Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Wireless utility functions | |
3 | * | |
d3236553 | 4 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
2740f0cf | 5 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 6 | */ |
bc3b2d7f | 7 | #include <linux/export.h> |
d3236553 | 8 | #include <linux/bitops.h> |
e31a16d6 | 9 | #include <linux/etherdevice.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
d3236553 | 11 | #include <net/cfg80211.h> |
e31a16d6 | 12 | #include <net/ip.h> |
b156579b | 13 | #include <net/dsfield.h> |
c6ca5e28 | 14 | #include <linux/if_vlan.h> |
960d97f9 | 15 | #include <linux/mpls.h> |
8318d78a | 16 | #include "core.h" |
e35e4d28 HG |
17 | #include "rdev-ops.h" |
18 | ||
8318d78a | 19 | |
bd815252 JB |
20 | struct ieee80211_rate * |
21 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 22 | u32 basic_rates, int bitrate) |
bd815252 JB |
23 | { |
24 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
25 | int i; | |
26 | ||
27 | for (i = 0; i < sband->n_bitrates; i++) { | |
28 | if (!(basic_rates & BIT(i))) | |
29 | continue; | |
30 | if (sband->bitrates[i].bitrate > bitrate) | |
31 | continue; | |
32 | result = &sband->bitrates[i]; | |
33 | } | |
34 | ||
35 | return result; | |
36 | } | |
37 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
38 | ||
74608aca SW |
39 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
40 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
41 | { |
42 | struct ieee80211_rate *bitrates; | |
43 | u32 mandatory_rates = 0; | |
44 | enum ieee80211_rate_flags mandatory_flag; | |
45 | int i; | |
46 | ||
47 | if (WARN_ON(!sband)) | |
48 | return 1; | |
49 | ||
57fbcce3 | 50 | if (sband->band == NL80211_BAND_2GHZ) { |
74608aca SW |
51 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || |
52 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
53 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
54 | else | |
55 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
56 | } else { | |
b422c6cd | 57 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 58 | } |
b422c6cd AN |
59 | |
60 | bitrates = sband->bitrates; | |
61 | for (i = 0; i < sband->n_bitrates; i++) | |
62 | if (bitrates[i].flags & mandatory_flag) | |
63 | mandatory_rates |= BIT(i); | |
64 | return mandatory_rates; | |
65 | } | |
66 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
67 | ||
57fbcce3 | 68 | int ieee80211_channel_to_frequency(int chan, enum nl80211_band band) |
8318d78a | 69 | { |
59eb21a6 BR |
70 | /* see 802.11 17.3.8.3.2 and Annex J |
71 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
72 | if (chan <= 0) |
73 | return 0; /* not supported */ | |
74 | switch (band) { | |
57fbcce3 | 75 | case NL80211_BAND_2GHZ: |
59eb21a6 BR |
76 | if (chan == 14) |
77 | return 2484; | |
78 | else if (chan < 14) | |
79 | return 2407 + chan * 5; | |
3a0c52a6 | 80 | break; |
57fbcce3 | 81 | case NL80211_BAND_5GHZ: |
3a0c52a6 VK |
82 | if (chan >= 182 && chan <= 196) |
83 | return 4000 + chan * 5; | |
59eb21a6 | 84 | else |
3a0c52a6 VK |
85 | return 5000 + chan * 5; |
86 | break; | |
57fbcce3 | 87 | case NL80211_BAND_60GHZ: |
3a0c52a6 VK |
88 | if (chan < 5) |
89 | return 56160 + chan * 2160; | |
90 | break; | |
91 | default: | |
92 | ; | |
59eb21a6 | 93 | } |
3a0c52a6 | 94 | return 0; /* not supported */ |
8318d78a JB |
95 | } |
96 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
97 | ||
98 | int ieee80211_frequency_to_channel(int freq) | |
99 | { | |
59eb21a6 | 100 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
101 | if (freq == 2484) |
102 | return 14; | |
59eb21a6 | 103 | else if (freq < 2484) |
8318d78a | 104 | return (freq - 2407) / 5; |
59eb21a6 BR |
105 | else if (freq >= 4910 && freq <= 4980) |
106 | return (freq - 4000) / 5; | |
3a0c52a6 | 107 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 108 | return (freq - 5000) / 5; |
3a0c52a6 VK |
109 | else if (freq >= 58320 && freq <= 64800) |
110 | return (freq - 56160) / 2160; | |
111 | else | |
112 | return 0; | |
8318d78a JB |
113 | } |
114 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
115 | ||
6c507cd0 JB |
116 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
117 | int freq) | |
906c730a | 118 | { |
57fbcce3 | 119 | enum nl80211_band band; |
906c730a JB |
120 | struct ieee80211_supported_band *sband; |
121 | int i; | |
122 | ||
57fbcce3 | 123 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
906c730a JB |
124 | sband = wiphy->bands[band]; |
125 | ||
126 | if (!sband) | |
127 | continue; | |
128 | ||
129 | for (i = 0; i < sband->n_channels; i++) { | |
130 | if (sband->channels[i].center_freq == freq) | |
131 | return &sband->channels[i]; | |
132 | } | |
133 | } | |
134 | ||
135 | return NULL; | |
136 | } | |
6c507cd0 | 137 | EXPORT_SYMBOL(__ieee80211_get_channel); |
906c730a | 138 | |
8318d78a | 139 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
57fbcce3 | 140 | enum nl80211_band band) |
8318d78a JB |
141 | { |
142 | int i, want; | |
143 | ||
144 | switch (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: |
8318d78a JB |
194 | WARN_ON(1); |
195 | break; | |
196 | } | |
197 | } | |
198 | ||
199 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
200 | { | |
57fbcce3 | 201 | enum nl80211_band band; |
8318d78a | 202 | |
57fbcce3 | 203 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
8318d78a JB |
204 | if (wiphy->bands[band]) |
205 | set_mandatory_flags_band(wiphy->bands[band], band); | |
206 | } | |
08645126 | 207 | |
38ba3c57 JM |
208 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
209 | { | |
210 | int i; | |
211 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
212 | if (cipher == wiphy->cipher_suites[i]) | |
213 | return true; | |
214 | return false; | |
215 | } | |
216 | ||
fffd0934 JB |
217 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
218 | struct key_params *params, int key_idx, | |
e31b8213 | 219 | bool pairwise, const u8 *mac_addr) |
08645126 JB |
220 | { |
221 | if (key_idx > 5) | |
222 | return -EINVAL; | |
223 | ||
e31b8213 JB |
224 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
225 | return -EINVAL; | |
226 | ||
227 | if (pairwise && !mac_addr) | |
228 | return -EINVAL; | |
229 | ||
37720569 JM |
230 | switch (params->cipher) { |
231 | case WLAN_CIPHER_SUITE_TKIP: | |
232 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
233 | case WLAN_CIPHER_SUITE_CCMP_256: |
234 | case WLAN_CIPHER_SUITE_GCMP: | |
235 | case WLAN_CIPHER_SUITE_GCMP_256: | |
37720569 JM |
236 | /* Disallow pairwise keys with non-zero index unless it's WEP |
237 | * or a vendor specific cipher (because current deployments use | |
238 | * pairwise WEP keys with non-zero indices and for vendor | |
239 | * specific ciphers this should be validated in the driver or | |
240 | * hardware level - but 802.11i clearly specifies to use zero) | |
241 | */ | |
242 | if (pairwise && key_idx) | |
243 | return -EINVAL; | |
244 | break; | |
245 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
cfcf1682 JM |
246 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
247 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
248 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
37720569 JM |
249 | /* Disallow BIP (group-only) cipher as pairwise cipher */ |
250 | if (pairwise) | |
251 | return -EINVAL; | |
252 | break; | |
253 | default: | |
254 | break; | |
255 | } | |
08645126 | 256 | |
08645126 JB |
257 | switch (params->cipher) { |
258 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 259 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
260 | return -EINVAL; |
261 | break; | |
262 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 263 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
264 | return -EINVAL; |
265 | break; | |
266 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 267 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
268 | return -EINVAL; |
269 | break; | |
cfcf1682 JM |
270 | case WLAN_CIPHER_SUITE_CCMP_256: |
271 | if (params->key_len != WLAN_KEY_LEN_CCMP_256) | |
272 | return -EINVAL; | |
273 | break; | |
274 | case WLAN_CIPHER_SUITE_GCMP: | |
275 | if (params->key_len != WLAN_KEY_LEN_GCMP) | |
276 | return -EINVAL; | |
277 | break; | |
278 | case WLAN_CIPHER_SUITE_GCMP_256: | |
279 | if (params->key_len != WLAN_KEY_LEN_GCMP_256) | |
280 | return -EINVAL; | |
281 | break; | |
08645126 | 282 | case WLAN_CIPHER_SUITE_WEP104: |
8fc0fee0 | 283 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
284 | return -EINVAL; |
285 | break; | |
286 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 287 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
288 | return -EINVAL; |
289 | break; | |
cfcf1682 JM |
290 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
291 | if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) | |
292 | return -EINVAL; | |
293 | break; | |
294 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
295 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) | |
296 | return -EINVAL; | |
297 | break; | |
298 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
299 | if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) | |
300 | return -EINVAL; | |
301 | break; | |
08645126 | 302 | default: |
7d64b7cc JB |
303 | /* |
304 | * We don't know anything about this algorithm, | |
305 | * allow using it -- but the driver must check | |
306 | * all parameters! We still check below whether | |
307 | * or not the driver supports this algorithm, | |
308 | * of course. | |
309 | */ | |
310 | break; | |
08645126 JB |
311 | } |
312 | ||
9f26a952 JM |
313 | if (params->seq) { |
314 | switch (params->cipher) { | |
315 | case WLAN_CIPHER_SUITE_WEP40: | |
316 | case WLAN_CIPHER_SUITE_WEP104: | |
317 | /* These ciphers do not use key sequence */ | |
318 | return -EINVAL; | |
319 | case WLAN_CIPHER_SUITE_TKIP: | |
320 | case WLAN_CIPHER_SUITE_CCMP: | |
cfcf1682 JM |
321 | case WLAN_CIPHER_SUITE_CCMP_256: |
322 | case WLAN_CIPHER_SUITE_GCMP: | |
323 | case WLAN_CIPHER_SUITE_GCMP_256: | |
9f26a952 | 324 | case WLAN_CIPHER_SUITE_AES_CMAC: |
cfcf1682 JM |
325 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
326 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
327 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
9f26a952 JM |
328 | if (params->seq_len != 6) |
329 | return -EINVAL; | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
38ba3c57 | 334 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
335 | return -EINVAL; |
336 | ||
08645126 JB |
337 | return 0; |
338 | } | |
e31a16d6 | 339 | |
633adf1a | 340 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
341 | { |
342 | unsigned int hdrlen = 24; | |
343 | ||
344 | if (ieee80211_is_data(fc)) { | |
345 | if (ieee80211_has_a4(fc)) | |
346 | hdrlen = 30; | |
d0dd2de0 | 347 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 348 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
349 | if (ieee80211_has_order(fc)) |
350 | hdrlen += IEEE80211_HT_CTL_LEN; | |
351 | } | |
e31a16d6 ZY |
352 | goto out; |
353 | } | |
354 | ||
fb142f4b FC |
355 | if (ieee80211_is_mgmt(fc)) { |
356 | if (ieee80211_has_order(fc)) | |
357 | hdrlen += IEEE80211_HT_CTL_LEN; | |
358 | goto out; | |
359 | } | |
360 | ||
e31a16d6 ZY |
361 | if (ieee80211_is_ctl(fc)) { |
362 | /* | |
363 | * ACK and CTS are 10 bytes, all others 16. To see how | |
364 | * to get this condition consider | |
365 | * subtype mask: 0b0000000011110000 (0x00F0) | |
366 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
367 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
368 | * bits that matter: ^^^ (0x00E0) | |
369 | * value of those: 0b0000000011000000 (0x00C0) | |
370 | */ | |
371 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
372 | hdrlen = 10; | |
373 | else | |
374 | hdrlen = 16; | |
375 | } | |
376 | out: | |
377 | return hdrlen; | |
378 | } | |
379 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
380 | ||
381 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
382 | { | |
383 | const struct ieee80211_hdr *hdr = | |
384 | (const struct ieee80211_hdr *)skb->data; | |
385 | unsigned int hdrlen; | |
386 | ||
387 | if (unlikely(skb->len < 10)) | |
388 | return 0; | |
389 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
390 | if (unlikely(hdrlen > skb->len)) | |
391 | return 0; | |
392 | return hdrlen; | |
393 | } | |
394 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
395 | ||
2d1c304c | 396 | static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) |
e31a16d6 | 397 | { |
2d1c304c | 398 | int ae = flags & MESH_FLAGS_AE; |
7dd111e8 | 399 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 400 | switch (ae) { |
7dd111e8 | 401 | default: |
e31a16d6 ZY |
402 | case 0: |
403 | return 6; | |
3c5772a5 | 404 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 405 | return 12; |
3c5772a5 | 406 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 407 | return 18; |
e31a16d6 ZY |
408 | } |
409 | } | |
2d1c304c FF |
410 | |
411 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) | |
412 | { | |
413 | return __ieee80211_get_mesh_hdrlen(meshhdr->flags); | |
414 | } | |
9b395bc3 | 415 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 416 | |
2d1c304c FF |
417 | static int __ieee80211_data_to_8023(struct sk_buff *skb, struct ethhdr *ehdr, |
418 | const u8 *addr, enum nl80211_iftype iftype) | |
e31a16d6 ZY |
419 | { |
420 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2d1c304c FF |
421 | struct { |
422 | u8 hdr[ETH_ALEN] __aligned(2); | |
423 | __be16 proto; | |
424 | } payload; | |
425 | struct ethhdr tmp; | |
426 | u16 hdrlen; | |
427 | u8 mesh_flags = 0; | |
e31a16d6 ZY |
428 | |
429 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
430 | return -1; | |
431 | ||
432 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2d1c304c FF |
433 | if (skb->len < hdrlen + 8) |
434 | return -1; | |
e31a16d6 ZY |
435 | |
436 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
437 | * header | |
438 | * IEEE 802.11 address fields: | |
439 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
440 | * 0 0 DA SA BSSID n/a | |
441 | * 0 1 DA BSSID SA n/a | |
442 | * 1 0 BSSID SA DA n/a | |
443 | * 1 1 RA TA DA SA | |
444 | */ | |
2d1c304c FF |
445 | memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); |
446 | memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); | |
447 | ||
448 | if (iftype == NL80211_IFTYPE_MESH_POINT) | |
449 | skb_copy_bits(skb, hdrlen, &mesh_flags, 1); | |
e31a16d6 ZY |
450 | |
451 | switch (hdr->frame_control & | |
452 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
453 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
454 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
455 | iftype != NL80211_IFTYPE_AP_VLAN && |
456 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
457 | return -1; |
458 | break; | |
459 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
460 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
461 | iftype != NL80211_IFTYPE_MESH_POINT && |
462 | iftype != NL80211_IFTYPE_AP_VLAN && | |
463 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
464 | return -1; |
465 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
2d1c304c | 466 | if (mesh_flags & MESH_FLAGS_AE_A4) |
e3cf8b3f | 467 | return -1; |
2d1c304c | 468 | if (mesh_flags & MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
469 | skb_copy_bits(skb, hdrlen + |
470 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c | 471 | tmp.h_dest, 2 * ETH_ALEN); |
e31a16d6 | 472 | } |
2d1c304c | 473 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); |
e31a16d6 ZY |
474 | } |
475 | break; | |
476 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 477 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
478 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
479 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
2d1c304c FF |
480 | (is_multicast_ether_addr(tmp.h_dest) && |
481 | ether_addr_equal(tmp.h_source, addr))) | |
e31a16d6 | 482 | return -1; |
3c5772a5 | 483 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
2d1c304c | 484 | if (mesh_flags & MESH_FLAGS_AE_A5_A6) |
7dd111e8 | 485 | return -1; |
2d1c304c | 486 | if (mesh_flags & MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
487 | skb_copy_bits(skb, hdrlen + |
488 | offsetof(struct ieee80211s_hdr, eaddr1), | |
2d1c304c FF |
489 | tmp.h_source, ETH_ALEN); |
490 | hdrlen += __ieee80211_get_mesh_hdrlen(mesh_flags); | |
3c5772a5 | 491 | } |
e31a16d6 ZY |
492 | break; |
493 | case cpu_to_le16(0): | |
941c93cd | 494 | if (iftype != NL80211_IFTYPE_ADHOC && |
6e0bd6c3 RL |
495 | iftype != NL80211_IFTYPE_STATION && |
496 | iftype != NL80211_IFTYPE_OCB) | |
941c93cd | 497 | return -1; |
e31a16d6 ZY |
498 | break; |
499 | } | |
500 | ||
2d1c304c FF |
501 | skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)); |
502 | tmp.h_proto = payload.proto; | |
e31a16d6 | 503 | |
2d1c304c FF |
504 | if (likely((ether_addr_equal(payload.hdr, rfc1042_header) && |
505 | tmp.h_proto != htons(ETH_P_AARP) && | |
506 | tmp.h_proto != htons(ETH_P_IPX)) || | |
507 | ether_addr_equal(payload.hdr, bridge_tunnel_header))) | |
e31a16d6 ZY |
508 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
509 | * replace EtherType */ | |
2d1c304c FF |
510 | hdrlen += ETH_ALEN + 2; |
511 | else | |
512 | tmp.h_proto = htons(skb->len); | |
513 | ||
514 | pskb_pull(skb, hdrlen); | |
e31a16d6 | 515 | |
2d1c304c | 516 | if (!ehdr) |
e31a16d6 | 517 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); |
2d1c304c FF |
518 | memcpy(ehdr, &tmp, sizeof(tmp)); |
519 | ||
e31a16d6 ZY |
520 | return 0; |
521 | } | |
2d1c304c FF |
522 | |
523 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, | |
524 | enum nl80211_iftype iftype) | |
525 | { | |
526 | return __ieee80211_data_to_8023(skb, NULL, addr, iftype); | |
527 | } | |
e31a16d6 ZY |
528 | EXPORT_SYMBOL(ieee80211_data_to_8023); |
529 | ||
eaf85ca7 | 530 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
c1e5f471 JB |
531 | enum nl80211_iftype iftype, |
532 | const u8 *bssid, bool qos) | |
e31a16d6 ZY |
533 | { |
534 | struct ieee80211_hdr hdr; | |
535 | u16 hdrlen, ethertype; | |
536 | __le16 fc; | |
537 | const u8 *encaps_data; | |
538 | int encaps_len, skip_header_bytes; | |
539 | int nh_pos, h_pos; | |
540 | int head_need; | |
541 | ||
542 | if (unlikely(skb->len < ETH_HLEN)) | |
543 | return -EINVAL; | |
544 | ||
545 | nh_pos = skb_network_header(skb) - skb->data; | |
546 | h_pos = skb_transport_header(skb) - skb->data; | |
547 | ||
548 | /* convert Ethernet header to proper 802.11 header (based on | |
549 | * operation mode) */ | |
550 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
551 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
552 | ||
553 | switch (iftype) { | |
554 | case NL80211_IFTYPE_AP: | |
555 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 556 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
557 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
558 | /* DA BSSID SA */ | |
559 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
560 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
561 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
562 | hdrlen = 24; | |
563 | break; | |
564 | case NL80211_IFTYPE_STATION: | |
074ac8df | 565 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
566 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
567 | /* BSSID SA DA */ | |
568 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
569 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
570 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
571 | hdrlen = 24; | |
572 | break; | |
6e0bd6c3 | 573 | case NL80211_IFTYPE_OCB: |
e31a16d6 ZY |
574 | case NL80211_IFTYPE_ADHOC: |
575 | /* DA SA BSSID */ | |
576 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
577 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
578 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
579 | hdrlen = 24; | |
580 | break; | |
581 | default: | |
582 | return -EOPNOTSUPP; | |
583 | } | |
584 | ||
585 | if (qos) { | |
586 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
587 | hdrlen += 2; | |
588 | } | |
589 | ||
590 | hdr.frame_control = fc; | |
591 | hdr.duration_id = 0; | |
592 | hdr.seq_ctrl = 0; | |
593 | ||
594 | skip_header_bytes = ETH_HLEN; | |
595 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
596 | encaps_data = bridge_tunnel_header; | |
597 | encaps_len = sizeof(bridge_tunnel_header); | |
598 | skip_header_bytes -= 2; | |
e5c5d22e | 599 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e31a16d6 ZY |
600 | encaps_data = rfc1042_header; |
601 | encaps_len = sizeof(rfc1042_header); | |
602 | skip_header_bytes -= 2; | |
603 | } else { | |
604 | encaps_data = NULL; | |
605 | encaps_len = 0; | |
606 | } | |
607 | ||
608 | skb_pull(skb, skip_header_bytes); | |
609 | nh_pos -= skip_header_bytes; | |
610 | h_pos -= skip_header_bytes; | |
611 | ||
612 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
613 | ||
614 | if (head_need > 0 || skb_cloned(skb)) { | |
615 | head_need = max(head_need, 0); | |
616 | if (head_need) | |
617 | skb_orphan(skb); | |
618 | ||
24616152 | 619 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 620 | return -ENOMEM; |
24616152 | 621 | |
e31a16d6 ZY |
622 | skb->truesize += head_need; |
623 | } | |
624 | ||
625 | if (encaps_data) { | |
626 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
627 | nh_pos += encaps_len; | |
628 | h_pos += encaps_len; | |
629 | } | |
630 | ||
631 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
632 | ||
633 | nh_pos += hdrlen; | |
634 | h_pos += hdrlen; | |
635 | ||
636 | /* Update skb pointers to various headers since this modified frame | |
637 | * is going to go through Linux networking code that may potentially | |
638 | * need things like pointer to IP header. */ | |
3ef523ae | 639 | skb_reset_mac_header(skb); |
e31a16d6 ZY |
640 | skb_set_network_header(skb, nh_pos); |
641 | skb_set_transport_header(skb, h_pos); | |
642 | ||
643 | return 0; | |
644 | } | |
645 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
646 | ||
2b67f944 FF |
647 | static void |
648 | __frame_add_frag(struct sk_buff *skb, struct page *page, | |
649 | void *ptr, int len, int size) | |
650 | { | |
651 | struct skb_shared_info *sh = skb_shinfo(skb); | |
652 | int page_offset; | |
653 | ||
6d061f9f | 654 | page_ref_inc(page); |
2b67f944 FF |
655 | page_offset = ptr - page_address(page); |
656 | skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); | |
657 | } | |
658 | ||
659 | static void | |
660 | __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, | |
661 | int offset, int len) | |
662 | { | |
663 | struct skb_shared_info *sh = skb_shinfo(skb); | |
664 | const skb_frag_t *frag = &sh->frags[-1]; | |
665 | struct page *frag_page; | |
666 | void *frag_ptr; | |
667 | int frag_len, frag_size; | |
668 | int head_size = skb->len - skb->data_len; | |
669 | int cur_len; | |
670 | ||
671 | frag_page = virt_to_head_page(skb->head); | |
672 | frag_ptr = skb->data; | |
673 | frag_size = head_size; | |
674 | ||
675 | while (offset >= frag_size) { | |
676 | offset -= frag_size; | |
677 | frag++; | |
678 | frag_page = skb_frag_page(frag); | |
679 | frag_ptr = skb_frag_address(frag); | |
680 | frag_size = skb_frag_size(frag); | |
681 | } | |
682 | ||
683 | frag_ptr += offset; | |
684 | frag_len = frag_size - offset; | |
685 | ||
686 | cur_len = min(len, frag_len); | |
687 | ||
688 | __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); | |
689 | len -= cur_len; | |
690 | ||
691 | while (len > 0) { | |
692 | frag++; | |
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; | |
698 | } | |
699 | } | |
700 | ||
230fd28a FF |
701 | static struct sk_buff * |
702 | __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, | |
2b67f944 | 703 | int offset, int len, bool reuse_frag) |
230fd28a FF |
704 | { |
705 | struct sk_buff *frame; | |
2b67f944 | 706 | int cur_len = len; |
230fd28a FF |
707 | |
708 | if (skb->len - offset < len) | |
709 | return NULL; | |
710 | ||
2b67f944 FF |
711 | /* |
712 | * When reusing framents, copy some data to the head to simplify | |
713 | * ethernet header handling and speed up protocol header processing | |
714 | * in the stack later. | |
715 | */ | |
716 | if (reuse_frag) | |
717 | cur_len = min_t(int, len, 32); | |
718 | ||
230fd28a FF |
719 | /* |
720 | * Allocate and reserve two bytes more for payload | |
721 | * alignment since sizeof(struct ethhdr) is 14. | |
722 | */ | |
2b67f944 | 723 | frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); |
230fd28a FF |
724 | |
725 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
2b67f944 FF |
726 | skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); |
727 | ||
728 | len -= cur_len; | |
729 | if (!len) | |
730 | return frame; | |
731 | ||
732 | offset += cur_len; | |
733 | __ieee80211_amsdu_copy_frag(skb, frame, offset, len); | |
230fd28a FF |
734 | |
735 | return frame; | |
736 | } | |
eaf85ca7 ZY |
737 | |
738 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
739 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad YAP |
740 | const unsigned int extra_headroom, |
741 | bool has_80211_header) | |
eaf85ca7 | 742 | { |
230fd28a | 743 | unsigned int hlen = ALIGN(extra_headroom, 4); |
eaf85ca7 ZY |
744 | struct sk_buff *frame = NULL; |
745 | u16 ethertype; | |
746 | u8 *payload; | |
230fd28a FF |
747 | int offset = 0, remaining, err; |
748 | struct ethhdr eth; | |
2b67f944 | 749 | bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); |
2bf0ccc7 | 750 | bool reuse_skb = false; |
230fd28a | 751 | bool last = false; |
88665f5a | 752 | |
8b3becad | 753 | if (has_80211_header) { |
230fd28a | 754 | err = __ieee80211_data_to_8023(skb, ð, addr, iftype); |
8b3becad YAP |
755 | if (err) |
756 | goto out; | |
8b3becad | 757 | } |
eaf85ca7 | 758 | |
230fd28a FF |
759 | while (!last) { |
760 | unsigned int subframe_len; | |
761 | int len; | |
eaf85ca7 | 762 | u8 padding; |
eaf85ca7 | 763 | |
230fd28a FF |
764 | skb_copy_bits(skb, offset, ð, sizeof(eth)); |
765 | len = ntohs(eth.h_proto); | |
766 | subframe_len = sizeof(struct ethhdr) + len; | |
eaf85ca7 | 767 | padding = (4 - subframe_len) & 0x3; |
230fd28a | 768 | |
eaf85ca7 | 769 | /* the last MSDU has no padding */ |
230fd28a | 770 | remaining = skb->len - offset; |
eaf85ca7 ZY |
771 | if (subframe_len > remaining) |
772 | goto purge; | |
773 | ||
230fd28a | 774 | offset += sizeof(struct ethhdr); |
eaf85ca7 | 775 | /* reuse skb for the last subframe */ |
230fd28a | 776 | last = remaining <= subframe_len + padding; |
2b67f944 | 777 | if (!skb_is_nonlinear(skb) && !reuse_frag && last) { |
230fd28a | 778 | skb_pull(skb, offset); |
eaf85ca7 | 779 | frame = skb; |
230fd28a FF |
780 | reuse_skb = true; |
781 | } else { | |
2b67f944 FF |
782 | frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, |
783 | reuse_frag); | |
eaf85ca7 ZY |
784 | if (!frame) |
785 | goto purge; | |
786 | ||
230fd28a | 787 | offset += len + padding; |
eaf85ca7 ZY |
788 | } |
789 | ||
790 | skb_reset_network_header(frame); | |
791 | frame->dev = skb->dev; | |
792 | frame->priority = skb->priority; | |
793 | ||
794 | payload = frame->data; | |
795 | ethertype = (payload[6] << 8) | payload[7]; | |
ac422d3c | 796 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 797 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 798 | ether_addr_equal(payload, bridge_tunnel_header))) { |
230fd28a FF |
799 | eth.h_proto = htons(ethertype); |
800 | skb_pull(frame, ETH_ALEN + 2); | |
eaf85ca7 | 801 | } |
230fd28a FF |
802 | |
803 | memcpy(skb_push(frame, sizeof(eth)), ð, sizeof(eth)); | |
eaf85ca7 ZY |
804 | __skb_queue_tail(list, frame); |
805 | } | |
806 | ||
230fd28a FF |
807 | if (!reuse_skb) |
808 | dev_kfree_skb(skb); | |
809 | ||
eaf85ca7 ZY |
810 | return; |
811 | ||
812 | purge: | |
813 | __skb_queue_purge(list); | |
814 | out: | |
815 | dev_kfree_skb(skb); | |
816 | } | |
817 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
818 | ||
e31a16d6 | 819 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
820 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
821 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
822 | { |
823 | unsigned int dscp; | |
c6ca5e28 | 824 | unsigned char vlan_priority; |
e31a16d6 ZY |
825 | |
826 | /* skb->priority values from 256->263 are magic values to | |
827 | * directly indicate a specific 802.1d priority. This is used | |
828 | * to allow 802.1d priority to be passed directly in from VLAN | |
829 | * tags, etc. | |
830 | */ | |
831 | if (skb->priority >= 256 && skb->priority <= 263) | |
832 | return skb->priority - 256; | |
833 | ||
df8a39de JP |
834 | if (skb_vlan_tag_present(skb)) { |
835 | vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) | |
c6ca5e28 V |
836 | >> VLAN_PRIO_SHIFT; |
837 | if (vlan_priority > 0) | |
838 | return vlan_priority; | |
839 | } | |
840 | ||
e31a16d6 ZY |
841 | switch (skb->protocol) { |
842 | case htons(ETH_P_IP): | |
b156579b DT |
843 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
844 | break; | |
845 | case htons(ETH_P_IPV6): | |
846 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 847 | break; |
960d97f9 SW |
848 | case htons(ETH_P_MPLS_UC): |
849 | case htons(ETH_P_MPLS_MC): { | |
850 | struct mpls_label mpls_tmp, *mpls; | |
851 | ||
852 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
853 | sizeof(*mpls), &mpls_tmp); | |
854 | if (!mpls) | |
855 | return 0; | |
856 | ||
857 | return (ntohl(mpls->entry) & MPLS_LS_TC_MASK) | |
858 | >> MPLS_LS_TC_SHIFT; | |
859 | } | |
860 | case htons(ETH_P_80221): | |
861 | /* 802.21 is always network control traffic */ | |
862 | return 7; | |
e31a16d6 ZY |
863 | default: |
864 | return 0; | |
865 | } | |
866 | ||
fa9ffc74 KP |
867 | if (qos_map) { |
868 | unsigned int i, tmp_dscp = dscp >> 2; | |
869 | ||
870 | for (i = 0; i < qos_map->num_des; i++) { | |
871 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) | |
872 | return qos_map->dscp_exception[i].up; | |
873 | } | |
874 | ||
875 | for (i = 0; i < 8; i++) { | |
876 | if (tmp_dscp >= qos_map->up[i].low && | |
877 | tmp_dscp <= qos_map->up[i].high) | |
878 | return i; | |
879 | } | |
880 | } | |
881 | ||
e31a16d6 ZY |
882 | return dscp >> 5; |
883 | } | |
884 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
885 | |
886 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
887 | { | |
9caf0364 JB |
888 | const struct cfg80211_bss_ies *ies; |
889 | ||
890 | ies = rcu_dereference(bss->ies); | |
891 | if (!ies) | |
517357c6 | 892 | return NULL; |
9caf0364 JB |
893 | |
894 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
895 | } |
896 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
897 | |
898 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
899 | { | |
f26cbf40 | 900 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
901 | struct net_device *dev = wdev->netdev; |
902 | int i; | |
903 | ||
904 | if (!wdev->connect_keys) | |
905 | return; | |
906 | ||
907 | for (i = 0; i < 6; i++) { | |
908 | if (!wdev->connect_keys->params[i].cipher) | |
909 | continue; | |
e35e4d28 HG |
910 | if (rdev_add_key(rdev, dev, i, false, NULL, |
911 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 912 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
913 | continue; |
914 | } | |
fffd0934 | 915 | if (wdev->connect_keys->def == i) |
e35e4d28 | 916 | if (rdev_set_default_key(rdev, dev, i, true, true)) { |
e9c0268f | 917 | netdev_err(dev, "failed to set defkey %d\n", i); |
1e056665 ZY |
918 | continue; |
919 | } | |
fffd0934 | 920 | if (wdev->connect_keys->defmgmt == i) |
e35e4d28 | 921 | if (rdev_set_default_mgmt_key(rdev, dev, i)) |
e9c0268f | 922 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
fffd0934 JB |
923 | } |
924 | ||
b47f610b | 925 | kzfree(wdev->connect_keys); |
fffd0934 JB |
926 | wdev->connect_keys = NULL; |
927 | } | |
3d54d255 | 928 | |
1f6fc43e | 929 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
930 | { |
931 | struct cfg80211_event *ev; | |
932 | unsigned long flags; | |
933 | const u8 *bssid = NULL; | |
934 | ||
935 | spin_lock_irqsave(&wdev->event_lock, flags); | |
936 | while (!list_empty(&wdev->event_list)) { | |
937 | ev = list_first_entry(&wdev->event_list, | |
938 | struct cfg80211_event, list); | |
939 | list_del(&ev->list); | |
940 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
941 | ||
942 | wdev_lock(wdev); | |
943 | switch (ev->type) { | |
944 | case EVENT_CONNECT_RESULT: | |
945 | if (!is_zero_ether_addr(ev->cr.bssid)) | |
946 | bssid = ev->cr.bssid; | |
947 | __cfg80211_connect_result( | |
948 | wdev->netdev, bssid, | |
949 | ev->cr.req_ie, ev->cr.req_ie_len, | |
950 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
951 | ev->cr.status, | |
952 | ev->cr.status == WLAN_STATUS_SUCCESS, | |
e7054989 | 953 | ev->cr.bss); |
3d54d255 JB |
954 | break; |
955 | case EVENT_ROAMED: | |
adbde344 VT |
956 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
957 | ev->rm.req_ie_len, ev->rm.resp_ie, | |
958 | ev->rm.resp_ie_len); | |
3d54d255 JB |
959 | break; |
960 | case EVENT_DISCONNECTED: | |
961 | __cfg80211_disconnected(wdev->netdev, | |
962 | ev->dc.ie, ev->dc.ie_len, | |
80279fb7 JB |
963 | ev->dc.reason, |
964 | !ev->dc.locally_generated); | |
3d54d255 JB |
965 | break; |
966 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
967 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
968 | ev->ij.channel); | |
3d54d255 | 969 | break; |
f04c2203 MK |
970 | case EVENT_STOPPED: |
971 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
972 | break; | |
3d54d255 JB |
973 | } |
974 | wdev_unlock(wdev); | |
975 | ||
976 | kfree(ev); | |
977 | ||
978 | spin_lock_irqsave(&wdev->event_lock, flags); | |
979 | } | |
980 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
981 | } | |
982 | ||
983 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
984 | { | |
985 | struct wireless_dev *wdev; | |
986 | ||
987 | ASSERT_RTNL(); | |
3d54d255 | 988 | |
53873f13 | 989 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
3d54d255 | 990 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
991 | } |
992 | ||
993 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
994 | struct net_device *dev, enum nl80211_iftype ntype, | |
995 | u32 *flags, struct vif_params *params) | |
996 | { | |
997 | int err; | |
998 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
999 | ||
73fb08e2 | 1000 | ASSERT_RTNL(); |
3d54d255 JB |
1001 | |
1002 | /* don't support changing VLANs, you just re-create them */ | |
1003 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
1004 | return -EOPNOTSUPP; | |
1005 | ||
98104fde JB |
1006 | /* cannot change into P2P device type */ |
1007 | if (ntype == NL80211_IFTYPE_P2P_DEVICE) | |
1008 | return -EOPNOTSUPP; | |
1009 | ||
3d54d255 JB |
1010 | if (!rdev->ops->change_virtual_intf || |
1011 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
1012 | return -EOPNOTSUPP; | |
1013 | ||
ad4bb6f8 | 1014 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 1015 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
1016 | (ntype == NL80211_IFTYPE_ADHOC || |
1017 | ntype == NL80211_IFTYPE_STATION || | |
1018 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
1019 | return -EBUSY; |
1020 | ||
6cbfb1bb | 1021 | if (ntype != otype) { |
9bc383de | 1022 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 1023 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 1024 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 1025 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 1026 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 1027 | |
3d54d255 | 1028 | switch (otype) { |
ac800140 | 1029 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 1030 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 1031 | break; |
3d54d255 JB |
1032 | case NL80211_IFTYPE_ADHOC: |
1033 | cfg80211_leave_ibss(rdev, dev, false); | |
1034 | break; | |
1035 | case NL80211_IFTYPE_STATION: | |
074ac8df | 1036 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 1037 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
1038 | cfg80211_disconnect(rdev, dev, |
1039 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 1040 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
1041 | break; |
1042 | case NL80211_IFTYPE_MESH_POINT: | |
1043 | /* mesh should be handled? */ | |
1044 | break; | |
1045 | default: | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | cfg80211_process_rdev_events(rdev); | |
1050 | } | |
1051 | ||
e35e4d28 | 1052 | err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
3d54d255 JB |
1053 | |
1054 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
1055 | ||
9bc383de JB |
1056 | if (!err && params && params->use_4addr != -1) |
1057 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
1058 | ||
ad4bb6f8 JB |
1059 | if (!err) { |
1060 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
1061 | switch (ntype) { | |
1062 | case NL80211_IFTYPE_STATION: | |
1063 | if (dev->ieee80211_ptr->use_4addr) | |
1064 | break; | |
1065 | /* fall through */ | |
6e0bd6c3 | 1066 | case NL80211_IFTYPE_OCB: |
074ac8df | 1067 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
1068 | case NL80211_IFTYPE_ADHOC: |
1069 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
1070 | break; | |
074ac8df | 1071 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
1072 | case NL80211_IFTYPE_AP: |
1073 | case NL80211_IFTYPE_AP_VLAN: | |
1074 | case NL80211_IFTYPE_WDS: | |
1075 | case NL80211_IFTYPE_MESH_POINT: | |
1076 | /* bridging OK */ | |
1077 | break; | |
1078 | case NL80211_IFTYPE_MONITOR: | |
1079 | /* monitor can't bridge anyway */ | |
1080 | break; | |
1081 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 1082 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
1083 | /* not happening */ |
1084 | break; | |
98104fde JB |
1085 | case NL80211_IFTYPE_P2P_DEVICE: |
1086 | WARN_ON(1); | |
1087 | break; | |
ad4bb6f8 JB |
1088 | } |
1089 | } | |
1090 | ||
dbbae26a MK |
1091 | if (!err && ntype != otype && netif_running(dev)) { |
1092 | cfg80211_update_iface_num(rdev, ntype, 1); | |
1093 | cfg80211_update_iface_num(rdev, otype, -1); | |
1094 | } | |
1095 | ||
3d54d255 JB |
1096 | return err; |
1097 | } | |
254416aa | 1098 | |
95ddc1fc VK |
1099 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
1100 | { | |
1101 | static const u32 __mcs2bitrate[] = { | |
1102 | /* control PHY */ | |
1103 | [0] = 275, | |
1104 | /* SC PHY */ | |
1105 | [1] = 3850, | |
1106 | [2] = 7700, | |
1107 | [3] = 9625, | |
1108 | [4] = 11550, | |
1109 | [5] = 12512, /* 1251.25 mbps */ | |
1110 | [6] = 15400, | |
1111 | [7] = 19250, | |
1112 | [8] = 23100, | |
1113 | [9] = 25025, | |
1114 | [10] = 30800, | |
1115 | [11] = 38500, | |
1116 | [12] = 46200, | |
1117 | /* OFDM PHY */ | |
1118 | [13] = 6930, | |
1119 | [14] = 8662, /* 866.25 mbps */ | |
1120 | [15] = 13860, | |
1121 | [16] = 17325, | |
1122 | [17] = 20790, | |
1123 | [18] = 27720, | |
1124 | [19] = 34650, | |
1125 | [20] = 41580, | |
1126 | [21] = 45045, | |
1127 | [22] = 51975, | |
1128 | [23] = 62370, | |
1129 | [24] = 67568, /* 6756.75 mbps */ | |
1130 | /* LP-SC PHY */ | |
1131 | [25] = 6260, | |
1132 | [26] = 8340, | |
1133 | [27] = 11120, | |
1134 | [28] = 12510, | |
1135 | [29] = 16680, | |
1136 | [30] = 22240, | |
1137 | [31] = 25030, | |
1138 | }; | |
1139 | ||
1140 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1141 | return 0; | |
1142 | ||
1143 | return __mcs2bitrate[rate->mcs]; | |
1144 | } | |
1145 | ||
db9c64cf JB |
1146 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1147 | { | |
1148 | static const u32 base[4][10] = { | |
1149 | { 6500000, | |
1150 | 13000000, | |
1151 | 19500000, | |
1152 | 26000000, | |
1153 | 39000000, | |
1154 | 52000000, | |
1155 | 58500000, | |
1156 | 65000000, | |
1157 | 78000000, | |
1158 | 0, | |
1159 | }, | |
1160 | { 13500000, | |
1161 | 27000000, | |
1162 | 40500000, | |
1163 | 54000000, | |
1164 | 81000000, | |
1165 | 108000000, | |
1166 | 121500000, | |
1167 | 135000000, | |
1168 | 162000000, | |
1169 | 180000000, | |
1170 | }, | |
1171 | { 29300000, | |
1172 | 58500000, | |
1173 | 87800000, | |
1174 | 117000000, | |
1175 | 175500000, | |
1176 | 234000000, | |
1177 | 263300000, | |
1178 | 292500000, | |
1179 | 351000000, | |
1180 | 390000000, | |
1181 | }, | |
1182 | { 58500000, | |
1183 | 117000000, | |
1184 | 175500000, | |
1185 | 234000000, | |
1186 | 351000000, | |
1187 | 468000000, | |
1188 | 526500000, | |
1189 | 585000000, | |
1190 | 702000000, | |
1191 | 780000000, | |
1192 | }, | |
1193 | }; | |
1194 | u32 bitrate; | |
1195 | int idx; | |
1196 | ||
1197 | if (WARN_ON_ONCE(rate->mcs > 9)) | |
1198 | return 0; | |
1199 | ||
b51f3bee JB |
1200 | switch (rate->bw) { |
1201 | case RATE_INFO_BW_160: | |
1202 | idx = 3; | |
1203 | break; | |
1204 | case RATE_INFO_BW_80: | |
1205 | idx = 2; | |
1206 | break; | |
1207 | case RATE_INFO_BW_40: | |
1208 | idx = 1; | |
1209 | break; | |
1210 | case RATE_INFO_BW_5: | |
1211 | case RATE_INFO_BW_10: | |
1212 | default: | |
1213 | WARN_ON(1); | |
1214 | /* fall through */ | |
1215 | case RATE_INFO_BW_20: | |
1216 | idx = 0; | |
1217 | } | |
db9c64cf JB |
1218 | |
1219 | bitrate = base[idx][rate->mcs]; | |
1220 | bitrate *= rate->nss; | |
1221 | ||
1222 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1223 | bitrate = (bitrate / 9) * 10; | |
1224 | ||
1225 | /* do NOT round down here */ | |
1226 | return (bitrate + 50000) / 100000; | |
1227 | } | |
1228 | ||
8eb41c8d | 1229 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa JL |
1230 | { |
1231 | int modulation, streams, bitrate; | |
1232 | ||
db9c64cf JB |
1233 | if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
1234 | !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) | |
254416aa | 1235 | return rate->legacy; |
95ddc1fc VK |
1236 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1237 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1238 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1239 | return cfg80211_calculate_bitrate_vht(rate); | |
254416aa JL |
1240 | |
1241 | /* the formula below does only work for MCS values smaller than 32 */ | |
2615f375 | 1242 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
254416aa JL |
1243 | return 0; |
1244 | ||
1245 | modulation = rate->mcs & 7; | |
1246 | streams = (rate->mcs >> 3) + 1; | |
1247 | ||
b51f3bee | 1248 | bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; |
254416aa JL |
1249 | |
1250 | if (modulation < 4) | |
1251 | bitrate *= (modulation + 1); | |
1252 | else if (modulation == 4) | |
1253 | bitrate *= (modulation + 2); | |
1254 | else | |
1255 | bitrate *= (modulation + 3); | |
1256 | ||
1257 | bitrate *= streams; | |
1258 | ||
1259 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1260 | bitrate = (bitrate / 9) * 10; | |
1261 | ||
1262 | /* do NOT round down here */ | |
1263 | return (bitrate + 50000) / 100000; | |
1264 | } | |
8097e149 | 1265 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1266 | |
c216e641 AS |
1267 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1268 | enum ieee80211_p2p_attr_id attr, | |
1269 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1270 | { |
1271 | u8 *out = buf; | |
1272 | u16 attr_remaining = 0; | |
1273 | bool desired_attr = false; | |
1274 | u16 desired_len = 0; | |
1275 | ||
1276 | while (len > 0) { | |
1277 | unsigned int iedatalen; | |
1278 | unsigned int copy; | |
1279 | const u8 *iedata; | |
1280 | ||
1281 | if (len < 2) | |
1282 | return -EILSEQ; | |
1283 | iedatalen = ies[1]; | |
1284 | if (iedatalen + 2 > len) | |
1285 | return -EILSEQ; | |
1286 | ||
1287 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1288 | goto cont; | |
1289 | ||
1290 | if (iedatalen < 4) | |
1291 | goto cont; | |
1292 | ||
1293 | iedata = ies + 2; | |
1294 | ||
1295 | /* check WFA OUI, P2P subtype */ | |
1296 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1297 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1298 | goto cont; | |
1299 | ||
1300 | iedatalen -= 4; | |
1301 | iedata += 4; | |
1302 | ||
1303 | /* check attribute continuation into this IE */ | |
1304 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1305 | if (copy && desired_attr) { | |
1306 | desired_len += copy; | |
1307 | if (out) { | |
1308 | memcpy(out, iedata, min(bufsize, copy)); | |
1309 | out += min(bufsize, copy); | |
1310 | bufsize -= min(bufsize, copy); | |
1311 | } | |
1312 | ||
1313 | ||
1314 | if (copy == attr_remaining) | |
1315 | return desired_len; | |
1316 | } | |
1317 | ||
1318 | attr_remaining -= copy; | |
1319 | if (attr_remaining) | |
1320 | goto cont; | |
1321 | ||
1322 | iedatalen -= copy; | |
1323 | iedata += copy; | |
1324 | ||
1325 | while (iedatalen > 0) { | |
1326 | u16 attr_len; | |
1327 | ||
1328 | /* P2P attribute ID & size must fit */ | |
1329 | if (iedatalen < 3) | |
1330 | return -EILSEQ; | |
1331 | desired_attr = iedata[0] == attr; | |
1332 | attr_len = get_unaligned_le16(iedata + 1); | |
1333 | iedatalen -= 3; | |
1334 | iedata += 3; | |
1335 | ||
1336 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1337 | ||
1338 | if (desired_attr) { | |
1339 | desired_len += copy; | |
1340 | if (out) { | |
1341 | memcpy(out, iedata, min(bufsize, copy)); | |
1342 | out += min(bufsize, copy); | |
1343 | bufsize -= min(bufsize, copy); | |
1344 | } | |
1345 | ||
1346 | if (copy == attr_len) | |
1347 | return desired_len; | |
1348 | } | |
1349 | ||
1350 | iedata += copy; | |
1351 | iedatalen -= copy; | |
1352 | attr_remaining = attr_len - copy; | |
1353 | } | |
1354 | ||
1355 | cont: | |
1356 | len -= ies[1] + 2; | |
1357 | ies += ies[1] + 2; | |
1358 | } | |
1359 | ||
1360 | if (attr_remaining && desired_attr) | |
1361 | return -EILSEQ; | |
1362 | ||
1363 | return -ENOENT; | |
1364 | } | |
1365 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1366 | ||
29464ccc JB |
1367 | static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id) |
1368 | { | |
1369 | int i; | |
1370 | ||
1371 | for (i = 0; i < n_ids; i++) | |
1372 | if (ids[i] == id) | |
1373 | return true; | |
1374 | return false; | |
1375 | } | |
1376 | ||
1377 | size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, | |
1378 | const u8 *ids, int n_ids, | |
1379 | const u8 *after_ric, int n_after_ric, | |
1380 | size_t offset) | |
1381 | { | |
1382 | size_t pos = offset; | |
1383 | ||
1384 | while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) { | |
1385 | if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { | |
1386 | pos += 2 + ies[pos + 1]; | |
1387 | ||
1388 | while (pos < ielen && | |
1389 | !ieee80211_id_in_list(after_ric, n_after_ric, | |
1390 | ies[pos])) | |
1391 | pos += 2 + ies[pos + 1]; | |
1392 | } else { | |
1393 | pos += 2 + ies[pos + 1]; | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | return pos; | |
1398 | } | |
1399 | EXPORT_SYMBOL(ieee80211_ie_split_ric); | |
1400 | ||
1ce3e82b | 1401 | bool ieee80211_operating_class_to_band(u8 operating_class, |
57fbcce3 | 1402 | enum nl80211_band *band) |
1ce3e82b JB |
1403 | { |
1404 | switch (operating_class) { | |
1405 | case 112: | |
1406 | case 115 ... 127: | |
954a86ef | 1407 | case 128 ... 130: |
57fbcce3 | 1408 | *band = NL80211_BAND_5GHZ; |
1ce3e82b JB |
1409 | return true; |
1410 | case 81: | |
1411 | case 82: | |
1412 | case 83: | |
1413 | case 84: | |
57fbcce3 | 1414 | *band = NL80211_BAND_2GHZ; |
1ce3e82b | 1415 | return true; |
55300a13 | 1416 | case 180: |
57fbcce3 | 1417 | *band = NL80211_BAND_60GHZ; |
55300a13 | 1418 | return true; |
1ce3e82b JB |
1419 | } |
1420 | ||
1421 | return false; | |
1422 | } | |
1423 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1424 | ||
a38700dd AN |
1425 | bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, |
1426 | u8 *op_class) | |
1427 | { | |
1428 | u8 vht_opclass; | |
1429 | u16 freq = chandef->center_freq1; | |
1430 | ||
1431 | if (freq >= 2412 && freq <= 2472) { | |
1432 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1433 | return false; | |
1434 | ||
1435 | /* 2.407 GHz, channels 1..13 */ | |
1436 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1437 | if (freq > chandef->chan->center_freq) | |
1438 | *op_class = 83; /* HT40+ */ | |
1439 | else | |
1440 | *op_class = 84; /* HT40- */ | |
1441 | } else { | |
1442 | *op_class = 81; | |
1443 | } | |
1444 | ||
1445 | return true; | |
1446 | } | |
1447 | ||
1448 | if (freq == 2484) { | |
1449 | if (chandef->width > NL80211_CHAN_WIDTH_40) | |
1450 | return false; | |
1451 | ||
1452 | *op_class = 82; /* channel 14 */ | |
1453 | return true; | |
1454 | } | |
1455 | ||
1456 | switch (chandef->width) { | |
1457 | case NL80211_CHAN_WIDTH_80: | |
1458 | vht_opclass = 128; | |
1459 | break; | |
1460 | case NL80211_CHAN_WIDTH_160: | |
1461 | vht_opclass = 129; | |
1462 | break; | |
1463 | case NL80211_CHAN_WIDTH_80P80: | |
1464 | vht_opclass = 130; | |
1465 | break; | |
1466 | case NL80211_CHAN_WIDTH_10: | |
1467 | case NL80211_CHAN_WIDTH_5: | |
1468 | return false; /* unsupported for now */ | |
1469 | default: | |
1470 | vht_opclass = 0; | |
1471 | break; | |
1472 | } | |
1473 | ||
1474 | /* 5 GHz, channels 36..48 */ | |
1475 | if (freq >= 5180 && freq <= 5240) { | |
1476 | if (vht_opclass) { | |
1477 | *op_class = vht_opclass; | |
1478 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1479 | if (freq > chandef->chan->center_freq) | |
1480 | *op_class = 116; | |
1481 | else | |
1482 | *op_class = 117; | |
1483 | } else { | |
1484 | *op_class = 115; | |
1485 | } | |
1486 | ||
1487 | return true; | |
1488 | } | |
1489 | ||
1490 | /* 5 GHz, channels 52..64 */ | |
1491 | if (freq >= 5260 && freq <= 5320) { | |
1492 | if (vht_opclass) { | |
1493 | *op_class = vht_opclass; | |
1494 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1495 | if (freq > chandef->chan->center_freq) | |
1496 | *op_class = 119; | |
1497 | else | |
1498 | *op_class = 120; | |
1499 | } else { | |
1500 | *op_class = 118; | |
1501 | } | |
1502 | ||
1503 | return true; | |
1504 | } | |
1505 | ||
1506 | /* 5 GHz, channels 100..144 */ | |
1507 | if (freq >= 5500 && freq <= 5720) { | |
1508 | if (vht_opclass) { | |
1509 | *op_class = vht_opclass; | |
1510 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1511 | if (freq > chandef->chan->center_freq) | |
1512 | *op_class = 122; | |
1513 | else | |
1514 | *op_class = 123; | |
1515 | } else { | |
1516 | *op_class = 121; | |
1517 | } | |
1518 | ||
1519 | return true; | |
1520 | } | |
1521 | ||
1522 | /* 5 GHz, channels 149..169 */ | |
1523 | if (freq >= 5745 && freq <= 5845) { | |
1524 | if (vht_opclass) { | |
1525 | *op_class = vht_opclass; | |
1526 | } else if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1527 | if (freq > chandef->chan->center_freq) | |
1528 | *op_class = 126; | |
1529 | else | |
1530 | *op_class = 127; | |
1531 | } else if (freq <= 5805) { | |
1532 | *op_class = 124; | |
1533 | } else { | |
1534 | *op_class = 125; | |
1535 | } | |
1536 | ||
1537 | return true; | |
1538 | } | |
1539 | ||
1540 | /* 56.16 GHz, channel 1..4 */ | |
1541 | if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) { | |
1542 | if (chandef->width >= NL80211_CHAN_WIDTH_40) | |
1543 | return false; | |
1544 | ||
1545 | *op_class = 180; | |
1546 | return true; | |
1547 | } | |
1548 | ||
1549 | /* not supported yet */ | |
1550 | return false; | |
1551 | } | |
1552 | EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); | |
1553 | ||
56d1893d JB |
1554 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1555 | u32 beacon_int) | |
1556 | { | |
1557 | struct wireless_dev *wdev; | |
1558 | int res = 0; | |
1559 | ||
1560 | if (!beacon_int) | |
1561 | return -EINVAL; | |
1562 | ||
53873f13 | 1563 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
56d1893d JB |
1564 | if (!wdev->beacon_interval) |
1565 | continue; | |
1566 | if (wdev->beacon_interval != beacon_int) { | |
1567 | res = -EINVAL; | |
1568 | break; | |
1569 | } | |
1570 | } | |
1571 | ||
56d1893d JB |
1572 | return res; |
1573 | } | |
7527a782 | 1574 | |
65a124dd MK |
1575 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
1576 | const int num_different_channels, | |
1577 | const u8 radar_detect, | |
1578 | const int iftype_num[NUM_NL80211_IFTYPES], | |
1579 | void (*iter)(const struct ieee80211_iface_combination *c, | |
1580 | void *data), | |
1581 | void *data) | |
cb2d956d | 1582 | { |
8c48b50a FF |
1583 | const struct ieee80211_regdomain *regdom; |
1584 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1585 | int i, j, iftype; |
1586 | int num_interfaces = 0; | |
1587 | u32 used_iftypes = 0; | |
1588 | ||
8c48b50a FF |
1589 | if (radar_detect) { |
1590 | rcu_read_lock(); | |
1591 | regdom = rcu_dereference(cfg80211_regdomain); | |
1592 | if (regdom) | |
1593 | region = regdom->dfs_region; | |
1594 | rcu_read_unlock(); | |
1595 | } | |
1596 | ||
cb2d956d LC |
1597 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
1598 | num_interfaces += iftype_num[iftype]; | |
1599 | if (iftype_num[iftype] > 0 && | |
1600 | !(wiphy->software_iftypes & BIT(iftype))) | |
1601 | used_iftypes |= BIT(iftype); | |
1602 | } | |
1603 | ||
1604 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1605 | const struct ieee80211_iface_combination *c; | |
1606 | struct ieee80211_iface_limit *limits; | |
1607 | u32 all_iftypes = 0; | |
1608 | ||
1609 | c = &wiphy->iface_combinations[i]; | |
1610 | ||
1611 | if (num_interfaces > c->max_interfaces) | |
1612 | continue; | |
1613 | if (num_different_channels > c->num_different_channels) | |
1614 | continue; | |
1615 | ||
1616 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1617 | GFP_KERNEL); | |
1618 | if (!limits) | |
1619 | return -ENOMEM; | |
1620 | ||
1621 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1622 | if (wiphy->software_iftypes & BIT(iftype)) | |
1623 | continue; | |
1624 | for (j = 0; j < c->n_limits; j++) { | |
1625 | all_iftypes |= limits[j].types; | |
1626 | if (!(limits[j].types & BIT(iftype))) | |
1627 | continue; | |
1628 | if (limits[j].max < iftype_num[iftype]) | |
1629 | goto cont; | |
1630 | limits[j].max -= iftype_num[iftype]; | |
1631 | } | |
1632 | } | |
1633 | ||
65d26f29 | 1634 | if (radar_detect != (c->radar_detect_widths & radar_detect)) |
cb2d956d LC |
1635 | goto cont; |
1636 | ||
8c48b50a FF |
1637 | if (radar_detect && c->radar_detect_regions && |
1638 | !(c->radar_detect_regions & BIT(region))) | |
1639 | goto cont; | |
1640 | ||
cb2d956d LC |
1641 | /* Finally check that all iftypes that we're currently |
1642 | * using are actually part of this combination. If they | |
1643 | * aren't then we can't use this combination and have | |
1644 | * to continue to the next. | |
1645 | */ | |
1646 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1647 | goto cont; | |
1648 | ||
1649 | /* This combination covered all interface types and | |
1650 | * supported the requested numbers, so we're good. | |
1651 | */ | |
65a124dd MK |
1652 | |
1653 | (*iter)(c, data); | |
cb2d956d LC |
1654 | cont: |
1655 | kfree(limits); | |
1656 | } | |
1657 | ||
65a124dd MK |
1658 | return 0; |
1659 | } | |
1660 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1661 | ||
1662 | static void | |
1663 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1664 | void *data) | |
1665 | { | |
1666 | int *num = data; | |
1667 | (*num)++; | |
1668 | } | |
1669 | ||
1670 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
1671 | const int num_different_channels, | |
1672 | const u8 radar_detect, | |
1673 | const int iftype_num[NUM_NL80211_IFTYPES]) | |
1674 | { | |
1675 | int err, num = 0; | |
1676 | ||
1677 | err = cfg80211_iter_combinations(wiphy, num_different_channels, | |
1678 | radar_detect, iftype_num, | |
1679 | cfg80211_iter_sum_ifcombs, &num); | |
1680 | if (err) | |
1681 | return err; | |
1682 | if (num == 0) | |
1683 | return -EBUSY; | |
1684 | ||
1685 | return 0; | |
cb2d956d LC |
1686 | } |
1687 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1688 | ||
34850ab2 JB |
1689 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
1690 | const u8 *rates, unsigned int n_rates, | |
1691 | u32 *mask) | |
1692 | { | |
1693 | int i, j; | |
1694 | ||
a401d2bb JB |
1695 | if (!sband) |
1696 | return -EINVAL; | |
1697 | ||
34850ab2 JB |
1698 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1699 | return -EINVAL; | |
1700 | ||
1701 | *mask = 0; | |
1702 | ||
1703 | for (i = 0; i < n_rates; i++) { | |
1704 | int rate = (rates[i] & 0x7f) * 5; | |
1705 | bool found = false; | |
1706 | ||
1707 | for (j = 0; j < sband->n_bitrates; j++) { | |
1708 | if (sband->bitrates[j].bitrate == rate) { | |
1709 | found = true; | |
1710 | *mask |= BIT(j); | |
1711 | break; | |
1712 | } | |
1713 | } | |
1714 | if (!found) | |
1715 | return -EINVAL; | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * mask must have at least one bit set here since we | |
1720 | * didn't accept a 0-length rates array nor allowed | |
1721 | * entries in the array that didn't exist | |
1722 | */ | |
1723 | ||
1724 | return 0; | |
1725 | } | |
11a2a357 | 1726 | |
bdfbec2d IP |
1727 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1728 | { | |
57fbcce3 | 1729 | enum nl80211_band band; |
bdfbec2d IP |
1730 | unsigned int n_channels = 0; |
1731 | ||
57fbcce3 | 1732 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
bdfbec2d IP |
1733 | if (wiphy->bands[band]) |
1734 | n_channels += wiphy->bands[band]->n_channels; | |
1735 | ||
1736 | return n_channels; | |
1737 | } | |
1738 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1739 | ||
7406353d AQ |
1740 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1741 | struct station_info *sinfo) | |
1742 | { | |
1743 | struct cfg80211_registered_device *rdev; | |
1744 | struct wireless_dev *wdev; | |
1745 | ||
1746 | wdev = dev->ieee80211_ptr; | |
1747 | if (!wdev) | |
1748 | return -EOPNOTSUPP; | |
1749 | ||
1750 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1751 | if (!rdev->ops->get_station) | |
1752 | return -EOPNOTSUPP; | |
1753 | ||
1754 | return rdev_get_station(rdev, dev, mac_addr, sinfo); | |
1755 | } | |
1756 | EXPORT_SYMBOL(cfg80211_get_station); | |
1757 | ||
11a2a357 JB |
1758 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1759 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1760 | const unsigned char rfc1042_header[] __aligned(2) = | |
1761 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1762 | EXPORT_SYMBOL(rfc1042_header); | |
1763 | ||
1764 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1765 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1766 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1767 | EXPORT_SYMBOL(bridge_tunnel_header); |