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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Wireless utility functions | |
3 | * | |
d3236553 | 4 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
8318d78a | 5 | */ |
bc3b2d7f | 6 | #include <linux/export.h> |
d3236553 | 7 | #include <linux/bitops.h> |
e31a16d6 | 8 | #include <linux/etherdevice.h> |
5a0e3ad6 | 9 | #include <linux/slab.h> |
d3236553 | 10 | #include <net/cfg80211.h> |
e31a16d6 | 11 | #include <net/ip.h> |
b156579b | 12 | #include <net/dsfield.h> |
8318d78a | 13 | #include "core.h" |
e35e4d28 HG |
14 | #include "rdev-ops.h" |
15 | ||
8318d78a | 16 | |
bd815252 JB |
17 | struct ieee80211_rate * |
18 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 19 | u32 basic_rates, int bitrate) |
bd815252 JB |
20 | { |
21 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
22 | int i; | |
23 | ||
24 | for (i = 0; i < sband->n_bitrates; i++) { | |
25 | if (!(basic_rates & BIT(i))) | |
26 | continue; | |
27 | if (sband->bitrates[i].bitrate > bitrate) | |
28 | continue; | |
29 | result = &sband->bitrates[i]; | |
30 | } | |
31 | ||
32 | return result; | |
33 | } | |
34 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
35 | ||
b422c6cd AN |
36 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband) |
37 | { | |
38 | struct ieee80211_rate *bitrates; | |
39 | u32 mandatory_rates = 0; | |
40 | enum ieee80211_rate_flags mandatory_flag; | |
41 | int i; | |
42 | ||
43 | if (WARN_ON(!sband)) | |
44 | return 1; | |
45 | ||
46 | if (sband->band == IEEE80211_BAND_2GHZ) | |
47 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
48 | else | |
49 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
50 | ||
51 | bitrates = sband->bitrates; | |
52 | for (i = 0; i < sband->n_bitrates; i++) | |
53 | if (bitrates[i].flags & mandatory_flag) | |
54 | mandatory_rates |= BIT(i); | |
55 | return mandatory_rates; | |
56 | } | |
57 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
58 | ||
59eb21a6 | 59 | int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
8318d78a | 60 | { |
59eb21a6 BR |
61 | /* see 802.11 17.3.8.3.2 and Annex J |
62 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
63 | if (chan <= 0) |
64 | return 0; /* not supported */ | |
65 | switch (band) { | |
66 | case IEEE80211_BAND_2GHZ: | |
59eb21a6 BR |
67 | if (chan == 14) |
68 | return 2484; | |
69 | else if (chan < 14) | |
70 | return 2407 + chan * 5; | |
3a0c52a6 VK |
71 | break; |
72 | case IEEE80211_BAND_5GHZ: | |
73 | if (chan >= 182 && chan <= 196) | |
74 | return 4000 + chan * 5; | |
59eb21a6 | 75 | else |
3a0c52a6 VK |
76 | return 5000 + chan * 5; |
77 | break; | |
78 | case IEEE80211_BAND_60GHZ: | |
79 | if (chan < 5) | |
80 | return 56160 + chan * 2160; | |
81 | break; | |
82 | default: | |
83 | ; | |
59eb21a6 | 84 | } |
3a0c52a6 | 85 | return 0; /* not supported */ |
8318d78a JB |
86 | } |
87 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
88 | ||
89 | int ieee80211_frequency_to_channel(int freq) | |
90 | { | |
59eb21a6 | 91 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
92 | if (freq == 2484) |
93 | return 14; | |
59eb21a6 | 94 | else if (freq < 2484) |
8318d78a | 95 | return (freq - 2407) / 5; |
59eb21a6 BR |
96 | else if (freq >= 4910 && freq <= 4980) |
97 | return (freq - 4000) / 5; | |
3a0c52a6 | 98 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 99 | return (freq - 5000) / 5; |
3a0c52a6 VK |
100 | else if (freq >= 58320 && freq <= 64800) |
101 | return (freq - 56160) / 2160; | |
102 | else | |
103 | return 0; | |
8318d78a JB |
104 | } |
105 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
106 | ||
6c507cd0 JB |
107 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
108 | int freq) | |
906c730a JB |
109 | { |
110 | enum ieee80211_band band; | |
111 | struct ieee80211_supported_band *sband; | |
112 | int i; | |
113 | ||
114 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
115 | sband = wiphy->bands[band]; | |
116 | ||
117 | if (!sband) | |
118 | continue; | |
119 | ||
120 | for (i = 0; i < sband->n_channels; i++) { | |
121 | if (sband->channels[i].center_freq == freq) | |
122 | return &sband->channels[i]; | |
123 | } | |
124 | } | |
125 | ||
126 | return NULL; | |
127 | } | |
6c507cd0 | 128 | EXPORT_SYMBOL(__ieee80211_get_channel); |
906c730a | 129 | |
8318d78a JB |
130 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
131 | enum ieee80211_band band) | |
132 | { | |
133 | int i, want; | |
134 | ||
135 | switch (band) { | |
136 | case IEEE80211_BAND_5GHZ: | |
137 | want = 3; | |
138 | for (i = 0; i < sband->n_bitrates; i++) { | |
139 | if (sband->bitrates[i].bitrate == 60 || | |
140 | sband->bitrates[i].bitrate == 120 || | |
141 | sband->bitrates[i].bitrate == 240) { | |
142 | sband->bitrates[i].flags |= | |
143 | IEEE80211_RATE_MANDATORY_A; | |
144 | want--; | |
145 | } | |
146 | } | |
147 | WARN_ON(want); | |
148 | break; | |
149 | case IEEE80211_BAND_2GHZ: | |
150 | want = 7; | |
151 | for (i = 0; i < sband->n_bitrates; i++) { | |
152 | if (sband->bitrates[i].bitrate == 10) { | |
153 | sband->bitrates[i].flags |= | |
154 | IEEE80211_RATE_MANDATORY_B | | |
155 | IEEE80211_RATE_MANDATORY_G; | |
156 | want--; | |
157 | } | |
158 | ||
159 | if (sband->bitrates[i].bitrate == 20 || | |
160 | sband->bitrates[i].bitrate == 55 || | |
161 | sband->bitrates[i].bitrate == 110 || | |
162 | sband->bitrates[i].bitrate == 60 || | |
163 | sband->bitrates[i].bitrate == 120 || | |
164 | sband->bitrates[i].bitrate == 240) { | |
165 | sband->bitrates[i].flags |= | |
166 | IEEE80211_RATE_MANDATORY_G; | |
167 | want--; | |
168 | } | |
169 | ||
aac09fbf JB |
170 | if (sband->bitrates[i].bitrate != 10 && |
171 | sband->bitrates[i].bitrate != 20 && | |
172 | sband->bitrates[i].bitrate != 55 && | |
173 | sband->bitrates[i].bitrate != 110) | |
8318d78a JB |
174 | sband->bitrates[i].flags |= |
175 | IEEE80211_RATE_ERP_G; | |
176 | } | |
406f2388 | 177 | WARN_ON(want != 0 && want != 3 && want != 6); |
8318d78a | 178 | break; |
3a0c52a6 VK |
179 | case IEEE80211_BAND_60GHZ: |
180 | /* check for mandatory HT MCS 1..4 */ | |
181 | WARN_ON(!sband->ht_cap.ht_supported); | |
182 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
183 | break; | |
8318d78a JB |
184 | case IEEE80211_NUM_BANDS: |
185 | WARN_ON(1); | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
191 | { | |
192 | enum ieee80211_band band; | |
193 | ||
194 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
195 | if (wiphy->bands[band]) | |
196 | set_mandatory_flags_band(wiphy->bands[band], band); | |
197 | } | |
08645126 | 198 | |
38ba3c57 JM |
199 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
200 | { | |
201 | int i; | |
202 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
203 | if (cipher == wiphy->cipher_suites[i]) | |
204 | return true; | |
205 | return false; | |
206 | } | |
207 | ||
fffd0934 JB |
208 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
209 | struct key_params *params, int key_idx, | |
e31b8213 | 210 | bool pairwise, const u8 *mac_addr) |
08645126 JB |
211 | { |
212 | if (key_idx > 5) | |
213 | return -EINVAL; | |
214 | ||
e31b8213 JB |
215 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
216 | return -EINVAL; | |
217 | ||
218 | if (pairwise && !mac_addr) | |
219 | return -EINVAL; | |
220 | ||
08645126 JB |
221 | /* |
222 | * Disallow pairwise keys with non-zero index unless it's WEP | |
45cbad6a JO |
223 | * or a vendor specific cipher (because current deployments use |
224 | * pairwise WEP keys with non-zero indices and for vendor specific | |
225 | * ciphers this should be validated in the driver or hardware level | |
226 | * - but 802.11i clearly specifies to use zero) | |
08645126 | 227 | */ |
e31b8213 | 228 | if (pairwise && key_idx && |
45cbad6a JO |
229 | ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
230 | (params->cipher == WLAN_CIPHER_SUITE_CCMP) || | |
231 | (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) | |
08645126 JB |
232 | return -EINVAL; |
233 | ||
08645126 JB |
234 | switch (params->cipher) { |
235 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 236 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
237 | return -EINVAL; |
238 | break; | |
239 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 240 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
241 | return -EINVAL; |
242 | break; | |
243 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 244 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
245 | return -EINVAL; |
246 | break; | |
247 | case WLAN_CIPHER_SUITE_WEP104: | |
8fc0fee0 | 248 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
249 | return -EINVAL; |
250 | break; | |
251 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 252 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
253 | return -EINVAL; |
254 | break; | |
255 | default: | |
7d64b7cc JB |
256 | /* |
257 | * We don't know anything about this algorithm, | |
258 | * allow using it -- but the driver must check | |
259 | * all parameters! We still check below whether | |
260 | * or not the driver supports this algorithm, | |
261 | * of course. | |
262 | */ | |
263 | break; | |
08645126 JB |
264 | } |
265 | ||
9f26a952 JM |
266 | if (params->seq) { |
267 | switch (params->cipher) { | |
268 | case WLAN_CIPHER_SUITE_WEP40: | |
269 | case WLAN_CIPHER_SUITE_WEP104: | |
270 | /* These ciphers do not use key sequence */ | |
271 | return -EINVAL; | |
272 | case WLAN_CIPHER_SUITE_TKIP: | |
273 | case WLAN_CIPHER_SUITE_CCMP: | |
274 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
275 | if (params->seq_len != 6) | |
276 | return -EINVAL; | |
277 | break; | |
278 | } | |
279 | } | |
280 | ||
38ba3c57 | 281 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
282 | return -EINVAL; |
283 | ||
08645126 JB |
284 | return 0; |
285 | } | |
e31a16d6 | 286 | |
633adf1a | 287 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
288 | { |
289 | unsigned int hdrlen = 24; | |
290 | ||
291 | if (ieee80211_is_data(fc)) { | |
292 | if (ieee80211_has_a4(fc)) | |
293 | hdrlen = 30; | |
d0dd2de0 | 294 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 295 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
296 | if (ieee80211_has_order(fc)) |
297 | hdrlen += IEEE80211_HT_CTL_LEN; | |
298 | } | |
e31a16d6 ZY |
299 | goto out; |
300 | } | |
301 | ||
302 | if (ieee80211_is_ctl(fc)) { | |
303 | /* | |
304 | * ACK and CTS are 10 bytes, all others 16. To see how | |
305 | * to get this condition consider | |
306 | * subtype mask: 0b0000000011110000 (0x00F0) | |
307 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
308 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
309 | * bits that matter: ^^^ (0x00E0) | |
310 | * value of those: 0b0000000011000000 (0x00C0) | |
311 | */ | |
312 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
313 | hdrlen = 10; | |
314 | else | |
315 | hdrlen = 16; | |
316 | } | |
317 | out: | |
318 | return hdrlen; | |
319 | } | |
320 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
321 | ||
322 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
323 | { | |
324 | const struct ieee80211_hdr *hdr = | |
325 | (const struct ieee80211_hdr *)skb->data; | |
326 | unsigned int hdrlen; | |
327 | ||
328 | if (unlikely(skb->len < 10)) | |
329 | return 0; | |
330 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
331 | if (unlikely(hdrlen > skb->len)) | |
332 | return 0; | |
333 | return hdrlen; | |
334 | } | |
335 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
336 | ||
9b395bc3 | 337 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
e31a16d6 ZY |
338 | { |
339 | int ae = meshhdr->flags & MESH_FLAGS_AE; | |
7dd111e8 | 340 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 341 | switch (ae) { |
7dd111e8 | 342 | default: |
e31a16d6 ZY |
343 | case 0: |
344 | return 6; | |
3c5772a5 | 345 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 346 | return 12; |
3c5772a5 | 347 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 348 | return 18; |
e31a16d6 ZY |
349 | } |
350 | } | |
9b395bc3 | 351 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 352 | |
eaf85ca7 | 353 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
354 | enum nl80211_iftype iftype) |
355 | { | |
356 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
357 | u16 hdrlen, ethertype; | |
358 | u8 *payload; | |
359 | u8 dst[ETH_ALEN]; | |
360 | u8 src[ETH_ALEN] __aligned(2); | |
361 | ||
362 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
363 | return -1; | |
364 | ||
365 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
366 | ||
367 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
368 | * header | |
369 | * IEEE 802.11 address fields: | |
370 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
371 | * 0 0 DA SA BSSID n/a | |
372 | * 0 1 DA BSSID SA n/a | |
373 | * 1 0 BSSID SA DA n/a | |
374 | * 1 1 RA TA DA SA | |
375 | */ | |
376 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); | |
377 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); | |
378 | ||
379 | switch (hdr->frame_control & | |
380 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
381 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
382 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
383 | iftype != NL80211_IFTYPE_AP_VLAN && |
384 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
385 | return -1; |
386 | break; | |
387 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
388 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
389 | iftype != NL80211_IFTYPE_MESH_POINT && |
390 | iftype != NL80211_IFTYPE_AP_VLAN && | |
391 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
392 | return -1; |
393 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
394 | struct ieee80211s_hdr *meshdr = | |
395 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
396 | /* make sure meshdr->flags is on the linear part */ |
397 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
398 | return -1; | |
7dd111e8 JB |
399 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
400 | return -1; | |
e31a16d6 | 401 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
402 | skb_copy_bits(skb, hdrlen + |
403 | offsetof(struct ieee80211s_hdr, eaddr1), | |
404 | dst, ETH_ALEN); | |
405 | skb_copy_bits(skb, hdrlen + | |
406 | offsetof(struct ieee80211s_hdr, eaddr2), | |
407 | src, ETH_ALEN); | |
e31a16d6 | 408 | } |
e3cf8b3f | 409 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
e31a16d6 ZY |
410 | } |
411 | break; | |
412 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 413 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
414 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
415 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
e31a16d6 | 416 | (is_multicast_ether_addr(dst) && |
4c764729 | 417 | ether_addr_equal(src, addr))) |
e31a16d6 | 418 | return -1; |
3c5772a5 JC |
419 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
420 | struct ieee80211s_hdr *meshdr = | |
421 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
422 | /* make sure meshdr->flags is on the linear part */ |
423 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
424 | return -1; | |
7dd111e8 JB |
425 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) |
426 | return -1; | |
3c5772a5 | 427 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
428 | skb_copy_bits(skb, hdrlen + |
429 | offsetof(struct ieee80211s_hdr, eaddr1), | |
430 | src, ETH_ALEN); | |
431 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); | |
3c5772a5 | 432 | } |
e31a16d6 ZY |
433 | break; |
434 | case cpu_to_le16(0): | |
941c93cd AN |
435 | if (iftype != NL80211_IFTYPE_ADHOC && |
436 | iftype != NL80211_IFTYPE_STATION) | |
437 | return -1; | |
e31a16d6 ZY |
438 | break; |
439 | } | |
440 | ||
e3cf8b3f | 441 | if (!pskb_may_pull(skb, hdrlen + 8)) |
e31a16d6 ZY |
442 | return -1; |
443 | ||
444 | payload = skb->data + hdrlen; | |
445 | ethertype = (payload[6] << 8) | payload[7]; | |
446 | ||
4c764729 | 447 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
e31a16d6 | 448 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
4c764729 | 449 | ether_addr_equal(payload, bridge_tunnel_header))) { |
e31a16d6 ZY |
450 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
451 | * replace EtherType */ | |
452 | skb_pull(skb, hdrlen + 6); | |
453 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
454 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
455 | } else { | |
456 | struct ethhdr *ehdr; | |
457 | __be16 len; | |
458 | ||
459 | skb_pull(skb, hdrlen); | |
460 | len = htons(skb->len); | |
461 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
462 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
463 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
464 | ehdr->h_proto = len; | |
465 | } | |
466 | return 0; | |
467 | } | |
468 | EXPORT_SYMBOL(ieee80211_data_to_8023); | |
469 | ||
eaf85ca7 | 470 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
471 | enum nl80211_iftype iftype, u8 *bssid, bool qos) |
472 | { | |
473 | struct ieee80211_hdr hdr; | |
474 | u16 hdrlen, ethertype; | |
475 | __le16 fc; | |
476 | const u8 *encaps_data; | |
477 | int encaps_len, skip_header_bytes; | |
478 | int nh_pos, h_pos; | |
479 | int head_need; | |
480 | ||
481 | if (unlikely(skb->len < ETH_HLEN)) | |
482 | return -EINVAL; | |
483 | ||
484 | nh_pos = skb_network_header(skb) - skb->data; | |
485 | h_pos = skb_transport_header(skb) - skb->data; | |
486 | ||
487 | /* convert Ethernet header to proper 802.11 header (based on | |
488 | * operation mode) */ | |
489 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
490 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
491 | ||
492 | switch (iftype) { | |
493 | case NL80211_IFTYPE_AP: | |
494 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 495 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
496 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
497 | /* DA BSSID SA */ | |
498 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
499 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
500 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
501 | hdrlen = 24; | |
502 | break; | |
503 | case NL80211_IFTYPE_STATION: | |
074ac8df | 504 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
505 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
506 | /* BSSID SA DA */ | |
507 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
508 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
509 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
510 | hdrlen = 24; | |
511 | break; | |
512 | case NL80211_IFTYPE_ADHOC: | |
513 | /* DA SA BSSID */ | |
514 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
515 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
516 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
517 | hdrlen = 24; | |
518 | break; | |
519 | default: | |
520 | return -EOPNOTSUPP; | |
521 | } | |
522 | ||
523 | if (qos) { | |
524 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
525 | hdrlen += 2; | |
526 | } | |
527 | ||
528 | hdr.frame_control = fc; | |
529 | hdr.duration_id = 0; | |
530 | hdr.seq_ctrl = 0; | |
531 | ||
532 | skip_header_bytes = ETH_HLEN; | |
533 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
534 | encaps_data = bridge_tunnel_header; | |
535 | encaps_len = sizeof(bridge_tunnel_header); | |
536 | skip_header_bytes -= 2; | |
e5c5d22e | 537 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e31a16d6 ZY |
538 | encaps_data = rfc1042_header; |
539 | encaps_len = sizeof(rfc1042_header); | |
540 | skip_header_bytes -= 2; | |
541 | } else { | |
542 | encaps_data = NULL; | |
543 | encaps_len = 0; | |
544 | } | |
545 | ||
546 | skb_pull(skb, skip_header_bytes); | |
547 | nh_pos -= skip_header_bytes; | |
548 | h_pos -= skip_header_bytes; | |
549 | ||
550 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
551 | ||
552 | if (head_need > 0 || skb_cloned(skb)) { | |
553 | head_need = max(head_need, 0); | |
554 | if (head_need) | |
555 | skb_orphan(skb); | |
556 | ||
24616152 | 557 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 558 | return -ENOMEM; |
24616152 | 559 | |
e31a16d6 ZY |
560 | skb->truesize += head_need; |
561 | } | |
562 | ||
563 | if (encaps_data) { | |
564 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
565 | nh_pos += encaps_len; | |
566 | h_pos += encaps_len; | |
567 | } | |
568 | ||
569 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
570 | ||
571 | nh_pos += hdrlen; | |
572 | h_pos += hdrlen; | |
573 | ||
574 | /* Update skb pointers to various headers since this modified frame | |
575 | * is going to go through Linux networking code that may potentially | |
576 | * need things like pointer to IP header. */ | |
577 | skb_set_mac_header(skb, 0); | |
578 | skb_set_network_header(skb, nh_pos); | |
579 | skb_set_transport_header(skb, h_pos); | |
580 | ||
581 | return 0; | |
582 | } | |
583 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
584 | ||
eaf85ca7 ZY |
585 | |
586 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
587 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad YAP |
588 | const unsigned int extra_headroom, |
589 | bool has_80211_header) | |
eaf85ca7 ZY |
590 | { |
591 | struct sk_buff *frame = NULL; | |
592 | u16 ethertype; | |
593 | u8 *payload; | |
594 | const struct ethhdr *eth; | |
595 | int remaining, err; | |
596 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
597 | ||
8b3becad YAP |
598 | if (has_80211_header) { |
599 | err = ieee80211_data_to_8023(skb, addr, iftype); | |
600 | if (err) | |
601 | goto out; | |
eaf85ca7 | 602 | |
8b3becad YAP |
603 | /* skip the wrapping header */ |
604 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
605 | if (!eth) | |
606 | goto out; | |
607 | } else { | |
608 | eth = (struct ethhdr *) skb->data; | |
609 | } | |
eaf85ca7 ZY |
610 | |
611 | while (skb != frame) { | |
612 | u8 padding; | |
613 | __be16 len = eth->h_proto; | |
614 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
615 | ||
616 | remaining = skb->len; | |
617 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
618 | memcpy(src, eth->h_source, ETH_ALEN); | |
619 | ||
620 | padding = (4 - subframe_len) & 0x3; | |
621 | /* the last MSDU has no padding */ | |
622 | if (subframe_len > remaining) | |
623 | goto purge; | |
624 | ||
625 | skb_pull(skb, sizeof(struct ethhdr)); | |
626 | /* reuse skb for the last subframe */ | |
627 | if (remaining <= subframe_len + padding) | |
628 | frame = skb; | |
629 | else { | |
630 | unsigned int hlen = ALIGN(extra_headroom, 4); | |
631 | /* | |
632 | * Allocate and reserve two bytes more for payload | |
633 | * alignment since sizeof(struct ethhdr) is 14. | |
634 | */ | |
635 | frame = dev_alloc_skb(hlen + subframe_len + 2); | |
636 | if (!frame) | |
637 | goto purge; | |
638 | ||
639 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
640 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
641 | ntohs(len)); | |
642 | ||
643 | eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + | |
644 | padding); | |
645 | if (!eth) { | |
646 | dev_kfree_skb(frame); | |
647 | goto purge; | |
648 | } | |
649 | } | |
650 | ||
651 | skb_reset_network_header(frame); | |
652 | frame->dev = skb->dev; | |
653 | frame->priority = skb->priority; | |
654 | ||
655 | payload = frame->data; | |
656 | ethertype = (payload[6] << 8) | payload[7]; | |
657 | ||
ac422d3c | 658 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 659 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 660 | ether_addr_equal(payload, bridge_tunnel_header))) { |
eaf85ca7 ZY |
661 | /* remove RFC1042 or Bridge-Tunnel |
662 | * encapsulation and replace EtherType */ | |
663 | skb_pull(frame, 6); | |
664 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
665 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
666 | } else { | |
667 | memcpy(skb_push(frame, sizeof(__be16)), &len, | |
668 | sizeof(__be16)); | |
669 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
670 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
671 | } | |
672 | __skb_queue_tail(list, frame); | |
673 | } | |
674 | ||
675 | return; | |
676 | ||
677 | purge: | |
678 | __skb_queue_purge(list); | |
679 | out: | |
680 | dev_kfree_skb(skb); | |
681 | } | |
682 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
683 | ||
e31a16d6 ZY |
684 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
685 | unsigned int cfg80211_classify8021d(struct sk_buff *skb) | |
686 | { | |
687 | unsigned int dscp; | |
688 | ||
689 | /* skb->priority values from 256->263 are magic values to | |
690 | * directly indicate a specific 802.1d priority. This is used | |
691 | * to allow 802.1d priority to be passed directly in from VLAN | |
692 | * tags, etc. | |
693 | */ | |
694 | if (skb->priority >= 256 && skb->priority <= 263) | |
695 | return skb->priority - 256; | |
696 | ||
697 | switch (skb->protocol) { | |
698 | case htons(ETH_P_IP): | |
b156579b DT |
699 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
700 | break; | |
701 | case htons(ETH_P_IPV6): | |
702 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 ZY |
703 | break; |
704 | default: | |
705 | return 0; | |
706 | } | |
707 | ||
708 | return dscp >> 5; | |
709 | } | |
710 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
711 | |
712 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
713 | { | |
9caf0364 JB |
714 | const struct cfg80211_bss_ies *ies; |
715 | ||
716 | ies = rcu_dereference(bss->ies); | |
717 | if (!ies) | |
517357c6 | 718 | return NULL; |
9caf0364 JB |
719 | |
720 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
721 | } |
722 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
723 | |
724 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
725 | { | |
726 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); | |
727 | struct net_device *dev = wdev->netdev; | |
728 | int i; | |
729 | ||
730 | if (!wdev->connect_keys) | |
731 | return; | |
732 | ||
733 | for (i = 0; i < 6; i++) { | |
734 | if (!wdev->connect_keys->params[i].cipher) | |
735 | continue; | |
e35e4d28 HG |
736 | if (rdev_add_key(rdev, dev, i, false, NULL, |
737 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 738 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
739 | continue; |
740 | } | |
fffd0934 | 741 | if (wdev->connect_keys->def == i) |
e35e4d28 | 742 | if (rdev_set_default_key(rdev, dev, i, true, true)) { |
e9c0268f | 743 | netdev_err(dev, "failed to set defkey %d\n", i); |
1e056665 ZY |
744 | continue; |
745 | } | |
fffd0934 | 746 | if (wdev->connect_keys->defmgmt == i) |
e35e4d28 | 747 | if (rdev_set_default_mgmt_key(rdev, dev, i)) |
e9c0268f | 748 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
fffd0934 JB |
749 | } |
750 | ||
751 | kfree(wdev->connect_keys); | |
752 | wdev->connect_keys = NULL; | |
753 | } | |
3d54d255 | 754 | |
1f6fc43e | 755 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
756 | { |
757 | struct cfg80211_event *ev; | |
758 | unsigned long flags; | |
759 | const u8 *bssid = NULL; | |
760 | ||
761 | spin_lock_irqsave(&wdev->event_lock, flags); | |
762 | while (!list_empty(&wdev->event_list)) { | |
763 | ev = list_first_entry(&wdev->event_list, | |
764 | struct cfg80211_event, list); | |
765 | list_del(&ev->list); | |
766 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
767 | ||
768 | wdev_lock(wdev); | |
769 | switch (ev->type) { | |
770 | case EVENT_CONNECT_RESULT: | |
771 | if (!is_zero_ether_addr(ev->cr.bssid)) | |
772 | bssid = ev->cr.bssid; | |
773 | __cfg80211_connect_result( | |
774 | wdev->netdev, bssid, | |
775 | ev->cr.req_ie, ev->cr.req_ie_len, | |
776 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
777 | ev->cr.status, | |
778 | ev->cr.status == WLAN_STATUS_SUCCESS, | |
779 | NULL); | |
780 | break; | |
781 | case EVENT_ROAMED: | |
adbde344 VT |
782 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
783 | ev->rm.req_ie_len, ev->rm.resp_ie, | |
784 | ev->rm.resp_ie_len); | |
3d54d255 JB |
785 | break; |
786 | case EVENT_DISCONNECTED: | |
787 | __cfg80211_disconnected(wdev->netdev, | |
788 | ev->dc.ie, ev->dc.ie_len, | |
789 | ev->dc.reason, true); | |
790 | break; | |
791 | case EVENT_IBSS_JOINED: | |
792 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); | |
793 | break; | |
794 | } | |
795 | wdev_unlock(wdev); | |
796 | ||
797 | kfree(ev); | |
798 | ||
799 | spin_lock_irqsave(&wdev->event_lock, flags); | |
800 | } | |
801 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
802 | } | |
803 | ||
804 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
805 | { | |
806 | struct wireless_dev *wdev; | |
807 | ||
808 | ASSERT_RTNL(); | |
809 | ASSERT_RDEV_LOCK(rdev); | |
810 | ||
89a54e48 | 811 | list_for_each_entry(wdev, &rdev->wdev_list, list) |
3d54d255 | 812 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
813 | } |
814 | ||
815 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
816 | struct net_device *dev, enum nl80211_iftype ntype, | |
817 | u32 *flags, struct vif_params *params) | |
818 | { | |
819 | int err; | |
820 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
821 | ||
822 | ASSERT_RDEV_LOCK(rdev); | |
823 | ||
824 | /* don't support changing VLANs, you just re-create them */ | |
825 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
826 | return -EOPNOTSUPP; | |
827 | ||
98104fde JB |
828 | /* cannot change into P2P device type */ |
829 | if (ntype == NL80211_IFTYPE_P2P_DEVICE) | |
830 | return -EOPNOTSUPP; | |
831 | ||
3d54d255 JB |
832 | if (!rdev->ops->change_virtual_intf || |
833 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
834 | return -EOPNOTSUPP; | |
835 | ||
ad4bb6f8 | 836 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 837 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
838 | (ntype == NL80211_IFTYPE_ADHOC || |
839 | ntype == NL80211_IFTYPE_STATION || | |
840 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
841 | return -EBUSY; |
842 | ||
f8cdddb8 | 843 | if (ntype != otype && netif_running(dev)) { |
7527a782 JB |
844 | err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr, |
845 | ntype); | |
846 | if (err) | |
847 | return err; | |
848 | ||
9bc383de | 849 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 850 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
9bc383de | 851 | |
3d54d255 | 852 | switch (otype) { |
ac800140 MK |
853 | case NL80211_IFTYPE_AP: |
854 | cfg80211_stop_ap(rdev, dev); | |
855 | break; | |
3d54d255 JB |
856 | case NL80211_IFTYPE_ADHOC: |
857 | cfg80211_leave_ibss(rdev, dev, false); | |
858 | break; | |
859 | case NL80211_IFTYPE_STATION: | |
074ac8df | 860 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 861 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
862 | cfg80211_disconnect(rdev, dev, |
863 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 864 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
865 | break; |
866 | case NL80211_IFTYPE_MESH_POINT: | |
867 | /* mesh should be handled? */ | |
868 | break; | |
869 | default: | |
870 | break; | |
871 | } | |
872 | ||
873 | cfg80211_process_rdev_events(rdev); | |
874 | } | |
875 | ||
e35e4d28 | 876 | err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
3d54d255 JB |
877 | |
878 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
879 | ||
9bc383de JB |
880 | if (!err && params && params->use_4addr != -1) |
881 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
882 | ||
ad4bb6f8 JB |
883 | if (!err) { |
884 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
885 | switch (ntype) { | |
886 | case NL80211_IFTYPE_STATION: | |
887 | if (dev->ieee80211_ptr->use_4addr) | |
888 | break; | |
889 | /* fall through */ | |
074ac8df | 890 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
891 | case NL80211_IFTYPE_ADHOC: |
892 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
893 | break; | |
074ac8df | 894 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
895 | case NL80211_IFTYPE_AP: |
896 | case NL80211_IFTYPE_AP_VLAN: | |
897 | case NL80211_IFTYPE_WDS: | |
898 | case NL80211_IFTYPE_MESH_POINT: | |
899 | /* bridging OK */ | |
900 | break; | |
901 | case NL80211_IFTYPE_MONITOR: | |
902 | /* monitor can't bridge anyway */ | |
903 | break; | |
904 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 905 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
906 | /* not happening */ |
907 | break; | |
98104fde JB |
908 | case NL80211_IFTYPE_P2P_DEVICE: |
909 | WARN_ON(1); | |
910 | break; | |
ad4bb6f8 JB |
911 | } |
912 | } | |
913 | ||
dbbae26a MK |
914 | if (!err && ntype != otype && netif_running(dev)) { |
915 | cfg80211_update_iface_num(rdev, ntype, 1); | |
916 | cfg80211_update_iface_num(rdev, otype, -1); | |
917 | } | |
918 | ||
3d54d255 JB |
919 | return err; |
920 | } | |
254416aa | 921 | |
95ddc1fc VK |
922 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
923 | { | |
924 | static const u32 __mcs2bitrate[] = { | |
925 | /* control PHY */ | |
926 | [0] = 275, | |
927 | /* SC PHY */ | |
928 | [1] = 3850, | |
929 | [2] = 7700, | |
930 | [3] = 9625, | |
931 | [4] = 11550, | |
932 | [5] = 12512, /* 1251.25 mbps */ | |
933 | [6] = 15400, | |
934 | [7] = 19250, | |
935 | [8] = 23100, | |
936 | [9] = 25025, | |
937 | [10] = 30800, | |
938 | [11] = 38500, | |
939 | [12] = 46200, | |
940 | /* OFDM PHY */ | |
941 | [13] = 6930, | |
942 | [14] = 8662, /* 866.25 mbps */ | |
943 | [15] = 13860, | |
944 | [16] = 17325, | |
945 | [17] = 20790, | |
946 | [18] = 27720, | |
947 | [19] = 34650, | |
948 | [20] = 41580, | |
949 | [21] = 45045, | |
950 | [22] = 51975, | |
951 | [23] = 62370, | |
952 | [24] = 67568, /* 6756.75 mbps */ | |
953 | /* LP-SC PHY */ | |
954 | [25] = 6260, | |
955 | [26] = 8340, | |
956 | [27] = 11120, | |
957 | [28] = 12510, | |
958 | [29] = 16680, | |
959 | [30] = 22240, | |
960 | [31] = 25030, | |
961 | }; | |
962 | ||
963 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
964 | return 0; | |
965 | ||
966 | return __mcs2bitrate[rate->mcs]; | |
967 | } | |
968 | ||
db9c64cf JB |
969 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
970 | { | |
971 | static const u32 base[4][10] = { | |
972 | { 6500000, | |
973 | 13000000, | |
974 | 19500000, | |
975 | 26000000, | |
976 | 39000000, | |
977 | 52000000, | |
978 | 58500000, | |
979 | 65000000, | |
980 | 78000000, | |
981 | 0, | |
982 | }, | |
983 | { 13500000, | |
984 | 27000000, | |
985 | 40500000, | |
986 | 54000000, | |
987 | 81000000, | |
988 | 108000000, | |
989 | 121500000, | |
990 | 135000000, | |
991 | 162000000, | |
992 | 180000000, | |
993 | }, | |
994 | { 29300000, | |
995 | 58500000, | |
996 | 87800000, | |
997 | 117000000, | |
998 | 175500000, | |
999 | 234000000, | |
1000 | 263300000, | |
1001 | 292500000, | |
1002 | 351000000, | |
1003 | 390000000, | |
1004 | }, | |
1005 | { 58500000, | |
1006 | 117000000, | |
1007 | 175500000, | |
1008 | 234000000, | |
1009 | 351000000, | |
1010 | 468000000, | |
1011 | 526500000, | |
1012 | 585000000, | |
1013 | 702000000, | |
1014 | 780000000, | |
1015 | }, | |
1016 | }; | |
1017 | u32 bitrate; | |
1018 | int idx; | |
1019 | ||
1020 | if (WARN_ON_ONCE(rate->mcs > 9)) | |
1021 | return 0; | |
1022 | ||
1023 | idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH | | |
1024 | RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 : | |
1025 | rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 : | |
1026 | rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 0; | |
1027 | ||
1028 | bitrate = base[idx][rate->mcs]; | |
1029 | bitrate *= rate->nss; | |
1030 | ||
1031 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1032 | bitrate = (bitrate / 9) * 10; | |
1033 | ||
1034 | /* do NOT round down here */ | |
1035 | return (bitrate + 50000) / 100000; | |
1036 | } | |
1037 | ||
8eb41c8d | 1038 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa JL |
1039 | { |
1040 | int modulation, streams, bitrate; | |
1041 | ||
db9c64cf JB |
1042 | if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
1043 | !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) | |
254416aa | 1044 | return rate->legacy; |
95ddc1fc VK |
1045 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1046 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1047 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1048 | return cfg80211_calculate_bitrate_vht(rate); | |
254416aa JL |
1049 | |
1050 | /* the formula below does only work for MCS values smaller than 32 */ | |
2615f375 | 1051 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
254416aa JL |
1052 | return 0; |
1053 | ||
1054 | modulation = rate->mcs & 7; | |
1055 | streams = (rate->mcs >> 3) + 1; | |
1056 | ||
1057 | bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? | |
1058 | 13500000 : 6500000; | |
1059 | ||
1060 | if (modulation < 4) | |
1061 | bitrate *= (modulation + 1); | |
1062 | else if (modulation == 4) | |
1063 | bitrate *= (modulation + 2); | |
1064 | else | |
1065 | bitrate *= (modulation + 3); | |
1066 | ||
1067 | bitrate *= streams; | |
1068 | ||
1069 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1070 | bitrate = (bitrate / 9) * 10; | |
1071 | ||
1072 | /* do NOT round down here */ | |
1073 | return (bitrate + 50000) / 100000; | |
1074 | } | |
8097e149 | 1075 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1076 | |
c216e641 AS |
1077 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1078 | enum ieee80211_p2p_attr_id attr, | |
1079 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1080 | { |
1081 | u8 *out = buf; | |
1082 | u16 attr_remaining = 0; | |
1083 | bool desired_attr = false; | |
1084 | u16 desired_len = 0; | |
1085 | ||
1086 | while (len > 0) { | |
1087 | unsigned int iedatalen; | |
1088 | unsigned int copy; | |
1089 | const u8 *iedata; | |
1090 | ||
1091 | if (len < 2) | |
1092 | return -EILSEQ; | |
1093 | iedatalen = ies[1]; | |
1094 | if (iedatalen + 2 > len) | |
1095 | return -EILSEQ; | |
1096 | ||
1097 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1098 | goto cont; | |
1099 | ||
1100 | if (iedatalen < 4) | |
1101 | goto cont; | |
1102 | ||
1103 | iedata = ies + 2; | |
1104 | ||
1105 | /* check WFA OUI, P2P subtype */ | |
1106 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1107 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1108 | goto cont; | |
1109 | ||
1110 | iedatalen -= 4; | |
1111 | iedata += 4; | |
1112 | ||
1113 | /* check attribute continuation into this IE */ | |
1114 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1115 | if (copy && desired_attr) { | |
1116 | desired_len += copy; | |
1117 | if (out) { | |
1118 | memcpy(out, iedata, min(bufsize, copy)); | |
1119 | out += min(bufsize, copy); | |
1120 | bufsize -= min(bufsize, copy); | |
1121 | } | |
1122 | ||
1123 | ||
1124 | if (copy == attr_remaining) | |
1125 | return desired_len; | |
1126 | } | |
1127 | ||
1128 | attr_remaining -= copy; | |
1129 | if (attr_remaining) | |
1130 | goto cont; | |
1131 | ||
1132 | iedatalen -= copy; | |
1133 | iedata += copy; | |
1134 | ||
1135 | while (iedatalen > 0) { | |
1136 | u16 attr_len; | |
1137 | ||
1138 | /* P2P attribute ID & size must fit */ | |
1139 | if (iedatalen < 3) | |
1140 | return -EILSEQ; | |
1141 | desired_attr = iedata[0] == attr; | |
1142 | attr_len = get_unaligned_le16(iedata + 1); | |
1143 | iedatalen -= 3; | |
1144 | iedata += 3; | |
1145 | ||
1146 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1147 | ||
1148 | if (desired_attr) { | |
1149 | desired_len += copy; | |
1150 | if (out) { | |
1151 | memcpy(out, iedata, min(bufsize, copy)); | |
1152 | out += min(bufsize, copy); | |
1153 | bufsize -= min(bufsize, copy); | |
1154 | } | |
1155 | ||
1156 | if (copy == attr_len) | |
1157 | return desired_len; | |
1158 | } | |
1159 | ||
1160 | iedata += copy; | |
1161 | iedatalen -= copy; | |
1162 | attr_remaining = attr_len - copy; | |
1163 | } | |
1164 | ||
1165 | cont: | |
1166 | len -= ies[1] + 2; | |
1167 | ies += ies[1] + 2; | |
1168 | } | |
1169 | ||
1170 | if (attr_remaining && desired_attr) | |
1171 | return -EILSEQ; | |
1172 | ||
1173 | return -ENOENT; | |
1174 | } | |
1175 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1176 | ||
1ce3e82b JB |
1177 | bool ieee80211_operating_class_to_band(u8 operating_class, |
1178 | enum ieee80211_band *band) | |
1179 | { | |
1180 | switch (operating_class) { | |
1181 | case 112: | |
1182 | case 115 ... 127: | |
1183 | *band = IEEE80211_BAND_5GHZ; | |
1184 | return true; | |
1185 | case 81: | |
1186 | case 82: | |
1187 | case 83: | |
1188 | case 84: | |
1189 | *band = IEEE80211_BAND_2GHZ; | |
1190 | return true; | |
55300a13 VK |
1191 | case 180: |
1192 | *band = IEEE80211_BAND_60GHZ; | |
1193 | return true; | |
1ce3e82b JB |
1194 | } |
1195 | ||
1196 | return false; | |
1197 | } | |
1198 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1199 | ||
56d1893d JB |
1200 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1201 | u32 beacon_int) | |
1202 | { | |
1203 | struct wireless_dev *wdev; | |
1204 | int res = 0; | |
1205 | ||
1206 | if (!beacon_int) | |
1207 | return -EINVAL; | |
1208 | ||
89a54e48 | 1209 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
56d1893d JB |
1210 | if (!wdev->beacon_interval) |
1211 | continue; | |
1212 | if (wdev->beacon_interval != beacon_int) { | |
1213 | res = -EINVAL; | |
1214 | break; | |
1215 | } | |
1216 | } | |
1217 | ||
56d1893d JB |
1218 | return res; |
1219 | } | |
7527a782 | 1220 | |
d4e50c59 MK |
1221 | int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
1222 | struct wireless_dev *wdev, | |
1223 | enum nl80211_iftype iftype, | |
1224 | struct ieee80211_channel *chan, | |
11c4a075 SW |
1225 | enum cfg80211_chan_mode chanmode, |
1226 | u8 radar_detect) | |
7527a782 JB |
1227 | { |
1228 | struct wireless_dev *wdev_iter; | |
463454b5 | 1229 | u32 used_iftypes = BIT(iftype); |
7527a782 | 1230 | int num[NUM_NL80211_IFTYPES]; |
d4e50c59 MK |
1231 | struct ieee80211_channel |
1232 | *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; | |
1233 | struct ieee80211_channel *ch; | |
1234 | enum cfg80211_chan_mode chmode; | |
1235 | int num_different_channels = 0; | |
7527a782 | 1236 | int total = 1; |
11c4a075 | 1237 | bool radar_required; |
7527a782 JB |
1238 | int i, j; |
1239 | ||
1240 | ASSERT_RTNL(); | |
1241 | ||
11c4a075 SW |
1242 | if (WARN_ON(hweight32(radar_detect) > 1)) |
1243 | return -EINVAL; | |
1244 | ||
1245 | switch (iftype) { | |
1246 | case NL80211_IFTYPE_ADHOC: | |
1247 | case NL80211_IFTYPE_AP: | |
1248 | case NL80211_IFTYPE_AP_VLAN: | |
1249 | case NL80211_IFTYPE_MESH_POINT: | |
1250 | case NL80211_IFTYPE_P2P_GO: | |
1251 | case NL80211_IFTYPE_WDS: | |
683d41ae SW |
1252 | radar_required = !!(chan && |
1253 | (chan->flags & IEEE80211_CHAN_RADAR)); | |
11c4a075 SW |
1254 | break; |
1255 | case NL80211_IFTYPE_P2P_CLIENT: | |
1256 | case NL80211_IFTYPE_STATION: | |
bba87ffe | 1257 | case NL80211_IFTYPE_P2P_DEVICE: |
11c4a075 SW |
1258 | case NL80211_IFTYPE_MONITOR: |
1259 | radar_required = false; | |
1260 | break; | |
11c4a075 SW |
1261 | case NUM_NL80211_IFTYPES: |
1262 | case NL80211_IFTYPE_UNSPECIFIED: | |
1263 | default: | |
1264 | return -EINVAL; | |
1265 | } | |
1266 | ||
1267 | if (radar_required && !radar_detect) | |
1268 | return -EINVAL; | |
1269 | ||
7527a782 | 1270 | /* Always allow software iftypes */ |
11c4a075 SW |
1271 | if (rdev->wiphy.software_iftypes & BIT(iftype)) { |
1272 | if (radar_detect) | |
1273 | return -EINVAL; | |
7527a782 | 1274 | return 0; |
11c4a075 | 1275 | } |
7527a782 | 1276 | |
7527a782 | 1277 | memset(num, 0, sizeof(num)); |
d4e50c59 | 1278 | memset(used_channels, 0, sizeof(used_channels)); |
7527a782 JB |
1279 | |
1280 | num[iftype] = 1; | |
1281 | ||
d4e50c59 MK |
1282 | switch (chanmode) { |
1283 | case CHAN_MODE_UNDEFINED: | |
1284 | break; | |
1285 | case CHAN_MODE_SHARED: | |
1286 | WARN_ON(!chan); | |
1287 | used_channels[0] = chan; | |
1288 | num_different_channels++; | |
1289 | break; | |
1290 | case CHAN_MODE_EXCLUSIVE: | |
1291 | num_different_channels++; | |
1292 | break; | |
1293 | } | |
1294 | ||
89a54e48 | 1295 | list_for_each_entry(wdev_iter, &rdev->wdev_list, list) { |
7527a782 JB |
1296 | if (wdev_iter == wdev) |
1297 | continue; | |
6e3ab554 | 1298 | if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) { |
98104fde JB |
1299 | if (!wdev_iter->p2p_started) |
1300 | continue; | |
6e3ab554 JB |
1301 | } else if (wdev_iter->netdev) { |
1302 | if (!netif_running(wdev_iter->netdev)) | |
1303 | continue; | |
98104fde JB |
1304 | } else { |
1305 | WARN_ON(1); | |
1306 | } | |
7527a782 JB |
1307 | |
1308 | if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) | |
1309 | continue; | |
1310 | ||
8e95ea49 JB |
1311 | /* |
1312 | * We may be holding the "wdev" mutex, but now need to lock | |
1313 | * wdev_iter. This is OK because once we get here wdev_iter | |
1314 | * is not wdev (tested above), but we need to use the nested | |
1315 | * locking for lockdep. | |
1316 | */ | |
1317 | mutex_lock_nested(&wdev_iter->mtx, 1); | |
1318 | __acquire(wdev_iter->mtx); | |
1319 | cfg80211_get_chan_state(wdev_iter, &ch, &chmode); | |
1320 | wdev_unlock(wdev_iter); | |
d4e50c59 MK |
1321 | |
1322 | switch (chmode) { | |
1323 | case CHAN_MODE_UNDEFINED: | |
1324 | break; | |
1325 | case CHAN_MODE_SHARED: | |
1326 | for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) | |
1327 | if (!used_channels[i] || used_channels[i] == ch) | |
1328 | break; | |
1329 | ||
e4e32459 | 1330 | if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
d4e50c59 | 1331 | return -EBUSY; |
d4e50c59 MK |
1332 | |
1333 | if (used_channels[i] == NULL) { | |
1334 | used_channels[i] = ch; | |
1335 | num_different_channels++; | |
1336 | } | |
1337 | break; | |
1338 | case CHAN_MODE_EXCLUSIVE: | |
1339 | num_different_channels++; | |
1340 | break; | |
1341 | } | |
1342 | ||
7527a782 JB |
1343 | num[wdev_iter->iftype]++; |
1344 | total++; | |
463454b5 | 1345 | used_iftypes |= BIT(wdev_iter->iftype); |
7527a782 | 1346 | } |
7527a782 | 1347 | |
11c4a075 | 1348 | if (total == 1 && !radar_detect) |
8e8b41f9 JB |
1349 | return 0; |
1350 | ||
7527a782 JB |
1351 | for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) { |
1352 | const struct ieee80211_iface_combination *c; | |
1353 | struct ieee80211_iface_limit *limits; | |
463454b5 | 1354 | u32 all_iftypes = 0; |
7527a782 JB |
1355 | |
1356 | c = &rdev->wiphy.iface_combinations[i]; | |
1357 | ||
d4e50c59 MK |
1358 | if (total > c->max_interfaces) |
1359 | continue; | |
1360 | if (num_different_channels > c->num_different_channels) | |
1361 | continue; | |
1362 | ||
7527a782 JB |
1363 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
1364 | GFP_KERNEL); | |
1365 | if (!limits) | |
1366 | return -ENOMEM; | |
7527a782 JB |
1367 | |
1368 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1369 | if (rdev->wiphy.software_iftypes & BIT(iftype)) | |
1370 | continue; | |
1371 | for (j = 0; j < c->n_limits; j++) { | |
463454b5 | 1372 | all_iftypes |= limits[j].types; |
e55a4046 | 1373 | if (!(limits[j].types & BIT(iftype))) |
7527a782 JB |
1374 | continue; |
1375 | if (limits[j].max < num[iftype]) | |
1376 | goto cont; | |
1377 | limits[j].max -= num[iftype]; | |
1378 | } | |
1379 | } | |
463454b5 | 1380 | |
11c4a075 SW |
1381 | if (radar_detect && !(c->radar_detect_widths & radar_detect)) |
1382 | goto cont; | |
1383 | ||
463454b5 JB |
1384 | /* |
1385 | * Finally check that all iftypes that we're currently | |
1386 | * using are actually part of this combination. If they | |
1387 | * aren't then we can't use this combination and have | |
1388 | * to continue to the next. | |
1389 | */ | |
1390 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1391 | goto cont; | |
1392 | ||
1393 | /* | |
1394 | * This combination covered all interface types and | |
1395 | * supported the requested numbers, so we're good. | |
1396 | */ | |
7527a782 JB |
1397 | kfree(limits); |
1398 | return 0; | |
1399 | cont: | |
1400 | kfree(limits); | |
1401 | } | |
1402 | ||
1403 | return -EBUSY; | |
1404 | } | |
34850ab2 JB |
1405 | |
1406 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, | |
1407 | const u8 *rates, unsigned int n_rates, | |
1408 | u32 *mask) | |
1409 | { | |
1410 | int i, j; | |
1411 | ||
a401d2bb JB |
1412 | if (!sband) |
1413 | return -EINVAL; | |
1414 | ||
34850ab2 JB |
1415 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1416 | return -EINVAL; | |
1417 | ||
1418 | *mask = 0; | |
1419 | ||
1420 | for (i = 0; i < n_rates; i++) { | |
1421 | int rate = (rates[i] & 0x7f) * 5; | |
1422 | bool found = false; | |
1423 | ||
1424 | for (j = 0; j < sband->n_bitrates; j++) { | |
1425 | if (sband->bitrates[j].bitrate == rate) { | |
1426 | found = true; | |
1427 | *mask |= BIT(j); | |
1428 | break; | |
1429 | } | |
1430 | } | |
1431 | if (!found) | |
1432 | return -EINVAL; | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | * mask must have at least one bit set here since we | |
1437 | * didn't accept a 0-length rates array nor allowed | |
1438 | * entries in the array that didn't exist | |
1439 | */ | |
1440 | ||
1441 | return 0; | |
1442 | } | |
11a2a357 JB |
1443 | |
1444 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
1445 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1446 | const unsigned char rfc1042_header[] __aligned(2) = | |
1447 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1448 | EXPORT_SYMBOL(rfc1042_header); | |
1449 | ||
1450 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1451 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1452 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1453 | EXPORT_SYMBOL(bridge_tunnel_header); |