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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; | |
fa1f1085 AS |
94 | case NL80211_BAND_6GHZ: |
95 | /* see 802.11ax D4.1 27.3.22.2 */ | |
96 | if (chan <= 253) | |
97 | return 5940 + chan * 5; | |
98 | break; | |
57fbcce3 | 99 | case NL80211_BAND_60GHZ: |
9cf0a0b4 | 100 | if (chan < 7) |
3a0c52a6 VK |
101 | return 56160 + chan * 2160; |
102 | break; | |
103 | default: | |
104 | ; | |
59eb21a6 | 105 | } |
3a0c52a6 | 106 | return 0; /* not supported */ |
8318d78a JB |
107 | } |
108 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
109 | ||
110 | int ieee80211_frequency_to_channel(int freq) | |
111 | { | |
59eb21a6 | 112 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
113 | if (freq == 2484) |
114 | return 14; | |
59eb21a6 | 115 | else if (freq < 2484) |
8318d78a | 116 | return (freq - 2407) / 5; |
59eb21a6 BR |
117 | else if (freq >= 4910 && freq <= 4980) |
118 | return (freq - 4000) / 5; | |
df5d7a88 | 119 | else if (freq < 5945) |
59eb21a6 | 120 | return (freq - 5000) / 5; |
fa1f1085 AS |
121 | else if (freq <= 45000) /* DMG band lower limit */ |
122 | /* see 802.11ax D4.1 27.3.22.2 */ | |
123 | return (freq - 5940) / 5; | |
9cf0a0b4 | 124 | else if (freq >= 58320 && freq <= 70200) |
3a0c52a6 VK |
125 | return (freq - 56160) / 2160; |
126 | else | |
127 | return 0; | |
8318d78a JB |
128 | } |
129 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
130 | ||
543b921b | 131 | struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq) |
906c730a | 132 | { |
57fbcce3 | 133 | enum nl80211_band band; |
906c730a JB |
134 | struct ieee80211_supported_band *sband; |
135 | int i; | |
136 | ||
57fbcce3 | 137 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
138 | sband = wiphy->bands[band]; |
139 | ||
140 | if (!sband) | |
141 | continue; | |
142 | ||
143 | for (i = 0; i < sband->n_channels; i++) { | |
144 | if (sband->channels[i].center_freq == freq) | |
145 | return &sband->channels[i]; | |
146 | } | |
147 | } | |
148 | ||
149 | return NULL; | |
150 | } | |
543b921b | 151 | EXPORT_SYMBOL(ieee80211_get_channel); |
906c730a | 152 | |
343884c8 | 153 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
8318d78a JB |
154 | { |
155 | int i, want; | |
156 | ||
343884c8 | 157 | switch (sband->band) { |
57fbcce3 | 158 | case NL80211_BAND_5GHZ: |
62524a58 | 159 | case NL80211_BAND_6GHZ: |
8318d78a JB |
160 | want = 3; |
161 | for (i = 0; i < sband->n_bitrates; i++) { | |
162 | if (sband->bitrates[i].bitrate == 60 || | |
163 | sband->bitrates[i].bitrate == 120 || | |
164 | sband->bitrates[i].bitrate == 240) { | |
165 | sband->bitrates[i].flags |= | |
166 | IEEE80211_RATE_MANDATORY_A; | |
167 | want--; | |
168 | } | |
169 | } | |
170 | WARN_ON(want); | |
171 | break; | |
57fbcce3 | 172 | case NL80211_BAND_2GHZ: |
8318d78a JB |
173 | want = 7; |
174 | for (i = 0; i < sband->n_bitrates; i++) { | |
1bd773c0 RS |
175 | switch (sband->bitrates[i].bitrate) { |
176 | case 10: | |
177 | case 20: | |
178 | case 55: | |
179 | case 110: | |
8318d78a JB |
180 | sband->bitrates[i].flags |= |
181 | IEEE80211_RATE_MANDATORY_B | | |
182 | IEEE80211_RATE_MANDATORY_G; | |
183 | want--; | |
1bd773c0 RS |
184 | break; |
185 | case 60: | |
186 | case 120: | |
187 | case 240: | |
8318d78a JB |
188 | sband->bitrates[i].flags |= |
189 | IEEE80211_RATE_MANDATORY_G; | |
190 | want--; | |
1bd773c0 RS |
191 | /* fall through */ |
192 | default: | |
8318d78a JB |
193 | sband->bitrates[i].flags |= |
194 | IEEE80211_RATE_ERP_G; | |
1bd773c0 RS |
195 | break; |
196 | } | |
8318d78a | 197 | } |
1bd773c0 | 198 | WARN_ON(want != 0 && want != 3); |
8318d78a | 199 | break; |
57fbcce3 | 200 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
201 | /* check for mandatory HT MCS 1..4 */ |
202 | WARN_ON(!sband->ht_cap.ht_supported); | |
203 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
204 | break; | |
57fbcce3 | 205 | case NUM_NL80211_BANDS: |
343884c8 | 206 | default: |
8318d78a JB |
207 | WARN_ON(1); |
208 | break; | |
209 | } | |
210 | } | |
211 | ||
212 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
213 | { | |
57fbcce3 | 214 | enum nl80211_band band; |
8318d78a | 215 | |
57fbcce3 | 216 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a | 217 | if (wiphy->bands[band]) |
343884c8 | 218 | set_mandatory_flags_band(wiphy->bands[band]); |
8318d78a | 219 | } |
08645126 | 220 | |
38ba3c57 JM |
221 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
222 | { | |
223 | int i; | |
224 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
225 | if (cipher == wiphy->cipher_suites[i]) | |
226 | return true; | |
227 | return false; | |
228 | } | |
229 | ||
fffd0934 JB |
230 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
231 | struct key_params *params, int key_idx, | |
e31b8213 | 232 | bool pairwise, const u8 *mac_addr) |
08645126 | 233 | { |
56be393f JM |
234 | int max_key_idx = 5; |
235 | ||
236 | if (wiphy_ext_feature_isset(&rdev->wiphy, | |
237 | NL80211_EXT_FEATURE_BEACON_PROTECTION)) | |
238 | max_key_idx = 7; | |
239 | if (key_idx < 0 || key_idx > max_key_idx) | |
08645126 JB |
240 | return -EINVAL; |
241 | ||
e31b8213 JB |
242 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
243 | return -EINVAL; | |
244 | ||
245 | if (pairwise && !mac_addr) | |
246 | return -EINVAL; | |
247 | ||
37720569 JM |
248 | switch (params->cipher) { |
249 | case WLAN_CIPHER_SUITE_TKIP: | |
b67fd72e AW |
250 | /* Extended Key ID can only be used with CCMP/GCMP ciphers */ |
251 | if ((pairwise && key_idx) || | |
252 | params->mode != NL80211_KEY_RX_TX) | |
253 | return -EINVAL; | |
254 | break; | |
37720569 | 255 | case WLAN_CIPHER_SUITE_CCMP: |
cfcf1682 JM |
256 | case WLAN_CIPHER_SUITE_CCMP_256: |
257 | case WLAN_CIPHER_SUITE_GCMP: | |
258 | case WLAN_CIPHER_SUITE_GCMP_256: | |
b67fd72e AW |
259 | /* IEEE802.11-2016 allows only 0 and - when supporting |
260 | * Extended Key ID - 1 as index for pairwise keys. | |
6cdd3979 AW |
261 | * @NL80211_KEY_NO_TX is only allowed for pairwise keys when |
262 | * the driver supports Extended Key ID. | |
263 | * @NL80211_KEY_SET_TX can't be set when installing and | |
264 | * validating a key. | |
37720569 | 265 | */ |
b67fd72e AW |
266 | if ((params->mode == NL80211_KEY_NO_TX && !pairwise) || |
267 | params->mode == NL80211_KEY_SET_TX) | |
268 | return -EINVAL; | |
269 | if (wiphy_ext_feature_isset(&rdev->wiphy, | |
270 | NL80211_EXT_FEATURE_EXT_KEY_ID)) { | |
271 | if (pairwise && (key_idx < 0 || key_idx > 1)) | |
6cdd3979 | 272 | return -EINVAL; |
b67fd72e | 273 | } else if (pairwise && key_idx) { |
37720569 | 274 | return -EINVAL; |
6cdd3979 | 275 | } |
37720569 JM |
276 | break; |
277 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
278 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
279 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
280 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
281 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
282 | if (pairwise) | |
283 | return -EINVAL; | |
e9c8f8d3 JB |
284 | if (key_idx < 4) |
285 | return -EINVAL; | |
37720569 | 286 | break; |
e9c8f8d3 JB |
287 | case WLAN_CIPHER_SUITE_WEP40: |
288 | case WLAN_CIPHER_SUITE_WEP104: | |
289 | if (key_idx > 3) | |
290 | return -EINVAL; | |
37720569 JM |
291 | default: |
292 | break; | |
293 | } | |
08645126 | 294 | |
08645126 JB |
295 | switch (params->cipher) { |
296 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 297 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
298 | return -EINVAL; |
299 | break; | |
300 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 301 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
302 | return -EINVAL; |
303 | break; | |
304 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 305 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
306 | return -EINVAL; |
307 | break; | |
cfcf1682 JM |
308 | case WLAN_CIPHER_SUITE_CCMP_256: |
309 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
310 | return -EINVAL; | |
311 | break; | |
312 | case WLAN_CIPHER_SUITE_GCMP: | |
313 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
314 | return -EINVAL; | |
315 | break; | |
316 | case WLAN_CIPHER_SUITE_GCMP_256: | |
317 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
318 | return -EINVAL; | |
319 | break; | |
08645126 | 320 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 321 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
322 | return -EINVAL; |
323 | break; | |
324 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 325 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
326 | return -EINVAL; |
327 | break; | |
cfcf1682 JM |
328 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
329 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
330 | return -EINVAL; | |
331 | break; | |
332 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
333 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
334 | return -EINVAL; | |
335 | break; | |
336 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
337 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
338 | return -EINVAL; | |
339 | break; | |
08645126 | 340 | default: |
7d64b7cc JB |
341 | /* |
342 | * We don't know anything about this algorithm, | |
343 | * allow using it -- but the driver must check | |
344 | * all parameters! We still check below whether | |
345 | * or not the driver supports this algorithm, | |
346 | * of course. | |
347 | */ | |
348 | break; | |
08645126 JB |
349 | } |
350 | ||
9f26a952 JM |
351 | if (params->seq) { |
352 | switch (params->cipher) { | |
353 | case WLAN_CIPHER_SUITE_WEP40: | |
354 | case WLAN_CIPHER_SUITE_WEP104: | |
355 | /* These ciphers do not use key sequence */ | |
356 | return -EINVAL; | |
357 | case WLAN_CIPHER_SUITE_TKIP: | |
358 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
359 | case WLAN_CIPHER_SUITE_CCMP_256: |
360 | case WLAN_CIPHER_SUITE_GCMP: | |
361 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 362 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
363 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
364 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
365 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
366 | if (params->seq_len != 6) |
367 | return -EINVAL; | |
368 | break; | |
369 | } | |
370 | } | |
371 | ||
38ba3c57 | 372 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
373 | return -EINVAL; |
374 | ||
08645126 JB |
375 | return 0; |
376 | } | |
e31a16d6 | 377 | |
633adf1a | 378 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
379 | { |
380 | unsigned int hdrlen = 24; | |
381 | ||
382 | if (ieee80211_is_data(fc)) { | |
383 | if (ieee80211_has_a4(fc)) | |
384 | hdrlen = 30; | |
d0dd2de0 | 385 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 386 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
387 | if (ieee80211_has_order(fc)) |
388 | hdrlen += IEEE80211_HT_CTL_LEN; | |
389 | } | |
e31a16d6 ZY |
390 | goto out; |
391 | } | |
392 | ||
fb142f4b FC |
393 | if (ieee80211_is_mgmt(fc)) { |
394 | if (ieee80211_has_order(fc)) | |
395 | hdrlen += IEEE80211_HT_CTL_LEN; | |
396 | goto out; | |
397 | } | |
398 | ||
e31a16d6 ZY |
399 | if (ieee80211_is_ctl(fc)) { |
400 | /* | |
401 | * ACK and CTS are 10 bytes, all others 16. To see how | |
402 | * to get this condition consider | |
403 | * subtype mask: 0b0000000011110000 (0x00F0) | |
404 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
405 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
406 | * bits that matter: ^^^ (0x00E0) | |
407 | * value of those: 0b0000000011000000 (0x00C0) | |
408 | */ | |
409 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
410 | hdrlen = 10; | |
411 | else | |
412 | hdrlen = 16; | |
413 | } | |
414 | out: | |
415 | return hdrlen; | |
416 | } | |
417 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
418 | ||
419 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
420 | { | |
421 | const struct ieee80211_hdr *hdr = | |
422 | (const struct ieee80211_hdr *)skb->data; | |
423 | unsigned int hdrlen; | |
424 | ||
425 | if (unlikely(skb->len < 10)) | |
426 | return 0; | |
427 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
428 | if (unlikely(hdrlen > skb->len)) | |
429 | return 0; | |
430 | return hdrlen; | |
431 | } | |
432 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
433 | ||
2d1c304c | 434 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 435 | { |
2d1c304c | 436 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 437 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 438 | switch (ae) { |
7dd111e8 | 439 | default: |
e31a16d6 ZY |
440 | case 0: |
441 | return 6; | |
3c5772a5 | 442 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 443 | return 12; |
3c5772a5 | 444 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 445 | return 18; |
e31a16d6 ZY |
446 | } |
447 | } | |
2d1c304c FF |
448 | |
449 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
450 | { | |
451 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
452 | } | |
9b395bc3 | 453 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 454 | |
7f6990c8 | 455 | int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
24bba078 FF |
456 | const u8 *addr, enum nl80211_iftype iftype, |
457 | u8 data_offset) | |
e31a16d6 ZY |
458 | { |
459 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
460 | struct { |
461 | u8 hdr[ETH_ALEN] __aligned(2); | |
462 | __be16 proto; | |
463 | } payload; | |
464 | struct ethhdr tmp; | |
465 | u16 hdrlen; | |
466 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
467 | |
468 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
469 | return -1; | |
470 | ||
24bba078 | 471 | hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; |
2d1c304c FF |
472 | if (skb->len < hdrlen + 8) |
473 | return -1; | |
e31a16d6 ZY |
474 | |
475 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
476 | * header | |
477 | * IEEE 802.11 address fields: | |
478 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
479 | * 0 0 DA SA BSSID n/a | |
480 | * 0 1 DA BSSID SA n/a | |
481 | * 1 0 BSSID SA DA n/a | |
482 | * 1 1 RA TA DA SA | |
483 | */ | |
2d1c304c FF |
484 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
485 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
486 | ||
487 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
488 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 | 489 | |
5667c86a RM |
490 | mesh_flags &= MESH_FLAGS_AE; |
491 | ||
e31a16d6 ZY |
492 | switch (hdr->frame_control & |
493 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
494 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
495 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
496 | iftype != NL80211_IFTYPE_AP_VLAN && |
497 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
498 | return -1; |
499 | break; | |
500 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
501 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
502 | iftype != NL80211_IFTYPE_MESH_POINT && |
503 | iftype != NL80211_IFTYPE_AP_VLAN && | |
504 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
505 | return -1; |
506 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
5667c86a | 507 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f | 508 | return -1; |
5667c86a | 509 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
510 | skb_copy_bits(skb, hdrlen + |
511 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 512 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 513 | } |
2d1c304c | 514 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
515 | } |
516 | break; | |
517 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 518 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
519 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
520 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
521 | (is_multicast_ether_addr(tmp.h_dest) && |
522 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 523 | return -1; |
3c5772a5 | 524 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
5667c86a | 525 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 526 | return -1; |
5667c86a | 527 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
528 | skb_copy_bits(skb, hdrlen + |
529 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
530 | tmp.h_source, ETH_ALEN); |
531 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 532 | } |
e31a16d6 ZY |
533 | break; |
534 | case cpu_to_le16(0): | |
941c93cd | 535 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
536 | iftype != NL80211_IFTYPE_STATION && |
537 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 538 | return -1; |
e31a16d6 ZY |
539 | break; |
540 | } | |
541 | ||
2d1c304c FF |
542 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
543 | tmp.h_proto = payload.proto; | |
e31a16d6 | 544 | |
2d1c304c FF |
545 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
546 | tmp.h_proto != htons(ETH_P_AARP) && | |
547 | tmp.h_proto != htons(ETH_P_IPX)) || | |
548 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
549 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
550 | * replace EtherType */ | |
2d1c304c FF |
551 | hdrlen += ETH_ALEN + 2; |
552 | else | |
c041778c | 553 | tmp.h_proto = htons(skb->len - hdrlen); |
2d1c304c FF |
554 | |
555 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 556 | |
2d1c304c | 557 | if (!ehdr) |
d58ff351 | 558 | ehdr = skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
559 | memcpy(ehdr, &tmp, sizeof(tmp)); |
560 | ||
e31a16d6 ZY |
561 | return 0; |
562 | } | |
7f6990c8 | 563 | EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
e31a16d6 | 564 | |
2b67f944 FF |
565 | static void |
566 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
567 | void *ptr, int len, int size) | |
568 | { | |
569 | struct skb_shared_info *sh = skb_shinfo(skb); | |
570 | int page_offset; | |
571 | ||
81c044fc | 572 | get_page(page); |
2b67f944 FF |
573 | page_offset = ptr - page_address(page); |
574 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
575 | } | |
576 | ||
577 | static void | |
578 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
579 | int offset, int len) | |
580 | { | |
581 | struct skb_shared_info *sh = skb_shinfo(skb); | |
aa1702dd | 582 | const skb_frag_t *frag = &sh->frags[0]; |
2b67f944 FF |
583 | struct page *frag_page; |
584 | void *frag_ptr; | |
585 | int frag_len, frag_size; | |
586 | int head_size = skb->len - skb->data_len; | |
587 | int cur_len; | |
588 | ||
589 | frag_page = virt_to_head_page(skb->head); | |
590 | frag_ptr = skb->data; | |
591 | frag_size = head_size; | |
592 | ||
593 | while (offset >= frag_size) { | |
594 | offset -= frag_size; | |
2b67f944 FF |
595 | frag_page = skb_frag_page(frag); |
596 | frag_ptr = skb_frag_address(frag); | |
597 | frag_size = skb_frag_size(frag); | |
aa1702dd | 598 | frag++; |
2b67f944 FF |
599 | } |
600 | ||
601 | frag_ptr += offset; | |
602 | frag_len = frag_size - offset; | |
603 | ||
604 | cur_len = min(len, frag_len); | |
605 | ||
606 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
607 | len -= cur_len; | |
608 | ||
609 | while (len > 0) { | |
2b67f944 FF |
610 | frag_len = skb_frag_size(frag); |
611 | cur_len = min(len, frag_len); | |
612 | __frame_add_frag(frame, skb_frag_page(frag), | |
613 | skb_frag_address(frag), cur_len, frag_len); | |
614 | len -= cur_len; | |
aa1702dd | 615 | frag++; |
2b67f944 FF |
616 | } |
617 | } | |
618 | ||
230fd28a FF |
619 | static struct sk_buff * |
620 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 621 | int offset, int len, bool reuse_frag) |
230fd28a FF |
622 | { |
623 | struct sk_buff *frame; | |
2b67f944 | 624 | int cur_len = len; |
230fd28a FF |
625 | |
626 | if (skb->len - offset < len) | |
627 | return NULL; | |
628 | ||
2b67f944 FF |
629 | /* |
630 | * When reusing framents, copy some data to the head to simplify | |
631 | * ethernet header handling and speed up protocol header processing | |
632 | * in the stack later. | |
633 | */ | |
634 | if (reuse_frag) | |
635 | cur_len = min_t(int, len, 32); | |
636 | ||
230fd28a FF |
637 | /* |
638 | * Allocate and reserve two bytes more for payload | |
639 | * alignment since sizeof(struct ethhdr) is 14. | |
640 | */ | |
2b67f944 | 641 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
16a910a6 GG |
642 | if (!frame) |
643 | return NULL; | |
230fd28a FF |
644 | |
645 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
646 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
647 | ||
648 | len -= cur_len; | |
649 | if (!len) | |
650 | return frame; | |
651 | ||
652 | offset += cur_len; | |
653 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
654 | |
655 | return frame; | |
656 | } | |
eaf85ca7 ZY |
657 | |
658 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
659 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad | 660 | const unsigned int extra_headroom, |
8b935ee2 | 661 | const u8 *check_da, const u8 *check_sa) |
eaf85ca7 | 662 | { |
230fd28a | 663 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
664 | struct sk_buff *frame = NULL; |
665 | u16 ethertype; | |
666 | u8 *payload; | |
7f6990c8 | 667 | int offset = 0, remaining; |
230fd28a | 668 | struct ethhdr eth; |
2b67f944 | 669 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 670 | bool reuse_skb = false; |
230fd28a | 671 | bool last = false; |
88665f5a | 672 | |
230fd28a FF |
673 | while (!last) { |
674 | unsigned int subframe_len; | |
675 | int len; | |
eaf85ca7 | 676 | u8 padding; |
eaf85ca7 | 677 | |
230fd28a FF |
678 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
679 | len = ntohs(eth.h_proto); | |
680 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 681 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 682 | |
eaf85ca7 | 683 | /* the last MSDU has no padding */ |
230fd28a | 684 | remaining = skb->len - offset; |
eaf85ca7 ZY |
685 | if (subframe_len > remaining) |
686 | goto purge; | |
687 | ||
230fd28a | 688 | offset += sizeof(struct ethhdr); |
230fd28a | 689 | last = remaining <= subframe_len + padding; |
8b935ee2 JB |
690 | |
691 | /* FIXME: should we really accept multicast DA? */ | |
692 | if ((check_da && !is_multicast_ether_addr(eth.h_dest) && | |
693 | !ether_addr_equal(check_da, eth.h_dest)) || | |
694 | (check_sa && !ether_addr_equal(check_sa, eth.h_source))) { | |
695 | offset += len + padding; | |
696 | continue; | |
697 | } | |
698 | ||
699 | /* reuse skb for the last subframe */ | |
2b67f944 | 700 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 701 | skb_pull(skb, offset); |
eaf85ca7 | 702 | frame = skb; |
230fd28a FF |
703 | reuse_skb = true; |
704 | } else { | |
2b67f944 FF |
705 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
706 | reuse_frag); | |
eaf85ca7 ZY |
707 | if (!frame) |
708 | goto purge; | |
709 | ||
230fd28a | 710 | offset += len + padding; |
eaf85ca7 ZY |
711 | } |
712 | ||
713 | skb_reset_network_header(frame); | |
714 | frame->dev = skb->dev; | |
715 | frame->priority = skb->priority; | |
716 | ||
717 | payload = frame->data; | |
718 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 719 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 720 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 721 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
722 | eth.h_proto = htons(ethertype); |
723 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 724 | } |
230fd28a FF |
725 | |
726 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
727 | __skb_queue_tail(list, frame); |
728 | } | |
729 | ||
230fd28a FF |
730 | if (!reuse_skb) |
731 | dev_kfree_skb(skb); | |
732 | ||
eaf85ca7 ZY |
733 | return; |
734 | ||
735 | purge: | |
736 | __skb_queue_purge(list); | |
eaf85ca7 ZY |
737 | dev_kfree_skb(skb); |
738 | } | |
739 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
740 | ||
e31a16d6 | 741 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
742 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
743 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
744 | { |
745 | unsigned int dscp; | |
c6ca5e28 | 746 | unsigned char vlan_priority; |
1fc9b725 | 747 | unsigned int ret; |
e31a16d6 ZY |
748 | |
749 | /* skb->priority values from 256->263 are magic values to | |
750 | * directly indicate a specific 802.1d priority. This is used | |
751 | * to allow 802.1d priority to be passed directly in from VLAN | |
752 | * tags, etc. | |
753 | */ | |
1fc9b725 JB |
754 | if (skb->priority >= 256 && skb->priority <= 263) { |
755 | ret = skb->priority - 256; | |
756 | goto out; | |
757 | } | |
e31a16d6 | 758 | |
df8a39de JP |
759 | if (skb_vlan_tag_present(skb)) { |
760 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 | 761 | >> VLAN_PRIO_SHIFT; |
1fc9b725 JB |
762 | if (vlan_priority > 0) { |
763 | ret = vlan_priority; | |
764 | goto out; | |
765 | } | |
c6ca5e28 V |
766 | } |
767 | ||
e31a16d6 ZY |
768 | switch (skb->protocol) { |
769 | case htons(ETH_P_IP): | |
b156579b DT |
770 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
771 | break; | |
772 | case htons(ETH_P_IPV6): | |
773 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 774 | break; |
960d97f9 SW |
775 | case htons(ETH_P_MPLS_UC): |
776 | case htons(ETH_P_MPLS_MC): { | |
777 | struct mpls_label mpls_tmp, *mpls; | |
778 | ||
779 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
780 | sizeof(*mpls), &mpls_tmp); | |
781 | if (!mpls) | |
782 | return 0; | |
783 | ||
1fc9b725 | 784 | ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) |
960d97f9 | 785 | >> MPLS_LS_TC_SHIFT; |
1fc9b725 | 786 | goto out; |
960d97f9 SW |
787 | } |
788 | case htons(ETH_P_80221): | |
789 | /* 802.21 is always network control traffic */ | |
790 | return 7; | |
e31a16d6 ZY |
791 | default: |
792 | return 0; | |
793 | } | |
794 | ||
fa9ffc74 KP |
795 | if (qos_map) { |
796 | unsigned int i, tmp_dscp = dscp >> 2; | |
797 | ||
798 | for (i = 0; i < qos_map->num_des; i++) { | |
1fc9b725 JB |
799 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) { |
800 | ret = qos_map->dscp_exception[i].up; | |
801 | goto out; | |
802 | } | |
fa9ffc74 KP |
803 | } |
804 | ||
805 | for (i = 0; i < 8; i++) { | |
806 | if (tmp_dscp >= qos_map->up[i].low && | |
1fc9b725 JB |
807 | tmp_dscp <= qos_map->up[i].high) { |
808 | ret = i; | |
809 | goto out; | |
810 | } | |
fa9ffc74 KP |
811 | } |
812 | } | |
813 | ||
1fc9b725 JB |
814 | ret = dscp >> 5; |
815 | out: | |
816 | return array_index_nospec(ret, IEEE80211_NUM_TIDS); | |
e31a16d6 ZY |
817 | } |
818 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 | 819 | |
49a68e0d | 820 | const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) |
517357c6 | 821 | { |
9caf0364 JB |
822 | const struct cfg80211_bss_ies *ies; |
823 | ||
824 | ies = rcu_dereference(bss->ies); | |
825 | if (!ies) | |
517357c6 | 826 | return NULL; |
9caf0364 | 827 | |
49a68e0d | 828 | return cfg80211_find_elem(id, ies->data, ies->len); |
517357c6 | 829 | } |
49a68e0d | 830 | EXPORT_SYMBOL(ieee80211_bss_get_elem); |
fffd0934 JB |
831 | |
832 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
833 | { | |
f26cbf40 | 834 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
835 | struct net_device *dev = wdev->netdev; |
836 | int i; | |
837 | ||
838 | if (!wdev->connect_keys) | |
839 | return; | |
840 | ||
b8676221 | 841 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
fffd0934 JB |
842 | if (!wdev->connect_keys->params[i].cipher) |
843 | continue; | |
e35e4d28 HG |
844 | if (rdev_add_key(rdev, dev, i, false, NULL, |
845 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 846 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
847 | continue; |
848 | } | |
d4f29978 JB |
849 | if (wdev->connect_keys->def == i && |
850 | rdev_set_default_key(rdev, dev, i, true, true)) { | |
851 | netdev_err(dev, "failed to set defkey %d\n", i); | |
852 | continue; | |
853 | } | |
fffd0934 JB |
854 | } |
855 | ||
b47f610b | 856 | kzfree(wdev->connect_keys); |
fffd0934 JB |
857 | wdev->connect_keys = NULL; |
858 | } | |
3d54d255 | 859 | |
1f6fc43e | 860 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
861 | { |
862 | struct cfg80211_event *ev; | |
863 | unsigned long flags; | |
3d54d255 JB |
864 | |
865 | spin_lock_irqsave(&wdev->event_lock, flags); | |
866 | while (!list_empty(&wdev->event_list)) { | |
867 | ev = list_first_entry(&wdev->event_list, | |
868 | struct cfg80211_event, list); | |
869 | list_del(&ev->list); | |
870 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
871 | ||
872 | wdev_lock(wdev); | |
873 | switch (ev->type) { | |
874 | case EVENT_CONNECT_RESULT: | |
3d54d255 | 875 | __cfg80211_connect_result( |
5349a0f7 VK |
876 | wdev->netdev, |
877 | &ev->cr, | |
878 | ev->cr.status == WLAN_STATUS_SUCCESS); | |
3d54d255 JB |
879 | break; |
880 | case EVENT_ROAMED: | |
29ce6ecb | 881 | __cfg80211_roamed(wdev, &ev->rm); |
3d54d255 JB |
882 | break; |
883 | case EVENT_DISCONNECTED: | |
884 | __cfg80211_disconnected(wdev->netdev, | |
885 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
886 | ev->dc.reason, |
887 | !ev->dc.locally_generated); | |
3d54d255 JB |
888 | break; |
889 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
890 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
891 | ev->ij.channel); | |
3d54d255 | 892 | break; |
f04c2203 MK |
893 | case EVENT_STOPPED: |
894 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
895 | break; | |
503c1fb9 AS |
896 | case EVENT_PORT_AUTHORIZED: |
897 | __cfg80211_port_authorized(wdev, ev->pa.bssid); | |
898 | break; | |
3d54d255 JB |
899 | } |
900 | wdev_unlock(wdev); | |
901 | ||
902 | kfree(ev); | |
903 | ||
904 | spin_lock_irqsave(&wdev->event_lock, flags); | |
905 | } | |
906 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
907 | } | |
908 | ||
909 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
910 | { | |
911 | struct wireless_dev *wdev; | |
912 | ||
913 | ASSERT_RTNL(); | |
3d54d255 | 914 | |
53873f13 | 915 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 916 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
917 | } |
918 | ||
919 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
920 | struct net_device *dev, enum nl80211_iftype ntype, | |
818a986e | 921 | struct vif_params *params) |
3d54d255 JB |
922 | { |
923 | int err; | |
924 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
925 | ||
73fb08e2 | 926 | ASSERT_RTNL(); |
3d54d255 JB |
927 | |
928 | /* don't support changing VLANs, you just re-create them */ | |
929 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
930 | return -EOPNOTSUPP; | |
931 | ||
cb3b7d87 AB |
932 | /* cannot change into P2P device or NAN */ |
933 | if (ntype == NL80211_IFTYPE_P2P_DEVICE || | |
934 | ntype == NL80211_IFTYPE_NAN) | |
98104fde JB |
935 | return -EOPNOTSUPP; |
936 | ||
3d54d255 JB |
937 | if (!rdev->ops->change_virtual_intf || |
938 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
939 | return -EOPNOTSUPP; | |
940 | ||
ad4bb6f8 | 941 | /* if it's part of a bridge, reject changing type to station/ibss */ |
2e92a2d0 | 942 | if (netif_is_bridge_port(dev) && |
074ac8df JB |
943 | (ntype == NL80211_IFTYPE_ADHOC || |
944 | ntype == NL80211_IFTYPE_STATION || | |
945 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
946 | return -EBUSY; |
947 | ||
6cbfb1bb | 948 | if (ntype != otype) { |
9bc383de | 949 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 950 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 951 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 952 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 953 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 954 | |
3d54d255 | 955 | switch (otype) { |
ac800140 | 956 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 957 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 958 | break; |
3d54d255 JB |
959 | case NL80211_IFTYPE_ADHOC: |
960 | cfg80211_leave_ibss(rdev, dev, false); | |
961 | break; | |
962 | case NL80211_IFTYPE_STATION: | |
074ac8df | 963 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 964 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
965 | cfg80211_disconnect(rdev, dev, |
966 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 967 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
968 | break; |
969 | case NL80211_IFTYPE_MESH_POINT: | |
970 | /* mesh should be handled? */ | |
971 | break; | |
972 | default: | |
973 | break; | |
974 | } | |
975 | ||
976 | cfg80211_process_rdev_events(rdev); | |
c1d3ad84 | 977 | cfg80211_mlme_purge_registrations(dev->ieee80211_ptr); |
3d54d255 JB |
978 | } |
979 | ||
818a986e | 980 | err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
3d54d255 JB |
981 | |
982 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
983 | ||
9bc383de JB |
984 | if (!err && params && params->use_4addr != -1) |
985 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
986 | ||
ad4bb6f8 JB |
987 | if (!err) { |
988 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
989 | switch (ntype) { | |
990 | case NL80211_IFTYPE_STATION: | |
991 | if (dev->ieee80211_ptr->use_4addr) | |
992 | break; | |
993 | /* fall through */ | |
6e0bd6c3 | 994 | case NL80211_IFTYPE_OCB: |
074ac8df | 995 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
996 | case NL80211_IFTYPE_ADHOC: |
997 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
998 | break; | |
074ac8df | 999 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
1000 | case NL80211_IFTYPE_AP: |
1001 | case NL80211_IFTYPE_AP_VLAN: | |
1002 | case NL80211_IFTYPE_WDS: | |
1003 | case NL80211_IFTYPE_MESH_POINT: | |
1004 | /* bridging OK */ | |
1005 | break; | |
1006 | case NL80211_IFTYPE_MONITOR: | |
1007 | /* monitor can't bridge anyway */ | |
1008 | break; | |
1009 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1010 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
1011 | /* not happening */ |
1012 | break; | |
98104fde | 1013 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1014 | case NL80211_IFTYPE_NAN: |
98104fde JB |
1015 | WARN_ON(1); |
1016 | break; | |
ad4bb6f8 JB |
1017 | } |
1018 | } | |
1019 | ||
dbbae26a MK |
1020 | if (!err && ntype != otype && netif_running(dev)) { |
1021 | cfg80211_update_iface_num(rdev, ntype, 1); | |
1022 | cfg80211_update_iface_num(rdev, otype, -1); | |
1023 | } | |
1024 | ||
3d54d255 JB |
1025 | return err; |
1026 | } | |
254416aa | 1027 | |
0c1eca4e JB |
1028 | static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
1029 | { | |
1030 | int modulation, streams, bitrate; | |
1031 | ||
1032 | /* the formula below does only work for MCS values smaller than 32 */ | |
1033 | if (WARN_ON_ONCE(rate->mcs >= 32)) | |
1034 | return 0; | |
1035 | ||
1036 | modulation = rate->mcs & 7; | |
1037 | streams = (rate->mcs >> 3) + 1; | |
1038 | ||
1039 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; | |
1040 | ||
1041 | if (modulation < 4) | |
1042 | bitrate *= (modulation + 1); | |
1043 | else if (modulation == 4) | |
1044 | bitrate *= (modulation + 2); | |
1045 | else | |
1046 | bitrate *= (modulation + 3); | |
1047 | ||
1048 | bitrate *= streams; | |
1049 | ||
1050 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1051 | bitrate = (bitrate / 9) * 10; | |
1052 | ||
1053 | /* do NOT round down here */ | |
1054 | return (bitrate + 50000) / 100000; | |
1055 | } | |
1056 | ||
2a38075c | 1057 | static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate) |
95ddc1fc VK |
1058 | { |
1059 | static const u32 __mcs2bitrate[] = { | |
1060 | /* control PHY */ | |
1061 | [0] = 275, | |
1062 | /* SC PHY */ | |
1063 | [1] = 3850, | |
1064 | [2] = 7700, | |
1065 | [3] = 9625, | |
1066 | [4] = 11550, | |
1067 | [5] = 12512, /* 1251.25 mbps */ | |
1068 | [6] = 15400, | |
1069 | [7] = 19250, | |
1070 | [8] = 23100, | |
1071 | [9] = 25025, | |
1072 | [10] = 30800, | |
1073 | [11] = 38500, | |
1074 | [12] = 46200, | |
1075 | /* OFDM PHY */ | |
1076 | [13] = 6930, | |
1077 | [14] = 8662, /* 866.25 mbps */ | |
1078 | [15] = 13860, | |
1079 | [16] = 17325, | |
1080 | [17] = 20790, | |
1081 | [18] = 27720, | |
1082 | [19] = 34650, | |
1083 | [20] = 41580, | |
1084 | [21] = 45045, | |
1085 | [22] = 51975, | |
1086 | [23] = 62370, | |
1087 | [24] = 67568, /* 6756.75 mbps */ | |
1088 | /* LP-SC PHY */ | |
1089 | [25] = 6260, | |
1090 | [26] = 8340, | |
1091 | [27] = 11120, | |
1092 | [28] = 12510, | |
1093 | [29] = 16680, | |
1094 | [30] = 22240, | |
1095 | [31] = 25030, | |
1096 | }; | |
1097 | ||
1098 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1099 | return 0; | |
1100 | ||
1101 | return __mcs2bitrate[rate->mcs]; | |
1102 | } | |
1103 | ||
2a38075c AAL |
1104 | static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate) |
1105 | { | |
1106 | static const u32 __mcs2bitrate[] = { | |
1107 | /* control PHY */ | |
1108 | [0] = 275, | |
1109 | /* SC PHY */ | |
1110 | [1] = 3850, | |
1111 | [2] = 7700, | |
1112 | [3] = 9625, | |
1113 | [4] = 11550, | |
1114 | [5] = 12512, /* 1251.25 mbps */ | |
1115 | [6] = 13475, | |
1116 | [7] = 15400, | |
1117 | [8] = 19250, | |
1118 | [9] = 23100, | |
1119 | [10] = 25025, | |
1120 | [11] = 26950, | |
1121 | [12] = 30800, | |
1122 | [13] = 38500, | |
1123 | [14] = 46200, | |
1124 | [15] = 50050, | |
1125 | [16] = 53900, | |
1126 | [17] = 57750, | |
1127 | [18] = 69300, | |
1128 | [19] = 75075, | |
1129 | [20] = 80850, | |
1130 | }; | |
1131 | ||
1132 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1133 | return 0; | |
1134 | ||
1135 | return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch; | |
1136 | } | |
1137 | ||
db9c64cf JB |
1138 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1139 | { | |
1140 | static const u32 base[4][10] = { | |
1141 | { 6500000, | |
1142 | 13000000, | |
1143 | 19500000, | |
1144 | 26000000, | |
1145 | 39000000, | |
1146 | 52000000, | |
1147 | 58500000, | |
1148 | 65000000, | |
1149 | 78000000, | |
8fdd136f PT |
1150 | /* not in the spec, but some devices use this: */ |
1151 | 86500000, | |
db9c64cf JB |
1152 | }, |
1153 | { 13500000, | |
1154 | 27000000, | |
1155 | 40500000, | |
1156 | 54000000, | |
1157 | 81000000, | |
1158 | 108000000, | |
1159 | 121500000, | |
1160 | 135000000, | |
1161 | 162000000, | |
1162 | 180000000, | |
1163 | }, | |
1164 | { 29300000, | |
1165 | 58500000, | |
1166 | 87800000, | |
1167 | 117000000, | |
1168 | 175500000, | |
1169 | 234000000, | |
1170 | 263300000, | |
1171 | 292500000, | |
1172 | 351000000, | |
1173 | 390000000, | |
1174 | }, | |
1175 | { 58500000, | |
1176 | 117000000, | |
1177 | 175500000, | |
1178 | 234000000, | |
1179 | 351000000, | |
1180 | 468000000, | |
1181 | 526500000, | |
1182 | 585000000, | |
1183 | 702000000, | |
1184 | 780000000, | |
1185 | }, | |
1186 | }; | |
1187 | u32 bitrate; | |
1188 | int idx; | |
1189 | ||
ca8fe250 JB |
1190 | if (rate->mcs > 9) |
1191 | goto warn; | |
db9c64cf | 1192 | |
b51f3bee JB |
1193 | switch (rate->bw) { |
1194 | case RATE_INFO_BW_160: | |
1195 | idx = 3; | |
1196 | break; | |
1197 | case RATE_INFO_BW_80: | |
1198 | idx = 2; | |
1199 | break; | |
1200 | case RATE_INFO_BW_40: | |
1201 | idx = 1; | |
1202 | break; | |
1203 | case RATE_INFO_BW_5: | |
1204 | case RATE_INFO_BW_10: | |
1205 | default: | |
ca8fe250 | 1206 | goto warn; |
b51f3bee JB |
1207 | case RATE_INFO_BW_20: |
1208 | idx = 0; | |
1209 | } | |
db9c64cf JB |
1210 | |
1211 | bitrate = base[idx][rate->mcs]; | |
1212 | bitrate *= rate->nss; | |
1213 | ||
1214 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1215 | bitrate = (bitrate / 9) * 10; | |
1216 | ||
1217 | /* do NOT round down here */ | |
1218 | return (bitrate + 50000) / 100000; | |
ca8fe250 JB |
1219 | warn: |
1220 | WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", | |
1221 | rate->bw, rate->mcs, rate->nss); | |
1222 | return 0; | |
db9c64cf JB |
1223 | } |
1224 | ||
c4cbaf79 LC |
1225 | static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) |
1226 | { | |
1227 | #define SCALE 2048 | |
1228 | u16 mcs_divisors[12] = { | |
1229 | 34133, /* 16.666666... */ | |
1230 | 17067, /* 8.333333... */ | |
1231 | 11378, /* 5.555555... */ | |
1232 | 8533, /* 4.166666... */ | |
1233 | 5689, /* 2.777777... */ | |
1234 | 4267, /* 2.083333... */ | |
1235 | 3923, /* 1.851851... */ | |
1236 | 3413, /* 1.666666... */ | |
1237 | 2844, /* 1.388888... */ | |
1238 | 2560, /* 1.250000... */ | |
1239 | 2276, /* 1.111111... */ | |
1240 | 2048, /* 1.000000... */ | |
1241 | }; | |
1242 | u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; | |
1243 | u32 rates_969[3] = { 480388888, 453700000, 408333333 }; | |
1244 | u32 rates_484[3] = { 229411111, 216666666, 195000000 }; | |
1245 | u32 rates_242[3] = { 114711111, 108333333, 97500000 }; | |
1246 | u32 rates_106[3] = { 40000000, 37777777, 34000000 }; | |
1247 | u32 rates_52[3] = { 18820000, 17777777, 16000000 }; | |
1248 | u32 rates_26[3] = { 9411111, 8888888, 8000000 }; | |
1249 | u64 tmp; | |
1250 | u32 result; | |
1251 | ||
1252 | if (WARN_ON_ONCE(rate->mcs > 11)) | |
1253 | return 0; | |
1254 | ||
1255 | if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) | |
1256 | return 0; | |
1257 | if (WARN_ON_ONCE(rate->he_ru_alloc > | |
1258 | NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) | |
1259 | return 0; | |
1260 | if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) | |
1261 | return 0; | |
1262 | ||
1263 | if (rate->bw == RATE_INFO_BW_160) | |
1264 | result = rates_160M[rate->he_gi]; | |
1265 | else if (rate->bw == RATE_INFO_BW_80 || | |
1266 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1267 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) | |
1268 | result = rates_969[rate->he_gi]; | |
1269 | else if (rate->bw == RATE_INFO_BW_40 || | |
1270 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1271 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) | |
1272 | result = rates_484[rate->he_gi]; | |
1273 | else if (rate->bw == RATE_INFO_BW_20 || | |
1274 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1275 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) | |
1276 | result = rates_242[rate->he_gi]; | |
1277 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1278 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) | |
1279 | result = rates_106[rate->he_gi]; | |
1280 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1281 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) | |
1282 | result = rates_52[rate->he_gi]; | |
1283 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1284 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) | |
1285 | result = rates_26[rate->he_gi]; | |
344c9719 NC |
1286 | else { |
1287 | WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", | |
1288 | rate->bw, rate->he_ru_alloc); | |
c4cbaf79 | 1289 | return 0; |
344c9719 | 1290 | } |
c4cbaf79 LC |
1291 | |
1292 | /* now scale to the appropriate MCS */ | |
1293 | tmp = result; | |
1294 | tmp *= SCALE; | |
1295 | do_div(tmp, mcs_divisors[rate->mcs]); | |
1296 | result = tmp; | |
1297 | ||
1298 | /* and take NSS, DCM into account */ | |
1299 | result = (result * rate->nss) / 8; | |
1300 | if (rate->he_dcm) | |
1301 | result /= 2; | |
1302 | ||
25d16d12 | 1303 | return result / 10000; |
c4cbaf79 LC |
1304 | } |
1305 | ||
8eb41c8d | 1306 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa | 1307 | { |
0c1eca4e JB |
1308 | if (rate->flags & RATE_INFO_FLAGS_MCS) |
1309 | return cfg80211_calculate_bitrate_ht(rate); | |
2a38075c AAL |
1310 | if (rate->flags & RATE_INFO_FLAGS_DMG) |
1311 | return cfg80211_calculate_bitrate_dmg(rate); | |
1312 | if (rate->flags & RATE_INFO_FLAGS_EDMG) | |
1313 | return cfg80211_calculate_bitrate_edmg(rate); | |
db9c64cf JB |
1314 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1315 | return cfg80211_calculate_bitrate_vht(rate); | |
c4cbaf79 LC |
1316 | if (rate->flags & RATE_INFO_FLAGS_HE_MCS) |
1317 | return cfg80211_calculate_bitrate_he(rate); | |
254416aa | 1318 | |
0c1eca4e | 1319 | return rate->legacy; |
254416aa | 1320 | } |
8097e149 | 1321 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1322 | |
c216e641 AS |
1323 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1324 | enum ieee80211_p2p_attr_id attr, | |
1325 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1326 | { |
1327 | u8 *out = buf; | |
1328 | u16 attr_remaining = 0; | |
1329 | bool desired_attr = false; | |
1330 | u16 desired_len = 0; | |
1331 | ||
1332 | while (len > 0) { | |
1333 | unsigned int iedatalen; | |
1334 | unsigned int copy; | |
1335 | const u8 *iedata; | |
1336 | ||
1337 | if (len < 2) | |
1338 | return -EILSEQ; | |
1339 | iedatalen = ies[1]; | |
1340 | if (iedatalen + 2 > len) | |
1341 | return -EILSEQ; | |
1342 | ||
1343 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1344 | goto cont; | |
1345 | ||
1346 | if (iedatalen < 4) | |
1347 | goto cont; | |
1348 | ||
1349 | iedata = ies + 2; | |
1350 | ||
1351 | /* check WFA OUI, P2P subtype */ | |
1352 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1353 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1354 | goto cont; | |
1355 | ||
1356 | iedatalen -= 4; | |
1357 | iedata += 4; | |
1358 | ||
1359 | /* check attribute continuation into this IE */ | |
1360 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1361 | if (copy && desired_attr) { | |
1362 | desired_len += copy; | |
1363 | if (out) { | |
1364 | memcpy(out, iedata, min(bufsize, copy)); | |
1365 | out += min(bufsize, copy); | |
1366 | bufsize -= min(bufsize, copy); | |
1367 | } | |
1368 | ||
1369 | ||
1370 | if (copy == attr_remaining) | |
1371 | return desired_len; | |
1372 | } | |
1373 | ||
1374 | attr_remaining -= copy; | |
1375 | if (attr_remaining) | |
1376 | goto cont; | |
1377 | ||
1378 | iedatalen -= copy; | |
1379 | iedata += copy; | |
1380 | ||
1381 | while (iedatalen > 0) { | |
1382 | u16 attr_len; | |
1383 | ||
1384 | /* P2P attribute ID & size must fit */ | |
1385 | if (iedatalen < 3) | |
1386 | return -EILSEQ; | |
1387 | desired_attr = iedata[0] == attr; | |
1388 | attr_len = get_unaligned_le16(iedata + 1); | |
1389 | iedatalen -= 3; | |
1390 | iedata += 3; | |
1391 | ||
1392 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1393 | ||
1394 | if (desired_attr) { | |
1395 | desired_len += copy; | |
1396 | if (out) { | |
1397 | memcpy(out, iedata, min(bufsize, copy)); | |
1398 | out += min(bufsize, copy); | |
1399 | bufsize -= min(bufsize, copy); | |
1400 | } | |
1401 | ||
1402 | if (copy == attr_len) | |
1403 | return desired_len; | |
1404 | } | |
1405 | ||
1406 | iedata += copy; | |
1407 | iedatalen -= copy; | |
1408 | attr_remaining = attr_len - copy; | |
1409 | } | |
1410 | ||
1411 | cont: | |
1412 | len -= ies[1] + 2; | |
1413 | ies += ies[1] + 2; | |
1414 | } | |
1415 | ||
1416 | if (attr_remaining && desired_attr) | |
1417 | return -EILSEQ; | |
1418 | ||
1419 | return -ENOENT; | |
1420 | } | |
1421 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1422 | ||
2512b1b1 | 1423 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) |
29464ccc JB |
1424 | { |
1425 | int i; | |
1426 | ||
2512b1b1 LK |
1427 | /* Make sure array values are legal */ |
1428 | if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) | |
1429 | return false; | |
1430 | ||
1431 | i = 0; | |
1432 | while (i < n_ids) { | |
1433 | if (ids[i] == WLAN_EID_EXTENSION) { | |
1434 | if (id_ext && (ids[i + 1] == id)) | |
1435 | return true; | |
1436 | ||
1437 | i += 2; | |
1438 | continue; | |
1439 | } | |
1440 | ||
1441 | if (ids[i] == id && !id_ext) | |
29464ccc | 1442 | return true; |
2512b1b1 LK |
1443 | |
1444 | i++; | |
1445 | } | |
29464ccc JB |
1446 | return false; |
1447 | } | |
1448 | ||
8ac63448 JB |
1449 | static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
1450 | { | |
1451 | /* we assume a validly formed IEs buffer */ | |
1452 | u8 len = ies[pos + 1]; | |
1453 | ||
1454 | pos += 2 + len; | |
1455 | ||
1456 | /* the IE itself must have 255 bytes for fragments to follow */ | |
1457 | if (len < 255) | |
1458 | return pos; | |
1459 | ||
1460 | while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { | |
1461 | len = ies[pos + 1]; | |
1462 | pos += 2 + len; | |
1463 | } | |
1464 | ||
1465 | return pos; | |
1466 | } | |
1467 | ||
29464ccc JB |
1468 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
1469 | const u8 *ids, int n_ids, | |
1470 | const u8 *after_ric, int n_after_ric, | |
1471 | size_t offset) | |
1472 | { | |
1473 | size_t pos = offset; | |
1474 | ||
2512b1b1 LK |
1475 | while (pos < ielen) { |
1476 | u8 ext = 0; | |
1477 | ||
1478 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1479 | ext = 2; | |
1480 | if ((pos + ext) >= ielen) | |
1481 | break; | |
1482 | ||
1483 | if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], | |
1484 | ies[pos] == WLAN_EID_EXTENSION)) | |
1485 | break; | |
1486 | ||
29464ccc | 1487 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { |
8ac63448 | 1488 | pos = skip_ie(ies, ielen, pos); |
29464ccc | 1489 | |
2512b1b1 LK |
1490 | while (pos < ielen) { |
1491 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1492 | ext = 2; | |
1493 | else | |
1494 | ext = 0; | |
1495 | ||
1496 | if ((pos + ext) >= ielen) | |
1497 | break; | |
1498 | ||
1499 | if (!ieee80211_id_in_list(after_ric, | |
1500 | n_after_ric, | |
1501 | ies[pos + ext], | |
1502 | ext == 2)) | |
1503 | pos = skip_ie(ies, ielen, pos); | |
312ca38d JM |
1504 | else |
1505 | break; | |
2512b1b1 | 1506 | } |
29464ccc | 1507 | } else { |
8ac63448 | 1508 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1509 | } |
1510 | } | |
1511 | ||
1512 | return pos; | |
1513 | } | |
1514 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1515 | ||
1ce3e82b | 1516 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1517 | enum nl80211_band *band) |
1ce3e82b JB |
1518 | { |
1519 | switch (operating_class) { | |
1520 | case 112: | |
1521 | case 115 ... 127: | |
954a86ef | 1522 | case 128 ... 130: |
57fbcce3 | 1523 | *band = NL80211_BAND_5GHZ; |
1ce3e82b | 1524 | return true; |
852f0462 AS |
1525 | case 131 ... 135: |
1526 | *band = NL80211_BAND_6GHZ; | |
1527 | return true; | |
1ce3e82b JB |
1528 | case 81: |
1529 | case 82: | |
1530 | case 83: | |
1531 | case 84: | |
57fbcce3 | 1532 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1533 | return true; |
55300a13 | 1534 | case 180: |
57fbcce3 | 1535 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1536 | return true; |
1ce3e82b JB |
1537 | } |
1538 | ||
1539 | return false; | |
1540 | } | |
1541 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1542 | ||
a38700dd AN |
1543 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1544 | u8 *op_class) | |
1545 | { | |
1546 | u8 vht_opclass; | |
8442938c | 1547 | u32 freq = chandef->center_freq1; |
a38700dd AN |
1548 | |
1549 | if (freq >= 2412 && freq <= 2472) { | |
1550 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1551 | return false; | |
1552 | ||
1553 | /* 2.407 GHz, channels 1..13 */ | |
1554 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1555 | if (freq > chandef->chan->center_freq) | |
1556 | *op_class = 83; /* HT40+ */ | |
1557 | else | |
1558 | *op_class = 84; /* HT40- */ | |
1559 | } else { | |
1560 | *op_class = 81; | |
1561 | } | |
1562 | ||
1563 | return true; | |
1564 | } | |
1565 | ||
1566 | if (freq == 2484) { | |
ec649fed MH |
1567 | /* channel 14 is only for IEEE 802.11b */ |
1568 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) | |
a38700dd AN |
1569 | return false; |
1570 | ||
1571 | *op_class = 82; /* channel 14 */ | |
1572 | return true; | |
1573 | } | |
1574 | ||
1575 | switch (chandef->width) { | |
1576 | case NL80211_CHAN_WIDTH_80: | |
1577 | vht_opclass = 128; | |
1578 | break; | |
1579 | case NL80211_CHAN_WIDTH_160: | |
1580 | vht_opclass = 129; | |
1581 | break; | |
1582 | case NL80211_CHAN_WIDTH_80P80: | |
1583 | vht_opclass = 130; | |
1584 | break; | |
1585 | case NL80211_CHAN_WIDTH_10: | |
1586 | case NL80211_CHAN_WIDTH_5: | |
1587 | return false; /* unsupported for now */ | |
1588 | default: | |
1589 | vht_opclass = 0; | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | /* 5 GHz, channels 36..48 */ | |
1594 | if (freq >= 5180 && freq <= 5240) { | |
1595 | if (vht_opclass) { | |
1596 | *op_class = vht_opclass; | |
1597 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1598 | if (freq > chandef->chan->center_freq) | |
1599 | *op_class = 116; | |
1600 | else | |
1601 | *op_class = 117; | |
1602 | } else { | |
1603 | *op_class = 115; | |
1604 | } | |
1605 | ||
1606 | return true; | |
1607 | } | |
1608 | ||
1609 | /* 5 GHz, channels 52..64 */ | |
1610 | if (freq >= 5260 && freq <= 5320) { | |
1611 | if (vht_opclass) { | |
1612 | *op_class = vht_opclass; | |
1613 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1614 | if (freq > chandef->chan->center_freq) | |
1615 | *op_class = 119; | |
1616 | else | |
1617 | *op_class = 120; | |
1618 | } else { | |
1619 | *op_class = 118; | |
1620 | } | |
1621 | ||
1622 | return true; | |
1623 | } | |
1624 | ||
1625 | /* 5 GHz, channels 100..144 */ | |
1626 | if (freq >= 5500 && freq <= 5720) { | |
1627 | if (vht_opclass) { | |
1628 | *op_class = vht_opclass; | |
1629 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1630 | if (freq > chandef->chan->center_freq) | |
1631 | *op_class = 122; | |
1632 | else | |
1633 | *op_class = 123; | |
1634 | } else { | |
1635 | *op_class = 121; | |
1636 | } | |
1637 | ||
1638 | return true; | |
1639 | } | |
1640 | ||
1641 | /* 5 GHz, channels 149..169 */ | |
1642 | if (freq >= 5745 && freq <= 5845) { | |
1643 | if (vht_opclass) { | |
1644 | *op_class = vht_opclass; | |
1645 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1646 | if (freq > chandef->chan->center_freq) | |
1647 | *op_class = 126; | |
1648 | else | |
1649 | *op_class = 127; | |
1650 | } else if (freq <= 5805) { | |
1651 | *op_class = 124; | |
1652 | } else { | |
1653 | *op_class = 125; | |
1654 | } | |
1655 | ||
1656 | return true; | |
1657 | } | |
1658 | ||
1659 | /* 56.16 GHz, channel 1..4 */ | |
9cf0a0b4 | 1660 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { |
a38700dd AN |
1661 | if (chandef->width >= NL80211_CHAN_WIDTH_40) |
1662 | return false; | |
1663 | ||
1664 | *op_class = 180; | |
1665 | return true; | |
1666 | } | |
1667 | ||
1668 | /* not supported yet */ | |
1669 | return false; | |
1670 | } | |
1671 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1672 | ||
4c8dea63 JB |
1673 | static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
1674 | u32 *beacon_int_gcd, | |
1675 | bool *beacon_int_different) | |
56d1893d JB |
1676 | { |
1677 | struct wireless_dev *wdev; | |
56d1893d | 1678 | |
4c8dea63 JB |
1679 | *beacon_int_gcd = 0; |
1680 | *beacon_int_different = false; | |
56d1893d | 1681 | |
4c8dea63 | 1682 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
56d1893d JB |
1683 | if (!wdev->beacon_interval) |
1684 | continue; | |
0c317a02 | 1685 | |
4c8dea63 JB |
1686 | if (!*beacon_int_gcd) { |
1687 | *beacon_int_gcd = wdev->beacon_interval; | |
0c317a02 | 1688 | continue; |
4c8dea63 | 1689 | } |
0c317a02 | 1690 | |
4c8dea63 | 1691 | if (wdev->beacon_interval == *beacon_int_gcd) |
0c317a02 PK |
1692 | continue; |
1693 | ||
4c8dea63 JB |
1694 | *beacon_int_different = true; |
1695 | *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); | |
1696 | } | |
0c317a02 | 1697 | |
4c8dea63 JB |
1698 | if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
1699 | if (*beacon_int_gcd) | |
1700 | *beacon_int_different = true; | |
1701 | *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); | |
56d1893d | 1702 | } |
4c8dea63 | 1703 | } |
56d1893d | 1704 | |
4c8dea63 JB |
1705 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1706 | enum nl80211_iftype iftype, u32 beacon_int) | |
1707 | { | |
1708 | /* | |
1709 | * This is just a basic pre-condition check; if interface combinations | |
1710 | * are possible the driver must already be checking those with a call | |
1711 | * to cfg80211_check_combinations(), in which case we'll validate more | |
1712 | * through the cfg80211_calculate_bi_data() call and code in | |
1713 | * cfg80211_iter_combinations(). | |
1714 | */ | |
1715 | ||
1716 | if (beacon_int < 10 || beacon_int > 10000) | |
1717 | return -EINVAL; | |
1718 | ||
1719 | return 0; | |
56d1893d | 1720 | } |
7527a782 | 1721 | |
65a124dd | 1722 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
e227300c | 1723 | struct iface_combination_params *params, |
65a124dd MK |
1724 | void (*iter)(const struct ieee80211_iface_combination *c, |
1725 | void *data), | |
1726 | void *data) | |
cb2d956d | 1727 | { |
8c48b50a FF |
1728 | const struct ieee80211_regdomain *regdom; |
1729 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1730 | int i, j, iftype; |
1731 | int num_interfaces = 0; | |
1732 | u32 used_iftypes = 0; | |
4c8dea63 JB |
1733 | u32 beacon_int_gcd; |
1734 | bool beacon_int_different; | |
1735 | ||
1736 | /* | |
1737 | * This is a bit strange, since the iteration used to rely only on | |
1738 | * the data given by the driver, but here it now relies on context, | |
1739 | * in form of the currently operating interfaces. | |
1740 | * This is OK for all current users, and saves us from having to | |
1741 | * push the GCD calculations into all the drivers. | |
1742 | * In the future, this should probably rely more on data that's in | |
1743 | * cfg80211 already - the only thing not would appear to be any new | |
1744 | * interfaces (while being brought up) and channel/radar data. | |
1745 | */ | |
1746 | cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, | |
1747 | &beacon_int_gcd, &beacon_int_different); | |
cb2d956d | 1748 | |
e227300c | 1749 | if (params->radar_detect) { |
8c48b50a FF |
1750 | rcu_read_lock(); |
1751 | regdom = rcu_dereference(cfg80211_regdomain); | |
1752 | if (regdom) | |
1753 | region = regdom->dfs_region; | |
1754 | rcu_read_unlock(); | |
1755 | } | |
1756 | ||
cb2d956d | 1757 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
e227300c PK |
1758 | num_interfaces += params->iftype_num[iftype]; |
1759 | if (params->iftype_num[iftype] > 0 && | |
e6f40511 | 1760 | !cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
cb2d956d LC |
1761 | used_iftypes |= BIT(iftype); |
1762 | } | |
1763 | ||
1764 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1765 | const struct ieee80211_iface_combination *c; | |
1766 | struct ieee80211_iface_limit *limits; | |
1767 | u32 all_iftypes = 0; | |
1768 | ||
1769 | c = &wiphy->iface_combinations[i]; | |
1770 | ||
1771 | if (num_interfaces > c->max_interfaces) | |
1772 | continue; | |
e227300c | 1773 | if (params->num_different_channels > c->num_different_channels) |
cb2d956d LC |
1774 | continue; |
1775 | ||
1776 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1777 | GFP_KERNEL); | |
1778 | if (!limits) | |
1779 | return -ENOMEM; | |
1780 | ||
1781 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
e6f40511 | 1782 | if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) |
cb2d956d LC |
1783 | continue; |
1784 | for (j = 0; j < c->n_limits; j++) { | |
1785 | all_iftypes |= limits[j].types; | |
1786 | if (!(limits[j].types & BIT(iftype))) | |
1787 | continue; | |
e227300c | 1788 | if (limits[j].max < params->iftype_num[iftype]) |
cb2d956d | 1789 | goto cont; |
e227300c | 1790 | limits[j].max -= params->iftype_num[iftype]; |
cb2d956d LC |
1791 | } |
1792 | } | |
1793 | ||
e227300c PK |
1794 | if (params->radar_detect != |
1795 | (c->radar_detect_widths & params->radar_detect)) | |
cb2d956d LC |
1796 | goto cont; |
1797 | ||
e227300c | 1798 | if (params->radar_detect && c->radar_detect_regions && |
8c48b50a FF |
1799 | !(c->radar_detect_regions & BIT(region))) |
1800 | goto cont; | |
1801 | ||
cb2d956d LC |
1802 | /* Finally check that all iftypes that we're currently |
1803 | * using are actually part of this combination. If they | |
1804 | * aren't then we can't use this combination and have | |
1805 | * to continue to the next. | |
1806 | */ | |
1807 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1808 | goto cont; | |
1809 | ||
4c8dea63 | 1810 | if (beacon_int_gcd) { |
0c317a02 | 1811 | if (c->beacon_int_min_gcd && |
4c8dea63 | 1812 | beacon_int_gcd < c->beacon_int_min_gcd) |
0507a3ac | 1813 | goto cont; |
4c8dea63 | 1814 | if (!c->beacon_int_min_gcd && beacon_int_different) |
0c317a02 PK |
1815 | goto cont; |
1816 | } | |
1817 | ||
cb2d956d LC |
1818 | /* This combination covered all interface types and |
1819 | * supported the requested numbers, so we're good. | |
1820 | */ | |
65a124dd MK |
1821 | |
1822 | (*iter)(c, data); | |
cb2d956d LC |
1823 | cont: |
1824 | kfree(limits); | |
1825 | } | |
1826 | ||
65a124dd MK |
1827 | return 0; |
1828 | } | |
1829 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1830 | ||
1831 | static void | |
1832 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1833 | void *data) | |
1834 | { | |
1835 | int *num = data; | |
1836 | (*num)++; | |
1837 | } | |
1838 | ||
1839 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
e227300c | 1840 | struct iface_combination_params *params) |
65a124dd MK |
1841 | { |
1842 | int err, num = 0; | |
1843 | ||
e227300c | 1844 | err = cfg80211_iter_combinations(wiphy, params, |
65a124dd MK |
1845 | cfg80211_iter_sum_ifcombs, &num); |
1846 | if (err) | |
1847 | return err; | |
1848 | if (num == 0) | |
1849 | return -EBUSY; | |
1850 | ||
1851 | return 0; | |
cb2d956d LC |
1852 | } |
1853 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1854 | ||
34850ab2 JB |
1855 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1856 | const u8 *rates, unsigned int n_rates, | |
1857 | u32 *mask) | |
1858 | { | |
1859 | int i, j; | |
1860 | ||
a401d2bb JB |
1861 | if (!sband) |
1862 | return -EINVAL; | |
1863 | ||
34850ab2 JB |
1864 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1865 | return -EINVAL; | |
1866 | ||
1867 | *mask = 0; | |
1868 | ||
1869 | for (i = 0; i < n_rates; i++) { | |
1870 | int rate = (rates[i] & 0x7f) * 5; | |
1871 | bool found = false; | |
1872 | ||
1873 | for (j = 0; j < sband->n_bitrates; j++) { | |
1874 | if (sband->bitrates[j].bitrate == rate) { | |
1875 | found = true; | |
1876 | *mask |= BIT(j); | |
1877 | break; | |
1878 | } | |
1879 | } | |
1880 | if (!found) | |
1881 | return -EINVAL; | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * mask must have at least one bit set here since we | |
1886 | * didn't accept a 0-length rates array nor allowed | |
1887 | * entries in the array that didn't exist | |
1888 | */ | |
1889 | ||
1890 | return 0; | |
1891 | } | |
11a2a357 | 1892 | |
bdfbec2d IP |
1893 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1894 | { | |
57fbcce3 | 1895 | enum nl80211_band band; |
bdfbec2d IP |
1896 | unsigned int n_channels = 0; |
1897 | ||
57fbcce3 | 1898 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1899 | if (wiphy->bands[band]) |
1900 | n_channels += wiphy->bands[band]->n_channels; | |
1901 | ||
1902 | return n_channels; | |
1903 | } | |
1904 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1905 | ||
7406353d AQ |
1906 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1907 | struct station_info *sinfo) | |
1908 | { | |
1909 | struct cfg80211_registered_device *rdev; | |
1910 | struct wireless_dev *wdev; | |
1911 | ||
1912 | wdev = dev->ieee80211_ptr; | |
1913 | if (!wdev) | |
1914 | return -EOPNOTSUPP; | |
1915 | ||
1916 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1917 | if (!rdev->ops->get_station) | |
1918 | return -EOPNOTSUPP; | |
1919 | ||
3c12d048 SE |
1920 | memset(sinfo, 0, sizeof(*sinfo)); |
1921 | ||
7406353d AQ |
1922 | return rdev_get_station(rdev, dev, mac_addr, sinfo); |
1923 | } | |
1924 | EXPORT_SYMBOL(cfg80211_get_station); | |
1925 | ||
a442b761 AB |
1926 | void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
1927 | { | |
1928 | int i; | |
1929 | ||
1930 | if (!f) | |
1931 | return; | |
1932 | ||
1933 | kfree(f->serv_spec_info); | |
1934 | kfree(f->srf_bf); | |
1935 | kfree(f->srf_macs); | |
1936 | for (i = 0; i < f->num_rx_filters; i++) | |
1937 | kfree(f->rx_filters[i].filter); | |
1938 | ||
1939 | for (i = 0; i < f->num_tx_filters; i++) | |
1940 | kfree(f->tx_filters[i].filter); | |
1941 | ||
1942 | kfree(f->rx_filters); | |
1943 | kfree(f->tx_filters); | |
1944 | kfree(f); | |
1945 | } | |
1946 | EXPORT_SYMBOL(cfg80211_free_nan_func); | |
1947 | ||
4787cfa0 RM |
1948 | bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
1949 | u32 center_freq_khz, u32 bw_khz) | |
1950 | { | |
1951 | u32 start_freq_khz, end_freq_khz; | |
1952 | ||
1953 | start_freq_khz = center_freq_khz - (bw_khz / 2); | |
1954 | end_freq_khz = center_freq_khz + (bw_khz / 2); | |
1955 | ||
1956 | if (start_freq_khz >= freq_range->start_freq_khz && | |
1957 | end_freq_khz <= freq_range->end_freq_khz) | |
1958 | return true; | |
1959 | ||
1960 | return false; | |
1961 | } | |
1962 | ||
8689c051 AS |
1963 | int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) |
1964 | { | |
1d211d43 JB |
1965 | sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1, |
1966 | sizeof(*(sinfo->pertid)), | |
1967 | gfp); | |
8689c051 AS |
1968 | if (!sinfo->pertid) |
1969 | return -ENOMEM; | |
1970 | ||
1971 | return 0; | |
1972 | } | |
1973 | EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); | |
1974 | ||
11a2a357 JB |
1975 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1976 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1977 | const unsigned char rfc1042_header[] __aligned(2) = | |
1978 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1979 | EXPORT_SYMBOL(rfc1042_header); | |
1980 | ||
1981 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1982 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1983 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1984 | EXPORT_SYMBOL(bridge_tunnel_header); | |
30ca1aa5 DL |
1985 | |
1986 | /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ | |
1987 | struct iapp_layer2_update { | |
1988 | u8 da[ETH_ALEN]; /* broadcast */ | |
1989 | u8 sa[ETH_ALEN]; /* STA addr */ | |
1990 | __be16 len; /* 6 */ | |
1991 | u8 dsap; /* 0 */ | |
1992 | u8 ssap; /* 0 */ | |
1993 | u8 control; | |
1994 | u8 xid_info[3]; | |
1995 | } __packed; | |
1996 | ||
1997 | void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) | |
1998 | { | |
1999 | struct iapp_layer2_update *msg; | |
2000 | struct sk_buff *skb; | |
2001 | ||
2002 | /* Send Level 2 Update Frame to update forwarding tables in layer 2 | |
2003 | * bridge devices */ | |
2004 | ||
2005 | skb = dev_alloc_skb(sizeof(*msg)); | |
2006 | if (!skb) | |
2007 | return; | |
2008 | msg = skb_put(skb, sizeof(*msg)); | |
2009 | ||
2010 | /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) | |
2011 | * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ | |
2012 | ||
2013 | eth_broadcast_addr(msg->da); | |
2014 | ether_addr_copy(msg->sa, addr); | |
2015 | msg->len = htons(6); | |
2016 | msg->dsap = 0; | |
2017 | msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ | |
2018 | msg->control = 0xaf; /* XID response lsb.1111F101. | |
2019 | * F=0 (no poll command; unsolicited frame) */ | |
2020 | msg->xid_info[0] = 0x81; /* XID format identifier */ | |
2021 | msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ | |
2022 | msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ | |
2023 | ||
2024 | skb->dev = dev; | |
2025 | skb->protocol = eth_type_trans(skb, dev); | |
2026 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2027 | netif_rx_ni(skb); | |
2028 | } | |
2029 | EXPORT_SYMBOL(cfg80211_send_layer2_update); | |
b0aa75f0 JB |
2030 | |
2031 | int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, | |
2032 | enum ieee80211_vht_chanwidth bw, | |
2033 | int mcs, bool ext_nss_bw_capable) | |
2034 | { | |
2035 | u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); | |
2036 | int max_vht_nss = 0; | |
2037 | int ext_nss_bw; | |
2038 | int supp_width; | |
2039 | int i, mcs_encoding; | |
2040 | ||
2041 | if (map == 0xffff) | |
2042 | return 0; | |
2043 | ||
2044 | if (WARN_ON(mcs > 9)) | |
2045 | return 0; | |
2046 | if (mcs <= 7) | |
2047 | mcs_encoding = 0; | |
2048 | else if (mcs == 8) | |
2049 | mcs_encoding = 1; | |
2050 | else | |
2051 | mcs_encoding = 2; | |
2052 | ||
2053 | /* find max_vht_nss for the given MCS */ | |
2054 | for (i = 7; i >= 0; i--) { | |
2055 | int supp = (map >> (2 * i)) & 3; | |
2056 | ||
2057 | if (supp == 3) | |
2058 | continue; | |
2059 | ||
2060 | if (supp >= mcs_encoding) { | |
1a473d60 | 2061 | max_vht_nss = i + 1; |
b0aa75f0 JB |
2062 | break; |
2063 | } | |
2064 | } | |
2065 | ||
2066 | if (!(cap->supp_mcs.tx_mcs_map & | |
2067 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) | |
2068 | return max_vht_nss; | |
2069 | ||
2070 | ext_nss_bw = le32_get_bits(cap->vht_cap_info, | |
2071 | IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); | |
2072 | supp_width = le32_get_bits(cap->vht_cap_info, | |
2073 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); | |
2074 | ||
2075 | /* if not capable, treat ext_nss_bw as 0 */ | |
2076 | if (!ext_nss_bw_capable) | |
2077 | ext_nss_bw = 0; | |
2078 | ||
2079 | /* This is invalid */ | |
2080 | if (supp_width == 3) | |
2081 | return 0; | |
2082 | ||
2083 | /* This is an invalid combination so pretend nothing is supported */ | |
2084 | if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
2085 | return 0; | |
2086 | ||
2087 | /* | |
2088 | * Cover all the special cases according to IEEE 802.11-2016 | |
2089 | * Table 9-250. All other cases are either factor of 1 or not | |
2090 | * valid/supported. | |
2091 | */ | |
2092 | switch (bw) { | |
2093 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
2094 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
2095 | if ((supp_width == 1 || supp_width == 2) && | |
2096 | ext_nss_bw == 3) | |
2097 | return 2 * max_vht_nss; | |
2098 | break; | |
2099 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
2100 | if (supp_width == 0 && | |
2101 | (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
93bc8ac4 | 2102 | return max_vht_nss / 2; |
b0aa75f0 JB |
2103 | if (supp_width == 0 && |
2104 | ext_nss_bw == 3) | |
93bc8ac4 | 2105 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2106 | if (supp_width == 1 && |
2107 | ext_nss_bw == 3) | |
2108 | return 2 * max_vht_nss; | |
2109 | break; | |
2110 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
93bc8ac4 | 2111 | if (supp_width == 0 && ext_nss_bw == 1) |
b0aa75f0 JB |
2112 | return 0; /* not possible */ |
2113 | if (supp_width == 0 && | |
2114 | ext_nss_bw == 2) | |
93bc8ac4 | 2115 | return max_vht_nss / 2; |
b0aa75f0 JB |
2116 | if (supp_width == 0 && |
2117 | ext_nss_bw == 3) | |
93bc8ac4 | 2118 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2119 | if (supp_width == 1 && |
2120 | ext_nss_bw == 0) | |
2121 | return 0; /* not possible */ | |
2122 | if (supp_width == 1 && | |
2123 | ext_nss_bw == 1) | |
93bc8ac4 | 2124 | return max_vht_nss / 2; |
b0aa75f0 JB |
2125 | if (supp_width == 1 && |
2126 | ext_nss_bw == 2) | |
93bc8ac4 | 2127 | return (3 * max_vht_nss) / 4; |
b0aa75f0 JB |
2128 | break; |
2129 | } | |
2130 | ||
2131 | /* not covered or invalid combination received */ | |
2132 | return max_vht_nss; | |
2133 | } | |
2134 | EXPORT_SYMBOL(ieee80211_get_vht_max_nss); | |
e6f40511 MP |
2135 | |
2136 | bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype, | |
2137 | bool is_4addr, u8 check_swif) | |
2138 | ||
2139 | { | |
2140 | bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN; | |
2141 | ||
2142 | switch (check_swif) { | |
2143 | case 0: | |
2144 | if (is_vlan && is_4addr) | |
2145 | return wiphy->flags & WIPHY_FLAG_4ADDR_AP; | |
2146 | return wiphy->interface_modes & BIT(iftype); | |
2147 | case 1: | |
2148 | if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan) | |
2149 | return wiphy->flags & WIPHY_FLAG_4ADDR_AP; | |
2150 | return wiphy->software_iftypes & BIT(iftype); | |
2151 | default: | |
2152 | break; | |
2153 | } | |
2154 | ||
2155 | return false; | |
2156 | } | |
2157 | EXPORT_SYMBOL(cfg80211_iftype_allowed); |