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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 |
8318d78a | 7 | */ |
bc3b2d7f | 8 | #include <linux/export.h> |
d3236553 | 9 | #include <linux/bitops.h> |
e31a16d6 | 10 | #include <linux/etherdevice.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
d3236553 | 12 | #include <net/cfg80211.h> |
e31a16d6 | 13 | #include <net/ip.h> |
b156579b | 14 | #include <net/dsfield.h> |
c6ca5e28 | 15 | #include <linux/if_vlan.h> |
960d97f9 | 16 | #include <linux/mpls.h> |
4c8dea63 | 17 | #include <linux/gcd.h> |
8318d78a | 18 | #include "core.h" |
e35e4d28 HG |
19 | #include "rdev-ops.h" |
20 | ||
8318d78a | 21 | |
bd815252 JB |
22 | struct ieee80211_rate * |
23 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 24 | u32 basic_rates, int bitrate) |
bd815252 JB |
25 | { |
26 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
27 | int i; | |
28 | ||
29 | for (i = 0; i < sband->n_bitrates; i++) { | |
30 | if (!(basic_rates & BIT(i))) | |
31 | continue; | |
32 | if (sband->bitrates[i].bitrate > bitrate) | |
33 | continue; | |
34 | result = &sband->bitrates[i]; | |
35 | } | |
36 | ||
37 | return result; | |
38 | } | |
39 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
40 | ||
74608aca SW |
41 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
42 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
43 | { |
44 | struct ieee80211_rate *bitrates; | |
45 | u32 mandatory_rates = 0; | |
46 | enum ieee80211_rate_flags mandatory_flag; | |
47 | int i; | |
48 | ||
49 | if (WARN_ON(!sband)) | |
50 | return 1; | |
51 | ||
57fbcce3 | 52 | if (sband->band == NL80211_BAND_2GHZ) { |
74608aca SW |
53 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
54 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
55 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
56 | else | |
57 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
58 | } else { | |
b422c6cd | 59 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 60 | } |
b422c6cd AN |
61 | |
62 | bitrates = sband->bitrates; | |
63 | for (i = 0; i < sband->n_bitrates; i++) | |
64 | if (bitrates[i].flags & mandatory_flag) | |
65 | mandatory_rates |= BIT(i); | |
66 | return mandatory_rates; | |
67 | } | |
68 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
69 | ||
57fbcce3 | 70 | int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) |
8318d78a | 71 | { |
59eb21a6 BR |
72 | /* see 802.11 17.3.8.3.2 and Annex J |
73 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
74 | if (chan <= 0) |
75 | return 0; /* not supported */ | |
76 | switch (band) { | |
57fbcce3 | 77 | case NL80211_BAND_2GHZ: |
59eb21a6 BR |
78 | if (chan == 14) |
79 | return 2484; | |
80 | else if (chan < 14) | |
81 | return 2407 + chan * 5; | |
3a0c52a6 | 82 | break; |
57fbcce3 | 83 | case NL80211_BAND_5GHZ: |
3a0c52a6 VK |
84 | if (chan >= 182 && chan <= 196) |
85 | return 4000 + chan * 5; | |
59eb21a6 | 86 | else |
3a0c52a6 VK |
87 | return 5000 + chan * 5; |
88 | break; | |
57fbcce3 | 89 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
90 | if (chan < 5) |
91 | return 56160 + chan * 2160; | |
92 | break; | |
93 | default: | |
94 | ; | |
59eb21a6 | 95 | } |
3a0c52a6 | 96 | return 0; /* not supported */ |
8318d78a JB |
97 | } |
98 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
99 | ||
100 | int ieee80211_frequency_to_channel(int freq) | |
101 | { | |
59eb21a6 | 102 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
103 | if (freq == 2484) |
104 | return 14; | |
59eb21a6 | 105 | else if (freq < 2484) |
8318d78a | 106 | return (freq - 2407) / 5; |
59eb21a6 BR |
107 | else if (freq >= 4910 && freq <= 4980) |
108 | return (freq - 4000) / 5; | |
3a0c52a6 | 109 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 110 | return (freq - 5000) / 5; |
3a0c52a6 VK |
111 | else if (freq >= 58320 && freq <= 64800) |
112 | return (freq - 56160) / 2160; | |
113 | else | |
114 | return 0; | |
8318d78a JB |
115 | } |
116 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
117 | ||
543b921b | 118 | struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy, int freq) |
906c730a | 119 | { |
57fbcce3 | 120 | enum nl80211_band band; |
906c730a JB |
121 | struct ieee80211_supported_band *sband; |
122 | int i; | |
123 | ||
57fbcce3 | 124 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
125 | sband = wiphy->bands[band]; |
126 | ||
127 | if (!sband) | |
128 | continue; | |
129 | ||
130 | for (i = 0; i < sband->n_channels; i++) { | |
131 | if (sband->channels[i].center_freq == freq) | |
132 | return &sband->channels[i]; | |
133 | } | |
134 | } | |
135 | ||
136 | return NULL; | |
137 | } | |
543b921b | 138 | EXPORT_SYMBOL(ieee80211_get_channel); |
906c730a | 139 | |
343884c8 | 140 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) |
8318d78a JB |
141 | { |
142 | int i, want; | |
143 | ||
343884c8 | 144 | switch (sband->band) { |
57fbcce3 | 145 | case NL80211_BAND_5GHZ: |
8318d78a JB |
146 | want = 3; |
147 | for (i = 0; i < sband->n_bitrates; i++) { | |
148 | if (sband->bitrates[i].bitrate == 60 || | |
149 | sband->bitrates[i].bitrate == 120 || | |
150 | sband->bitrates[i].bitrate == 240) { | |
151 | sband->bitrates[i].flags |= | |
152 | IEEE80211_RATE_MANDATORY_A; | |
153 | want--; | |
154 | } | |
155 | } | |
156 | WARN_ON(want); | |
157 | break; | |
57fbcce3 | 158 | case NL80211_BAND_2GHZ: |
8318d78a JB |
159 | want = 7; |
160 | for (i = 0; i < sband->n_bitrates; i++) { | |
161 | if (sband->bitrates[i].bitrate == 10) { | |
162 | sband->bitrates[i].flags |= | |
163 | IEEE80211_RATE_MANDATORY_B | | |
164 | IEEE80211_RATE_MANDATORY_G; | |
165 | want--; | |
166 | } | |
167 | ||
168 | if (sband->bitrates[i].bitrate == 20 || | |
169 | sband->bitrates[i].bitrate == 55 || | |
170 | sband->bitrates[i].bitrate == 110 || | |
171 | sband->bitrates[i].bitrate == 60 || | |
172 | sband->bitrates[i].bitrate == 120 || | |
173 | sband->bitrates[i].bitrate == 240) { | |
174 | sband->bitrates[i].flags |= | |
175 | IEEE80211_RATE_MANDATORY_G; | |
176 | want--; | |
177 | } | |
178 | ||
aac09fbf JB |
179 | if (sband->bitrates[i].bitrate != 10 && |
180 | sband->bitrates[i].bitrate != 20 && | |
181 | sband->bitrates[i].bitrate != 55 && | |
182 | sband->bitrates[i].bitrate != 110) | |
8318d78a JB |
183 | sband->bitrates[i].flags |= |
184 | IEEE80211_RATE_ERP_G; | |
185 | } | |
406f2388 | 186 | WARN_ON(want != 0 && want != 3 && want != 6); |
8318d78a | 187 | break; |
57fbcce3 | 188 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
189 | /* check for mandatory HT MCS 1..4 */ |
190 | WARN_ON(!sband->ht_cap.ht_supported); | |
191 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
192 | break; | |
57fbcce3 | 193 | case NUM_NL80211_BANDS: |
343884c8 | 194 | default: |
8318d78a JB |
195 | WARN_ON(1); |
196 | break; | |
197 | } | |
198 | } | |
199 | ||
200 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
201 | { | |
57fbcce3 | 202 | enum nl80211_band band; |
8318d78a | 203 | |
57fbcce3 | 204 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a | 205 | if (wiphy->bands[band]) |
343884c8 | 206 | set_mandatory_flags_band(wiphy->bands[band]); |
8318d78a | 207 | } |
08645126 | 208 | |
38ba3c57 JM |
209 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
210 | { | |
211 | int i; | |
212 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
213 | if (cipher == wiphy->cipher_suites[i]) | |
214 | return true; | |
215 | return false; | |
216 | } | |
217 | ||
fffd0934 JB |
218 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
219 | struct key_params *params, int key_idx, | |
e31b8213 | 220 | bool pairwise, const u8 *mac_addr) |
08645126 | 221 | { |
e9c8f8d3 | 222 | if (key_idx < 0 || key_idx > 5) |
08645126 JB |
223 | return -EINVAL; |
224 | ||
e31b8213 JB |
225 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
226 | return -EINVAL; | |
227 | ||
228 | if (pairwise && !mac_addr) | |
229 | return -EINVAL; | |
230 | ||
37720569 JM |
231 | switch (params->cipher) { |
232 | case WLAN_CIPHER_SUITE_TKIP: | |
233 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
234 | case WLAN_CIPHER_SUITE_CCMP_256: |
235 | case WLAN_CIPHER_SUITE_GCMP: | |
236 | case WLAN_CIPHER_SUITE_GCMP_256: | |
37720569 JM |
237 | /* Disallow pairwise keys with non-zero index unless it's WEP |
238 | * or a vendor specific cipher (because current deployments use | |
239 | * pairwise WEP keys with non-zero indices and for vendor | |
240 | * specific ciphers this should be validated in the driver or | |
241 | * hardware level - but 802.11i clearly specifies to use zero) | |
242 | */ | |
243 | if (pairwise && key_idx) | |
244 | return -EINVAL; | |
245 | break; | |
246 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
247 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
248 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
249 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
250 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
251 | if (pairwise) | |
252 | return -EINVAL; | |
e9c8f8d3 JB |
253 | if (key_idx < 4) |
254 | return -EINVAL; | |
37720569 | 255 | break; |
e9c8f8d3 JB |
256 | case WLAN_CIPHER_SUITE_WEP40: |
257 | case WLAN_CIPHER_SUITE_WEP104: | |
258 | if (key_idx > 3) | |
259 | return -EINVAL; | |
37720569 JM |
260 | default: |
261 | break; | |
262 | } | |
08645126 | 263 | |
08645126 JB |
264 | switch (params->cipher) { |
265 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 266 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
267 | return -EINVAL; |
268 | break; | |
269 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 270 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
271 | return -EINVAL; |
272 | break; | |
273 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 274 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
275 | return -EINVAL; |
276 | break; | |
cfcf1682 JM |
277 | case WLAN_CIPHER_SUITE_CCMP_256: |
278 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
279 | return -EINVAL; | |
280 | break; | |
281 | case WLAN_CIPHER_SUITE_GCMP: | |
282 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
283 | return -EINVAL; | |
284 | break; | |
285 | case WLAN_CIPHER_SUITE_GCMP_256: | |
286 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
287 | return -EINVAL; | |
288 | break; | |
08645126 | 289 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 290 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
291 | return -EINVAL; |
292 | break; | |
293 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 294 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
295 | return -EINVAL; |
296 | break; | |
cfcf1682 JM |
297 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
298 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
299 | return -EINVAL; | |
300 | break; | |
301 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
302 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
303 | return -EINVAL; | |
304 | break; | |
305 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
306 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
307 | return -EINVAL; | |
308 | break; | |
08645126 | 309 | default: |
7d64b7cc JB |
310 | /* |
311 | * We don't know anything about this algorithm, | |
312 | * allow using it -- but the driver must check | |
313 | * all parameters! We still check below whether | |
314 | * or not the driver supports this algorithm, | |
315 | * of course. | |
316 | */ | |
317 | break; | |
08645126 JB |
318 | } |
319 | ||
9f26a952 JM |
320 | if (params->seq) { |
321 | switch (params->cipher) { | |
322 | case WLAN_CIPHER_SUITE_WEP40: | |
323 | case WLAN_CIPHER_SUITE_WEP104: | |
324 | /* These ciphers do not use key sequence */ | |
325 | return -EINVAL; | |
326 | case WLAN_CIPHER_SUITE_TKIP: | |
327 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
328 | case WLAN_CIPHER_SUITE_CCMP_256: |
329 | case WLAN_CIPHER_SUITE_GCMP: | |
330 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 331 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
332 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
333 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
334 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
335 | if (params->seq_len != 6) |
336 | return -EINVAL; | |
337 | break; | |
338 | } | |
339 | } | |
340 | ||
38ba3c57 | 341 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
342 | return -EINVAL; |
343 | ||
08645126 JB |
344 | return 0; |
345 | } | |
e31a16d6 | 346 | |
633adf1a | 347 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
348 | { |
349 | unsigned int hdrlen = 24; | |
350 | ||
351 | if (ieee80211_is_data(fc)) { | |
352 | if (ieee80211_has_a4(fc)) | |
353 | hdrlen = 30; | |
d0dd2de0 | 354 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 355 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
356 | if (ieee80211_has_order(fc)) |
357 | hdrlen += IEEE80211_HT_CTL_LEN; | |
358 | } | |
e31a16d6 ZY |
359 | goto out; |
360 | } | |
361 | ||
fb142f4b FC |
362 | if (ieee80211_is_mgmt(fc)) { |
363 | if (ieee80211_has_order(fc)) | |
364 | hdrlen += IEEE80211_HT_CTL_LEN; | |
365 | goto out; | |
366 | } | |
367 | ||
e31a16d6 ZY |
368 | if (ieee80211_is_ctl(fc)) { |
369 | /* | |
370 | * ACK and CTS are 10 bytes, all others 16. To see how | |
371 | * to get this condition consider | |
372 | * subtype mask: 0b0000000011110000 (0x00F0) | |
373 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
374 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
375 | * bits that matter: ^^^ (0x00E0) | |
376 | * value of those: 0b0000000011000000 (0x00C0) | |
377 | */ | |
378 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
379 | hdrlen = 10; | |
380 | else | |
381 | hdrlen = 16; | |
382 | } | |
383 | out: | |
384 | return hdrlen; | |
385 | } | |
386 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
387 | ||
388 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
389 | { | |
390 | const struct ieee80211_hdr *hdr = | |
391 | (const struct ieee80211_hdr *)skb->data; | |
392 | unsigned int hdrlen; | |
393 | ||
394 | if (unlikely(skb->len < 10)) | |
395 | return 0; | |
396 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
397 | if (unlikely(hdrlen > skb->len)) | |
398 | return 0; | |
399 | return hdrlen; | |
400 | } | |
401 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
402 | ||
2d1c304c | 403 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 404 | { |
2d1c304c | 405 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 406 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 407 | switch (ae) { |
7dd111e8 | 408 | default: |
e31a16d6 ZY |
409 | case 0: |
410 | return 6; | |
3c5772a5 | 411 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 412 | return 12; |
3c5772a5 | 413 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 414 | return 18; |
e31a16d6 ZY |
415 | } |
416 | } | |
2d1c304c FF |
417 | |
418 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
419 | { | |
420 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
421 | } | |
9b395bc3 | 422 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 423 | |
7f6990c8 JB |
424 | int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, |
425 | const u8 *addr, enum nl80211_iftype iftype) | |
e31a16d6 ZY |
426 | { |
427 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
428 | struct { |
429 | u8 hdr[ETH_ALEN] __aligned(2); | |
430 | __be16 proto; | |
431 | } payload; | |
432 | struct ethhdr tmp; | |
433 | u16 hdrlen; | |
434 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
435 | |
436 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
437 | return -1; | |
438 | ||
439 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2d1c304c FF |
440 | if (skb->len < hdrlen + 8) |
441 | return -1; | |
e31a16d6 ZY |
442 | |
443 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
444 | * header | |
445 | * IEEE 802.11 address fields: | |
446 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
447 | * 0 0 DA SA BSSID n/a | |
448 | * 0 1 DA BSSID SA n/a | |
449 | * 1 0 BSSID SA DA n/a | |
450 | * 1 1 RA TA DA SA | |
451 | */ | |
2d1c304c FF |
452 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
453 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
454 | ||
455 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
456 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 | 457 | |
5667c86a RM |
458 | mesh_flags &= MESH_FLAGS_AE; |
459 | ||
e31a16d6 ZY |
460 | switch (hdr->frame_control & |
461 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
462 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
463 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
464 | iftype != NL80211_IFTYPE_AP_VLAN && |
465 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
466 | return -1; |
467 | break; | |
468 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
469 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
470 | iftype != NL80211_IFTYPE_MESH_POINT && |
471 | iftype != NL80211_IFTYPE_AP_VLAN && | |
472 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
473 | return -1; |
474 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
5667c86a | 475 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f | 476 | return -1; |
5667c86a | 477 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
478 | skb_copy_bits(skb, hdrlen + |
479 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 480 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 481 | } |
2d1c304c | 482 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
483 | } |
484 | break; | |
485 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 486 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
487 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
488 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
489 | (is_multicast_ether_addr(tmp.h_dest) && |
490 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 491 | return -1; |
3c5772a5 | 492 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
5667c86a | 493 | if (mesh_flags == MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 494 | return -1; |
5667c86a | 495 | if (mesh_flags == MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
496 | skb_copy_bits(skb, hdrlen + |
497 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
498 | tmp.h_source, ETH_ALEN); |
499 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 500 | } |
e31a16d6 ZY |
501 | break; |
502 | case cpu_to_le16(0): | |
941c93cd | 503 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
504 | iftype != NL80211_IFTYPE_STATION && |
505 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 506 | return -1; |
e31a16d6 ZY |
507 | break; |
508 | } | |
509 | ||
2d1c304c FF |
510 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
511 | tmp.h_proto = payload.proto; | |
e31a16d6 | 512 | |
2d1c304c FF |
513 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
514 | tmp.h_proto != htons(ETH_P_AARP) && | |
515 | tmp.h_proto != htons(ETH_P_IPX)) || | |
516 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
517 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
518 | * replace EtherType */ | |
2d1c304c FF |
519 | hdrlen += ETH_ALEN + 2; |
520 | else | |
c041778c | 521 | tmp.h_proto = htons(skb->len - hdrlen); |
2d1c304c FF |
522 | |
523 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 524 | |
2d1c304c | 525 | if (!ehdr) |
d58ff351 | 526 | ehdr = skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
527 | memcpy(ehdr, &tmp, sizeof(tmp)); |
528 | ||
e31a16d6 ZY |
529 | return 0; |
530 | } | |
7f6990c8 | 531 | EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); |
e31a16d6 | 532 | |
eaf85ca7 | 533 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
c1e5f471 JB |
534 | enum nl80211_iftype iftype, |
535 | const u8 *bssid, bool qos) | |
e31a16d6 ZY |
536 | { |
537 | struct ieee80211_hdr hdr; | |
538 | u16 hdrlen, ethertype; | |
539 | __le16 fc; | |
540 | const u8 *encaps_data; | |
541 | int encaps_len, skip_header_bytes; | |
542 | int nh_pos, h_pos; | |
543 | int head_need; | |
544 | ||
545 | if (unlikely(skb->len < ETH_HLEN)) | |
546 | return -EINVAL; | |
547 | ||
548 | nh_pos = skb_network_header(skb) - skb->data; | |
549 | h_pos = skb_transport_header(skb) - skb->data; | |
550 | ||
551 | /* convert Ethernet header to proper 802.11 header (based on | |
552 | * operation mode) */ | |
553 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
554 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
555 | ||
556 | switch (iftype) { | |
557 | case NL80211_IFTYPE_AP: | |
558 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 559 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
560 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
561 | /* DA BSSID SA */ | |
562 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
563 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
564 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
565 | hdrlen = 24; | |
566 | break; | |
567 | case NL80211_IFTYPE_STATION: | |
074ac8df | 568 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
569 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
570 | /* BSSID SA DA */ | |
571 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
572 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
573 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
574 | hdrlen = 24; | |
575 | break; | |
6e0bd6c3 | 576 | case NL80211_IFTYPE_OCB: |
e31a16d6 ZY |
577 | case NL80211_IFTYPE_ADHOC: |
578 | /* DA SA BSSID */ | |
579 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
580 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
581 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
582 | hdrlen = 24; | |
583 | break; | |
584 | default: | |
585 | return -EOPNOTSUPP; | |
586 | } | |
587 | ||
588 | if (qos) { | |
589 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
590 | hdrlen += 2; | |
591 | } | |
592 | ||
593 | hdr.frame_control = fc; | |
594 | hdr.duration_id = 0; | |
595 | hdr.seq_ctrl = 0; | |
596 | ||
597 | skip_header_bytes = ETH_HLEN; | |
598 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
599 | encaps_data = bridge_tunnel_header; | |
600 | encaps_len = sizeof(bridge_tunnel_header); | |
601 | skip_header_bytes -= 2; | |
e5c5d22e | 602 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e31a16d6 ZY |
603 | encaps_data = rfc1042_header; |
604 | encaps_len = sizeof(rfc1042_header); | |
605 | skip_header_bytes -= 2; | |
606 | } else { | |
607 | encaps_data = NULL; | |
608 | encaps_len = 0; | |
609 | } | |
610 | ||
611 | skb_pull(skb, skip_header_bytes); | |
612 | nh_pos -= skip_header_bytes; | |
613 | h_pos -= skip_header_bytes; | |
614 | ||
615 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
616 | ||
617 | if (head_need > 0 || skb_cloned(skb)) { | |
618 | head_need = max(head_need, 0); | |
619 | if (head_need) | |
620 | skb_orphan(skb); | |
621 | ||
24616152 | 622 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 623 | return -ENOMEM; |
e31a16d6 ZY |
624 | } |
625 | ||
626 | if (encaps_data) { | |
627 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
628 | nh_pos += encaps_len; | |
629 | h_pos += encaps_len; | |
630 | } | |
631 | ||
632 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
633 | ||
634 | nh_pos += hdrlen; | |
635 | h_pos += hdrlen; | |
636 | ||
637 | /* Update skb pointers to various headers since this modified frame | |
638 | * is going to go through Linux networking code that may potentially | |
639 | * need things like pointer to IP header. */ | |
3ef523ae | 640 | skb_reset_mac_header(skb); |
e31a16d6 ZY |
641 | skb_set_network_header(skb, nh_pos); |
642 | skb_set_transport_header(skb, h_pos); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
647 | ||
2b67f944 FF |
648 | static void |
649 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
650 | void *ptr, int len, int size) | |
651 | { | |
652 | struct skb_shared_info *sh = skb_shinfo(skb); | |
653 | int page_offset; | |
654 | ||
6d061f9f | 655 | page_ref_inc(page); |
2b67f944 FF |
656 | page_offset = ptr - page_address(page); |
657 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
658 | } | |
659 | ||
660 | static void | |
661 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
662 | int offset, int len) | |
663 | { | |
664 | struct skb_shared_info *sh = skb_shinfo(skb); | |
aa1702dd | 665 | const skb_frag_t *frag = &sh->frags[0]; |
2b67f944 FF |
666 | struct page *frag_page; |
667 | void *frag_ptr; | |
668 | int frag_len, frag_size; | |
669 | int head_size = skb->len - skb->data_len; | |
670 | int cur_len; | |
671 | ||
672 | frag_page = virt_to_head_page(skb->head); | |
673 | frag_ptr = skb->data; | |
674 | frag_size = head_size; | |
675 | ||
676 | while (offset >= frag_size) { | |
677 | offset -= frag_size; | |
2b67f944 FF |
678 | frag_page = skb_frag_page(frag); |
679 | frag_ptr = skb_frag_address(frag); | |
680 | frag_size = skb_frag_size(frag); | |
aa1702dd | 681 | frag++; |
2b67f944 FF |
682 | } |
683 | ||
684 | frag_ptr += offset; | |
685 | frag_len = frag_size - offset; | |
686 | ||
687 | cur_len = min(len, frag_len); | |
688 | ||
689 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
690 | len -= cur_len; | |
691 | ||
692 | while (len > 0) { | |
2b67f944 FF |
693 | frag_len = skb_frag_size(frag); |
694 | cur_len = min(len, frag_len); | |
695 | __frame_add_frag(frame, skb_frag_page(frag), | |
696 | skb_frag_address(frag), cur_len, frag_len); | |
697 | len -= cur_len; | |
aa1702dd | 698 | frag++; |
2b67f944 FF |
699 | } |
700 | } | |
701 | ||
230fd28a FF |
702 | static struct sk_buff * |
703 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 704 | int offset, int len, bool reuse_frag) |
230fd28a FF |
705 | { |
706 | struct sk_buff *frame; | |
2b67f944 | 707 | int cur_len = len; |
230fd28a FF |
708 | |
709 | if (skb->len - offset < len) | |
710 | return NULL; | |
711 | ||
2b67f944 FF |
712 | /* |
713 | * When reusing framents, copy some data to the head to simplify | |
714 | * ethernet header handling and speed up protocol header processing | |
715 | * in the stack later. | |
716 | */ | |
717 | if (reuse_frag) | |
718 | cur_len = min_t(int, len, 32); | |
719 | ||
230fd28a FF |
720 | /* |
721 | * Allocate and reserve two bytes more for payload | |
722 | * alignment since sizeof(struct ethhdr) is 14. | |
723 | */ | |
2b67f944 | 724 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
16a910a6 GG |
725 | if (!frame) |
726 | return NULL; | |
230fd28a FF |
727 | |
728 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
729 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
730 | ||
731 | len -= cur_len; | |
732 | if (!len) | |
733 | return frame; | |
734 | ||
735 | offset += cur_len; | |
736 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
737 | |
738 | return frame; | |
739 | } | |
eaf85ca7 ZY |
740 | |
741 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
742 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad | 743 | const unsigned int extra_headroom, |
8b935ee2 | 744 | const u8 *check_da, const u8 *check_sa) |
eaf85ca7 | 745 | { |
230fd28a | 746 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
747 | struct sk_buff *frame = NULL; |
748 | u16 ethertype; | |
749 | u8 *payload; | |
7f6990c8 | 750 | int offset = 0, remaining; |
230fd28a | 751 | struct ethhdr eth; |
2b67f944 | 752 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 753 | bool reuse_skb = false; |
230fd28a | 754 | bool last = false; |
88665f5a | 755 | |
230fd28a FF |
756 | while (!last) { |
757 | unsigned int subframe_len; | |
758 | int len; | |
eaf85ca7 | 759 | u8 padding; |
eaf85ca7 | 760 | |
230fd28a FF |
761 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
762 | len = ntohs(eth.h_proto); | |
763 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 764 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 765 | |
eaf85ca7 | 766 | /* the last MSDU has no padding */ |
230fd28a | 767 | remaining = skb->len - offset; |
eaf85ca7 ZY |
768 | if (subframe_len > remaining) |
769 | goto purge; | |
770 | ||
230fd28a | 771 | offset += sizeof(struct ethhdr); |
230fd28a | 772 | last = remaining <= subframe_len + padding; |
8b935ee2 JB |
773 | |
774 | /* FIXME: should we really accept multicast DA? */ | |
775 | if ((check_da && !is_multicast_ether_addr(eth.h_dest) && | |
776 | !ether_addr_equal(check_da, eth.h_dest)) || | |
777 | (check_sa && !ether_addr_equal(check_sa, eth.h_source))) { | |
778 | offset += len + padding; | |
779 | continue; | |
780 | } | |
781 | ||
782 | /* reuse skb for the last subframe */ | |
2b67f944 | 783 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 784 | skb_pull(skb, offset); |
eaf85ca7 | 785 | frame = skb; |
230fd28a FF |
786 | reuse_skb = true; |
787 | } else { | |
2b67f944 FF |
788 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
789 | reuse_frag); | |
eaf85ca7 ZY |
790 | if (!frame) |
791 | goto purge; | |
792 | ||
230fd28a | 793 | offset += len + padding; |
eaf85ca7 ZY |
794 | } |
795 | ||
796 | skb_reset_network_header(frame); | |
797 | frame->dev = skb->dev; | |
798 | frame->priority = skb->priority; | |
799 | ||
800 | payload = frame->data; | |
801 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 802 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 803 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 804 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
805 | eth.h_proto = htons(ethertype); |
806 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 807 | } |
230fd28a FF |
808 | |
809 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
810 | __skb_queue_tail(list, frame); |
811 | } | |
812 | ||
230fd28a FF |
813 | if (!reuse_skb) |
814 | dev_kfree_skb(skb); | |
815 | ||
eaf85ca7 ZY |
816 | return; |
817 | ||
818 | purge: | |
819 | __skb_queue_purge(list); | |
eaf85ca7 ZY |
820 | dev_kfree_skb(skb); |
821 | } | |
822 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
823 | ||
e31a16d6 | 824 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
825 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
826 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
827 | { |
828 | unsigned int dscp; | |
c6ca5e28 | 829 | unsigned char vlan_priority; |
e31a16d6 ZY |
830 | |
831 | /* skb->priority values from 256->263 are magic values to | |
832 | * directly indicate a specific 802.1d priority. This is used | |
833 | * to allow 802.1d priority to be passed directly in from VLAN | |
834 | * tags, etc. | |
835 | */ | |
836 | if (skb->priority >= 256 && skb->priority <= 263) | |
837 | return skb->priority - 256; | |
838 | ||
df8a39de JP |
839 | if (skb_vlan_tag_present(skb)) { |
840 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 V |
841 | >> VLAN_PRIO_SHIFT; |
842 | if (vlan_priority > 0) | |
843 | return vlan_priority; | |
844 | } | |
845 | ||
e31a16d6 ZY |
846 | switch (skb->protocol) { |
847 | case htons(ETH_P_IP): | |
b156579b DT |
848 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
849 | break; | |
850 | case htons(ETH_P_IPV6): | |
851 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 852 | break; |
960d97f9 SW |
853 | case htons(ETH_P_MPLS_UC): |
854 | case htons(ETH_P_MPLS_MC): { | |
855 | struct mpls_label mpls_tmp, *mpls; | |
856 | ||
857 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
858 | sizeof(*mpls), &mpls_tmp); | |
859 | if (!mpls) | |
860 | return 0; | |
861 | ||
862 | return (ntohl(mpls->entry) & MPLS_LS_TC_MASK) | |
863 | >> MPLS_LS_TC_SHIFT; | |
864 | } | |
865 | case htons(ETH_P_80221): | |
866 | /* 802.21 is always network control traffic */ | |
867 | return 7; | |
e31a16d6 ZY |
868 | default: |
869 | return 0; | |
870 | } | |
871 | ||
fa9ffc74 KP |
872 | if (qos_map) { |
873 | unsigned int i, tmp_dscp = dscp >> 2; | |
874 | ||
875 | for (i = 0; i < qos_map->num_des; i++) { | |
876 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) | |
877 | return qos_map->dscp_exception[i].up; | |
878 | } | |
879 | ||
880 | for (i = 0; i < 8; i++) { | |
881 | if (tmp_dscp >= qos_map->up[i].low && | |
882 | tmp_dscp <= qos_map->up[i].high) | |
883 | return i; | |
884 | } | |
885 | } | |
886 | ||
e31a16d6 ZY |
887 | return dscp >> 5; |
888 | } | |
889 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
890 | |
891 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
892 | { | |
9caf0364 JB |
893 | const struct cfg80211_bss_ies *ies; |
894 | ||
895 | ies = rcu_dereference(bss->ies); | |
896 | if (!ies) | |
517357c6 | 897 | return NULL; |
9caf0364 JB |
898 | |
899 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
900 | } |
901 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
902 | |
903 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
904 | { | |
f26cbf40 | 905 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
906 | struct net_device *dev = wdev->netdev; |
907 | int i; | |
908 | ||
909 | if (!wdev->connect_keys) | |
910 | return; | |
911 | ||
b8676221 | 912 | for (i = 0; i < CFG80211_MAX_WEP_KEYS; i++) { |
fffd0934 JB |
913 | if (!wdev->connect_keys->params[i].cipher) |
914 | continue; | |
e35e4d28 HG |
915 | if (rdev_add_key(rdev, dev, i, false, NULL, |
916 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 917 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
918 | continue; |
919 | } | |
d4f29978 JB |
920 | if (wdev->connect_keys->def == i && |
921 | rdev_set_default_key(rdev, dev, i, true, true)) { | |
922 | netdev_err(dev, "failed to set defkey %d\n", i); | |
923 | continue; | |
924 | } | |
fffd0934 JB |
925 | } |
926 | ||
b47f610b | 927 | kzfree(wdev->connect_keys); |
fffd0934 JB |
928 | wdev->connect_keys = NULL; |
929 | } | |
3d54d255 | 930 | |
1f6fc43e | 931 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
932 | { |
933 | struct cfg80211_event *ev; | |
934 | unsigned long flags; | |
3d54d255 JB |
935 | |
936 | spin_lock_irqsave(&wdev->event_lock, flags); | |
937 | while (!list_empty(&wdev->event_list)) { | |
938 | ev = list_first_entry(&wdev->event_list, | |
939 | struct cfg80211_event, list); | |
940 | list_del(&ev->list); | |
941 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
942 | ||
943 | wdev_lock(wdev); | |
944 | switch (ev->type) { | |
945 | case EVENT_CONNECT_RESULT: | |
3d54d255 | 946 | __cfg80211_connect_result( |
5349a0f7 VK |
947 | wdev->netdev, |
948 | &ev->cr, | |
949 | ev->cr.status == WLAN_STATUS_SUCCESS); | |
3d54d255 JB |
950 | break; |
951 | case EVENT_ROAMED: | |
29ce6ecb | 952 | __cfg80211_roamed(wdev, &ev->rm); |
3d54d255 JB |
953 | break; |
954 | case EVENT_DISCONNECTED: | |
955 | __cfg80211_disconnected(wdev->netdev, | |
956 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
957 | ev->dc.reason, |
958 | !ev->dc.locally_generated); | |
3d54d255 JB |
959 | break; |
960 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
961 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
962 | ev->ij.channel); | |
3d54d255 | 963 | break; |
f04c2203 MK |
964 | case EVENT_STOPPED: |
965 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
966 | break; | |
3d54d255 JB |
967 | } |
968 | wdev_unlock(wdev); | |
969 | ||
970 | kfree(ev); | |
971 | ||
972 | spin_lock_irqsave(&wdev->event_lock, flags); | |
973 | } | |
974 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
975 | } | |
976 | ||
977 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
978 | { | |
979 | struct wireless_dev *wdev; | |
980 | ||
981 | ASSERT_RTNL(); | |
3d54d255 | 982 | |
53873f13 | 983 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 984 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
985 | } |
986 | ||
987 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
988 | struct net_device *dev, enum nl80211_iftype ntype, | |
818a986e | 989 | struct vif_params *params) |
3d54d255 JB |
990 | { |
991 | int err; | |
992 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
993 | ||
73fb08e2 | 994 | ASSERT_RTNL(); |
3d54d255 JB |
995 | |
996 | /* don't support changing VLANs, you just re-create them */ | |
997 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
998 | return -EOPNOTSUPP; | |
999 | ||
cb3b7d87 AB |
1000 | /* cannot change into P2P device or NAN */ |
1001 | if (ntype == NL80211_IFTYPE_P2P_DEVICE || | |
1002 | ntype == NL80211_IFTYPE_NAN) | |
98104fde JB |
1003 | return -EOPNOTSUPP; |
1004 | ||
3d54d255 JB |
1005 | if (!rdev->ops->change_virtual_intf || |
1006 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
1007 | return -EOPNOTSUPP; | |
1008 | ||
ad4bb6f8 | 1009 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 1010 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
1011 | (ntype == NL80211_IFTYPE_ADHOC || |
1012 | ntype == NL80211_IFTYPE_STATION || | |
1013 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
1014 | return -EBUSY; |
1015 | ||
6cbfb1bb | 1016 | if (ntype != otype) { |
9bc383de | 1017 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 1018 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 1019 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 1020 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 1021 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 1022 | |
3d54d255 | 1023 | switch (otype) { |
ac800140 | 1024 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 1025 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 1026 | break; |
3d54d255 JB |
1027 | case NL80211_IFTYPE_ADHOC: |
1028 | cfg80211_leave_ibss(rdev, dev, false); | |
1029 | break; | |
1030 | case NL80211_IFTYPE_STATION: | |
074ac8df | 1031 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 1032 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
1033 | cfg80211_disconnect(rdev, dev, |
1034 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 1035 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
1036 | break; |
1037 | case NL80211_IFTYPE_MESH_POINT: | |
1038 | /* mesh should be handled? */ | |
1039 | break; | |
1040 | default: | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | cfg80211_process_rdev_events(rdev); | |
1045 | } | |
1046 | ||
818a986e | 1047 | err = rdev_change_virtual_intf(rdev, dev, ntype, params); |
3d54d255 JB |
1048 | |
1049 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
1050 | ||
9bc383de JB |
1051 | if (!err && params && params->use_4addr != -1) |
1052 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1053 | ||
ad4bb6f8 JB |
1054 | if (!err) { |
1055 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
1056 | switch (ntype) { | |
1057 | case NL80211_IFTYPE_STATION: | |
1058 | if (dev->ieee80211_ptr->use_4addr) | |
1059 | break; | |
1060 | /* fall through */ | |
6e0bd6c3 | 1061 | case NL80211_IFTYPE_OCB: |
074ac8df | 1062 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
1063 | case NL80211_IFTYPE_ADHOC: |
1064 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
1065 | break; | |
074ac8df | 1066 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
1067 | case NL80211_IFTYPE_AP: |
1068 | case NL80211_IFTYPE_AP_VLAN: | |
1069 | case NL80211_IFTYPE_WDS: | |
1070 | case NL80211_IFTYPE_MESH_POINT: | |
1071 | /* bridging OK */ | |
1072 | break; | |
1073 | case NL80211_IFTYPE_MONITOR: | |
1074 | /* monitor can't bridge anyway */ | |
1075 | break; | |
1076 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1077 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
1078 | /* not happening */ |
1079 | break; | |
98104fde | 1080 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 1081 | case NL80211_IFTYPE_NAN: |
98104fde JB |
1082 | WARN_ON(1); |
1083 | break; | |
ad4bb6f8 JB |
1084 | } |
1085 | } | |
1086 | ||
dbbae26a MK |
1087 | if (!err && ntype != otype && netif_running(dev)) { |
1088 | cfg80211_update_iface_num(rdev, ntype, 1); | |
1089 | cfg80211_update_iface_num(rdev, otype, -1); | |
1090 | } | |
1091 | ||
3d54d255 JB |
1092 | return err; |
1093 | } | |
254416aa | 1094 | |
0c1eca4e JB |
1095 | static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) |
1096 | { | |
1097 | int modulation, streams, bitrate; | |
1098 | ||
1099 | /* the formula below does only work for MCS values smaller than 32 */ | |
1100 | if (WARN_ON_ONCE(rate->mcs >= 32)) | |
1101 | return 0; | |
1102 | ||
1103 | modulation = rate->mcs & 7; | |
1104 | streams = (rate->mcs >> 3) + 1; | |
1105 | ||
1106 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; | |
1107 | ||
1108 | if (modulation < 4) | |
1109 | bitrate *= (modulation + 1); | |
1110 | else if (modulation == 4) | |
1111 | bitrate *= (modulation + 2); | |
1112 | else | |
1113 | bitrate *= (modulation + 3); | |
1114 | ||
1115 | bitrate *= streams; | |
1116 | ||
1117 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1118 | bitrate = (bitrate / 9) * 10; | |
1119 | ||
1120 | /* do NOT round down here */ | |
1121 | return (bitrate + 50000) / 100000; | |
1122 | } | |
1123 | ||
95ddc1fc VK |
1124 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
1125 | { | |
1126 | static const u32 __mcs2bitrate[] = { | |
1127 | /* control PHY */ | |
1128 | [0] = 275, | |
1129 | /* SC PHY */ | |
1130 | [1] = 3850, | |
1131 | [2] = 7700, | |
1132 | [3] = 9625, | |
1133 | [4] = 11550, | |
1134 | [5] = 12512, /* 1251.25 mbps */ | |
1135 | [6] = 15400, | |
1136 | [7] = 19250, | |
1137 | [8] = 23100, | |
1138 | [9] = 25025, | |
1139 | [10] = 30800, | |
1140 | [11] = 38500, | |
1141 | [12] = 46200, | |
1142 | /* OFDM PHY */ | |
1143 | [13] = 6930, | |
1144 | [14] = 8662, /* 866.25 mbps */ | |
1145 | [15] = 13860, | |
1146 | [16] = 17325, | |
1147 | [17] = 20790, | |
1148 | [18] = 27720, | |
1149 | [19] = 34650, | |
1150 | [20] = 41580, | |
1151 | [21] = 45045, | |
1152 | [22] = 51975, | |
1153 | [23] = 62370, | |
1154 | [24] = 67568, /* 6756.75 mbps */ | |
1155 | /* LP-SC PHY */ | |
1156 | [25] = 6260, | |
1157 | [26] = 8340, | |
1158 | [27] = 11120, | |
1159 | [28] = 12510, | |
1160 | [29] = 16680, | |
1161 | [30] = 22240, | |
1162 | [31] = 25030, | |
1163 | }; | |
1164 | ||
1165 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1166 | return 0; | |
1167 | ||
1168 | return __mcs2bitrate[rate->mcs]; | |
1169 | } | |
1170 | ||
db9c64cf JB |
1171 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1172 | { | |
1173 | static const u32 base[4][10] = { | |
1174 | { 6500000, | |
1175 | 13000000, | |
1176 | 19500000, | |
1177 | 26000000, | |
1178 | 39000000, | |
1179 | 52000000, | |
1180 | 58500000, | |
1181 | 65000000, | |
1182 | 78000000, | |
8fdd136f PT |
1183 | /* not in the spec, but some devices use this: */ |
1184 | 86500000, | |
db9c64cf JB |
1185 | }, |
1186 | { 13500000, | |
1187 | 27000000, | |
1188 | 40500000, | |
1189 | 54000000, | |
1190 | 81000000, | |
1191 | 108000000, | |
1192 | 121500000, | |
1193 | 135000000, | |
1194 | 162000000, | |
1195 | 180000000, | |
1196 | }, | |
1197 | { 29300000, | |
1198 | 58500000, | |
1199 | 87800000, | |
1200 | 117000000, | |
1201 | 175500000, | |
1202 | 234000000, | |
1203 | 263300000, | |
1204 | 292500000, | |
1205 | 351000000, | |
1206 | 390000000, | |
1207 | }, | |
1208 | { 58500000, | |
1209 | 117000000, | |
1210 | 175500000, | |
1211 | 234000000, | |
1212 | 351000000, | |
1213 | 468000000, | |
1214 | 526500000, | |
1215 | 585000000, | |
1216 | 702000000, | |
1217 | 780000000, | |
1218 | }, | |
1219 | }; | |
1220 | u32 bitrate; | |
1221 | int idx; | |
1222 | ||
ca8fe250 JB |
1223 | if (rate->mcs > 9) |
1224 | goto warn; | |
db9c64cf | 1225 | |
b51f3bee JB |
1226 | switch (rate->bw) { |
1227 | case RATE_INFO_BW_160: | |
1228 | idx = 3; | |
1229 | break; | |
1230 | case RATE_INFO_BW_80: | |
1231 | idx = 2; | |
1232 | break; | |
1233 | case RATE_INFO_BW_40: | |
1234 | idx = 1; | |
1235 | break; | |
1236 | case RATE_INFO_BW_5: | |
1237 | case RATE_INFO_BW_10: | |
1238 | default: | |
ca8fe250 | 1239 | goto warn; |
b51f3bee JB |
1240 | case RATE_INFO_BW_20: |
1241 | idx = 0; | |
1242 | } | |
db9c64cf JB |
1243 | |
1244 | bitrate = base[idx][rate->mcs]; | |
1245 | bitrate *= rate->nss; | |
1246 | ||
1247 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1248 | bitrate = (bitrate / 9) * 10; | |
1249 | ||
1250 | /* do NOT round down here */ | |
1251 | return (bitrate + 50000) / 100000; | |
ca8fe250 JB |
1252 | warn: |
1253 | WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", | |
1254 | rate->bw, rate->mcs, rate->nss); | |
1255 | return 0; | |
db9c64cf JB |
1256 | } |
1257 | ||
8eb41c8d | 1258 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa | 1259 | { |
0c1eca4e JB |
1260 | if (rate->flags & RATE_INFO_FLAGS_MCS) |
1261 | return cfg80211_calculate_bitrate_ht(rate); | |
95ddc1fc VK |
1262 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1263 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1264 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1265 | return cfg80211_calculate_bitrate_vht(rate); | |
254416aa | 1266 | |
0c1eca4e | 1267 | return rate->legacy; |
254416aa | 1268 | } |
8097e149 | 1269 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1270 | |
c216e641 AS |
1271 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1272 | enum ieee80211_p2p_attr_id attr, | |
1273 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1274 | { |
1275 | u8 *out = buf; | |
1276 | u16 attr_remaining = 0; | |
1277 | bool desired_attr = false; | |
1278 | u16 desired_len = 0; | |
1279 | ||
1280 | while (len > 0) { | |
1281 | unsigned int iedatalen; | |
1282 | unsigned int copy; | |
1283 | const u8 *iedata; | |
1284 | ||
1285 | if (len < 2) | |
1286 | return -EILSEQ; | |
1287 | iedatalen = ies[1]; | |
1288 | if (iedatalen + 2 > len) | |
1289 | return -EILSEQ; | |
1290 | ||
1291 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1292 | goto cont; | |
1293 | ||
1294 | if (iedatalen < 4) | |
1295 | goto cont; | |
1296 | ||
1297 | iedata = ies + 2; | |
1298 | ||
1299 | /* check WFA OUI, P2P subtype */ | |
1300 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1301 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1302 | goto cont; | |
1303 | ||
1304 | iedatalen -= 4; | |
1305 | iedata += 4; | |
1306 | ||
1307 | /* check attribute continuation into this IE */ | |
1308 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1309 | if (copy && desired_attr) { | |
1310 | desired_len += copy; | |
1311 | if (out) { | |
1312 | memcpy(out, iedata, min(bufsize, copy)); | |
1313 | out += min(bufsize, copy); | |
1314 | bufsize -= min(bufsize, copy); | |
1315 | } | |
1316 | ||
1317 | ||
1318 | if (copy == attr_remaining) | |
1319 | return desired_len; | |
1320 | } | |
1321 | ||
1322 | attr_remaining -= copy; | |
1323 | if (attr_remaining) | |
1324 | goto cont; | |
1325 | ||
1326 | iedatalen -= copy; | |
1327 | iedata += copy; | |
1328 | ||
1329 | while (iedatalen > 0) { | |
1330 | u16 attr_len; | |
1331 | ||
1332 | /* P2P attribute ID & size must fit */ | |
1333 | if (iedatalen < 3) | |
1334 | return -EILSEQ; | |
1335 | desired_attr = iedata[0] == attr; | |
1336 | attr_len = get_unaligned_le16(iedata + 1); | |
1337 | iedatalen -= 3; | |
1338 | iedata += 3; | |
1339 | ||
1340 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1341 | ||
1342 | if (desired_attr) { | |
1343 | desired_len += copy; | |
1344 | if (out) { | |
1345 | memcpy(out, iedata, min(bufsize, copy)); | |
1346 | out += min(bufsize, copy); | |
1347 | bufsize -= min(bufsize, copy); | |
1348 | } | |
1349 | ||
1350 | if (copy == attr_len) | |
1351 | return desired_len; | |
1352 | } | |
1353 | ||
1354 | iedata += copy; | |
1355 | iedatalen -= copy; | |
1356 | attr_remaining = attr_len - copy; | |
1357 | } | |
1358 | ||
1359 | cont: | |
1360 | len -= ies[1] + 2; | |
1361 | ies += ies[1] + 2; | |
1362 | } | |
1363 | ||
1364 | if (attr_remaining && desired_attr) | |
1365 | return -EILSEQ; | |
1366 | ||
1367 | return -ENOENT; | |
1368 | } | |
1369 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1370 | ||
29464ccc JB |
1371 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) |
1372 | { | |
1373 | int i; | |
1374 | ||
1375 | for (i = 0; i < n_ids; i++) | |
1376 | if (ids[i] == id) | |
1377 | return true; | |
1378 | return false; | |
1379 | } | |
1380 | ||
8ac63448 JB |
1381 | static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) |
1382 | { | |
1383 | /* we assume a validly formed IEs buffer */ | |
1384 | u8 len = ies[pos + 1]; | |
1385 | ||
1386 | pos += 2 + len; | |
1387 | ||
1388 | /* the IE itself must have 255 bytes for fragments to follow */ | |
1389 | if (len < 255) | |
1390 | return pos; | |
1391 | ||
1392 | while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { | |
1393 | len = ies[pos + 1]; | |
1394 | pos += 2 + len; | |
1395 | } | |
1396 | ||
1397 | return pos; | |
1398 | } | |
1399 | ||
29464ccc JB |
1400 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, |
1401 | const u8 *ids, int n_ids, | |
1402 | const u8 *after_ric, int n_after_ric, | |
1403 | size_t offset) | |
1404 | { | |
1405 | size_t pos = offset; | |
1406 | ||
1407 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) { | |
1408 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { | |
8ac63448 | 1409 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1410 | |
1411 | while (pos < ielen && | |
1412 | !ieee80211_id_in_list(after_ric, n_after_ric, | |
1413 | ies[pos])) | |
8ac63448 | 1414 | pos = skip_ie(ies, ielen, pos); |
29464ccc | 1415 | } else { |
8ac63448 | 1416 | pos = skip_ie(ies, ielen, pos); |
29464ccc JB |
1417 | } |
1418 | } | |
1419 | ||
1420 | return pos; | |
1421 | } | |
1422 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1423 | ||
1ce3e82b | 1424 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1425 | enum nl80211_band *band) |
1ce3e82b JB |
1426 | { |
1427 | switch (operating_class) { | |
1428 | case 112: | |
1429 | case 115 ... 127: | |
954a86ef | 1430 | case 128 ... 130: |
57fbcce3 | 1431 | *band = NL80211_BAND_5GHZ; |
1ce3e82b JB |
1432 | return true; |
1433 | case 81: | |
1434 | case 82: | |
1435 | case 83: | |
1436 | case 84: | |
57fbcce3 | 1437 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1438 | return true; |
55300a13 | 1439 | case 180: |
57fbcce3 | 1440 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1441 | return true; |
1ce3e82b JB |
1442 | } |
1443 | ||
1444 | return false; | |
1445 | } | |
1446 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1447 | ||
a38700dd AN |
1448 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1449 | u8 *op_class) | |
1450 | { | |
1451 | u8 vht_opclass; | |
1452 | u16 freq = chandef->center_freq1; | |
1453 | ||
1454 | if (freq >= 2412 && freq <= 2472) { | |
1455 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1456 | return false; | |
1457 | ||
1458 | /* 2.407 GHz, channels 1..13 */ | |
1459 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1460 | if (freq > chandef->chan->center_freq) | |
1461 | *op_class = 83; /* HT40+ */ | |
1462 | else | |
1463 | *op_class = 84; /* HT40- */ | |
1464 | } else { | |
1465 | *op_class = 81; | |
1466 | } | |
1467 | ||
1468 | return true; | |
1469 | } | |
1470 | ||
1471 | if (freq == 2484) { | |
1472 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1473 | return false; | |
1474 | ||
1475 | *op_class = 82; /* channel 14 */ | |
1476 | return true; | |
1477 | } | |
1478 | ||
1479 | switch (chandef->width) { | |
1480 | case NL80211_CHAN_WIDTH_80: | |
1481 | vht_opclass = 128; | |
1482 | break; | |
1483 | case NL80211_CHAN_WIDTH_160: | |
1484 | vht_opclass = 129; | |
1485 | break; | |
1486 | case NL80211_CHAN_WIDTH_80P80: | |
1487 | vht_opclass = 130; | |
1488 | break; | |
1489 | case NL80211_CHAN_WIDTH_10: | |
1490 | case NL80211_CHAN_WIDTH_5: | |
1491 | return false; /* unsupported for now */ | |
1492 | default: | |
1493 | vht_opclass = 0; | |
1494 | break; | |
1495 | } | |
1496 | ||
1497 | /* 5 GHz, channels 36..48 */ | |
1498 | if (freq >= 5180 && freq <= 5240) { | |
1499 | if (vht_opclass) { | |
1500 | *op_class = vht_opclass; | |
1501 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1502 | if (freq > chandef->chan->center_freq) | |
1503 | *op_class = 116; | |
1504 | else | |
1505 | *op_class = 117; | |
1506 | } else { | |
1507 | *op_class = 115; | |
1508 | } | |
1509 | ||
1510 | return true; | |
1511 | } | |
1512 | ||
1513 | /* 5 GHz, channels 52..64 */ | |
1514 | if (freq >= 5260 && freq <= 5320) { | |
1515 | if (vht_opclass) { | |
1516 | *op_class = vht_opclass; | |
1517 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1518 | if (freq > chandef->chan->center_freq) | |
1519 | *op_class = 119; | |
1520 | else | |
1521 | *op_class = 120; | |
1522 | } else { | |
1523 | *op_class = 118; | |
1524 | } | |
1525 | ||
1526 | return true; | |
1527 | } | |
1528 | ||
1529 | /* 5 GHz, channels 100..144 */ | |
1530 | if (freq >= 5500 && freq <= 5720) { | |
1531 | if (vht_opclass) { | |
1532 | *op_class = vht_opclass; | |
1533 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1534 | if (freq > chandef->chan->center_freq) | |
1535 | *op_class = 122; | |
1536 | else | |
1537 | *op_class = 123; | |
1538 | } else { | |
1539 | *op_class = 121; | |
1540 | } | |
1541 | ||
1542 | return true; | |
1543 | } | |
1544 | ||
1545 | /* 5 GHz, channels 149..169 */ | |
1546 | if (freq >= 5745 && freq <= 5845) { | |
1547 | if (vht_opclass) { | |
1548 | *op_class = vht_opclass; | |
1549 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1550 | if (freq > chandef->chan->center_freq) | |
1551 | *op_class = 126; | |
1552 | else | |
1553 | *op_class = 127; | |
1554 | } else if (freq <= 5805) { | |
1555 | *op_class = 124; | |
1556 | } else { | |
1557 | *op_class = 125; | |
1558 | } | |
1559 | ||
1560 | return true; | |
1561 | } | |
1562 | ||
1563 | /* 56.16 GHz, channel 1..4 */ | |
1564 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) { | |
1565 | if (chandef->width >= NL80211_CHAN_WIDTH_40) | |
1566 | return false; | |
1567 | ||
1568 | *op_class = 180; | |
1569 | return true; | |
1570 | } | |
1571 | ||
1572 | /* not supported yet */ | |
1573 | return false; | |
1574 | } | |
1575 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1576 | ||
4c8dea63 JB |
1577 | static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, |
1578 | u32 *beacon_int_gcd, | |
1579 | bool *beacon_int_different) | |
56d1893d JB |
1580 | { |
1581 | struct wireless_dev *wdev; | |
56d1893d | 1582 | |
4c8dea63 JB |
1583 | *beacon_int_gcd = 0; |
1584 | *beacon_int_different = false; | |
56d1893d | 1585 | |
4c8dea63 | 1586 | list_for_each_entry(wdev, &wiphy->wdev_list, list) { |
56d1893d JB |
1587 | if (!wdev->beacon_interval) |
1588 | continue; | |
0c317a02 | 1589 | |
4c8dea63 JB |
1590 | if (!*beacon_int_gcd) { |
1591 | *beacon_int_gcd = wdev->beacon_interval; | |
0c317a02 | 1592 | continue; |
4c8dea63 | 1593 | } |
0c317a02 | 1594 | |
4c8dea63 | 1595 | if (wdev->beacon_interval == *beacon_int_gcd) |
0c317a02 PK |
1596 | continue; |
1597 | ||
4c8dea63 JB |
1598 | *beacon_int_different = true; |
1599 | *beacon_int_gcd = gcd(*beacon_int_gcd, wdev->beacon_interval); | |
1600 | } | |
0c317a02 | 1601 | |
4c8dea63 JB |
1602 | if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { |
1603 | if (*beacon_int_gcd) | |
1604 | *beacon_int_different = true; | |
1605 | *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); | |
56d1893d | 1606 | } |
4c8dea63 | 1607 | } |
56d1893d | 1608 | |
4c8dea63 JB |
1609 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1610 | enum nl80211_iftype iftype, u32 beacon_int) | |
1611 | { | |
1612 | /* | |
1613 | * This is just a basic pre-condition check; if interface combinations | |
1614 | * are possible the driver must already be checking those with a call | |
1615 | * to cfg80211_check_combinations(), in which case we'll validate more | |
1616 | * through the cfg80211_calculate_bi_data() call and code in | |
1617 | * cfg80211_iter_combinations(). | |
1618 | */ | |
1619 | ||
1620 | if (beacon_int < 10 || beacon_int > 10000) | |
1621 | return -EINVAL; | |
1622 | ||
1623 | return 0; | |
56d1893d | 1624 | } |
7527a782 | 1625 | |
65a124dd | 1626 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
e227300c | 1627 | struct iface_combination_params *params, |
65a124dd MK |
1628 | void (*iter)(const struct ieee80211_iface_combination *c, |
1629 | void *data), | |
1630 | void *data) | |
cb2d956d | 1631 | { |
8c48b50a FF |
1632 | const struct ieee80211_regdomain *regdom; |
1633 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1634 | int i, j, iftype; |
1635 | int num_interfaces = 0; | |
1636 | u32 used_iftypes = 0; | |
4c8dea63 JB |
1637 | u32 beacon_int_gcd; |
1638 | bool beacon_int_different; | |
1639 | ||
1640 | /* | |
1641 | * This is a bit strange, since the iteration used to rely only on | |
1642 | * the data given by the driver, but here it now relies on context, | |
1643 | * in form of the currently operating interfaces. | |
1644 | * This is OK for all current users, and saves us from having to | |
1645 | * push the GCD calculations into all the drivers. | |
1646 | * In the future, this should probably rely more on data that's in | |
1647 | * cfg80211 already - the only thing not would appear to be any new | |
1648 | * interfaces (while being brought up) and channel/radar data. | |
1649 | */ | |
1650 | cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, | |
1651 | &beacon_int_gcd, &beacon_int_different); | |
cb2d956d | 1652 | |
e227300c | 1653 | if (params->radar_detect) { |
8c48b50a FF |
1654 | rcu_read_lock(); |
1655 | regdom = rcu_dereference(cfg80211_regdomain); | |
1656 | if (regdom) | |
1657 | region = regdom->dfs_region; | |
1658 | rcu_read_unlock(); | |
1659 | } | |
1660 | ||
cb2d956d | 1661 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
e227300c PK |
1662 | num_interfaces += params->iftype_num[iftype]; |
1663 | if (params->iftype_num[iftype] > 0 && | |
cb2d956d LC |
1664 | !(wiphy->software_iftypes & BIT(iftype))) |
1665 | used_iftypes |= BIT(iftype); | |
1666 | } | |
1667 | ||
1668 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1669 | const struct ieee80211_iface_combination *c; | |
1670 | struct ieee80211_iface_limit *limits; | |
1671 | u32 all_iftypes = 0; | |
1672 | ||
1673 | c = &wiphy->iface_combinations[i]; | |
1674 | ||
1675 | if (num_interfaces > c->max_interfaces) | |
1676 | continue; | |
e227300c | 1677 | if (params->num_different_channels > c->num_different_channels) |
cb2d956d LC |
1678 | continue; |
1679 | ||
1680 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1681 | GFP_KERNEL); | |
1682 | if (!limits) | |
1683 | return -ENOMEM; | |
1684 | ||
1685 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1686 | if (wiphy->software_iftypes & BIT(iftype)) | |
1687 | continue; | |
1688 | for (j = 0; j < c->n_limits; j++) { | |
1689 | all_iftypes |= limits[j].types; | |
1690 | if (!(limits[j].types & BIT(iftype))) | |
1691 | continue; | |
e227300c | 1692 | if (limits[j].max < params->iftype_num[iftype]) |
cb2d956d | 1693 | goto cont; |
e227300c | 1694 | limits[j].max -= params->iftype_num[iftype]; |
cb2d956d LC |
1695 | } |
1696 | } | |
1697 | ||
e227300c PK |
1698 | if (params->radar_detect != |
1699 | (c->radar_detect_widths & params->radar_detect)) | |
cb2d956d LC |
1700 | goto cont; |
1701 | ||
e227300c | 1702 | if (params->radar_detect && c->radar_detect_regions && |
8c48b50a FF |
1703 | !(c->radar_detect_regions & BIT(region))) |
1704 | goto cont; | |
1705 | ||
cb2d956d LC |
1706 | /* Finally check that all iftypes that we're currently |
1707 | * using are actually part of this combination. If they | |
1708 | * aren't then we can't use this combination and have | |
1709 | * to continue to the next. | |
1710 | */ | |
1711 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1712 | goto cont; | |
1713 | ||
4c8dea63 | 1714 | if (beacon_int_gcd) { |
0c317a02 | 1715 | if (c->beacon_int_min_gcd && |
4c8dea63 | 1716 | beacon_int_gcd < c->beacon_int_min_gcd) |
0507a3ac | 1717 | goto cont; |
4c8dea63 | 1718 | if (!c->beacon_int_min_gcd && beacon_int_different) |
0c317a02 PK |
1719 | goto cont; |
1720 | } | |
1721 | ||
cb2d956d LC |
1722 | /* This combination covered all interface types and |
1723 | * supported the requested numbers, so we're good. | |
1724 | */ | |
65a124dd MK |
1725 | |
1726 | (*iter)(c, data); | |
cb2d956d LC |
1727 | cont: |
1728 | kfree(limits); | |
1729 | } | |
1730 | ||
65a124dd MK |
1731 | return 0; |
1732 | } | |
1733 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1734 | ||
1735 | static void | |
1736 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1737 | void *data) | |
1738 | { | |
1739 | int *num = data; | |
1740 | (*num)++; | |
1741 | } | |
1742 | ||
1743 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
e227300c | 1744 | struct iface_combination_params *params) |
65a124dd MK |
1745 | { |
1746 | int err, num = 0; | |
1747 | ||
e227300c | 1748 | err = cfg80211_iter_combinations(wiphy, params, |
65a124dd MK |
1749 | cfg80211_iter_sum_ifcombs, &num); |
1750 | if (err) | |
1751 | return err; | |
1752 | if (num == 0) | |
1753 | return -EBUSY; | |
1754 | ||
1755 | return 0; | |
cb2d956d LC |
1756 | } |
1757 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1758 | ||
34850ab2 JB |
1759 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1760 | const u8 *rates, unsigned int n_rates, | |
1761 | u32 *mask) | |
1762 | { | |
1763 | int i, j; | |
1764 | ||
a401d2bb JB |
1765 | if (!sband) |
1766 | return -EINVAL; | |
1767 | ||
34850ab2 JB |
1768 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1769 | return -EINVAL; | |
1770 | ||
1771 | *mask = 0; | |
1772 | ||
1773 | for (i = 0; i < n_rates; i++) { | |
1774 | int rate = (rates[i] & 0x7f) * 5; | |
1775 | bool found = false; | |
1776 | ||
1777 | for (j = 0; j < sband->n_bitrates; j++) { | |
1778 | if (sband->bitrates[j].bitrate == rate) { | |
1779 | found = true; | |
1780 | *mask |= BIT(j); | |
1781 | break; | |
1782 | } | |
1783 | } | |
1784 | if (!found) | |
1785 | return -EINVAL; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * mask must have at least one bit set here since we | |
1790 | * didn't accept a 0-length rates array nor allowed | |
1791 | * entries in the array that didn't exist | |
1792 | */ | |
1793 | ||
1794 | return 0; | |
1795 | } | |
11a2a357 | 1796 | |
bdfbec2d IP |
1797 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1798 | { | |
57fbcce3 | 1799 | enum nl80211_band band; |
bdfbec2d IP |
1800 | unsigned int n_channels = 0; |
1801 | ||
57fbcce3 | 1802 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1803 | if (wiphy->bands[band]) |
1804 | n_channels += wiphy->bands[band]->n_channels; | |
1805 | ||
1806 | return n_channels; | |
1807 | } | |
1808 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1809 | ||
7406353d AQ |
1810 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1811 | struct station_info *sinfo) | |
1812 | { | |
1813 | struct cfg80211_registered_device *rdev; | |
1814 | struct wireless_dev *wdev; | |
1815 | ||
1816 | wdev = dev->ieee80211_ptr; | |
1817 | if (!wdev) | |
1818 | return -EOPNOTSUPP; | |
1819 | ||
1820 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1821 | if (!rdev->ops->get_station) | |
1822 | return -EOPNOTSUPP; | |
1823 | ||
1824 | return rdev_get_station(rdev, dev, mac_addr, sinfo); | |
1825 | } | |
1826 | EXPORT_SYMBOL(cfg80211_get_station); | |
1827 | ||
a442b761 AB |
1828 | void cfg80211_free_nan_func(struct cfg80211_nan_func *f) |
1829 | { | |
1830 | int i; | |
1831 | ||
1832 | if (!f) | |
1833 | return; | |
1834 | ||
1835 | kfree(f->serv_spec_info); | |
1836 | kfree(f->srf_bf); | |
1837 | kfree(f->srf_macs); | |
1838 | for (i = 0; i < f->num_rx_filters; i++) | |
1839 | kfree(f->rx_filters[i].filter); | |
1840 | ||
1841 | for (i = 0; i < f->num_tx_filters; i++) | |
1842 | kfree(f->tx_filters[i].filter); | |
1843 | ||
1844 | kfree(f->rx_filters); | |
1845 | kfree(f->tx_filters); | |
1846 | kfree(f); | |
1847 | } | |
1848 | EXPORT_SYMBOL(cfg80211_free_nan_func); | |
1849 | ||
4787cfa0 RM |
1850 | bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, |
1851 | u32 center_freq_khz, u32 bw_khz) | |
1852 | { | |
1853 | u32 start_freq_khz, end_freq_khz; | |
1854 | ||
1855 | start_freq_khz = center_freq_khz - (bw_khz / 2); | |
1856 | end_freq_khz = center_freq_khz + (bw_khz / 2); | |
1857 | ||
1858 | if (start_freq_khz >= freq_range->start_freq_khz && | |
1859 | end_freq_khz <= freq_range->end_freq_khz) | |
1860 | return true; | |
1861 | ||
1862 | return false; | |
1863 | } | |
1864 | ||
11a2a357 JB |
1865 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1866 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1867 | const unsigned char rfc1042_header[] __aligned(2) = | |
1868 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1869 | EXPORT_SYMBOL(rfc1042_header); | |
1870 | ||
1871 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1872 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1873 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1874 | EXPORT_SYMBOL(bridge_tunnel_header); |