706 if (!skb_is_nonlinear(skb) && last) {
707 skb_pull(skb, offset);
eaf85ca7 708 frame = skb;
230fd28a
FF		 709 reuse_skb = true;
710 } else {
711 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len);
eaf85ca7
ZY		 712 if (!frame)
713 goto purge;
714
230fd28a 715 offset += len + padding;
eaf85ca7
ZY		 716 }
717
718 skb_reset_network_header(frame);
719 frame->dev = skb->dev;
720 frame->priority = skb->priority;
721
722 payload = frame->data;
723 ethertype = (payload[6] << 8) | payload[7];
ac422d3c 724 if (likely((ether_addr_equal(payload, rfc1042_header) &&
eaf85ca7 725 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
ac422d3c 726 ether_addr_equal(payload, bridge_tunnel_header))) {
230fd28a
FF		 727 eth.h_proto = htons(ethertype);
728 skb_pull(frame, ETH_ALEN + 2);
eaf85ca7 729 }
230fd28a
FF		 730
731 memcpy(skb_push(frame, sizeof(eth)), &eth, sizeof(eth));
eaf85ca7
ZY		 732 __skb_queue_tail(list, frame);
733 }
734
230fd28a
FF		 735 if (!reuse_skb)
736 dev_kfree_skb(skb);
737
eaf85ca7
ZY		 738 return;
739
740 purge:
741 __skb_queue_purge(list);
742 out:
743 dev_kfree_skb(skb);
744}
745EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
746
e31a16d6 747/* Given a data frame determine the 802.1p/1d tag to use. */
fa9ffc74
KP		 748unsigned int cfg80211_classify8021d(struct sk_buff *skb,
749 struct cfg80211_qos_map *qos_map)
e31a16d6
ZY		 750{
751 unsigned int dscp;
c6ca5e28 752 unsigned char vlan_priority;
e31a16d6
ZY		 753
754 /* skb->priority values from 256->263 are magic values to
755 * directly indicate a specific 802.1d priority. This is used
756 * to allow 802.1d priority to be passed directly in from VLAN
757 * tags, etc.
758 */
759 if (skb->priority >= 256 && skb->priority <= 263)
760 return skb->priority - 256;
761
df8a39de
JP		 762 if (skb_vlan_tag_present(skb)) {
763 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
c6ca5e28
V		 764 >> VLAN_PRIO_SHIFT;
765 if (vlan_priority > 0)
766 return vlan_priority;
767 }
768
e31a16d6
ZY		 769 switch (skb->protocol) {
770 case htons(ETH_P_IP):
b156579b
DT		 771 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
772 break;
773 case htons(ETH_P_IPV6):
774 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
e31a16d6 775 break;
960d97f9
SW		 776 case htons(ETH_P_MPLS_UC):
777 case htons(ETH_P_MPLS_MC): {
778 struct mpls_label mpls_tmp, *mpls;
779
780 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
781 sizeof(*mpls), &mpls_tmp);
782 if (!mpls)
783 return 0;
784
785 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
786 >> MPLS_LS_TC_SHIFT;
787 }
788 case htons(ETH_P_80221):
789 /* 802.21 is always network control traffic */
790 return 7;
e31a16d6
ZY		 791 default:
792 return 0;
793 }
794
fa9ffc74
KP		 795 if (qos_map) {
796 unsigned int i, tmp_dscp = dscp >> 2;
797
798 for (i = 0; i < qos_map->num_des; i++) {
799 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
800 return qos_map->dscp_exception[i].up;
801 }
802
803 for (i = 0; i < 8; i++) {
804 if (tmp_dscp >= qos_map->up[i].low &&
805 tmp_dscp <= qos_map->up[i].high)
806 return i;
807 }
808 }
809
e31a16d6
ZY		 810 return dscp >> 5;
811}
812EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6
JB		 813
814const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
815{
9caf0364
JB		 816 const struct cfg80211_bss_ies *ies;
817
818 ies = rcu_dereference(bss->ies);
819 if (!ies)
517357c6 820 return NULL;
9caf0364
JB		 821
822 return cfg80211_find_ie(ie, ies->data, ies->len);
517357c6
JB		 823}
824EXPORT_SYMBOL(ieee80211_bss_get_ie);
fffd0934
JB		 825
826void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
827{
f26cbf40 828 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
fffd0934
JB		 829 struct net_device *dev = wdev->netdev;
830 int i;
831
832 if (!wdev->connect_keys)
833 return;
834
835 for (i = 0; i < 6; i++) {
836 if (!wdev->connect_keys->params[i].cipher)
837 continue;
e35e4d28
HG		 838 if (rdev_add_key(rdev, dev, i, false, NULL,
839 &wdev->connect_keys->params[i])) {
e9c0268f 840 netdev_err(dev, "failed to set key %d\n", i);
1e056665
ZY		 841 continue;
842 }
fffd0934 843 if (wdev->connect_keys->def == i)
e35e4d28 844 if (rdev_set_default_key(rdev, dev, i, true, true)) {
e9c0268f 845 netdev_err(dev, "failed to set defkey %d\n", i);
1e056665
ZY		 846 continue;
847 }
fffd0934 848 if (wdev->connect_keys->defmgmt == i)
e35e4d28 849 if (rdev_set_default_mgmt_key(rdev, dev, i))
e9c0268f 850 netdev_err(dev, "failed to set mgtdef %d\n", i);
fffd0934
JB		 851 }
852
b47f610b 853 kzfree(wdev->connect_keys);
fffd0934
JB		 854 wdev->connect_keys = NULL;
855}
3d54d255 856
1f6fc43e 857void cfg80211_process_wdev_events(struct wireless_dev *wdev)
3d54d255
JB		 858{
859 struct cfg80211_event *ev;
860 unsigned long flags;
861 const u8 *bssid = NULL;
862
863 spin_lock_irqsave(&wdev->event_lock, flags);
864 while (!list_empty(&wdev->event_list)) {
865 ev = list_first_entry(&wdev->event_list,
866 struct cfg80211_event, list);
867 list_del(&ev->list);
868 spin_unlock_irqrestore(&wdev->event_lock, flags);
869
870 wdev_lock(wdev);
871 switch (ev->type) {
872 case EVENT_CONNECT_RESULT:
873 if (!is_zero_ether_addr(ev->cr.bssid))
874 bssid = ev->cr.bssid;
875 __cfg80211_connect_result(
876 wdev->netdev, bssid,
877 ev->cr.req_ie, ev->cr.req_ie_len,
878 ev->cr.resp_ie, ev->cr.resp_ie_len,
879 ev->cr.status,
880 ev->cr.status == WLAN_STATUS_SUCCESS,
881 NULL);
882 break;
883 case EVENT_ROAMED:
adbde344
VT		 884 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
885 ev->rm.req_ie_len, ev->rm.resp_ie,
886 ev->rm.resp_ie_len);
3d54d255
JB		 887 break;
888 case EVENT_DISCONNECTED:
889 __cfg80211_disconnected(wdev->netdev,
890 ev->dc.ie, ev->dc.ie_len,
80279fb7
JB		 891 ev->dc.reason,
892 !ev->dc.locally_generated);
3d54d255
JB		 893 break;
894 case EVENT_IBSS_JOINED:
fe94f3a4
AQ		 895 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
896 ev->ij.channel);
3d54d255 897 break;
f04c2203
MK		 898 case EVENT_STOPPED:
899 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
900 break;
3d54d255
JB		 901 }
902 wdev_unlock(wdev);
903
904 kfree(ev);
905
906 spin_lock_irqsave(&wdev->event_lock, flags);
907 }
908 spin_unlock_irqrestore(&wdev->event_lock, flags);
909}
910
911void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
912{
913 struct wireless_dev *wdev;
914
915 ASSERT_RTNL();
3d54d255 916
89a54e48 917 list_for_each_entry(wdev, &rdev->wdev_list, list)
3d54d255 918 cfg80211_process_wdev_events(wdev);
3d54d255
JB		 919}
920
921int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
922 struct net_device *dev, enum nl80211_iftype ntype,
923 u32 *flags, struct vif_params *params)
924{
925 int err;
926 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
927
73fb08e2 928 ASSERT_RTNL();
3d54d255
JB		 929
930 /* don't support changing VLANs, you just re-create them */
931 if (otype == NL80211_IFTYPE_AP_VLAN)
932 return -EOPNOTSUPP;
933
98104fde
JB		 934 /* cannot change into P2P device type */
935 if (ntype == NL80211_IFTYPE_P2P_DEVICE)
936 return -EOPNOTSUPP;
937
3d54d255
JB		 938 if (!rdev->ops->change_virtual_intf ||
939 !(rdev->wiphy.interface_modes & (1 << ntype)))
940 return -EOPNOTSUPP;
941
ad4bb6f8 942 /* if it's part of a bridge, reject changing type to station/ibss */
f350a0a8 943 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
074ac8df
JB		 944 (ntype == NL80211_IFTYPE_ADHOC ||
945 ntype == NL80211_IFTYPE_STATION ||
946 ntype == NL80211_IFTYPE_P2P_CLIENT))
ad4bb6f8
JB		 947 return -EBUSY;
948
6cbfb1bb 949 if (ntype != otype) {
9bc383de 950 dev->ieee80211_ptr->use_4addr = false;
29cbe68c 951 dev->ieee80211_ptr->mesh_id_up_len = 0;
194ff52d 952 wdev_lock(dev->ieee80211_ptr);
fa9ffc74 953 rdev_set_qos_map(rdev, dev, NULL);
194ff52d 954 wdev_unlock(dev->ieee80211_ptr);
9bc383de 955
3d54d255 956 switch (otype) {
ac800140 957 case NL80211_IFTYPE_AP:
7c8d5e03 958 cfg80211_stop_ap(rdev, dev, true);
ac800140 959 break;
3d54d255
JB		 960 case NL80211_IFTYPE_ADHOC:
961 cfg80211_leave_ibss(rdev, dev, false);
962 break;
963 case NL80211_IFTYPE_STATION:
074ac8df 964 case NL80211_IFTYPE_P2P_CLIENT:
83739b03 965 wdev_lock(dev->ieee80211_ptr);
3d54d255
JB		 966 cfg80211_disconnect(rdev, dev,
967 WLAN_REASON_DEAUTH_LEAVING, true);
83739b03 968 wdev_unlock(dev->ieee80211_ptr);
3d54d255
JB		 969 break;
970 case NL80211_IFTYPE_MESH_POINT:
971 /* mesh should be handled? */
972 break;
973 default:
974 break;
975 }
976
977 cfg80211_process_rdev_events(rdev);
978 }
979
e35e4d28 980 err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params);
3d54d255
JB		 981
982 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
983
9bc383de
JB		 984 if (!err && params && params->use_4addr != -1)
985 dev->ieee80211_ptr->use_4addr = params->use_4addr;
986
ad4bb6f8
JB		 987 if (!err) {
988 dev->priv_flags &= ~IFF_DONT_BRIDGE;
989 switch (ntype) {
990 case NL80211_IFTYPE_STATION:
991 if (dev->ieee80211_ptr->use_4addr)
992 break;
993 /* fall through */
6e0bd6c3 994 case NL80211_IFTYPE_OCB:
074ac8df 995 case NL80211_IFTYPE_P2P_CLIENT:
ad4bb6f8
JB		 996 case NL80211_IFTYPE_ADHOC:
997 dev->priv_flags |= IFF_DONT_BRIDGE;
998 break;
074ac8df 999 case NL80211_IFTYPE_P2P_GO:
ad4bb6f8
JB		 1000 case NL80211_IFTYPE_AP:
1001 case NL80211_IFTYPE_AP_VLAN:
1002 case NL80211_IFTYPE_WDS:
1003 case NL80211_IFTYPE_MESH_POINT:
1004 /* bridging OK */
1005 break;
1006 case NL80211_IFTYPE_MONITOR:
1007 /* monitor can't bridge anyway */
1008 break;
1009 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1010 case NUM_NL80211_IFTYPES:
ad4bb6f8
JB		 1011 /* not happening */
1012 break;
98104fde
JB		 1013 case NL80211_IFTYPE_P2P_DEVICE:
1014 WARN_ON(1);
1015 break;
ad4bb6f8
JB		 1016 }
1017 }
1018
dbbae26a
MK		 1019 if (!err && ntype != otype && netif_running(dev)) {
1020 cfg80211_update_iface_num(rdev, ntype, 1);
1021 cfg80211_update_iface_num(rdev, otype, -1);
1022 }
1023
3d54d255
JB		 1024 return err;
1025}
254416aa 1026
95ddc1fc
VK		 1027static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1028{
1029 static const u32 __mcs2bitrate[] = {
1030 /* control PHY */
1031 [0] = 275,
1032 /* SC PHY */
1033 [1] = 3850,
1034 [2] = 7700,
1035 [3] = 9625,
1036 [4] = 11550,
1037 [5] = 12512, /* 1251.25 mbps */
1038 [6] = 15400,
1039 [7] = 19250,
1040 [8] = 23100,
1041 [9] = 25025,
1042 [10] = 30800,
1043 [11] = 38500,
1044 [12] = 46200,
1045 /* OFDM PHY */
1046 [13] = 6930,
1047 [14] = 8662, /* 866.25 mbps */
1048 [15] = 13860,
1049 [16] = 17325,
1050 [17] = 20790,
1051 [18] = 27720,
1052 [19] = 34650,
1053 [20] = 41580,
1054 [21] = 45045,
1055 [22] = 51975,
1056 [23] = 62370,
1057 [24] = 67568, /* 6756.75 mbps */
1058 /* LP-SC PHY */
1059 [25] = 6260,
1060 [26] = 8340,
1061 [27] = 11120,
1062 [28] = 12510,
1063 [29] = 16680,
1064 [30] = 22240,
1065 [31] = 25030,
1066 };
1067
1068 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1069 return 0;
1070
1071 return __mcs2bitrate[rate->mcs];
1072}
1073
db9c64cf
JB		 1074static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1075{
1076 static const u32 base[4][10] = {
1077 { 6500000,
1078 13000000,
1079 19500000,
1080 26000000,
1081 39000000,
1082 52000000,
1083 58500000,
1084 65000000,
1085 78000000,
1086 0,
1087 },
1088 { 13500000,
1089 27000000,
1090 40500000,
1091 54000000,
1092 81000000,
1093 108000000,
1094 121500000,
1095 135000000,
1096 162000000,
1097 180000000,
1098 },
1099 { 29300000,
1100 58500000,
1101 87800000,
1102 117000000,
1103 175500000,
1104 234000000,
1105 263300000,
1106 292500000,
1107 351000000,
1108 390000000,
1109 },
1110 { 58500000,
1111 117000000,
1112 175500000,
1113 234000000,
1114 351000000,
1115 468000000,
1116 526500000,
1117 585000000,
1118 702000000,
1119 780000000,
1120 },
1121 };
1122 u32 bitrate;
1123 int idx;
1124
1125 if (WARN_ON_ONCE(rate->mcs > 9))
1126 return 0;
1127
b51f3bee
JB		 1128 switch (rate->bw) {
1129 case RATE_INFO_BW_160:
1130 idx = 3;
1131 break;
1132 case RATE_INFO_BW_80:
1133 idx = 2;
1134 break;
1135 case RATE_INFO_BW_40:
1136 idx = 1;
1137 break;
1138 case RATE_INFO_BW_5:
1139 case RATE_INFO_BW_10:
1140 default:
1141 WARN_ON(1);
1142 /* fall through */
1143 case RATE_INFO_BW_20:
1144 idx = 0;
1145 }
db9c64cf
JB		 1146
1147 bitrate = base[idx][rate->mcs];
1148 bitrate *= rate->nss;
1149
1150 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1151 bitrate = (bitrate / 9) * 10;
1152
1153 /* do NOT round down here */
1154 return (bitrate + 50000) / 100000;
1155}
1156
8eb41c8d 1157u32 cfg80211_calculate_bitrate(struct rate_info *rate)
254416aa
JL		 1158{
1159 int modulation, streams, bitrate;
1160
db9c64cf
JB		 1161 if (!(rate->flags & RATE_INFO_FLAGS_MCS) &&
1162 !(rate->flags & RATE_INFO_FLAGS_VHT_MCS))
254416aa 1163 return rate->legacy;
95ddc1fc
VK		 1164 if (rate->flags & RATE_INFO_FLAGS_60G)
1165 return cfg80211_calculate_bitrate_60g(rate);
db9c64cf
JB		 1166 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1167 return cfg80211_calculate_bitrate_vht(rate);
254416aa
JL		 1168
1169 /* the formula below does only work for MCS values smaller than 32 */
2615f375 1170 if (WARN_ON_ONCE(rate->mcs >= 32))
254416aa
JL		 1171 return 0;
1172
1173 modulation = rate->mcs & 7;
1174 streams = (rate->mcs >> 3) + 1;
1175
b51f3bee 1176 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
254416aa
JL		 1177
1178 if (modulation < 4)
1179 bitrate *= (modulation + 1);
1180 else if (modulation == 4)
1181 bitrate *= (modulation + 2);
1182 else
1183 bitrate *= (modulation + 3);
1184
1185 bitrate *= streams;
1186
1187 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1188 bitrate = (bitrate / 9) * 10;
1189
1190 /* do NOT round down here */
1191 return (bitrate + 50000) / 100000;
1192}
8097e149 1193EXPORT_SYMBOL(cfg80211_calculate_bitrate);
56d1893d 1194
c216e641
AS		 1195int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1196 enum ieee80211_p2p_attr_id attr,
1197 u8 *buf, unsigned int bufsize)
0ee45355
JB		 1198{
1199 u8 *out = buf;
1200 u16 attr_remaining = 0;
1201 bool desired_attr = false;
1202 u16 desired_len = 0;
1203
1204 while (len > 0) {
1205 unsigned int iedatalen;
1206 unsigned int copy;
1207 const u8 *iedata;
1208
1209 if (len < 2)
1210 return -EILSEQ;
1211 iedatalen = ies[1];
1212 if (iedatalen + 2 > len)
1213 return -EILSEQ;
1214
1215 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1216 goto cont;
1217
1218 if (iedatalen < 4)
1219 goto cont;
1220
1221 iedata = ies + 2;
1222
1223 /* check WFA OUI, P2P subtype */
1224 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1225 iedata[2] != 0x9a || iedata[3] != 0x09)
1226 goto cont;
1227
1228 iedatalen -= 4;
1229 iedata += 4;
1230
1231 /* check attribute continuation into this IE */
1232 copy = min_t(unsigned int, attr_remaining, iedatalen);
1233 if (copy && desired_attr) {
1234 desired_len += copy;
1235 if (out) {
1236 memcpy(out, iedata, min(bufsize, copy));
1237 out += min(bufsize, copy);
1238 bufsize -= min(bufsize, copy);
1239 }
1240
1241
1242 if (copy == attr_remaining)
1243 return desired_len;
1244 }
1245
1246 attr_remaining -= copy;
1247 if (attr_remaining)
1248 goto cont;
1249
1250 iedatalen -= copy;
1251 iedata += copy;
1252
1253 while (iedatalen > 0) {
1254 u16 attr_len;
1255
1256 /* P2P attribute ID & size must fit */
1257 if (iedatalen < 3)
1258 return -EILSEQ;
1259 desired_attr = iedata[0] == attr;
1260 attr_len = get_unaligned_le16(iedata + 1);
1261 iedatalen -= 3;
1262 iedata += 3;
1263
1264 copy = min_t(unsigned int, attr_len, iedatalen);
1265
1266 if (desired_attr) {
1267 desired_len += copy;
1268 if (out) {
1269 memcpy(out, iedata, min(bufsize, copy));
1270 out += min(bufsize, copy);
1271 bufsize -= min(bufsize, copy);
1272 }
1273
1274 if (copy == attr_len)
1275 return desired_len;
1276 }
1277
1278 iedata += copy;
1279 iedatalen -= copy;
1280 attr_remaining = attr_len - copy;
1281 }
1282
1283 cont:
1284 len -= ies[1] + 2;
1285 ies += ies[1] + 2;
1286 }
1287
1288 if (attr_remaining && desired_attr)
1289 return -EILSEQ;
1290
1291 return -ENOENT;
1292}
1293EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1294
29464ccc
JB		 1295static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1296{
1297 int i;
1298
1299 for (i = 0; i < n_ids; i++)
1300 if (ids[i] == id)
1301 return true;
1302 return false;
1303}
1304
1305size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1306 const u8 *ids, int n_ids,
1307 const u8 *after_ric, int n_after_ric,
1308 size_t offset)
1309{
1310 size_t pos = offset;
1311
1312 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
1313 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
1314 pos += 2 + ies[pos + 1];
1315
1316 while (pos < ielen &&
1317 !ieee80211_id_in_list(after_ric, n_after_ric,
1318 ies[pos]))
1319 pos += 2 + ies[pos + 1];
1320 } else {
1321 pos += 2 + ies[pos + 1];
1322 }
1323 }
1324
1325 return pos;
1326}
1327EXPORT_SYMBOL(ieee80211_ie_split_ric);
1328
1ce3e82b
JB		 1329bool ieee80211_operating_class_to_band(u8 operating_class,
1330 enum ieee80211_band *band)
1331{
1332 switch (operating_class) {
1333 case 112:
1334 case 115 ... 127:
954a86ef 1335 case 128 ... 130:
1ce3e82b
JB		 1336 *band = IEEE80211_BAND_5GHZ;
1337 return true;
1338 case 81:
1339 case 82:
1340 case 83:
1341 case 84:
1342 *band = IEEE80211_BAND_2GHZ;
1343 return true;
55300a13
VK		 1344 case 180:
1345 *band = IEEE80211_BAND_60GHZ;
1346 return true;
1ce3e82b
JB		 1347 }
1348
1349 return false;
1350}
1351EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1352
a38700dd
AN		 1353bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1354 u8 *op_class)
1355{
1356 u8 vht_opclass;
1357 u16 freq = chandef->center_freq1;
1358
1359 if (freq >= 2412 && freq <= 2472) {
1360 if (chandef->width > NL80211_CHAN_WIDTH_40)
1361 return false;
1362
1363 /* 2.407 GHz, channels 1..13 */
1364 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1365 if (freq > chandef->chan->center_freq)
1366 *op_class = 83; /* HT40+ */
1367 else
1368 *op_class = 84; /* HT40- */
1369 } else {
1370 *op_class = 81;
1371 }
1372
1373 return true;
1374 }
1375
1376 if (freq == 2484) {
1377 if (chandef->width > NL80211_CHAN_WIDTH_40)
1378 return false;
1379
1380 *op_class = 82; /* channel 14 */
1381 return true;
1382 }
1383
1384 switch (chandef->width) {
1385 case NL80211_CHAN_WIDTH_80:
1386 vht_opclass = 128;
1387 break;
1388 case NL80211_CHAN_WIDTH_160:
1389 vht_opclass = 129;
1390 break;
1391 case NL80211_CHAN_WIDTH_80P80:
1392 vht_opclass = 130;
1393 break;
1394 case NL80211_CHAN_WIDTH_10:
1395 case NL80211_CHAN_WIDTH_5:
1396 return false; /* unsupported for now */
1397 default:
1398 vht_opclass = 0;
1399 break;
1400 }
1401
1402 /* 5 GHz, channels 36..48 */
1403 if (freq >= 5180 && freq <= 5240) {
1404 if (vht_opclass) {
1405 *op_class = vht_opclass;
1406 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1407 if (freq > chandef->chan->center_freq)
1408 *op_class = 116;
1409 else
1410 *op_class = 117;
1411 } else {
1412 *op_class = 115;
1413 }
1414
1415 return true;
1416 }
1417
1418 /* 5 GHz, channels 52..64 */
1419 if (freq >= 5260 && freq <= 5320) {
1420 if (vht_opclass) {
1421 *op_class = vht_opclass;
1422 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1423 if (freq > chandef->chan->center_freq)
1424 *op_class = 119;
1425 else
1426 *op_class = 120;
1427 } else {
1428 *op_class = 118;
1429 }
1430
1431 return true;
1432 }
1433
1434 /* 5 GHz, channels 100..144 */
1435 if (freq >= 5500 && freq <= 5720) {
1436 if (vht_opclass) {
1437 *op_class = vht_opclass;
1438 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1439 if (freq > chandef->chan->center_freq)
1440 *op_class = 122;
1441 else
1442 *op_class = 123;
1443 } else {
1444 *op_class = 121;
1445 }
1446
1447 return true;
1448 }
1449
1450 /* 5 GHz, channels 149..169 */
1451 if (freq >= 5745 && freq <= 5845) {
1452 if (vht_opclass) {
1453 *op_class = vht_opclass;
1454 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1455 if (freq > chandef->chan->center_freq)
1456 *op_class = 126;
1457 else
1458 *op_class = 127;
1459 } else if (freq <= 5805) {
1460 *op_class = 124;
1461 } else {
1462 *op_class = 125;
1463 }
1464
1465 return true;
1466 }
1467
1468 /* 56.16 GHz, channel 1..4 */
1469 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
1470 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1471 return false;
1472
1473 *op_class = 180;
1474 return true;
1475 }
1476
1477 /* not supported yet */
1478 return false;
1479}
1480EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1481
56d1893d
JB		 1482int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1483 u32 beacon_int)
1484{
1485 struct wireless_dev *wdev;
1486 int res = 0;
1487
1488 if (!beacon_int)
1489 return -EINVAL;
1490
89a54e48 1491 list_for_each_entry(wdev, &rdev->wdev_list, list) {
56d1893d
JB		 1492 if (!wdev->beacon_interval)
1493 continue;
1494 if (wdev->beacon_interval != beacon_int) {
1495 res = -EINVAL;
1496 break;
1497 }
1498 }
1499
56d1893d
JB		 1500 return res;
1501}
7527a782 1502
65a124dd
MK		 1503int cfg80211_iter_combinations(struct wiphy *wiphy,
1504 const int num_different_channels,
1505 const u8 radar_detect,
1506 const int iftype_num[NUM_NL80211_IFTYPES],
1507 void (*iter)(const struct ieee80211_iface_combination *c,
1508 void *data),
1509 void *data)
cb2d956d 1510{
8c48b50a
FF		 1511 const struct ieee80211_regdomain *regdom;
1512 enum nl80211_dfs_regions region = 0;
cb2d956d
LC		 1513 int i, j, iftype;
1514 int num_interfaces = 0;
1515 u32 used_iftypes = 0;
1516
8c48b50a
FF		 1517 if (radar_detect) {
1518 rcu_read_lock();
1519 regdom = rcu_dereference(cfg80211_regdomain);
1520 if (regdom)
1521 region = regdom->dfs_region;
1522 rcu_read_unlock();
1523 }
1524
cb2d956d
LC		 1525 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1526 num_interfaces += iftype_num[iftype];
1527 if (iftype_num[iftype] > 0 &&
1528 !(wiphy->software_iftypes & BIT(iftype)))
1529 used_iftypes |= BIT(iftype);
1530 }
1531
1532 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1533 const struct ieee80211_iface_combination *c;
1534 struct ieee80211_iface_limit *limits;
1535 u32 all_iftypes = 0;
1536
1537 c = &wiphy->iface_combinations[i];
1538
1539 if (num_interfaces > c->max_interfaces)
1540 continue;
1541 if (num_different_channels > c->num_different_channels)
1542 continue;
1543
1544 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1545 GFP_KERNEL);
1546 if (!limits)
1547 return -ENOMEM;
1548
1549 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1550 if (wiphy->software_iftypes & BIT(iftype))
1551 continue;
1552 for (j = 0; j < c->n_limits; j++) {
1553 all_iftypes |= limits[j].types;
1554 if (!(limits[j].types & BIT(iftype)))
1555 continue;
1556 if (limits[j].max < iftype_num[iftype])
1557 goto cont;
1558 limits[j].max -= iftype_num[iftype];
1559 }
1560 }
1561
65d26f29 1562 if (radar_detect != (c->radar_detect_widths & radar_detect))
cb2d956d
LC		 1563 goto cont;
1564
8c48b50a
FF		 1565 if (radar_detect && c->radar_detect_regions &&
1566 !(c->radar_detect_regions & BIT(region)))
1567 goto cont;
1568
cb2d956d
LC		 1569 /* Finally check that all iftypes that we're currently
1570 * using are actually part of this combination. If they
1571 * aren't then we can't use this combination and have
1572 * to continue to the next.
1573 */
1574 if ((all_iftypes & used_iftypes) != used_iftypes)
1575 goto cont;
1576
1577 /* This combination covered all interface types and
1578 * supported the requested numbers, so we're good.
1579 */
65a124dd
MK		 1580
1581 (*iter)(c, data);
cb2d956d
LC		 1582 cont:
1583 kfree(limits);
1584 }
1585
65a124dd
MK		 1586 return 0;
1587}
1588EXPORT_SYMBOL(cfg80211_iter_combinations);
1589
1590static void
1591cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1592 void *data)
1593{
1594 int *num = data;
1595 (*num)++;
1596}
1597
1598int cfg80211_check_combinations(struct wiphy *wiphy,
1599 const int num_different_channels,
1600 const u8 radar_detect,
1601 const int iftype_num[NUM_NL80211_IFTYPES])
1602{
1603 int err, num = 0;
1604
1605 err = cfg80211_iter_combinations(wiphy, num_different_channels,
1606 radar_detect, iftype_num,
1607 cfg80211_iter_sum_ifcombs, &num);
1608 if (err)
1609 return err;
1610 if (num == 0)
1611 return -EBUSY;
1612
1613 return 0;
cb2d956d
LC		 1614}
1615EXPORT_SYMBOL(cfg80211_check_combinations);
1616
34850ab2
JB		 1617int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1618 const u8 *rates, unsigned int n_rates,
1619 u32 *mask)
1620{
1621 int i, j;
1622
a401d2bb
JB		 1623 if (!sband)
1624 return -EINVAL;
1625
34850ab2
JB		 1626 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1627 return -EINVAL;
1628
1629 *mask = 0;
1630
1631 for (i = 0; i < n_rates; i++) {
1632 int rate = (rates[i] & 0x7f) * 5;
1633 bool found = false;
1634
1635 for (j = 0; j < sband->n_bitrates; j++) {
1636 if (sband->bitrates[j].bitrate == rate) {
1637 found = true;
1638 *mask |= BIT(j);
1639 break;
1640 }
1641 }
1642 if (!found)
1643 return -EINVAL;
1644 }
1645
1646 /*
1647 * mask must have at least one bit set here since we
1648 * didn't accept a 0-length rates array nor allowed
1649 * entries in the array that didn't exist
1650 */
1651
1652 return 0;
1653}
11a2a357 1654
bdfbec2d
IP		 1655unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1656{
1657 enum ieee80211_band band;
1658 unsigned int n_channels = 0;
1659
1660 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1661 if (wiphy->bands[band])
1662 n_channels += wiphy->bands[band]->n_channels;
1663
1664 return n_channels;
1665}
1666EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1667
7406353d
AQ		 1668int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1669 struct station_info *sinfo)
1670{
1671 struct cfg80211_registered_device *rdev;
1672 struct wireless_dev *wdev;
1673
1674 wdev = dev->ieee80211_ptr;
1675 if (!wdev)
1676 return -EOPNOTSUPP;
1677
1678 rdev = wiphy_to_rdev(wdev->wiphy);
1679 if (!rdev->ops->get_station)
1680 return -EOPNOTSUPP;
1681
1682 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1683}
1684EXPORT_SYMBOL(cfg80211_get_station);
1685
11a2a357
JB		 1686/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1687/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1688const unsigned char rfc1042_header[] __aligned(2) =
1689 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1690EXPORT_SYMBOL(rfc1042_header);
1691
1692/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1693const unsigned char bridge_tunnel_header[] __aligned(2) =
1694 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1695EXPORT_SYMBOL(bridge_tunnel_header);
Linux kernel - Deliverables
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