Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
8318d78a JB |
2 | /* |
3 | * Wireless utility functions | |
4 | * | |
d3236553 | 5 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
c4cbaf79 | 7 | * Copyright 2017 Intel Deutschland GmbH |
1fc9b725 | 8 | * Copyright (C) 2018-2019 Intel Corporation |
8318d78a | 9 | */ |
bc3b2d7f | 10 | #include <linux/export.h> |
d3236553 | 11 | #include <linux/bitops.h> |
e31a16d6 | 12 | #include <linux/etherdevice.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
b0aa75f0 | 14 | #include <linux/ieee80211.h> |
d3236553 | 15 | #include <net/cfg80211.h> |
e31a16d6 | 16 | #include <net/ip.h> |
b156579b | 17 | #include <net/dsfield.h> |
c6ca5e28 | 18 | #include <linux/if_vlan.h> |
960d97f9 | 19 | #include <linux/mpls.h> |
4c8dea63 | 20 | #include <linux/gcd.h> |
b0aa75f0 | 21 | #include <linux/bitfield.h> |
1fc9b725 | 22 | #include <linux/nospec.h> |
8318d78a | 23 | #include "core.h" |
e35e4d28 HG |
24 | #include "rdev-ops.h" |
25 | ||
8318d78a | 26 | |
bd815252 JB |
27 | struct ieee80211_rate * |
28 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 29 | u32 basic_rates, int bitrate) |
bd815252 JB |
30 | { |
31 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
32 | int i; | |
33 | ||
34 | for (i = 0; i < sband->n_bitrates; i++) { | |
35 | if (!(basic_rates & BIT(i))) | |
36 | continue; | |
37 | if (sband->bitrates[i].bitrate > bitrate) | |
38 | continue; | |
39 | result = &sband->bitrates[i]; | |
40 | } | |
41 | ||
42 | return result; | |
43 | } | |
44 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
45 | ||
74608aca SW |
46 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
47 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
48 | { |
49 | struct ieee80211_rate *bitrates; | |
50 | u32 mandatory_rates = 0; | |
51 | enum ieee80211_rate_flags mandatory_flag; | |
52 | int i; | |
53 | ||
54 | if (WARN_ON(!sband)) | |
55 | return 1; | |
56 | ||
57fbcce3 | 57 | if (sband->band == NL80211_BAND_2GHZ) { |
74608aca SW |
58 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
59 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
60 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
61 | else | |
62 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
63 | } else { | |
b422c6cd | 64 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 65 | } |
b422c6cd AN |
66 | |
67 | bitrates = sband->bitrates; | |
68 | for (i = 0; i < sband->n_bitrates; i++) | |
69 | if (bitrates[i].flags & mandatory_flag) | |
70 | mandatory_rates |= BIT(i); | |
71 | return mandatory_rates; | |
72 | } | |
73 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
74 | ||
57fbcce3 | 75 | int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) |
8318d78a | 76 | { |
59eb21a6 BR |
77 | /* see 802.11 17.3.8.3.2 and Annex J |
78 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
79 | if (chan <= 0) |
80 | return 0; /* not supported */ | |
81 | switch (band) { | |
57fbcce3 | 82 | case NL80211_BAND_2GHZ: |
59eb21a6 BR |
83 | if (chan == 14) |
84 | return 2484; | |
85 | else if (chan < 14) | |
86 | return 2407 + chan * 5; | |
3a0c52a6 | 87 | break; |
57fbcce3 | 88 | case NL80211_BAND_5GHZ: |
3a0c52a6 VK |
89 | if (chan >= 182 && chan <= 196) |
90 | return 4000 + chan * 5; | |
59eb21a6 | 91 | else |
3a0c52a6 VK |
92 | return 5000 + chan * 5; |
93 | break; | |
57fbcce3 | 94 | case NL80211_BAND_60GHZ: |
9cf0a0b4 | 95 | if (chan < 7) |
3a0c52a6 VK |
96 | return 56160 + chan * 2160; |
97 | break; | |
98 | default: | |
99 | ; | |
59eb21a6 | 100 | } |
3a0c52a6 | 101 | return 0; /* not supported */ |
8318d78a JB |
102 | } |
103 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
104 | ||
105 | int ieee80211_frequency_to_channel(int freq) | |
106 | { | |
59eb21a6 | 107 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
108 | if (freq == 2484) |
109 | return 14; | |
59eb21a6 | 110 | else if (freq < 2484) |
8318d78a | 111 | return (freq - 2407) / 5; |
59eb21a6 BR |
112 | else if (freq >= 4910 && freq <= 4980) |
113 | return (freq - 4000) / 5; | |
3a0c52a6 | 114 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 115 | return (freq - 5000) / 5; |
9cf0a0b4 | 116 | else if (freq >= 58320 && freq <= 70200) |
3a0c52a6 VK |
117 | return (freq - 56160) / 2160; |
118 | else | |
119 | return 0; | |
8318d78a JB |
120 | } |
121 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
122 | ||
543b921b | 123 | struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq) |
906c730a | 124 | { |
57fbcce3 | 125 | enum nl80211_band band; |
906c730a JB |
126 | struct ieee80211_supported_band *sband; |
127 | int i; | |
128 | ||
57fbcce3 | 129 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
130 | sband = wiphy->bands[band]; |
131 | ||
132 | if (!sband) | |
133 | continue; | |
134 | ||
135 | for (i = 0; i < sband->n_channels; i++) { | |
136 | if (sband->channels[i].center_freq == freq) | |
137 | return &sband->channels[i]; | |
138 | } | |
139 | } | |
140 | ||
141 | return NULL; | |
142 | } | |
543b921b | 143 | EXPORT_SYMBOL(ieee80211_get_channel); |
906c730a | 144 | |
343884c8 | 145 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
8318d78a JB |
146 | { |
147 | int i, want; | |
148 | ||
343884c8 | 149 | switch (sband->band) { |
57fbcce3 | 150 | case NL80211_BAND_5GHZ: |
8318d78a JB |
151 | want = 3; |
152 | for (i = 0; i < sband->n_bitrates; i++) { | |
153 | if (sband->bitrates[i].bitrate == 60 || | |
154 | sband->bitrates[i].bitrate == 120 || | |
155 | sband->bitrates[i].bitrate == 240) { | |
156 | sband->bitrates[i].flags |= | |
157 | IEEE80211_RATE_MANDATORY_A; | |
158 | want--; | |
159 | } | |
160 | } | |
161 | WARN_ON(want); | |
162 | break; | |
57fbcce3 | 163 | case NL80211_BAND_2GHZ: |
8318d78a JB |
164 | want = 7; |
165 | for (i = 0; i < sband->n_bitrates; i++) { | |
1bd773c0 RS |
166 | switch (sband->bitrates[i].bitrate) { |
167 | case 10: | |
168 | case 20: | |
169 | case 55: | |
170 | case 110: | |
8318d78a JB |
171 | sband->bitrates[i].flags |= |
172 | IEEE80211_RATE_MANDATORY_B | | |
173 | IEEE80211_RATE_MANDATORY_G; | |
174 | want--; | |
1bd773c0 RS |
175 | break; |
176 | case 60: | |
177 | case 120: | |
178 | case 240: | |
8318d78a JB |
179 | sband->bitrates[i].flags |= |
180 | IEEE80211_RATE_MANDATORY_G; | |
181 | want--; | |
1bd773c0 RS |
182 | /* fall through */ |
183 | default: | |
8318d78a JB |
184 | sband->bitrates[i].flags |= |
185 | IEEE80211_RATE_ERP_G; | |
1bd773c0 RS |
186 | break; |
187 | } | |
8318d78a | 188 | } |
1bd773c0 | 189 | WARN_ON(want != 0 && want != 3); |
8318d78a | 190 | break; |
57fbcce3 | 191 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
192 | /* check for mandatory HT MCS 1..4 */ |
193 | WARN_ON(!sband->ht_cap.ht_supported); | |
194 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
195 | break; | |
57fbcce3 | 196 | case NUM_NL80211_BANDS: |
343884c8 | 197 | default: |
8318d78a JB |
198 | WARN_ON(1); |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
204 | { | |
57fbcce3 | 205 | enum nl80211_band band; |
8318d78a | 206 | |
57fbcce3 | 207 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a | 208 | if (wiphy->bands[band]) |
343884c8 | 209 | set_mandatory_flags_band(wiphy->bands[band]); |
8318d78a | 210 | } |
08645126 | 211 | |
38ba3c57 JM |
212 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
213 | { | |
214 | int i; | |
215 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
216 | if (cipher == wiphy->cipher_suites[i]) | |
217 | return true; | |
218 | return false; | |
219 | } | |
220 | ||
fffd0934 JB |
221 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
222 | struct key_params *params, int key_idx, | |
e31b8213 | 223 | bool pairwise, const u8 *mac_addr) |
08645126 | 224 | { |
e9c8f8d3 | 225 | if (key_idx < 0 || key_idx > 5) |
08645126 JB |
226 | return -EINVAL; |
227 | ||
e31b8213 JB |
228 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
229 | return -EINVAL; | |
230 | ||
231 | if (pairwise && !mac_addr) | |
232 | return -EINVAL; | |
233 | ||
37720569 JM |
234 | switch (params->cipher) { |
235 | case WLAN_CIPHER_SUITE_TKIP: | |
236 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
237 | case WLAN_CIPHER_SUITE_CCMP_256: |
238 | case WLAN_CIPHER_SUITE_GCMP: | |
239 | case WLAN_CIPHER_SUITE_GCMP_256: | |
6cdd3979 AW |
240 | /* IEEE802.11-2016 allows only 0 and - when using Extended Key |
241 | * ID - 1 as index for pairwise keys. | |
242 | * @NL80211_KEY_NO_TX is only allowed for pairwise keys when | |
243 | * the driver supports Extended Key ID. | |
244 | * @NL80211_KEY_SET_TX can't be set when installing and | |
245 | * validating a key. | |
37720569 | 246 | */ |
6cdd3979 AW |
247 | if (params->mode == NL80211_KEY_NO_TX) { |
248 | if (!wiphy_ext_feature_isset(&rdev->wiphy, | |
249 | NL80211_EXT_FEATURE_EXT_KEY_ID)) | |
250 | return -EINVAL; | |
251 | else if (!pairwise || key_idx < 0 || key_idx > 1) | |
252 | return -EINVAL; | |
253 | } else if ((pairwise && key_idx) || | |
254 | params->mode == NL80211_KEY_SET_TX) { | |
37720569 | 255 | return -EINVAL; |
6cdd3979 | 256 | } |
37720569 JM |
257 | break; |
258 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
259 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
260 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
261 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
262 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
263 | if (pairwise) | |
264 | return -EINVAL; | |
e9c8f8d3 JB |
265 | if (key_idx < 4) |
266 | return -EINVAL; | |
37720569 | 267 | break; |
e9c8f8d3 JB |
268 | case WLAN_CIPHER_SUITE_WEP40: |
269 | case WLAN_CIPHER_SUITE_WEP104: | |
270 | if (key_idx > 3) | |
271 | return -EINVAL; | |
37720569 JM |
272 | default: |
273 | break; | |
274 | } | |
08645126 | 275 | |
08645126 JB |
276 | switch (params->cipher) { |
277 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 278 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
279 | return -EINVAL; |
280 | break; | |
281 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 282 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
283 | return -EINVAL; |
284 | break; | |
285 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 286 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
287 | return -EINVAL; |
288 | break; | |
cfcf1682 JM |
289 | case WLAN_CIPHER_SUITE_CCMP_256: |
290 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
291 | return -EINVAL; | |
292 | break; | |
293 | case WLAN_CIPHER_SUITE_GCMP: | |
294 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
295 | return -EINVAL; | |
296 | break; | |
297 | case WLAN_CIPHER_SUITE_GCMP_256: | |
298 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
299 | return -EINVAL; | |
300 | break; | |
08645126 | 301 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 302 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
303 | return -EINVAL; |
304 | break; | |
305 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 306 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
307 | return -EINVAL; |
308 | break; | |
cfcf1682 JM |
309 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
310 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
311 | return -EINVAL; | |
312 | break; | |
313 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
314 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
315 | return -EINVAL; | |
316 | break; | |
317 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
318 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
319 | return -EINVAL; | |
320 | break; | |
08645126 | 321 | default: |
7d64b7cc JB |
322 | /* |
323 | * We don't know anything about this algorithm, | |
324 | * allow using it -- but the driver must check | |
325 | * all parameters! We still check below whether | |
326 | * or not the driver supports this algorithm, | |
327 | * of course. | |
328 | */ | |
329 | break; | |
08645126 JB |
330 | } |
331 | ||
9f26a952 JM |
332 | if (params->seq) { |
333 | switch (params->cipher) { | |
334 | case WLAN_CIPHER_SUITE_WEP40: | |
335 | case WLAN_CIPHER_SUITE_WEP104: | |
336 | /* These ciphers do not use key sequence */ | |
337 | return -EINVAL; | |
338 | case WLAN_CIPHER_SUITE_TKIP: | |
339 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
340 | case WLAN_CIPHER_SUITE_CCMP_256: |
341 | case WLAN_CIPHER_SUITE_GCMP: | |
342 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 343 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
344 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
345 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
346 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
347 | if (params->seq_len != 6) |
348 | return -EINVAL; | |
349 | break; | |
350 | } | |
351 | } | |
352 | ||
38ba3c57 | 353 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
354 | return -EINVAL; |
355 | ||
08645126 JB |
356 | return 0; |
357 | } | |
e31a16d6 | 358 | |
633adf1a | 359 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
360 | { |
361 | unsigned int hdrlen = 24; | |
362 | ||
363 | if (ieee80211_is_data(fc)) { | |
364 | if (ieee80211_has_a4(fc)) | |
365 | hdrlen = 30; | |
d0dd2de0 | 366 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 367 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
368 | if (ieee80211_has_order(fc)) |
369 | hdrlen += IEEE80211_HT_CTL_LEN; | |
370 | } | |
e31a16d6 ZY |
371 | goto out; |
372 | } | |
373 | ||
fb142f4b FC |
374 | if (ieee80211_is_mgmt(fc)) { |
375 | if (ieee80211_has_order(fc)) | |
376 | hdrlen += IEEE80211_HT_CTL_LEN; | |
377 | goto out; | |
378 | } | |
379 | ||
e31a16d6 ZY |
380 | if (ieee80211_is_ctl(fc)) { |
381 | /* | |
382 | * ACK and CTS are 10 bytes, all others 16. To see how | |
383 | * to get this condition consider | |
384 | * subtype mask: 0b0000000011110000 (0x00F0) | |
385 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
386 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
387 | * bits that matter: ^^^ (0x00E0) | |
388 | * value of those: 0b0000000011000000 (0x00C0) | |
389 | */ | |
390 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
391 | hdrlen = 10; | |
392 | else | |
393 | hdrlen = 16; | |
394 | } | |
395 | out: | |
396 | return hdrlen; | |
397 | } | |
398 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
399 | ||
400 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
401 | { | |
402 | const struct ieee80211_hdr *hdr = | |
403 | (const struct ieee80211_hdr *)skb->data; | |
404 | unsigned int hdrlen; | |
405 | ||
406 | if (unlikely(skb->len < 10)) | |
407 | return 0; | |
408 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
409 | if (unlikely(hdrlen > skb->len)) | |
410 | return 0; | |
411 | return hdrlen; | |
412 | } | |
413 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
414 | ||
2d1c304c | 415 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 416 | { |
2d1c304c | 417 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 418 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 419 | switch (ae) { |
7dd111e8 | 420 | default: |
e31a16d6 ZY |
421 | case 0: |
422 | return 6; | |
3c5772a5 | 423 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 424 | return 12; |
3c5772a5 | 425 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 426 | return 18; |
e31a16d6 ZY |
427 | } |
428 | } | |
2d1c304c FF |
429 | |
430 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
431 | { | |
432 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
433 | } | |
9b395bc3 | 434 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 435 | |
7f6990c8 | 436 | int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
24bba078 FF |
437 | const u8 *addr, enum nl80211_iftype iftype, |
438 | u8 data_offset) | |
e31a16d6 ZY |
439 | { |
440 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
441 | struct { |
442 | u8 hdr[ETH_ALEN] __aligned(2); | |
443 | __be16 proto; | |
444 | } payload; | |
445 | struct ethhdr tmp; | |
446 | u16 hdrlen; | |
447 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
448 | |
449 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
450 | return -1; | |
451 | ||
24bba078 | 452 | hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; |
2d1c304c FF |
453 | if (skb->len < hdrlen + 8) |
454 | return -1; | |
e31a16d6 ZY |
455 | |
456 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
457 | * header | |
458 | * IEEE 802.11 address fields: | |
459 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
460 | * 0 0 DA SA BSSID n/a | |
461 | * 0 1 DA BSSID SA n/a | |
462 | * 1 0 BSSID SA DA n/a | |
463 | * 1 1 RA TA DA SA | |
464 | */ | |
2d1c304c FF |
465 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
466 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
467 | ||
468 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
469 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 | 470 | |
5667c86a RM |
471 | mesh_flags &= MESH_FLAGS_AE; |
472 | ||
e31a16d6 ZY |
473 | switch (hdr->frame_control & |
474 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
475 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
476 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
477 | iftype != NL80211_IFTYPE_AP_VLAN && |
478 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
479 | return -1; |
480 | break; | |
481 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
482 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
483 | iftype != NL80211_IFTYPE_MESH_POINT && |
484 | iftype != NL80211_IFTYPE_AP_VLAN && | |
485 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
486 | return -1; |
487 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
5667c86a | 488 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f | 489 | return -1; |
5667c86a | 490 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
491 | skb_copy_bits(skb, hdrlen + |
492 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 493 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 494 | } |
2d1c304c | 495 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
496 | } |
497 | break; | |
498 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 499 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
500 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
501 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
502 | (is_multicast_ether_addr(tmp.h_dest) && |
503 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 504 | return -1; |
3c5772a5 | 505 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
5667c86a | 506 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 507 | return -1; |
5667c86a | 508 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
509 | skb_copy_bits(skb, hdrlen + |
510 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
511 | tmp.h_source, ETH_ALEN); |
512 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 513 | } |
e31a16d6 ZY |
514 | break; |
515 | case cpu_to_le16(0): | |
941c93cd | 516 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
517 | iftype != NL80211_IFTYPE_STATION && |
518 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 519 | return -1; |
e31a16d6 ZY |
520 | break; |
521 | } | |
522 | ||
2d1c304c FF |
523 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
524 | tmp.h_proto = payload.proto; | |
e31a16d6 | 525 | |
2d1c304c FF |
526 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
527 | tmp.h_proto != htons(ETH_P_AARP) && | |
528 | tmp.h_proto != htons(ETH_P_IPX)) || | |
529 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
530 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
531 | * replace EtherType */ | |
2d1c304c FF |
532 | hdrlen += ETH_ALEN + 2; |
533 | else | |
c041778c | 534 | tmp.h_proto = htons(skb->len - hdrlen); |
2d1c304c FF |
535 | |
536 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 537 | |
2d1c304c | 538 | if (!ehdr) |
d58ff351 | 539 | ehdr = skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
540 | memcpy(ehdr, &tmp, sizeof(tmp)); |
541 | ||
e31a16d6 ZY |
542 | return 0; |
543 | } | |
7f6990c8 | 544 | EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
e31a16d6 | 545 | |
2b67f944 FF |
546 | static void |
547 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
548 | void *ptr, int len, int size) | |
549 | { | |
550 | struct skb_shared_info *sh = skb_shinfo(skb); | |
551 | int page_offset; | |
552 | ||
6d061f9f | 553 | page_ref_inc(page); |
2b67f944 FF |
554 | page_offset = ptr - page_address(page); |
555 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
556 | } | |
557 | ||
558 | static void | |
559 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
560 | int offset, int len) | |
561 | { | |
562 | struct skb_shared_info *sh = skb_shinfo(skb); | |
aa1702dd | 563 | const skb_frag_t *frag = &sh->frags[0]; |
2b67f944 FF |
564 | struct page *frag_page; |
565 | void *frag_ptr; | |
566 | int frag_len, frag_size; | |
567 | int head_size = skb->len - skb->data_len; | |
568 | int cur_len; | |
569 | ||
570 | frag_page = virt_to_head_page(skb->head); | |
571 | frag_ptr = skb->data; | |
572 | frag_size = head_size; | |
573 | ||
574 | while (offset >= frag_size) { | |
575 | offset -= frag_size; | |
2b67f944 FF |
576 | frag_page = skb_frag_page(frag); |
577 | frag_ptr = skb_frag_address(frag); | |
578 | frag_size = skb_frag_size(frag); | |
aa1702dd | 579 | frag++; |
2b67f944 FF |
580 | } |
581 | ||
582 | frag_ptr += offset; | |
583 | frag_len = frag_size - offset; | |
584 | ||
585 | cur_len = min(len, frag_len); | |
586 | ||
587 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
588 | len -= cur_len; | |
589 | ||
590 | while (len > 0) { | |
2b67f944 FF |
591 | frag_len = skb_frag_size(frag); |
592 | cur_len = min(len, frag_len); | |
593 | __frame_add_frag(frame, skb_frag_page(frag), | |
594 | skb_frag_address(frag), cur_len, frag_len); | |
595 | len -= cur_len; | |
aa1702dd | 596 | frag++; |
2b67f944 FF |
597 | } |
598 | } | |
599 | ||
230fd28a FF |
600 | static struct sk_buff * |
601 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 602 | int offset, int len, bool reuse_frag) |
230fd28a FF |
603 | { |
604 | struct sk_buff *frame; | |
2b67f944 | 605 | int cur_len = len; |
230fd28a FF |
606 | |
607 | if (skb->len - offset < len) | |
608 | return NULL; | |
609 | ||
2b67f944 FF |
610 | /* |
611 | * When reusing framents, copy some data to the head to simplify | |
612 | * ethernet header handling and speed up protocol header processing | |
613 | * in the stack later. | |
614 | */ | |
615 | if (reuse_frag) | |
616 | cur_len = min_t(int, len, 32); | |
617 | ||
230fd28a FF |
618 | /* |
619 | * Allocate and reserve two bytes more for payload | |
620 | * alignment since sizeof(struct ethhdr) is 14. | |
621 | */ | |
2b67f944 | 622 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
16a910a6 GG |
623 | if (!frame) |
624 | return NULL; | |
230fd28a FF |
625 | |
626 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
627 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
628 | ||
629 | len -= cur_len; | |
630 | if (!len) | |
631 | return frame; | |
632 | ||
633 | offset += cur_len; | |
634 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
635 | |
636 | return frame; | |
637 | } | |
eaf85ca7 ZY |
638 | |
639 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
640 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad | 641 | const unsigned int extra_headroom, |
8b935ee2 | 642 | const u8 *check_da, const u8 *check_sa) |
eaf85ca7 | 643 | { |
230fd28a | 644 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
645 | struct sk_buff *frame = NULL; |
646 | u16 ethertype; | |
647 | u8 *payload; | |
7f6990c8 | 648 | int offset = 0, remaining; |
230fd28a | 649 | struct ethhdr eth; |
2b67f944 | 650 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 651 | bool reuse_skb = false; |
230fd28a | 652 | bool last = false; |
88665f5a | 653 | |
230fd28a FF |
654 | while (!last) { |
655 | unsigned int subframe_len; | |
656 | int len; | |
eaf85ca7 | 657 | u8 padding; |
eaf85ca7 | 658 | |
230fd28a FF |
659 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
660 | len = ntohs(eth.h_proto); | |
661 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 662 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 663 | |
eaf85ca7 | 664 | /* the last MSDU has no padding */ |
230fd28a | 665 | remaining = skb->len - offset; |
eaf85ca7 ZY |
666 | if (subframe_len > remaining) |
667 | goto purge; | |
668 | ||
230fd28a | 669 | offset += sizeof(struct ethhdr); |
230fd28a | 670 | last = remaining <= subframe_len + padding; |
8b935ee2 JB |
671 | |
672 | /* FIXME: should we really accept multicast DA? */ | |
673 | if ((check_da && !is_multicast_ether_addr(eth.h_dest) && | |
674 | !ether_addr_equal(check_da, eth.h_dest)) || | |
675 | (check_sa && !ether_addr_equal(check_sa, eth.h_source))) { | |
676 | offset += len + padding; | |
677 | continue; | |
678 | } | |
679 | ||
680 | /* reuse skb for the last subframe */ | |
2b67f944 | 681 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 682 | skb_pull(skb, offset); |
eaf85ca7 | 683 | frame = skb; |
230fd28a FF |
684 | reuse_skb = true; |
685 | } else { | |
2b67f944 FF |
686 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
687 | reuse_frag); | |
eaf85ca7 ZY |
688 | if (!frame) |
689 | goto purge; | |
690 | ||
230fd28a | 691 | offset += len + padding; |
eaf85ca7 ZY |
692 | } |
693 | ||
694 | skb_reset_network_header(frame); | |
695 | frame->dev = skb->dev; | |
696 | frame->priority = skb->priority; | |
697 | ||
698 | payload = frame->data; | |
699 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 700 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 701 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 702 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
703 | eth.h_proto = htons(ethertype); |
704 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 705 | } |
230fd28a FF |
706 | |
707 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
708 | __skb_queue_tail(list, frame); |
709 | } | |
710 | ||
230fd28a FF |
711 | if (!reuse_skb) |
712 | dev_kfree_skb(skb); | |
713 | ||
eaf85ca7 ZY |
714 | return; |
715 | ||
716 | purge: | |
717 | __skb_queue_purge(list); | |
eaf85ca7 ZY |
718 | dev_kfree_skb(skb); |
719 | } | |
720 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
721 | ||
e31a16d6 | 722 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
723 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
724 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
725 | { |
726 | unsigned int dscp; | |
c6ca5e28 | 727 | unsigned char vlan_priority; |
1fc9b725 | 728 | unsigned int ret; |
e31a16d6 ZY |
729 | |
730 | /* skb->priority values from 256->263 are magic values to | |
731 | * directly indicate a specific 802.1d priority. This is used | |
732 | * to allow 802.1d priority to be passed directly in from VLAN | |
733 | * tags, etc. | |
734 | */ | |
1fc9b725 JB |
735 | if (skb->priority >= 256 && skb->priority <= 263) { |
736 | ret = skb->priority - 256; | |
737 | goto out; | |
738 | } | |
e31a16d6 | 739 | |
df8a39de JP |
740 | if (skb_vlan_tag_present(skb)) { |
741 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 | 742 | >> VLAN_PRIO_SHIFT; |
1fc9b725 JB |
743 | if (vlan_priority > 0) { |
744 | ret = vlan_priority; | |
745 | goto out; | |
746 | } | |
c6ca5e28 V |
747 | } |
748 | ||
e31a16d6 ZY |
749 | switch (skb->protocol) { |
750 | case htons(ETH_P_IP): | |
b156579b DT |
751 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
752 | break; | |
753 | case htons(ETH_P_IPV6): | |
754 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 755 | break; |
960d97f9 SW |
756 | case htons(ETH_P_MPLS_UC): |
757 | case htons(ETH_P_MPLS_MC): { | |
758 | struct mpls_label mpls_tmp, *mpls; | |
759 | ||
760 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
761 | sizeof(*mpls), &mpls_tmp); | |
762 | if (!mpls) | |
763 | return 0; | |
764 | ||
1fc9b725 | 765 | ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) |
960d97f9 | 766 | >> MPLS_LS_TC_SHIFT; |
1fc9b725 | 767 | goto out; |
960d97f9 SW |
768 | } |
769 | case htons(ETH_P_80221): | |
770 | /* 802.21 is always network control traffic */ | |
771 | return 7; | |
e31a16d6 ZY |
772 | default: |
773 | return 0; | |
774 | } | |
775 | ||
fa9ffc74 KP |
776 | if (qos_map) { |
777 | unsigned int i, tmp_dscp = dscp >> 2; | |
778 | ||
779 | for (i = 0; i < qos_map->num_des; i++) { | |
1fc9b725 JB |
780 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) { |
781 | ret = qos_map->dscp_exception[i].up; | |
782 | goto out; | |
783 | } | |
fa9ffc74 KP |
784 | } |
785 | ||
786 | for (i = 0; i < 8; i++) { | |
787 | if (tmp_dscp >= qos_map->up[i].low && | |
1fc9b725 JB |
788 | tmp_dscp <= qos_map->up[i].high) { |
789 | ret = i; | |
790 | goto out; | |
791 | } | |
fa9ffc74 KP |
792 | } |
793 | } | |
794 | ||
1fc9b725 JB |
795 | ret = dscp >> 5; |
796 | out: | |
797 | return array_index_nospec(ret, IEEE80211_NUM_TIDS); | |
e31a16d6 ZY |
798 | } |
799 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 | 800 | |
49a68e0d | 801 | const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) |
517357c6 | 802 | { |
9caf0364 JB |
803 | const struct cfg80211_bss_ies *ies; |
804 | ||
805 | ies = rcu_dereference(bss->ies); | |
806 | if (!ies) | |
517357c6 | 807 | return NULL; |
9caf0364 | 808 | |
49a68e0d | 809 | return cfg80211_find_elem(id, ies->data, ies->len); |
517357c6 | 810 | } |
49a68e0d | 811 | EXPORT_SYMBOL(ieee80211_bss_get_elem); |
fffd0934 JB |
812 | |
813 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
814 | { | |
f26cbf40 | 815 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
816 | struct net_device *dev = wdev->netdev; |
817 | int i; | |
818 | ||
819 | if (!wdev->connect_keys) | |
820 | return; | |
821 | ||
b8676221 | 822 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
fffd0934 JB |
823 | if (!wdev->connect_keys->params[i].cipher) |
824 | continue; | |
e35e4d28 HG |
825 | if (rdev_add_key(rdev, dev, i, false, NULL, |
826 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 827 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
828 | continue; |
829 | } | |
d4f29978 JB |
830 | if (wdev->connect_keys->def == i && |
831 | rdev_set_default_key(rdev, dev, i, true, true)) { | |
832 | netdev_err(dev, "failed to set defkey %d\n", i); | |
833 | continue; | |
834 | } | |
fffd0934 JB |
835 | } |
836 | ||
b47f610b | 837 | kzfree(wdev->connect_keys); |
fffd0934 JB |
838 | wdev->connect_keys = NULL; |
839 | } | |
3d54d255 | 840 | |
1f6fc43e | 841 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
842 | { |
843 | struct cfg80211_event *ev; | |
844 | unsigned long flags; | |
3d54d255 JB |
845 | |
846 | spin_lock_irqsave(&wdev->event_lock, flags); | |
847 | while (!list_empty(&wdev->event_list)) { | |
848 | ev = list_first_entry(&wdev->event_list, | |
849 | struct cfg80211_event, list); | |
850 | list_del(&ev->list); | |
851 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
852 | ||
853 | wdev_lock(wdev); | |
854 | switch (ev->type) { | |
855 | case EVENT_CONNECT_RESULT: | |
3d54d255 | 856 | __cfg80211_connect_result( |
5349a0f7 VK |
857 | wdev->netdev, |
858 | &ev->cr, | |
859 | ev->cr.status == WLAN_STATUS_SUCCESS); | |
3d54d255 JB |
860 | break; |
861 | case EVENT_ROAMED: | |
29ce6ecb | 862 | __cfg80211_roamed(wdev, &ev->rm); |
3d54d255 JB |
863 | break; |
864 | case EVENT_DISCONNECTED: | |
865 | __cfg80211_disconnected(wdev->netdev, | |
866 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
867 | ev->dc.reason, |
868 | !ev->dc.locally_generated); | |
3d54d255 JB |
869 | break; |
870 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
871 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
872 | ev->ij.channel); | |
3d54d255 | 873 | break; |
f04c2203 MK |
874 | case EVENT_STOPPED: |
875 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
876 | break; | |
503c1fb9 AS |
877 | case EVENT_PORT_AUTHORIZED: |
878 | __cfg80211_port_authorized(wdev, ev->pa.bssid); | |
879 | break; | |
3d54d255 JB |
880 | } |
881 | wdev_unlock(wdev); | |
882 | ||
883 | kfree(ev); | |
884 | ||
885 | spin_lock_irqsave(&wdev->event_lock, flags); | |
886 | } | |
887 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
888 | } | |
889 | ||
890 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
891 | { | |
892 | struct wireless_dev *wdev; | |
893 | ||
894 | ASSERT_RTNL(); | |
3d54d255 | 895 | |
53873f13 | 896 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 897 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
898 | } |
899 | ||
900 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
901 | struct net_device *dev, enum nl80211_iftype ntype, | |
818a986e | 902 | struct vif_params *params) |
3d54d255 JB |
903 | { |
904 | int err; | |
905 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
906 | ||
73fb08e2 | 907 | ASSERT_RTNL(); |
3d54d255 JB |
908 | |
909 | /* don't support changing VLANs, you just re-create them */ | |
910 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
911 | return -EOPNOTSUPP; | |
912 | ||
cb3b7d87 AB |
913 | /* cannot change into P2P device or NAN */ |
914 | if (ntype == NL80211_IFTYPE_P2P_DEVICE || | |
915 | ntype == NL80211_IFTYPE_NAN) | |
98104fde JB |
916 | return -EOPNOTSUPP; |
917 | ||
3d54d255 JB |
918 | if (!rdev->ops->change_virtual_intf || |
919 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
920 | return -EOPNOTSUPP; | |
921 | ||
ad4bb6f8 | 922 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 923 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
924 | (ntype == NL80211_IFTYPE_ADHOC || |
925 | ntype == NL80211_IFTYPE_STATION || | |
926 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
927 | return -EBUSY; |
928 | ||
6cbfb1bb | 929 | if (ntype != otype) { |
9bc383de | 930 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 931 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 932 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 933 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 934 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 935 | |
3d54d255 | 936 | switch (otype) { |
ac800140 | 937 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 938 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 939 | break; |
3d54d255 JB |
940 | case NL80211_IFTYPE_ADHOC: |
941 | cfg80211_leave_ibss(rdev, dev, false); | |
942 | break; | |
943 | case NL80211_IFTYPE_STATION: | |
074ac8df | 944 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 945 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
946 | cfg80211_disconnect(rdev, dev, |
947 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 948 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
949 | break; |
950 | case NL80211_IFTYPE_MESH_POINT: | |
951 | /* mesh should be handled? */ | |
952 | break; | |
953 | default: | |
954 | break; | |
955 | } | |
956 | ||
957 | cfg80211_process_rdev_events(rdev); | |
958 | } | |
959 | ||
818a986e | 960 | err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
3d54d255 JB |
961 | |
962 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
963 | ||
9bc383de JB |
964 | if (!err && params && params->use_4addr != -1) |
965 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
966 | ||
ad4bb6f8 JB |
967 | if (!err) { |
968 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
969 | switch (ntype) { | |
970 | case NL80211_IFTYPE_STATION: | |
971 | if (dev->ieee80211_ptr->use_4addr) | |
972 | break; | |
973 | /* fall through */ | |
6e0bd6c3 | 974 | case NL80211_IFTYPE_OCB: |
074ac8df | 975 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
976 | case NL80211_IFTYPE_ADHOC: |
977 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
978 | break; | |
074ac8df | 979 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
980 | case NL80211_IFTYPE_AP: |
981 | case NL80211_IFTYPE_AP_VLAN: | |
982 | case NL80211_IFTYPE_WDS: | |
983 | case NL80211_IFTYPE_MESH_POINT: | |
984 | /* bridging OK */ | |
985 | break; | |
986 | case NL80211_IFTYPE_MONITOR: | |
987 | /* monitor can't bridge anyway */ | |
988 | break; | |
989 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 990 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
991 | /* not happening */ |
992 | break; | |
98104fde | 993 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 994 | case NL80211_IFTYPE_NAN: |
98104fde JB |
995 | WARN_ON(1); |
996 | break; | |
ad4bb6f8 JB |
997 | } |
998 | } | |
999 | ||
dbbae26a MK |
1000 | if (!err && ntype != otype && netif_running(dev)) { |
1001 | cfg80211_update_iface_num(rdev, ntype, 1); | |
1002 | cfg80211_update_iface_num(rdev, otype, -1); | |
1003 | } | |
1004 | ||
3d54d255 JB |
1005 | return err; |
1006 | } | |
254416aa | 1007 | |
0c1eca4e JB |
1008 | static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
1009 | { | |
1010 | int modulation, streams, bitrate; | |
1011 | ||
1012 | /* the formula below does only work for MCS values smaller than 32 */ | |
1013 | if (WARN_ON_ONCE(rate->mcs >= 32)) | |
1014 | return 0; | |
1015 | ||
1016 | modulation = rate->mcs & 7; | |
1017 | streams = (rate->mcs >> 3) + 1; | |
1018 | ||
1019 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; | |
1020 | ||
1021 | if (modulation < 4) | |
1022 | bitrate *= (modulation + 1); | |
1023 | else if (modulation == 4) | |
1024 | bitrate *= (modulation + 2); | |
1025 | else | |
1026 | bitrate *= (modulation + 3); | |
1027 | ||
1028 | bitrate *= streams; | |
1029 | ||
1030 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1031 | bitrate = (bitrate / 9) * 10; | |
1032 | ||
1033 | /* do NOT round down here */ | |
1034 | return (bitrate + 50000) / 100000; | |
1035 | } | |
1036 | ||
95ddc1fc VK |
1037 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
1038 | { | |
1039 | static const u32 __mcs2bitrate[] = { | |
1040 | /* control PHY */ | |
1041 | [0] = 275, | |
1042 | /* SC PHY */ | |
1043 | [1] = 3850, | |
1044 | [2] = 7700, | |
1045 | [3] = 9625, | |
1046 | [4] = 11550, | |
1047 | [5] = 12512, /* 1251.25 mbps */ | |
1048 | [6] = 15400, | |
1049 | [7] = 19250, | |
1050 | [8] = 23100, | |
1051 | [9] = 25025, | |
1052 | [10] = 30800, | |
1053 | [11] = 38500, | |
1054 | [12] = 46200, | |
1055 | /* OFDM PHY */ | |
1056 | [13] = 6930, | |
1057 | [14] = 8662, /* 866.25 mbps */ | |
1058 | [15] = 13860, | |
1059 | [16] = 17325, | |
1060 | [17] = 20790, | |
1061 | [18] = 27720, | |
1062 | [19] = 34650, | |
1063 | [20] = 41580, | |
1064 | [21] = 45045, | |
1065 | [22] = 51975, | |
1066 | [23] = 62370, | |
1067 | [24] = 67568, /* 6756.75 mbps */ | |
1068 | /* LP-SC PHY */ | |
1069 | [25] = 6260, | |
1070 | [26] = 8340, | |
1071 | [27] = 11120, | |
1072 | [28] = 12510, | |
1073 | [29] = 16680, | |
1074 | [30] = 22240, | |
1075 | [31] = 25030, | |
1076 | }; | |
1077 | ||
1078 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1079 | return 0; | |
1080 | ||
1081 | return __mcs2bitrate[rate->mcs]; | |
1082 | } | |
1083 | ||
db9c64cf JB |
1084 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1085 | { | |
1086 | static const u32 base[4][10] = { | |
1087 | { 6500000, | |
1088 | 13000000, | |
1089 | 19500000, | |
1090 | 26000000, | |
1091 | 39000000, | |
1092 | 52000000, | |
1093 | 58500000, | |
1094 | 65000000, | |
1095 | 78000000, | |
8fdd136f PT |
1096 | /* not in the spec, but some devices use this: */ |
1097 | 86500000, | |
db9c64cf JB |
1098 | }, |
1099 | { 13500000, | |
1100 | 27000000, | |
1101 | 40500000, | |
1102 | 54000000, | |
1103 | 81000000, | |
1104 | 108000000, | |
1105 | 121500000, | |
1106 | 135000000, | |
1107 | 162000000, | |
1108 | 180000000, | |
1109 | }, | |
1110 | { 29300000, | |
1111 | 58500000, | |
1112 | 87800000, | |
1113 | 117000000, | |
1114 | 175500000, | |
1115 | 234000000, | |
1116 | 263300000, | |
1117 | 292500000, | |
1118 | 351000000, | |
1119 | 390000000, | |
1120 | }, | |
1121 | { 58500000, | |
1122 | 117000000, | |
1123 | 175500000, | |
1124 | 234000000, | |
1125 | 351000000, | |
1126 | 468000000, | |
1127 | 526500000, | |
1128 | 585000000, | |
1129 | 702000000, | |
1130 | 780000000, | |
1131 | }, | |
1132 | }; | |
1133 | u32 bitrate; | |
1134 | int idx; | |
1135 | ||
ca8fe250 JB |
1136 | if (rate->mcs > 9) |
1137 | goto warn; | |
db9c64cf | 1138 | |
b51f3bee JB |
1139 | switch (rate->bw) { |
1140 | case RATE_INFO_BW_160: | |
1141 | idx = 3; | |
1142 | break; | |
1143 | case RATE_INFO_BW_80: | |
1144 | idx = 2; | |
1145 | break; | |
1146 | case RATE_INFO_BW_40: | |
1147 | idx = 1; | |
1148 | break; | |
1149 | case RATE_INFO_BW_5: | |
1150 | case RATE_INFO_BW_10: | |
1151 | default: | |
ca8fe250 | 1152 | goto warn; |
b51f3bee JB |
1153 | case RATE_INFO_BW_20: |
1154 | idx = 0; | |
1155 | } | |
db9c64cf JB |
1156 | |
1157 | bitrate = base[idx][rate->mcs]; | |
1158 | bitrate *= rate->nss; | |
1159 | ||
1160 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1161 | bitrate = (bitrate / 9) * 10; | |
1162 | ||
1163 | /* do NOT round down here */ | |
1164 | return (bitrate + 50000) / 100000; | |
ca8fe250 JB |
1165 | warn: |
1166 | WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", | |
1167 | rate->bw, rate->mcs, rate->nss); | |
1168 | return 0; | |
db9c64cf JB |
1169 | } |
1170 | ||
c4cbaf79 LC |
1171 | static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) |
1172 | { | |
1173 | #define SCALE 2048 | |
1174 | u16 mcs_divisors[12] = { | |
1175 | 34133, /* 16.666666... */ | |
1176 | 17067, /* 8.333333... */ | |
1177 | 11378, /* 5.555555... */ | |
1178 | 8533, /* 4.166666... */ | |
1179 | 5689, /* 2.777777... */ | |
1180 | 4267, /* 2.083333... */ | |
1181 | 3923, /* 1.851851... */ | |
1182 | 3413, /* 1.666666... */ | |
1183 | 2844, /* 1.388888... */ | |
1184 | 2560, /* 1.250000... */ | |
1185 | 2276, /* 1.111111... */ | |
1186 | 2048, /* 1.000000... */ | |
1187 | }; | |
1188 | u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; | |
1189 | u32 rates_969[3] = { 480388888, 453700000, 408333333 }; | |
1190 | u32 rates_484[3] = { 229411111, 216666666, 195000000 }; | |
1191 | u32 rates_242[3] = { 114711111, 108333333, 97500000 }; | |
1192 | u32 rates_106[3] = { 40000000, 37777777, 34000000 }; | |
1193 | u32 rates_52[3] = { 18820000, 17777777, 16000000 }; | |
1194 | u32 rates_26[3] = { 9411111, 8888888, 8000000 }; | |
1195 | u64 tmp; | |
1196 | u32 result; | |
1197 | ||
1198 | if (WARN_ON_ONCE(rate->mcs > 11)) | |
1199 | return 0; | |
1200 | ||
1201 | if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) | |
1202 | return 0; | |
1203 | if (WARN_ON_ONCE(rate->he_ru_alloc > | |
1204 | NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) | |
1205 | return 0; | |
1206 | if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) | |
1207 | return 0; | |
1208 | ||
1209 | if (rate->bw == RATE_INFO_BW_160) | |
1210 | result = rates_160M[rate->he_gi]; | |
1211 | else if (rate->bw == RATE_INFO_BW_80 || | |
1212 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1213 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) | |
1214 | result = rates_969[rate->he_gi]; | |
1215 | else if (rate->bw == RATE_INFO_BW_40 || | |
1216 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1217 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) | |
1218 | result = rates_484[rate->he_gi]; | |
1219 | else if (rate->bw == RATE_INFO_BW_20 || | |
1220 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1221 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) | |
1222 | result = rates_242[rate->he_gi]; | |
1223 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1224 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) | |
1225 | result = rates_106[rate->he_gi]; | |
1226 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1227 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) | |
1228 | result = rates_52[rate->he_gi]; | |
1229 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1230 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) | |
1231 | result = rates_26[rate->he_gi]; | |
344c9719 NC |
1232 | else { |
1233 | WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", | |
1234 | rate->bw, rate->he_ru_alloc); | |
c4cbaf79 | 1235 | return 0; |
344c9719 | 1236 | } |
c4cbaf79 LC |
1237 | |
1238 | /* now scale to the appropriate MCS */ | |
1239 | tmp = result; | |
1240 | tmp *= SCALE; | |
1241 | do_div(tmp, mcs_divisors[rate->mcs]); | |
1242 | result = tmp; | |
1243 | ||
1244 | /* and take NSS, DCM into account */ | |
1245 | result = (result * rate->nss) / 8; | |
1246 | if (rate->he_dcm) | |
1247 | result /= 2; | |
1248 | ||
1249 | return result; | |
1250 | } | |
1251 | ||
8eb41c8d | 1252 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa | 1253 | { |
0c1eca4e JB |
1254 | if (rate->flags & RATE_INFO_FLAGS_MCS) |
1255 | return cfg80211_calculate_bitrate_ht(rate); | |
95ddc1fc VK |
1256 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1257 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1258 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1259 | return cfg80211_calculate_bitrate_vht(rate); | |
c4cbaf79 LC |
1260 | if (rate->flags & RATE_INFO_FLAGS_HE_MCS) |
1261 | return cfg80211_calculate_bitrate_he(rate); | |
254416aa | 1262 | |
0c1eca4e | 1263 | return rate->legacy; |
254416aa | 1264 | } |
8097e149 | 1265 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1266 | |
c216e641 AS |
1267 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1268 | enum ieee80211_p2p_attr_id attr, | |
1269 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1270 | { |
1271 | u8 *out = buf; | |
1272 | u16 attr_remaining = 0; | |
1273 | bool desired_attr = false; | |
1274 | u16 desired_len = 0; | |
1275 | ||
1276 | while (len > 0) { | |
1277 | unsigned int iedatalen; | |
1278 | unsigned int copy; | |
1279 | const u8 *iedata; | |
1280 | ||
1281 | if (len < 2) | |
1282 | return -EILSEQ; | |
1283 | iedatalen = ies[1]; | |
1284 | if (iedatalen + 2 > len) | |
1285 | return -EILSEQ; | |
1286 | ||
1287 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1288 | goto cont; | |
1289 | ||
1290 | if (iedatalen < 4) | |
1291 | goto cont; | |
1292 | ||
1293 | iedata = ies + 2; | |
1294 | ||
1295 | /* check WFA OUI, P2P subtype */ | |
1296 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1297 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1298 | goto cont; | |
1299 | ||
1300 | iedatalen -= 4; | |
1301 | iedata += 4; | |
1302 | ||
1303 | /* check attribute continuation into this IE */ | |
1304 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1305 | if (copy && desired_attr) { | |
1306 | desired_len += copy; | |
1307 | if (out) { | |
1308 | memcpy(out, iedata, min(bufsize, copy)); | |
1309 | out += min(bufsize, copy); | |
1310 | bufsize -= min(bufsize, copy); | |
1311 | } | |
1312 | ||
1313 | ||
1314 | if (copy == attr_remaining) | |
1315 | return desired_len; | |
1316 | } | |
1317 | ||
1318 | attr_remaining -= copy; | |
1319 | if (attr_remaining) | |
1320 | goto cont; | |
1321 | ||
1322 | iedatalen -= copy; | |
1323 | iedata += copy; | |
1324 | ||
1325 | while (iedatalen > 0) { | |
1326 | u16 attr_len; | |
1327 | ||
1328 | /* P2P attribute ID & size must fit */ | |
1329 | if (iedatalen < 3) | |
1330 | return -EILSEQ; | |
1331 | desired_attr = iedata[0] == attr; | |
1332 | attr_len = get_unaligned_le16(iedata + 1); | |
1333 | iedatalen -= 3; | |
1334 | iedata += 3; | |
1335 | ||
1336 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1337 | ||
1338 | if (desired_attr) { | |
1339 | desired_len += copy; | |
1340 | if (out) { | |
1341 | memcpy(out, iedata, min(bufsize, copy)); | |
1342 | out += min(bufsize, copy); | |
1343 | bufsize -= min(bufsize, copy); | |
1344 | } | |
1345 | ||
1346 | if (copy == attr_len) | |
1347 | return desired_len; | |
1348 | } | |
1349 | ||
1350 | iedata += copy; | |
1351 | iedatalen -= copy; | |
1352 | attr_remaining = attr_len - copy; | |
1353 | } | |
1354 | ||
1355 | cont: | |
1356 | len -= ies[1] + 2; | |
1357 | ies += ies[1] + 2; | |
1358 | } | |
1359 | ||
1360 | if (attr_remaining && desired_attr) | |
1361 | return -EILSEQ; | |
1362 | ||
1363 | return -ENOENT; | |
1364 | } | |
1365 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1366 | ||
2512b1b1 | 1367 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) |
29464ccc JB |
1368 | { |
1369 | int i; | |
1370 | ||
2512b1b1 LK |
1371 | /* Make sure array values are legal */ |
1372 | if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) | |
1373 | return false; | |
1374 | ||
1375 | i = 0; | |
1376 | while (i < n_ids) { | |
1377 | if (ids[i] == WLAN_EID_EXTENSION) { | |
1378 | if (id_ext && (ids[i + 1] == id)) | |
1379 | return true; | |
1380 | ||
1381 | i += 2; | |
1382 | continue; | |
1383 | } | |
1384 | ||
1385 | if (ids[i] == id && !id_ext) | |
29464ccc | 1386 | return true; |
2512b1b1 LK |
1387 | |
1388 | i++; | |
1389 | } | |
29464ccc JB |
1390 | return false; |
1391 | } | |
1392 | ||
8ac63448 JB |
1393 | static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
1394 | { | |
1395 | /* we assume a validly formed IEs buffer */ | |
1396 | u8 len = ies[pos + 1]; | |
1397 | ||
1398 | pos += 2 + len; | |
1399 | ||
1400 | /* the IE itself must have 255 bytes for fragments to follow */ | |
1401 | if (len < 255) | |
1402 | return pos; | |
1403 | ||
1404 | while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { | |
1405 | len = ies[pos + 1]; | |
1406 | pos += 2 + len; | |
1407 | } | |
1408 | ||
1409 | return pos; | |
1410 | } | |
1411 | ||
29464ccc JB |
1412 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
1413 | const u8 *ids, int n_ids, | |
1414 | const u8 *after_ric, int n_after_ric, | |
1415 | size_t offset) | |
1416 | { | |
1417 | size_t pos = offset; | |
1418 | ||
2512b1b1 LK |
1419 | while (pos < ielen) { |
1420 | u8 ext = 0; | |
1421 | ||
1422 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1423 | ext = 2; | |
1424 | if ((pos + ext) >= ielen) | |
1425 | break; | |
1426 | ||
1427 | if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], | |
1428 | ies[pos] == WLAN_EID_EXTENSION)) | |
1429 | break; | |
1430 | ||
29464ccc | 1431 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { |
8ac63448 | 1432 | pos = skip_ie(ies, ielen, pos); |
29464ccc | 1433 | |
2512b1b1 LK |
1434 | while (pos < ielen) { |
1435 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1436 | ext = 2; | |
1437 | else | |
1438 | ext = 0; | |
1439 | ||
1440 | if ((pos + ext) >= ielen) | |
1441 | break; | |
1442 | ||
1443 | if (!ieee80211_id_in_list(after_ric, | |
1444 | n_after_ric, | |
1445 | ies[pos + ext], | |
1446 | ext == 2)) | |
1447 | pos = skip_ie(ies, ielen, pos); | |
312ca38d JM |
1448 | else |
1449 | break; | |
2512b1b1 | 1450 | } |
29464ccc | 1451 | } else { |
8ac63448 | 1452 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1453 | } |
1454 | } | |
1455 | ||
1456 | return pos; | |
1457 | } | |
1458 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1459 | ||
1ce3e82b | 1460 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1461 | enum nl80211_band *band) |
1ce3e82b JB |
1462 | { |
1463 | switch (operating_class) { | |
1464 | case 112: | |
1465 | case 115 ... 127: | |
954a86ef | 1466 | case 128 ... 130: |
57fbcce3 | 1467 | *band = NL80211_BAND_5GHZ; |
1ce3e82b JB |
1468 | return true; |
1469 | case 81: | |
1470 | case 82: | |
1471 | case 83: | |
1472 | case 84: | |
57fbcce3 | 1473 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1474 | return true; |
55300a13 | 1475 | case 180: |
57fbcce3 | 1476 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1477 | return true; |
1ce3e82b JB |
1478 | } |
1479 | ||
1480 | return false; | |
1481 | } | |
1482 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1483 | ||
a38700dd AN |
1484 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1485 | u8 *op_class) | |
1486 | { | |
1487 | u8 vht_opclass; | |
8442938c | 1488 | u32 freq = chandef->center_freq1; |
a38700dd AN |
1489 | |
1490 | if (freq >= 2412 && freq <= 2472) { | |
1491 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1492 | return false; | |
1493 | ||
1494 | /* 2.407 GHz, channels 1..13 */ | |
1495 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1496 | if (freq > chandef->chan->center_freq) | |
1497 | *op_class = 83; /* HT40+ */ | |
1498 | else | |
1499 | *op_class = 84; /* HT40- */ | |
1500 | } else { | |
1501 | *op_class = 81; | |
1502 | } | |
1503 | ||
1504 | return true; | |
1505 | } | |
1506 | ||
1507 | if (freq == 2484) { | |
1508 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1509 | return false; | |
1510 | ||
1511 | *op_class = 82; /* channel 14 */ | |
1512 | return true; | |
1513 | } | |
1514 | ||
1515 | switch (chandef->width) { | |
1516 | case NL80211_CHAN_WIDTH_80: | |
1517 | vht_opclass = 128; | |
1518 | break; | |
1519 | case NL80211_CHAN_WIDTH_160: | |
1520 | vht_opclass = 129; | |
1521 | break; | |
1522 | case NL80211_CHAN_WIDTH_80P80: | |
1523 | vht_opclass = 130; | |
1524 | break; | |
1525 | case NL80211_CHAN_WIDTH_10: | |
1526 | case NL80211_CHAN_WIDTH_5: | |
1527 | return false; /* unsupported for now */ | |
1528 | default: | |
1529 | vht_opclass = 0; | |
1530 | break; | |
1531 | } | |
1532 | ||
1533 | /* 5 GHz, channels 36..48 */ | |
1534 | if (freq >= 5180 && freq <= 5240) { | |
1535 | if (vht_opclass) { | |
1536 | *op_class = vht_opclass; | |
1537 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1538 | if (freq > chandef->chan->center_freq) | |
1539 | *op_class = 116; | |
1540 | else | |
1541 | *op_class = 117; | |
1542 | } else { | |
1543 | *op_class = 115; | |
1544 | } | |
1545 | ||
1546 | return true; | |
1547 | } | |
1548 | ||
1549 | /* 5 GHz, channels 52..64 */ | |
1550 | if (freq >= 5260 && freq <= 5320) { | |
1551 | if (vht_opclass) { | |
1552 | *op_class = vht_opclass; | |
1553 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1554 | if (freq > chandef->chan->center_freq) | |
1555 | *op_class = 119; | |
1556 | else | |
1557 | *op_class = 120; | |
1558 | } else { | |
1559 | *op_class = 118; | |
1560 | } | |
1561 | ||
1562 | return true; | |
1563 | } | |
1564 | ||
1565 | /* 5 GHz, channels 100..144 */ | |
1566 | if (freq >= 5500 && freq <= 5720) { | |
1567 | if (vht_opclass) { | |
1568 | *op_class = vht_opclass; | |
1569 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1570 | if (freq > chandef->chan->center_freq) | |
1571 | *op_class = 122; | |
1572 | else | |
1573 | *op_class = 123; | |
1574 | } else { | |
1575 | *op_class = 121; | |
1576 | } | |
1577 | ||
1578 | return true; | |
1579 | } | |
1580 | ||
1581 | /* 5 GHz, channels 149..169 */ | |
1582 | if (freq >= 5745 && freq <= 5845) { | |
1583 | if (vht_opclass) { | |
1584 | *op_class = vht_opclass; | |
1585 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1586 | if (freq > chandef->chan->center_freq) | |
1587 | *op_class = 126; | |
1588 | else | |
1589 | *op_class = 127; | |
1590 | } else if (freq <= 5805) { | |
1591 | *op_class = 124; | |
1592 | } else { | |
1593 | *op_class = 125; | |
1594 | } | |
1595 | ||
1596 | return true; | |
1597 | } | |
1598 | ||
1599 | /* 56.16 GHz, channel 1..4 */ | |
9cf0a0b4 | 1600 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { |
a38700dd AN |
1601 | if (chandef->width >= NL80211_CHAN_WIDTH_40) |
1602 | return false; | |
1603 | ||
1604 | *op_class = 180; | |
1605 | return true; | |
1606 | } | |
1607 | ||
1608 | /* not supported yet */ | |
1609 | return false; | |
1610 | } | |
1611 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1612 | ||
4c8dea63 JB |
1613 | static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
1614 | u32 *beacon_int_gcd, | |
1615 | bool *beacon_int_different) | |
56d1893d JB |
1616 | { |
1617 | struct wireless_dev *wdev; | |
56d1893d | 1618 | |
4c8dea63 JB |
1619 | *beacon_int_gcd = 0; |
1620 | *beacon_int_different = false; | |
56d1893d | 1621 | |
4c8dea63 | 1622 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
56d1893d JB |
1623 | if (!wdev->beacon_interval) |
1624 | continue; | |
0c317a02 | 1625 | |
4c8dea63 JB |
1626 | if (!*beacon_int_gcd) { |
1627 | *beacon_int_gcd = wdev->beacon_interval; | |
0c317a02 | 1628 | continue; |
4c8dea63 | 1629 | } |
0c317a02 | 1630 | |
4c8dea63 | 1631 | if (wdev->beacon_interval == *beacon_int_gcd) |
0c317a02 PK |
1632 | continue; |
1633 | ||
4c8dea63 JB |
1634 | *beacon_int_different = true; |
1635 | *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); | |
1636 | } | |
0c317a02 | 1637 | |
4c8dea63 JB |
1638 | if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
1639 | if (*beacon_int_gcd) | |
1640 | *beacon_int_different = true; | |
1641 | *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); | |
56d1893d | 1642 | } |
4c8dea63 | 1643 | } |
56d1893d | 1644 | |
4c8dea63 JB |
1645 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1646 | enum nl80211_iftype iftype, u32 beacon_int) | |
1647 | { | |
1648 | /* | |
1649 | * This is just a basic pre-condition check; if interface combinations | |
1650 | * are possible the driver must already be checking those with a call | |
1651 | * to cfg80211_check_combinations(), in which case we'll validate more | |
1652 | * through the cfg80211_calculate_bi_data() call and code in | |
1653 | * cfg80211_iter_combinations(). | |
1654 | */ | |
1655 | ||
1656 | if (beacon_int < 10 || beacon_int > 10000) | |
1657 | return -EINVAL; | |
1658 | ||
1659 | return 0; | |
56d1893d | 1660 | } |
7527a782 | 1661 | |
65a124dd | 1662 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
e227300c | 1663 | struct iface_combination_params *params, |
65a124dd MK |
1664 | void (*iter)(const struct ieee80211_iface_combination *c, |
1665 | void *data), | |
1666 | void *data) | |
cb2d956d | 1667 | { |
8c48b50a FF |
1668 | const struct ieee80211_regdomain *regdom; |
1669 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1670 | int i, j, iftype; |
1671 | int num_interfaces = 0; | |
1672 | u32 used_iftypes = 0; | |
4c8dea63 JB |
1673 | u32 beacon_int_gcd; |
1674 | bool beacon_int_different; | |
1675 | ||
1676 | /* | |
1677 | * This is a bit strange, since the iteration used to rely only on | |
1678 | * the data given by the driver, but here it now relies on context, | |
1679 | * in form of the currently operating interfaces. | |
1680 | * This is OK for all current users, and saves us from having to | |
1681 | * push the GCD calculations into all the drivers. | |
1682 | * In the future, this should probably rely more on data that's in | |
1683 | * cfg80211 already - the only thing not would appear to be any new | |
1684 | * interfaces (while being brought up) and channel/radar data. | |
1685 | */ | |
1686 | cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, | |
1687 | &beacon_int_gcd, &beacon_int_different); | |
cb2d956d | 1688 | |
e227300c | 1689 | if (params->radar_detect) { |
8c48b50a FF |
1690 | rcu_read_lock(); |
1691 | regdom = rcu_dereference(cfg80211_regdomain); | |
1692 | if (regdom) | |
1693 | region = regdom->dfs_region; | |
1694 | rcu_read_unlock(); | |
1695 | } | |
1696 | ||
cb2d956d | 1697 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
e227300c PK |
1698 | num_interfaces += params->iftype_num[iftype]; |
1699 | if (params->iftype_num[iftype] > 0 && | |
cb2d956d LC |
1700 | !(wiphy->software_iftypes & BIT(iftype))) |
1701 | used_iftypes |= BIT(iftype); | |
1702 | } | |
1703 | ||
1704 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1705 | const struct ieee80211_iface_combination *c; | |
1706 | struct ieee80211_iface_limit *limits; | |
1707 | u32 all_iftypes = 0; | |
1708 | ||
1709 | c = &wiphy->iface_combinations[i]; | |
1710 | ||
1711 | if (num_interfaces > c->max_interfaces) | |
1712 | continue; | |
e227300c | 1713 | if (params->num_different_channels > c->num_different_channels) |
cb2d956d LC |
1714 | continue; |
1715 | ||
1716 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1717 | GFP_KERNEL); | |
1718 | if (!limits) | |
1719 | return -ENOMEM; | |
1720 | ||
1721 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1722 | if (wiphy->software_iftypes & BIT(iftype)) | |
1723 | continue; | |
1724 | for (j = 0; j < c->n_limits; j++) { | |
1725 | all_iftypes |= limits[j].types; | |
1726 | if (!(limits[j].types & BIT(iftype))) | |
1727 | continue; | |
e227300c | 1728 | if (limits[j].max < params->iftype_num[iftype]) |
cb2d956d | 1729 | goto cont; |
e227300c | 1730 | limits[j].max -= params->iftype_num[iftype]; |
cb2d956d LC |
1731 | } |
1732 | } | |
1733 | ||
e227300c PK |
1734 | if (params->radar_detect != |
1735 | (c->radar_detect_widths & params->radar_detect)) | |
cb2d956d LC |
1736 | goto cont; |
1737 | ||
e227300c | 1738 | if (params->radar_detect && c->radar_detect_regions && |
8c48b50a FF |
1739 | !(c->radar_detect_regions & BIT(region))) |
1740 | goto cont; | |
1741 | ||
cb2d956d LC |
1742 | /* Finally check that all iftypes that we're currently |
1743 | * using are actually part of this combination. If they | |
1744 | * aren't then we can't use this combination and have | |
1745 | * to continue to the next. | |
1746 | */ | |
1747 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1748 | goto cont; | |
1749 | ||
4c8dea63 | 1750 | if (beacon_int_gcd) { |
0c317a02 | 1751 | if (c->beacon_int_min_gcd && |
4c8dea63 | 1752 | beacon_int_gcd < c->beacon_int_min_gcd) |
0507a3ac | 1753 | goto cont; |
4c8dea63 | 1754 | if (!c->beacon_int_min_gcd && beacon_int_different) |
0c317a02 PK |
1755 | goto cont; |
1756 | } | |
1757 | ||
cb2d956d LC |
1758 | /* This combination covered all interface types and |
1759 | * supported the requested numbers, so we're good. | |
1760 | */ | |
65a124dd MK |
1761 | |
1762 | (*iter)(c, data); | |
cb2d956d LC |
1763 | cont: |
1764 | kfree(limits); | |
1765 | } | |
1766 | ||
65a124dd MK |
1767 | return 0; |
1768 | } | |
1769 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1770 | ||
1771 | static void | |
1772 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1773 | void *data) | |
1774 | { | |
1775 | int *num = data; | |
1776 | (*num)++; | |
1777 | } | |
1778 | ||
1779 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
e227300c | 1780 | struct iface_combination_params *params) |
65a124dd MK |
1781 | { |
1782 | int err, num = 0; | |
1783 | ||
e227300c | 1784 | err = cfg80211_iter_combinations(wiphy, params, |
65a124dd MK |
1785 | cfg80211_iter_sum_ifcombs, &num); |
1786 | if (err) | |
1787 | return err; | |
1788 | if (num == 0) | |
1789 | return -EBUSY; | |
1790 | ||
1791 | return 0; | |
cb2d956d LC |
1792 | } |
1793 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1794 | ||
34850ab2 JB |
1795 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1796 | const u8 *rates, unsigned int n_rates, | |
1797 | u32 *mask) | |
1798 | { | |
1799 | int i, j; | |
1800 | ||
a401d2bb JB |
1801 | if (!sband) |
1802 | return -EINVAL; | |
1803 | ||
34850ab2 JB |
1804 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1805 | return -EINVAL; | |
1806 | ||
1807 | *mask = 0; | |
1808 | ||
1809 | for (i = 0; i < n_rates; i++) { | |
1810 | int rate = (rates[i] & 0x7f) * 5; | |
1811 | bool found = false; | |
1812 | ||
1813 | for (j = 0; j < sband->n_bitrates; j++) { | |
1814 | if (sband->bitrates[j].bitrate == rate) { | |
1815 | found = true; | |
1816 | *mask |= BIT(j); | |
1817 | break; | |
1818 | } | |
1819 | } | |
1820 | if (!found) | |
1821 | return -EINVAL; | |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * mask must have at least one bit set here since we | |
1826 | * didn't accept a 0-length rates array nor allowed | |
1827 | * entries in the array that didn't exist | |
1828 | */ | |
1829 | ||
1830 | return 0; | |
1831 | } | |
11a2a357 | 1832 | |
bdfbec2d IP |
1833 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1834 | { | |
57fbcce3 | 1835 | enum nl80211_band band; |
bdfbec2d IP |
1836 | unsigned int n_channels = 0; |
1837 | ||
57fbcce3 | 1838 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1839 | if (wiphy->bands[band]) |
1840 | n_channels += wiphy->bands[band]->n_channels; | |
1841 | ||
1842 | return n_channels; | |
1843 | } | |
1844 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1845 | ||
7406353d AQ |
1846 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1847 | struct station_info *sinfo) | |
1848 | { | |
1849 | struct cfg80211_registered_device *rdev; | |
1850 | struct wireless_dev *wdev; | |
1851 | ||
1852 | wdev = dev->ieee80211_ptr; | |
1853 | if (!wdev) | |
1854 | return -EOPNOTSUPP; | |
1855 | ||
1856 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1857 | if (!rdev->ops->get_station) | |
1858 | return -EOPNOTSUPP; | |
1859 | ||
3c12d048 SE |
1860 | memset(sinfo, 0, sizeof(*sinfo)); |
1861 | ||
7406353d AQ |
1862 | return rdev_get_station(rdev, dev, mac_addr, sinfo); |
1863 | } | |
1864 | EXPORT_SYMBOL(cfg80211_get_station); | |
1865 | ||
a442b761 AB |
1866 | void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
1867 | { | |
1868 | int i; | |
1869 | ||
1870 | if (!f) | |
1871 | return; | |
1872 | ||
1873 | kfree(f->serv_spec_info); | |
1874 | kfree(f->srf_bf); | |
1875 | kfree(f->srf_macs); | |
1876 | for (i = 0; i < f->num_rx_filters; i++) | |
1877 | kfree(f->rx_filters[i].filter); | |
1878 | ||
1879 | for (i = 0; i < f->num_tx_filters; i++) | |
1880 | kfree(f->tx_filters[i].filter); | |
1881 | ||
1882 | kfree(f->rx_filters); | |
1883 | kfree(f->tx_filters); | |
1884 | kfree(f); | |
1885 | } | |
1886 | EXPORT_SYMBOL(cfg80211_free_nan_func); | |
1887 | ||
4787cfa0 RM |
1888 | bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
1889 | u32 center_freq_khz, u32 bw_khz) | |
1890 | { | |
1891 | u32 start_freq_khz, end_freq_khz; | |
1892 | ||
1893 | start_freq_khz = center_freq_khz - (bw_khz / 2); | |
1894 | end_freq_khz = center_freq_khz + (bw_khz / 2); | |
1895 | ||
1896 | if (start_freq_khz >= freq_range->start_freq_khz && | |
1897 | end_freq_khz <= freq_range->end_freq_khz) | |
1898 | return true; | |
1899 | ||
1900 | return false; | |
1901 | } | |
1902 | ||
8689c051 AS |
1903 | int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) |
1904 | { | |
1d211d43 JB |
1905 | sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1, |
1906 | sizeof(*(sinfo->pertid)), | |
1907 | gfp); | |
8689c051 AS |
1908 | if (!sinfo->pertid) |
1909 | return -ENOMEM; | |
1910 | ||
1911 | return 0; | |
1912 | } | |
1913 | EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); | |
1914 | ||
11a2a357 JB |
1915 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1916 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1917 | const unsigned char rfc1042_header[] __aligned(2) = | |
1918 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1919 | EXPORT_SYMBOL(rfc1042_header); | |
1920 | ||
1921 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1922 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1923 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1924 | EXPORT_SYMBOL(bridge_tunnel_header); | |
30ca1aa5 DL |
1925 | |
1926 | /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ | |
1927 | struct iapp_layer2_update { | |
1928 | u8 da[ETH_ALEN]; /* broadcast */ | |
1929 | u8 sa[ETH_ALEN]; /* STA addr */ | |
1930 | __be16 len; /* 6 */ | |
1931 | u8 dsap; /* 0 */ | |
1932 | u8 ssap; /* 0 */ | |
1933 | u8 control; | |
1934 | u8 xid_info[3]; | |
1935 | } __packed; | |
1936 | ||
1937 | void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) | |
1938 | { | |
1939 | struct iapp_layer2_update *msg; | |
1940 | struct sk_buff *skb; | |
1941 | ||
1942 | /* Send Level 2 Update Frame to update forwarding tables in layer 2 | |
1943 | * bridge devices */ | |
1944 | ||
1945 | skb = dev_alloc_skb(sizeof(*msg)); | |
1946 | if (!skb) | |
1947 | return; | |
1948 | msg = skb_put(skb, sizeof(*msg)); | |
1949 | ||
1950 | /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) | |
1951 | * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ | |
1952 | ||
1953 | eth_broadcast_addr(msg->da); | |
1954 | ether_addr_copy(msg->sa, addr); | |
1955 | msg->len = htons(6); | |
1956 | msg->dsap = 0; | |
1957 | msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ | |
1958 | msg->control = 0xaf; /* XID response lsb.1111F101. | |
1959 | * F=0 (no poll command; unsolicited frame) */ | |
1960 | msg->xid_info[0] = 0x81; /* XID format identifier */ | |
1961 | msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ | |
1962 | msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ | |
1963 | ||
1964 | skb->dev = dev; | |
1965 | skb->protocol = eth_type_trans(skb, dev); | |
1966 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1967 | netif_rx_ni(skb); | |
1968 | } | |
1969 | EXPORT_SYMBOL(cfg80211_send_layer2_update); | |
b0aa75f0 JB |
1970 | |
1971 | int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, | |
1972 | enum ieee80211_vht_chanwidth bw, | |
1973 | int mcs, bool ext_nss_bw_capable) | |
1974 | { | |
1975 | u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); | |
1976 | int max_vht_nss = 0; | |
1977 | int ext_nss_bw; | |
1978 | int supp_width; | |
1979 | int i, mcs_encoding; | |
1980 | ||
1981 | if (map == 0xffff) | |
1982 | return 0; | |
1983 | ||
1984 | if (WARN_ON(mcs > 9)) | |
1985 | return 0; | |
1986 | if (mcs <= 7) | |
1987 | mcs_encoding = 0; | |
1988 | else if (mcs == 8) | |
1989 | mcs_encoding = 1; | |
1990 | else | |
1991 | mcs_encoding = 2; | |
1992 | ||
1993 | /* find max_vht_nss for the given MCS */ | |
1994 | for (i = 7; i >= 0; i--) { | |
1995 | int supp = (map >> (2 * i)) & 3; | |
1996 | ||
1997 | if (supp == 3) | |
1998 | continue; | |
1999 | ||
2000 | if (supp >= mcs_encoding) { | |
2001 | max_vht_nss = i; | |
2002 | break; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | if (!(cap->supp_mcs.tx_mcs_map & | |
2007 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) | |
2008 | return max_vht_nss; | |
2009 | ||
2010 | ext_nss_bw = le32_get_bits(cap->vht_cap_info, | |
2011 | IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); | |
2012 | supp_width = le32_get_bits(cap->vht_cap_info, | |
2013 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); | |
2014 | ||
2015 | /* if not capable, treat ext_nss_bw as 0 */ | |
2016 | if (!ext_nss_bw_capable) | |
2017 | ext_nss_bw = 0; | |
2018 | ||
2019 | /* This is invalid */ | |
2020 | if (supp_width == 3) | |
2021 | return 0; | |
2022 | ||
2023 | /* This is an invalid combination so pretend nothing is supported */ | |
2024 | if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
2025 | return 0; | |
2026 | ||
2027 | /* | |
2028 | * Cover all the special cases according to IEEE 802.11-2016 | |
2029 | * Table 9-250. All other cases are either factor of 1 or not | |
2030 | * valid/supported. | |
2031 | */ | |
2032 | switch (bw) { | |
2033 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
2034 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
2035 | if ((supp_width == 1 || supp_width == 2) && | |
2036 | ext_nss_bw == 3) | |
2037 | return 2 * max_vht_nss; | |
2038 | break; | |
2039 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
2040 | if (supp_width == 0 && | |
2041 | (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
93bc8ac4 | 2042 | return max_vht_nss / 2; |
b0aa75f0 JB |
2043 | if (supp_width == 0 && |
2044 | ext_nss_bw == 3) | |
93bc8ac4 | 2045 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2046 | if (supp_width == 1 && |
2047 | ext_nss_bw == 3) | |
2048 | return 2 * max_vht_nss; | |
2049 | break; | |
2050 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
93bc8ac4 | 2051 | if (supp_width == 0 && ext_nss_bw == 1) |
b0aa75f0 JB |
2052 | return 0; /* not possible */ |
2053 | if (supp_width == 0 && | |
2054 | ext_nss_bw == 2) | |
93bc8ac4 | 2055 | return max_vht_nss / 2; |
b0aa75f0 JB |
2056 | if (supp_width == 0 && |
2057 | ext_nss_bw == 3) | |
93bc8ac4 | 2058 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2059 | if (supp_width == 1 && |
2060 | ext_nss_bw == 0) | |
2061 | return 0; /* not possible */ | |
2062 | if (supp_width == 1 && | |
2063 | ext_nss_bw == 1) | |
93bc8ac4 | 2064 | return max_vht_nss / 2; |
b0aa75f0 JB |
2065 | if (supp_width == 1 && |
2066 | ext_nss_bw == 2) | |
93bc8ac4 | 2067 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2068 | break; |
2069 | } | |
2070 | ||
2071 | /* not covered or invalid combination received */ | |
2072 | return max_vht_nss; | |
2073 | } | |
2074 | EXPORT_SYMBOL(ieee80211_get_vht_max_nss); |