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5
6#include <linux/export.h>
7#include <linux/bitops.h>
8#include <linux/etherdevice.h>
9#include <linux/slab.h>
10#include <net/cfg80211.h>
11#include <net/ip.h>
12#include <net/dsfield.h>
13#include "core.h"
14
15struct ieee80211_rate *
16ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
17 u32 basic_rates, int bitrate)
18{
19 struct ieee80211_rate *result = &sband->bitrates[0];
20 int i;
21
22 for (i = 0; i < sband->n_bitrates; i++) {
23 if (!(basic_rates & BIT(i)))
24 continue;
25 if (sband->bitrates[i].bitrate > bitrate)
26 continue;
27 result = &sband->bitrates[i];
28 }
29
30 return result;
31}
32EXPORT_SYMBOL(ieee80211_get_response_rate);
33
34int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
35{
36
37
38 if (chan <= 0)
39 return 0;
40 switch (band) {
41 case IEEE80211_BAND_2GHZ:
42 if (chan == 14)
43 return 2484;
44 else if (chan < 14)
45 return 2407 + chan * 5;
46 break;
47 case IEEE80211_BAND_5GHZ:
48 if (chan >= 182 && chan <= 196)
49 return 4000 + chan * 5;
50 else
51 return 5000 + chan * 5;
52 break;
53 case IEEE80211_BAND_60GHZ:
54 if (chan < 5)
55 return 56160 + chan * 2160;
56 break;
57 default:
58 ;
59 }
60 return 0;
61}
62EXPORT_SYMBOL(ieee80211_channel_to_frequency);
63
64int ieee80211_frequency_to_channel(int freq)
65{
66
67 if (freq == 2484)
68 return 14;
69 else if (freq < 2484)
70 return (freq - 2407) / 5;
71 else if (freq >= 4910 && freq <= 4980)
72 return (freq - 4000) / 5;
73 else if (freq <= 45000)
74 return (freq - 5000) / 5;
75 else if (freq >= 58320 && freq <= 64800)
76 return (freq - 56160) / 2160;
77 else
78 return 0;
79}
80EXPORT_SYMBOL(ieee80211_frequency_to_channel);
81
82struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
83 int freq)
84{
85 enum ieee80211_band band;
86 struct ieee80211_supported_band *sband;
87 int i;
88
89 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
90 sband = wiphy->bands[band];
91
92 if (!sband)
93 continue;
94
95 for (i = 0; i < sband->n_channels; i++) {
96 if (sband->channels[i].center_freq == freq)
97 return &sband->channels[i];
98 }
99 }
100
101 return NULL;
102}
103EXPORT_SYMBOL(__ieee80211_get_channel);
104
105static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
106 enum ieee80211_band band)
107{
108 int i, want;
109
110 switch (band) {
111 case IEEE80211_BAND_5GHZ:
112 want = 3;
113 for (i = 0; i < sband->n_bitrates; i++) {
114 if (sband->bitrates[i].bitrate == 60 ||
115 sband->bitrates[i].bitrate == 120 ||
116 sband->bitrates[i].bitrate == 240) {
117 sband->bitrates[i].flags |=
118 IEEE80211_RATE_MANDATORY_A;
119 want--;
120 }
121 }
122 WARN_ON(want);
123 break;
124 case IEEE80211_BAND_2GHZ:
125 want = 7;
126 for (i = 0; i < sband->n_bitrates; i++) {
127 if (sband->bitrates[i].bitrate == 10) {
128 sband->bitrates[i].flags |=
129 IEEE80211_RATE_MANDATORY_B |
130 IEEE80211_RATE_MANDATORY_G;
131 want--;
132 }
133
134 if (sband->bitrates[i].bitrate == 20 ||
135 sband->bitrates[i].bitrate == 55 ||
136 sband->bitrates[i].bitrate == 110 ||
137 sband->bitrates[i].bitrate == 60 ||
138 sband->bitrates[i].bitrate == 120 ||
139 sband->bitrates[i].bitrate == 240) {
140 sband->bitrates[i].flags |=
141 IEEE80211_RATE_MANDATORY_G;
142 want--;
143 }
144
145 if (sband->bitrates[i].bitrate != 10 &&
146 sband->bitrates[i].bitrate != 20 &&
147 sband->bitrates[i].bitrate != 55 &&
148 sband->bitrates[i].bitrate != 110)
149 sband->bitrates[i].flags |=
150 IEEE80211_RATE_ERP_G;
151 }
152 WARN_ON(want != 0 && want != 3 && want != 6);
153 break;
154 case IEEE80211_BAND_60GHZ:
155
156 WARN_ON(!sband->ht_cap.ht_supported);
157 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
158 break;
159 case IEEE80211_NUM_BANDS:
160 WARN_ON(1);
161 break;
162 }
163}
164
165void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
166{
167 enum ieee80211_band band;
168
169 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
170 if (wiphy->bands[band])
171 set_mandatory_flags_band(wiphy->bands[band], band);
172}
173
174bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
175{
176 int i;
177 for (i = 0; i < wiphy->n_cipher_suites; i++)
178 if (cipher == wiphy->cipher_suites[i])
179 return true;
180 return false;
181}
182
183int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
184 struct key_params *params, int key_idx,
185 bool pairwise, const u8 *mac_addr)
186{
187 if (key_idx > 5)
188 return -EINVAL;
189
190 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
191 return -EINVAL;
192
193 if (pairwise && !mac_addr)
194 return -EINVAL;
195
196
197
198
199
200
201
202
203 if (pairwise && key_idx &&
204 ((params->cipher == WLAN_CIPHER_SUITE_TKIP) ||
205 (params->cipher == WLAN_CIPHER_SUITE_CCMP) ||
206 (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC)))
207 return -EINVAL;
208
209 switch (params->cipher) {
210 case WLAN_CIPHER_SUITE_WEP40:
211 if (params->key_len != WLAN_KEY_LEN_WEP40)
212 return -EINVAL;
213 break;
214 case WLAN_CIPHER_SUITE_TKIP:
215 if (params->key_len != WLAN_KEY_LEN_TKIP)
216 return -EINVAL;
217 break;
218 case WLAN_CIPHER_SUITE_CCMP:
219 if (params->key_len != WLAN_KEY_LEN_CCMP)
220 return -EINVAL;
221 break;
222 case WLAN_CIPHER_SUITE_WEP104:
223 if (params->key_len != WLAN_KEY_LEN_WEP104)
224 return -EINVAL;
225 break;
226 case WLAN_CIPHER_SUITE_AES_CMAC:
227 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
228 return -EINVAL;
229 break;
230 default:
231
232
233
234
235
236
237
238 break;
239 }
240
241 if (params->seq) {
242 switch (params->cipher) {
243 case WLAN_CIPHER_SUITE_WEP40:
244 case WLAN_CIPHER_SUITE_WEP104:
245
246 return -EINVAL;
247 case WLAN_CIPHER_SUITE_TKIP:
248 case WLAN_CIPHER_SUITE_CCMP:
249 case WLAN_CIPHER_SUITE_AES_CMAC:
250 if (params->seq_len != 6)
251 return -EINVAL;
252 break;
253 }
254 }
255
256 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
257 return -EINVAL;
258
259 return 0;
260}
261
262unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
263{
264 unsigned int hdrlen = 24;
265
266 if (ieee80211_is_data(fc)) {
267 if (ieee80211_has_a4(fc))
268 hdrlen = 30;
269 if (ieee80211_is_data_qos(fc)) {
270 hdrlen += IEEE80211_QOS_CTL_LEN;
271 if (ieee80211_has_order(fc))
272 hdrlen += IEEE80211_HT_CTL_LEN;
273 }
274 goto out;
275 }
276
277 if (ieee80211_is_ctl(fc)) {
278
279
280
281
282
283
284
285
286
287 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
288 hdrlen = 10;
289 else
290 hdrlen = 16;
291 }
292out:
293 return hdrlen;
294}
295EXPORT_SYMBOL(ieee80211_hdrlen);
296
297unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
298{
299 const struct ieee80211_hdr *hdr =
300 (const struct ieee80211_hdr *)skb->data;
301 unsigned int hdrlen;
302
303 if (unlikely(skb->len < 10))
304 return 0;
305 hdrlen = ieee80211_hdrlen(hdr->frame_control);
306 if (unlikely(hdrlen > skb->len))
307 return 0;
308 return hdrlen;
309}
310EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
311
312unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
313{
314 int ae = meshhdr->flags & MESH_FLAGS_AE;
315
316 switch (ae) {
317 default:
318 case 0:
319 return 6;
320 case MESH_FLAGS_AE_A4:
321 return 12;
322 case MESH_FLAGS_AE_A5_A6:
323 return 18;
324 }
325}
326EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
327
328int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
329 enum nl80211_iftype iftype)
330{
331 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
332 u16 hdrlen, ethertype;
333 u8 *payload;
334 u8 dst[ETH_ALEN];
335 u8 src[ETH_ALEN] __aligned(2);
336
337 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
338 return -1;
339
340 hdrlen = ieee80211_hdrlen(hdr->frame_control);
341
342
343
344
345
346
347
348
349
350
351 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
352 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
353
354 switch (hdr->frame_control &
355 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
356 case cpu_to_le16(IEEE80211_FCTL_TODS):
357 if (unlikely(iftype != NL80211_IFTYPE_AP &&
358 iftype != NL80211_IFTYPE_AP_VLAN &&
359 iftype != NL80211_IFTYPE_P2P_GO))
360 return -1;
361 break;
362 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
363 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
364 iftype != NL80211_IFTYPE_MESH_POINT &&
365 iftype != NL80211_IFTYPE_AP_VLAN &&
366 iftype != NL80211_IFTYPE_STATION))
367 return -1;
368 if (iftype == NL80211_IFTYPE_MESH_POINT) {
369 struct ieee80211s_hdr *meshdr =
370 (struct ieee80211s_hdr *) (skb->data + hdrlen);
371
372 if (!pskb_may_pull(skb, hdrlen + 1))
373 return -1;
374 if (meshdr->flags & MESH_FLAGS_AE_A4)
375 return -1;
376 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
377 skb_copy_bits(skb, hdrlen +
378 offsetof(struct ieee80211s_hdr, eaddr1),
379 dst, ETH_ALEN);
380 skb_copy_bits(skb, hdrlen +
381 offsetof(struct ieee80211s_hdr, eaddr2),
382 src, ETH_ALEN);
383 }
384 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
385 }
386 break;
387 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
388 if ((iftype != NL80211_IFTYPE_STATION &&
389 iftype != NL80211_IFTYPE_P2P_CLIENT &&
390 iftype != NL80211_IFTYPE_MESH_POINT) ||
391 (is_multicast_ether_addr(dst) &&
392 ether_addr_equal(src, addr)))
393 return -1;
394 if (iftype == NL80211_IFTYPE_MESH_POINT) {
395 struct ieee80211s_hdr *meshdr =
396 (struct ieee80211s_hdr *) (skb->data + hdrlen);
397
398 if (!pskb_may_pull(skb, hdrlen + 1))
399 return -1;
400 if (meshdr->flags & MESH_FLAGS_AE_A5_A6)
401 return -1;
402 if (meshdr->flags & MESH_FLAGS_AE_A4)
403 skb_copy_bits(skb, hdrlen +
404 offsetof(struct ieee80211s_hdr, eaddr1),
405 src, ETH_ALEN);
406 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
407 }
408 break;
409 case cpu_to_le16(0):
410 if (iftype != NL80211_IFTYPE_ADHOC &&
411 iftype != NL80211_IFTYPE_STATION)
412 return -1;
413 break;
414 }
415
416 if (!pskb_may_pull(skb, hdrlen + 8))
417 return -1;
418
419 payload = skb->data + hdrlen;
420 ethertype = (payload[6] << 8) | payload[7];
421
422 if (likely((ether_addr_equal(payload, rfc1042_header) &&
423 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
424 ether_addr_equal(payload, bridge_tunnel_header))) {
425
426
427 skb_pull(skb, hdrlen + 6);
428 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
429 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
430 } else {
431 struct ethhdr *ehdr;
432 __be16 len;
433
434 skb_pull(skb, hdrlen);
435 len = htons(skb->len);
436 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
437 memcpy(ehdr->h_dest, dst, ETH_ALEN);
438 memcpy(ehdr->h_source, src, ETH_ALEN);
439 ehdr->h_proto = len;
440 }
441 return 0;
442}
443EXPORT_SYMBOL(ieee80211_data_to_8023);
444
445int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
446 enum nl80211_iftype iftype, u8 *bssid, bool qos)
447{
448 struct ieee80211_hdr hdr;
449 u16 hdrlen, ethertype;
450 __le16 fc;
451 const u8 *encaps_data;
452 int encaps_len, skip_header_bytes;
453 int nh_pos, h_pos;
454 int head_need;
455
456 if (unlikely(skb->len < ETH_HLEN))
457 return -EINVAL;
458
459 nh_pos = skb_network_header(skb) - skb->data;
460 h_pos = skb_transport_header(skb) - skb->data;
461
462
463
464 ethertype = (skb->data[12] << 8) | skb->data[13];
465 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
466
467 switch (iftype) {
468 case NL80211_IFTYPE_AP:
469 case NL80211_IFTYPE_AP_VLAN:
470 case NL80211_IFTYPE_P2P_GO:
471 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
472
473 memcpy(hdr.addr1, skb->data, ETH_ALEN);
474 memcpy(hdr.addr2, addr, ETH_ALEN);
475 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
476 hdrlen = 24;
477 break;
478 case NL80211_IFTYPE_STATION:
479 case NL80211_IFTYPE_P2P_CLIENT:
480 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
481
482 memcpy(hdr.addr1, bssid, ETH_ALEN);
483 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
484 memcpy(hdr.addr3, skb->data, ETH_ALEN);
485 hdrlen = 24;
486 break;
487 case NL80211_IFTYPE_ADHOC:
488
489 memcpy(hdr.addr1, skb->data, ETH_ALEN);
490 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
491 memcpy(hdr.addr3, bssid, ETH_ALEN);
492 hdrlen = 24;
493 break;
494 default:
495 return -EOPNOTSUPP;
496 }
497
498 if (qos) {
499 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
500 hdrlen += 2;
501 }
502
503 hdr.frame_control = fc;
504 hdr.duration_id = 0;
505 hdr.seq_ctrl = 0;
506
507 skip_header_bytes = ETH_HLEN;
508 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
509 encaps_data = bridge_tunnel_header;
510 encaps_len = sizeof(bridge_tunnel_header);
511 skip_header_bytes -= 2;
512 } else if (ethertype > 0x600) {
513 encaps_data = rfc1042_header;
514 encaps_len = sizeof(rfc1042_header);
515 skip_header_bytes -= 2;
516 } else {
517 encaps_data = NULL;
518 encaps_len = 0;
519 }
520
521 skb_pull(skb, skip_header_bytes);
522 nh_pos -= skip_header_bytes;
523 h_pos -= skip_header_bytes;
524
525 head_need = hdrlen + encaps_len - skb_headroom(skb);
526
527 if (head_need > 0 || skb_cloned(skb)) {
528 head_need = max(head_need, 0);
529 if (head_need)
530 skb_orphan(skb);
531
532 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
533 return -ENOMEM;
534
535 skb->truesize += head_need;
536 }
537
538 if (encaps_data) {
539 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
540 nh_pos += encaps_len;
541 h_pos += encaps_len;
542 }
543
544 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
545
546 nh_pos += hdrlen;
547 h_pos += hdrlen;
548
549
550
551
552 skb_set_mac_header(skb, 0);
553 skb_set_network_header(skb, nh_pos);
554 skb_set_transport_header(skb, h_pos);
555
556 return 0;
557}
558EXPORT_SYMBOL(ieee80211_data_from_8023);
559
560
561void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
562 const u8 *addr, enum nl80211_iftype iftype,
563 const unsigned int extra_headroom,
564 bool has_80211_header)
565{
566 struct sk_buff *frame = NULL;
567 u16 ethertype;
568 u8 *payload;
569 const struct ethhdr *eth;
570 int remaining, err;
571 u8 dst[ETH_ALEN], src[ETH_ALEN];
572
573 if (has_80211_header) {
574 err = ieee80211_data_to_8023(skb, addr, iftype);
575 if (err)
576 goto out;
577
578
579 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
580 if (!eth)
581 goto out;
582 } else {
583 eth = (struct ethhdr *) skb->data;
584 }
585
586 while (skb != frame) {
587 u8 padding;
588 __be16 len = eth->h_proto;
589 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
590
591 remaining = skb->len;
592 memcpy(dst, eth->h_dest, ETH_ALEN);
593 memcpy(src, eth->h_source, ETH_ALEN);
594
595 padding = (4 - subframe_len) & 0x3;
596
597 if (subframe_len > remaining)
598 goto purge;
599
600 skb_pull(skb, sizeof(struct ethhdr));
601
602 if (remaining <= subframe_len + padding)
603 frame = skb;
604 else {
605 unsigned int hlen = ALIGN(extra_headroom, 4);
606
607
608
609
610 frame = dev_alloc_skb(hlen + subframe_len + 2);
611 if (!frame)
612 goto purge;
613
614 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
615 memcpy(skb_put(frame, ntohs(len)), skb->data,
616 ntohs(len));
617
618 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
619 padding);
620 if (!eth) {
621 dev_kfree_skb(frame);
622 goto purge;
623 }
624 }
625
626 skb_reset_network_header(frame);
627 frame->dev = skb->dev;
628 frame->priority = skb->priority;
629
630 payload = frame->data;
631 ethertype = (payload[6] << 8) | payload[7];
632
633 if (likely((ether_addr_equal(payload, rfc1042_header) &&
634 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
635 ether_addr_equal(payload, bridge_tunnel_header))) {
636
637
638 skb_pull(frame, 6);
639 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
640 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
641 } else {
642 memcpy(skb_push(frame, sizeof(__be16)), &len,
643 sizeof(__be16));
644 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
645 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
646 }
647 __skb_queue_tail(list, frame);
648 }
649
650 return;
651
652 purge:
653 __skb_queue_purge(list);
654 out:
655 dev_kfree_skb(skb);
656}
657EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
658
659
660unsigned int cfg80211_classify8021d(struct sk_buff *skb)
661{
662 unsigned int dscp;
663
664
665
666
667
668
669 if (skb->priority >= 256 && skb->priority <= 263)
670 return skb->priority - 256;
671
672 switch (skb->protocol) {
673 case htons(ETH_P_IP):
674 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
675 break;
676 case htons(ETH_P_IPV6):
677 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
678 break;
679 default:
680 return 0;
681 }
682
683 return dscp >> 5;
684}
685EXPORT_SYMBOL(cfg80211_classify8021d);
686
687const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
688{
689 u8 *end, *pos;
690
691 pos = bss->information_elements;
692 if (pos == NULL)
693 return NULL;
694 end = pos + bss->len_information_elements;
695
696 while (pos + 1 < end) {
697 if (pos + 2 + pos[1] > end)
698 break;
699 if (pos[0] == ie)
700 return pos;
701 pos += 2 + pos[1];
702 }
703
704 return NULL;
705}
706EXPORT_SYMBOL(ieee80211_bss_get_ie);
707
708void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
709{
710 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
711 struct net_device *dev = wdev->netdev;
712 int i;
713
714 if (!wdev->connect_keys)
715 return;
716
717 for (i = 0; i < 6; i++) {
718 if (!wdev->connect_keys->params[i].cipher)
719 continue;
720 if (rdev->ops->add_key(wdev->wiphy, dev, i, false, NULL,
721 &wdev->connect_keys->params[i])) {
722 netdev_err(dev, "failed to set key %d\n", i);
723 continue;
724 }
725 if (wdev->connect_keys->def == i)
726 if (rdev->ops->set_default_key(wdev->wiphy, dev,
727 i, true, true)) {
728 netdev_err(dev, "failed to set defkey %d\n", i);
729 continue;
730 }
731 if (wdev->connect_keys->defmgmt == i)
732 if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i))
733 netdev_err(dev, "failed to set mgtdef %d\n", i);
734 }
735
736 kfree(wdev->connect_keys);
737 wdev->connect_keys = NULL;
738}
739
740void cfg80211_process_wdev_events(struct wireless_dev *wdev)
741{
742 struct cfg80211_event *ev;
743 unsigned long flags;
744 const u8 *bssid = NULL;
745
746 spin_lock_irqsave(&wdev->event_lock, flags);
747 while (!list_empty(&wdev->event_list)) {
748 ev = list_first_entry(&wdev->event_list,
749 struct cfg80211_event, list);
750 list_del(&ev->list);
751 spin_unlock_irqrestore(&wdev->event_lock, flags);
752
753 wdev_lock(wdev);
754 switch (ev->type) {
755 case EVENT_CONNECT_RESULT:
756 if (!is_zero_ether_addr(ev->cr.bssid))
757 bssid = ev->cr.bssid;
758 __cfg80211_connect_result(
759 wdev->netdev, bssid,
760 ev->cr.req_ie, ev->cr.req_ie_len,
761 ev->cr.resp_ie, ev->cr.resp_ie_len,
762 ev->cr.status,
763 ev->cr.status == WLAN_STATUS_SUCCESS,
764 NULL);
765 break;
766 case EVENT_ROAMED:
767 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
768 ev->rm.req_ie_len, ev->rm.resp_ie,
769 ev->rm.resp_ie_len);
770 break;
771 case EVENT_DISCONNECTED:
772 __cfg80211_disconnected(wdev->netdev,
773 ev->dc.ie, ev->dc.ie_len,
774 ev->dc.reason, true);
775 break;
776 case EVENT_IBSS_JOINED:
777 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
778 break;
779 }
780 wdev_unlock(wdev);
781
782 kfree(ev);
783
784 spin_lock_irqsave(&wdev->event_lock, flags);
785 }
786 spin_unlock_irqrestore(&wdev->event_lock, flags);
787}
788
789void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
790{
791 struct wireless_dev *wdev;
792
793 ASSERT_RTNL();
794 ASSERT_RDEV_LOCK(rdev);
795
796 mutex_lock(&rdev->devlist_mtx);
797
798 list_for_each_entry(wdev, &rdev->wdev_list, list)
799 cfg80211_process_wdev_events(wdev);
800
801 mutex_unlock(&rdev->devlist_mtx);
802}
803
804int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
805 struct net_device *dev, enum nl80211_iftype ntype,
806 u32 *flags, struct vif_params *params)
807{
808 int err;
809 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
810
811 ASSERT_RDEV_LOCK(rdev);
812
813
814 if (otype == NL80211_IFTYPE_AP_VLAN)
815 return -EOPNOTSUPP;
816
817 if (!rdev->ops->change_virtual_intf ||
818 !(rdev->wiphy.interface_modes & (1 << ntype)))
819 return -EOPNOTSUPP;
820
821
822 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
823 (ntype == NL80211_IFTYPE_ADHOC ||
824 ntype == NL80211_IFTYPE_STATION ||
825 ntype == NL80211_IFTYPE_P2P_CLIENT))
826 return -EBUSY;
827
828 if (ntype != otype && netif_running(dev)) {
829 mutex_lock(&rdev->devlist_mtx);
830 err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr,
831 ntype);
832 mutex_unlock(&rdev->devlist_mtx);
833 if (err)
834 return err;
835
836 dev->ieee80211_ptr->use_4addr = false;
837 dev->ieee80211_ptr->mesh_id_up_len = 0;
838
839 switch (otype) {
840 case NL80211_IFTYPE_AP:
841 cfg80211_stop_ap(rdev, dev);
842 break;
843 case NL80211_IFTYPE_ADHOC:
844 cfg80211_leave_ibss(rdev, dev, false);
845 break;
846 case NL80211_IFTYPE_STATION:
847 case NL80211_IFTYPE_P2P_CLIENT:
848 cfg80211_disconnect(rdev, dev,
849 WLAN_REASON_DEAUTH_LEAVING, true);
850 break;
851 case NL80211_IFTYPE_MESH_POINT:
852
853 break;
854 default:
855 break;
856 }
857
858 cfg80211_process_rdev_events(rdev);
859 }
860
861 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
862 ntype, flags, params);
863
864 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
865
866 if (!err && params && params->use_4addr != -1)
867 dev->ieee80211_ptr->use_4addr = params->use_4addr;
868
869 if (!err) {
870 dev->priv_flags &= ~IFF_DONT_BRIDGE;
871 switch (ntype) {
872 case NL80211_IFTYPE_STATION:
873 if (dev->ieee80211_ptr->use_4addr)
874 break;
875
876 case NL80211_IFTYPE_P2P_CLIENT:
877 case NL80211_IFTYPE_ADHOC:
878 dev->priv_flags |= IFF_DONT_BRIDGE;
879 break;
880 case NL80211_IFTYPE_P2P_GO:
881 case NL80211_IFTYPE_AP:
882 case NL80211_IFTYPE_AP_VLAN:
883 case NL80211_IFTYPE_WDS:
884 case NL80211_IFTYPE_MESH_POINT:
885
886 break;
887 case NL80211_IFTYPE_MONITOR:
888
889 break;
890 case NL80211_IFTYPE_UNSPECIFIED:
891 case NUM_NL80211_IFTYPES:
892
893 break;
894 }
895 }
896
897 if (!err && ntype != otype && netif_running(dev)) {
898 cfg80211_update_iface_num(rdev, ntype, 1);
899 cfg80211_update_iface_num(rdev, otype, -1);
900 }
901
902 return err;
903}
904
905static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
906{
907 static const u32 __mcs2bitrate[] = {
908
909 [0] = 275,
910
911 [1] = 3850,
912 [2] = 7700,
913 [3] = 9625,
914 [4] = 11550,
915 [5] = 12512,
916 [6] = 15400,
917 [7] = 19250,
918 [8] = 23100,
919 [9] = 25025,
920 [10] = 30800,
921 [11] = 38500,
922 [12] = 46200,
923
924 [13] = 6930,
925 [14] = 8662,
926 [15] = 13860,
927 [16] = 17325,
928 [17] = 20790,
929 [18] = 27720,
930 [19] = 34650,
931 [20] = 41580,
932 [21] = 45045,
933 [22] = 51975,
934 [23] = 62370,
935 [24] = 67568,
936
937 [25] = 6260,
938 [26] = 8340,
939 [27] = 11120,
940 [28] = 12510,
941 [29] = 16680,
942 [30] = 22240,
943 [31] = 25030,
944 };
945
946 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
947 return 0;
948
949 return __mcs2bitrate[rate->mcs];
950}
951
952u32 cfg80211_calculate_bitrate(struct rate_info *rate)
953{
954 int modulation, streams, bitrate;
955
956 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
957 return rate->legacy;
958 if (rate->flags & RATE_INFO_FLAGS_60G)
959 return cfg80211_calculate_bitrate_60g(rate);
960
961
962 if (WARN_ON_ONCE(rate->mcs >= 32))
963 return 0;
964
965 modulation = rate->mcs & 7;
966 streams = (rate->mcs >> 3) + 1;
967
968 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
969 13500000 : 6500000;
970
971 if (modulation < 4)
972 bitrate *= (modulation + 1);
973 else if (modulation == 4)
974 bitrate *= (modulation + 2);
975 else
976 bitrate *= (modulation + 3);
977
978 bitrate *= streams;
979
980 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
981 bitrate = (bitrate / 9) * 10;
982
983
984 return (bitrate + 50000) / 100000;
985}
986EXPORT_SYMBOL(cfg80211_calculate_bitrate);
987
988int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
989 u32 beacon_int)
990{
991 struct wireless_dev *wdev;
992 int res = 0;
993
994 if (!beacon_int)
995 return -EINVAL;
996
997 mutex_lock(&rdev->devlist_mtx);
998
999 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1000 if (!wdev->beacon_interval)
1001 continue;
1002 if (wdev->beacon_interval != beacon_int) {
1003 res = -EINVAL;
1004 break;
1005 }
1006 }
1007
1008 mutex_unlock(&rdev->devlist_mtx);
1009
1010 return res;
1011}
1012
1013int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
1014 struct wireless_dev *wdev,
1015 enum nl80211_iftype iftype,
1016 struct ieee80211_channel *chan,
1017 enum cfg80211_chan_mode chanmode)
1018{
1019 struct wireless_dev *wdev_iter;
1020 u32 used_iftypes = BIT(iftype);
1021 int num[NUM_NL80211_IFTYPES];
1022 struct ieee80211_channel
1023 *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS];
1024 struct ieee80211_channel *ch;
1025 enum cfg80211_chan_mode chmode;
1026 int num_different_channels = 0;
1027 int total = 1;
1028 int i, j;
1029
1030 ASSERT_RTNL();
1031 lockdep_assert_held(&rdev->devlist_mtx);
1032
1033
1034 if (rdev->wiphy.software_iftypes & BIT(iftype))
1035 return 0;
1036
1037 memset(num, 0, sizeof(num));
1038 memset(used_channels, 0, sizeof(used_channels));
1039
1040 num[iftype] = 1;
1041
1042 switch (chanmode) {
1043 case CHAN_MODE_UNDEFINED:
1044 break;
1045 case CHAN_MODE_SHARED:
1046 WARN_ON(!chan);
1047 used_channels[0] = chan;
1048 num_different_channels++;
1049 break;
1050 case CHAN_MODE_EXCLUSIVE:
1051 num_different_channels++;
1052 break;
1053 }
1054
1055 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
1056 if (wdev_iter == wdev)
1057 continue;
1058 if (!netif_running(wdev_iter->netdev))
1059 continue;
1060
1061 if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
1062 continue;
1063
1064
1065
1066
1067
1068
1069
1070 mutex_lock_nested(&wdev_iter->mtx, 1);
1071 __acquire(wdev_iter->mtx);
1072 cfg80211_get_chan_state(wdev_iter, &ch, &chmode);
1073 wdev_unlock(wdev_iter);
1074
1075 switch (chmode) {
1076 case CHAN_MODE_UNDEFINED:
1077 break;
1078 case CHAN_MODE_SHARED:
1079 for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++)
1080 if (!used_channels[i] || used_channels[i] == ch)
1081 break;
1082
1083 if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS)
1084 return -EBUSY;
1085
1086 if (used_channels[i] == NULL) {
1087 used_channels[i] = ch;
1088 num_different_channels++;
1089 }
1090 break;
1091 case CHAN_MODE_EXCLUSIVE:
1092 num_different_channels++;
1093 break;
1094 }
1095
1096 num[wdev_iter->iftype]++;
1097 total++;
1098 used_iftypes |= BIT(wdev_iter->iftype);
1099 }
1100
1101 if (total == 1)
1102 return 0;
1103
1104 for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) {
1105 const struct ieee80211_iface_combination *c;
1106 struct ieee80211_iface_limit *limits;
1107 u32 all_iftypes = 0;
1108
1109 c = &rdev->wiphy.iface_combinations[i];
1110
1111 if (total > c->max_interfaces)
1112 continue;
1113 if (num_different_channels > c->num_different_channels)
1114 continue;
1115
1116 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1117 GFP_KERNEL);
1118 if (!limits)
1119 return -ENOMEM;
1120
1121 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1122 if (rdev->wiphy.software_iftypes & BIT(iftype))
1123 continue;
1124 for (j = 0; j < c->n_limits; j++) {
1125 all_iftypes |= limits[j].types;
1126 if (!(limits[j].types & BIT(iftype)))
1127 continue;
1128 if (limits[j].max < num[iftype])
1129 goto cont;
1130 limits[j].max -= num[iftype];
1131 }
1132 }
1133
1134
1135
1136
1137
1138
1139
1140 if ((all_iftypes & used_iftypes) != used_iftypes)
1141 goto cont;
1142
1143
1144
1145
1146
1147 kfree(limits);
1148 return 0;
1149 cont:
1150 kfree(limits);
1151 }
1152
1153 return -EBUSY;
1154}
1155
1156int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1157 const u8 *rates, unsigned int n_rates,
1158 u32 *mask)
1159{
1160 int i, j;
1161
1162 if (!sband)
1163 return -EINVAL;
1164
1165 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1166 return -EINVAL;
1167
1168 *mask = 0;
1169
1170 for (i = 0; i < n_rates; i++) {
1171 int rate = (rates[i] & 0x7f) * 5;
1172 bool found = false;
1173
1174 for (j = 0; j < sband->n_bitrates; j++) {
1175 if (sband->bitrates[j].bitrate == rate) {
1176 found = true;
1177 *mask |= BIT(j);
1178 break;
1179 }
1180 }
1181 if (!found)
1182 return -EINVAL;
1183 }
1184
1185
1186
1187
1188
1189
1190
1191 return 0;
1192}
1193
1194
1195
1196const unsigned char rfc1042_header[] __aligned(2) =
1197 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1198EXPORT_SYMBOL(rfc1042_header);
1199
1200
1201const unsigned char bridge_tunnel_header[] __aligned(2) =
1202 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1203EXPORT_SYMBOL(bridge_tunnel_header);
1204
