Root/
1 | /* |
2 | * Wireless utility functions |
3 | * |
4 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
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 <linux/if_vlan.h> |
14 | #include <linux/mpls.h> |
15 | #include "core.h" |
16 | #include "rdev-ops.h" |
17 | |
18 | |
19 | struct ieee80211_rate * |
20 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, |
21 | u32 basic_rates, int bitrate) |
22 | { |
23 | struct ieee80211_rate *result = &sband->bitrates[0]; |
24 | int i; |
25 | |
26 | for (i = 0; i < sband->n_bitrates; i++) { |
27 | if (!(basic_rates & BIT(i))) |
28 | continue; |
29 | if (sband->bitrates[i].bitrate > bitrate) |
30 | continue; |
31 | result = &sband->bitrates[i]; |
32 | } |
33 | |
34 | return result; |
35 | } |
36 | EXPORT_SYMBOL(ieee80211_get_response_rate); |
37 | |
38 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
39 | enum nl80211_bss_scan_width scan_width) |
40 | { |
41 | struct ieee80211_rate *bitrates; |
42 | u32 mandatory_rates = 0; |
43 | enum ieee80211_rate_flags mandatory_flag; |
44 | int i; |
45 | |
46 | if (WARN_ON(!sband)) |
47 | return 1; |
48 | |
49 | if (sband->band == IEEE80211_BAND_2GHZ) { |
50 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
51 | scan_width == NL80211_BSS_CHAN_WIDTH_10) |
52 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; |
53 | else |
54 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; |
55 | } else { |
56 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
57 | } |
58 | |
59 | bitrates = sband->bitrates; |
60 | for (i = 0; i < sband->n_bitrates; i++) |
61 | if (bitrates[i].flags & mandatory_flag) |
62 | mandatory_rates |= BIT(i); |
63 | return mandatory_rates; |
64 | } |
65 | EXPORT_SYMBOL(ieee80211_mandatory_rates); |
66 | |
67 | int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
68 | { |
69 | /* see 802.11 17.3.8.3.2 and Annex J |
70 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ |
71 | if (chan <= 0) |
72 | return 0; /* not supported */ |
73 | switch (band) { |
74 | case IEEE80211_BAND_2GHZ: |
75 | if (chan == 14) |
76 | return 2484; |
77 | else if (chan < 14) |
78 | return 2407 + chan * 5; |
79 | break; |
80 | case IEEE80211_BAND_5GHZ: |
81 | if (chan >= 182 && chan <= 196) |
82 | return 4000 + chan * 5; |
83 | else |
84 | return 5000 + chan * 5; |
85 | break; |
86 | case IEEE80211_BAND_60GHZ: |
87 | if (chan < 5) |
88 | return 56160 + chan * 2160; |
89 | break; |
90 | default: |
91 | ; |
92 | } |
93 | return 0; /* not supported */ |
94 | } |
95 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); |
96 | |
97 | int ieee80211_frequency_to_channel(int freq) |
98 | { |
99 | /* see 802.11 17.3.8.3.2 and Annex J */ |
100 | if (freq == 2484) |
101 | return 14; |
102 | else if (freq < 2484) |
103 | return (freq - 2407) / 5; |
104 | else if (freq >= 4910 && freq <= 4980) |
105 | return (freq - 4000) / 5; |
106 | else if (freq <= 45000) /* DMG band lower limit */ |
107 | return (freq - 5000) / 5; |
108 | else if (freq >= 58320 && freq <= 64800) |
109 | return (freq - 56160) / 2160; |
110 | else |
111 | return 0; |
112 | } |
113 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); |
114 | |
115 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
116 | int freq) |
117 | { |
118 | enum ieee80211_band band; |
119 | struct ieee80211_supported_band *sband; |
120 | int i; |
121 | |
122 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
123 | sband = wiphy->bands[band]; |
124 | |
125 | if (!sband) |
126 | continue; |
127 | |
128 | for (i = 0; i < sband->n_channels; i++) { |
129 | if (sband->channels[i].center_freq == freq) |
130 | return &sband->channels[i]; |
131 | } |
132 | } |
133 | |
134 | return NULL; |
135 | } |
136 | EXPORT_SYMBOL(__ieee80211_get_channel); |
137 | |
138 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
139 | enum ieee80211_band band) |
140 | { |
141 | int i, want; |
142 | |
143 | switch (band) { |
144 | case IEEE80211_BAND_5GHZ: |
145 | want = 3; |
146 | for (i = 0; i < sband->n_bitrates; i++) { |
147 | if (sband->bitrates[i].bitrate == 60 || |
148 | sband->bitrates[i].bitrate == 120 || |
149 | sband->bitrates[i].bitrate == 240) { |
150 | sband->bitrates[i].flags |= |
151 | IEEE80211_RATE_MANDATORY_A; |
152 | want--; |
153 | } |
154 | } |
155 | WARN_ON(want); |
156 | break; |
157 | case IEEE80211_BAND_2GHZ: |
158 | want = 7; |
159 | for (i = 0; i < sband->n_bitrates; i++) { |
160 | if (sband->bitrates[i].bitrate == 10) { |
161 | sband->bitrates[i].flags |= |
162 | IEEE80211_RATE_MANDATORY_B | |
163 | IEEE80211_RATE_MANDATORY_G; |
164 | want--; |
165 | } |
166 | |
167 | if (sband->bitrates[i].bitrate == 20 || |
168 | sband->bitrates[i].bitrate == 55 || |
169 | sband->bitrates[i].bitrate == 110 || |
170 | sband->bitrates[i].bitrate == 60 || |
171 | sband->bitrates[i].bitrate == 120 || |
172 | sband->bitrates[i].bitrate == 240) { |
173 | sband->bitrates[i].flags |= |
174 | IEEE80211_RATE_MANDATORY_G; |
175 | want--; |
176 | } |
177 | |
178 | if (sband->bitrates[i].bitrate != 10 && |
179 | sband->bitrates[i].bitrate != 20 && |
180 | sband->bitrates[i].bitrate != 55 && |
181 | sband->bitrates[i].bitrate != 110) |
182 | sband->bitrates[i].flags |= |
183 | IEEE80211_RATE_ERP_G; |
184 | } |
185 | WARN_ON(want != 0 && want != 3 && want != 6); |
186 | break; |
187 | case IEEE80211_BAND_60GHZ: |
188 | /* check for mandatory HT MCS 1..4 */ |
189 | WARN_ON(!sband->ht_cap.ht_supported); |
190 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); |
191 | break; |
192 | case IEEE80211_NUM_BANDS: |
193 | WARN_ON(1); |
194 | break; |
195 | } |
196 | } |
197 | |
198 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) |
199 | { |
200 | enum ieee80211_band band; |
201 | |
202 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
203 | if (wiphy->bands[band]) |
204 | set_mandatory_flags_band(wiphy->bands[band], band); |
205 | } |
206 | |
207 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
208 | { |
209 | int i; |
210 | for (i = 0; i < wiphy->n_cipher_suites; i++) |
211 | if (cipher == wiphy->cipher_suites[i]) |
212 | return true; |
213 | return false; |
214 | } |
215 | |
216 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
217 | struct key_params *params, int key_idx, |
218 | bool pairwise, const u8 *mac_addr) |
219 | { |
220 | if (key_idx > 5) |
221 | return -EINVAL; |
222 | |
223 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
224 | return -EINVAL; |
225 | |
226 | if (pairwise && !mac_addr) |
227 | return -EINVAL; |
228 | |
229 | /* |
230 | * Disallow pairwise keys with non-zero index unless it's WEP |
231 | * or a vendor specific cipher (because current deployments use |
232 | * pairwise WEP keys with non-zero indices and for vendor specific |
233 | * ciphers this should be validated in the driver or hardware level |
234 | * - but 802.11i clearly specifies to use zero) |
235 | */ |
236 | if (pairwise && key_idx && |
237 | ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
238 | (params->cipher == WLAN_CIPHER_SUITE_CCMP) || |
239 | (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) |
240 | return -EINVAL; |
241 | |
242 | switch (params->cipher) { |
243 | case WLAN_CIPHER_SUITE_WEP40: |
244 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
245 | return -EINVAL; |
246 | break; |
247 | case WLAN_CIPHER_SUITE_TKIP: |
248 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
249 | return -EINVAL; |
250 | break; |
251 | case WLAN_CIPHER_SUITE_CCMP: |
252 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
253 | return -EINVAL; |
254 | break; |
255 | case WLAN_CIPHER_SUITE_WEP104: |
256 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
257 | return -EINVAL; |
258 | break; |
259 | case WLAN_CIPHER_SUITE_AES_CMAC: |
260 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
261 | return -EINVAL; |
262 | break; |
263 | default: |
264 | /* |
265 | * We don't know anything about this algorithm, |
266 | * allow using it -- but the driver must check |
267 | * all parameters! We still check below whether |
268 | * or not the driver supports this algorithm, |
269 | * of course. |
270 | */ |
271 | break; |
272 | } |
273 | |
274 | if (params->seq) { |
275 | switch (params->cipher) { |
276 | case WLAN_CIPHER_SUITE_WEP40: |
277 | case WLAN_CIPHER_SUITE_WEP104: |
278 | /* These ciphers do not use key sequence */ |
279 | return -EINVAL; |
280 | case WLAN_CIPHER_SUITE_TKIP: |
281 | case WLAN_CIPHER_SUITE_CCMP: |
282 | case WLAN_CIPHER_SUITE_AES_CMAC: |
283 | if (params->seq_len != 6) |
284 | return -EINVAL; |
285 | break; |
286 | } |
287 | } |
288 | |
289 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
290 | return -EINVAL; |
291 | |
292 | return 0; |
293 | } |
294 | |
295 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
296 | { |
297 | unsigned int hdrlen = 24; |
298 | |
299 | if (ieee80211_is_data(fc)) { |
300 | if (ieee80211_has_a4(fc)) |
301 | hdrlen = 30; |
302 | if (ieee80211_is_data_qos(fc)) { |
303 | hdrlen += IEEE80211_QOS_CTL_LEN; |
304 | if (ieee80211_has_order(fc)) |
305 | hdrlen += IEEE80211_HT_CTL_LEN; |
306 | } |
307 | goto out; |
308 | } |
309 | |
310 | if (ieee80211_is_ctl(fc)) { |
311 | /* |
312 | * ACK and CTS are 10 bytes, all others 16. To see how |
313 | * to get this condition consider |
314 | * subtype mask: 0b0000000011110000 (0x00F0) |
315 | * ACK subtype: 0b0000000011010000 (0x00D0) |
316 | * CTS subtype: 0b0000000011000000 (0x00C0) |
317 | * bits that matter: ^^^ (0x00E0) |
318 | * value of those: 0b0000000011000000 (0x00C0) |
319 | */ |
320 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) |
321 | hdrlen = 10; |
322 | else |
323 | hdrlen = 16; |
324 | } |
325 | out: |
326 | return hdrlen; |
327 | } |
328 | EXPORT_SYMBOL(ieee80211_hdrlen); |
329 | |
330 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
331 | { |
332 | const struct ieee80211_hdr *hdr = |
333 | (const struct ieee80211_hdr *)skb->data; |
334 | unsigned int hdrlen; |
335 | |
336 | if (unlikely(skb->len < 10)) |
337 | return 0; |
338 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
339 | if (unlikely(hdrlen > skb->len)) |
340 | return 0; |
341 | return hdrlen; |
342 | } |
343 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); |
344 | |
345 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
346 | { |
347 | int ae = meshhdr->flags & MESH_FLAGS_AE; |
348 | /* 802.11-2012, 8.2.4.7.3 */ |
349 | switch (ae) { |
350 | default: |
351 | case 0: |
352 | return 6; |
353 | case MESH_FLAGS_AE_A4: |
354 | return 12; |
355 | case MESH_FLAGS_AE_A5_A6: |
356 | return 18; |
357 | } |
358 | } |
359 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
360 | |
361 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
362 | enum nl80211_iftype iftype) |
363 | { |
364 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
365 | u16 hdrlen, ethertype; |
366 | u8 *payload; |
367 | u8 dst[ETH_ALEN]; |
368 | u8 src[ETH_ALEN] __aligned(2); |
369 | |
370 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
371 | return -1; |
372 | |
373 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
374 | |
375 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet |
376 | * header |
377 | * IEEE 802.11 address fields: |
378 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 |
379 | * 0 0 DA SA BSSID n/a |
380 | * 0 1 DA BSSID SA n/a |
381 | * 1 0 BSSID SA DA n/a |
382 | * 1 1 RA TA DA SA |
383 | */ |
384 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); |
385 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); |
386 | |
387 | switch (hdr->frame_control & |
388 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
389 | case cpu_to_le16(IEEE80211_FCTL_TODS): |
390 | if (unlikely(iftype != NL80211_IFTYPE_AP && |
391 | iftype != NL80211_IFTYPE_AP_VLAN && |
392 | iftype != NL80211_IFTYPE_P2P_GO)) |
393 | return -1; |
394 | break; |
395 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): |
396 | if (unlikely(iftype != NL80211_IFTYPE_WDS && |
397 | iftype != NL80211_IFTYPE_MESH_POINT && |
398 | iftype != NL80211_IFTYPE_AP_VLAN && |
399 | iftype != NL80211_IFTYPE_STATION)) |
400 | return -1; |
401 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
402 | struct ieee80211s_hdr *meshdr = |
403 | (struct ieee80211s_hdr *) (skb->data + hdrlen); |
404 | /* make sure meshdr->flags is on the linear part */ |
405 | if (!pskb_may_pull(skb, hdrlen + 1)) |
406 | return -1; |
407 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
408 | return -1; |
409 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
410 | skb_copy_bits(skb, hdrlen + |
411 | offsetof(struct ieee80211s_hdr, eaddr1), |
412 | dst, ETH_ALEN); |
413 | skb_copy_bits(skb, hdrlen + |
414 | offsetof(struct ieee80211s_hdr, eaddr2), |
415 | src, ETH_ALEN); |
416 | } |
417 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
418 | } |
419 | break; |
420 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): |
421 | if ((iftype != NL80211_IFTYPE_STATION && |
422 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
423 | iftype != NL80211_IFTYPE_MESH_POINT) || |
424 | (is_multicast_ether_addr(dst) && |
425 | ether_addr_equal(src, addr))) |
426 | return -1; |
427 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
428 | struct ieee80211s_hdr *meshdr = |
429 | (struct ieee80211s_hdr *) (skb->data + hdrlen); |
430 | /* make sure meshdr->flags is on the linear part */ |
431 | if (!pskb_may_pull(skb, hdrlen + 1)) |
432 | return -1; |
433 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) |
434 | return -1; |
435 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
436 | skb_copy_bits(skb, hdrlen + |
437 | offsetof(struct ieee80211s_hdr, eaddr1), |
438 | src, ETH_ALEN); |
439 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
440 | } |
441 | break; |
442 | case cpu_to_le16(0): |
443 | if (iftype != NL80211_IFTYPE_ADHOC && |
444 | iftype != NL80211_IFTYPE_STATION) |
445 | return -1; |
446 | break; |
447 | } |
448 | |
449 | if (!pskb_may_pull(skb, hdrlen + 8)) |
450 | return -1; |
451 | |
452 | payload = skb->data + hdrlen; |
453 | ethertype = (payload[6] << 8) | payload[7]; |
454 | |
455 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
456 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
457 | ether_addr_equal(payload, bridge_tunnel_header))) { |
458 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
459 | * replace EtherType */ |
460 | skb_pull(skb, hdrlen + 6); |
461 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
462 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
463 | } else { |
464 | struct ethhdr *ehdr; |
465 | __be16 len; |
466 | |
467 | skb_pull(skb, hdrlen); |
468 | len = htons(skb->len); |
469 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); |
470 | memcpy(ehdr->h_dest, dst, ETH_ALEN); |
471 | memcpy(ehdr->h_source, src, ETH_ALEN); |
472 | ehdr->h_proto = len; |
473 | } |
474 | return 0; |
475 | } |
476 | EXPORT_SYMBOL(ieee80211_data_to_8023); |
477 | |
478 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
479 | enum nl80211_iftype iftype, u8 *bssid, bool qos) |
480 | { |
481 | struct ieee80211_hdr hdr; |
482 | u16 hdrlen, ethertype; |
483 | __le16 fc; |
484 | const u8 *encaps_data; |
485 | int encaps_len, skip_header_bytes; |
486 | int nh_pos, h_pos; |
487 | int head_need; |
488 | |
489 | if (unlikely(skb->len < ETH_HLEN)) |
490 | return -EINVAL; |
491 | |
492 | nh_pos = skb_network_header(skb) - skb->data; |
493 | h_pos = skb_transport_header(skb) - skb->data; |
494 | |
495 | /* convert Ethernet header to proper 802.11 header (based on |
496 | * operation mode) */ |
497 | ethertype = (skb->data[12] << 8) | skb->data[13]; |
498 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
499 | |
500 | switch (iftype) { |
501 | case NL80211_IFTYPE_AP: |
502 | case NL80211_IFTYPE_AP_VLAN: |
503 | case NL80211_IFTYPE_P2P_GO: |
504 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
505 | /* DA BSSID SA */ |
506 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
507 | memcpy(hdr.addr2, addr, ETH_ALEN); |
508 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
509 | hdrlen = 24; |
510 | break; |
511 | case NL80211_IFTYPE_STATION: |
512 | case NL80211_IFTYPE_P2P_CLIENT: |
513 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
514 | /* BSSID SA DA */ |
515 | memcpy(hdr.addr1, bssid, ETH_ALEN); |
516 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
517 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
518 | hdrlen = 24; |
519 | break; |
520 | case NL80211_IFTYPE_ADHOC: |
521 | /* DA SA BSSID */ |
522 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
523 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
524 | memcpy(hdr.addr3, bssid, ETH_ALEN); |
525 | hdrlen = 24; |
526 | break; |
527 | default: |
528 | return -EOPNOTSUPP; |
529 | } |
530 | |
531 | if (qos) { |
532 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
533 | hdrlen += 2; |
534 | } |
535 | |
536 | hdr.frame_control = fc; |
537 | hdr.duration_id = 0; |
538 | hdr.seq_ctrl = 0; |
539 | |
540 | skip_header_bytes = ETH_HLEN; |
541 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { |
542 | encaps_data = bridge_tunnel_header; |
543 | encaps_len = sizeof(bridge_tunnel_header); |
544 | skip_header_bytes -= 2; |
545 | } else if (ethertype >= ETH_P_802_3_MIN) { |
546 | encaps_data = rfc1042_header; |
547 | encaps_len = sizeof(rfc1042_header); |
548 | skip_header_bytes -= 2; |
549 | } else { |
550 | encaps_data = NULL; |
551 | encaps_len = 0; |
552 | } |
553 | |
554 | skb_pull(skb, skip_header_bytes); |
555 | nh_pos -= skip_header_bytes; |
556 | h_pos -= skip_header_bytes; |
557 | |
558 | head_need = hdrlen + encaps_len - skb_headroom(skb); |
559 | |
560 | if (head_need > 0 || skb_cloned(skb)) { |
561 | head_need = max(head_need, 0); |
562 | if (head_need) |
563 | skb_orphan(skb); |
564 | |
565 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
566 | return -ENOMEM; |
567 | |
568 | skb->truesize += head_need; |
569 | } |
570 | |
571 | if (encaps_data) { |
572 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
573 | nh_pos += encaps_len; |
574 | h_pos += encaps_len; |
575 | } |
576 | |
577 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); |
578 | |
579 | nh_pos += hdrlen; |
580 | h_pos += hdrlen; |
581 | |
582 | /* Update skb pointers to various headers since this modified frame |
583 | * is going to go through Linux networking code that may potentially |
584 | * need things like pointer to IP header. */ |
585 | skb_set_mac_header(skb, 0); |
586 | skb_set_network_header(skb, nh_pos); |
587 | skb_set_transport_header(skb, h_pos); |
588 | |
589 | return 0; |
590 | } |
591 | EXPORT_SYMBOL(ieee80211_data_from_8023); |
592 | |
593 | |
594 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, |
595 | const u8 *addr, enum nl80211_iftype iftype, |
596 | const unsigned int extra_headroom, |
597 | bool has_80211_header) |
598 | { |
599 | struct sk_buff *frame = NULL; |
600 | u16 ethertype; |
601 | u8 *payload; |
602 | const struct ethhdr *eth; |
603 | int remaining, err; |
604 | u8 dst[ETH_ALEN], src[ETH_ALEN]; |
605 | |
606 | if (has_80211_header) { |
607 | err = ieee80211_data_to_8023(skb, addr, iftype); |
608 | if (err) |
609 | goto out; |
610 | |
611 | /* skip the wrapping header */ |
612 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); |
613 | if (!eth) |
614 | goto out; |
615 | } else { |
616 | eth = (struct ethhdr *) skb->data; |
617 | } |
618 | |
619 | while (skb != frame) { |
620 | u8 padding; |
621 | __be16 len = eth->h_proto; |
622 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); |
623 | |
624 | remaining = skb->len; |
625 | memcpy(dst, eth->h_dest, ETH_ALEN); |
626 | memcpy(src, eth->h_source, ETH_ALEN); |
627 | |
628 | padding = (4 - subframe_len) & 0x3; |
629 | /* the last MSDU has no padding */ |
630 | if (subframe_len > remaining) |
631 | goto purge; |
632 | |
633 | skb_pull(skb, sizeof(struct ethhdr)); |
634 | /* reuse skb for the last subframe */ |
635 | if (remaining <= subframe_len + padding) |
636 | frame = skb; |
637 | else { |
638 | unsigned int hlen = ALIGN(extra_headroom, 4); |
639 | /* |
640 | * Allocate and reserve two bytes more for payload |
641 | * alignment since sizeof(struct ethhdr) is 14. |
642 | */ |
643 | frame = dev_alloc_skb(hlen + subframe_len + 2); |
644 | if (!frame) |
645 | goto purge; |
646 | |
647 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); |
648 | memcpy(skb_put(frame, ntohs(len)), skb->data, |
649 | ntohs(len)); |
650 | |
651 | eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + |
652 | padding); |
653 | if (!eth) { |
654 | dev_kfree_skb(frame); |
655 | goto purge; |
656 | } |
657 | } |
658 | |
659 | skb_reset_network_header(frame); |
660 | frame->dev = skb->dev; |
661 | frame->priority = skb->priority; |
662 | |
663 | payload = frame->data; |
664 | ethertype = (payload[6] << 8) | payload[7]; |
665 | |
666 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
667 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
668 | ether_addr_equal(payload, bridge_tunnel_header))) { |
669 | /* remove RFC1042 or Bridge-Tunnel |
670 | * encapsulation and replace EtherType */ |
671 | skb_pull(frame, 6); |
672 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
673 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); |
674 | } else { |
675 | memcpy(skb_push(frame, sizeof(__be16)), &len, |
676 | sizeof(__be16)); |
677 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
678 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); |
679 | } |
680 | __skb_queue_tail(list, frame); |
681 | } |
682 | |
683 | return; |
684 | |
685 | purge: |
686 | __skb_queue_purge(list); |
687 | out: |
688 | dev_kfree_skb(skb); |
689 | } |
690 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); |
691 | |
692 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
693 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
694 | struct cfg80211_qos_map *qos_map) |
695 | { |
696 | unsigned int dscp; |
697 | unsigned char vlan_priority; |
698 | |
699 | /* skb->priority values from 256->263 are magic values to |
700 | * directly indicate a specific 802.1d priority. This is used |
701 | * to allow 802.1d priority to be passed directly in from VLAN |
702 | * tags, etc. |
703 | */ |
704 | if (skb->priority >= 256 && skb->priority <= 263) |
705 | return skb->priority - 256; |
706 | |
707 | if (vlan_tx_tag_present(skb)) { |
708 | vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK) |
709 | >> VLAN_PRIO_SHIFT; |
710 | if (vlan_priority > 0) |
711 | return vlan_priority; |
712 | } |
713 | |
714 | switch (skb->protocol) { |
715 | case htons(ETH_P_IP): |
716 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
717 | break; |
718 | case htons(ETH_P_IPV6): |
719 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; |
720 | break; |
721 | case htons(ETH_P_MPLS_UC): |
722 | case htons(ETH_P_MPLS_MC): { |
723 | struct mpls_label mpls_tmp, *mpls; |
724 | |
725 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), |
726 | sizeof(*mpls), &mpls_tmp); |
727 | if (!mpls) |
728 | return 0; |
729 | |
730 | return (ntohl(mpls->entry) & MPLS_LS_TC_MASK) |
731 | >> MPLS_LS_TC_SHIFT; |
732 | } |
733 | case htons(ETH_P_80221): |
734 | /* 802.21 is always network control traffic */ |
735 | return 7; |
736 | default: |
737 | return 0; |
738 | } |
739 | |
740 | if (qos_map) { |
741 | unsigned int i, tmp_dscp = dscp >> 2; |
742 | |
743 | for (i = 0; i < qos_map->num_des; i++) { |
744 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) |
745 | return qos_map->dscp_exception[i].up; |
746 | } |
747 | |
748 | for (i = 0; i < 8; i++) { |
749 | if (tmp_dscp >= qos_map->up[i].low && |
750 | tmp_dscp <= qos_map->up[i].high) |
751 | return i; |
752 | } |
753 | } |
754 | |
755 | return dscp >> 5; |
756 | } |
757 | EXPORT_SYMBOL(cfg80211_classify8021d); |
758 | |
759 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) |
760 | { |
761 | const struct cfg80211_bss_ies *ies; |
762 | |
763 | ies = rcu_dereference(bss->ies); |
764 | if (!ies) |
765 | return NULL; |
766 | |
767 | return cfg80211_find_ie(ie, ies->data, ies->len); |
768 | } |
769 | EXPORT_SYMBOL(ieee80211_bss_get_ie); |
770 | |
771 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) |
772 | { |
773 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
774 | struct net_device *dev = wdev->netdev; |
775 | int i; |
776 | |
777 | if (!wdev->connect_keys) |
778 | return; |
779 | |
780 | for (i = 0; i < 6; i++) { |
781 | if (!wdev->connect_keys->params[i].cipher) |
782 | continue; |
783 | if (rdev_add_key(rdev, dev, i, false, NULL, |
784 | &wdev->connect_keys->params[i])) { |
785 | netdev_err(dev, "failed to set key %d\n", i); |
786 | continue; |
787 | } |
788 | if (wdev->connect_keys->def == i) |
789 | if (rdev_set_default_key(rdev, dev, i, true, true)) { |
790 | netdev_err(dev, "failed to set defkey %d\n", i); |
791 | continue; |
792 | } |
793 | if (wdev->connect_keys->defmgmt == i) |
794 | if (rdev_set_default_mgmt_key(rdev, dev, i)) |
795 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
796 | } |
797 | |
798 | kfree(wdev->connect_keys); |
799 | wdev->connect_keys = NULL; |
800 | } |
801 | |
802 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
803 | { |
804 | struct cfg80211_event *ev; |
805 | unsigned long flags; |
806 | const u8 *bssid = NULL; |
807 | |
808 | spin_lock_irqsave(&wdev->event_lock, flags); |
809 | while (!list_empty(&wdev->event_list)) { |
810 | ev = list_first_entry(&wdev->event_list, |
811 | struct cfg80211_event, list); |
812 | list_del(&ev->list); |
813 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
814 | |
815 | wdev_lock(wdev); |
816 | switch (ev->type) { |
817 | case EVENT_CONNECT_RESULT: |
818 | if (!is_zero_ether_addr(ev->cr.bssid)) |
819 | bssid = ev->cr.bssid; |
820 | __cfg80211_connect_result( |
821 | wdev->netdev, bssid, |
822 | ev->cr.req_ie, ev->cr.req_ie_len, |
823 | ev->cr.resp_ie, ev->cr.resp_ie_len, |
824 | ev->cr.status, |
825 | ev->cr.status == WLAN_STATUS_SUCCESS, |
826 | NULL); |
827 | break; |
828 | case EVENT_ROAMED: |
829 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
830 | ev->rm.req_ie_len, ev->rm.resp_ie, |
831 | ev->rm.resp_ie_len); |
832 | break; |
833 | case EVENT_DISCONNECTED: |
834 | __cfg80211_disconnected(wdev->netdev, |
835 | ev->dc.ie, ev->dc.ie_len, |
836 | ev->dc.reason, true); |
837 | break; |
838 | case EVENT_IBSS_JOINED: |
839 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
840 | ev->ij.channel); |
841 | break; |
842 | } |
843 | wdev_unlock(wdev); |
844 | |
845 | kfree(ev); |
846 | |
847 | spin_lock_irqsave(&wdev->event_lock, flags); |
848 | } |
849 | spin_unlock_irqrestore(&wdev->event_lock, flags); |
850 | } |
851 | |
852 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) |
853 | { |
854 | struct wireless_dev *wdev; |
855 | |
856 | ASSERT_RTNL(); |
857 | |
858 | list_for_each_entry(wdev, &rdev->wdev_list, list) |
859 | cfg80211_process_wdev_events(wdev); |
860 | } |
861 | |
862 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, |
863 | struct net_device *dev, enum nl80211_iftype ntype, |
864 | u32 *flags, struct vif_params *params) |
865 | { |
866 | int err; |
867 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; |
868 | |
869 | ASSERT_RTNL(); |
870 | |
871 | /* don't support changing VLANs, you just re-create them */ |
872 | if (otype == NL80211_IFTYPE_AP_VLAN) |
873 | return -EOPNOTSUPP; |
874 | |
875 | /* cannot change into P2P device type */ |
876 | if (ntype == NL80211_IFTYPE_P2P_DEVICE) |
877 | return -EOPNOTSUPP; |
878 | |
879 | if (!rdev->ops->change_virtual_intf || |
880 | !(rdev->wiphy.interface_modes & (1 << ntype))) |
881 | return -EOPNOTSUPP; |
882 | |
883 | /* if it's part of a bridge, reject changing type to station/ibss */ |
884 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
885 | (ntype == NL80211_IFTYPE_ADHOC || |
886 | ntype == NL80211_IFTYPE_STATION || |
887 | ntype == NL80211_IFTYPE_P2P_CLIENT)) |
888 | return -EBUSY; |
889 | |
890 | if (ntype != otype && netif_running(dev)) { |
891 | err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr, |
892 | ntype); |
893 | if (err) |
894 | return err; |
895 | |
896 | dev->ieee80211_ptr->use_4addr = false; |
897 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
898 | wdev_lock(dev->ieee80211_ptr); |
899 | rdev_set_qos_map(rdev, dev, NULL); |
900 | wdev_unlock(dev->ieee80211_ptr); |
901 | |
902 | switch (otype) { |
903 | case NL80211_IFTYPE_AP: |
904 | cfg80211_stop_ap(rdev, dev, true); |
905 | break; |
906 | case NL80211_IFTYPE_ADHOC: |
907 | cfg80211_leave_ibss(rdev, dev, false); |
908 | break; |
909 | case NL80211_IFTYPE_STATION: |
910 | case NL80211_IFTYPE_P2P_CLIENT: |
911 | wdev_lock(dev->ieee80211_ptr); |
912 | cfg80211_disconnect(rdev, dev, |
913 | WLAN_REASON_DEAUTH_LEAVING, true); |
914 | wdev_unlock(dev->ieee80211_ptr); |
915 | break; |
916 | case NL80211_IFTYPE_MESH_POINT: |
917 | /* mesh should be handled? */ |
918 | break; |
919 | default: |
920 | break; |
921 | } |
922 | |
923 | cfg80211_process_rdev_events(rdev); |
924 | } |
925 | |
926 | err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
927 | |
928 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); |
929 | |
930 | if (!err && params && params->use_4addr != -1) |
931 | dev->ieee80211_ptr->use_4addr = params->use_4addr; |
932 | |
933 | if (!err) { |
934 | dev->priv_flags &= ~IFF_DONT_BRIDGE; |
935 | switch (ntype) { |
936 | case NL80211_IFTYPE_STATION: |
937 | if (dev->ieee80211_ptr->use_4addr) |
938 | break; |
939 | /* fall through */ |
940 | case NL80211_IFTYPE_P2P_CLIENT: |
941 | case NL80211_IFTYPE_ADHOC: |
942 | dev->priv_flags |= IFF_DONT_BRIDGE; |
943 | break; |
944 | case NL80211_IFTYPE_P2P_GO: |
945 | case NL80211_IFTYPE_AP: |
946 | case NL80211_IFTYPE_AP_VLAN: |
947 | case NL80211_IFTYPE_WDS: |
948 | case NL80211_IFTYPE_MESH_POINT: |
949 | /* bridging OK */ |
950 | break; |
951 | case NL80211_IFTYPE_MONITOR: |
952 | /* monitor can't bridge anyway */ |
953 | break; |
954 | case NL80211_IFTYPE_UNSPECIFIED: |
955 | case NUM_NL80211_IFTYPES: |
956 | /* not happening */ |
957 | break; |
958 | case NL80211_IFTYPE_P2P_DEVICE: |
959 | WARN_ON(1); |
960 | break; |
961 | } |
962 | } |
963 | |
964 | if (!err && ntype != otype && netif_running(dev)) { |
965 | cfg80211_update_iface_num(rdev, ntype, 1); |
966 | cfg80211_update_iface_num(rdev, otype, -1); |
967 | } |
968 | |
969 | return err; |
970 | } |
971 | |
972 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
973 | { |
974 | static const u32 __mcs2bitrate[] = { |
975 | /* control PHY */ |
976 | [0] = 275, |
977 | /* SC PHY */ |
978 | [1] = 3850, |
979 | [2] = 7700, |
980 | [3] = 9625, |
981 | [4] = 11550, |
982 | [5] = 12512, /* 1251.25 mbps */ |
983 | [6] = 15400, |
984 | [7] = 19250, |
985 | [8] = 23100, |
986 | [9] = 25025, |
987 | [10] = 30800, |
988 | [11] = 38500, |
989 | [12] = 46200, |
990 | /* OFDM PHY */ |
991 | [13] = 6930, |
992 | [14] = 8662, /* 866.25 mbps */ |
993 | [15] = 13860, |
994 | [16] = 17325, |
995 | [17] = 20790, |
996 | [18] = 27720, |
997 | [19] = 34650, |
998 | [20] = 41580, |
999 | [21] = 45045, |
1000 | [22] = 51975, |
1001 | [23] = 62370, |
1002 | [24] = 67568, /* 6756.75 mbps */ |
1003 | /* LP-SC PHY */ |
1004 | [25] = 6260, |
1005 | [26] = 8340, |
1006 | [27] = 11120, |
1007 | [28] = 12510, |
1008 | [29] = 16680, |
1009 | [30] = 22240, |
1010 | [31] = 25030, |
1011 | }; |
1012 | |
1013 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) |
1014 | return 0; |
1015 | |
1016 | return __mcs2bitrate[rate->mcs]; |
1017 | } |
1018 | |
1019 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1020 | { |
1021 | static const u32 base[4][10] = { |
1022 | { 6500000, |
1023 | 13000000, |
1024 | 19500000, |
1025 | 26000000, |
1026 | 39000000, |
1027 | 52000000, |
1028 | 58500000, |
1029 | 65000000, |
1030 | 78000000, |
1031 | 0, |
1032 | }, |
1033 | { 13500000, |
1034 | 27000000, |
1035 | 40500000, |
1036 | 54000000, |
1037 | 81000000, |
1038 | 108000000, |
1039 | 121500000, |
1040 | 135000000, |
1041 | 162000000, |
1042 | 180000000, |
1043 | }, |
1044 | { 29300000, |
1045 | 58500000, |
1046 | 87800000, |
1047 | 117000000, |
1048 | 175500000, |
1049 | 234000000, |
1050 | 263300000, |
1051 | 292500000, |
1052 | 351000000, |
1053 | 390000000, |
1054 | }, |
1055 | { 58500000, |
1056 | 117000000, |
1057 | 175500000, |
1058 | 234000000, |
1059 | 351000000, |
1060 | 468000000, |
1061 | 526500000, |
1062 | 585000000, |
1063 | 702000000, |
1064 | 780000000, |
1065 | }, |
1066 | }; |
1067 | u32 bitrate; |
1068 | int idx; |
1069 | |
1070 | if (WARN_ON_ONCE(rate->mcs > 9)) |
1071 | return 0; |
1072 | |
1073 | idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH | |
1074 | RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 : |
1075 | rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 : |
1076 | rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 0; |
1077 | |
1078 | bitrate = base[idx][rate->mcs]; |
1079 | bitrate *= rate->nss; |
1080 | |
1081 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
1082 | bitrate = (bitrate / 9) * 10; |
1083 | |
1084 | /* do NOT round down here */ |
1085 | return (bitrate + 50000) / 100000; |
1086 | } |
1087 | |
1088 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
1089 | { |
1090 | int modulation, streams, bitrate; |
1091 | |
1092 | if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
1093 | !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) |
1094 | return rate->legacy; |
1095 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1096 | return cfg80211_calculate_bitrate_60g(rate); |
1097 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1098 | return cfg80211_calculate_bitrate_vht(rate); |
1099 | |
1100 | /* the formula below does only work for MCS values smaller than 32 */ |
1101 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
1102 | return 0; |
1103 | |
1104 | modulation = rate->mcs & 7; |
1105 | streams = (rate->mcs >> 3) + 1; |
1106 | |
1107 | bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? |
1108 | 13500000 : 6500000; |
1109 | |
1110 | if (modulation < 4) |
1111 | bitrate *= (modulation + 1); |
1112 | else if (modulation == 4) |
1113 | bitrate *= (modulation + 2); |
1114 | else |
1115 | bitrate *= (modulation + 3); |
1116 | |
1117 | bitrate *= streams; |
1118 | |
1119 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
1120 | bitrate = (bitrate / 9) * 10; |
1121 | |
1122 | /* do NOT round down here */ |
1123 | return (bitrate + 50000) / 100000; |
1124 | } |
1125 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
1126 | |
1127 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1128 | enum ieee80211_p2p_attr_id attr, |
1129 | u8 *buf, unsigned int bufsize) |
1130 | { |
1131 | u8 *out = buf; |
1132 | u16 attr_remaining = 0; |
1133 | bool desired_attr = false; |
1134 | u16 desired_len = 0; |
1135 | |
1136 | while (len > 0) { |
1137 | unsigned int iedatalen; |
1138 | unsigned int copy; |
1139 | const u8 *iedata; |
1140 | |
1141 | if (len < 2) |
1142 | return -EILSEQ; |
1143 | iedatalen = ies[1]; |
1144 | if (iedatalen + 2 > len) |
1145 | return -EILSEQ; |
1146 | |
1147 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) |
1148 | goto cont; |
1149 | |
1150 | if (iedatalen < 4) |
1151 | goto cont; |
1152 | |
1153 | iedata = ies + 2; |
1154 | |
1155 | /* check WFA OUI, P2P subtype */ |
1156 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || |
1157 | iedata[2] != 0x9a || iedata[3] != 0x09) |
1158 | goto cont; |
1159 | |
1160 | iedatalen -= 4; |
1161 | iedata += 4; |
1162 | |
1163 | /* check attribute continuation into this IE */ |
1164 | copy = min_t(unsigned int, attr_remaining, iedatalen); |
1165 | if (copy && desired_attr) { |
1166 | desired_len += copy; |
1167 | if (out) { |
1168 | memcpy(out, iedata, min(bufsize, copy)); |
1169 | out += min(bufsize, copy); |
1170 | bufsize -= min(bufsize, copy); |
1171 | } |
1172 | |
1173 | |
1174 | if (copy == attr_remaining) |
1175 | return desired_len; |
1176 | } |
1177 | |
1178 | attr_remaining -= copy; |
1179 | if (attr_remaining) |
1180 | goto cont; |
1181 | |
1182 | iedatalen -= copy; |
1183 | iedata += copy; |
1184 | |
1185 | while (iedatalen > 0) { |
1186 | u16 attr_len; |
1187 | |
1188 | /* P2P attribute ID & size must fit */ |
1189 | if (iedatalen < 3) |
1190 | return -EILSEQ; |
1191 | desired_attr = iedata[0] == attr; |
1192 | attr_len = get_unaligned_le16(iedata + 1); |
1193 | iedatalen -= 3; |
1194 | iedata += 3; |
1195 | |
1196 | copy = min_t(unsigned int, attr_len, iedatalen); |
1197 | |
1198 | if (desired_attr) { |
1199 | desired_len += copy; |
1200 | if (out) { |
1201 | memcpy(out, iedata, min(bufsize, copy)); |
1202 | out += min(bufsize, copy); |
1203 | bufsize -= min(bufsize, copy); |
1204 | } |
1205 | |
1206 | if (copy == attr_len) |
1207 | return desired_len; |
1208 | } |
1209 | |
1210 | iedata += copy; |
1211 | iedatalen -= copy; |
1212 | attr_remaining = attr_len - copy; |
1213 | } |
1214 | |
1215 | cont: |
1216 | len -= ies[1] + 2; |
1217 | ies += ies[1] + 2; |
1218 | } |
1219 | |
1220 | if (attr_remaining && desired_attr) |
1221 | return -EILSEQ; |
1222 | |
1223 | return -ENOENT; |
1224 | } |
1225 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); |
1226 | |
1227 | bool ieee80211_operating_class_to_band(u8 operating_class, |
1228 | enum ieee80211_band *band) |
1229 | { |
1230 | switch (operating_class) { |
1231 | case 112: |
1232 | case 115 ... 127: |
1233 | *band = IEEE80211_BAND_5GHZ; |
1234 | return true; |
1235 | case 81: |
1236 | case 82: |
1237 | case 83: |
1238 | case 84: |
1239 | *band = IEEE80211_BAND_2GHZ; |
1240 | return true; |
1241 | case 180: |
1242 | *band = IEEE80211_BAND_60GHZ; |
1243 | return true; |
1244 | } |
1245 | |
1246 | return false; |
1247 | } |
1248 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); |
1249 | |
1250 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1251 | u32 beacon_int) |
1252 | { |
1253 | struct wireless_dev *wdev; |
1254 | int res = 0; |
1255 | |
1256 | if (!beacon_int) |
1257 | return -EINVAL; |
1258 | |
1259 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
1260 | if (!wdev->beacon_interval) |
1261 | continue; |
1262 | if (wdev->beacon_interval != beacon_int) { |
1263 | res = -EINVAL; |
1264 | break; |
1265 | } |
1266 | } |
1267 | |
1268 | return res; |
1269 | } |
1270 | |
1271 | int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
1272 | struct wireless_dev *wdev, |
1273 | enum nl80211_iftype iftype, |
1274 | struct ieee80211_channel *chan, |
1275 | enum cfg80211_chan_mode chanmode, |
1276 | u8 radar_detect) |
1277 | { |
1278 | struct wireless_dev *wdev_iter; |
1279 | u32 used_iftypes = BIT(iftype); |
1280 | int num[NUM_NL80211_IFTYPES]; |
1281 | struct ieee80211_channel |
1282 | *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; |
1283 | struct ieee80211_channel *ch; |
1284 | enum cfg80211_chan_mode chmode; |
1285 | int num_different_channels = 0; |
1286 | int total = 1; |
1287 | int i, j; |
1288 | |
1289 | ASSERT_RTNL(); |
1290 | |
1291 | if (WARN_ON(hweight32(radar_detect) > 1)) |
1292 | return -EINVAL; |
1293 | |
1294 | if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) |
1295 | return -EINVAL; |
1296 | |
1297 | /* Always allow software iftypes */ |
1298 | if (rdev->wiphy.software_iftypes & BIT(iftype)) { |
1299 | if (radar_detect) |
1300 | return -EINVAL; |
1301 | return 0; |
1302 | } |
1303 | |
1304 | memset(num, 0, sizeof(num)); |
1305 | memset(used_channels, 0, sizeof(used_channels)); |
1306 | |
1307 | num[iftype] = 1; |
1308 | |
1309 | switch (chanmode) { |
1310 | case CHAN_MODE_UNDEFINED: |
1311 | break; |
1312 | case CHAN_MODE_SHARED: |
1313 | WARN_ON(!chan); |
1314 | used_channels[0] = chan; |
1315 | num_different_channels++; |
1316 | break; |
1317 | case CHAN_MODE_EXCLUSIVE: |
1318 | num_different_channels++; |
1319 | break; |
1320 | } |
1321 | |
1322 | list_for_each_entry(wdev_iter, &rdev->wdev_list, list) { |
1323 | if (wdev_iter == wdev) |
1324 | continue; |
1325 | if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) { |
1326 | if (!wdev_iter->p2p_started) |
1327 | continue; |
1328 | } else if (wdev_iter->netdev) { |
1329 | if (!netif_running(wdev_iter->netdev)) |
1330 | continue; |
1331 | } else { |
1332 | WARN_ON(1); |
1333 | } |
1334 | |
1335 | if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) |
1336 | continue; |
1337 | |
1338 | /* |
1339 | * We may be holding the "wdev" mutex, but now need to lock |
1340 | * wdev_iter. This is OK because once we get here wdev_iter |
1341 | * is not wdev (tested above), but we need to use the nested |
1342 | * locking for lockdep. |
1343 | */ |
1344 | mutex_lock_nested(&wdev_iter->mtx, 1); |
1345 | __acquire(wdev_iter->mtx); |
1346 | cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect); |
1347 | wdev_unlock(wdev_iter); |
1348 | |
1349 | switch (chmode) { |
1350 | case CHAN_MODE_UNDEFINED: |
1351 | break; |
1352 | case CHAN_MODE_SHARED: |
1353 | for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) |
1354 | if (!used_channels[i] || used_channels[i] == ch) |
1355 | break; |
1356 | |
1357 | if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
1358 | return -EBUSY; |
1359 | |
1360 | if (used_channels[i] == NULL) { |
1361 | used_channels[i] = ch; |
1362 | num_different_channels++; |
1363 | } |
1364 | break; |
1365 | case CHAN_MODE_EXCLUSIVE: |
1366 | num_different_channels++; |
1367 | break; |
1368 | } |
1369 | |
1370 | num[wdev_iter->iftype]++; |
1371 | total++; |
1372 | used_iftypes |= BIT(wdev_iter->iftype); |
1373 | } |
1374 | |
1375 | if (total == 1 && !radar_detect) |
1376 | return 0; |
1377 | |
1378 | for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) { |
1379 | const struct ieee80211_iface_combination *c; |
1380 | struct ieee80211_iface_limit *limits; |
1381 | u32 all_iftypes = 0; |
1382 | |
1383 | c = &rdev->wiphy.iface_combinations[i]; |
1384 | |
1385 | if (total > c->max_interfaces) |
1386 | continue; |
1387 | if (num_different_channels > c->num_different_channels) |
1388 | continue; |
1389 | |
1390 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
1391 | GFP_KERNEL); |
1392 | if (!limits) |
1393 | return -ENOMEM; |
1394 | |
1395 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
1396 | if (rdev->wiphy.software_iftypes & BIT(iftype)) |
1397 | continue; |
1398 | for (j = 0; j < c->n_limits; j++) { |
1399 | all_iftypes |= limits[j].types; |
1400 | if (!(limits[j].types & BIT(iftype))) |
1401 | continue; |
1402 | if (limits[j].max < num[iftype]) |
1403 | goto cont; |
1404 | limits[j].max -= num[iftype]; |
1405 | } |
1406 | } |
1407 | |
1408 | if (radar_detect && !(c->radar_detect_widths & radar_detect)) |
1409 | goto cont; |
1410 | |
1411 | /* |
1412 | * Finally check that all iftypes that we're currently |
1413 | * using are actually part of this combination. If they |
1414 | * aren't then we can't use this combination and have |
1415 | * to continue to the next. |
1416 | */ |
1417 | if ((all_iftypes & used_iftypes) != used_iftypes) |
1418 | goto cont; |
1419 | |
1420 | /* |
1421 | * This combination covered all interface types and |
1422 | * supported the requested numbers, so we're good. |
1423 | */ |
1424 | kfree(limits); |
1425 | return 0; |
1426 | cont: |
1427 | kfree(limits); |
1428 | } |
1429 | |
1430 | return -EBUSY; |
1431 | } |
1432 | |
1433 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1434 | const u8 *rates, unsigned int n_rates, |
1435 | u32 *mask) |
1436 | { |
1437 | int i, j; |
1438 | |
1439 | if (!sband) |
1440 | return -EINVAL; |
1441 | |
1442 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1443 | return -EINVAL; |
1444 | |
1445 | *mask = 0; |
1446 | |
1447 | for (i = 0; i < n_rates; i++) { |
1448 | int rate = (rates[i] & 0x7f) * 5; |
1449 | bool found = false; |
1450 | |
1451 | for (j = 0; j < sband->n_bitrates; j++) { |
1452 | if (sband->bitrates[j].bitrate == rate) { |
1453 | found = true; |
1454 | *mask |= BIT(j); |
1455 | break; |
1456 | } |
1457 | } |
1458 | if (!found) |
1459 | return -EINVAL; |
1460 | } |
1461 | |
1462 | /* |
1463 | * mask must have at least one bit set here since we |
1464 | * didn't accept a 0-length rates array nor allowed |
1465 | * entries in the array that didn't exist |
1466 | */ |
1467 | |
1468 | return 0; |
1469 | } |
1470 | |
1471 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1472 | { |
1473 | enum ieee80211_band band; |
1474 | unsigned int n_channels = 0; |
1475 | |
1476 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1477 | if (wiphy->bands[band]) |
1478 | n_channels += wiphy->bands[band]->n_channels; |
1479 | |
1480 | return n_channels; |
1481 | } |
1482 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); |
1483 | |
1484 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1485 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
1486 | const unsigned char rfc1042_header[] __aligned(2) = |
1487 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
1488 | EXPORT_SYMBOL(rfc1042_header); |
1489 | |
1490 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
1491 | const unsigned char bridge_tunnel_header[] __aligned(2) = |
1492 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
1493 | EXPORT_SYMBOL(bridge_tunnel_header); |
1494 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9