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b43: N-PHY: fix value written on 2055 radio setup
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / wireless / util.c
CommitLineData
8318d78a
JB		 1/*
2 * Wireless utility functions
3 *
d3236553 4 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
8318d78a 5 */
d3236553 6#include <linux/bitops.h>
e31a16d6 7#include <linux/etherdevice.h>
d3236553 8#include <net/cfg80211.h>
e31a16d6 9#include <net/ip.h>
8318d78a
JB		 10#include "core.h"
11
bd815252
JB		 12struct ieee80211_rate *
13ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
881d948c 14 u32 basic_rates, int bitrate)
bd815252
JB		 15{
16 struct ieee80211_rate *result = &sband->bitrates[0];
17 int i;
18
19 for (i = 0; i < sband->n_bitrates; i++) {
20 if (!(basic_rates & BIT(i)))
21 continue;
22 if (sband->bitrates[i].bitrate > bitrate)
23 continue;
24 result = &sband->bitrates[i];
25 }
26
27 return result;
28}
29EXPORT_SYMBOL(ieee80211_get_response_rate);
30
8318d78a
JB		 31int ieee80211_channel_to_frequency(int chan)
32{
33 if (chan < 14)
34 return 2407 + chan * 5;
35
36 if (chan == 14)
37 return 2484;
38
39 /* FIXME: 802.11j 17.3.8.3.2 */
40 return (chan + 1000) * 5;
41}
42EXPORT_SYMBOL(ieee80211_channel_to_frequency);
43
44int ieee80211_frequency_to_channel(int freq)
45{
46 if (freq == 2484)
47 return 14;
48
49 if (freq < 2484)
50 return (freq - 2407) / 5;
51
52 /* FIXME: 802.11j 17.3.8.3.2 */
53 return freq/5 - 1000;
54}
55EXPORT_SYMBOL(ieee80211_frequency_to_channel);
56
6c507cd0
JB		 57struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
58 int freq)
906c730a
JB		 59{
60 enum ieee80211_band band;
61 struct ieee80211_supported_band *sband;
62 int i;
63
64 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
65 sband = wiphy->bands[band];
66
67 if (!sband)
68 continue;
69
70 for (i = 0; i < sband->n_channels; i++) {
71 if (sband->channels[i].center_freq == freq)
72 return &sband->channels[i];
73 }
74 }
75
76 return NULL;
77}
6c507cd0 78EXPORT_SYMBOL(__ieee80211_get_channel);
906c730a 79
8318d78a
JB		 80static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
81 enum ieee80211_band band)
82{
83 int i, want;
84
85 switch (band) {
86 case IEEE80211_BAND_5GHZ:
87 want = 3;
88 for (i = 0; i < sband->n_bitrates; i++) {
89 if (sband->bitrates[i].bitrate == 60 ||
90 sband->bitrates[i].bitrate == 120 ||
91 sband->bitrates[i].bitrate == 240) {
92 sband->bitrates[i].flags |=
93 IEEE80211_RATE_MANDATORY_A;
94 want--;
95 }
96 }
97 WARN_ON(want);
98 break;
99 case IEEE80211_BAND_2GHZ:
100 want = 7;
101 for (i = 0; i < sband->n_bitrates; i++) {
102 if (sband->bitrates[i].bitrate == 10) {
103 sband->bitrates[i].flags |=
104 IEEE80211_RATE_MANDATORY_B |
105 IEEE80211_RATE_MANDATORY_G;
106 want--;
107 }
108
109 if (sband->bitrates[i].bitrate == 20 ||
110 sband->bitrates[i].bitrate == 55 ||
111 sband->bitrates[i].bitrate == 110 ||
112 sband->bitrates[i].bitrate == 60 ||
113 sband->bitrates[i].bitrate == 120 ||
114 sband->bitrates[i].bitrate == 240) {
115 sband->bitrates[i].flags |=
116 IEEE80211_RATE_MANDATORY_G;
117 want--;
118 }
119
aac09fbf
JB		 120 if (sband->bitrates[i].bitrate != 10 &&
121 sband->bitrates[i].bitrate != 20 &&
122 sband->bitrates[i].bitrate != 55 &&
123 sband->bitrates[i].bitrate != 110)
8318d78a
JB		 124 sband->bitrates[i].flags |=
125 IEEE80211_RATE_ERP_G;
126 }
406f2388 127 WARN_ON(want != 0 && want != 3 && want != 6);
8318d78a
JB		 128 break;
129 case IEEE80211_NUM_BANDS:
130 WARN_ON(1);
131 break;
132 }
133}
134
135void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
136{
137 enum ieee80211_band band;
138
139 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
140 if (wiphy->bands[band])
141 set_mandatory_flags_band(wiphy->bands[band], band);
142}
08645126 143
fffd0934
JB		 144int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
145 struct key_params *params, int key_idx,
08645126
JB		 146 const u8 *mac_addr)
147{
fffd0934
JB		 148 int i;
149
08645126
JB		 150 if (key_idx > 5)
151 return -EINVAL;
152
153 /*
154 * Disallow pairwise keys with non-zero index unless it's WEP
155 * (because current deployments use pairwise WEP keys with
156 * non-zero indizes but 802.11i clearly specifies to use zero)
157 */
158 if (mac_addr && key_idx &&
159 params->cipher != WLAN_CIPHER_SUITE_WEP40 &&
160 params->cipher != WLAN_CIPHER_SUITE_WEP104)
161 return -EINVAL;
162
08645126
JB		 163 switch (params->cipher) {
164 case WLAN_CIPHER_SUITE_WEP40:
8fc0fee0 165 if (params->key_len != WLAN_KEY_LEN_WEP40)
08645126
JB		 166 return -EINVAL;
167 break;
168 case WLAN_CIPHER_SUITE_TKIP:
8fc0fee0 169 if (params->key_len != WLAN_KEY_LEN_TKIP)
08645126
JB		 170 return -EINVAL;
171 break;
172 case WLAN_CIPHER_SUITE_CCMP:
8fc0fee0 173 if (params->key_len != WLAN_KEY_LEN_CCMP)
08645126
JB		 174 return -EINVAL;
175 break;
176 case WLAN_CIPHER_SUITE_WEP104:
8fc0fee0 177 if (params->key_len != WLAN_KEY_LEN_WEP104)
08645126
JB		 178 return -EINVAL;
179 break;
180 case WLAN_CIPHER_SUITE_AES_CMAC:
8fc0fee0 181 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
08645126
JB		 182 return -EINVAL;
183 break;
184 default:
185 return -EINVAL;
186 }
187
9f26a952
JM		 188 if (params->seq) {
189 switch (params->cipher) {
190 case WLAN_CIPHER_SUITE_WEP40:
191 case WLAN_CIPHER_SUITE_WEP104:
192 /* These ciphers do not use key sequence */
193 return -EINVAL;
194 case WLAN_CIPHER_SUITE_TKIP:
195 case WLAN_CIPHER_SUITE_CCMP:
196 case WLAN_CIPHER_SUITE_AES_CMAC:
197 if (params->seq_len != 6)
198 return -EINVAL;
199 break;
200 }
201 }
202
fffd0934
JB		 203 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++)
204 if (params->cipher == rdev->wiphy.cipher_suites[i])
205 break;
206 if (i == rdev->wiphy.n_cipher_suites)
207 return -EINVAL;
208
08645126
JB		 209 return 0;
210}
e31a16d6
ZY		 211
212/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
213/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
214const unsigned char rfc1042_header[] __aligned(2) =
215 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
216EXPORT_SYMBOL(rfc1042_header);
217
218/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
219const unsigned char bridge_tunnel_header[] __aligned(2) =
220 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
221EXPORT_SYMBOL(bridge_tunnel_header);
222
223unsigned int ieee80211_hdrlen(__le16 fc)
224{
225 unsigned int hdrlen = 24;
226
227 if (ieee80211_is_data(fc)) {
228 if (ieee80211_has_a4(fc))
229 hdrlen = 30;
d0dd2de0 230 if (ieee80211_is_data_qos(fc)) {
e31a16d6 231 hdrlen += IEEE80211_QOS_CTL_LEN;
d0dd2de0
AT		 232 if (ieee80211_has_order(fc))
233 hdrlen += IEEE80211_HT_CTL_LEN;
234 }
e31a16d6
ZY		 235 goto out;
236 }
237
238 if (ieee80211_is_ctl(fc)) {
239 /*
240 * ACK and CTS are 10 bytes, all others 16. To see how
241 * to get this condition consider
242 * subtype mask: 0b0000000011110000 (0x00F0)
243 * ACK subtype: 0b0000000011010000 (0x00D0)
244 * CTS subtype: 0b0000000011000000 (0x00C0)
245 * bits that matter: ^^^ (0x00E0)
246 * value of those: 0b0000000011000000 (0x00C0)
247 */
248 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
249 hdrlen = 10;
250 else
251 hdrlen = 16;
252 }
253out:
254 return hdrlen;
255}
256EXPORT_SYMBOL(ieee80211_hdrlen);
257
258unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
259{
260 const struct ieee80211_hdr *hdr =
261 (const struct ieee80211_hdr *)skb->data;
262 unsigned int hdrlen;
263
264 if (unlikely(skb->len < 10))
265 return 0;
266 hdrlen = ieee80211_hdrlen(hdr->frame_control);
267 if (unlikely(hdrlen > skb->len))
268 return 0;
269 return hdrlen;
270}
271EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
272
60fd2b67 273static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
e31a16d6
ZY		 274{
275 int ae = meshhdr->flags & MESH_FLAGS_AE;
276 /* 7.1.3.5a.2 */
277 switch (ae) {
278 case 0:
279 return 6;
3c5772a5 280 case MESH_FLAGS_AE_A4:
e31a16d6 281 return 12;
3c5772a5 282 case MESH_FLAGS_AE_A5_A6:
e31a16d6 283 return 18;
3c5772a5 284 case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6):
e31a16d6
ZY		 285 return 24;
286 default:
287 return 6;
288 }
289}
290
eaf85ca7 291int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
e31a16d6
ZY		 292 enum nl80211_iftype iftype)
293{
294 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
295 u16 hdrlen, ethertype;
296 u8 *payload;
297 u8 dst[ETH_ALEN];
298 u8 src[ETH_ALEN] __aligned(2);
299
300 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
301 return -1;
302
303 hdrlen = ieee80211_hdrlen(hdr->frame_control);
304
305 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
306 * header
307 * IEEE 802.11 address fields:
308 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
309 * 0 0 DA SA BSSID n/a
310 * 0 1 DA BSSID SA n/a
311 * 1 0 BSSID SA DA n/a
312 * 1 1 RA TA DA SA
313 */
314 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
315 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
316
317 switch (hdr->frame_control &
318 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
319 case cpu_to_le16(IEEE80211_FCTL_TODS):
320 if (unlikely(iftype != NL80211_IFTYPE_AP &&
321 iftype != NL80211_IFTYPE_AP_VLAN))
322 return -1;
323 break;
324 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
325 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
f14543ee
FF		 326 iftype != NL80211_IFTYPE_MESH_POINT &&
327 iftype != NL80211_IFTYPE_AP_VLAN &&
328 iftype != NL80211_IFTYPE_STATION))
e31a16d6
ZY		 329 return -1;
330 if (iftype == NL80211_IFTYPE_MESH_POINT) {
331 struct ieee80211s_hdr *meshdr =
332 (struct ieee80211s_hdr *) (skb->data + hdrlen);
333 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
334 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
335 memcpy(dst, meshdr->eaddr1, ETH_ALEN);
336 memcpy(src, meshdr->eaddr2, ETH_ALEN);
337 }
338 }
339 break;
340 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
3c5772a5
JC		 341 if ((iftype != NL80211_IFTYPE_STATION &&
342 iftype != NL80211_IFTYPE_MESH_POINT) ||
e31a16d6
ZY		 343 (is_multicast_ether_addr(dst) &&
344 !compare_ether_addr(src, addr)))
345 return -1;
3c5772a5
JC		 346 if (iftype == NL80211_IFTYPE_MESH_POINT) {
347 struct ieee80211s_hdr *meshdr =
348 (struct ieee80211s_hdr *) (skb->data + hdrlen);
349 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
350 if (meshdr->flags & MESH_FLAGS_AE_A4)
351 memcpy(src, meshdr->eaddr1, ETH_ALEN);
352 }
e31a16d6
ZY		 353 break;
354 case cpu_to_le16(0):
355 if (iftype != NL80211_IFTYPE_ADHOC)
356 return -1;
357 break;
358 }
359
360 if (unlikely(skb->len - hdrlen < 8))
361 return -1;
362
363 payload = skb->data + hdrlen;
364 ethertype = (payload[6] << 8) | payload[7];
365
366 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
367 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
368 compare_ether_addr(payload, bridge_tunnel_header) == 0)) {
369 /* remove RFC1042 or Bridge-Tunnel encapsulation and
370 * replace EtherType */
371 skb_pull(skb, hdrlen + 6);
372 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
373 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
374 } else {
375 struct ethhdr *ehdr;
376 __be16 len;
377
378 skb_pull(skb, hdrlen);
379 len = htons(skb->len);
380 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
381 memcpy(ehdr->h_dest, dst, ETH_ALEN);
382 memcpy(ehdr->h_source, src, ETH_ALEN);
383 ehdr->h_proto = len;
384 }
385 return 0;
386}
387EXPORT_SYMBOL(ieee80211_data_to_8023);
388
eaf85ca7 389int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
e31a16d6
ZY		 390 enum nl80211_iftype iftype, u8 *bssid, bool qos)
391{
392 struct ieee80211_hdr hdr;
393 u16 hdrlen, ethertype;
394 __le16 fc;
395 const u8 *encaps_data;
396 int encaps_len, skip_header_bytes;
397 int nh_pos, h_pos;
398 int head_need;
399
400 if (unlikely(skb->len < ETH_HLEN))
401 return -EINVAL;
402
403 nh_pos = skb_network_header(skb) - skb->data;
404 h_pos = skb_transport_header(skb) - skb->data;
405
406 /* convert Ethernet header to proper 802.11 header (based on
407 * operation mode) */
408 ethertype = (skb->data[12] << 8) | skb->data[13];
409 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
410
411 switch (iftype) {
412 case NL80211_IFTYPE_AP:
413 case NL80211_IFTYPE_AP_VLAN:
414 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
415 /* DA BSSID SA */
416 memcpy(hdr.addr1, skb->data, ETH_ALEN);
417 memcpy(hdr.addr2, addr, ETH_ALEN);
418 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
419 hdrlen = 24;
420 break;
421 case NL80211_IFTYPE_STATION:
422 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
423 /* BSSID SA DA */
424 memcpy(hdr.addr1, bssid, ETH_ALEN);
425 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
426 memcpy(hdr.addr3, skb->data, ETH_ALEN);
427 hdrlen = 24;
428 break;
429 case NL80211_IFTYPE_ADHOC:
430 /* DA SA BSSID */
431 memcpy(hdr.addr1, skb->data, ETH_ALEN);
432 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
433 memcpy(hdr.addr3, bssid, ETH_ALEN);
434 hdrlen = 24;
435 break;
436 default:
437 return -EOPNOTSUPP;
438 }
439
440 if (qos) {
441 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
442 hdrlen += 2;
443 }
444
445 hdr.frame_control = fc;
446 hdr.duration_id = 0;
447 hdr.seq_ctrl = 0;
448
449 skip_header_bytes = ETH_HLEN;
450 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
451 encaps_data = bridge_tunnel_header;
452 encaps_len = sizeof(bridge_tunnel_header);
453 skip_header_bytes -= 2;
454 } else if (ethertype > 0x600) {
455 encaps_data = rfc1042_header;
456 encaps_len = sizeof(rfc1042_header);
457 skip_header_bytes -= 2;
458 } else {
459 encaps_data = NULL;
460 encaps_len = 0;
461 }
462
463 skb_pull(skb, skip_header_bytes);
464 nh_pos -= skip_header_bytes;
465 h_pos -= skip_header_bytes;
466
467 head_need = hdrlen + encaps_len - skb_headroom(skb);
468
469 if (head_need > 0 || skb_cloned(skb)) {
470 head_need = max(head_need, 0);
471 if (head_need)
472 skb_orphan(skb);
473
474 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) {
475 printk(KERN_ERR "failed to reallocate Tx buffer\n");
476 return -ENOMEM;
477 }
478 skb->truesize += head_need;
479 }
480
481 if (encaps_data) {
482 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
483 nh_pos += encaps_len;
484 h_pos += encaps_len;
485 }
486
487 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
488
489 nh_pos += hdrlen;
490 h_pos += hdrlen;
491
492 /* Update skb pointers to various headers since this modified frame
493 * is going to go through Linux networking code that may potentially
494 * need things like pointer to IP header. */
495 skb_set_mac_header(skb, 0);
496 skb_set_network_header(skb, nh_pos);
497 skb_set_transport_header(skb, h_pos);
498
499 return 0;
500}
501EXPORT_SYMBOL(ieee80211_data_from_8023);
502
eaf85ca7
ZY		 503
504void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
505 const u8 *addr, enum nl80211_iftype iftype,
506 const unsigned int extra_headroom)
507{
508 struct sk_buff *frame = NULL;
509 u16 ethertype;
510 u8 *payload;
511 const struct ethhdr *eth;
512 int remaining, err;
513 u8 dst[ETH_ALEN], src[ETH_ALEN];
514
515 err = ieee80211_data_to_8023(skb, addr, iftype);
516 if (err)
517 goto out;
518
519 /* skip the wrapping header */
520 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
521 if (!eth)
522 goto out;
523
524 while (skb != frame) {
525 u8 padding;
526 __be16 len = eth->h_proto;
527 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
528
529 remaining = skb->len;
530 memcpy(dst, eth->h_dest, ETH_ALEN);
531 memcpy(src, eth->h_source, ETH_ALEN);
532
533 padding = (4 - subframe_len) & 0x3;
534 /* the last MSDU has no padding */
535 if (subframe_len > remaining)
536 goto purge;
537
538 skb_pull(skb, sizeof(struct ethhdr));
539 /* reuse skb for the last subframe */
540 if (remaining <= subframe_len + padding)
541 frame = skb;
542 else {
543 unsigned int hlen = ALIGN(extra_headroom, 4);
544 /*
545 * Allocate and reserve two bytes more for payload
546 * alignment since sizeof(struct ethhdr) is 14.
547 */
548 frame = dev_alloc_skb(hlen + subframe_len + 2);
549 if (!frame)
550 goto purge;
551
552 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
553 memcpy(skb_put(frame, ntohs(len)), skb->data,
554 ntohs(len));
555
556 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
557 padding);
558 if (!eth) {
559 dev_kfree_skb(frame);
560 goto purge;
561 }
562 }
563
564 skb_reset_network_header(frame);
565 frame->dev = skb->dev;
566 frame->priority = skb->priority;
567
568 payload = frame->data;
569 ethertype = (payload[6] << 8) | payload[7];
570
571 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 &&
572 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
573 compare_ether_addr(payload,
574 bridge_tunnel_header) == 0)) {
575 /* remove RFC1042 or Bridge-Tunnel
576 * encapsulation and replace EtherType */
577 skb_pull(frame, 6);
578 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
579 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
580 } else {
581 memcpy(skb_push(frame, sizeof(__be16)), &len,
582 sizeof(__be16));
583 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
584 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
585 }
586 __skb_queue_tail(list, frame);
587 }
588
589 return;
590
591 purge:
592 __skb_queue_purge(list);
593 out:
594 dev_kfree_skb(skb);
595}
596EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
597
e31a16d6
ZY		 598/* Given a data frame determine the 802.1p/1d tag to use. */
599unsigned int cfg80211_classify8021d(struct sk_buff *skb)
600{
601 unsigned int dscp;
602
603 /* skb->priority values from 256->263 are magic values to
604 * directly indicate a specific 802.1d priority. This is used
605 * to allow 802.1d priority to be passed directly in from VLAN
606 * tags, etc.
607 */
608 if (skb->priority >= 256 && skb->priority <= 263)
609 return skb->priority - 256;
610
611 switch (skb->protocol) {
612 case htons(ETH_P_IP):
613 dscp = ip_hdr(skb)->tos & 0xfc;
614 break;
615 default:
616 return 0;
617 }
618
619 return dscp >> 5;
620}
621EXPORT_SYMBOL(cfg80211_classify8021d);
517357c6
JB		 622
623const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
624{
625 u8 *end, *pos;
626
627 pos = bss->information_elements;
628 if (pos == NULL)
629 return NULL;
630 end = pos + bss->len_information_elements;
631
632 while (pos + 1 < end) {
633 if (pos + 2 + pos[1] > end)
634 break;
635 if (pos[0] == ie)
636 return pos;
637 pos += 2 + pos[1];
638 }
639
640 return NULL;
641}
642EXPORT_SYMBOL(ieee80211_bss_get_ie);
fffd0934
JB		 643
644void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
645{
646 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
647 struct net_device *dev = wdev->netdev;
648 int i;
649
650 if (!wdev->connect_keys)
651 return;
652
653 for (i = 0; i < 6; i++) {
654 if (!wdev->connect_keys->params[i].cipher)
655 continue;
656 if (rdev->ops->add_key(wdev->wiphy, dev, i, NULL,
1e056665 657 &wdev->connect_keys->params[i])) {
fffd0934
JB		 658 printk(KERN_ERR "%s: failed to set key %d\n",
659 dev->name, i);
1e056665
ZY		 660 continue;
661 }
fffd0934 662 if (wdev->connect_keys->def == i)
1e056665 663 if (rdev->ops->set_default_key(wdev->wiphy, dev, i)) {
fffd0934
JB		 664 printk(KERN_ERR "%s: failed to set defkey %d\n",
665 dev->name, i);
1e056665
ZY		 666 continue;
667 }
fffd0934
JB		 668 if (wdev->connect_keys->defmgmt == i)
669 if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i))
670 printk(KERN_ERR "%s: failed to set mgtdef %d\n",
671 dev->name, i);
672 }
673
674 kfree(wdev->connect_keys);
675 wdev->connect_keys = NULL;
676}
3d54d255
JB		 677
678static void cfg80211_process_wdev_events(struct wireless_dev *wdev)
679{
680 struct cfg80211_event *ev;
681 unsigned long flags;
682 const u8 *bssid = NULL;
683
684 spin_lock_irqsave(&wdev->event_lock, flags);
685 while (!list_empty(&wdev->event_list)) {
686 ev = list_first_entry(&wdev->event_list,
687 struct cfg80211_event, list);
688 list_del(&ev->list);
689 spin_unlock_irqrestore(&wdev->event_lock, flags);
690
691 wdev_lock(wdev);
692 switch (ev->type) {
693 case EVENT_CONNECT_RESULT:
694 if (!is_zero_ether_addr(ev->cr.bssid))
695 bssid = ev->cr.bssid;
696 __cfg80211_connect_result(
697 wdev->netdev, bssid,
698 ev->cr.req_ie, ev->cr.req_ie_len,
699 ev->cr.resp_ie, ev->cr.resp_ie_len,
700 ev->cr.status,
701 ev->cr.status == WLAN_STATUS_SUCCESS,
702 NULL);
703 break;
704 case EVENT_ROAMED:
705 __cfg80211_roamed(wdev, ev->rm.bssid,
706 ev->rm.req_ie, ev->rm.req_ie_len,
707 ev->rm.resp_ie, ev->rm.resp_ie_len);
708 break;
709 case EVENT_DISCONNECTED:
710 __cfg80211_disconnected(wdev->netdev,
711 ev->dc.ie, ev->dc.ie_len,
712 ev->dc.reason, true);
713 break;
714 case EVENT_IBSS_JOINED:
715 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
716 break;
717 }
718 wdev_unlock(wdev);
719
720 kfree(ev);
721
722 spin_lock_irqsave(&wdev->event_lock, flags);
723 }
724 spin_unlock_irqrestore(&wdev->event_lock, flags);
725}
726
727void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
728{
729 struct wireless_dev *wdev;
730
731 ASSERT_RTNL();
732 ASSERT_RDEV_LOCK(rdev);
733
734 mutex_lock(&rdev->devlist_mtx);
735
736 list_for_each_entry(wdev, &rdev->netdev_list, list)
737 cfg80211_process_wdev_events(wdev);
738
739 mutex_unlock(&rdev->devlist_mtx);
740}
741
742int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
743 struct net_device *dev, enum nl80211_iftype ntype,
744 u32 *flags, struct vif_params *params)
745{
746 int err;
747 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
748
749 ASSERT_RDEV_LOCK(rdev);
750
751 /* don't support changing VLANs, you just re-create them */
752 if (otype == NL80211_IFTYPE_AP_VLAN)
753 return -EOPNOTSUPP;
754
755 if (!rdev->ops->change_virtual_intf ||
756 !(rdev->wiphy.interface_modes & (1 << ntype)))
757 return -EOPNOTSUPP;
758
ad4bb6f8
JB		 759 /* if it's part of a bridge, reject changing type to station/ibss */
760 if (dev->br_port && (ntype == NL80211_IFTYPE_ADHOC ||
761 ntype == NL80211_IFTYPE_STATION))
762 return -EBUSY;
763
3d54d255 764 if (ntype != otype) {
9bc383de
JB		 765 dev->ieee80211_ptr->use_4addr = false;
766
3d54d255
JB		 767 switch (otype) {
768 case NL80211_IFTYPE_ADHOC:
769 cfg80211_leave_ibss(rdev, dev, false);
770 break;
771 case NL80211_IFTYPE_STATION:
772 cfg80211_disconnect(rdev, dev,
773 WLAN_REASON_DEAUTH_LEAVING, true);
774 break;
775 case NL80211_IFTYPE_MESH_POINT:
776 /* mesh should be handled? */
777 break;
778 default:
779 break;
780 }
781
782 cfg80211_process_rdev_events(rdev);
783 }
784
785 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
786 ntype, flags, params);
787
788 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
789
9bc383de
JB		 790 if (!err && params && params->use_4addr != -1)
791 dev->ieee80211_ptr->use_4addr = params->use_4addr;
792
ad4bb6f8
JB		 793 if (!err) {
794 dev->priv_flags &= ~IFF_DONT_BRIDGE;
795 switch (ntype) {
796 case NL80211_IFTYPE_STATION:
797 if (dev->ieee80211_ptr->use_4addr)
798 break;
799 /* fall through */
800 case NL80211_IFTYPE_ADHOC:
801 dev->priv_flags |= IFF_DONT_BRIDGE;
802 break;
803 case NL80211_IFTYPE_AP:
804 case NL80211_IFTYPE_AP_VLAN:
805 case NL80211_IFTYPE_WDS:
806 case NL80211_IFTYPE_MESH_POINT:
807 /* bridging OK */
808 break;
809 case NL80211_IFTYPE_MONITOR:
810 /* monitor can't bridge anyway */
811 break;
812 case NL80211_IFTYPE_UNSPECIFIED:
813 case __NL80211_IFTYPE_AFTER_LAST:
814 /* not happening */
815 break;
816 }
817 }
818
3d54d255
JB		 819 return err;
820}
254416aa
JL		 821
822u16 cfg80211_calculate_bitrate(struct rate_info *rate)
823{
824 int modulation, streams, bitrate;
825
826 if (!(rate->flags & RATE_INFO_FLAGS_MCS))
827 return rate->legacy;
828
829 /* the formula below does only work for MCS values smaller than 32 */
830 if (rate->mcs >= 32)
831 return 0;
832
833 modulation = rate->mcs & 7;
834 streams = (rate->mcs >> 3) + 1;
835
836 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
837 13500000 : 6500000;
838
839 if (modulation < 4)
840 bitrate *= (modulation + 1);
841 else if (modulation == 4)
842 bitrate *= (modulation + 2);
843 else
844 bitrate *= (modulation + 3);
845
846 bitrate *= streams;
847
848 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
849 bitrate = (bitrate / 9) * 10;
850
851 /* do NOT round down here */
852 return (bitrate + 50000) / 100000;
853}
kernel source for telekom puls (alcatel/mediatek)