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