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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
312static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
313{
314 int ae = meshhdr->flags & MESH_FLAGS_AE;
315
316 switch (ae) {
317 case 0:
318 return 6;
319 case MESH_FLAGS_AE_A4:
320 return 12;
321 case MESH_FLAGS_AE_A5_A6:
322 return 18;
323 case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6):
324 return 24;
325 default:
326 return 6;
327 }
328}
329
330int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
331 enum nl80211_iftype iftype)
332{
333 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
334 u16 hdrlen, ethertype;
335 u8 *payload;
336 u8 dst[ETH_ALEN];
337 u8 src[ETH_ALEN] __aligned(2);
338
339 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
340 return -1;
341
342 hdrlen = ieee80211_hdrlen(hdr->frame_control);
343
344
345
346
347
348
349
350
351
352
353 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
354 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
355
356 switch (hdr->frame_control &
357 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
358 case cpu_to_le16(IEEE80211_FCTL_TODS):
359 if (unlikely(iftype != NL80211_IFTYPE_AP &&
360 iftype != NL80211_IFTYPE_AP_VLAN &&
361 iftype != NL80211_IFTYPE_P2P_GO))
362 return -1;
363 break;
364 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
365 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
366 iftype != NL80211_IFTYPE_MESH_POINT &&
367 iftype != NL80211_IFTYPE_AP_VLAN &&
368 iftype != NL80211_IFTYPE_STATION))
369 return -1;
370 if (iftype == NL80211_IFTYPE_MESH_POINT) {
371 struct ieee80211s_hdr *meshdr =
372 (struct ieee80211s_hdr *) (skb->data + hdrlen);
373
374 if (!pskb_may_pull(skb, hdrlen + 1))
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_A4)
401 skb_copy_bits(skb, hdrlen +
402 offsetof(struct ieee80211s_hdr, eaddr1),
403 src, ETH_ALEN);
404 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
405 }
406 break;
407 case cpu_to_le16(0):
408 if (iftype != NL80211_IFTYPE_ADHOC &&
409 iftype != NL80211_IFTYPE_STATION)
410 return -1;
411 break;
412 }
413
414 if (!pskb_may_pull(skb, hdrlen + 8))
415 return -1;
416
417 payload = skb->data + hdrlen;
418 ethertype = (payload[6] << 8) | payload[7];
419
420 if (likely((ether_addr_equal(payload, rfc1042_header) &&
421 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
422 ether_addr_equal(payload, bridge_tunnel_header))) {
423
424
425 skb_pull(skb, hdrlen + 6);
426 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
427 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
428 } else {
429 struct ethhdr *ehdr;
430 __be16 len;
431
432 skb_pull(skb, hdrlen);
433 len = htons(skb->len);
434 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
435 memcpy(ehdr->h_dest, dst, ETH_ALEN);
436 memcpy(ehdr->h_source, src, ETH_ALEN);
437 ehdr->h_proto = len;
438 }
439 return 0;
440}
441EXPORT_SYMBOL(ieee80211_data_to_8023);
442
443int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
444 enum nl80211_iftype iftype, u8 *bssid, bool qos)
445{
446 struct ieee80211_hdr hdr;
447 u16 hdrlen, ethertype;
448 __le16 fc;
449 const u8 *encaps_data;
450 int encaps_len, skip_header_bytes;
451 int nh_pos, h_pos;
452 int head_need;
453
454 if (unlikely(skb->len < ETH_HLEN))
455 return -EINVAL;
456
457 nh_pos = skb_network_header(skb) - skb->data;
458 h_pos = skb_transport_header(skb) - skb->data;
459
460
461
462 ethertype = (skb->data[12] << 8) | skb->data[13];
463 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
464
465 switch (iftype) {
466 case NL80211_IFTYPE_AP:
467 case NL80211_IFTYPE_AP_VLAN:
468 case NL80211_IFTYPE_P2P_GO:
469 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
470
471 memcpy(hdr.addr1, skb->data, ETH_ALEN);
472 memcpy(hdr.addr2, addr, ETH_ALEN);
473 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
474 hdrlen = 24;
475 break;
476 case NL80211_IFTYPE_STATION:
477 case NL80211_IFTYPE_P2P_CLIENT:
478 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
479
480 memcpy(hdr.addr1, bssid, ETH_ALEN);
481 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
482 memcpy(hdr.addr3, skb->data, ETH_ALEN);
483 hdrlen = 24;
484 break;
485 case NL80211_IFTYPE_ADHOC:
486
487 memcpy(hdr.addr1, skb->data, ETH_ALEN);
488 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
489 memcpy(hdr.addr3, bssid, ETH_ALEN);
490 hdrlen = 24;
491 break;
492 default:
493 return -EOPNOTSUPP;
494 }
495
496 if (qos) {
497 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
498 hdrlen += 2;
499 }
500
501 hdr.frame_control = fc;
502 hdr.duration_id = 0;
503 hdr.seq_ctrl = 0;
504
505 skip_header_bytes = ETH_HLEN;
506 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
507 encaps_data = bridge_tunnel_header;
508 encaps_len = sizeof(bridge_tunnel_header);
509 skip_header_bytes -= 2;
510 } else if (ethertype > 0x600) {
511 encaps_data = rfc1042_header;
512 encaps_len = sizeof(rfc1042_header);
513 skip_header_bytes -= 2;
514 } else {
515 encaps_data = NULL;
516 encaps_len = 0;
517 }
518
519 skb_pull(skb, skip_header_bytes);
520 nh_pos -= skip_header_bytes;
521 h_pos -= skip_header_bytes;
522
523 head_need = hdrlen + encaps_len - skb_headroom(skb);
524
525 if (head_need > 0 || skb_cloned(skb)) {
526 head_need = max(head_need, 0);
527 if (head_need)
528 skb_orphan(skb);
529
530 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
531 return -ENOMEM;
532
533 skb->truesize += head_need;
534 }
535
536 if (encaps_data) {
537 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
538 nh_pos += encaps_len;
539 h_pos += encaps_len;
540 }
541
542 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
543
544 nh_pos += hdrlen;
545 h_pos += hdrlen;
546
547
548
549
550 skb_set_mac_header(skb, 0);
551 skb_set_network_header(skb, nh_pos);
552 skb_set_transport_header(skb, h_pos);
553
554 return 0;
555}
556EXPORT_SYMBOL(ieee80211_data_from_8023);
557
558
559void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
560 const u8 *addr, enum nl80211_iftype iftype,
561 const unsigned int extra_headroom,
562 bool has_80211_header)
563{
564 struct sk_buff *frame = NULL;
565 u16 ethertype;
566 u8 *payload;
567 const struct ethhdr *eth;
568 int remaining, err;
569 u8 dst[ETH_ALEN], src[ETH_ALEN];
570
571 if (has_80211_header) {
572 err = ieee80211_data_to_8023(skb, addr, iftype);
573 if (err)
574 goto out;
575
576
577 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
578 if (!eth)
579 goto out;
580 } else {
581 eth = (struct ethhdr *) skb->data;
582 }
583
584 while (skb != frame) {
585 u8 padding;
586 __be16 len = eth->h_proto;
587 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
588
589 remaining = skb->len;
590 memcpy(dst, eth->h_dest, ETH_ALEN);
591 memcpy(src, eth->h_source, ETH_ALEN);
592
593 padding = (4 - subframe_len) & 0x3;
594
595 if (subframe_len > remaining)
596 goto purge;
597
598 skb_pull(skb, sizeof(struct ethhdr));
599
600 if (remaining <= subframe_len + padding)
601 frame = skb;
602 else {
603 unsigned int hlen = ALIGN(extra_headroom, 4);
604
605
606
607
608 frame = dev_alloc_skb(hlen + subframe_len + 2);
609 if (!frame)
610 goto purge;
611
612 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
613 memcpy(skb_put(frame, ntohs(len)), skb->data,
614 ntohs(len));
615
616 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
617 padding);
618 if (!eth) {
619 dev_kfree_skb(frame);
620 goto purge;
621 }
622 }
623
624 skb_reset_network_header(frame);
625 frame->dev = skb->dev;
626 frame->priority = skb->priority;
627
628 payload = frame->data;
629 ethertype = (payload[6] << 8) | payload[7];
630
631 if (likely((ether_addr_equal(payload, rfc1042_header) &&
632 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
633 ether_addr_equal(payload, bridge_tunnel_header))) {
634
635
636 skb_pull(frame, 6);
637 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
638 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
639 } else {
640 memcpy(skb_push(frame, sizeof(__be16)), &len,
641 sizeof(__be16));
642 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
643 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
644 }
645 __skb_queue_tail(list, frame);
646 }
647
648 return;
649
650 purge:
651 __skb_queue_purge(list);
652 out:
653 dev_kfree_skb(skb);
654}
655EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
656
657
658unsigned int cfg80211_classify8021d(struct sk_buff *skb)
659{
660 unsigned int dscp;
661
662
663
664
665
666
667 if (skb->priority >= 256 && skb->priority <= 263)
668 return skb->priority - 256;
669
670 switch (skb->protocol) {
671 case htons(ETH_P_IP):
672 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
673 break;
674 case htons(ETH_P_IPV6):
675 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
676 break;
677 default:
678 return 0;
679 }
680
681 return dscp >> 5;
682}
683EXPORT_SYMBOL(cfg80211_classify8021d);
684
685const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
686{
687 u8 *end, *pos;
688
689 pos = bss->information_elements;
690 if (pos == NULL)
691 return NULL;
692 end = pos + bss->len_information_elements;
693
694 while (pos + 1 < end) {
695 if (pos + 2 + pos[1] > end)
696 break;
697 if (pos[0] == ie)
698 return pos;
699 pos += 2 + pos[1];
700 }
701
702 return NULL;
703}
704EXPORT_SYMBOL(ieee80211_bss_get_ie);
705
706void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
707{
708 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
709 struct net_device *dev = wdev->netdev;
710 int i;
711
712 if (!wdev->connect_keys)
713 return;
714
715 for (i = 0; i < 6; i++) {
716 if (!wdev->connect_keys->params[i].cipher)
717 continue;
718 if (rdev->ops->add_key(wdev->wiphy, dev, i, false, NULL,
719 &wdev->connect_keys->params[i])) {
720 netdev_err(dev, "failed to set key %d\n", i);
721 continue;
722 }
723 if (wdev->connect_keys->def == i)
724 if (rdev->ops->set_default_key(wdev->wiphy, dev,
725 i, true, true)) {
726 netdev_err(dev, "failed to set defkey %d\n", i);
727 continue;
728 }
729 if (wdev->connect_keys->defmgmt == i)
730 if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i))
731 netdev_err(dev, "failed to set mgtdef %d\n", i);
732 }
733
734 kfree(wdev->connect_keys);
735 wdev->connect_keys = NULL;
736}
737
738void cfg80211_process_wdev_events(struct wireless_dev *wdev)
739{
740 struct cfg80211_event *ev;
741 unsigned long flags;
742 const u8 *bssid = NULL;
743
744 spin_lock_irqsave(&wdev->event_lock, flags);
745 while (!list_empty(&wdev->event_list)) {
746 ev = list_first_entry(&wdev->event_list,
747 struct cfg80211_event, list);
748 list_del(&ev->list);
749 spin_unlock_irqrestore(&wdev->event_lock, flags);
750
751 wdev_lock(wdev);
752 switch (ev->type) {
753 case EVENT_CONNECT_RESULT:
754 if (!is_zero_ether_addr(ev->cr.bssid))
755 bssid = ev->cr.bssid;
756 __cfg80211_connect_result(
757 wdev->netdev, bssid,
758 ev->cr.req_ie, ev->cr.req_ie_len,
759 ev->cr.resp_ie, ev->cr.resp_ie_len,
760 ev->cr.status,
761 ev->cr.status == WLAN_STATUS_SUCCESS,
762 NULL);
763 break;
764 case EVENT_ROAMED:
765 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
766 ev->rm.req_ie_len, ev->rm.resp_ie,
767 ev->rm.resp_ie_len);
768 break;
769 case EVENT_DISCONNECTED:
770 __cfg80211_disconnected(wdev->netdev,
771 ev->dc.ie, ev->dc.ie_len,
772 ev->dc.reason, true);
773 break;
774 case EVENT_IBSS_JOINED:
775 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
776 break;
777 }
778 wdev_unlock(wdev);
779
780 kfree(ev);
781
782 spin_lock_irqsave(&wdev->event_lock, flags);
783 }
784 spin_unlock_irqrestore(&wdev->event_lock, flags);
785}
786
787void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
788{
789 struct wireless_dev *wdev;
790
791 ASSERT_RTNL();
792 ASSERT_RDEV_LOCK(rdev);
793
794 mutex_lock(&rdev->devlist_mtx);
795
796 list_for_each_entry(wdev, &rdev->wdev_list, list)
797 cfg80211_process_wdev_events(wdev);
798
799 mutex_unlock(&rdev->devlist_mtx);
800}
801
802int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
803 struct net_device *dev, enum nl80211_iftype ntype,
804 u32 *flags, struct vif_params *params)
805{
806 int err;
807 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
808
809 ASSERT_RDEV_LOCK(rdev);
810
811
812 if (otype == NL80211_IFTYPE_AP_VLAN)
813 return -EOPNOTSUPP;
814
815 if (!rdev->ops->change_virtual_intf ||
816 !(rdev->wiphy.interface_modes & (1 << ntype)))
817 return -EOPNOTSUPP;
818
819
820 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
821 (ntype == NL80211_IFTYPE_ADHOC ||
822 ntype == NL80211_IFTYPE_STATION ||
823 ntype == NL80211_IFTYPE_P2P_CLIENT))
824 return -EBUSY;
825
826 if (ntype != otype && netif_running(dev)) {
827 mutex_lock(&rdev->devlist_mtx);
828 err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr,
829 ntype);
830 mutex_unlock(&rdev->devlist_mtx);
831 if (err)
832 return err;
833
834 dev->ieee80211_ptr->use_4addr = false;
835 dev->ieee80211_ptr->mesh_id_up_len = 0;
836
837 switch (otype) {
838 case NL80211_IFTYPE_AP:
839 cfg80211_stop_ap(rdev, dev);
840 break;
841 case NL80211_IFTYPE_ADHOC:
842 cfg80211_leave_ibss(rdev, dev, false);
843 break;
844 case NL80211_IFTYPE_STATION:
845 case NL80211_IFTYPE_P2P_CLIENT:
846 cfg80211_disconnect(rdev, dev,
847 WLAN_REASON_DEAUTH_LEAVING, true);
848 break;
849 case NL80211_IFTYPE_MESH_POINT:
850
851 break;
852 default:
853 break;
854 }
855
856 cfg80211_process_rdev_events(rdev);
857 }
858
859 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
860 ntype, flags, params);
861
862 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
863
864 if (!err && params && params->use_4addr != -1)
865 dev->ieee80211_ptr->use_4addr = params->use_4addr;
866
867 if (!err) {
868 dev->priv_flags &= ~IFF_DONT_BRIDGE;
869 switch (ntype) {
870 case NL80211_IFTYPE_STATION:
871 if (dev->ieee80211_ptr->use_4addr)
872 break;
873
874 case NL80211_IFTYPE_P2P_CLIENT:
875 case NL80211_IFTYPE_ADHOC:
876 dev->priv_flags |= IFF_DONT_BRIDGE;
877 break;
878 case NL80211_IFTYPE_P2P_GO:
879 case NL80211_IFTYPE_AP:
880 case NL80211_IFTYPE_AP_VLAN:
881 case NL80211_IFTYPE_WDS:
882 case NL80211_IFTYPE_MESH_POINT:
883
884 break;
885 case NL80211_IFTYPE_MONITOR:
886
887 break;
888 case NL80211_IFTYPE_UNSPECIFIED:
889 case NUM_NL80211_IFTYPES:
890
891 break;
892 }
893 }
894
895 if (!err && ntype != otype && netif_running(dev)) {
896 cfg80211_update_iface_num(rdev, ntype, 1);
897 cfg80211_update_iface_num(rdev, otype, -1);
898 }
899
900 return err;
901}
902
903static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
904{
905 static const u32 __mcs2bitrate[] = {
906
907 [0] = 275,
908
909 [1] = 3850,
910 [2] = 7700,
911 [3] = 9625,
912 [4] = 11550,
913 [5] = 12512,
914 [6] = 15400,
915 [7] = 19250,
916 [8] = 23100,
917 [9] = 25025,
918 [10] = 30800,
919 [11] = 38500,
920 [12] = 46200,
921
922 [13] = 6930,
923 [14] = 8662,
924 [15] = 13860,
925 [16] = 17325,
926 [17] = 20790,
927 [18] = 27720,
928 [19] = 34650,
929 [20] = 41580,
930 [21] = 45045,
931 [22] = 51975,
932 [23] = 62370,
933 [24] = 67568,
934
935 [25] = 6260,
936 [26] = 8340,
937 [27] = 11120,
938 [28] = 12510,
939 [29] = 16680,
940 [30] = 22240,
941 [31] = 25030,
942 };
943
944 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
945 return 0;
946
947 return __mcs2bitrate[rate->mcs];
948}
949
950u32 cfg80211_calculate_bitrate(struct rate_info *rate)
951{
952 int modulation, streams, bitrate;
953
954 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
955 return rate->legacy;
956 if (rate->flags & RATE_INFO_FLAGS_60G)
957 return cfg80211_calculate_bitrate_60g(rate);
958
959
960 if (WARN_ON_ONCE(rate->mcs >= 32))
961 return 0;
962
963 modulation = rate->mcs & 7;
964 streams = (rate->mcs >> 3) + 1;
965
966 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
967 13500000 : 6500000;
968
969 if (modulation < 4)
970 bitrate *= (modulation + 1);
971 else if (modulation == 4)
972 bitrate *= (modulation + 2);
973 else
974 bitrate *= (modulation + 3);
975
976 bitrate *= streams;
977
978 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
979 bitrate = (bitrate / 9) * 10;
980
981
982 return (bitrate + 50000) / 100000;
983}
984EXPORT_SYMBOL(cfg80211_calculate_bitrate);
985
986int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
987 u32 beacon_int)
988{
989 struct wireless_dev *wdev;
990 int res = 0;
991
992 if (!beacon_int)
993 return -EINVAL;
994
995 mutex_lock(&rdev->devlist_mtx);
996
997 list_for_each_entry(wdev, &rdev->wdev_list, list) {
998 if (!wdev->beacon_interval)
999 continue;
1000 if (wdev->beacon_interval != beacon_int) {
1001 res = -EINVAL;
1002 break;
1003 }
1004 }
1005
1006 mutex_unlock(&rdev->devlist_mtx);
1007
1008 return res;
1009}
1010
1011int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
1012 struct wireless_dev *wdev,
1013 enum nl80211_iftype iftype,
1014 struct ieee80211_channel *chan,
1015 enum cfg80211_chan_mode chanmode)
1016{
1017 struct wireless_dev *wdev_iter;
1018 u32 used_iftypes = BIT(iftype);
1019 int num[NUM_NL80211_IFTYPES];
1020 struct ieee80211_channel
1021 *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS];
1022 struct ieee80211_channel *ch;
1023 enum cfg80211_chan_mode chmode;
1024 int num_different_channels = 0;
1025 int total = 1;
1026 int i, j;
1027
1028 ASSERT_RTNL();
1029 lockdep_assert_held(&rdev->devlist_mtx);
1030
1031
1032 if (rdev->wiphy.software_iftypes & BIT(iftype))
1033 return 0;
1034
1035 memset(num, 0, sizeof(num));
1036 memset(used_channels, 0, sizeof(used_channels));
1037
1038 num[iftype] = 1;
1039
1040 switch (chanmode) {
1041 case CHAN_MODE_UNDEFINED:
1042 break;
1043 case CHAN_MODE_SHARED:
1044 WARN_ON(!chan);
1045 used_channels[0] = chan;
1046 num_different_channels++;
1047 break;
1048 case CHAN_MODE_EXCLUSIVE:
1049 num_different_channels++;
1050 break;
1051 }
1052
1053 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
1054 if (wdev_iter == wdev)
1055 continue;
1056 if (!netif_running(wdev_iter->netdev))
1057 continue;
1058
1059 if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
1060 continue;
1061
1062
1063
1064
1065
1066
1067
1068 mutex_lock_nested(&wdev_iter->mtx, 1);
1069 __acquire(wdev_iter->mtx);
1070 cfg80211_get_chan_state(wdev_iter, &ch, &chmode);
1071 wdev_unlock(wdev_iter);
1072
1073 switch (chmode) {
1074 case CHAN_MODE_UNDEFINED:
1075 break;
1076 case CHAN_MODE_SHARED:
1077 for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++)
1078 if (!used_channels[i] || used_channels[i] == ch)
1079 break;
1080
1081 if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS)
1082 return -EBUSY;
1083
1084 if (used_channels[i] == NULL) {
1085 used_channels[i] = ch;
1086 num_different_channels++;
1087 }
1088 break;
1089 case CHAN_MODE_EXCLUSIVE:
1090 num_different_channels++;
1091 break;
1092 }
1093
1094 num[wdev_iter->iftype]++;
1095 total++;
1096 used_iftypes |= BIT(wdev_iter->iftype);
1097 }
1098
1099 if (total == 1)
1100 return 0;
1101
1102 for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) {
1103 const struct ieee80211_iface_combination *c;
1104 struct ieee80211_iface_limit *limits;
1105 u32 all_iftypes = 0;
1106
1107 c = &rdev->wiphy.iface_combinations[i];
1108
1109 if (total > c->max_interfaces)
1110 continue;
1111 if (num_different_channels > c->num_different_channels)
1112 continue;
1113
1114 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1115 GFP_KERNEL);
1116 if (!limits)
1117 return -ENOMEM;
1118
1119 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1120 if (rdev->wiphy.software_iftypes & BIT(iftype))
1121 continue;
1122 for (j = 0; j < c->n_limits; j++) {
1123 all_iftypes |= limits[j].types;
1124 if (!(limits[j].types & BIT(iftype)))
1125 continue;
1126 if (limits[j].max < num[iftype])
1127 goto cont;
1128 limits[j].max -= num[iftype];
1129 }
1130 }
1131
1132
1133
1134
1135
1136
1137
1138 if ((all_iftypes & used_iftypes) != used_iftypes)
1139 goto cont;
1140
1141
1142
1143
1144
1145 kfree(limits);
1146 return 0;
1147 cont:
1148 kfree(limits);
1149 }
1150
1151 return -EBUSY;
1152}
1153
1154int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1155 const u8 *rates, unsigned int n_rates,
1156 u32 *mask)
1157{
1158 int i, j;
1159
1160 if (!sband)
1161 return -EINVAL;
1162
1163 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1164 return -EINVAL;
1165
1166 *mask = 0;
1167
1168 for (i = 0; i < n_rates; i++) {
1169 int rate = (rates[i] & 0x7f) * 5;
1170 bool found = false;
1171
1172 for (j = 0; j < sband->n_bitrates; j++) {
1173 if (sband->bitrates[j].bitrate == rate) {
1174 found = true;
1175 *mask |= BIT(j);
1176 break;
1177 }
1178 }
1179 if (!found)
1180 return -EINVAL;
1181 }
1182
1183
1184
1185
1186
1187
1188
1189 return 0;
1190}
1191
1192
1193
1194const unsigned char rfc1042_header[] __aligned(2) =
1195 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1196EXPORT_SYMBOL(rfc1042_header);
1197
1198
1199const unsigned char bridge_tunnel_header[] __aligned(2) =
1200 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1201EXPORT_SYMBOL(bridge_tunnel_header);
1202
