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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 |
b0aa75f0 | 8 | * Copyright (C) 2018 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> |
8318d78a | 22 | #include "core.h" |
e35e4d28 HG |
23 | #include "rdev-ops.h" |
24 | ||
8318d78a | 25 | |
bd815252 JB |
26 | struct ieee80211_rate * |
27 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 28 | u32 basic_rates, int bitrate) |
bd815252 JB |
29 | { |
30 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
31 | int i; | |
32 | ||
33 | for (i = 0; i < sband->n_bitrates; i++) { | |
34 | if (!(basic_rates & BIT(i))) | |
35 | continue; | |
36 | if (sband->bitrates[i].bitrate > bitrate) | |
37 | continue; | |
38 | result = &sband->bitrates[i]; | |
39 | } | |
40 | ||
41 | return result; | |
42 | } | |
43 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
44 | ||
74608aca SW |
45 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
46 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
47 | { |
48 | struct ieee80211_rate *bitrates; | |
49 | u32 mandatory_rates = 0; | |
50 | enum ieee80211_rate_flags mandatory_flag; | |
51 | int i; | |
52 | ||
53 | if (WARN_ON(!sband)) | |
54 | return 1; | |
55 | ||
57fbcce3 | 56 | if (sband->band == NL80211_BAND_2GHZ) { |
74608aca SW |
57 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
58 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
59 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
60 | else | |
61 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
62 | } else { | |
b422c6cd | 63 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 64 | } |
b422c6cd AN |
65 | |
66 | bitrates = sband->bitrates; | |
67 | for (i = 0; i < sband->n_bitrates; i++) | |
68 | if (bitrates[i].flags & mandatory_flag) | |
69 | mandatory_rates |= BIT(i); | |
70 | return mandatory_rates; | |
71 | } | |
72 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
73 | ||
57fbcce3 | 74 | int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) |
8318d78a | 75 | { |
59eb21a6 BR |
76 | /* see 802.11 17.3.8.3.2 and Annex J |
77 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
78 | if (chan <= 0) |
79 | return 0; /* not supported */ | |
80 | switch (band) { | |
57fbcce3 | 81 | case NL80211_BAND_2GHZ: |
59eb21a6 BR |
82 | if (chan == 14) |
83 | return 2484; | |
84 | else if (chan < 14) | |
85 | return 2407 + chan * 5; | |
3a0c52a6 | 86 | break; |
57fbcce3 | 87 | case NL80211_BAND_5GHZ: |
3a0c52a6 VK |
88 | if (chan >= 182 && chan <= 196) |
89 | return 4000 + chan * 5; | |
59eb21a6 | 90 | else |
3a0c52a6 VK |
91 | return 5000 + chan * 5; |
92 | break; | |
57fbcce3 | 93 | case NL80211_BAND_60GHZ: |
9cf0a0b4 | 94 | if (chan < 7) |
3a0c52a6 VK |
95 | return 56160 + chan * 2160; |
96 | break; | |
97 | default: | |
98 | ; | |
59eb21a6 | 99 | } |
3a0c52a6 | 100 | return 0; /* not supported */ |
8318d78a JB |
101 | } |
102 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
103 | ||
104 | int ieee80211_frequency_to_channel(int freq) | |
105 | { | |
59eb21a6 | 106 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
107 | if (freq == 2484) |
108 | return 14; | |
59eb21a6 | 109 | else if (freq < 2484) |
8318d78a | 110 | return (freq - 2407) / 5; |
59eb21a6 BR |
111 | else if (freq >= 4910 && freq <= 4980) |
112 | return (freq - 4000) / 5; | |
3a0c52a6 | 113 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 114 | return (freq - 5000) / 5; |
9cf0a0b4 | 115 | else if (freq >= 58320 && freq <= 70200) |
3a0c52a6 VK |
116 | return (freq - 56160) / 2160; |
117 | else | |
118 | return 0; | |
8318d78a JB |
119 | } |
120 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
121 | ||
543b921b | 122 | struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq) |
906c730a | 123 | { |
57fbcce3 | 124 | enum nl80211_band band; |
906c730a JB |
125 | struct ieee80211_supported_band *sband; |
126 | int i; | |
127 | ||
57fbcce3 | 128 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
129 | sband = wiphy->bands[band]; |
130 | ||
131 | if (!sband) | |
132 | continue; | |
133 | ||
134 | for (i = 0; i < sband->n_channels; i++) { | |
135 | if (sband->channels[i].center_freq == freq) | |
136 | return &sband->channels[i]; | |
137 | } | |
138 | } | |
139 | ||
140 | return NULL; | |
141 | } | |
543b921b | 142 | EXPORT_SYMBOL(ieee80211_get_channel); |
906c730a | 143 | |
343884c8 | 144 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
8318d78a JB |
145 | { |
146 | int i, want; | |
147 | ||
343884c8 | 148 | switch (sband->band) { |
57fbcce3 | 149 | case NL80211_BAND_5GHZ: |
8318d78a JB |
150 | want = 3; |
151 | for (i = 0; i < sband->n_bitrates; i++) { | |
152 | if (sband->bitrates[i].bitrate == 60 || | |
153 | sband->bitrates[i].bitrate == 120 || | |
154 | sband->bitrates[i].bitrate == 240) { | |
155 | sband->bitrates[i].flags |= | |
156 | IEEE80211_RATE_MANDATORY_A; | |
157 | want--; | |
158 | } | |
159 | } | |
160 | WARN_ON(want); | |
161 | break; | |
57fbcce3 | 162 | case NL80211_BAND_2GHZ: |
8318d78a JB |
163 | want = 7; |
164 | for (i = 0; i < sband->n_bitrates; i++) { | |
1bd773c0 RS |
165 | switch (sband->bitrates[i].bitrate) { |
166 | case 10: | |
167 | case 20: | |
168 | case 55: | |
169 | case 110: | |
8318d78a JB |
170 | sband->bitrates[i].flags |= |
171 | IEEE80211_RATE_MANDATORY_B | | |
172 | IEEE80211_RATE_MANDATORY_G; | |
173 | want--; | |
1bd773c0 RS |
174 | break; |
175 | case 60: | |
176 | case 120: | |
177 | case 240: | |
8318d78a JB |
178 | sband->bitrates[i].flags |= |
179 | IEEE80211_RATE_MANDATORY_G; | |
180 | want--; | |
1bd773c0 RS |
181 | /* fall through */ |
182 | default: | |
8318d78a JB |
183 | sband->bitrates[i].flags |= |
184 | IEEE80211_RATE_ERP_G; | |
1bd773c0 RS |
185 | break; |
186 | } | |
8318d78a | 187 | } |
1bd773c0 | 188 | WARN_ON(want != 0 && want != 3); |
8318d78a | 189 | break; |
57fbcce3 | 190 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
191 | /* check for mandatory HT MCS 1..4 */ |
192 | WARN_ON(!sband->ht_cap.ht_supported); | |
193 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
194 | break; | |
57fbcce3 | 195 | case NUM_NL80211_BANDS: |
343884c8 | 196 | default: |
8318d78a JB |
197 | WARN_ON(1); |
198 | break; | |
199 | } | |
200 | } | |
201 | ||
202 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
203 | { | |
57fbcce3 | 204 | enum nl80211_band band; |
8318d78a | 205 | |
57fbcce3 | 206 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a | 207 | if (wiphy->bands[band]) |
343884c8 | 208 | set_mandatory_flags_band(wiphy->bands[band]); |
8318d78a | 209 | } |
08645126 | 210 | |
38ba3c57 JM |
211 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
212 | { | |
213 | int i; | |
214 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
215 | if (cipher == wiphy->cipher_suites[i]) | |
216 | return true; | |
217 | return false; | |
218 | } | |
219 | ||
fffd0934 JB |
220 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
221 | struct key_params *params, int key_idx, | |
e31b8213 | 222 | bool pairwise, const u8 *mac_addr) |
08645126 | 223 | { |
e9c8f8d3 | 224 | if (key_idx < 0 || key_idx > 5) |
08645126 JB |
225 | return -EINVAL; |
226 | ||
e31b8213 JB |
227 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
228 | return -EINVAL; | |
229 | ||
230 | if (pairwise && !mac_addr) | |
231 | return -EINVAL; | |
232 | ||
37720569 JM |
233 | switch (params->cipher) { |
234 | case WLAN_CIPHER_SUITE_TKIP: | |
235 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
236 | case WLAN_CIPHER_SUITE_CCMP_256: |
237 | case WLAN_CIPHER_SUITE_GCMP: | |
238 | case WLAN_CIPHER_SUITE_GCMP_256: | |
37720569 JM |
239 | /* Disallow pairwise keys with non-zero index unless it's WEP |
240 | * or a vendor specific cipher (because current deployments use | |
241 | * pairwise WEP keys with non-zero indices and for vendor | |
242 | * specific ciphers this should be validated in the driver or | |
243 | * hardware level - but 802.11i clearly specifies to use zero) | |
244 | */ | |
245 | if (pairwise && key_idx) | |
246 | return -EINVAL; | |
247 | break; | |
248 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
249 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
250 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
251 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
252 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
253 | if (pairwise) | |
254 | return -EINVAL; | |
e9c8f8d3 JB |
255 | if (key_idx < 4) |
256 | return -EINVAL; | |
37720569 | 257 | break; |
e9c8f8d3 JB |
258 | case WLAN_CIPHER_SUITE_WEP40: |
259 | case WLAN_CIPHER_SUITE_WEP104: | |
260 | if (key_idx > 3) | |
261 | return -EINVAL; | |
37720569 JM |
262 | default: |
263 | break; | |
264 | } | |
08645126 | 265 | |
08645126 JB |
266 | switch (params->cipher) { |
267 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 268 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
269 | return -EINVAL; |
270 | break; | |
271 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 272 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
273 | return -EINVAL; |
274 | break; | |
275 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 276 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
277 | return -EINVAL; |
278 | break; | |
cfcf1682 JM |
279 | case WLAN_CIPHER_SUITE_CCMP_256: |
280 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
281 | return -EINVAL; | |
282 | break; | |
283 | case WLAN_CIPHER_SUITE_GCMP: | |
284 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
285 | return -EINVAL; | |
286 | break; | |
287 | case WLAN_CIPHER_SUITE_GCMP_256: | |
288 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
289 | return -EINVAL; | |
290 | break; | |
08645126 | 291 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 292 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
293 | return -EINVAL; |
294 | break; | |
295 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 296 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
297 | return -EINVAL; |
298 | break; | |
cfcf1682 JM |
299 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
300 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
301 | return -EINVAL; | |
302 | break; | |
303 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
304 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
305 | return -EINVAL; | |
306 | break; | |
307 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
308 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
309 | return -EINVAL; | |
310 | break; | |
08645126 | 311 | default: |
7d64b7cc JB |
312 | /* |
313 | * We don't know anything about this algorithm, | |
314 | * allow using it -- but the driver must check | |
315 | * all parameters! We still check below whether | |
316 | * or not the driver supports this algorithm, | |
317 | * of course. | |
318 | */ | |
319 | break; | |
08645126 JB |
320 | } |
321 | ||
9f26a952 JM |
322 | if (params->seq) { |
323 | switch (params->cipher) { | |
324 | case WLAN_CIPHER_SUITE_WEP40: | |
325 | case WLAN_CIPHER_SUITE_WEP104: | |
326 | /* These ciphers do not use key sequence */ | |
327 | return -EINVAL; | |
328 | case WLAN_CIPHER_SUITE_TKIP: | |
329 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
330 | case WLAN_CIPHER_SUITE_CCMP_256: |
331 | case WLAN_CIPHER_SUITE_GCMP: | |
332 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 333 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
334 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
335 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
336 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
337 | if (params->seq_len != 6) |
338 | return -EINVAL; | |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
38ba3c57 | 343 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
344 | return -EINVAL; |
345 | ||
08645126 JB |
346 | return 0; |
347 | } | |
e31a16d6 | 348 | |
633adf1a | 349 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
350 | { |
351 | unsigned int hdrlen = 24; | |
352 | ||
353 | if (ieee80211_is_data(fc)) { | |
354 | if (ieee80211_has_a4(fc)) | |
355 | hdrlen = 30; | |
d0dd2de0 | 356 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 357 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
358 | if (ieee80211_has_order(fc)) |
359 | hdrlen += IEEE80211_HT_CTL_LEN; | |
360 | } | |
e31a16d6 ZY |
361 | goto out; |
362 | } | |
363 | ||
fb142f4b FC |
364 | if (ieee80211_is_mgmt(fc)) { |
365 | if (ieee80211_has_order(fc)) | |
366 | hdrlen += IEEE80211_HT_CTL_LEN; | |
367 | goto out; | |
368 | } | |
369 | ||
e31a16d6 ZY |
370 | if (ieee80211_is_ctl(fc)) { |
371 | /* | |
372 | * ACK and CTS are 10 bytes, all others 16. To see how | |
373 | * to get this condition consider | |
374 | * subtype mask: 0b0000000011110000 (0x00F0) | |
375 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
376 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
377 | * bits that matter: ^^^ (0x00E0) | |
378 | * value of those: 0b0000000011000000 (0x00C0) | |
379 | */ | |
380 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
381 | hdrlen = 10; | |
382 | else | |
383 | hdrlen = 16; | |
384 | } | |
385 | out: | |
386 | return hdrlen; | |
387 | } | |
388 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
389 | ||
390 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
391 | { | |
392 | const struct ieee80211_hdr *hdr = | |
393 | (const struct ieee80211_hdr *)skb->data; | |
394 | unsigned int hdrlen; | |
395 | ||
396 | if (unlikely(skb->len < 10)) | |
397 | return 0; | |
398 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
399 | if (unlikely(hdrlen > skb->len)) | |
400 | return 0; | |
401 | return hdrlen; | |
402 | } | |
403 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
404 | ||
2d1c304c | 405 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 406 | { |
2d1c304c | 407 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 408 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 409 | switch (ae) { |
7dd111e8 | 410 | default: |
e31a16d6 ZY |
411 | case 0: |
412 | return 6; | |
3c5772a5 | 413 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 414 | return 12; |
3c5772a5 | 415 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 416 | return 18; |
e31a16d6 ZY |
417 | } |
418 | } | |
2d1c304c FF |
419 | |
420 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
421 | { | |
422 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
423 | } | |
9b395bc3 | 424 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 425 | |
7f6990c8 | 426 | int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
24bba078 FF |
427 | const u8 *addr, enum nl80211_iftype iftype, |
428 | u8 data_offset) | |
e31a16d6 ZY |
429 | { |
430 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
431 | struct { |
432 | u8 hdr[ETH_ALEN] __aligned(2); | |
433 | __be16 proto; | |
434 | } payload; | |
435 | struct ethhdr tmp; | |
436 | u16 hdrlen; | |
437 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
438 | |
439 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
440 | return -1; | |
441 | ||
24bba078 | 442 | hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; |
2d1c304c FF |
443 | if (skb->len < hdrlen + 8) |
444 | return -1; | |
e31a16d6 ZY |
445 | |
446 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
447 | * header | |
448 | * IEEE 802.11 address fields: | |
449 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
450 | * 0 0 DA SA BSSID n/a | |
451 | * 0 1 DA BSSID SA n/a | |
452 | * 1 0 BSSID SA DA n/a | |
453 | * 1 1 RA TA DA SA | |
454 | */ | |
2d1c304c FF |
455 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
456 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
457 | ||
458 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
459 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 | 460 | |
5667c86a RM |
461 | mesh_flags &= MESH_FLAGS_AE; |
462 | ||
e31a16d6 ZY |
463 | switch (hdr->frame_control & |
464 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
465 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
466 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
467 | iftype != NL80211_IFTYPE_AP_VLAN && |
468 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
469 | return -1; |
470 | break; | |
471 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
472 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
473 | iftype != NL80211_IFTYPE_MESH_POINT && |
474 | iftype != NL80211_IFTYPE_AP_VLAN && | |
475 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
476 | return -1; |
477 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
5667c86a | 478 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f | 479 | return -1; |
5667c86a | 480 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
481 | skb_copy_bits(skb, hdrlen + |
482 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 483 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 484 | } |
2d1c304c | 485 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
486 | } |
487 | break; | |
488 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 489 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
490 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
491 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
492 | (is_multicast_ether_addr(tmp.h_dest) && |
493 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 494 | return -1; |
3c5772a5 | 495 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
5667c86a | 496 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 497 | return -1; |
5667c86a | 498 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
499 | skb_copy_bits(skb, hdrlen + |
500 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
501 | tmp.h_source, ETH_ALEN); |
502 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 503 | } |
e31a16d6 ZY |
504 | break; |
505 | case cpu_to_le16(0): | |
941c93cd | 506 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
507 | iftype != NL80211_IFTYPE_STATION && |
508 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 509 | return -1; |
e31a16d6 ZY |
510 | break; |
511 | } | |
512 | ||
2d1c304c FF |
513 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
514 | tmp.h_proto = payload.proto; | |
e31a16d6 | 515 | |
2d1c304c FF |
516 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
517 | tmp.h_proto != htons(ETH_P_AARP) && | |
518 | tmp.h_proto != htons(ETH_P_IPX)) || | |
519 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
520 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
521 | * replace EtherType */ | |
2d1c304c FF |
522 | hdrlen += ETH_ALEN + 2; |
523 | else | |
c041778c | 524 | tmp.h_proto = htons(skb->len - hdrlen); |
2d1c304c FF |
525 | |
526 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 527 | |
2d1c304c | 528 | if (!ehdr) |
d58ff351 | 529 | ehdr = skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
530 | memcpy(ehdr, &tmp, sizeof(tmp)); |
531 | ||
e31a16d6 ZY |
532 | return 0; |
533 | } | |
7f6990c8 | 534 | EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
e31a16d6 | 535 | |
2b67f944 FF |
536 | static void |
537 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
538 | void *ptr, int len, int size) | |
539 | { | |
540 | struct skb_shared_info *sh = skb_shinfo(skb); | |
541 | int page_offset; | |
542 | ||
6d061f9f | 543 | page_ref_inc(page); |
2b67f944 FF |
544 | page_offset = ptr - page_address(page); |
545 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
546 | } | |
547 | ||
548 | static void | |
549 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
550 | int offset, int len) | |
551 | { | |
552 | struct skb_shared_info *sh = skb_shinfo(skb); | |
aa1702dd | 553 | const skb_frag_t *frag = &sh->frags[0]; |
2b67f944 FF |
554 | struct page *frag_page; |
555 | void *frag_ptr; | |
556 | int frag_len, frag_size; | |
557 | int head_size = skb->len - skb->data_len; | |
558 | int cur_len; | |
559 | ||
560 | frag_page = virt_to_head_page(skb->head); | |
561 | frag_ptr = skb->data; | |
562 | frag_size = head_size; | |
563 | ||
564 | while (offset >= frag_size) { | |
565 | offset -= frag_size; | |
2b67f944 FF |
566 | frag_page = skb_frag_page(frag); |
567 | frag_ptr = skb_frag_address(frag); | |
568 | frag_size = skb_frag_size(frag); | |
aa1702dd | 569 | frag++; |
2b67f944 FF |
570 | } |
571 | ||
572 | frag_ptr += offset; | |
573 | frag_len = frag_size - offset; | |
574 | ||
575 | cur_len = min(len, frag_len); | |
576 | ||
577 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
578 | len -= cur_len; | |
579 | ||
580 | while (len > 0) { | |
2b67f944 FF |
581 | frag_len = skb_frag_size(frag); |
582 | cur_len = min(len, frag_len); | |
583 | __frame_add_frag(frame, skb_frag_page(frag), | |
584 | skb_frag_address(frag), cur_len, frag_len); | |
585 | len -= cur_len; | |
aa1702dd | 586 | frag++; |
2b67f944 FF |
587 | } |
588 | } | |
589 | ||
230fd28a FF |
590 | static struct sk_buff * |
591 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 592 | int offset, int len, bool reuse_frag) |
230fd28a FF |
593 | { |
594 | struct sk_buff *frame; | |
2b67f944 | 595 | int cur_len = len; |
230fd28a FF |
596 | |
597 | if (skb->len - offset < len) | |
598 | return NULL; | |
599 | ||
2b67f944 FF |
600 | /* |
601 | * When reusing framents, copy some data to the head to simplify | |
602 | * ethernet header handling and speed up protocol header processing | |
603 | * in the stack later. | |
604 | */ | |
605 | if (reuse_frag) | |
606 | cur_len = min_t(int, len, 32); | |
607 | ||
230fd28a FF |
608 | /* |
609 | * Allocate and reserve two bytes more for payload | |
610 | * alignment since sizeof(struct ethhdr) is 14. | |
611 | */ | |
2b67f944 | 612 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
16a910a6 GG |
613 | if (!frame) |
614 | return NULL; | |
230fd28a FF |
615 | |
616 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
617 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
618 | ||
619 | len -= cur_len; | |
620 | if (!len) | |
621 | return frame; | |
622 | ||
623 | offset += cur_len; | |
624 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
625 | |
626 | return frame; | |
627 | } | |
eaf85ca7 ZY |
628 | |
629 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
630 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad | 631 | const unsigned int extra_headroom, |
8b935ee2 | 632 | const u8 *check_da, const u8 *check_sa) |
eaf85ca7 | 633 | { |
230fd28a | 634 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
635 | struct sk_buff *frame = NULL; |
636 | u16 ethertype; | |
637 | u8 *payload; | |
7f6990c8 | 638 | int offset = 0, remaining; |
230fd28a | 639 | struct ethhdr eth; |
2b67f944 | 640 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 641 | bool reuse_skb = false; |
230fd28a | 642 | bool last = false; |
88665f5a | 643 | |
230fd28a FF |
644 | while (!last) { |
645 | unsigned int subframe_len; | |
646 | int len; | |
eaf85ca7 | 647 | u8 padding; |
eaf85ca7 | 648 | |
230fd28a FF |
649 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
650 | len = ntohs(eth.h_proto); | |
651 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 652 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 653 | |
eaf85ca7 | 654 | /* the last MSDU has no padding */ |
230fd28a | 655 | remaining = skb->len - offset; |
eaf85ca7 ZY |
656 | if (subframe_len > remaining) |
657 | goto purge; | |
658 | ||
230fd28a | 659 | offset += sizeof(struct ethhdr); |
230fd28a | 660 | last = remaining <= subframe_len + padding; |
8b935ee2 JB |
661 | |
662 | /* FIXME: should we really accept multicast DA? */ | |
663 | if ((check_da && !is_multicast_ether_addr(eth.h_dest) && | |
664 | !ether_addr_equal(check_da, eth.h_dest)) || | |
665 | (check_sa && !ether_addr_equal(check_sa, eth.h_source))) { | |
666 | offset += len + padding; | |
667 | continue; | |
668 | } | |
669 | ||
670 | /* reuse skb for the last subframe */ | |
2b67f944 | 671 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 672 | skb_pull(skb, offset); |
eaf85ca7 | 673 | frame = skb; |
230fd28a FF |
674 | reuse_skb = true; |
675 | } else { | |
2b67f944 FF |
676 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
677 | reuse_frag); | |
eaf85ca7 ZY |
678 | if (!frame) |
679 | goto purge; | |
680 | ||
230fd28a | 681 | offset += len + padding; |
eaf85ca7 ZY |
682 | } |
683 | ||
684 | skb_reset_network_header(frame); | |
685 | frame->dev = skb->dev; | |
686 | frame->priority = skb->priority; | |
687 | ||
688 | payload = frame->data; | |
689 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 690 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 691 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 692 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
693 | eth.h_proto = htons(ethertype); |
694 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 695 | } |
230fd28a FF |
696 | |
697 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
698 | __skb_queue_tail(list, frame); |
699 | } | |
700 | ||
230fd28a FF |
701 | if (!reuse_skb) |
702 | dev_kfree_skb(skb); | |
703 | ||
eaf85ca7 ZY |
704 | return; |
705 | ||
706 | purge: | |
707 | __skb_queue_purge(list); | |
eaf85ca7 ZY |
708 | dev_kfree_skb(skb); |
709 | } | |
710 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
711 | ||
e31a16d6 | 712 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
713 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
714 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
715 | { |
716 | unsigned int dscp; | |
c6ca5e28 | 717 | unsigned char vlan_priority; |
e31a16d6 ZY |
718 | |
719 | /* skb->priority values from 256->263 are magic values to | |
720 | * directly indicate a specific 802.1d priority. This is used | |
721 | * to allow 802.1d priority to be passed directly in from VLAN | |
722 | * tags, etc. | |
723 | */ | |
724 | if (skb->priority >= 256 && skb->priority <= 263) | |
725 | return skb->priority - 256; | |
726 | ||
df8a39de JP |
727 | if (skb_vlan_tag_present(skb)) { |
728 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 V |
729 | >> VLAN_PRIO_SHIFT; |
730 | if (vlan_priority > 0) | |
731 | return vlan_priority; | |
732 | } | |
733 | ||
e31a16d6 ZY |
734 | switch (skb->protocol) { |
735 | case htons(ETH_P_IP): | |
b156579b DT |
736 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
737 | break; | |
738 | case htons(ETH_P_IPV6): | |
739 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 740 | break; |
960d97f9 SW |
741 | case htons(ETH_P_MPLS_UC): |
742 | case htons(ETH_P_MPLS_MC): { | |
743 | struct mpls_label mpls_tmp, *mpls; | |
744 | ||
745 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
746 | sizeof(*mpls), &mpls_tmp); | |
747 | if (!mpls) | |
748 | return 0; | |
749 | ||
750 | return (ntohl(mpls->entry) & MPLS_LS_TC_MASK) | |
751 | >> MPLS_LS_TC_SHIFT; | |
752 | } | |
753 | case htons(ETH_P_80221): | |
754 | /* 802.21 is always network control traffic */ | |
755 | return 7; | |
e31a16d6 ZY |
756 | default: |
757 | return 0; | |
758 | } | |
759 | ||
fa9ffc74 KP |
760 | if (qos_map) { |
761 | unsigned int i, tmp_dscp = dscp >> 2; | |
762 | ||
763 | for (i = 0; i < qos_map->num_des; i++) { | |
764 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) | |
765 | return qos_map->dscp_exception[i].up; | |
766 | } | |
767 | ||
768 | for (i = 0; i < 8; i++) { | |
769 | if (tmp_dscp >= qos_map->up[i].low && | |
770 | tmp_dscp <= qos_map->up[i].high) | |
771 | return i; | |
772 | } | |
773 | } | |
774 | ||
e31a16d6 ZY |
775 | return dscp >> 5; |
776 | } | |
777 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
778 | |
779 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
780 | { | |
9caf0364 JB |
781 | const struct cfg80211_bss_ies *ies; |
782 | ||
783 | ies = rcu_dereference(bss->ies); | |
784 | if (!ies) | |
517357c6 | 785 | return NULL; |
9caf0364 JB |
786 | |
787 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
788 | } |
789 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
790 | |
791 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
792 | { | |
f26cbf40 | 793 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
794 | struct net_device *dev = wdev->netdev; |
795 | int i; | |
796 | ||
797 | if (!wdev->connect_keys) | |
798 | return; | |
799 | ||
b8676221 | 800 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
fffd0934 JB |
801 | if (!wdev->connect_keys->params[i].cipher) |
802 | continue; | |
e35e4d28 HG |
803 | if (rdev_add_key(rdev, dev, i, false, NULL, |
804 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 805 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
806 | continue; |
807 | } | |
d4f29978 JB |
808 | if (wdev->connect_keys->def == i && |
809 | rdev_set_default_key(rdev, dev, i, true, true)) { | |
810 | netdev_err(dev, "failed to set defkey %d\n", i); | |
811 | continue; | |
812 | } | |
fffd0934 JB |
813 | } |
814 | ||
b47f610b | 815 | kzfree(wdev->connect_keys); |
fffd0934 JB |
816 | wdev->connect_keys = NULL; |
817 | } | |
3d54d255 | 818 | |
1f6fc43e | 819 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
820 | { |
821 | struct cfg80211_event *ev; | |
822 | unsigned long flags; | |
3d54d255 JB |
823 | |
824 | spin_lock_irqsave(&wdev->event_lock, flags); | |
825 | while (!list_empty(&wdev->event_list)) { | |
826 | ev = list_first_entry(&wdev->event_list, | |
827 | struct cfg80211_event, list); | |
828 | list_del(&ev->list); | |
829 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
830 | ||
831 | wdev_lock(wdev); | |
832 | switch (ev->type) { | |
833 | case EVENT_CONNECT_RESULT: | |
3d54d255 | 834 | __cfg80211_connect_result( |
5349a0f7 VK |
835 | wdev->netdev, |
836 | &ev->cr, | |
837 | ev->cr.status == WLAN_STATUS_SUCCESS); | |
3d54d255 JB |
838 | break; |
839 | case EVENT_ROAMED: | |
29ce6ecb | 840 | __cfg80211_roamed(wdev, &ev->rm); |
3d54d255 JB |
841 | break; |
842 | case EVENT_DISCONNECTED: | |
843 | __cfg80211_disconnected(wdev->netdev, | |
844 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
845 | ev->dc.reason, |
846 | !ev->dc.locally_generated); | |
3d54d255 JB |
847 | break; |
848 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
849 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
850 | ev->ij.channel); | |
3d54d255 | 851 | break; |
f04c2203 MK |
852 | case EVENT_STOPPED: |
853 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
854 | break; | |
503c1fb9 AS |
855 | case EVENT_PORT_AUTHORIZED: |
856 | __cfg80211_port_authorized(wdev, ev->pa.bssid); | |
857 | break; | |
3d54d255 JB |
858 | } |
859 | wdev_unlock(wdev); | |
860 | ||
861 | kfree(ev); | |
862 | ||
863 | spin_lock_irqsave(&wdev->event_lock, flags); | |
864 | } | |
865 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
866 | } | |
867 | ||
868 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
869 | { | |
870 | struct wireless_dev *wdev; | |
871 | ||
872 | ASSERT_RTNL(); | |
3d54d255 | 873 | |
53873f13 | 874 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 875 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
876 | } |
877 | ||
878 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
879 | struct net_device *dev, enum nl80211_iftype ntype, | |
818a986e | 880 | struct vif_params *params) |
3d54d255 JB |
881 | { |
882 | int err; | |
883 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
884 | ||
73fb08e2 | 885 | ASSERT_RTNL(); |
3d54d255 JB |
886 | |
887 | /* don't support changing VLANs, you just re-create them */ | |
888 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
889 | return -EOPNOTSUPP; | |
890 | ||
cb3b7d87 AB |
891 | /* cannot change into P2P device or NAN */ |
892 | if (ntype == NL80211_IFTYPE_P2P_DEVICE || | |
893 | ntype == NL80211_IFTYPE_NAN) | |
98104fde JB |
894 | return -EOPNOTSUPP; |
895 | ||
3d54d255 JB |
896 | if (!rdev->ops->change_virtual_intf || |
897 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
898 | return -EOPNOTSUPP; | |
899 | ||
ad4bb6f8 | 900 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 901 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
902 | (ntype == NL80211_IFTYPE_ADHOC || |
903 | ntype == NL80211_IFTYPE_STATION || | |
904 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
905 | return -EBUSY; |
906 | ||
6cbfb1bb | 907 | if (ntype != otype) { |
9bc383de | 908 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 909 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 910 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 911 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 912 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 913 | |
3d54d255 | 914 | switch (otype) { |
ac800140 | 915 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 916 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 917 | break; |
3d54d255 JB |
918 | case NL80211_IFTYPE_ADHOC: |
919 | cfg80211_leave_ibss(rdev, dev, false); | |
920 | break; | |
921 | case NL80211_IFTYPE_STATION: | |
074ac8df | 922 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 923 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
924 | cfg80211_disconnect(rdev, dev, |
925 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 926 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
927 | break; |
928 | case NL80211_IFTYPE_MESH_POINT: | |
929 | /* mesh should be handled? */ | |
930 | break; | |
931 | default: | |
932 | break; | |
933 | } | |
934 | ||
935 | cfg80211_process_rdev_events(rdev); | |
936 | } | |
937 | ||
818a986e | 938 | err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
3d54d255 JB |
939 | |
940 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
941 | ||
9bc383de JB |
942 | if (!err && params && params->use_4addr != -1) |
943 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
944 | ||
ad4bb6f8 JB |
945 | if (!err) { |
946 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
947 | switch (ntype) { | |
948 | case NL80211_IFTYPE_STATION: | |
949 | if (dev->ieee80211_ptr->use_4addr) | |
950 | break; | |
951 | /* fall through */ | |
6e0bd6c3 | 952 | case NL80211_IFTYPE_OCB: |
074ac8df | 953 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
954 | case NL80211_IFTYPE_ADHOC: |
955 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
956 | break; | |
074ac8df | 957 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
958 | case NL80211_IFTYPE_AP: |
959 | case NL80211_IFTYPE_AP_VLAN: | |
960 | case NL80211_IFTYPE_WDS: | |
961 | case NL80211_IFTYPE_MESH_POINT: | |
962 | /* bridging OK */ | |
963 | break; | |
964 | case NL80211_IFTYPE_MONITOR: | |
965 | /* monitor can't bridge anyway */ | |
966 | break; | |
967 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 968 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
969 | /* not happening */ |
970 | break; | |
98104fde | 971 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 972 | case NL80211_IFTYPE_NAN: |
98104fde JB |
973 | WARN_ON(1); |
974 | break; | |
ad4bb6f8 JB |
975 | } |
976 | } | |
977 | ||
dbbae26a MK |
978 | if (!err && ntype != otype && netif_running(dev)) { |
979 | cfg80211_update_iface_num(rdev, ntype, 1); | |
980 | cfg80211_update_iface_num(rdev, otype, -1); | |
981 | } | |
982 | ||
3d54d255 JB |
983 | return err; |
984 | } | |
254416aa | 985 | |
0c1eca4e JB |
986 | static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
987 | { | |
988 | int modulation, streams, bitrate; | |
989 | ||
990 | /* the formula below does only work for MCS values smaller than 32 */ | |
991 | if (WARN_ON_ONCE(rate->mcs >= 32)) | |
992 | return 0; | |
993 | ||
994 | modulation = rate->mcs & 7; | |
995 | streams = (rate->mcs >> 3) + 1; | |
996 | ||
997 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; | |
998 | ||
999 | if (modulation < 4) | |
1000 | bitrate *= (modulation + 1); | |
1001 | else if (modulation == 4) | |
1002 | bitrate *= (modulation + 2); | |
1003 | else | |
1004 | bitrate *= (modulation + 3); | |
1005 | ||
1006 | bitrate *= streams; | |
1007 | ||
1008 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1009 | bitrate = (bitrate / 9) * 10; | |
1010 | ||
1011 | /* do NOT round down here */ | |
1012 | return (bitrate + 50000) / 100000; | |
1013 | } | |
1014 | ||
95ddc1fc VK |
1015 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
1016 | { | |
1017 | static const u32 __mcs2bitrate[] = { | |
1018 | /* control PHY */ | |
1019 | [0] = 275, | |
1020 | /* SC PHY */ | |
1021 | [1] = 3850, | |
1022 | [2] = 7700, | |
1023 | [3] = 9625, | |
1024 | [4] = 11550, | |
1025 | [5] = 12512, /* 1251.25 mbps */ | |
1026 | [6] = 15400, | |
1027 | [7] = 19250, | |
1028 | [8] = 23100, | |
1029 | [9] = 25025, | |
1030 | [10] = 30800, | |
1031 | [11] = 38500, | |
1032 | [12] = 46200, | |
1033 | /* OFDM PHY */ | |
1034 | [13] = 6930, | |
1035 | [14] = 8662, /* 866.25 mbps */ | |
1036 | [15] = 13860, | |
1037 | [16] = 17325, | |
1038 | [17] = 20790, | |
1039 | [18] = 27720, | |
1040 | [19] = 34650, | |
1041 | [20] = 41580, | |
1042 | [21] = 45045, | |
1043 | [22] = 51975, | |
1044 | [23] = 62370, | |
1045 | [24] = 67568, /* 6756.75 mbps */ | |
1046 | /* LP-SC PHY */ | |
1047 | [25] = 6260, | |
1048 | [26] = 8340, | |
1049 | [27] = 11120, | |
1050 | [28] = 12510, | |
1051 | [29] = 16680, | |
1052 | [30] = 22240, | |
1053 | [31] = 25030, | |
1054 | }; | |
1055 | ||
1056 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1057 | return 0; | |
1058 | ||
1059 | return __mcs2bitrate[rate->mcs]; | |
1060 | } | |
1061 | ||
db9c64cf JB |
1062 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1063 | { | |
1064 | static const u32 base[4][10] = { | |
1065 | { 6500000, | |
1066 | 13000000, | |
1067 | 19500000, | |
1068 | 26000000, | |
1069 | 39000000, | |
1070 | 52000000, | |
1071 | 58500000, | |
1072 | 65000000, | |
1073 | 78000000, | |
8fdd136f PT |
1074 | /* not in the spec, but some devices use this: */ |
1075 | 86500000, | |
db9c64cf JB |
1076 | }, |
1077 | { 13500000, | |
1078 | 27000000, | |
1079 | 40500000, | |
1080 | 54000000, | |
1081 | 81000000, | |
1082 | 108000000, | |
1083 | 121500000, | |
1084 | 135000000, | |
1085 | 162000000, | |
1086 | 180000000, | |
1087 | }, | |
1088 | { 29300000, | |
1089 | 58500000, | |
1090 | 87800000, | |
1091 | 117000000, | |
1092 | 175500000, | |
1093 | 234000000, | |
1094 | 263300000, | |
1095 | 292500000, | |
1096 | 351000000, | |
1097 | 390000000, | |
1098 | }, | |
1099 | { 58500000, | |
1100 | 117000000, | |
1101 | 175500000, | |
1102 | 234000000, | |
1103 | 351000000, | |
1104 | 468000000, | |
1105 | 526500000, | |
1106 | 585000000, | |
1107 | 702000000, | |
1108 | 780000000, | |
1109 | }, | |
1110 | }; | |
1111 | u32 bitrate; | |
1112 | int idx; | |
1113 | ||
ca8fe250 JB |
1114 | if (rate->mcs > 9) |
1115 | goto warn; | |
db9c64cf | 1116 | |
b51f3bee JB |
1117 | switch (rate->bw) { |
1118 | case RATE_INFO_BW_160: | |
1119 | idx = 3; | |
1120 | break; | |
1121 | case RATE_INFO_BW_80: | |
1122 | idx = 2; | |
1123 | break; | |
1124 | case RATE_INFO_BW_40: | |
1125 | idx = 1; | |
1126 | break; | |
1127 | case RATE_INFO_BW_5: | |
1128 | case RATE_INFO_BW_10: | |
1129 | default: | |
ca8fe250 | 1130 | goto warn; |
b51f3bee JB |
1131 | case RATE_INFO_BW_20: |
1132 | idx = 0; | |
1133 | } | |
db9c64cf JB |
1134 | |
1135 | bitrate = base[idx][rate->mcs]; | |
1136 | bitrate *= rate->nss; | |
1137 | ||
1138 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1139 | bitrate = (bitrate / 9) * 10; | |
1140 | ||
1141 | /* do NOT round down here */ | |
1142 | return (bitrate + 50000) / 100000; | |
ca8fe250 JB |
1143 | warn: |
1144 | WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", | |
1145 | rate->bw, rate->mcs, rate->nss); | |
1146 | return 0; | |
db9c64cf JB |
1147 | } |
1148 | ||
c4cbaf79 LC |
1149 | static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) |
1150 | { | |
1151 | #define SCALE 2048 | |
1152 | u16 mcs_divisors[12] = { | |
1153 | 34133, /* 16.666666... */ | |
1154 | 17067, /* 8.333333... */ | |
1155 | 11378, /* 5.555555... */ | |
1156 | 8533, /* 4.166666... */ | |
1157 | 5689, /* 2.777777... */ | |
1158 | 4267, /* 2.083333... */ | |
1159 | 3923, /* 1.851851... */ | |
1160 | 3413, /* 1.666666... */ | |
1161 | 2844, /* 1.388888... */ | |
1162 | 2560, /* 1.250000... */ | |
1163 | 2276, /* 1.111111... */ | |
1164 | 2048, /* 1.000000... */ | |
1165 | }; | |
1166 | u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; | |
1167 | u32 rates_969[3] = { 480388888, 453700000, 408333333 }; | |
1168 | u32 rates_484[3] = { 229411111, 216666666, 195000000 }; | |
1169 | u32 rates_242[3] = { 114711111, 108333333, 97500000 }; | |
1170 | u32 rates_106[3] = { 40000000, 37777777, 34000000 }; | |
1171 | u32 rates_52[3] = { 18820000, 17777777, 16000000 }; | |
1172 | u32 rates_26[3] = { 9411111, 8888888, 8000000 }; | |
1173 | u64 tmp; | |
1174 | u32 result; | |
1175 | ||
1176 | if (WARN_ON_ONCE(rate->mcs > 11)) | |
1177 | return 0; | |
1178 | ||
1179 | if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) | |
1180 | return 0; | |
1181 | if (WARN_ON_ONCE(rate->he_ru_alloc > | |
1182 | NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) | |
1183 | return 0; | |
1184 | if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) | |
1185 | return 0; | |
1186 | ||
1187 | if (rate->bw == RATE_INFO_BW_160) | |
1188 | result = rates_160M[rate->he_gi]; | |
1189 | else if (rate->bw == RATE_INFO_BW_80 || | |
1190 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1191 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) | |
1192 | result = rates_969[rate->he_gi]; | |
1193 | else if (rate->bw == RATE_INFO_BW_40 || | |
1194 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1195 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) | |
1196 | result = rates_484[rate->he_gi]; | |
1197 | else if (rate->bw == RATE_INFO_BW_20 || | |
1198 | (rate->bw == RATE_INFO_BW_HE_RU && | |
1199 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) | |
1200 | result = rates_242[rate->he_gi]; | |
1201 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1202 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) | |
1203 | result = rates_106[rate->he_gi]; | |
1204 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1205 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) | |
1206 | result = rates_52[rate->he_gi]; | |
1207 | else if (rate->bw == RATE_INFO_BW_HE_RU && | |
1208 | rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) | |
1209 | result = rates_26[rate->he_gi]; | |
1210 | else if (WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", | |
1211 | rate->bw, rate->he_ru_alloc)) | |
1212 | return 0; | |
1213 | ||
1214 | /* now scale to the appropriate MCS */ | |
1215 | tmp = result; | |
1216 | tmp *= SCALE; | |
1217 | do_div(tmp, mcs_divisors[rate->mcs]); | |
1218 | result = tmp; | |
1219 | ||
1220 | /* and take NSS, DCM into account */ | |
1221 | result = (result * rate->nss) / 8; | |
1222 | if (rate->he_dcm) | |
1223 | result /= 2; | |
1224 | ||
1225 | return result; | |
1226 | } | |
1227 | ||
8eb41c8d | 1228 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa | 1229 | { |
0c1eca4e JB |
1230 | if (rate->flags & RATE_INFO_FLAGS_MCS) |
1231 | return cfg80211_calculate_bitrate_ht(rate); | |
95ddc1fc VK |
1232 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1233 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1234 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1235 | return cfg80211_calculate_bitrate_vht(rate); | |
c4cbaf79 LC |
1236 | if (rate->flags & RATE_INFO_FLAGS_HE_MCS) |
1237 | return cfg80211_calculate_bitrate_he(rate); | |
254416aa | 1238 | |
0c1eca4e | 1239 | return rate->legacy; |
254416aa | 1240 | } |
8097e149 | 1241 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1242 | |
c216e641 AS |
1243 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1244 | enum ieee80211_p2p_attr_id attr, | |
1245 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1246 | { |
1247 | u8 *out = buf; | |
1248 | u16 attr_remaining = 0; | |
1249 | bool desired_attr = false; | |
1250 | u16 desired_len = 0; | |
1251 | ||
1252 | while (len > 0) { | |
1253 | unsigned int iedatalen; | |
1254 | unsigned int copy; | |
1255 | const u8 *iedata; | |
1256 | ||
1257 | if (len < 2) | |
1258 | return -EILSEQ; | |
1259 | iedatalen = ies[1]; | |
1260 | if (iedatalen + 2 > len) | |
1261 | return -EILSEQ; | |
1262 | ||
1263 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1264 | goto cont; | |
1265 | ||
1266 | if (iedatalen < 4) | |
1267 | goto cont; | |
1268 | ||
1269 | iedata = ies + 2; | |
1270 | ||
1271 | /* check WFA OUI, P2P subtype */ | |
1272 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1273 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1274 | goto cont; | |
1275 | ||
1276 | iedatalen -= 4; | |
1277 | iedata += 4; | |
1278 | ||
1279 | /* check attribute continuation into this IE */ | |
1280 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1281 | if (copy && desired_attr) { | |
1282 | desired_len += copy; | |
1283 | if (out) { | |
1284 | memcpy(out, iedata, min(bufsize, copy)); | |
1285 | out += min(bufsize, copy); | |
1286 | bufsize -= min(bufsize, copy); | |
1287 | } | |
1288 | ||
1289 | ||
1290 | if (copy == attr_remaining) | |
1291 | return desired_len; | |
1292 | } | |
1293 | ||
1294 | attr_remaining -= copy; | |
1295 | if (attr_remaining) | |
1296 | goto cont; | |
1297 | ||
1298 | iedatalen -= copy; | |
1299 | iedata += copy; | |
1300 | ||
1301 | while (iedatalen > 0) { | |
1302 | u16 attr_len; | |
1303 | ||
1304 | /* P2P attribute ID & size must fit */ | |
1305 | if (iedatalen < 3) | |
1306 | return -EILSEQ; | |
1307 | desired_attr = iedata[0] == attr; | |
1308 | attr_len = get_unaligned_le16(iedata + 1); | |
1309 | iedatalen -= 3; | |
1310 | iedata += 3; | |
1311 | ||
1312 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1313 | ||
1314 | if (desired_attr) { | |
1315 | desired_len += copy; | |
1316 | if (out) { | |
1317 | memcpy(out, iedata, min(bufsize, copy)); | |
1318 | out += min(bufsize, copy); | |
1319 | bufsize -= min(bufsize, copy); | |
1320 | } | |
1321 | ||
1322 | if (copy == attr_len) | |
1323 | return desired_len; | |
1324 | } | |
1325 | ||
1326 | iedata += copy; | |
1327 | iedatalen -= copy; | |
1328 | attr_remaining = attr_len - copy; | |
1329 | } | |
1330 | ||
1331 | cont: | |
1332 | len -= ies[1] + 2; | |
1333 | ies += ies[1] + 2; | |
1334 | } | |
1335 | ||
1336 | if (attr_remaining && desired_attr) | |
1337 | return -EILSEQ; | |
1338 | ||
1339 | return -ENOENT; | |
1340 | } | |
1341 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1342 | ||
2512b1b1 | 1343 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) |
29464ccc JB |
1344 | { |
1345 | int i; | |
1346 | ||
2512b1b1 LK |
1347 | /* Make sure array values are legal */ |
1348 | if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) | |
1349 | return false; | |
1350 | ||
1351 | i = 0; | |
1352 | while (i < n_ids) { | |
1353 | if (ids[i] == WLAN_EID_EXTENSION) { | |
1354 | if (id_ext && (ids[i + 1] == id)) | |
1355 | return true; | |
1356 | ||
1357 | i += 2; | |
1358 | continue; | |
1359 | } | |
1360 | ||
1361 | if (ids[i] == id && !id_ext) | |
29464ccc | 1362 | return true; |
2512b1b1 LK |
1363 | |
1364 | i++; | |
1365 | } | |
29464ccc JB |
1366 | return false; |
1367 | } | |
1368 | ||
8ac63448 JB |
1369 | static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
1370 | { | |
1371 | /* we assume a validly formed IEs buffer */ | |
1372 | u8 len = ies[pos + 1]; | |
1373 | ||
1374 | pos += 2 + len; | |
1375 | ||
1376 | /* the IE itself must have 255 bytes for fragments to follow */ | |
1377 | if (len < 255) | |
1378 | return pos; | |
1379 | ||
1380 | while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { | |
1381 | len = ies[pos + 1]; | |
1382 | pos += 2 + len; | |
1383 | } | |
1384 | ||
1385 | return pos; | |
1386 | } | |
1387 | ||
29464ccc JB |
1388 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
1389 | const u8 *ids, int n_ids, | |
1390 | const u8 *after_ric, int n_after_ric, | |
1391 | size_t offset) | |
1392 | { | |
1393 | size_t pos = offset; | |
1394 | ||
2512b1b1 LK |
1395 | while (pos < ielen) { |
1396 | u8 ext = 0; | |
1397 | ||
1398 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1399 | ext = 2; | |
1400 | if ((pos + ext) >= ielen) | |
1401 | break; | |
1402 | ||
1403 | if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], | |
1404 | ies[pos] == WLAN_EID_EXTENSION)) | |
1405 | break; | |
1406 | ||
29464ccc | 1407 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { |
8ac63448 | 1408 | pos = skip_ie(ies, ielen, pos); |
29464ccc | 1409 | |
2512b1b1 LK |
1410 | while (pos < ielen) { |
1411 | if (ies[pos] == WLAN_EID_EXTENSION) | |
1412 | ext = 2; | |
1413 | else | |
1414 | ext = 0; | |
1415 | ||
1416 | if ((pos + ext) >= ielen) | |
1417 | break; | |
1418 | ||
1419 | if (!ieee80211_id_in_list(after_ric, | |
1420 | n_after_ric, | |
1421 | ies[pos + ext], | |
1422 | ext == 2)) | |
1423 | pos = skip_ie(ies, ielen, pos); | |
1424 | } | |
29464ccc | 1425 | } else { |
8ac63448 | 1426 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1427 | } |
1428 | } | |
1429 | ||
1430 | return pos; | |
1431 | } | |
1432 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1433 | ||
1ce3e82b | 1434 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1435 | enum nl80211_band *band) |
1ce3e82b JB |
1436 | { |
1437 | switch (operating_class) { | |
1438 | case 112: | |
1439 | case 115 ... 127: | |
954a86ef | 1440 | case 128 ... 130: |
57fbcce3 | 1441 | *band = NL80211_BAND_5GHZ; |
1ce3e82b JB |
1442 | return true; |
1443 | case 81: | |
1444 | case 82: | |
1445 | case 83: | |
1446 | case 84: | |
57fbcce3 | 1447 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1448 | return true; |
55300a13 | 1449 | case 180: |
57fbcce3 | 1450 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1451 | return true; |
1ce3e82b JB |
1452 | } |
1453 | ||
1454 | return false; | |
1455 | } | |
1456 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1457 | ||
a38700dd AN |
1458 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1459 | u8 *op_class) | |
1460 | { | |
1461 | u8 vht_opclass; | |
8442938c | 1462 | u32 freq = chandef->center_freq1; |
a38700dd AN |
1463 | |
1464 | if (freq >= 2412 && freq <= 2472) { | |
1465 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1466 | return false; | |
1467 | ||
1468 | /* 2.407 GHz, channels 1..13 */ | |
1469 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1470 | if (freq > chandef->chan->center_freq) | |
1471 | *op_class = 83; /* HT40+ */ | |
1472 | else | |
1473 | *op_class = 84; /* HT40- */ | |
1474 | } else { | |
1475 | *op_class = 81; | |
1476 | } | |
1477 | ||
1478 | return true; | |
1479 | } | |
1480 | ||
1481 | if (freq == 2484) { | |
1482 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1483 | return false; | |
1484 | ||
1485 | *op_class = 82; /* channel 14 */ | |
1486 | return true; | |
1487 | } | |
1488 | ||
1489 | switch (chandef->width) { | |
1490 | case NL80211_CHAN_WIDTH_80: | |
1491 | vht_opclass = 128; | |
1492 | break; | |
1493 | case NL80211_CHAN_WIDTH_160: | |
1494 | vht_opclass = 129; | |
1495 | break; | |
1496 | case NL80211_CHAN_WIDTH_80P80: | |
1497 | vht_opclass = 130; | |
1498 | break; | |
1499 | case NL80211_CHAN_WIDTH_10: | |
1500 | case NL80211_CHAN_WIDTH_5: | |
1501 | return false; /* unsupported for now */ | |
1502 | default: | |
1503 | vht_opclass = 0; | |
1504 | break; | |
1505 | } | |
1506 | ||
1507 | /* 5 GHz, channels 36..48 */ | |
1508 | if (freq >= 5180 && freq <= 5240) { | |
1509 | if (vht_opclass) { | |
1510 | *op_class = vht_opclass; | |
1511 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1512 | if (freq > chandef->chan->center_freq) | |
1513 | *op_class = 116; | |
1514 | else | |
1515 | *op_class = 117; | |
1516 | } else { | |
1517 | *op_class = 115; | |
1518 | } | |
1519 | ||
1520 | return true; | |
1521 | } | |
1522 | ||
1523 | /* 5 GHz, channels 52..64 */ | |
1524 | if (freq >= 5260 && freq <= 5320) { | |
1525 | if (vht_opclass) { | |
1526 | *op_class = vht_opclass; | |
1527 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1528 | if (freq > chandef->chan->center_freq) | |
1529 | *op_class = 119; | |
1530 | else | |
1531 | *op_class = 120; | |
1532 | } else { | |
1533 | *op_class = 118; | |
1534 | } | |
1535 | ||
1536 | return true; | |
1537 | } | |
1538 | ||
1539 | /* 5 GHz, channels 100..144 */ | |
1540 | if (freq >= 5500 && freq <= 5720) { | |
1541 | if (vht_opclass) { | |
1542 | *op_class = vht_opclass; | |
1543 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1544 | if (freq > chandef->chan->center_freq) | |
1545 | *op_class = 122; | |
1546 | else | |
1547 | *op_class = 123; | |
1548 | } else { | |
1549 | *op_class = 121; | |
1550 | } | |
1551 | ||
1552 | return true; | |
1553 | } | |
1554 | ||
1555 | /* 5 GHz, channels 149..169 */ | |
1556 | if (freq >= 5745 && freq <= 5845) { | |
1557 | if (vht_opclass) { | |
1558 | *op_class = vht_opclass; | |
1559 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1560 | if (freq > chandef->chan->center_freq) | |
1561 | *op_class = 126; | |
1562 | else | |
1563 | *op_class = 127; | |
1564 | } else if (freq <= 5805) { | |
1565 | *op_class = 124; | |
1566 | } else { | |
1567 | *op_class = 125; | |
1568 | } | |
1569 | ||
1570 | return true; | |
1571 | } | |
1572 | ||
1573 | /* 56.16 GHz, channel 1..4 */ | |
9cf0a0b4 | 1574 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { |
a38700dd AN |
1575 | if (chandef->width >= NL80211_CHAN_WIDTH_40) |
1576 | return false; | |
1577 | ||
1578 | *op_class = 180; | |
1579 | return true; | |
1580 | } | |
1581 | ||
1582 | /* not supported yet */ | |
1583 | return false; | |
1584 | } | |
1585 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1586 | ||
4c8dea63 JB |
1587 | static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
1588 | u32 *beacon_int_gcd, | |
1589 | bool *beacon_int_different) | |
56d1893d JB |
1590 | { |
1591 | struct wireless_dev *wdev; | |
56d1893d | 1592 | |
4c8dea63 JB |
1593 | *beacon_int_gcd = 0; |
1594 | *beacon_int_different = false; | |
56d1893d | 1595 | |
4c8dea63 | 1596 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
56d1893d JB |
1597 | if (!wdev->beacon_interval) |
1598 | continue; | |
0c317a02 | 1599 | |
4c8dea63 JB |
1600 | if (!*beacon_int_gcd) { |
1601 | *beacon_int_gcd = wdev->beacon_interval; | |
0c317a02 | 1602 | continue; |
4c8dea63 | 1603 | } |
0c317a02 | 1604 | |
4c8dea63 | 1605 | if (wdev->beacon_interval == *beacon_int_gcd) |
0c317a02 PK |
1606 | continue; |
1607 | ||
4c8dea63 JB |
1608 | *beacon_int_different = true; |
1609 | *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); | |
1610 | } | |
0c317a02 | 1611 | |
4c8dea63 JB |
1612 | if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
1613 | if (*beacon_int_gcd) | |
1614 | *beacon_int_different = true; | |
1615 | *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); | |
56d1893d | 1616 | } |
4c8dea63 | 1617 | } |
56d1893d | 1618 | |
4c8dea63 JB |
1619 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1620 | enum nl80211_iftype iftype, u32 beacon_int) | |
1621 | { | |
1622 | /* | |
1623 | * This is just a basic pre-condition check; if interface combinations | |
1624 | * are possible the driver must already be checking those with a call | |
1625 | * to cfg80211_check_combinations(), in which case we'll validate more | |
1626 | * through the cfg80211_calculate_bi_data() call and code in | |
1627 | * cfg80211_iter_combinations(). | |
1628 | */ | |
1629 | ||
1630 | if (beacon_int < 10 || beacon_int > 10000) | |
1631 | return -EINVAL; | |
1632 | ||
1633 | return 0; | |
56d1893d | 1634 | } |
7527a782 | 1635 | |
65a124dd | 1636 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
e227300c | 1637 | struct iface_combination_params *params, |
65a124dd MK |
1638 | void (*iter)(const struct ieee80211_iface_combination *c, |
1639 | void *data), | |
1640 | void *data) | |
cb2d956d | 1641 | { |
8c48b50a FF |
1642 | const struct ieee80211_regdomain *regdom; |
1643 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1644 | int i, j, iftype; |
1645 | int num_interfaces = 0; | |
1646 | u32 used_iftypes = 0; | |
4c8dea63 JB |
1647 | u32 beacon_int_gcd; |
1648 | bool beacon_int_different; | |
1649 | ||
1650 | /* | |
1651 | * This is a bit strange, since the iteration used to rely only on | |
1652 | * the data given by the driver, but here it now relies on context, | |
1653 | * in form of the currently operating interfaces. | |
1654 | * This is OK for all current users, and saves us from having to | |
1655 | * push the GCD calculations into all the drivers. | |
1656 | * In the future, this should probably rely more on data that's in | |
1657 | * cfg80211 already - the only thing not would appear to be any new | |
1658 | * interfaces (while being brought up) and channel/radar data. | |
1659 | */ | |
1660 | cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, | |
1661 | &beacon_int_gcd, &beacon_int_different); | |
cb2d956d | 1662 | |
e227300c | 1663 | if (params->radar_detect) { |
8c48b50a FF |
1664 | rcu_read_lock(); |
1665 | regdom = rcu_dereference(cfg80211_regdomain); | |
1666 | if (regdom) | |
1667 | region = regdom->dfs_region; | |
1668 | rcu_read_unlock(); | |
1669 | } | |
1670 | ||
cb2d956d | 1671 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
e227300c PK |
1672 | num_interfaces += params->iftype_num[iftype]; |
1673 | if (params->iftype_num[iftype] > 0 && | |
cb2d956d LC |
1674 | !(wiphy->software_iftypes & BIT(iftype))) |
1675 | used_iftypes |= BIT(iftype); | |
1676 | } | |
1677 | ||
1678 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1679 | const struct ieee80211_iface_combination *c; | |
1680 | struct ieee80211_iface_limit *limits; | |
1681 | u32 all_iftypes = 0; | |
1682 | ||
1683 | c = &wiphy->iface_combinations[i]; | |
1684 | ||
1685 | if (num_interfaces > c->max_interfaces) | |
1686 | continue; | |
e227300c | 1687 | if (params->num_different_channels > c->num_different_channels) |
cb2d956d LC |
1688 | continue; |
1689 | ||
1690 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1691 | GFP_KERNEL); | |
1692 | if (!limits) | |
1693 | return -ENOMEM; | |
1694 | ||
1695 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1696 | if (wiphy->software_iftypes & BIT(iftype)) | |
1697 | continue; | |
1698 | for (j = 0; j < c->n_limits; j++) { | |
1699 | all_iftypes |= limits[j].types; | |
1700 | if (!(limits[j].types & BIT(iftype))) | |
1701 | continue; | |
e227300c | 1702 | if (limits[j].max < params->iftype_num[iftype]) |
cb2d956d | 1703 | goto cont; |
e227300c | 1704 | limits[j].max -= params->iftype_num[iftype]; |
cb2d956d LC |
1705 | } |
1706 | } | |
1707 | ||
e227300c PK |
1708 | if (params->radar_detect != |
1709 | (c->radar_detect_widths & params->radar_detect)) | |
cb2d956d LC |
1710 | goto cont; |
1711 | ||
e227300c | 1712 | if (params->radar_detect && c->radar_detect_regions && |
8c48b50a FF |
1713 | !(c->radar_detect_regions & BIT(region))) |
1714 | goto cont; | |
1715 | ||
cb2d956d LC |
1716 | /* Finally check that all iftypes that we're currently |
1717 | * using are actually part of this combination. If they | |
1718 | * aren't then we can't use this combination and have | |
1719 | * to continue to the next. | |
1720 | */ | |
1721 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1722 | goto cont; | |
1723 | ||
4c8dea63 | 1724 | if (beacon_int_gcd) { |
0c317a02 | 1725 | if (c->beacon_int_min_gcd && |
4c8dea63 | 1726 | beacon_int_gcd < c->beacon_int_min_gcd) |
0507a3ac | 1727 | goto cont; |
4c8dea63 | 1728 | if (!c->beacon_int_min_gcd && beacon_int_different) |
0c317a02 PK |
1729 | goto cont; |
1730 | } | |
1731 | ||
cb2d956d LC |
1732 | /* This combination covered all interface types and |
1733 | * supported the requested numbers, so we're good. | |
1734 | */ | |
65a124dd MK |
1735 | |
1736 | (*iter)(c, data); | |
cb2d956d LC |
1737 | cont: |
1738 | kfree(limits); | |
1739 | } | |
1740 | ||
65a124dd MK |
1741 | return 0; |
1742 | } | |
1743 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1744 | ||
1745 | static void | |
1746 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1747 | void *data) | |
1748 | { | |
1749 | int *num = data; | |
1750 | (*num)++; | |
1751 | } | |
1752 | ||
1753 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
e227300c | 1754 | struct iface_combination_params *params) |
65a124dd MK |
1755 | { |
1756 | int err, num = 0; | |
1757 | ||
e227300c | 1758 | err = cfg80211_iter_combinations(wiphy, params, |
65a124dd MK |
1759 | cfg80211_iter_sum_ifcombs, &num); |
1760 | if (err) | |
1761 | return err; | |
1762 | if (num == 0) | |
1763 | return -EBUSY; | |
1764 | ||
1765 | return 0; | |
cb2d956d LC |
1766 | } |
1767 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1768 | ||
34850ab2 JB |
1769 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1770 | const u8 *rates, unsigned int n_rates, | |
1771 | u32 *mask) | |
1772 | { | |
1773 | int i, j; | |
1774 | ||
a401d2bb JB |
1775 | if (!sband) |
1776 | return -EINVAL; | |
1777 | ||
34850ab2 JB |
1778 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1779 | return -EINVAL; | |
1780 | ||
1781 | *mask = 0; | |
1782 | ||
1783 | for (i = 0; i < n_rates; i++) { | |
1784 | int rate = (rates[i] & 0x7f) * 5; | |
1785 | bool found = false; | |
1786 | ||
1787 | for (j = 0; j < sband->n_bitrates; j++) { | |
1788 | if (sband->bitrates[j].bitrate == rate) { | |
1789 | found = true; | |
1790 | *mask |= BIT(j); | |
1791 | break; | |
1792 | } | |
1793 | } | |
1794 | if (!found) | |
1795 | return -EINVAL; | |
1796 | } | |
1797 | ||
1798 | /* | |
1799 | * mask must have at least one bit set here since we | |
1800 | * didn't accept a 0-length rates array nor allowed | |
1801 | * entries in the array that didn't exist | |
1802 | */ | |
1803 | ||
1804 | return 0; | |
1805 | } | |
11a2a357 | 1806 | |
bdfbec2d IP |
1807 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1808 | { | |
57fbcce3 | 1809 | enum nl80211_band band; |
bdfbec2d IP |
1810 | unsigned int n_channels = 0; |
1811 | ||
57fbcce3 | 1812 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1813 | if (wiphy->bands[band]) |
1814 | n_channels += wiphy->bands[band]->n_channels; | |
1815 | ||
1816 | return n_channels; | |
1817 | } | |
1818 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1819 | ||
7406353d AQ |
1820 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1821 | struct station_info *sinfo) | |
1822 | { | |
1823 | struct cfg80211_registered_device *rdev; | |
1824 | struct wireless_dev *wdev; | |
1825 | ||
1826 | wdev = dev->ieee80211_ptr; | |
1827 | if (!wdev) | |
1828 | return -EOPNOTSUPP; | |
1829 | ||
1830 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1831 | if (!rdev->ops->get_station) | |
1832 | return -EOPNOTSUPP; | |
1833 | ||
3c12d048 SE |
1834 | memset(sinfo, 0, sizeof(*sinfo)); |
1835 | ||
7406353d AQ |
1836 | return rdev_get_station(rdev, dev, mac_addr, sinfo); |
1837 | } | |
1838 | EXPORT_SYMBOL(cfg80211_get_station); | |
1839 | ||
a442b761 AB |
1840 | void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
1841 | { | |
1842 | int i; | |
1843 | ||
1844 | if (!f) | |
1845 | return; | |
1846 | ||
1847 | kfree(f->serv_spec_info); | |
1848 | kfree(f->srf_bf); | |
1849 | kfree(f->srf_macs); | |
1850 | for (i = 0; i < f->num_rx_filters; i++) | |
1851 | kfree(f->rx_filters[i].filter); | |
1852 | ||
1853 | for (i = 0; i < f->num_tx_filters; i++) | |
1854 | kfree(f->tx_filters[i].filter); | |
1855 | ||
1856 | kfree(f->rx_filters); | |
1857 | kfree(f->tx_filters); | |
1858 | kfree(f); | |
1859 | } | |
1860 | EXPORT_SYMBOL(cfg80211_free_nan_func); | |
1861 | ||
4787cfa0 RM |
1862 | bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
1863 | u32 center_freq_khz, u32 bw_khz) | |
1864 | { | |
1865 | u32 start_freq_khz, end_freq_khz; | |
1866 | ||
1867 | start_freq_khz = center_freq_khz - (bw_khz / 2); | |
1868 | end_freq_khz = center_freq_khz + (bw_khz / 2); | |
1869 | ||
1870 | if (start_freq_khz >= freq_range->start_freq_khz && | |
1871 | end_freq_khz <= freq_range->end_freq_khz) | |
1872 | return true; | |
1873 | ||
1874 | return false; | |
1875 | } | |
1876 | ||
8689c051 AS |
1877 | int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) |
1878 | { | |
1d211d43 JB |
1879 | sinfo->pertid = kcalloc(IEEE80211_NUM_TIDS + 1, |
1880 | sizeof(*(sinfo->pertid)), | |
1881 | gfp); | |
8689c051 AS |
1882 | if (!sinfo->pertid) |
1883 | return -ENOMEM; | |
1884 | ||
1885 | return 0; | |
1886 | } | |
1887 | EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); | |
1888 | ||
11a2a357 JB |
1889 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1890 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1891 | const unsigned char rfc1042_header[] __aligned(2) = | |
1892 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1893 | EXPORT_SYMBOL(rfc1042_header); | |
1894 | ||
1895 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1896 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1897 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1898 | EXPORT_SYMBOL(bridge_tunnel_header); | |
30ca1aa5 DL |
1899 | |
1900 | /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ | |
1901 | struct iapp_layer2_update { | |
1902 | u8 da[ETH_ALEN]; /* broadcast */ | |
1903 | u8 sa[ETH_ALEN]; /* STA addr */ | |
1904 | __be16 len; /* 6 */ | |
1905 | u8 dsap; /* 0 */ | |
1906 | u8 ssap; /* 0 */ | |
1907 | u8 control; | |
1908 | u8 xid_info[3]; | |
1909 | } __packed; | |
1910 | ||
1911 | void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) | |
1912 | { | |
1913 | struct iapp_layer2_update *msg; | |
1914 | struct sk_buff *skb; | |
1915 | ||
1916 | /* Send Level 2 Update Frame to update forwarding tables in layer 2 | |
1917 | * bridge devices */ | |
1918 | ||
1919 | skb = dev_alloc_skb(sizeof(*msg)); | |
1920 | if (!skb) | |
1921 | return; | |
1922 | msg = skb_put(skb, sizeof(*msg)); | |
1923 | ||
1924 | /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) | |
1925 | * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ | |
1926 | ||
1927 | eth_broadcast_addr(msg->da); | |
1928 | ether_addr_copy(msg->sa, addr); | |
1929 | msg->len = htons(6); | |
1930 | msg->dsap = 0; | |
1931 | msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ | |
1932 | msg->control = 0xaf; /* XID response lsb.1111F101. | |
1933 | * F=0 (no poll command; unsolicited frame) */ | |
1934 | msg->xid_info[0] = 0x81; /* XID format identifier */ | |
1935 | msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ | |
1936 | msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ | |
1937 | ||
1938 | skb->dev = dev; | |
1939 | skb->protocol = eth_type_trans(skb, dev); | |
1940 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1941 | netif_rx_ni(skb); | |
1942 | } | |
1943 | EXPORT_SYMBOL(cfg80211_send_layer2_update); | |
b0aa75f0 JB |
1944 | |
1945 | int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, | |
1946 | enum ieee80211_vht_chanwidth bw, | |
1947 | int mcs, bool ext_nss_bw_capable) | |
1948 | { | |
1949 | u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); | |
1950 | int max_vht_nss = 0; | |
1951 | int ext_nss_bw; | |
1952 | int supp_width; | |
1953 | int i, mcs_encoding; | |
1954 | ||
1955 | if (map == 0xffff) | |
1956 | return 0; | |
1957 | ||
1958 | if (WARN_ON(mcs > 9)) | |
1959 | return 0; | |
1960 | if (mcs <= 7) | |
1961 | mcs_encoding = 0; | |
1962 | else if (mcs == 8) | |
1963 | mcs_encoding = 1; | |
1964 | else | |
1965 | mcs_encoding = 2; | |
1966 | ||
1967 | /* find max_vht_nss for the given MCS */ | |
1968 | for (i = 7; i >= 0; i--) { | |
1969 | int supp = (map >> (2 * i)) & 3; | |
1970 | ||
1971 | if (supp == 3) | |
1972 | continue; | |
1973 | ||
1974 | if (supp >= mcs_encoding) { | |
1975 | max_vht_nss = i; | |
1976 | break; | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | if (!(cap->supp_mcs.tx_mcs_map & | |
1981 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) | |
1982 | return max_vht_nss; | |
1983 | ||
1984 | ext_nss_bw = le32_get_bits(cap->vht_cap_info, | |
1985 | IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); | |
1986 | supp_width = le32_get_bits(cap->vht_cap_info, | |
1987 | IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); | |
1988 | ||
1989 | /* if not capable, treat ext_nss_bw as 0 */ | |
1990 | if (!ext_nss_bw_capable) | |
1991 | ext_nss_bw = 0; | |
1992 | ||
1993 | /* This is invalid */ | |
1994 | if (supp_width == 3) | |
1995 | return 0; | |
1996 | ||
1997 | /* This is an invalid combination so pretend nothing is supported */ | |
1998 | if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
1999 | return 0; | |
2000 | ||
2001 | /* | |
2002 | * Cover all the special cases according to IEEE 802.11-2016 | |
2003 | * Table 9-250. All other cases are either factor of 1 or not | |
2004 | * valid/supported. | |
2005 | */ | |
2006 | switch (bw) { | |
2007 | case IEEE80211_VHT_CHANWIDTH_USE_HT: | |
2008 | case IEEE80211_VHT_CHANWIDTH_80MHZ: | |
2009 | if ((supp_width == 1 || supp_width == 2) && | |
2010 | ext_nss_bw == 3) | |
2011 | return 2 * max_vht_nss; | |
2012 | break; | |
2013 | case IEEE80211_VHT_CHANWIDTH_160MHZ: | |
2014 | if (supp_width == 0 && | |
2015 | (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
2016 | return DIV_ROUND_UP(max_vht_nss, 2); | |
2017 | if (supp_width == 0 && | |
2018 | ext_nss_bw == 3) | |
2019 | return DIV_ROUND_UP(3 * max_vht_nss, 4); | |
2020 | if (supp_width == 1 && | |
2021 | ext_nss_bw == 3) | |
2022 | return 2 * max_vht_nss; | |
2023 | break; | |
2024 | case IEEE80211_VHT_CHANWIDTH_80P80MHZ: | |
2025 | if (supp_width == 0 && | |
2026 | (ext_nss_bw == 1 || ext_nss_bw == 2)) | |
2027 | return 0; /* not possible */ | |
2028 | if (supp_width == 0 && | |
2029 | ext_nss_bw == 2) | |
2030 | return DIV_ROUND_UP(max_vht_nss, 2); | |
2031 | if (supp_width == 0 && | |
2032 | ext_nss_bw == 3) | |
2033 | return DIV_ROUND_UP(3 * max_vht_nss, 4); | |
2034 | if (supp_width == 1 && | |
2035 | ext_nss_bw == 0) | |
2036 | return 0; /* not possible */ | |
2037 | if (supp_width == 1 && | |
2038 | ext_nss_bw == 1) | |
2039 | return DIV_ROUND_UP(max_vht_nss, 2); | |
2040 | if (supp_width == 1 && | |
2041 | ext_nss_bw == 2) | |
2042 | return DIV_ROUND_UP(3 * max_vht_nss, 4); | |
2043 | break; | |
2044 | } | |
2045 | ||
2046 | /* not covered or invalid combination received */ | |
2047 | return max_vht_nss; | |
2048 | } | |
2049 | EXPORT_SYMBOL(ieee80211_get_vht_max_nss); |