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