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9#include <linux/export.h>
10#include <linux/bitops.h>
11#include <linux/etherdevice.h>
12#include <linux/slab.h>
13#include <net/cfg80211.h>
14#include <net/ip.h>
15#include <net/dsfield.h>
16#include <linux/if_vlan.h>
17#include <linux/mpls.h>
18#include <linux/gcd.h>
19#include "core.h"
20#include "rdev-ops.h"
21
22
23struct ieee80211_rate *
24ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
25 u32 basic_rates, int bitrate)
26{
27 struct ieee80211_rate *result = &sband->bitrates[0];
28 int i;
29
30 for (i = 0; i < sband->n_bitrates; i++) {
31 if (!(basic_rates & BIT(i)))
32 continue;
33 if (sband->bitrates[i].bitrate > bitrate)
34 continue;
35 result = &sband->bitrates[i];
36 }
37
38 return result;
39}
40EXPORT_SYMBOL(ieee80211_get_response_rate);
41
42u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
43 enum nl80211_bss_scan_width scan_width)
44{
45 struct ieee80211_rate *bitrates;
46 u32 mandatory_rates = 0;
47 enum ieee80211_rate_flags mandatory_flag;
48 int i;
49
50 if (WARN_ON(!sband))
51 return 1;
52
53 if (sband->band == NL80211_BAND_2GHZ) {
54 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
55 scan_width == NL80211_BSS_CHAN_WIDTH_10)
56 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
57 else
58 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
59 } else {
60 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
61 }
62
63 bitrates = sband->bitrates;
64 for (i = 0; i < sband->n_bitrates; i++)
65 if (bitrates[i].flags & mandatory_flag)
66 mandatory_rates |= BIT(i);
67 return mandatory_rates;
68}
69EXPORT_SYMBOL(ieee80211_mandatory_rates);
70
71int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
72{
73
74
75 if (chan <= 0)
76 return 0;
77 switch (band) {
78 case NL80211_BAND_2GHZ:
79 if (chan == 14)
80 return 2484;
81 else if (chan < 14)
82 return 2407 + chan * 5;
83 break;
84 case NL80211_BAND_5GHZ:
85 if (chan >= 182 && chan <= 196)
86 return 4000 + chan * 5;
87 else
88 return 5000 + chan * 5;
89 break;
90 case NL80211_BAND_60GHZ:
91 if (chan < 5)
92 return 56160 + chan * 2160;
93 break;
94 default:
95 ;
96 }
97 return 0;
98}
99EXPORT_SYMBOL(ieee80211_channel_to_frequency);
100
101int ieee80211_frequency_to_channel(int freq)
102{
103
104 if (freq == 2484)
105 return 14;
106 else if (freq < 2484)
107 return (freq - 2407) / 5;
108 else if (freq >= 4910 && freq <= 4980)
109 return (freq - 4000) / 5;
110 else if (freq <= 45000)
111 return (freq - 5000) / 5;
112 else if (freq >= 58320 && freq <= 64800)
113 return (freq - 56160) / 2160;
114 else
115 return 0;
116}
117EXPORT_SYMBOL(ieee80211_frequency_to_channel);
118
119struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq)
120{
121 enum nl80211_band band;
122 struct ieee80211_supported_band *sband;
123 int i;
124
125 for (band = 0; band < NUM_NL80211_BANDS; band++) {
126 sband = wiphy->bands[band];
127
128 if (!sband)
129 continue;
130
131 for (i = 0; i < sband->n_channels; i++) {
132 if (sband->channels[i].center_freq == freq)
133 return &sband->channels[i];
134 }
135 }
136
137 return NULL;
138}
139EXPORT_SYMBOL(ieee80211_get_channel);
140
141static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
142{
143 int i, want;
144
145 switch (sband->band) {
146 case NL80211_BAND_5GHZ:
147 want = 3;
148 for (i = 0; i < sband->n_bitrates; i++) {
149 if (sband->bitrates[i].bitrate == 60 ||
150 sband->bitrates[i].bitrate == 120 ||
151 sband->bitrates[i].bitrate == 240) {
152 sband->bitrates[i].flags |=
153 IEEE80211_RATE_MANDATORY_A;
154 want--;
155 }
156 }
157 WARN_ON(want);
158 break;
159 case NL80211_BAND_2GHZ:
160 want = 7;
161 for (i = 0; i < sband->n_bitrates; i++) {
162 switch (sband->bitrates[i].bitrate) {
163 case 10:
164 case 20:
165 case 55:
166 case 110:
167 sband->bitrates[i].flags |=
168 IEEE80211_RATE_MANDATORY_B |
169 IEEE80211_RATE_MANDATORY_G;
170 want--;
171 break;
172 case 60:
173 case 120:
174 case 240:
175 sband->bitrates[i].flags |=
176 IEEE80211_RATE_MANDATORY_G;
177 want--;
178
179 default:
180 sband->bitrates[i].flags |=
181 IEEE80211_RATE_ERP_G;
182 break;
183 }
184 }
185 WARN_ON(want != 0 && want != 3);
186 break;
187 case NL80211_BAND_60GHZ:
188
189 WARN_ON(!sband->ht_cap.ht_supported);
190 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
191 break;
192 case NUM_NL80211_BANDS:
193 default:
194 WARN_ON(1);
195 break;
196 }
197}
198
199void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
200{
201 enum nl80211_band band;
202
203 for (band = 0; band < NUM_NL80211_BANDS; band++)
204 if (wiphy->bands[band])
205 set_mandatory_flags_band(wiphy->bands[band]);
206}
207
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
217int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
218 struct key_params *params, int key_idx,
219 bool pairwise, const u8 *mac_addr)
220{
221 if (key_idx < 0 || key_idx > 5)
222 return -EINVAL;
223
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
230 switch (params->cipher) {
231 case WLAN_CIPHER_SUITE_TKIP:
232 case WLAN_CIPHER_SUITE_CCMP:
233 case WLAN_CIPHER_SUITE_CCMP_256:
234 case WLAN_CIPHER_SUITE_GCMP:
235 case WLAN_CIPHER_SUITE_GCMP_256:
236
237
238
239
240
241
242 if (pairwise && key_idx)
243 return -EINVAL;
244 break;
245 case WLAN_CIPHER_SUITE_AES_CMAC:
246 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
247 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
248 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
249
250 if (pairwise)
251 return -EINVAL;
252 if (key_idx < 4)
253 return -EINVAL;
254 break;
255 case WLAN_CIPHER_SUITE_WEP40:
256 case WLAN_CIPHER_SUITE_WEP104:
257 if (key_idx > 3)
258 return -EINVAL;
259 default:
260 break;
261 }
262
263 switch (params->cipher) {
264 case WLAN_CIPHER_SUITE_WEP40:
265 if (params->key_len != WLAN_KEY_LEN_WEP40)
266 return -EINVAL;
267 break;
268 case WLAN_CIPHER_SUITE_TKIP:
269 if (params->key_len != WLAN_KEY_LEN_TKIP)
270 return -EINVAL;
271 break;
272 case WLAN_CIPHER_SUITE_CCMP:
273 if (params->key_len != WLAN_KEY_LEN_CCMP)
274 return -EINVAL;
275 break;
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;
288 case WLAN_CIPHER_SUITE_WEP104:
289 if (params->key_len != WLAN_KEY_LEN_WEP104)
290 return -EINVAL;
291 break;
292 case WLAN_CIPHER_SUITE_AES_CMAC:
293 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
294 return -EINVAL;
295 break;
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;
308 default:
309
310
311
312
313
314
315
316 break;
317 }
318
319 if (params->seq) {
320 switch (params->cipher) {
321 case WLAN_CIPHER_SUITE_WEP40:
322 case WLAN_CIPHER_SUITE_WEP104:
323
324 return -EINVAL;
325 case WLAN_CIPHER_SUITE_TKIP:
326 case WLAN_CIPHER_SUITE_CCMP:
327 case WLAN_CIPHER_SUITE_CCMP_256:
328 case WLAN_CIPHER_SUITE_GCMP:
329 case WLAN_CIPHER_SUITE_GCMP_256:
330 case WLAN_CIPHER_SUITE_AES_CMAC:
331 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
332 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
333 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
334 if (params->seq_len != 6)
335 return -EINVAL;
336 break;
337 }
338 }
339
340 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
341 return -EINVAL;
342
343 return 0;
344}
345
346unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
347{
348 unsigned int hdrlen = 24;
349
350 if (ieee80211_is_data(fc)) {
351 if (ieee80211_has_a4(fc))
352 hdrlen = 30;
353 if (ieee80211_is_data_qos(fc)) {
354 hdrlen += IEEE80211_QOS_CTL_LEN;
355 if (ieee80211_has_order(fc))
356 hdrlen += IEEE80211_HT_CTL_LEN;
357 }
358 goto out;
359 }
360
361 if (ieee80211_is_mgmt(fc)) {
362 if (ieee80211_has_order(fc))
363 hdrlen += IEEE80211_HT_CTL_LEN;
364 goto out;
365 }
366
367 if (ieee80211_is_ctl(fc)) {
368
369
370
371
372
373
374
375
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
402static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags)
403{
404 int ae = flags & MESH_FLAGS_AE;
405
406 switch (ae) {
407 default:
408 case 0:
409 return 6;
410 case MESH_FLAGS_AE_A4:
411 return 12;
412 case MESH_FLAGS_AE_A5_A6:
413 return 18;
414 }
415}
416
417unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
418{
419 return __ieee80211_get_mesh_hdrlen(meshhdr->flags);
420}
421EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
422
423int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
424 const u8 *addr, enum nl80211_iftype iftype,
425 u8 data_offset)
426{
427 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
428 struct {
429 u8 hdr[ETH_ALEN] __aligned(2);
430 __be16 proto;
431 } payload;
432 struct ethhdr tmp;
433 u16 hdrlen;
434 u8 mesh_flags = 0;
435
436 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
437 return -1;
438
439 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
440 if (skb->len < hdrlen + 8)
441 return -1;
442
443
444
445
446
447
448
449
450
451
452 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
453 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
454
455 if (iftype == NL80211_IFTYPE_MESH_POINT)
456 skb_copy_bits(skb, hdrlen, &mesh_flags, 1);
457
458 mesh_flags &= MESH_FLAGS_AE;
459
460 switch (hdr->frame_control &
461 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
462 case cpu_to_le16(IEEE80211_FCTL_TODS):
463 if (unlikely(iftype != NL80211_IFTYPE_AP &&
464 iftype != NL80211_IFTYPE_AP_VLAN &&
465 iftype != NL80211_IFTYPE_P2P_GO))
466 return -1;
467 break;
468 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
469 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
470 iftype != NL80211_IFTYPE_MESH_POINT &&
471 iftype != NL80211_IFTYPE_AP_VLAN &&
472 iftype != NL80211_IFTYPE_STATION))
473 return -1;
474 if (iftype == NL80211_IFTYPE_MESH_POINT) {
475 if (mesh_flags == MESH_FLAGS_AE_A4)
476 return -1;
477 if (mesh_flags == MESH_FLAGS_AE_A5_A6) {
478 skb_copy_bits(skb, hdrlen +
479 offsetof(struct ieee80211s_hdr, eaddr1),
480 tmp.h_dest, 2 * ETH_ALEN);
481 }
482 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
483 }
484 break;
485 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
486 if ((iftype != NL80211_IFTYPE_STATION &&
487 iftype != NL80211_IFTYPE_P2P_CLIENT &&
488 iftype != NL80211_IFTYPE_MESH_POINT) ||
489 (is_multicast_ether_addr(tmp.h_dest) &&
490 ether_addr_equal(tmp.h_source, addr)))
491 return -1;
492 if (iftype == NL80211_IFTYPE_MESH_POINT) {
493 if (mesh_flags == MESH_FLAGS_AE_A5_A6)
494 return -1;
495 if (mesh_flags == MESH_FLAGS_AE_A4)
496 skb_copy_bits(skb, hdrlen +
497 offsetof(struct ieee80211s_hdr, eaddr1),
498 tmp.h_source, ETH_ALEN);
499 hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags);
500 }
501 break;
502 case cpu_to_le16(0):
503 if (iftype != NL80211_IFTYPE_ADHOC &&
504 iftype != NL80211_IFTYPE_STATION &&
505 iftype != NL80211_IFTYPE_OCB)
506 return -1;
507 break;
508 }
509
510 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload));
511 tmp.h_proto = payload.proto;
512
513 if (likely((ether_addr_equal(payload.hdr, rfc1042_header) &&
514 tmp.h_proto != htons(ETH_P_AARP) &&
515 tmp.h_proto != htons(ETH_P_IPX)) ||
516 ether_addr_equal(payload.hdr, bridge_tunnel_header)))
517
518
519 hdrlen += ETH_ALEN + 2;
520 else
521 tmp.h_proto = htons(skb->len - hdrlen);
522
523 pskb_pull(skb, hdrlen);
524
525 if (!ehdr)
526 ehdr = skb_push(skb, sizeof(struct ethhdr));
527 memcpy(ehdr, &tmp, sizeof(tmp));
528
529 return 0;
530}
531EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
532
533static void
534__frame_add_frag(struct sk_buff *skb, struct page *page,
535 void *ptr, int len, int size)
536{
537 struct skb_shared_info *sh = skb_shinfo(skb);
538 int page_offset;
539
540 page_ref_inc(page);
541 page_offset = ptr - page_address(page);
542 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size);
543}
544
545static void
546__ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame,
547 int offset, int len)
548{
549 struct skb_shared_info *sh = skb_shinfo(skb);
550 const skb_frag_t *frag = &sh->frags[0];
551 struct page *frag_page;
552 void *frag_ptr;
553 int frag_len, frag_size;
554 int head_size = skb->len - skb->data_len;
555 int cur_len;
556
557 frag_page = virt_to_head_page(skb->head);
558 frag_ptr = skb->data;
559 frag_size = head_size;
560
561 while (offset >= frag_size) {
562 offset -= frag_size;
563 frag_page = skb_frag_page(frag);
564 frag_ptr = skb_frag_address(frag);
565 frag_size = skb_frag_size(frag);
566 frag++;
567 }
568
569 frag_ptr += offset;
570 frag_len = frag_size - offset;
571
572 cur_len = min(len, frag_len);
573
574 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size);
575 len -= cur_len;
576
577 while (len > 0) {
578 frag_len = skb_frag_size(frag);
579 cur_len = min(len, frag_len);
580 __frame_add_frag(frame, skb_frag_page(frag),
581 skb_frag_address(frag), cur_len, frag_len);
582 len -= cur_len;
583 frag++;
584 }
585}
586
587static struct sk_buff *
588__ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen,
589 int offset, int len, bool reuse_frag)
590{
591 struct sk_buff *frame;
592 int cur_len = len;
593
594 if (skb->len - offset < len)
595 return NULL;
596
597
598
599
600
601
602 if (reuse_frag)
603 cur_len = min_t(int, len, 32);
604
605
606
607
608
609 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len);
610 if (!frame)
611 return NULL;
612
613 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
614 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len);
615
616 len -= cur_len;
617 if (!len)
618 return frame;
619
620 offset += cur_len;
621 __ieee80211_amsdu_copy_frag(skb, frame, offset, len);
622
623 return frame;
624}
625
626void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
627 const u8 *addr, enum nl80211_iftype iftype,
628 const unsigned int extra_headroom,
629 const u8 *check_da, const u8 *check_sa)
630{
631 unsigned int hlen = ALIGN(extra_headroom, 4);
632 struct sk_buff *frame = NULL;
633 u16 ethertype;
634 u8 *payload;
635 int offset = 0, remaining;
636 struct ethhdr eth;
637 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb);
638 bool reuse_skb = false;
639 bool last = false;
640
641 while (!last) {
642 unsigned int subframe_len;
643 int len;
644 u8 padding;
645
646 skb_copy_bits(skb, offset, ð, sizeof(eth));
647 len = ntohs(eth.h_proto);
648 subframe_len = sizeof(struct ethhdr) + len;
649 padding = (4 - subframe_len) & 0x3;
650
651
652 remaining = skb->len - offset;
653 if (subframe_len > remaining)
654 goto purge;
655
656 offset += sizeof(struct ethhdr);
657 last = remaining <= subframe_len + padding;
658
659
660 if ((check_da && !is_multicast_ether_addr(eth.h_dest) &&
661 !ether_addr_equal(check_da, eth.h_dest)) ||
662 (check_sa && !ether_addr_equal(check_sa, eth.h_source))) {
663 offset += len + padding;
664 continue;
665 }
666
667
668 if (!skb_is_nonlinear(skb) && !reuse_frag && last) {
669 skb_pull(skb, offset);
670 frame = skb;
671 reuse_skb = true;
672 } else {
673 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len,
674 reuse_frag);
675 if (!frame)
676 goto purge;
677
678 offset += len + padding;
679 }
680
681 skb_reset_network_header(frame);
682 frame->dev = skb->dev;
683 frame->priority = skb->priority;
684
685 payload = frame->data;
686 ethertype = (payload[6] << 8) | payload[7];
687 if (likely((ether_addr_equal(payload, rfc1042_header) &&
688 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
689 ether_addr_equal(payload, bridge_tunnel_header))) {
690 eth.h_proto = htons(ethertype);
691 skb_pull(frame, ETH_ALEN + 2);
692 }
693
694 memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth));
695 __skb_queue_tail(list, frame);
696 }
697
698 if (!reuse_skb)
699 dev_kfree_skb(skb);
700
701 return;
702
703 purge:
704 __skb_queue_purge(list);
705 dev_kfree_skb(skb);
706}
707EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
708
709
710unsigned int cfg80211_classify8021d(struct sk_buff *skb,
711 struct cfg80211_qos_map *qos_map)
712{
713 unsigned int dscp;
714 unsigned char vlan_priority;
715
716
717
718
719
720
721 if (skb->priority >= 256 && skb->priority <= 263)
722 return skb->priority - 256;
723
724 if (skb_vlan_tag_present(skb)) {
725 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
726 >> VLAN_PRIO_SHIFT;
727 if (vlan_priority > 0)
728 return vlan_priority;
729 }
730
731 switch (skb->protocol) {
732 case htons(ETH_P_IP):
733 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
734 break;
735 case htons(ETH_P_IPV6):
736 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
737 break;
738 case htons(ETH_P_MPLS_UC):
739 case htons(ETH_P_MPLS_MC): {
740 struct mpls_label mpls_tmp, *mpls;
741
742 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
743 sizeof(*mpls), &mpls_tmp);
744 if (!mpls)
745 return 0;
746
747 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
748 >> MPLS_LS_TC_SHIFT;
749 }
750 case htons(ETH_P_80221):
751
752 return 7;
753 default:
754 return 0;
755 }
756
757 if (qos_map) {
758 unsigned int i, tmp_dscp = dscp >> 2;
759
760 for (i = 0; i < qos_map->num_des; i++) {
761 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
762 return qos_map->dscp_exception[i].up;
763 }
764
765 for (i = 0; i < 8; i++) {
766 if (tmp_dscp >= qos_map->up[i].low &&
767 tmp_dscp <= qos_map->up[i].high)
768 return i;
769 }
770 }
771
772 return dscp >> 5;
773}
774EXPORT_SYMBOL(cfg80211_classify8021d);
775
776const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
777{
778 const struct cfg80211_bss_ies *ies;
779
780 ies = rcu_dereference(bss->ies);
781 if (!ies)
782 return NULL;
783
784 return cfg80211_find_ie(ie, ies->data, ies->len);
785}
786EXPORT_SYMBOL(ieee80211_bss_get_ie);
787
788void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
789{
790 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
791 struct net_device *dev = wdev->netdev;
792 int i;
793
794 if (!wdev->connect_keys)
795 return;
796
797 for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) {
798 if (!wdev->connect_keys->params[i].cipher)
799 continue;
800 if (rdev_add_key(rdev, dev, i, false, NULL,
801 &wdev->connect_keys->params[i])) {
802 netdev_err(dev, "failed to set key %d\n", i);
803 continue;
804 }
805 if (wdev->connect_keys->def == i &&
806 rdev_set_default_key(rdev, dev, i, true, true)) {
807 netdev_err(dev, "failed to set defkey %d\n", i);
808 continue;
809 }
810 }
811
812 kzfree(wdev->connect_keys);
813 wdev->connect_keys = NULL;
814}
815
816void cfg80211_process_wdev_events(struct wireless_dev *wdev)
817{
818 struct cfg80211_event *ev;
819 unsigned long flags;
820
821 spin_lock_irqsave(&wdev->event_lock, flags);
822 while (!list_empty(&wdev->event_list)) {
823 ev = list_first_entry(&wdev->event_list,
824 struct cfg80211_event, list);
825 list_del(&ev->list);
826 spin_unlock_irqrestore(&wdev->event_lock, flags);
827
828 wdev_lock(wdev);
829 switch (ev->type) {
830 case EVENT_CONNECT_RESULT:
831 __cfg80211_connect_result(
832 wdev->netdev,
833 &ev->cr,
834 ev->cr.status == WLAN_STATUS_SUCCESS);
835 break;
836 case EVENT_ROAMED:
837 __cfg80211_roamed(wdev, &ev->rm);
838 break;
839 case EVENT_DISCONNECTED:
840 __cfg80211_disconnected(wdev->netdev,
841 ev->dc.ie, ev->dc.ie_len,
842 ev->dc.reason,
843 !ev->dc.locally_generated);
844 break;
845 case EVENT_IBSS_JOINED:
846 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
847 ev->ij.channel);
848 break;
849 case EVENT_STOPPED:
850 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
851 break;
852 case EVENT_PORT_AUTHORIZED:
853 __cfg80211_port_authorized(wdev, ev->pa.bssid);
854 break;
855 }
856 wdev_unlock(wdev);
857
858 kfree(ev);
859
860 spin_lock_irqsave(&wdev->event_lock, flags);
861 }
862 spin_unlock_irqrestore(&wdev->event_lock, flags);
863}
864
865void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
866{
867 struct wireless_dev *wdev;
868
869 ASSERT_RTNL();
870
871 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
872 cfg80211_process_wdev_events(wdev);
873}
874
875int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
876 struct net_device *dev, enum nl80211_iftype ntype,
877 struct vif_params *params)
878{
879 int err;
880 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
881
882 ASSERT_RTNL();
883
884
885 if (otype == NL80211_IFTYPE_AP_VLAN)
886 return -EOPNOTSUPP;
887
888
889 if (ntype == NL80211_IFTYPE_P2P_DEVICE ||
890 ntype == NL80211_IFTYPE_NAN)
891 return -EOPNOTSUPP;
892
893 if (!rdev->ops->change_virtual_intf ||
894 !(rdev->wiphy.interface_modes & (1 << ntype)))
895 return -EOPNOTSUPP;
896
897
898 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
899 (ntype == NL80211_IFTYPE_ADHOC ||
900 ntype == NL80211_IFTYPE_STATION ||
901 ntype == NL80211_IFTYPE_P2P_CLIENT))
902 return -EBUSY;
903
904 if (ntype != otype) {
905 dev->ieee80211_ptr->use_4addr = false;
906 dev->ieee80211_ptr->mesh_id_up_len = 0;
907 wdev_lock(dev->ieee80211_ptr);
908 rdev_set_qos_map(rdev, dev, NULL);
909 wdev_unlock(dev->ieee80211_ptr);
910
911 switch (otype) {
912 case NL80211_IFTYPE_AP:
913 cfg80211_stop_ap(rdev, dev, true);
914 break;
915 case NL80211_IFTYPE_ADHOC:
916 cfg80211_leave_ibss(rdev, dev, false);
917 break;
918 case NL80211_IFTYPE_STATION:
919 case NL80211_IFTYPE_P2P_CLIENT:
920 wdev_lock(dev->ieee80211_ptr);
921 cfg80211_disconnect(rdev, dev,
922 WLAN_REASON_DEAUTH_LEAVING, true);
923 wdev_unlock(dev->ieee80211_ptr);
924 break;
925 case NL80211_IFTYPE_MESH_POINT:
926
927 break;
928 default:
929 break;
930 }
931
932 cfg80211_process_rdev_events(rdev);
933 }
934
935 err = rdev_change_virtual_intf(rdev, dev, ntype, params);
936
937 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
938
939 if (!err && params && params->use_4addr != -1)
940 dev->ieee80211_ptr->use_4addr = params->use_4addr;
941
942 if (!err) {
943 dev->priv_flags &= ~IFF_DONT_BRIDGE;
944 switch (ntype) {
945 case NL80211_IFTYPE_STATION:
946 if (dev->ieee80211_ptr->use_4addr)
947 break;
948
949 case NL80211_IFTYPE_OCB:
950 case NL80211_IFTYPE_P2P_CLIENT:
951 case NL80211_IFTYPE_ADHOC:
952 dev->priv_flags |= IFF_DONT_BRIDGE;
953 break;
954 case NL80211_IFTYPE_P2P_GO:
955 case NL80211_IFTYPE_AP:
956 case NL80211_IFTYPE_AP_VLAN:
957 case NL80211_IFTYPE_WDS:
958 case NL80211_IFTYPE_MESH_POINT:
959
960 break;
961 case NL80211_IFTYPE_MONITOR:
962
963 break;
964 case NL80211_IFTYPE_UNSPECIFIED:
965 case NUM_NL80211_IFTYPES:
966
967 break;
968 case NL80211_IFTYPE_P2P_DEVICE:
969 case NL80211_IFTYPE_NAN:
970 WARN_ON(1);
971 break;
972 }
973 }
974
975 if (!err && ntype != otype && netif_running(dev)) {
976 cfg80211_update_iface_num(rdev, ntype, 1);
977 cfg80211_update_iface_num(rdev, otype, -1);
978 }
979
980 return err;
981}
982
983static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate)
984{
985 int modulation, streams, bitrate;
986
987
988 if (WARN_ON_ONCE(rate->mcs >= 32))
989 return 0;
990
991 modulation = rate->mcs & 7;
992 streams = (rate->mcs >> 3) + 1;
993
994 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
995
996 if (modulation < 4)
997 bitrate *= (modulation + 1);
998 else if (modulation == 4)
999 bitrate *= (modulation + 2);
1000 else
1001 bitrate *= (modulation + 3);
1002
1003 bitrate *= streams;
1004
1005 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1006 bitrate = (bitrate / 9) * 10;
1007
1008
1009 return (bitrate + 50000) / 100000;
1010}
1011
1012static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1013{
1014 static const u32 __mcs2bitrate[] = {
1015
1016 [0] = 275,
1017
1018 [1] = 3850,
1019 [2] = 7700,
1020 [3] = 9625,
1021 [4] = 11550,
1022 [5] = 12512,
1023 [6] = 15400,
1024 [7] = 19250,
1025 [8] = 23100,
1026 [9] = 25025,
1027 [10] = 30800,
1028 [11] = 38500,
1029 [12] = 46200,
1030
1031 [13] = 6930,
1032 [14] = 8662,
1033 [15] = 13860,
1034 [16] = 17325,
1035 [17] = 20790,
1036 [18] = 27720,
1037 [19] = 34650,
1038 [20] = 41580,
1039 [21] = 45045,
1040 [22] = 51975,
1041 [23] = 62370,
1042 [24] = 67568,
1043
1044 [25] = 6260,
1045 [26] = 8340,
1046 [27] = 11120,
1047 [28] = 12510,
1048 [29] = 16680,
1049 [30] = 22240,
1050 [31] = 25030,
1051 };
1052
1053 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1054 return 0;
1055
1056 return __mcs2bitrate[rate->mcs];
1057}
1058
1059static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1060{
1061 static const u32 base[4][10] = {
1062 { 6500000,
1063 13000000,
1064 19500000,
1065 26000000,
1066 39000000,
1067 52000000,
1068 58500000,
1069 65000000,
1070 78000000,
1071
1072 86500000,
1073 },
1074 { 13500000,
1075 27000000,
1076 40500000,
1077 54000000,
1078 81000000,
1079 108000000,
1080 121500000,
1081 135000000,
1082 162000000,
1083 180000000,
1084 },
1085 { 29300000,
1086 58500000,
1087 87800000,
1088 117000000,
1089 175500000,
1090 234000000,
1091 263300000,
1092 292500000,
1093 351000000,
1094 390000000,
1095 },
1096 { 58500000,
1097 117000000,
1098 175500000,
1099 234000000,
1100 351000000,
1101 468000000,
1102 526500000,
1103 585000000,
1104 702000000,
1105 780000000,
1106 },
1107 };
1108 u32 bitrate;
1109 int idx;
1110
1111 if (rate->mcs > 9)
1112 goto warn;
1113
1114 switch (rate->bw) {
1115 case RATE_INFO_BW_160:
1116 idx = 3;
1117 break;
1118 case RATE_INFO_BW_80:
1119 idx = 2;
1120 break;
1121 case RATE_INFO_BW_40:
1122 idx = 1;
1123 break;
1124 case RATE_INFO_BW_5:
1125 case RATE_INFO_BW_10:
1126 default:
1127 goto warn;
1128 case RATE_INFO_BW_20:
1129 idx = 0;
1130 }
1131
1132 bitrate = base[idx][rate->mcs];
1133 bitrate *= rate->nss;
1134
1135 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1136 bitrate = (bitrate / 9) * 10;
1137
1138
1139 return (bitrate + 50000) / 100000;
1140 warn:
1141 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n",
1142 rate->bw, rate->mcs, rate->nss);
1143 return 0;
1144}
1145
1146static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
1147{
1148#define SCALE 2048
1149 u16 mcs_divisors[12] = {
1150 34133,
1151 17067,
1152 11378,
1153 8533,
1154 5689,
1155 4267,
1156 3923,
1157 3413,
1158 2844,
1159 2560,
1160 2276,
1161 2048,
1162 };
1163 u32 rates_160M[3] = { 960777777, 907400000, 816666666 };
1164 u32 rates_969[3] = { 480388888, 453700000, 408333333 };
1165 u32 rates_484[3] = { 229411111, 216666666, 195000000 };
1166 u32 rates_242[3] = { 114711111, 108333333, 97500000 };
1167 u32 rates_106[3] = { 40000000, 37777777, 34000000 };
1168 u32 rates_52[3] = { 18820000, 17777777, 16000000 };
1169 u32 rates_26[3] = { 9411111, 8888888, 8000000 };
1170 u64 tmp;
1171 u32 result;
1172
1173 if (WARN_ON_ONCE(rate->mcs > 11))
1174 return 0;
1175
1176 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2))
1177 return 0;
1178 if (WARN_ON_ONCE(rate->he_ru_alloc >
1179 NL80211_RATE_INFO_HE_RU_ALLOC_2x996))
1180 return 0;
1181 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
1182 return 0;
1183
1184 if (rate->bw == RATE_INFO_BW_160)
1185 result = rates_160M[rate->he_gi];
1186 else if (rate->bw == RATE_INFO_BW_80 ||
1187 (rate->bw == RATE_INFO_BW_HE_RU &&
1188 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996))
1189 result = rates_969[rate->he_gi];
1190 else if (rate->bw == RATE_INFO_BW_40 ||
1191 (rate->bw == RATE_INFO_BW_HE_RU &&
1192 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484))
1193 result = rates_484[rate->he_gi];
1194 else if (rate->bw == RATE_INFO_BW_20 ||
1195 (rate->bw == RATE_INFO_BW_HE_RU &&
1196 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242))
1197 result = rates_242[rate->he_gi];
1198 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1199 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106)
1200 result = rates_106[rate->he_gi];
1201 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1202 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52)
1203 result = rates_52[rate->he_gi];
1204 else if (rate->bw == RATE_INFO_BW_HE_RU &&
1205 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26)
1206 result = rates_26[rate->he_gi];
1207 else if (WARN(1, "invalid HE MCS: bw:%d, ru:%d\n",
1208 rate->bw, rate->he_ru_alloc))
1209 return 0;
1210
1211
1212 tmp = result;
1213 tmp *= SCALE;
1214 do_div(tmp, mcs_divisors[rate->mcs]);
1215 result = tmp;
1216
1217
1218 result = (result * rate->nss) / 8;
1219 if (rate->he_dcm)
1220 result /= 2;
1221
1222 return result;
1223}
1224
1225u32 cfg80211_calculate_bitrate(struct rate_info *rate)
1226{
1227 if (rate->flags & RATE_INFO_FLAGS_MCS)
1228 return cfg80211_calculate_bitrate_ht(rate);
1229 if (rate->flags & RATE_INFO_FLAGS_60G)
1230 return cfg80211_calculate_bitrate_60g(rate);
1231 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1232 return cfg80211_calculate_bitrate_vht(rate);
1233 if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
1234 return cfg80211_calculate_bitrate_he(rate);
1235
1236 return rate->legacy;
1237}
1238EXPORT_SYMBOL(cfg80211_calculate_bitrate);
1239
1240int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1241 enum ieee80211_p2p_attr_id attr,
1242 u8 *buf, unsigned int bufsize)
1243{
1244 u8 *out = buf;
1245 u16 attr_remaining = 0;
1246 bool desired_attr = false;
1247 u16 desired_len = 0;
1248
1249 while (len > 0) {
1250 unsigned int iedatalen;
1251 unsigned int copy;
1252 const u8 *iedata;
1253
1254 if (len < 2)
1255 return -EILSEQ;
1256 iedatalen = ies[1];
1257 if (iedatalen + 2 > len)
1258 return -EILSEQ;
1259
1260 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1261 goto cont;
1262
1263 if (iedatalen < 4)
1264 goto cont;
1265
1266 iedata = ies + 2;
1267
1268
1269 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1270 iedata[2] != 0x9a || iedata[3] != 0x09)
1271 goto cont;
1272
1273 iedatalen -= 4;
1274 iedata += 4;
1275
1276
1277 copy = min_t(unsigned int, attr_remaining, iedatalen);
1278 if (copy && desired_attr) {
1279 desired_len += copy;
1280 if (out) {
1281 memcpy(out, iedata, min(bufsize, copy));
1282 out += min(bufsize, copy);
1283 bufsize -= min(bufsize, copy);
1284 }
1285
1286
1287 if (copy == attr_remaining)
1288 return desired_len;
1289 }
1290
1291 attr_remaining -= copy;
1292 if (attr_remaining)
1293 goto cont;
1294
1295 iedatalen -= copy;
1296 iedata += copy;
1297
1298 while (iedatalen > 0) {
1299 u16 attr_len;
1300
1301
1302 if (iedatalen < 3)
1303 return -EILSEQ;
1304 desired_attr = iedata[0] == attr;
1305 attr_len = get_unaligned_le16(iedata + 1);
1306 iedatalen -= 3;
1307 iedata += 3;
1308
1309 copy = min_t(unsigned int, attr_len, iedatalen);
1310
1311 if (desired_attr) {
1312 desired_len += copy;
1313 if (out) {
1314 memcpy(out, iedata, min(bufsize, copy));
1315 out += min(bufsize, copy);
1316 bufsize -= min(bufsize, copy);
1317 }
1318
1319 if (copy == attr_len)
1320 return desired_len;
1321 }
1322
1323 iedata += copy;
1324 iedatalen -= copy;
1325 attr_remaining = attr_len - copy;
1326 }
1327
1328 cont:
1329 len -= ies[1] + 2;
1330 ies += ies[1] + 2;
1331 }
1332
1333 if (attr_remaining && desired_attr)
1334 return -EILSEQ;
1335
1336 return -ENOENT;
1337}
1338EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1339
1340static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext)
1341{
1342 int i;
1343
1344
1345 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION))
1346 return false;
1347
1348 i = 0;
1349 while (i < n_ids) {
1350 if (ids[i] == WLAN_EID_EXTENSION) {
1351 if (id_ext && (ids[i + 1] == id))
1352 return true;
1353
1354 i += 2;
1355 continue;
1356 }
1357
1358 if (ids[i] == id && !id_ext)
1359 return true;
1360
1361 i++;
1362 }
1363 return false;
1364}
1365
1366static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos)
1367{
1368
1369 u8 len = ies[pos + 1];
1370
1371 pos += 2 + len;
1372
1373
1374 if (len < 255)
1375 return pos;
1376
1377 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) {
1378 len = ies[pos + 1];
1379 pos += 2 + len;
1380 }
1381
1382 return pos;
1383}
1384
1385size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
1386 const u8 *ids, int n_ids,
1387 const u8 *after_ric, int n_after_ric,
1388 size_t offset)
1389{
1390 size_t pos = offset;
1391
1392 while (pos < ielen) {
1393 u8 ext = 0;
1394
1395 if (ies[pos] == WLAN_EID_EXTENSION)
1396 ext = 2;
1397 if ((pos + ext) >= ielen)
1398 break;
1399
1400 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext],
1401 ies[pos] == WLAN_EID_EXTENSION))
1402 break;
1403
1404 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
1405 pos = skip_ie(ies, ielen, pos);
1406
1407 while (pos < ielen) {
1408 if (ies[pos] == WLAN_EID_EXTENSION)
1409 ext = 2;
1410 else
1411 ext = 0;
1412
1413 if ((pos + ext) >= ielen)
1414 break;
1415
1416 if (!ieee80211_id_in_list(after_ric,
1417 n_after_ric,
1418 ies[pos + ext],
1419 ext == 2))
1420 pos = skip_ie(ies, ielen, pos);
1421 }
1422 } else {
1423 pos = skip_ie(ies, ielen, pos);
1424 }
1425 }
1426
1427 return pos;
1428}
1429EXPORT_SYMBOL(ieee80211_ie_split_ric);
1430
1431bool ieee80211_operating_class_to_band(u8 operating_class,
1432 enum nl80211_band *band)
1433{
1434 switch (operating_class) {
1435 case 112:
1436 case 115 ... 127:
1437 case 128 ... 130:
1438 *band = NL80211_BAND_5GHZ;
1439 return true;
1440 case 81:
1441 case 82:
1442 case 83:
1443 case 84:
1444 *band = NL80211_BAND_2GHZ;
1445 return true;
1446 case 180:
1447 *band = NL80211_BAND_60GHZ;
1448 return true;
1449 }
1450
1451 return false;
1452}
1453EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1454
1455bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
1456 u8 *op_class)
1457{
1458 u8 vht_opclass;
1459 u32 freq = chandef->center_freq1;
1460
1461 if (freq >= 2412 && freq <= 2472) {
1462 if (chandef->width > NL80211_CHAN_WIDTH_40)
1463 return false;
1464
1465
1466 if (chandef->width == NL80211_CHAN_WIDTH_40) {
1467 if (freq > chandef->chan->center_freq)
1468 *op_class = 83;
1469 else
1470 *op_class = 84;
1471 } else {
1472 *op_class = 81;
1473 }
1474
1475 return true;
1476 }
1477
1478 if (freq == 2484) {
1479 if (chandef->width > NL80211_CHAN_WIDTH_40)
1480 return false;
1481
1482 *op_class = 82;
1483 return true;
1484 }
1485
1486 switch (chandef->width) {
1487 case NL80211_CHAN_WIDTH_80:
1488 vht_opclass = 128;
1489 break;
1490 case NL80211_CHAN_WIDTH_160:
1491 vht_opclass = 129;
1492 break;
1493 case NL80211_CHAN_WIDTH_80P80:
1494 vht_opclass = 130;
1495 break;
1496 case NL80211_CHAN_WIDTH_10:
1497 case NL80211_CHAN_WIDTH_5:
1498 return false;
1499 default:
1500 vht_opclass = 0;
1501 break;
1502 }
1503
1504
1505 if (freq >= 5180 && freq <= 5240) {
1506 if (vht_opclass) {
1507 *op_class = vht_opclass;
1508 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1509 if (freq > chandef->chan->center_freq)
1510 *op_class = 116;
1511 else
1512 *op_class = 117;
1513 } else {
1514 *op_class = 115;
1515 }
1516
1517 return true;
1518 }
1519
1520
1521 if (freq >= 5260 && freq <= 5320) {
1522 if (vht_opclass) {
1523 *op_class = vht_opclass;
1524 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1525 if (freq > chandef->chan->center_freq)
1526 *op_class = 119;
1527 else
1528 *op_class = 120;
1529 } else {
1530 *op_class = 118;
1531 }
1532
1533 return true;
1534 }
1535
1536
1537 if (freq >= 5500 && freq <= 5720) {
1538 if (vht_opclass) {
1539 *op_class = vht_opclass;
1540 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1541 if (freq > chandef->chan->center_freq)
1542 *op_class = 122;
1543 else
1544 *op_class = 123;
1545 } else {
1546 *op_class = 121;
1547 }
1548
1549 return true;
1550 }
1551
1552
1553 if (freq >= 5745 && freq <= 5845) {
1554 if (vht_opclass) {
1555 *op_class = vht_opclass;
1556 } else if (chandef->width == NL80211_CHAN_WIDTH_40) {
1557 if (freq > chandef->chan->center_freq)
1558 *op_class = 126;
1559 else
1560 *op_class = 127;
1561 } else if (freq <= 5805) {
1562 *op_class = 124;
1563 } else {
1564 *op_class = 125;
1565 }
1566
1567 return true;
1568 }
1569
1570
1571 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
1572 if (chandef->width >= NL80211_CHAN_WIDTH_40)
1573 return false;
1574
1575 *op_class = 180;
1576 return true;
1577 }
1578
1579
1580 return false;
1581}
1582EXPORT_SYMBOL(ieee80211_chandef_to_operating_class);
1583
1584static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int,
1585 u32 *beacon_int_gcd,
1586 bool *beacon_int_different)
1587{
1588 struct wireless_dev *wdev;
1589
1590 *beacon_int_gcd = 0;
1591 *beacon_int_different = false;
1592
1593 list_for_each_entry(wdev, &wiphy->wdev_list, list) {
1594 if (!wdev->beacon_interval)
1595 continue;
1596
1597 if (!*beacon_int_gcd) {
1598 *beacon_int_gcd = wdev->beacon_interval;
1599 continue;
1600 }
1601
1602 if (wdev->beacon_interval == *beacon_int_gcd)
1603 continue;
1604
1605 *beacon_int_different = true;
1606 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval);
1607 }
1608
1609 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) {
1610 if (*beacon_int_gcd)
1611 *beacon_int_different = true;
1612 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int);
1613 }
1614}
1615
1616int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1617 enum nl80211_iftype iftype, u32 beacon_int)
1618{
1619
1620
1621
1622
1623
1624
1625
1626
1627 if (beacon_int < 10 || beacon_int > 10000)
1628 return -EINVAL;
1629
1630 return 0;
1631}
1632
1633int cfg80211_iter_combinations(struct wiphy *wiphy,
1634 struct iface_combination_params *params,
1635 void (*iter)(const struct ieee80211_iface_combination *c,
1636 void *data),
1637 void *data)
1638{
1639 const struct ieee80211_regdomain *regdom;
1640 enum nl80211_dfs_regions region = 0;
1641 int i, j, iftype;
1642 int num_interfaces = 0;
1643 u32 used_iftypes = 0;
1644 u32 beacon_int_gcd;
1645 bool beacon_int_different;
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int,
1658 &beacon_int_gcd, &beacon_int_different);
1659
1660 if (params->radar_detect) {
1661 rcu_read_lock();
1662 regdom = rcu_dereference(cfg80211_regdomain);
1663 if (regdom)
1664 region = regdom->dfs_region;
1665 rcu_read_unlock();
1666 }
1667
1668 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1669 num_interfaces += params->iftype_num[iftype];
1670 if (params->iftype_num[iftype] > 0 &&
1671 !(wiphy->software_iftypes & BIT(iftype)))
1672 used_iftypes |= BIT(iftype);
1673 }
1674
1675 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1676 const struct ieee80211_iface_combination *c;
1677 struct ieee80211_iface_limit *limits;
1678 u32 all_iftypes = 0;
1679
1680 c = &wiphy->iface_combinations[i];
1681
1682 if (num_interfaces > c->max_interfaces)
1683 continue;
1684 if (params->num_different_channels > c->num_different_channels)
1685 continue;
1686
1687 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1688 GFP_KERNEL);
1689 if (!limits)
1690 return -ENOMEM;
1691
1692 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1693 if (wiphy->software_iftypes & BIT(iftype))
1694 continue;
1695 for (j = 0; j < c->n_limits; j++) {
1696 all_iftypes |= limits[j].types;
1697 if (!(limits[j].types & BIT(iftype)))
1698 continue;
1699 if (limits[j].max < params->iftype_num[iftype])
1700 goto cont;
1701 limits[j].max -= params->iftype_num[iftype];
1702 }
1703 }
1704
1705 if (params->radar_detect !=
1706 (c->radar_detect_widths & params->radar_detect))
1707 goto cont;
1708
1709 if (params->radar_detect && c->radar_detect_regions &&
1710 !(c->radar_detect_regions & BIT(region)))
1711 goto cont;
1712
1713
1714
1715
1716
1717
1718 if ((all_iftypes & used_iftypes) != used_iftypes)
1719 goto cont;
1720
1721 if (beacon_int_gcd) {
1722 if (c->beacon_int_min_gcd &&
1723 beacon_int_gcd < c->beacon_int_min_gcd)
1724 goto cont;
1725 if (!c->beacon_int_min_gcd && beacon_int_different)
1726 goto cont;
1727 }
1728
1729
1730
1731
1732
1733 (*iter)(c, data);
1734 cont:
1735 kfree(limits);
1736 }
1737
1738 return 0;
1739}
1740EXPORT_SYMBOL(cfg80211_iter_combinations);
1741
1742static void
1743cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1744 void *data)
1745{
1746 int *num = data;
1747 (*num)++;
1748}
1749
1750int cfg80211_check_combinations(struct wiphy *wiphy,
1751 struct iface_combination_params *params)
1752{
1753 int err, num = 0;
1754
1755 err = cfg80211_iter_combinations(wiphy, params,
1756 cfg80211_iter_sum_ifcombs, &num);
1757 if (err)
1758 return err;
1759 if (num == 0)
1760 return -EBUSY;
1761
1762 return 0;
1763}
1764EXPORT_SYMBOL(cfg80211_check_combinations);
1765
1766int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1767 const u8 *rates, unsigned int n_rates,
1768 u32 *mask)
1769{
1770 int i, j;
1771
1772 if (!sband)
1773 return -EINVAL;
1774
1775 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1776 return -EINVAL;
1777
1778 *mask = 0;
1779
1780 for (i = 0; i < n_rates; i++) {
1781 int rate = (rates[i] & 0x7f) * 5;
1782 bool found = false;
1783
1784 for (j = 0; j < sband->n_bitrates; j++) {
1785 if (sband->bitrates[j].bitrate == rate) {
1786 found = true;
1787 *mask |= BIT(j);
1788 break;
1789 }
1790 }
1791 if (!found)
1792 return -EINVAL;
1793 }
1794
1795
1796
1797
1798
1799
1800
1801 return 0;
1802}
1803
1804unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1805{
1806 enum nl80211_band band;
1807 unsigned int n_channels = 0;
1808
1809 for (band = 0; band < NUM_NL80211_BANDS; band++)
1810 if (wiphy->bands[band])
1811 n_channels += wiphy->bands[band]->n_channels;
1812
1813 return n_channels;
1814}
1815EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1816
1817int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1818 struct station_info *sinfo)
1819{
1820 struct cfg80211_registered_device *rdev;
1821 struct wireless_dev *wdev;
1822
1823 wdev = dev->ieee80211_ptr;
1824 if (!wdev)
1825 return -EOPNOTSUPP;
1826
1827 rdev = wiphy_to_rdev(wdev->wiphy);
1828 if (!rdev->ops->get_station)
1829 return -EOPNOTSUPP;
1830
1831 memset(sinfo, 0, sizeof(*sinfo));
1832
1833 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1834}
1835EXPORT_SYMBOL(cfg80211_get_station);
1836
1837void cfg80211_free_nan_func(struct cfg80211_nan_func *f)
1838{
1839 int i;
1840
1841 if (!f)
1842 return;
1843
1844 kfree(f->serv_spec_info);
1845 kfree(f->srf_bf);
1846 kfree(f->srf_macs);
1847 for (i = 0; i < f->num_rx_filters; i++)
1848 kfree(f->rx_filters[i].filter);
1849
1850 for (i = 0; i < f->num_tx_filters; i++)
1851 kfree(f->tx_filters[i].filter);
1852
1853 kfree(f->rx_filters);
1854 kfree(f->tx_filters);
1855 kfree(f);
1856}
1857EXPORT_SYMBOL(cfg80211_free_nan_func);
1858
1859bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
1860 u32 center_freq_khz, u32 bw_khz)
1861{
1862 u32 start_freq_khz, end_freq_khz;
1863
1864 start_freq_khz = center_freq_khz - (bw_khz / 2);
1865 end_freq_khz = center_freq_khz + (bw_khz / 2);
1866
1867 if (start_freq_khz >= freq_range->start_freq_khz &&
1868 end_freq_khz <= freq_range->end_freq_khz)
1869 return true;
1870
1871 return false;
1872}
1873
1874int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp)
1875{
1876 sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1,
1877 sizeof(*(sinfo->pertid)),
1878 gfp);
1879 if (!sinfo->pertid)
1880 return -ENOMEM;
1881
1882 return 0;
1883}
1884EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats);
1885
1886
1887
1888const unsigned char rfc1042_header[] __aligned(2) =
1889 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1890EXPORT_SYMBOL(rfc1042_header);
1891
1892
1893const unsigned char bridge_tunnel_header[] __aligned(2) =
1894 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1895EXPORT_SYMBOL(bridge_tunnel_header);
1896
