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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 |
9166cc49 | 8 | * Copyright (C) 2018-2020 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 | ||
934f4c7d | 75 | u32 ieee80211_channel_to_freq_khz(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 | 83 | if (chan == 14) |
934f4c7d | 84 | return MHZ_TO_KHZ(2484); |
59eb21a6 | 85 | else if (chan < 14) |
934f4c7d | 86 | return MHZ_TO_KHZ(2407 + chan * 5); |
3a0c52a6 | 87 | break; |
57fbcce3 | 88 | case NL80211_BAND_5GHZ: |
3a0c52a6 | 89 | if (chan >= 182 && chan <= 196) |
934f4c7d | 90 | return MHZ_TO_KHZ(4000 + chan * 5); |
59eb21a6 | 91 | else |
934f4c7d | 92 | return MHZ_TO_KHZ(5000 + chan * 5); |
3a0c52a6 | 93 | break; |
fa1f1085 | 94 | case NL80211_BAND_6GHZ: |
d1a1646c AVS |
95 | /* see 802.11ax D6.1 27.3.23.2 */ |
96 | if (chan == 2) | |
97 | return MHZ_TO_KHZ(5935); | |
fa1f1085 | 98 | if (chan <= 253) |
d1a1646c | 99 | return MHZ_TO_KHZ(5950 + chan * 5); |
fa1f1085 | 100 | break; |
57fbcce3 | 101 | case NL80211_BAND_60GHZ: |
9cf0a0b4 | 102 | if (chan < 7) |
934f4c7d | 103 | return MHZ_TO_KHZ(56160 + chan * 2160); |
3a0c52a6 VK |
104 | break; |
105 | default: | |
106 | ; | |
59eb21a6 | 107 | } |
3a0c52a6 | 108 | return 0; /* not supported */ |
8318d78a | 109 | } |
934f4c7d | 110 | EXPORT_SYMBOL(ieee80211_channel_to_freq_khz); |
8318d78a | 111 | |
934f4c7d | 112 | int ieee80211_freq_khz_to_channel(u32 freq) |
8318d78a | 113 | { |
934f4c7d TP |
114 | /* TODO: just handle MHz for now */ |
115 | freq = KHZ_TO_MHZ(freq); | |
116 | ||
59eb21a6 | 117 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
118 | if (freq == 2484) |
119 | return 14; | |
59eb21a6 | 120 | else if (freq < 2484) |
8318d78a | 121 | return (freq - 2407) / 5; |
59eb21a6 BR |
122 | else if (freq >= 4910 && freq <= 4980) |
123 | return (freq - 4000) / 5; | |
df5d7a88 | 124 | else if (freq < 5945) |
59eb21a6 | 125 | return (freq - 5000) / 5; |
fa1f1085 AS |
126 | else if (freq <= 45000) /* DMG band lower limit */ |
127 | /* see 802.11ax D4.1 27.3.22.2 */ | |
128 | return (freq - 5940) / 5; | |
9cf0a0b4 | 129 | else if (freq >= 58320 && freq <= 70200) |
3a0c52a6 VK |
130 | return (freq - 56160) / 2160; |
131 | else | |
132 | return 0; | |
8318d78a | 133 | } |
934f4c7d | 134 | EXPORT_SYMBOL(ieee80211_freq_khz_to_channel); |
8318d78a | 135 | |
934f4c7d TP |
136 | struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy, |
137 | u32 freq) | |
906c730a | 138 | { |
57fbcce3 | 139 | enum nl80211_band band; |
906c730a JB |
140 | struct ieee80211_supported_band *sband; |
141 | int i; | |
142 | ||
57fbcce3 | 143 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
144 | sband = wiphy->bands[band]; |
145 | ||
146 | if (!sband) | |
147 | continue; | |
148 | ||
149 | for (i = 0; i < sband->n_channels; i++) { | |
934f4c7d TP |
150 | struct ieee80211_channel *chan = &sband->channels[i]; |
151 | ||
152 | if (ieee80211_channel_to_khz(chan) == freq) | |
153 | return chan; | |
906c730a JB |
154 | } |
155 | } | |
156 | ||
157 | return NULL; | |
158 | } | |
934f4c7d | 159 | EXPORT_SYMBOL(ieee80211_get_channel_khz); |
906c730a | 160 | |
343884c8 | 161 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
8318d78a JB |
162 | { |
163 | int i, want; | |
164 | ||
343884c8 | 165 | switch (sband->band) { |
57fbcce3 | 166 | case NL80211_BAND_5GHZ: |
62524a58 | 167 | case NL80211_BAND_6GHZ: |
8318d78a JB |
168 | want = 3; |
169 | for (i = 0; i < sband->n_bitrates; i++) { | |
170 | if (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_A; | |
175 | want--; | |
176 | } | |
177 | } | |
178 | WARN_ON(want); | |
179 | break; | |
57fbcce3 | 180 | case NL80211_BAND_2GHZ: |
8318d78a JB |
181 | want = 7; |
182 | for (i = 0; i < sband->n_bitrates; i++) { | |
1bd773c0 RS |
183 | switch (sband->bitrates[i].bitrate) { |
184 | case 10: | |
185 | case 20: | |
186 | case 55: | |
187 | case 110: | |
8318d78a JB |
188 | sband->bitrates[i].flags |= |
189 | IEEE80211_RATE_MANDATORY_B | | |
190 | IEEE80211_RATE_MANDATORY_G; | |
191 | want--; | |
1bd773c0 RS |
192 | break; |
193 | case 60: | |
194 | case 120: | |
195 | case 240: | |
8318d78a JB |
196 | sband->bitrates[i].flags |= |
197 | IEEE80211_RATE_MANDATORY_G; | |
198 | want--; | |
1bd773c0 RS |
199 | /* fall through */ |
200 | default: | |
8318d78a JB |
201 | sband->bitrates[i].flags |= |
202 | IEEE80211_RATE_ERP_G; | |
1bd773c0 RS |
203 | break; |
204 | } | |
8318d78a | 205 | } |
1bd773c0 | 206 | WARN_ON(want != 0 && want != 3); |
8318d78a | 207 | break; |
57fbcce3 | 208 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
209 | /* check for mandatory HT MCS 1..4 */ |
210 | WARN_ON(!sband->ht_cap.ht_supported); | |
211 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
212 | break; | |
57fbcce3 | 213 | case NUM_NL80211_BANDS: |
343884c8 | 214 | default: |
8318d78a JB |
215 | WARN_ON(1); |
216 | break; | |
217 | } | |
218 | } | |
219 | ||
220 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
221 | { | |
57fbcce3 | 222 | enum nl80211_band band; |
8318d78a | 223 | |
57fbcce3 | 224 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a | 225 | if (wiphy->bands[band]) |
343884c8 | 226 | set_mandatory_flags_band(wiphy->bands[band]); |
8318d78a | 227 | } |
08645126 | 228 | |
38ba3c57 JM |
229 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
230 | { | |
231 | int i; | |
232 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
233 | if (cipher == wiphy->cipher_suites[i]) | |
234 | return true; | |
235 | return false; | |
236 | } | |
237 | ||
fffd0934 JB |
238 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
239 | struct key_params *params, int key_idx, | |
e31b8213 | 240 | bool pairwise, const u8 *mac_addr) |
08645126 | 241 | { |
56be393f JM |
242 | int max_key_idx = 5; |
243 | ||
244 | if (wiphy_ext_feature_isset(&rdev->wiphy, | |
0e47901d JB |
245 | NL80211_EXT_FEATURE_BEACON_PROTECTION) || |
246 | wiphy_ext_feature_isset(&rdev->wiphy, | |
247 | NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) | |
56be393f JM |
248 | max_key_idx = 7; |
249 | if (key_idx < 0 || key_idx > max_key_idx) | |
08645126 JB |
250 | return -EINVAL; |
251 | ||
e31b8213 JB |
252 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
253 | return -EINVAL; | |
254 | ||
255 | if (pairwise && !mac_addr) | |
256 | return -EINVAL; | |
257 | ||
37720569 JM |
258 | switch (params->cipher) { |
259 | case WLAN_CIPHER_SUITE_TKIP: | |
b67fd72e AW |
260 | /* Extended Key ID can only be used with CCMP/GCMP ciphers */ |
261 | if ((pairwise && key_idx) || | |
262 | params->mode != NL80211_KEY_RX_TX) | |
263 | return -EINVAL; | |
264 | break; | |
37720569 | 265 | case WLAN_CIPHER_SUITE_CCMP: |
cfcf1682 JM |
266 | case WLAN_CIPHER_SUITE_CCMP_256: |
267 | case WLAN_CIPHER_SUITE_GCMP: | |
268 | case WLAN_CIPHER_SUITE_GCMP_256: | |
b67fd72e AW |
269 | /* IEEE802.11-2016 allows only 0 and - when supporting |
270 | * Extended Key ID - 1 as index for pairwise keys. | |
6cdd3979 AW |
271 | * @NL80211_KEY_NO_TX is only allowed for pairwise keys when |
272 | * the driver supports Extended Key ID. | |
273 | * @NL80211_KEY_SET_TX can't be set when installing and | |
274 | * validating a key. | |
37720569 | 275 | */ |
b67fd72e AW |
276 | if ((params->mode == NL80211_KEY_NO_TX && !pairwise) || |
277 | params->mode == NL80211_KEY_SET_TX) | |
278 | return -EINVAL; | |
279 | if (wiphy_ext_feature_isset(&rdev->wiphy, | |
280 | NL80211_EXT_FEATURE_EXT_KEY_ID)) { | |
281 | if (pairwise && (key_idx < 0 || key_idx > 1)) | |
6cdd3979 | 282 | return -EINVAL; |
b67fd72e | 283 | } else if (pairwise && key_idx) { |
37720569 | 284 | return -EINVAL; |
6cdd3979 | 285 | } |
37720569 JM |
286 | break; |
287 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
288 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
289 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
290 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
291 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
292 | if (pairwise) | |
293 | return -EINVAL; | |
e9c8f8d3 JB |
294 | if (key_idx < 4) |
295 | return -EINVAL; | |
37720569 | 296 | break; |
e9c8f8d3 JB |
297 | case WLAN_CIPHER_SUITE_WEP40: |
298 | case WLAN_CIPHER_SUITE_WEP104: | |
299 | if (key_idx > 3) | |
300 | return -EINVAL; | |
37720569 JM |
301 | default: |
302 | break; | |
303 | } | |
08645126 | 304 | |
08645126 JB |
305 | switch (params->cipher) { |
306 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 307 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
308 | return -EINVAL; |
309 | break; | |
310 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 311 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
312 | return -EINVAL; |
313 | break; | |
314 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 315 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
316 | return -EINVAL; |
317 | break; | |
cfcf1682 JM |
318 | case WLAN_CIPHER_SUITE_CCMP_256: |
319 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
320 | return -EINVAL; | |
321 | break; | |
322 | case WLAN_CIPHER_SUITE_GCMP: | |
323 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
324 | return -EINVAL; | |
325 | break; | |
326 | case WLAN_CIPHER_SUITE_GCMP_256: | |
327 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
328 | return -EINVAL; | |
329 | break; | |
08645126 | 330 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 331 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
332 | return -EINVAL; |
333 | break; | |
334 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 335 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
336 | return -EINVAL; |
337 | break; | |
cfcf1682 JM |
338 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
339 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
340 | return -EINVAL; | |
341 | break; | |
342 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
343 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
344 | return -EINVAL; | |
345 | break; | |
346 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
347 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
348 | return -EINVAL; | |
349 | break; | |
08645126 | 350 | default: |
7d64b7cc JB |
351 | /* |
352 | * We don't know anything about this algorithm, | |
353 | * allow using it -- but the driver must check | |
354 | * all parameters! We still check below whether | |
355 | * or not the driver supports this algorithm, | |
356 | * of course. | |
357 | */ | |
358 | break; | |
08645126 JB |
359 | } |
360 | ||
9f26a952 JM |
361 | if (params->seq) { |
362 | switch (params->cipher) { | |
363 | case WLAN_CIPHER_SUITE_WEP40: | |
364 | case WLAN_CIPHER_SUITE_WEP104: | |
365 | /* These ciphers do not use key sequence */ | |
366 | return -EINVAL; | |
367 | case WLAN_CIPHER_SUITE_TKIP: | |
368 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
369 | case WLAN_CIPHER_SUITE_CCMP_256: |
370 | case WLAN_CIPHER_SUITE_GCMP: | |
371 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 372 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
373 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
374 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
375 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
376 | if (params->seq_len != 6) |
377 | return -EINVAL; | |
378 | break; | |
379 | } | |
380 | } | |
381 | ||
38ba3c57 | 382 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
383 | return -EINVAL; |
384 | ||
08645126 JB |
385 | return 0; |
386 | } | |
e31a16d6 | 387 | |
633adf1a | 388 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
389 | { |
390 | unsigned int hdrlen = 24; | |
391 | ||
392 | if (ieee80211_is_data(fc)) { | |
393 | if (ieee80211_has_a4(fc)) | |
394 | hdrlen = 30; | |
d0dd2de0 | 395 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 396 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
397 | if (ieee80211_has_order(fc)) |
398 | hdrlen += IEEE80211_HT_CTL_LEN; | |
399 | } | |
e31a16d6 ZY |
400 | goto out; |
401 | } | |
402 | ||
fb142f4b FC |
403 | if (ieee80211_is_mgmt(fc)) { |
404 | if (ieee80211_has_order(fc)) | |
405 | hdrlen += IEEE80211_HT_CTL_LEN; | |
406 | goto out; | |
407 | } | |
408 | ||
e31a16d6 ZY |
409 | if (ieee80211_is_ctl(fc)) { |
410 | /* | |
411 | * ACK and CTS are 10 bytes, all others 16. To see how | |
412 | * to get this condition consider | |
413 | * subtype mask: 0b0000000011110000 (0x00F0) | |
414 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
415 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
416 | * bits that matter: ^^^ (0x00E0) | |
417 | * value of those: 0b0000000011000000 (0x00C0) | |
418 | */ | |
419 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
420 | hdrlen = 10; | |
421 | else | |
422 | hdrlen = 16; | |
423 | } | |
424 | out: | |
425 | return hdrlen; | |
426 | } | |
427 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
428 | ||
429 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
430 | { | |
431 | const struct ieee80211_hdr *hdr = | |
432 | (const struct ieee80211_hdr *)skb->data; | |
433 | unsigned int hdrlen; | |
434 | ||
435 | if (unlikely(skb->len < 10)) | |
436 | return 0; | |
437 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
438 | if (unlikely(hdrlen > skb->len)) | |
439 | return 0; | |
440 | return hdrlen; | |
441 | } | |
442 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
443 | ||
2d1c304c | 444 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 445 | { |
2d1c304c | 446 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 447 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 448 | switch (ae) { |
7dd111e8 | 449 | default: |
e31a16d6 ZY |
450 | case 0: |
451 | return 6; | |
3c5772a5 | 452 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 453 | return 12; |
3c5772a5 | 454 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 455 | return 18; |
e31a16d6 ZY |
456 | } |
457 | } | |
2d1c304c FF |
458 | |
459 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
460 | { | |
461 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
462 | } | |
9b395bc3 | 463 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 464 | |
7f6990c8 | 465 | int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
24bba078 FF |
466 | const u8 *addr, enum nl80211_iftype iftype, |
467 | u8 data_offset) | |
e31a16d6 ZY |
468 | { |
469 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
470 | struct { |
471 | u8 hdr[ETH_ALEN] __aligned(2); | |
472 | __be16 proto; | |
473 | } payload; | |
474 | struct ethhdr tmp; | |
475 | u16 hdrlen; | |
476 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
477 | |
478 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
479 | return -1; | |
480 | ||
24bba078 | 481 | hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; |
2d1c304c FF |
482 | if (skb->len < hdrlen + 8) |
483 | return -1; | |
e31a16d6 ZY |
484 | |
485 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
486 | * header | |
487 | * IEEE 802.11 address fields: | |
488 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
489 | * 0 0 DA SA BSSID n/a | |
490 | * 0 1 DA BSSID SA n/a | |
491 | * 1 0 BSSID SA DA n/a | |
492 | * 1 1 RA TA DA SA | |
493 | */ | |
2d1c304c FF |
494 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
495 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
496 | ||
497 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
498 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 | 499 | |
5667c86a RM |
500 | mesh_flags &= MESH_FLAGS_AE; |
501 | ||
e31a16d6 ZY |
502 | switch (hdr->frame_control & |
503 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
504 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
505 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
506 | iftype != NL80211_IFTYPE_AP_VLAN && |
507 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
508 | return -1; |
509 | break; | |
510 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
511 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
512 | iftype != NL80211_IFTYPE_MESH_POINT && |
513 | iftype != NL80211_IFTYPE_AP_VLAN && | |
514 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
515 | return -1; |
516 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
5667c86a | 517 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f | 518 | return -1; |
5667c86a | 519 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
520 | skb_copy_bits(skb, hdrlen + |
521 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 522 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 523 | } |
2d1c304c | 524 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
525 | } |
526 | break; | |
527 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 528 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
529 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
530 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
531 | (is_multicast_ether_addr(tmp.h_dest) && |
532 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 533 | return -1; |
3c5772a5 | 534 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
5667c86a | 535 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 536 | return -1; |
5667c86a | 537 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
538 | skb_copy_bits(skb, hdrlen + |
539 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
540 | tmp.h_source, ETH_ALEN); |
541 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 542 | } |
e31a16d6 ZY |
543 | break; |
544 | case cpu_to_le16(0): | |
941c93cd | 545 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
546 | iftype != NL80211_IFTYPE_STATION && |
547 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 548 | return -1; |
e31a16d6 ZY |
549 | break; |
550 | } | |
551 | ||
2d1c304c FF |
552 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
553 | tmp.h_proto = payload.proto; | |
e31a16d6 | 554 | |
2d1c304c FF |
555 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
556 | tmp.h_proto != htons(ETH_P_AARP) && | |
557 | tmp.h_proto != htons(ETH_P_IPX)) || | |
558 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
559 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
560 | * replace EtherType */ | |
2d1c304c FF |
561 | hdrlen += ETH_ALEN + 2; |
562 | else | |
c041778c | 563 | tmp.h_proto = htons(skb->len - hdrlen); |
2d1c304c FF |
564 | |
565 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 566 | |
2d1c304c | 567 | if (!ehdr) |
d58ff351 | 568 | ehdr = skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
569 | memcpy(ehdr, &tmp, sizeof(tmp)); |
570 | ||
e31a16d6 ZY |
571 | return 0; |
572 | } | |
7f6990c8 | 573 | EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
e31a16d6 | 574 | |
2b67f944 FF |
575 | static void |
576 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
577 | void *ptr, int len, int size) | |
578 | { | |
579 | struct skb_shared_info *sh = skb_shinfo(skb); | |
580 | int page_offset; | |
581 | ||
81c044fc | 582 | get_page(page); |
2b67f944 FF |
583 | page_offset = ptr - page_address(page); |
584 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
585 | } | |
586 | ||
587 | static void | |
588 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
589 | int offset, int len) | |
590 | { | |
591 | struct skb_shared_info *sh = skb_shinfo(skb); | |
aa1702dd | 592 | const skb_frag_t *frag = &sh->frags[0]; |
2b67f944 FF |
593 | struct page *frag_page; |
594 | void *frag_ptr; | |
595 | int frag_len, frag_size; | |
596 | int head_size = skb->len - skb->data_len; | |
597 | int cur_len; | |
598 | ||
599 | frag_page = virt_to_head_page(skb->head); | |
600 | frag_ptr = skb->data; | |
601 | frag_size = head_size; | |
602 | ||
603 | while (offset >= frag_size) { | |
604 | offset -= frag_size; | |
2b67f944 FF |
605 | frag_page = skb_frag_page(frag); |
606 | frag_ptr = skb_frag_address(frag); | |
607 | frag_size = skb_frag_size(frag); | |
aa1702dd | 608 | frag++; |
2b67f944 FF |
609 | } |
610 | ||
611 | frag_ptr += offset; | |
612 | frag_len = frag_size - offset; | |
613 | ||
614 | cur_len = min(len, frag_len); | |
615 | ||
616 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
617 | len -= cur_len; | |
618 | ||
619 | while (len > 0) { | |
2b67f944 FF |
620 | frag_len = skb_frag_size(frag); |
621 | cur_len = min(len, frag_len); | |
622 | __frame_add_frag(frame, skb_frag_page(frag), | |
623 | skb_frag_address(frag), cur_len, frag_len); | |
624 | len -= cur_len; | |
aa1702dd | 625 | frag++; |
2b67f944 FF |
626 | } |
627 | } | |
628 | ||
230fd28a FF |
629 | static struct sk_buff * |
630 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 631 | int offset, int len, bool reuse_frag) |
230fd28a FF |
632 | { |
633 | struct sk_buff *frame; | |
2b67f944 | 634 | int cur_len = len; |
230fd28a FF |
635 | |
636 | if (skb->len - offset < len) | |
637 | return NULL; | |
638 | ||
2b67f944 FF |
639 | /* |
640 | * When reusing framents, copy some data to the head to simplify | |
641 | * ethernet header handling and speed up protocol header processing | |
642 | * in the stack later. | |
643 | */ | |
644 | if (reuse_frag) | |
645 | cur_len = min_t(int, len, 32); | |
646 | ||
230fd28a FF |
647 | /* |
648 | * Allocate and reserve two bytes more for payload | |
649 | * alignment since sizeof(struct ethhdr) is 14. | |
650 | */ | |
2b67f944 | 651 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
16a910a6 GG |
652 | if (!frame) |
653 | return NULL; | |
230fd28a FF |
654 | |
655 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
656 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
657 | ||
658 | len -= cur_len; | |
659 | if (!len) | |
660 | return frame; | |
661 | ||
662 | offset += cur_len; | |
663 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
664 | |
665 | return frame; | |
666 | } | |
eaf85ca7 ZY |
667 | |
668 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
669 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad | 670 | const unsigned int extra_headroom, |
8b935ee2 | 671 | const u8 *check_da, const u8 *check_sa) |
eaf85ca7 | 672 | { |
230fd28a | 673 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
674 | struct sk_buff *frame = NULL; |
675 | u16 ethertype; | |
676 | u8 *payload; | |
7f6990c8 | 677 | int offset = 0, remaining; |
230fd28a | 678 | struct ethhdr eth; |
2b67f944 | 679 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 680 | bool reuse_skb = false; |
230fd28a | 681 | bool last = false; |
88665f5a | 682 | |
230fd28a FF |
683 | while (!last) { |
684 | unsigned int subframe_len; | |
685 | int len; | |
eaf85ca7 | 686 | u8 padding; |
eaf85ca7 | 687 | |
230fd28a FF |
688 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
689 | len = ntohs(eth.h_proto); | |
690 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 691 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 692 | |
eaf85ca7 | 693 | /* the last MSDU has no padding */ |
230fd28a | 694 | remaining = skb->len - offset; |
eaf85ca7 ZY |
695 | if (subframe_len > remaining) |
696 | goto purge; | |
697 | ||
230fd28a | 698 | offset += sizeof(struct ethhdr); |
230fd28a | 699 | last = remaining <= subframe_len + padding; |
8b935ee2 JB |
700 | |
701 | /* FIXME: should we really accept multicast DA? */ | |
702 | if ((check_da && !is_multicast_ether_addr(eth.h_dest) && | |
703 | !ether_addr_equal(check_da, eth.h_dest)) || | |
704 | (check_sa && !ether_addr_equal(check_sa, eth.h_source))) { | |
705 | offset += len + padding; | |
706 | continue; | |
707 | } | |
708 | ||
709 | /* reuse skb for the last subframe */ | |
2b67f944 | 710 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 711 | skb_pull(skb, offset); |
eaf85ca7 | 712 | frame = skb; |
230fd28a FF |
713 | reuse_skb = true; |
714 | } else { | |
2b67f944 FF |
715 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
716 | reuse_frag); | |
eaf85ca7 ZY |
717 | if (!frame) |
718 | goto purge; | |
719 | ||
230fd28a | 720 | offset += len + padding; |
eaf85ca7 ZY |
721 | } |
722 | ||
723 | skb_reset_network_header(frame); | |
724 | frame->dev = skb->dev; | |
725 | frame->priority = skb->priority; | |
726 | ||
727 | payload = frame->data; | |
728 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 729 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 730 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 731 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
732 | eth.h_proto = htons(ethertype); |
733 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 734 | } |
230fd28a FF |
735 | |
736 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
737 | __skb_queue_tail(list, frame); |
738 | } | |
739 | ||
230fd28a FF |
740 | if (!reuse_skb) |
741 | dev_kfree_skb(skb); | |
742 | ||
eaf85ca7 ZY |
743 | return; |
744 | ||
745 | purge: | |
746 | __skb_queue_purge(list); | |
eaf85ca7 ZY |
747 | dev_kfree_skb(skb); |
748 | } | |
749 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
750 | ||
e31a16d6 | 751 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
752 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
753 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
754 | { |
755 | unsigned int dscp; | |
c6ca5e28 | 756 | unsigned char vlan_priority; |
1fc9b725 | 757 | unsigned int ret; |
e31a16d6 ZY |
758 | |
759 | /* skb->priority values from 256->263 are magic values to | |
760 | * directly indicate a specific 802.1d priority. This is used | |
761 | * to allow 802.1d priority to be passed directly in from VLAN | |
762 | * tags, etc. | |
763 | */ | |
1fc9b725 JB |
764 | if (skb->priority >= 256 && skb->priority <= 263) { |
765 | ret = skb->priority - 256; | |
766 | goto out; | |
767 | } | |
e31a16d6 | 768 | |
df8a39de JP |
769 | if (skb_vlan_tag_present(skb)) { |
770 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 | 771 | >> VLAN_PRIO_SHIFT; |
1fc9b725 JB |
772 | if (vlan_priority > 0) { |
773 | ret = vlan_priority; | |
774 | goto out; | |
775 | } | |
c6ca5e28 V |
776 | } |
777 | ||
e31a16d6 ZY |
778 | switch (skb->protocol) { |
779 | case htons(ETH_P_IP): | |
b156579b DT |
780 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
781 | break; | |
782 | case htons(ETH_P_IPV6): | |
783 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 784 | break; |
960d97f9 SW |
785 | case htons(ETH_P_MPLS_UC): |
786 | case htons(ETH_P_MPLS_MC): { | |
787 | struct mpls_label mpls_tmp, *mpls; | |
788 | ||
789 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
790 | sizeof(*mpls), &mpls_tmp); | |
791 | if (!mpls) | |
792 | return 0; | |
793 | ||
1fc9b725 | 794 | ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) |
960d97f9 | 795 | >> MPLS_LS_TC_SHIFT; |
1fc9b725 | 796 | goto out; |
960d97f9 SW |
797 | } |
798 | case htons(ETH_P_80221): | |
799 | /* 802.21 is always network control traffic */ | |
800 | return 7; | |
e31a16d6 ZY |
801 | default: |
802 | return 0; | |
803 | } | |
804 | ||
fa9ffc74 KP |
805 | if (qos_map) { |
806 | unsigned int i, tmp_dscp = dscp >> 2; | |
807 | ||
808 | for (i = 0; i < qos_map->num_des; i++) { | |
1fc9b725 JB |
809 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) { |
810 | ret = qos_map->dscp_exception[i].up; | |
811 | goto out; | |
812 | } | |
fa9ffc74 KP |
813 | } |
814 | ||
815 | for (i = 0; i < 8; i++) { | |
816 | if (tmp_dscp >= qos_map->up[i].low && | |
1fc9b725 JB |
817 | tmp_dscp <= qos_map->up[i].high) { |
818 | ret = i; | |
819 | goto out; | |
820 | } | |
fa9ffc74 KP |
821 | } |
822 | } | |
823 | ||
1fc9b725 JB |
824 | ret = dscp >> 5; |
825 | out: | |
826 | return array_index_nospec(ret, IEEE80211_NUM_TIDS); | |
e31a16d6 ZY |
827 | } |
828 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 | 829 | |
49a68e0d | 830 | const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) |
517357c6 | 831 | { |
9caf0364 JB |
832 | const struct cfg80211_bss_ies *ies; |
833 | ||
834 | ies = rcu_dereference(bss->ies); | |
835 | if (!ies) | |
517357c6 | 836 | return NULL; |
9caf0364 | 837 | |
49a68e0d | 838 | return cfg80211_find_elem(id, ies->data, ies->len); |
517357c6 | 839 | } |
49a68e0d | 840 | EXPORT_SYMBOL(ieee80211_bss_get_elem); |
fffd0934 JB |
841 | |
842 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
843 | { | |
f26cbf40 | 844 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
845 | struct net_device *dev = wdev->netdev; |
846 | int i; | |
847 | ||
848 | if (!wdev->connect_keys) | |
849 | return; | |
850 | ||
b8676221 | 851 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
fffd0934 JB |
852 | if (!wdev->connect_keys->params[i].cipher) |
853 | continue; | |
e35e4d28 HG |
854 | if (rdev_add_key(rdev, dev, i, false, NULL, |
855 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 856 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
857 | continue; |
858 | } | |
d4f29978 JB |
859 | if (wdev->connect_keys->def == i && |
860 | rdev_set_default_key(rdev, dev, i, true, true)) { | |
861 | netdev_err(dev, "failed to set defkey %d\n", i); | |
862 | continue; | |
863 | } | |
fffd0934 JB |
864 | } |
865 | ||
b47f610b | 866 | kzfree(wdev->connect_keys); |
fffd0934 JB |
867 | wdev->connect_keys = NULL; |
868 | } | |
3d54d255 | 869 | |
1f6fc43e | 870 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
871 | { |
872 | struct cfg80211_event *ev; | |
873 | unsigned long flags; | |
3d54d255 JB |
874 | |
875 | spin_lock_irqsave(&wdev->event_lock, flags); | |
876 | while (!list_empty(&wdev->event_list)) { | |
877 | ev = list_first_entry(&wdev->event_list, | |
878 | struct cfg80211_event, list); | |
879 | list_del(&ev->list); | |
880 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
881 | ||
882 | wdev_lock(wdev); | |
883 | switch (ev->type) { | |
884 | case EVENT_CONNECT_RESULT: | |
3d54d255 | 885 | __cfg80211_connect_result( |
5349a0f7 VK |
886 | wdev->netdev, |
887 | &ev->cr, | |
888 | ev->cr.status == WLAN_STATUS_SUCCESS); | |
3d54d255 JB |
889 | break; |
890 | case EVENT_ROAMED: | |
29ce6ecb | 891 | __cfg80211_roamed(wdev, &ev->rm); |
3d54d255 JB |
892 | break; |
893 | case EVENT_DISCONNECTED: | |
894 | __cfg80211_disconnected(wdev->netdev, | |
895 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
896 | ev->dc.reason, |
897 | !ev->dc.locally_generated); | |
3d54d255 JB |
898 | break; |
899 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
900 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
901 | ev->ij.channel); | |
3d54d255 | 902 | break; |
f04c2203 MK |
903 | case EVENT_STOPPED: |
904 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
905 | break; | |
503c1fb9 AS |
906 | case EVENT_PORT_AUTHORIZED: |
907 | __cfg80211_port_authorized(wdev, ev->pa.bssid); | |
908 | break; | |
3d54d255 JB |
909 | } |
910 | wdev_unlock(wdev); | |
911 | ||
912 | kfree(ev); | |
913 | ||
914 | spin_lock_irqsave(&wdev->event_lock, flags); | |
915 | } | |
916 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
917 | } | |
918 | ||
919 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
920 | { | |
921 | struct wireless_dev *wdev; | |
922 | ||
923 | ASSERT_RTNL(); | |
3d54d255 | 924 | |
53873f13 | 925 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 926 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
927 | } |
928 | ||
929 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
930 | struct net_device *dev, enum nl80211_iftype ntype, | |
818a986e | 931 | struct vif_params *params) |
3d54d255 JB |
932 | { |
933 | int err; | |
934 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
935 | ||
73fb08e2 | 936 | ASSERT_RTNL(); |
3d54d255 JB |
937 | |
938 | /* don't support changing VLANs, you just re-create them */ | |
939 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
940 | return -EOPNOTSUPP; | |
941 | ||
cb3b7d87 AB |
942 | /* cannot change into P2P device or NAN */ |
943 | if (ntype == NL80211_IFTYPE_P2P_DEVICE || | |
944 | ntype == NL80211_IFTYPE_NAN) | |
98104fde JB |
945 | return -EOPNOTSUPP; |
946 | ||
3d54d255 JB |
947 | if (!rdev->ops->change_virtual_intf || |
948 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
949 | return -EOPNOTSUPP; | |
950 | ||
ad4bb6f8 | 951 | /* if it's part of a bridge, reject changing type to station/ibss */ |
2e92a2d0 | 952 | if (netif_is_bridge_port(dev) && |
074ac8df JB |
953 | (ntype == NL80211_IFTYPE_ADHOC || |
954 | ntype == NL80211_IFTYPE_STATION || | |
955 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
956 | return -EBUSY; |
957 | ||
6cbfb1bb | 958 | if (ntype != otype) { |
9bc383de | 959 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 960 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 961 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 962 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 963 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 964 | |
3d54d255 | 965 | switch (otype) { |
ac800140 | 966 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 967 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 968 | break; |
3d54d255 JB |
969 | case NL80211_IFTYPE_ADHOC: |
970 | cfg80211_leave_ibss(rdev, dev, false); | |
971 | break; | |
972 | case NL80211_IFTYPE_STATION: | |
074ac8df | 973 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 974 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
975 | cfg80211_disconnect(rdev, dev, |
976 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 977 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
978 | break; |
979 | case NL80211_IFTYPE_MESH_POINT: | |
980 | /* mesh should be handled? */ | |
981 | break; | |
982 | default: | |
983 | break; | |
984 | } | |
985 | ||
986 | cfg80211_process_rdev_events(rdev); | |
c1d3ad84 | 987 | cfg80211_mlme_purge_registrations(dev->ieee80211_ptr); |
3d54d255 JB |
988 | } |
989 | ||
818a986e | 990 | err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
3d54d255 JB |
991 | |
992 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
993 | ||
9bc383de JB |
994 | if (!err && params && params->use_4addr != -1) |
995 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
996 | ||
ad4bb6f8 JB |
997 | if (!err) { |
998 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
999 | switch (ntype) { | |
1000 | case NL80211_IFTYPE_STATION: | |
1001 | if (dev->ieee80211_ptr->use_4addr) | |
1002 | break; | |
1003 | /* fall through */ | |
6e0bd6c3 | 1004 | case NL80211_IFTYPE_OCB: |
074ac8df | 1005 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
1006 | case NL80211_IFTYPE_ADHOC: |
1007 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
1008 | break; | |
074ac8df | 1009 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
1010 | case NL80211_IFTYPE_AP: |
1011 | case NL80211_IFTYPE_AP_VLAN: | |
1012 | case NL80211_IFTYPE_WDS: | |
1013 | case NL80211_IFTYPE_MESH_POINT: | |
1014 | /* bridging OK */ | |
1015 | break; | |
1016 | case NL80211_IFTYPE_MONITOR: | |
1017 | /* monitor can't bridge anyway */ | |
1018 | break; | |
1019 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1020 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
1021 | /* not happening */ |
1022 | break; | |
98104fde | 1023 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1024 | case NL80211_IFTYPE_NAN: |
98104fde JB |
1025 | WARN_ON(1); |
1026 | break; | |
ad4bb6f8 JB |
1027 | } |
1028 | } | |
1029 | ||
dbbae26a MK |
1030 | if (!err && ntype != otype && netif_running(dev)) { |
1031 | cfg80211_update_iface_num(rdev, ntype, 1); | |
1032 | cfg80211_update_iface_num(rdev, otype, -1); | |
1033 | } | |
1034 | ||
3d54d255 JB |
1035 | return err; |
1036 | } | |
254416aa | 1037 | |
0c1eca4e JB |
1038 | static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
1039 | { | |
1040 | int modulation, streams, bitrate; | |
1041 | ||
1042 | /* the formula below does only work for MCS values smaller than 32 */ | |
1043 | if (WARN_ON_ONCE(rate->mcs >= 32)) | |
1044 | return 0; | |
1045 | ||
1046 | modulation = rate->mcs & 7; | |
1047 | streams = (rate->mcs >> 3) + 1; | |
1048 | ||
1049 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; | |
1050 | ||
1051 | if (modulation < 4) | |
1052 | bitrate *= (modulation + 1); | |
1053 | else if (modulation == 4) | |
1054 | bitrate *= (modulation + 2); | |
1055 | else | |
1056 | bitrate *= (modulation + 3); | |
1057 | ||
1058 | bitrate *= streams; | |
1059 | ||
1060 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1061 | bitrate = (bitrate / 9) * 10; | |
1062 | ||
1063 | /* do NOT round down here */ | |
1064 | return (bitrate + 50000) / 100000; | |
1065 | } | |
1066 | ||
2a38075c | 1067 | static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate) |
95ddc1fc VK |
1068 | { |
1069 | static const u32 __mcs2bitrate[] = { | |
1070 | /* control PHY */ | |
1071 | [0] = 275, | |
1072 | /* SC PHY */ | |
1073 | [1] = 3850, | |
1074 | [2] = 7700, | |
1075 | [3] = 9625, | |
1076 | [4] = 11550, | |
1077 | [5] = 12512, /* 1251.25 mbps */ | |
1078 | [6] = 15400, | |
1079 | [7] = 19250, | |
1080 | [8] = 23100, | |
1081 | [9] = 25025, | |
1082 | [10] = 30800, | |
1083 | [11] = 38500, | |
1084 | [12] = 46200, | |
1085 | /* OFDM PHY */ | |
1086 | [13] = 6930, | |
1087 | [14] = 8662, /* 866.25 mbps */ | |
1088 | [15] = 13860, | |
1089 | [16] = 17325, | |
1090 | [17] = 20790, | |
1091 | [18] = 27720, | |
1092 | [19] = 34650, | |
1093 | [20] = 41580, | |
1094 | [21] = 45045, | |
1095 | [22] = 51975, | |
1096 | [23] = 62370, | |
1097 | [24] = 67568, /* 6756.75 mbps */ | |
1098 | /* LP-SC PHY */ | |
1099 | [25] = 6260, | |
1100 | [26] = 8340, | |
1101 | [27] = 11120, | |
1102 | [28] = 12510, | |
1103 | [29] = 16680, | |
1104 | [30] = 22240, | |
1105 | [31] = 25030, | |
1106 | }; | |
1107 | ||
1108 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1109 | return 0; | |
1110 | ||
1111 | return __mcs2bitrate[rate->mcs]; | |
1112 | } | |
1113 | ||
2a38075c AAL |
1114 | static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate) |
1115 | { | |
1116 | static const u32 __mcs2bitrate[] = { | |
1117 | /* control PHY */ | |
1118 | [0] = 275, | |
1119 | /* SC PHY */ | |
1120 | [1] = 3850, | |
1121 | [2] = 7700, | |
1122 | [3] = 9625, | |
1123 | [4] = 11550, | |
1124 | [5] = 12512, /* 1251.25 mbps */ | |
1125 | [6] = 13475, | |
1126 | [7] = 15400, | |
1127 | [8] = 19250, | |
1128 | [9] = 23100, | |
1129 | [10] = 25025, | |
1130 | [11] = 26950, | |
1131 | [12] = 30800, | |
1132 | [13] = 38500, | |
1133 | [14] = 46200, | |
1134 | [15] = 50050, | |
1135 | [16] = 53900, | |
1136 | [17] = 57750, | |
1137 | [18] = 69300, | |
1138 | [19] = 75075, | |
1139 | [20] = 80850, | |
1140 | }; | |
1141 | ||
1142 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1143 | return 0; | |
1144 | ||
1145 | return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch; | |
1146 | } | |
1147 | ||
db9c64cf JB |
1148 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1149 | { | |
1150 | static const u32 base[4][10] = { | |
1151 | { 6500000, | |
1152 | 13000000, | |
1153 | 19500000, | |
1154 | 26000000, | |
1155 | 39000000, | |
1156 | 52000000, | |
1157 | 58500000, | |
1158 | 65000000, | |
1159 | 78000000, | |
8fdd136f PT |
1160 | /* not in the spec, but some devices use this: */ |
1161 | 86500000, | |
db9c64cf JB |
1162 | }, |
1163 | { 13500000, | |
1164 | 27000000, | |
1165 | 40500000, | |
1166 | 54000000, | |
1167 | 81000000, | |
1168 | 108000000, | |
1169 | 121500000, | |
1170 | 135000000, | |
1171 | 162000000, | |
1172 | 180000000, | |
1173 | }, | |
1174 | { 29300000, | |
1175 | 58500000, | |
1176 | 87800000, | |
1177 | 117000000, | |
1178 | 175500000, | |
1179 | 234000000, | |
1180 | 263300000, | |
1181 | 292500000, | |
1182 | 351000000, | |
1183 | 390000000, | |
1184 | }, | |
1185 | { 58500000, | |
1186 | 117000000, | |
1187 | 175500000, | |
1188 | 234000000, | |
1189 | 351000000, | |
1190 | 468000000, | |
1191 | 526500000, | |
1192 | 585000000, | |
1193 | 702000000, | |
1194 | 780000000, | |
1195 | }, | |
1196 | }; | |
1197 | u32 bitrate; | |
1198 | int idx; | |
1199 | ||
ca8fe250 JB |
1200 | if (rate->mcs > 9) |
1201 | goto warn; | |
db9c64cf | 1202 | |
b51f3bee JB |
1203 | switch (rate->bw) { |
1204 | case RATE_INFO_BW_160: | |
1205 | idx = 3; | |
1206 | break; | |
1207 | case RATE_INFO_BW_80: | |
1208 | idx = 2; | |
1209 | break; | |
1210 | case RATE_INFO_BW_40: | |
1211 | idx = 1; | |
1212 | break; | |
1213 | case RATE_INFO_BW_5: | |
1214 | case RATE_INFO_BW_10: | |
1215 | default: | |
ca8fe250 | 1216 | goto warn; |
b51f3bee JB |
1217 | case RATE_INFO_BW_20: |
1218 | idx = 0; | |
1219 | } | |
db9c64cf JB |
1220 | |
1221 | bitrate = base[idx][rate->mcs]; | |
1222 | bitrate *= rate->nss; | |
1223 | ||
1224 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1225 | bitrate = (bitrate / 9) * 10; | |
1226 | ||
1227 | /* do NOT round down here */ | |
1228 | return (bitrate + 50000) / 100000; | |
ca8fe250 JB |
1229 | warn: |
1230 | WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", | |
1231 | rate->bw, rate->mcs, rate->nss); | |
1232 | return 0; | |
db9c64cf JB |
1233 | } |
1234 | ||
c4cbaf79 LC |
1235 | static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) |
1236 | { | |
1237 | #define SCALE 2048 | |
1238 | u16 mcs_divisors[12] = { | |
1239 | 34133, /* 16.666666... */ | |
1240 | 17067, /* 8.333333... */ | |
1241 | 11378, /* 5.555555... */ | |
1242 | 8533, /* 4.166666... */ | |
1243 | 5689, /* 2.777777... */ | |
1244 | 4267, /* 2.083333... */ | |
1245 | 3923, /* 1.851851... */ | |
1246 | 3413, /* 1.666666... */ | |
1247 | 2844, /* 1.388888... */ | |
1248 | 2560, /* 1.250000... */ | |
1249 | 2276, /* 1.111111... */ | |
1250 | 2048, /* 1.000000... */ | |
1251 | }; | |
1252 | u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; | |
1253 | u32 rates_969[3] = { 480388888, 453700000, 408333333 }; | |
1254 | u32 rates_484[3] = { 229411111, 216666666, 195000000 }; | |
1255 | u32 rates_242[3] = { 114711111, 108333333, 97500000 }; | |
1256 | u32 rates_106[3] = { 40000000, 37777777, 34000000 }; | |
1257 | u32 rates_52[3] = { 18820000, 17777777, 16000000 }; | |
1258 | u32 rates_26[3] = { 9411111, 8888888, 8000000 }; | |
1259 | u64 tmp; | |
1260 | u32 result; | |
1261 | ||
1262 | if (WARN_ON_ONCE(rate->mcs > 11)) | |
1263 | return 0; | |
1264 | ||
1265 | if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) | |
1266 | return 0; | |
1267 | if (WARN_ON_ONCE(rate->he_ru_alloc > | |
1268 | NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) | |
1269 | return 0; | |
1270 | if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) | |
1271 | return 0; | |
1272 | ||
1273 | if (rate->bw == RATE_INFO_BW_160) | |
1274 | result = rates_160M[rate->he_gi]; | |
1275 | else if (rate->bw == RATE_INFO_BW_80 || | |
1276 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1277 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) | |
1278 | result = rates_969[rate->he_gi]; | |
1279 | else if (rate->bw == RATE_INFO_BW_40 || | |
1280 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1281 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) | |
1282 | result = rates_484[rate->he_gi]; | |
1283 | else if (rate->bw == RATE_INFO_BW_20 || | |
1284 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1285 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) | |
1286 | result = rates_242[rate->he_gi]; | |
1287 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1288 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) | |
1289 | result = rates_106[rate->he_gi]; | |
1290 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1291 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) | |
1292 | result = rates_52[rate->he_gi]; | |
1293 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1294 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) | |
1295 | result = rates_26[rate->he_gi]; | |
344c9719 NC |
1296 | else { |
1297 | WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", | |
1298 | rate->bw, rate->he_ru_alloc); | |
c4cbaf79 | 1299 | return 0; |
344c9719 | 1300 | } |
c4cbaf79 LC |
1301 | |
1302 | /* now scale to the appropriate MCS */ | |
1303 | tmp = result; | |
1304 | tmp *= SCALE; | |
1305 | do_div(tmp, mcs_divisors[rate->mcs]); | |
1306 | result = tmp; | |
1307 | ||
1308 | /* and take NSS, DCM into account */ | |
1309 | result = (result * rate->nss) / 8; | |
1310 | if (rate->he_dcm) | |
1311 | result /= 2; | |
1312 | ||
25d16d12 | 1313 | return result / 10000; |
c4cbaf79 LC |
1314 | } |
1315 | ||
8eb41c8d | 1316 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa | 1317 | { |
0c1eca4e JB |
1318 | if (rate->flags & RATE_INFO_FLAGS_MCS) |
1319 | return cfg80211_calculate_bitrate_ht(rate); | |
2a38075c AAL |
1320 | if (rate->flags & RATE_INFO_FLAGS_DMG) |
1321 | return cfg80211_calculate_bitrate_dmg(rate); | |
1322 | if (rate->flags & RATE_INFO_FLAGS_EDMG) | |
1323 | return cfg80211_calculate_bitrate_edmg(rate); | |
db9c64cf JB |
1324 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1325 | return cfg80211_calculate_bitrate_vht(rate); | |
c4cbaf79 LC |
1326 | if (rate->flags & RATE_INFO_FLAGS_HE_MCS) |
1327 | return cfg80211_calculate_bitrate_he(rate); | |
254416aa | 1328 | |
0c1eca4e | 1329 | return rate->legacy; |
254416aa | 1330 | } |
8097e149 | 1331 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1332 | |
c216e641 AS |
1333 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1334 | enum ieee80211_p2p_attr_id attr, | |
1335 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1336 | { |
1337 | u8 *out = buf; | |
1338 | u16 attr_remaining = 0; | |
1339 | bool desired_attr = false; | |
1340 | u16 desired_len = 0; | |
1341 | ||
1342 | while (len > 0) { | |
1343 | unsigned int iedatalen; | |
1344 | unsigned int copy; | |
1345 | const u8 *iedata; | |
1346 | ||
1347 | if (len < 2) | |
1348 | return -EILSEQ; | |
1349 | iedatalen = ies[1]; | |
1350 | if (iedatalen + 2 > len) | |
1351 | return -EILSEQ; | |
1352 | ||
1353 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1354 | goto cont; | |
1355 | ||
1356 | if (iedatalen < 4) | |
1357 | goto cont; | |
1358 | ||
1359 | iedata = ies + 2; | |
1360 | ||
1361 | /* check WFA OUI, P2P subtype */ | |
1362 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1363 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1364 | goto cont; | |
1365 | ||
1366 | iedatalen -= 4; | |
1367 | iedata += 4; | |
1368 | ||
1369 | /* check attribute continuation into this IE */ | |
1370 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1371 | if (copy && desired_attr) { | |
1372 | desired_len += copy; | |
1373 | if (out) { | |
1374 | memcpy(out, iedata, min(bufsize, copy)); | |
1375 | out += min(bufsize, copy); | |
1376 | bufsize -= min(bufsize, copy); | |
1377 | } | |
1378 | ||
1379 | ||
1380 | if (copy == attr_remaining) | |
1381 | return desired_len; | |
1382 | } | |
1383 | ||
1384 | attr_remaining -= copy; | |
1385 | if (attr_remaining) | |
1386 | goto cont; | |
1387 | ||
1388 | iedatalen -= copy; | |
1389 | iedata += copy; | |
1390 | ||
1391 | while (iedatalen > 0) { | |
1392 | u16 attr_len; | |
1393 | ||
1394 | /* P2P attribute ID & size must fit */ | |
1395 | if (iedatalen < 3) | |
1396 | return -EILSEQ; | |
1397 | desired_attr = iedata[0] == attr; | |
1398 | attr_len = get_unaligned_le16(iedata + 1); | |
1399 | iedatalen -= 3; | |
1400 | iedata += 3; | |
1401 | ||
1402 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1403 | ||
1404 | if (desired_attr) { | |
1405 | desired_len += copy; | |
1406 | if (out) { | |
1407 | memcpy(out, iedata, min(bufsize, copy)); | |
1408 | out += min(bufsize, copy); | |
1409 | bufsize -= min(bufsize, copy); | |
1410 | } | |
1411 | ||
1412 | if (copy == attr_len) | |
1413 | return desired_len; | |
1414 | } | |
1415 | ||
1416 | iedata += copy; | |
1417 | iedatalen -= copy; | |
1418 | attr_remaining = attr_len - copy; | |
1419 | } | |
1420 | ||
1421 | cont: | |
1422 | len -= ies[1] + 2; | |
1423 | ies += ies[1] + 2; | |
1424 | } | |
1425 | ||
1426 | if (attr_remaining && desired_attr) | |
1427 | return -EILSEQ; | |
1428 | ||
1429 | return -ENOENT; | |
1430 | } | |
1431 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1432 | ||
2512b1b1 | 1433 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) |
29464ccc JB |
1434 | { |
1435 | int i; | |
1436 | ||
2512b1b1 LK |
1437 | /* Make sure array values are legal */ |
1438 | if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) | |
1439 | return false; | |
1440 | ||
1441 | i = 0; | |
1442 | while (i < n_ids) { | |
1443 | if (ids[i] == WLAN_EID_EXTENSION) { | |
1444 | if (id_ext && (ids[i + 1] == id)) | |
1445 | return true; | |
1446 | ||
1447 | i += 2; | |
1448 | continue; | |
1449 | } | |
1450 | ||
1451 | if (ids[i] == id && !id_ext) | |
29464ccc | 1452 | return true; |
2512b1b1 LK |
1453 | |
1454 | i++; | |
1455 | } | |
29464ccc JB |
1456 | return false; |
1457 | } | |
1458 | ||
8ac63448 JB |
1459 | static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
1460 | { | |
1461 | /* we assume a validly formed IEs buffer */ | |
1462 | u8 len = ies[pos + 1]; | |
1463 | ||
1464 | pos += 2 + len; | |
1465 | ||
1466 | /* the IE itself must have 255 bytes for fragments to follow */ | |
1467 | if (len < 255) | |
1468 | return pos; | |
1469 | ||
1470 | while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { | |
1471 | len = ies[pos + 1]; | |
1472 | pos += 2 + len; | |
1473 | } | |
1474 | ||
1475 | return pos; | |
1476 | } | |
1477 | ||
29464ccc JB |
1478 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
1479 | const u8 *ids, int n_ids, | |
1480 | const u8 *after_ric, int n_after_ric, | |
1481 | size_t offset) | |
1482 | { | |
1483 | size_t pos = offset; | |
1484 | ||
2512b1b1 LK |
1485 | while (pos < ielen) { |
1486 | u8 ext = 0; | |
1487 | ||
1488 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1489 | ext = 2; | |
1490 | if ((pos + ext) >= ielen) | |
1491 | break; | |
1492 | ||
1493 | if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], | |
1494 | ies[pos] == WLAN_EID_EXTENSION)) | |
1495 | break; | |
1496 | ||
29464ccc | 1497 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { |
8ac63448 | 1498 | pos = skip_ie(ies, ielen, pos); |
29464ccc | 1499 | |
2512b1b1 LK |
1500 | while (pos < ielen) { |
1501 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1502 | ext = 2; | |
1503 | else | |
1504 | ext = 0; | |
1505 | ||
1506 | if ((pos + ext) >= ielen) | |
1507 | break; | |
1508 | ||
1509 | if (!ieee80211_id_in_list(after_ric, | |
1510 | n_after_ric, | |
1511 | ies[pos + ext], | |
1512 | ext == 2)) | |
1513 | pos = skip_ie(ies, ielen, pos); | |
312ca38d JM |
1514 | else |
1515 | break; | |
2512b1b1 | 1516 | } |
29464ccc | 1517 | } else { |
8ac63448 | 1518 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1519 | } |
1520 | } | |
1521 | ||
1522 | return pos; | |
1523 | } | |
1524 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1525 | ||
1ce3e82b | 1526 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1527 | enum nl80211_band *band) |
1ce3e82b JB |
1528 | { |
1529 | switch (operating_class) { | |
1530 | case 112: | |
1531 | case 115 ... 127: | |
954a86ef | 1532 | case 128 ... 130: |
57fbcce3 | 1533 | *band = NL80211_BAND_5GHZ; |
1ce3e82b | 1534 | return true; |
852f0462 AS |
1535 | case 131 ... 135: |
1536 | *band = NL80211_BAND_6GHZ; | |
1537 | return true; | |
1ce3e82b JB |
1538 | case 81: |
1539 | case 82: | |
1540 | case 83: | |
1541 | case 84: | |
57fbcce3 | 1542 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1543 | return true; |
55300a13 | 1544 | case 180: |
57fbcce3 | 1545 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1546 | return true; |
1ce3e82b JB |
1547 | } |
1548 | ||
1549 | return false; | |
1550 | } | |
1551 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1552 | ||
a38700dd AN |
1553 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1554 | u8 *op_class) | |
1555 | { | |
1556 | u8 vht_opclass; | |
8442938c | 1557 | u32 freq = chandef->center_freq1; |
a38700dd AN |
1558 | |
1559 | if (freq >= 2412 && freq <= 2472) { | |
1560 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1561 | return false; | |
1562 | ||
1563 | /* 2.407 GHz, channels 1..13 */ | |
1564 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1565 | if (freq > chandef->chan->center_freq) | |
1566 | *op_class = 83; /* HT40+ */ | |
1567 | else | |
1568 | *op_class = 84; /* HT40- */ | |
1569 | } else { | |
1570 | *op_class = 81; | |
1571 | } | |
1572 | ||
1573 | return true; | |
1574 | } | |
1575 | ||
1576 | if (freq == 2484) { | |
ec649fed MH |
1577 | /* channel 14 is only for IEEE 802.11b */ |
1578 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
a38700dd AN |
1579 | return false; |
1580 | ||
1581 | *op_class = 82; /* channel 14 */ | |
1582 | return true; | |
1583 | } | |
1584 | ||
1585 | switch (chandef->width) { | |
1586 | case NL80211_CHAN_WIDTH_80: | |
1587 | vht_opclass = 128; | |
1588 | break; | |
1589 | case NL80211_CHAN_WIDTH_160: | |
1590 | vht_opclass = 129; | |
1591 | break; | |
1592 | case NL80211_CHAN_WIDTH_80P80: | |
1593 | vht_opclass = 130; | |
1594 | break; | |
1595 | case NL80211_CHAN_WIDTH_10: | |
1596 | case NL80211_CHAN_WIDTH_5: | |
1597 | return false; /* unsupported for now */ | |
1598 | default: | |
1599 | vht_opclass = 0; | |
1600 | break; | |
1601 | } | |
1602 | ||
1603 | /* 5 GHz, channels 36..48 */ | |
1604 | if (freq >= 5180 && freq <= 5240) { | |
1605 | if (vht_opclass) { | |
1606 | *op_class = vht_opclass; | |
1607 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1608 | if (freq > chandef->chan->center_freq) | |
1609 | *op_class = 116; | |
1610 | else | |
1611 | *op_class = 117; | |
1612 | } else { | |
1613 | *op_class = 115; | |
1614 | } | |
1615 | ||
1616 | return true; | |
1617 | } | |
1618 | ||
1619 | /* 5 GHz, channels 52..64 */ | |
1620 | if (freq >= 5260 && freq <= 5320) { | |
1621 | if (vht_opclass) { | |
1622 | *op_class = vht_opclass; | |
1623 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1624 | if (freq > chandef->chan->center_freq) | |
1625 | *op_class = 119; | |
1626 | else | |
1627 | *op_class = 120; | |
1628 | } else { | |
1629 | *op_class = 118; | |
1630 | } | |
1631 | ||
1632 | return true; | |
1633 | } | |
1634 | ||
1635 | /* 5 GHz, channels 100..144 */ | |
1636 | if (freq >= 5500 && freq <= 5720) { | |
1637 | if (vht_opclass) { | |
1638 | *op_class = vht_opclass; | |
1639 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1640 | if (freq > chandef->chan->center_freq) | |
1641 | *op_class = 122; | |
1642 | else | |
1643 | *op_class = 123; | |
1644 | } else { | |
1645 | *op_class = 121; | |
1646 | } | |
1647 | ||
1648 | return true; | |
1649 | } | |
1650 | ||
1651 | /* 5 GHz, channels 149..169 */ | |
1652 | if (freq >= 5745 && freq <= 5845) { | |
1653 | if (vht_opclass) { | |
1654 | *op_class = vht_opclass; | |
1655 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1656 | if (freq > chandef->chan->center_freq) | |
1657 | *op_class = 126; | |
1658 | else | |
1659 | *op_class = 127; | |
1660 | } else if (freq <= 5805) { | |
1661 | *op_class = 124; | |
1662 | } else { | |
1663 | *op_class = 125; | |
1664 | } | |
1665 | ||
1666 | return true; | |
1667 | } | |
1668 | ||
1669 | /* 56.16 GHz, channel 1..4 */ | |
9cf0a0b4 | 1670 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { |
a38700dd AN |
1671 | if (chandef->width >= NL80211_CHAN_WIDTH_40) |
1672 | return false; | |
1673 | ||
1674 | *op_class = 180; | |
1675 | return true; | |
1676 | } | |
1677 | ||
1678 | /* not supported yet */ | |
1679 | return false; | |
1680 | } | |
1681 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1682 | ||
4c8dea63 JB |
1683 | static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
1684 | u32 *beacon_int_gcd, | |
1685 | bool *beacon_int_different) | |
56d1893d JB |
1686 | { |
1687 | struct wireless_dev *wdev; | |
56d1893d | 1688 | |
4c8dea63 JB |
1689 | *beacon_int_gcd = 0; |
1690 | *beacon_int_different = false; | |
56d1893d | 1691 | |
4c8dea63 | 1692 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
56d1893d JB |
1693 | if (!wdev->beacon_interval) |
1694 | continue; | |
0c317a02 | 1695 | |
4c8dea63 JB |
1696 | if (!*beacon_int_gcd) { |
1697 | *beacon_int_gcd = wdev->beacon_interval; | |
0c317a02 | 1698 | continue; |
4c8dea63 | 1699 | } |
0c317a02 | 1700 | |
4c8dea63 | 1701 | if (wdev->beacon_interval == *beacon_int_gcd) |
0c317a02 PK |
1702 | continue; |
1703 | ||
4c8dea63 JB |
1704 | *beacon_int_different = true; |
1705 | *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); | |
1706 | } | |
0c317a02 | 1707 | |
4c8dea63 JB |
1708 | if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
1709 | if (*beacon_int_gcd) | |
1710 | *beacon_int_different = true; | |
1711 | *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); | |
56d1893d | 1712 | } |
4c8dea63 | 1713 | } |
56d1893d | 1714 | |
4c8dea63 JB |
1715 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1716 | enum nl80211_iftype iftype, u32 beacon_int) | |
1717 | { | |
1718 | /* | |
1719 | * This is just a basic pre-condition check; if interface combinations | |
1720 | * are possible the driver must already be checking those with a call | |
1721 | * to cfg80211_check_combinations(), in which case we'll validate more | |
1722 | * through the cfg80211_calculate_bi_data() call and code in | |
1723 | * cfg80211_iter_combinations(). | |
1724 | */ | |
1725 | ||
1726 | if (beacon_int < 10 || beacon_int > 10000) | |
1727 | return -EINVAL; | |
1728 | ||
1729 | return 0; | |
56d1893d | 1730 | } |
7527a782 | 1731 | |
65a124dd | 1732 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
e227300c | 1733 | struct iface_combination_params *params, |
65a124dd MK |
1734 | void (*iter)(const struct ieee80211_iface_combination *c, |
1735 | void *data), | |
1736 | void *data) | |
cb2d956d | 1737 | { |
8c48b50a FF |
1738 | const struct ieee80211_regdomain *regdom; |
1739 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1740 | int i, j, iftype; |
1741 | int num_interfaces = 0; | |
1742 | u32 used_iftypes = 0; | |
4c8dea63 JB |
1743 | u32 beacon_int_gcd; |
1744 | bool beacon_int_different; | |
1745 | ||
1746 | /* | |
1747 | * This is a bit strange, since the iteration used to rely only on | |
1748 | * the data given by the driver, but here it now relies on context, | |
1749 | * in form of the currently operating interfaces. | |
1750 | * This is OK for all current users, and saves us from having to | |
1751 | * push the GCD calculations into all the drivers. | |
1752 | * In the future, this should probably rely more on data that's in | |
1753 | * cfg80211 already - the only thing not would appear to be any new | |
1754 | * interfaces (while being brought up) and channel/radar data. | |
1755 | */ | |
1756 | cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, | |
1757 | &beacon_int_gcd, &beacon_int_different); | |
cb2d956d | 1758 | |
e227300c | 1759 | if (params->radar_detect) { |
8c48b50a FF |
1760 | rcu_read_lock(); |
1761 | regdom = rcu_dereference(cfg80211_regdomain); | |
1762 | if (regdom) | |
1763 | region = regdom->dfs_region; | |
1764 | rcu_read_unlock(); | |
1765 | } | |
1766 | ||
cb2d956d | 1767 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
e227300c PK |
1768 | num_interfaces += params->iftype_num[iftype]; |
1769 | if (params->iftype_num[iftype] > 0 && | |
e6f40511 | 1770 | !cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
cb2d956d LC |
1771 | used_iftypes |= BIT(iftype); |
1772 | } | |
1773 | ||
1774 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1775 | const struct ieee80211_iface_combination *c; | |
1776 | struct ieee80211_iface_limit *limits; | |
1777 | u32 all_iftypes = 0; | |
1778 | ||
1779 | c = &wiphy->iface_combinations[i]; | |
1780 | ||
1781 | if (num_interfaces > c->max_interfaces) | |
1782 | continue; | |
e227300c | 1783 | if (params->num_different_channels > c->num_different_channels) |
cb2d956d LC |
1784 | continue; |
1785 | ||
1786 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1787 | GFP_KERNEL); | |
1788 | if (!limits) | |
1789 | return -ENOMEM; | |
1790 | ||
1791 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
e6f40511 | 1792 | if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
cb2d956d LC |
1793 | continue; |
1794 | for (j = 0; j < c->n_limits; j++) { | |
1795 | all_iftypes |= limits[j].types; | |
1796 | if (!(limits[j].types & BIT(iftype))) | |
1797 | continue; | |
e227300c | 1798 | if (limits[j].max < params->iftype_num[iftype]) |
cb2d956d | 1799 | goto cont; |
e227300c | 1800 | limits[j].max -= params->iftype_num[iftype]; |
cb2d956d LC |
1801 | } |
1802 | } | |
1803 | ||
e227300c PK |
1804 | if (params->radar_detect != |
1805 | (c->radar_detect_widths & params->radar_detect)) | |
cb2d956d LC |
1806 | goto cont; |
1807 | ||
e227300c | 1808 | if (params->radar_detect && c->radar_detect_regions && |
8c48b50a FF |
1809 | !(c->radar_detect_regions & BIT(region))) |
1810 | goto cont; | |
1811 | ||
cb2d956d LC |
1812 | /* Finally check that all iftypes that we're currently |
1813 | * using are actually part of this combination. If they | |
1814 | * aren't then we can't use this combination and have | |
1815 | * to continue to the next. | |
1816 | */ | |
1817 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1818 | goto cont; | |
1819 | ||
4c8dea63 | 1820 | if (beacon_int_gcd) { |
0c317a02 | 1821 | if (c->beacon_int_min_gcd && |
4c8dea63 | 1822 | beacon_int_gcd < c->beacon_int_min_gcd) |
0507a3ac | 1823 | goto cont; |
4c8dea63 | 1824 | if (!c->beacon_int_min_gcd && beacon_int_different) |
0c317a02 PK |
1825 | goto cont; |
1826 | } | |
1827 | ||
cb2d956d LC |
1828 | /* This combination covered all interface types and |
1829 | * supported the requested numbers, so we're good. | |
1830 | */ | |
65a124dd MK |
1831 | |
1832 | (*iter)(c, data); | |
cb2d956d LC |
1833 | cont: |
1834 | kfree(limits); | |
1835 | } | |
1836 | ||
65a124dd MK |
1837 | return 0; |
1838 | } | |
1839 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1840 | ||
1841 | static void | |
1842 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1843 | void *data) | |
1844 | { | |
1845 | int *num = data; | |
1846 | (*num)++; | |
1847 | } | |
1848 | ||
1849 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
e227300c | 1850 | struct iface_combination_params *params) |
65a124dd MK |
1851 | { |
1852 | int err, num = 0; | |
1853 | ||
e227300c | 1854 | err = cfg80211_iter_combinations(wiphy, params, |
65a124dd MK |
1855 | cfg80211_iter_sum_ifcombs, &num); |
1856 | if (err) | |
1857 | return err; | |
1858 | if (num == 0) | |
1859 | return -EBUSY; | |
1860 | ||
1861 | return 0; | |
cb2d956d LC |
1862 | } |
1863 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1864 | ||
34850ab2 JB |
1865 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1866 | const u8 *rates, unsigned int n_rates, | |
1867 | u32 *mask) | |
1868 | { | |
1869 | int i, j; | |
1870 | ||
a401d2bb JB |
1871 | if (!sband) |
1872 | return -EINVAL; | |
1873 | ||
34850ab2 JB |
1874 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1875 | return -EINVAL; | |
1876 | ||
1877 | *mask = 0; | |
1878 | ||
1879 | for (i = 0; i < n_rates; i++) { | |
1880 | int rate = (rates[i] & 0x7f) * 5; | |
1881 | bool found = false; | |
1882 | ||
1883 | for (j = 0; j < sband->n_bitrates; j++) { | |
1884 | if (sband->bitrates[j].bitrate == rate) { | |
1885 | found = true; | |
1886 | *mask |= BIT(j); | |
1887 | break; | |
1888 | } | |
1889 | } | |
1890 | if (!found) | |
1891 | return -EINVAL; | |
1892 | } | |
1893 | ||
1894 | /* | |
1895 | * mask must have at least one bit set here since we | |
1896 | * didn't accept a 0-length rates array nor allowed | |
1897 | * entries in the array that didn't exist | |
1898 | */ | |
1899 | ||
1900 | return 0; | |
1901 | } | |
11a2a357 | 1902 | |
bdfbec2d IP |
1903 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1904 | { | |
57fbcce3 | 1905 | enum nl80211_band band; |
bdfbec2d IP |
1906 | unsigned int n_channels = 0; |
1907 | ||
57fbcce3 | 1908 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1909 | if (wiphy->bands[band]) |
1910 | n_channels += wiphy->bands[band]->n_channels; | |
1911 | ||
1912 | return n_channels; | |
1913 | } | |
1914 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1915 | ||
7406353d AQ |
1916 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1917 | struct station_info *sinfo) | |
1918 | { | |
1919 | struct cfg80211_registered_device *rdev; | |
1920 | struct wireless_dev *wdev; | |
1921 | ||
1922 | wdev = dev->ieee80211_ptr; | |
1923 | if (!wdev) | |
1924 | return -EOPNOTSUPP; | |
1925 | ||
1926 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1927 | if (!rdev->ops->get_station) | |
1928 | return -EOPNOTSUPP; | |
1929 | ||
3c12d048 SE |
1930 | memset(sinfo, 0, sizeof(*sinfo)); |
1931 | ||
7406353d AQ |
1932 | return rdev_get_station(rdev, dev, mac_addr, sinfo); |
1933 | } | |
1934 | EXPORT_SYMBOL(cfg80211_get_station); | |
1935 | ||
a442b761 AB |
1936 | void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
1937 | { | |
1938 | int i; | |
1939 | ||
1940 | if (!f) | |
1941 | return; | |
1942 | ||
1943 | kfree(f->serv_spec_info); | |
1944 | kfree(f->srf_bf); | |
1945 | kfree(f->srf_macs); | |
1946 | for (i = 0; i < f->num_rx_filters; i++) | |
1947 | kfree(f->rx_filters[i].filter); | |
1948 | ||
1949 | for (i = 0; i < f->num_tx_filters; i++) | |
1950 | kfree(f->tx_filters[i].filter); | |
1951 | ||
1952 | kfree(f->rx_filters); | |
1953 | kfree(f->tx_filters); | |
1954 | kfree(f); | |
1955 | } | |
1956 | EXPORT_SYMBOL(cfg80211_free_nan_func); | |
1957 | ||
4787cfa0 RM |
1958 | bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
1959 | u32 center_freq_khz, u32 bw_khz) | |
1960 | { | |
1961 | u32 start_freq_khz, end_freq_khz; | |
1962 | ||
1963 | start_freq_khz = center_freq_khz - (bw_khz / 2); | |
1964 | end_freq_khz = center_freq_khz + (bw_khz / 2); | |
1965 | ||
1966 | if (start_freq_khz >= freq_range->start_freq_khz && | |
1967 | end_freq_khz <= freq_range->end_freq_khz) | |
1968 | return true; | |
1969 | ||
1970 | return false; | |
1971 | } | |
1972 | ||
8689c051 AS |
1973 | int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) |
1974 | { | |
1d211d43 JB |
1975 | sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1, |
1976 | sizeof(*(sinfo->pertid)), | |
1977 | gfp); | |
8689c051 AS |
1978 | if (!sinfo->pertid) |
1979 | return -ENOMEM; | |
1980 | ||
1981 | return 0; | |
1982 | } | |
1983 | EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); | |
1984 | ||
11a2a357 JB |
1985 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1986 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1987 | const unsigned char rfc1042_header[] __aligned(2) = | |
1988 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1989 | EXPORT_SYMBOL(rfc1042_header); | |
1990 | ||
1991 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1992 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1993 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1994 | EXPORT_SYMBOL(bridge_tunnel_header); | |
30ca1aa5 DL |
1995 | |
1996 | /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ | |
1997 | struct iapp_layer2_update { | |
1998 | u8 da[ETH_ALEN]; /* broadcast */ | |
1999 | u8 sa[ETH_ALEN]; /* STA addr */ | |
2000 | __be16 len; /* 6 */ | |
2001 | u8 dsap; /* 0 */ | |
2002 | u8 ssap; /* 0 */ | |
2003 | u8 control; | |
2004 | u8 xid_info[3]; | |
2005 | } __packed; | |
2006 | ||
2007 | void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) | |
2008 | { | |
2009 | struct iapp_layer2_update *msg; | |
2010 | struct sk_buff *skb; | |
2011 | ||
2012 | /* Send Level 2 Update Frame to update forwarding tables in layer 2 | |
2013 | * bridge devices */ | |
2014 | ||
2015 | skb = dev_alloc_skb(sizeof(*msg)); | |
2016 | if (!skb) | |
2017 | return; | |
2018 | msg = skb_put(skb, sizeof(*msg)); | |
2019 | ||
2020 | /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) | |
2021 | * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ | |
2022 | ||
2023 | eth_broadcast_addr(msg->da); | |
2024 | ether_addr_copy(msg->sa, addr); | |
2025 | msg->len = htons(6); | |
2026 | msg->dsap = 0; | |
2027 | msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ | |
2028 | msg->control = 0xaf; /* XID response lsb.1111F101. | |
2029 | * F=0 (no poll command; unsolicited frame) */ | |
2030 | msg->xid_info[0] = 0x81; /* XID format identifier */ | |
2031 | msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ | |
2032 | msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ | |
2033 | ||
2034 | skb->dev = dev; | |
2035 | skb->protocol = eth_type_trans(skb, dev); | |
2036 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2037 | netif_rx_ni(skb); | |
2038 | } | |
2039 | EXPORT_SYMBOL(cfg80211_send_layer2_update); | |
b0aa75f0 JB |
2040 | |
2041 | int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, | |
2042 | enum ieee80211_vht_chanwidth bw, | |
9166cc49 JB |
2043 | int mcs, bool ext_nss_bw_capable, |
2044 | unsigned int max_vht_nss) | |
b0aa75f0 JB |
2045 | { |
2046 | u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); | |
b0aa75f0 JB |
2047 | int ext_nss_bw; |
2048 | int supp_width; | |
2049 | int i, mcs_encoding; | |
2050 | ||
2051 | if (map == 0xffff) | |
2052 | return 0; | |
2053 | ||
9166cc49 | 2054 | if (WARN_ON(mcs > 9 || max_vht_nss > 8)) |
b0aa75f0 JB |
2055 | return 0; |
2056 | if (mcs <= 7) | |
2057 | mcs_encoding = 0; | |
2058 | else if (mcs == 8) | |
2059 | mcs_encoding = 1; | |
2060 | else | |
2061 | mcs_encoding = 2; | |
2062 | ||
9166cc49 JB |
2063 | if (!max_vht_nss) { |
2064 | /* find max_vht_nss for the given MCS */ | |
2065 | for (i = 7; i >= 0; i--) { | |
2066 | int supp = (map >> (2 * i)) & 3; | |
b0aa75f0 | 2067 | |
9166cc49 JB |
2068 | if (supp == 3) |
2069 | continue; | |
b0aa75f0 | 2070 | |
9166cc49 JB |
2071 | if (supp >= mcs_encoding) { |
2072 | max_vht_nss = i + 1; | |
2073 | break; | |
2074 | } | |
b0aa75f0 JB |
2075 | } |
2076 | } | |
2077 | ||
2078 | if (!(cap->supp_mcs.tx_mcs_map & | |
2079 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) | |
2080 | return max_vht_nss; | |
2081 | ||
2082 | ext_nss_bw = le32_get_bits(cap->vht_cap_info, | |
2083 | IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); | |
2084 | supp_width = le32_get_bits(cap->vht_cap_info, | |
2085 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); | |
2086 | ||
2087 | /* if not capable, treat ext_nss_bw as 0 */ | |
2088 | if (!ext_nss_bw_capable) | |
2089 | ext_nss_bw = 0; | |
2090 | ||
2091 | /* This is invalid */ | |
2092 | if (supp_width == 3) | |
2093 | return 0; | |
2094 | ||
2095 | /* This is an invalid combination so pretend nothing is supported */ | |
2096 | if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
2097 | return 0; | |
2098 | ||
2099 | /* | |
2100 | * Cover all the special cases according to IEEE 802.11-2016 | |
2101 | * Table 9-250. All other cases are either factor of 1 or not | |
2102 | * valid/supported. | |
2103 | */ | |
2104 | switch (bw) { | |
2105 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
2106 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
2107 | if ((supp_width == 1 || supp_width == 2) && | |
2108 | ext_nss_bw == 3) | |
2109 | return 2 * max_vht_nss; | |
2110 | break; | |
2111 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
2112 | if (supp_width == 0 && | |
2113 | (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
93bc8ac4 | 2114 | return max_vht_nss / 2; |
b0aa75f0 JB |
2115 | if (supp_width == 0 && |
2116 | ext_nss_bw == 3) | |
93bc8ac4 | 2117 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2118 | if (supp_width == 1 && |
2119 | ext_nss_bw == 3) | |
2120 | return 2 * max_vht_nss; | |
2121 | break; | |
2122 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
93bc8ac4 | 2123 | if (supp_width == 0 && ext_nss_bw == 1) |
b0aa75f0 JB |
2124 | return 0; /* not possible */ |
2125 | if (supp_width == 0 && | |
2126 | ext_nss_bw == 2) | |
93bc8ac4 | 2127 | return max_vht_nss / 2; |
b0aa75f0 JB |
2128 | if (supp_width == 0 && |
2129 | ext_nss_bw == 3) | |
93bc8ac4 | 2130 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2131 | if (supp_width == 1 && |
2132 | ext_nss_bw == 0) | |
2133 | return 0; /* not possible */ | |
2134 | if (supp_width == 1 && | |
2135 | ext_nss_bw == 1) | |
93bc8ac4 | 2136 | return max_vht_nss / 2; |
b0aa75f0 JB |
2137 | if (supp_width == 1 && |
2138 | ext_nss_bw == 2) | |
93bc8ac4 | 2139 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2140 | break; |
2141 | } | |
2142 | ||
2143 | /* not covered or invalid combination received */ | |
2144 | return max_vht_nss; | |
2145 | } | |
2146 | EXPORT_SYMBOL(ieee80211_get_vht_max_nss); | |
e6f40511 MP |
2147 | |
2148 | bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype, | |
2149 | bool is_4addr, u8 check_swif) | |
2150 | ||
2151 | { | |
2152 | bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN; | |
2153 | ||
2154 | switch (check_swif) { | |
2155 | case 0: | |
2156 | if (is_vlan && is_4addr) | |
2157 | return wiphy->flags & WIPHY_FLAG_4ADDR_AP; | |
2158 | return wiphy->interface_modes & BIT(iftype); | |
2159 | case 1: | |
2160 | if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan) | |
2161 | return wiphy->flags & WIPHY_FLAG_4ADDR_AP; | |
2162 | return wiphy->software_iftypes & BIT(iftype); | |
2163 | default: | |
2164 | break; | |
2165 | } | |
2166 | ||
2167 | return false; | |
2168 | } | |
2169 | EXPORT_SYMBOL(cfg80211_iftype_allowed); |