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