Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Wireless utility functions | |
3 | * | |
d3236553 | 4 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
2740f0cf | 5 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 6 | */ |
bc3b2d7f | 7 | #include <linux/export.h> |
d3236553 | 8 | #include <linux/bitops.h> |
e31a16d6 | 9 | #include <linux/etherdevice.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
d3236553 | 11 | #include <net/cfg80211.h> |
e31a16d6 | 12 | #include <net/ip.h> |
b156579b | 13 | #include <net/dsfield.h> |
c6ca5e28 | 14 | #include <linux/if_vlan.h> |
960d97f9 | 15 | #include <linux/mpls.h> |
8318d78a | 16 | #include "core.h" |
e35e4d28 HG |
17 | #include "rdev-ops.h" |
18 | ||
8318d78a | 19 | |
bd815252 JB |
20 | struct ieee80211_rate * |
21 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 22 | u32 basic_rates, int bitrate) |
bd815252 JB |
23 | { |
24 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
25 | int i; | |
26 | ||
27 | for (i = 0; i < sband->n_bitrates; i++) { | |
28 | if (!(basic_rates & BIT(i))) | |
29 | continue; | |
30 | if (sband->bitrates[i].bitrate > bitrate) | |
31 | continue; | |
32 | result = &sband->bitrates[i]; | |
33 | } | |
34 | ||
35 | return result; | |
36 | } | |
37 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
38 | ||
74608aca SW |
39 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
40 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
41 | { |
42 | struct ieee80211_rate *bitrates; | |
43 | u32 mandatory_rates = 0; | |
44 | enum ieee80211_rate_flags mandatory_flag; | |
45 | int i; | |
46 | ||
47 | if (WARN_ON(!sband)) | |
48 | return 1; | |
49 | ||
74608aca SW |
50 | if (sband->band == IEEE80211_BAND_2GHZ) { |
51 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || | |
52 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
53 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
54 | else | |
55 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
56 | } else { | |
b422c6cd | 57 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 58 | } |
b422c6cd AN |
59 | |
60 | bitrates = sband->bitrates; | |
61 | for (i = 0; i < sband->n_bitrates; i++) | |
62 | if (bitrates[i].flags & mandatory_flag) | |
63 | mandatory_rates |= BIT(i); | |
64 | return mandatory_rates; | |
65 | } | |
66 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
67 | ||
59eb21a6 | 68 | int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
8318d78a | 69 | { |
59eb21a6 BR |
70 | /* see 802.11 17.3.8.3.2 and Annex J |
71 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
72 | if (chan <= 0) |
73 | return 0; /* not supported */ | |
74 | switch (band) { | |
75 | case IEEE80211_BAND_2GHZ: | |
59eb21a6 BR |
76 | if (chan == 14) |
77 | return 2484; | |
78 | else if (chan < 14) | |
79 | return 2407 + chan * 5; | |
3a0c52a6 VK |
80 | break; |
81 | case IEEE80211_BAND_5GHZ: | |
82 | if (chan >= 182 && chan <= 196) | |
83 | return 4000 + chan * 5; | |
59eb21a6 | 84 | else |
3a0c52a6 VK |
85 | return 5000 + chan * 5; |
86 | break; | |
87 | case IEEE80211_BAND_60GHZ: | |
88 | if (chan < 5) | |
89 | return 56160 + chan * 2160; | |
90 | break; | |
91 | default: | |
92 | ; | |
59eb21a6 | 93 | } |
3a0c52a6 | 94 | return 0; /* not supported */ |
8318d78a JB |
95 | } |
96 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
97 | ||
98 | int ieee80211_frequency_to_channel(int freq) | |
99 | { | |
59eb21a6 | 100 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
101 | if (freq == 2484) |
102 | return 14; | |
59eb21a6 | 103 | else if (freq < 2484) |
8318d78a | 104 | return (freq - 2407) / 5; |
59eb21a6 BR |
105 | else if (freq >= 4910 && freq <= 4980) |
106 | return (freq - 4000) / 5; | |
3a0c52a6 | 107 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 108 | return (freq - 5000) / 5; |
3a0c52a6 VK |
109 | else if (freq >= 58320 && freq <= 64800) |
110 | return (freq - 56160) / 2160; | |
111 | else | |
112 | return 0; | |
8318d78a JB |
113 | } |
114 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
115 | ||
6c507cd0 JB |
116 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
117 | int freq) | |
906c730a JB |
118 | { |
119 | enum ieee80211_band band; | |
120 | struct ieee80211_supported_band *sband; | |
121 | int i; | |
122 | ||
123 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
124 | sband = wiphy->bands[band]; | |
125 | ||
126 | if (!sband) | |
127 | continue; | |
128 | ||
129 | for (i = 0; i < sband->n_channels; i++) { | |
130 | if (sband->channels[i].center_freq == freq) | |
131 | return &sband->channels[i]; | |
132 | } | |
133 | } | |
134 | ||
135 | return NULL; | |
136 | } | |
6c507cd0 | 137 | EXPORT_SYMBOL(__ieee80211_get_channel); |
906c730a | 138 | |
8318d78a JB |
139 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
140 | enum ieee80211_band band) | |
141 | { | |
142 | int i, want; | |
143 | ||
144 | switch (band) { | |
145 | case IEEE80211_BAND_5GHZ: | |
146 | want = 3; | |
147 | for (i = 0; i < sband->n_bitrates; i++) { | |
148 | if (sband->bitrates[i].bitrate == 60 || | |
149 | sband->bitrates[i].bitrate == 120 || | |
150 | sband->bitrates[i].bitrate == 240) { | |
151 | sband->bitrates[i].flags |= | |
152 | IEEE80211_RATE_MANDATORY_A; | |
153 | want--; | |
154 | } | |
155 | } | |
156 | WARN_ON(want); | |
157 | break; | |
158 | case IEEE80211_BAND_2GHZ: | |
159 | want = 7; | |
160 | for (i = 0; i < sband->n_bitrates; i++) { | |
161 | if (sband->bitrates[i].bitrate == 10) { | |
162 | sband->bitrates[i].flags |= | |
163 | IEEE80211_RATE_MANDATORY_B | | |
164 | IEEE80211_RATE_MANDATORY_G; | |
165 | want--; | |
166 | } | |
167 | ||
168 | if (sband->bitrates[i].bitrate == 20 || | |
169 | sband->bitrates[i].bitrate == 55 || | |
170 | sband->bitrates[i].bitrate == 110 || | |
171 | sband->bitrates[i].bitrate == 60 || | |
172 | sband->bitrates[i].bitrate == 120 || | |
173 | sband->bitrates[i].bitrate == 240) { | |
174 | sband->bitrates[i].flags |= | |
175 | IEEE80211_RATE_MANDATORY_G; | |
176 | want--; | |
177 | } | |
178 | ||
aac09fbf JB |
179 | if (sband->bitrates[i].bitrate != 10 && |
180 | sband->bitrates[i].bitrate != 20 && | |
181 | sband->bitrates[i].bitrate != 55 && | |
182 | sband->bitrates[i].bitrate != 110) | |
8318d78a JB |
183 | sband->bitrates[i].flags |= |
184 | IEEE80211_RATE_ERP_G; | |
185 | } | |
406f2388 | 186 | WARN_ON(want != 0 && want != 3 && want != 6); |
8318d78a | 187 | break; |
3a0c52a6 VK |
188 | case IEEE80211_BAND_60GHZ: |
189 | /* check for mandatory HT MCS 1..4 */ | |
190 | WARN_ON(!sband->ht_cap.ht_supported); | |
191 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
192 | break; | |
8318d78a JB |
193 | case IEEE80211_NUM_BANDS: |
194 | WARN_ON(1); | |
195 | break; | |
196 | } | |
197 | } | |
198 | ||
199 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
200 | { | |
201 | enum ieee80211_band band; | |
202 | ||
203 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
204 | if (wiphy->bands[band]) | |
205 | set_mandatory_flags_band(wiphy->bands[band], band); | |
206 | } | |
08645126 | 207 | |
38ba3c57 JM |
208 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
209 | { | |
210 | int i; | |
211 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
212 | if (cipher == wiphy->cipher_suites[i]) | |
213 | return true; | |
214 | return false; | |
215 | } | |
216 | ||
fffd0934 JB |
217 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
218 | struct key_params *params, int key_idx, | |
e31b8213 | 219 | bool pairwise, const u8 *mac_addr) |
08645126 JB |
220 | { |
221 | if (key_idx > 5) | |
222 | return -EINVAL; | |
223 | ||
e31b8213 JB |
224 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
225 | return -EINVAL; | |
226 | ||
227 | if (pairwise && !mac_addr) | |
228 | return -EINVAL; | |
229 | ||
08645126 JB |
230 | /* |
231 | * Disallow pairwise keys with non-zero index unless it's WEP | |
45cbad6a JO |
232 | * or a vendor specific cipher (because current deployments use |
233 | * pairwise WEP keys with non-zero indices and for vendor specific | |
234 | * ciphers this should be validated in the driver or hardware level | |
235 | * - but 802.11i clearly specifies to use zero) | |
08645126 | 236 | */ |
e31b8213 | 237 | if (pairwise && key_idx && |
45cbad6a JO |
238 | ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
239 | (params->cipher == WLAN_CIPHER_SUITE_CCMP) || | |
240 | (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) | |
08645126 JB |
241 | return -EINVAL; |
242 | ||
08645126 JB |
243 | switch (params->cipher) { |
244 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 245 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
246 | return -EINVAL; |
247 | break; | |
248 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 249 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
250 | return -EINVAL; |
251 | break; | |
252 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 253 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
254 | return -EINVAL; |
255 | break; | |
256 | case WLAN_CIPHER_SUITE_WEP104: | |
8fc0fee0 | 257 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
258 | return -EINVAL; |
259 | break; | |
260 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 261 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
262 | return -EINVAL; |
263 | break; | |
264 | default: | |
7d64b7cc JB |
265 | /* |
266 | * We don't know anything about this algorithm, | |
267 | * allow using it -- but the driver must check | |
268 | * all parameters! We still check below whether | |
269 | * or not the driver supports this algorithm, | |
270 | * of course. | |
271 | */ | |
272 | break; | |
08645126 JB |
273 | } |
274 | ||
9f26a952 JM |
275 | if (params->seq) { |
276 | switch (params->cipher) { | |
277 | case WLAN_CIPHER_SUITE_WEP40: | |
278 | case WLAN_CIPHER_SUITE_WEP104: | |
279 | /* These ciphers do not use key sequence */ | |
280 | return -EINVAL; | |
281 | case WLAN_CIPHER_SUITE_TKIP: | |
282 | case WLAN_CIPHER_SUITE_CCMP: | |
283 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
284 | if (params->seq_len != 6) | |
285 | return -EINVAL; | |
286 | break; | |
287 | } | |
288 | } | |
289 | ||
38ba3c57 | 290 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
291 | return -EINVAL; |
292 | ||
08645126 JB |
293 | return 0; |
294 | } | |
e31a16d6 | 295 | |
633adf1a | 296 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
297 | { |
298 | unsigned int hdrlen = 24; | |
299 | ||
300 | if (ieee80211_is_data(fc)) { | |
301 | if (ieee80211_has_a4(fc)) | |
302 | hdrlen = 30; | |
d0dd2de0 | 303 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 304 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
305 | if (ieee80211_has_order(fc)) |
306 | hdrlen += IEEE80211_HT_CTL_LEN; | |
307 | } | |
e31a16d6 ZY |
308 | goto out; |
309 | } | |
310 | ||
311 | if (ieee80211_is_ctl(fc)) { | |
312 | /* | |
313 | * ACK and CTS are 10 bytes, all others 16. To see how | |
314 | * to get this condition consider | |
315 | * subtype mask: 0b0000000011110000 (0x00F0) | |
316 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
317 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
318 | * bits that matter: ^^^ (0x00E0) | |
319 | * value of those: 0b0000000011000000 (0x00C0) | |
320 | */ | |
321 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
322 | hdrlen = 10; | |
323 | else | |
324 | hdrlen = 16; | |
325 | } | |
326 | out: | |
327 | return hdrlen; | |
328 | } | |
329 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
330 | ||
331 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
332 | { | |
333 | const struct ieee80211_hdr *hdr = | |
334 | (const struct ieee80211_hdr *)skb->data; | |
335 | unsigned int hdrlen; | |
336 | ||
337 | if (unlikely(skb->len < 10)) | |
338 | return 0; | |
339 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
340 | if (unlikely(hdrlen > skb->len)) | |
341 | return 0; | |
342 | return hdrlen; | |
343 | } | |
344 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
345 | ||
9b395bc3 | 346 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
e31a16d6 ZY |
347 | { |
348 | int ae = meshhdr->flags & MESH_FLAGS_AE; | |
7dd111e8 | 349 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 350 | switch (ae) { |
7dd111e8 | 351 | default: |
e31a16d6 ZY |
352 | case 0: |
353 | return 6; | |
3c5772a5 | 354 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 355 | return 12; |
3c5772a5 | 356 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 357 | return 18; |
e31a16d6 ZY |
358 | } |
359 | } | |
9b395bc3 | 360 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 361 | |
eaf85ca7 | 362 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
363 | enum nl80211_iftype iftype) |
364 | { | |
365 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
366 | u16 hdrlen, ethertype; | |
367 | u8 *payload; | |
368 | u8 dst[ETH_ALEN]; | |
369 | u8 src[ETH_ALEN] __aligned(2); | |
370 | ||
371 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
372 | return -1; | |
373 | ||
374 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
375 | ||
376 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
377 | * header | |
378 | * IEEE 802.11 address fields: | |
379 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
380 | * 0 0 DA SA BSSID n/a | |
381 | * 0 1 DA BSSID SA n/a | |
382 | * 1 0 BSSID SA DA n/a | |
383 | * 1 1 RA TA DA SA | |
384 | */ | |
385 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); | |
386 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); | |
387 | ||
388 | switch (hdr->frame_control & | |
389 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
390 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
391 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
392 | iftype != NL80211_IFTYPE_AP_VLAN && |
393 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
394 | return -1; |
395 | break; | |
396 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
397 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
398 | iftype != NL80211_IFTYPE_MESH_POINT && |
399 | iftype != NL80211_IFTYPE_AP_VLAN && | |
400 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
401 | return -1; |
402 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
403 | struct ieee80211s_hdr *meshdr = | |
404 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
405 | /* make sure meshdr->flags is on the linear part */ |
406 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
407 | return -1; | |
7dd111e8 JB |
408 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
409 | return -1; | |
e31a16d6 | 410 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
411 | skb_copy_bits(skb, hdrlen + |
412 | offsetof(struct ieee80211s_hdr, eaddr1), | |
413 | dst, ETH_ALEN); | |
414 | skb_copy_bits(skb, hdrlen + | |
415 | offsetof(struct ieee80211s_hdr, eaddr2), | |
416 | src, ETH_ALEN); | |
e31a16d6 | 417 | } |
e3cf8b3f | 418 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
e31a16d6 ZY |
419 | } |
420 | break; | |
421 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 422 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
423 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
424 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
e31a16d6 | 425 | (is_multicast_ether_addr(dst) && |
4c764729 | 426 | ether_addr_equal(src, addr))) |
e31a16d6 | 427 | return -1; |
3c5772a5 JC |
428 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
429 | struct ieee80211s_hdr *meshdr = | |
430 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
431 | /* make sure meshdr->flags is on the linear part */ |
432 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
433 | return -1; | |
7dd111e8 JB |
434 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) |
435 | return -1; | |
3c5772a5 | 436 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
437 | skb_copy_bits(skb, hdrlen + |
438 | offsetof(struct ieee80211s_hdr, eaddr1), | |
439 | src, ETH_ALEN); | |
440 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); | |
3c5772a5 | 441 | } |
e31a16d6 ZY |
442 | break; |
443 | case cpu_to_le16(0): | |
941c93cd AN |
444 | if (iftype != NL80211_IFTYPE_ADHOC && |
445 | iftype != NL80211_IFTYPE_STATION) | |
446 | return -1; | |
e31a16d6 ZY |
447 | break; |
448 | } | |
449 | ||
e3cf8b3f | 450 | if (!pskb_may_pull(skb, hdrlen + 8)) |
e31a16d6 ZY |
451 | return -1; |
452 | ||
453 | payload = skb->data + hdrlen; | |
454 | ethertype = (payload[6] << 8) | payload[7]; | |
455 | ||
4c764729 | 456 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
e31a16d6 | 457 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
4c764729 | 458 | ether_addr_equal(payload, bridge_tunnel_header))) { |
e31a16d6 ZY |
459 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
460 | * replace EtherType */ | |
461 | skb_pull(skb, hdrlen + 6); | |
462 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
463 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
464 | } else { | |
465 | struct ethhdr *ehdr; | |
466 | __be16 len; | |
467 | ||
468 | skb_pull(skb, hdrlen); | |
469 | len = htons(skb->len); | |
470 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
471 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
472 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
473 | ehdr->h_proto = len; | |
474 | } | |
475 | return 0; | |
476 | } | |
477 | EXPORT_SYMBOL(ieee80211_data_to_8023); | |
478 | ||
eaf85ca7 | 479 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
c1e5f471 JB |
480 | enum nl80211_iftype iftype, |
481 | const u8 *bssid, bool qos) | |
e31a16d6 ZY |
482 | { |
483 | struct ieee80211_hdr hdr; | |
484 | u16 hdrlen, ethertype; | |
485 | __le16 fc; | |
486 | const u8 *encaps_data; | |
487 | int encaps_len, skip_header_bytes; | |
488 | int nh_pos, h_pos; | |
489 | int head_need; | |
490 | ||
491 | if (unlikely(skb->len < ETH_HLEN)) | |
492 | return -EINVAL; | |
493 | ||
494 | nh_pos = skb_network_header(skb) - skb->data; | |
495 | h_pos = skb_transport_header(skb) - skb->data; | |
496 | ||
497 | /* convert Ethernet header to proper 802.11 header (based on | |
498 | * operation mode) */ | |
499 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
500 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
501 | ||
502 | switch (iftype) { | |
503 | case NL80211_IFTYPE_AP: | |
504 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 505 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
506 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
507 | /* DA BSSID SA */ | |
508 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
509 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
510 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
511 | hdrlen = 24; | |
512 | break; | |
513 | case NL80211_IFTYPE_STATION: | |
074ac8df | 514 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
515 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
516 | /* BSSID SA DA */ | |
517 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
518 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
519 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
520 | hdrlen = 24; | |
521 | break; | |
522 | case NL80211_IFTYPE_ADHOC: | |
523 | /* DA SA BSSID */ | |
524 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
525 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
526 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
527 | hdrlen = 24; | |
528 | break; | |
529 | default: | |
530 | return -EOPNOTSUPP; | |
531 | } | |
532 | ||
533 | if (qos) { | |
534 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
535 | hdrlen += 2; | |
536 | } | |
537 | ||
538 | hdr.frame_control = fc; | |
539 | hdr.duration_id = 0; | |
540 | hdr.seq_ctrl = 0; | |
541 | ||
542 | skip_header_bytes = ETH_HLEN; | |
543 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
544 | encaps_data = bridge_tunnel_header; | |
545 | encaps_len = sizeof(bridge_tunnel_header); | |
546 | skip_header_bytes -= 2; | |
e5c5d22e | 547 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e31a16d6 ZY |
548 | encaps_data = rfc1042_header; |
549 | encaps_len = sizeof(rfc1042_header); | |
550 | skip_header_bytes -= 2; | |
551 | } else { | |
552 | encaps_data = NULL; | |
553 | encaps_len = 0; | |
554 | } | |
555 | ||
556 | skb_pull(skb, skip_header_bytes); | |
557 | nh_pos -= skip_header_bytes; | |
558 | h_pos -= skip_header_bytes; | |
559 | ||
560 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
561 | ||
562 | if (head_need > 0 || skb_cloned(skb)) { | |
563 | head_need = max(head_need, 0); | |
564 | if (head_need) | |
565 | skb_orphan(skb); | |
566 | ||
24616152 | 567 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 568 | return -ENOMEM; |
24616152 | 569 | |
e31a16d6 ZY |
570 | skb->truesize += head_need; |
571 | } | |
572 | ||
573 | if (encaps_data) { | |
574 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
575 | nh_pos += encaps_len; | |
576 | h_pos += encaps_len; | |
577 | } | |
578 | ||
579 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
580 | ||
581 | nh_pos += hdrlen; | |
582 | h_pos += hdrlen; | |
583 | ||
584 | /* Update skb pointers to various headers since this modified frame | |
585 | * is going to go through Linux networking code that may potentially | |
586 | * need things like pointer to IP header. */ | |
587 | skb_set_mac_header(skb, 0); | |
588 | skb_set_network_header(skb, nh_pos); | |
589 | skb_set_transport_header(skb, h_pos); | |
590 | ||
591 | return 0; | |
592 | } | |
593 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
594 | ||
eaf85ca7 ZY |
595 | |
596 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
597 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad YAP |
598 | const unsigned int extra_headroom, |
599 | bool has_80211_header) | |
eaf85ca7 ZY |
600 | { |
601 | struct sk_buff *frame = NULL; | |
602 | u16 ethertype; | |
603 | u8 *payload; | |
604 | const struct ethhdr *eth; | |
605 | int remaining, err; | |
606 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
607 | ||
8b3becad YAP |
608 | if (has_80211_header) { |
609 | err = ieee80211_data_to_8023(skb, addr, iftype); | |
610 | if (err) | |
611 | goto out; | |
eaf85ca7 | 612 | |
8b3becad YAP |
613 | /* skip the wrapping header */ |
614 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
615 | if (!eth) | |
616 | goto out; | |
617 | } else { | |
618 | eth = (struct ethhdr *) skb->data; | |
619 | } | |
eaf85ca7 ZY |
620 | |
621 | while (skb != frame) { | |
622 | u8 padding; | |
623 | __be16 len = eth->h_proto; | |
624 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
625 | ||
626 | remaining = skb->len; | |
627 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
628 | memcpy(src, eth->h_source, ETH_ALEN); | |
629 | ||
630 | padding = (4 - subframe_len) & 0x3; | |
631 | /* the last MSDU has no padding */ | |
632 | if (subframe_len > remaining) | |
633 | goto purge; | |
634 | ||
635 | skb_pull(skb, sizeof(struct ethhdr)); | |
636 | /* reuse skb for the last subframe */ | |
637 | if (remaining <= subframe_len + padding) | |
638 | frame = skb; | |
639 | else { | |
640 | unsigned int hlen = ALIGN(extra_headroom, 4); | |
641 | /* | |
642 | * Allocate and reserve two bytes more for payload | |
643 | * alignment since sizeof(struct ethhdr) is 14. | |
644 | */ | |
645 | frame = dev_alloc_skb(hlen + subframe_len + 2); | |
646 | if (!frame) | |
647 | goto purge; | |
648 | ||
649 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
650 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
651 | ntohs(len)); | |
652 | ||
653 | eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + | |
654 | padding); | |
655 | if (!eth) { | |
656 | dev_kfree_skb(frame); | |
657 | goto purge; | |
658 | } | |
659 | } | |
660 | ||
661 | skb_reset_network_header(frame); | |
662 | frame->dev = skb->dev; | |
663 | frame->priority = skb->priority; | |
664 | ||
665 | payload = frame->data; | |
666 | ethertype = (payload[6] << 8) | payload[7]; | |
667 | ||
ac422d3c | 668 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 669 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 670 | ether_addr_equal(payload, bridge_tunnel_header))) { |
eaf85ca7 ZY |
671 | /* remove RFC1042 or Bridge-Tunnel |
672 | * encapsulation and replace EtherType */ | |
673 | skb_pull(frame, 6); | |
674 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
675 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
676 | } else { | |
677 | memcpy(skb_push(frame, sizeof(__be16)), &len, | |
678 | sizeof(__be16)); | |
679 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
680 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
681 | } | |
682 | __skb_queue_tail(list, frame); | |
683 | } | |
684 | ||
685 | return; | |
686 | ||
687 | purge: | |
688 | __skb_queue_purge(list); | |
689 | out: | |
690 | dev_kfree_skb(skb); | |
691 | } | |
692 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
693 | ||
e31a16d6 | 694 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
695 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
696 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
697 | { |
698 | unsigned int dscp; | |
c6ca5e28 | 699 | unsigned char vlan_priority; |
e31a16d6 ZY |
700 | |
701 | /* skb->priority values from 256->263 are magic values to | |
702 | * directly indicate a specific 802.1d priority. This is used | |
703 | * to allow 802.1d priority to be passed directly in from VLAN | |
704 | * tags, etc. | |
705 | */ | |
706 | if (skb->priority >= 256 && skb->priority <= 263) | |
707 | return skb->priority - 256; | |
708 | ||
c6ca5e28 V |
709 | if (vlan_tx_tag_present(skb)) { |
710 | vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK) | |
711 | >> VLAN_PRIO_SHIFT; | |
712 | if (vlan_priority > 0) | |
713 | return vlan_priority; | |
714 | } | |
715 | ||
e31a16d6 ZY |
716 | switch (skb->protocol) { |
717 | case htons(ETH_P_IP): | |
b156579b DT |
718 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
719 | break; | |
720 | case htons(ETH_P_IPV6): | |
721 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 | 722 | break; |
960d97f9 SW |
723 | case htons(ETH_P_MPLS_UC): |
724 | case htons(ETH_P_MPLS_MC): { | |
725 | struct mpls_label mpls_tmp, *mpls; | |
726 | ||
727 | mpls = skb_header_pointer(skb, sizeof(struct ethhdr), | |
728 | sizeof(*mpls), &mpls_tmp); | |
729 | if (!mpls) | |
730 | return 0; | |
731 | ||
732 | return (ntohl(mpls->entry) & MPLS_LS_TC_MASK) | |
733 | >> MPLS_LS_TC_SHIFT; | |
734 | } | |
735 | case htons(ETH_P_80221): | |
736 | /* 802.21 is always network control traffic */ | |
737 | return 7; | |
e31a16d6 ZY |
738 | default: |
739 | return 0; | |
740 | } | |
741 | ||
fa9ffc74 KP |
742 | if (qos_map) { |
743 | unsigned int i, tmp_dscp = dscp >> 2; | |
744 | ||
745 | for (i = 0; i < qos_map->num_des; i++) { | |
746 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) | |
747 | return qos_map->dscp_exception[i].up; | |
748 | } | |
749 | ||
750 | for (i = 0; i < 8; i++) { | |
751 | if (tmp_dscp >= qos_map->up[i].low && | |
752 | tmp_dscp <= qos_map->up[i].high) | |
753 | return i; | |
754 | } | |
755 | } | |
756 | ||
e31a16d6 ZY |
757 | return dscp >> 5; |
758 | } | |
759 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
760 | |
761 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
762 | { | |
9caf0364 JB |
763 | const struct cfg80211_bss_ies *ies; |
764 | ||
765 | ies = rcu_dereference(bss->ies); | |
766 | if (!ies) | |
517357c6 | 767 | return NULL; |
9caf0364 JB |
768 | |
769 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
770 | } |
771 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
772 | |
773 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
774 | { | |
f26cbf40 | 775 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
fffd0934 JB |
776 | struct net_device *dev = wdev->netdev; |
777 | int i; | |
778 | ||
779 | if (!wdev->connect_keys) | |
780 | return; | |
781 | ||
782 | for (i = 0; i < 6; i++) { | |
783 | if (!wdev->connect_keys->params[i].cipher) | |
784 | continue; | |
e35e4d28 HG |
785 | if (rdev_add_key(rdev, dev, i, false, NULL, |
786 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 787 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
788 | continue; |
789 | } | |
fffd0934 | 790 | if (wdev->connect_keys->def == i) |
e35e4d28 | 791 | if (rdev_set_default_key(rdev, dev, i, true, true)) { |
e9c0268f | 792 | netdev_err(dev, "failed to set defkey %d\n", i); |
1e056665 ZY |
793 | continue; |
794 | } | |
fffd0934 | 795 | if (wdev->connect_keys->defmgmt == i) |
e35e4d28 | 796 | if (rdev_set_default_mgmt_key(rdev, dev, i)) |
e9c0268f | 797 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
fffd0934 JB |
798 | } |
799 | ||
b47f610b | 800 | kzfree(wdev->connect_keys); |
fffd0934 JB |
801 | wdev->connect_keys = NULL; |
802 | } | |
3d54d255 | 803 | |
1f6fc43e | 804 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
805 | { |
806 | struct cfg80211_event *ev; | |
807 | unsigned long flags; | |
808 | const u8 *bssid = NULL; | |
809 | ||
810 | spin_lock_irqsave(&wdev->event_lock, flags); | |
811 | while (!list_empty(&wdev->event_list)) { | |
812 | ev = list_first_entry(&wdev->event_list, | |
813 | struct cfg80211_event, list); | |
814 | list_del(&ev->list); | |
815 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
816 | ||
817 | wdev_lock(wdev); | |
818 | switch (ev->type) { | |
819 | case EVENT_CONNECT_RESULT: | |
820 | if (!is_zero_ether_addr(ev->cr.bssid)) | |
821 | bssid = ev->cr.bssid; | |
822 | __cfg80211_connect_result( | |
823 | wdev->netdev, bssid, | |
824 | ev->cr.req_ie, ev->cr.req_ie_len, | |
825 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
826 | ev->cr.status, | |
827 | ev->cr.status == WLAN_STATUS_SUCCESS, | |
828 | NULL); | |
829 | break; | |
830 | case EVENT_ROAMED: | |
adbde344 VT |
831 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
832 | ev->rm.req_ie_len, ev->rm.resp_ie, | |
833 | ev->rm.resp_ie_len); | |
3d54d255 JB |
834 | break; |
835 | case EVENT_DISCONNECTED: | |
836 | __cfg80211_disconnected(wdev->netdev, | |
837 | ev->dc.ie, ev->dc.ie_len, | |
838 | ev->dc.reason, true); | |
839 | break; | |
840 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
841 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
842 | ev->ij.channel); | |
3d54d255 | 843 | break; |
f04c2203 MK |
844 | case EVENT_STOPPED: |
845 | __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev); | |
846 | break; | |
3d54d255 JB |
847 | } |
848 | wdev_unlock(wdev); | |
849 | ||
850 | kfree(ev); | |
851 | ||
852 | spin_lock_irqsave(&wdev->event_lock, flags); | |
853 | } | |
854 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
855 | } | |
856 | ||
857 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
858 | { | |
859 | struct wireless_dev *wdev; | |
860 | ||
861 | ASSERT_RTNL(); | |
3d54d255 | 862 | |
89a54e48 | 863 | list_for_each_entry(wdev, &rdev->wdev_list, list) |
3d54d255 | 864 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
865 | } |
866 | ||
867 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
868 | struct net_device *dev, enum nl80211_iftype ntype, | |
869 | u32 *flags, struct vif_params *params) | |
870 | { | |
871 | int err; | |
872 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
873 | ||
73fb08e2 | 874 | ASSERT_RTNL(); |
3d54d255 JB |
875 | |
876 | /* don't support changing VLANs, you just re-create them */ | |
877 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
878 | return -EOPNOTSUPP; | |
879 | ||
98104fde JB |
880 | /* cannot change into P2P device type */ |
881 | if (ntype == NL80211_IFTYPE_P2P_DEVICE) | |
882 | return -EOPNOTSUPP; | |
883 | ||
3d54d255 JB |
884 | if (!rdev->ops->change_virtual_intf || |
885 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
886 | return -EOPNOTSUPP; | |
887 | ||
ad4bb6f8 | 888 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 889 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
890 | (ntype == NL80211_IFTYPE_ADHOC || |
891 | ntype == NL80211_IFTYPE_STATION || | |
892 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
893 | return -EBUSY; |
894 | ||
f8cdddb8 | 895 | if (ntype != otype && netif_running(dev)) { |
9bc383de | 896 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 897 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 898 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 899 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 900 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 901 | |
3d54d255 | 902 | switch (otype) { |
ac800140 | 903 | case NL80211_IFTYPE_AP: |
7c8d5e03 | 904 | cfg80211_stop_ap(rdev, dev, true); |
ac800140 | 905 | break; |
3d54d255 JB |
906 | case NL80211_IFTYPE_ADHOC: |
907 | cfg80211_leave_ibss(rdev, dev, false); | |
908 | break; | |
909 | case NL80211_IFTYPE_STATION: | |
074ac8df | 910 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 911 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
912 | cfg80211_disconnect(rdev, dev, |
913 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 914 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
915 | break; |
916 | case NL80211_IFTYPE_MESH_POINT: | |
917 | /* mesh should be handled? */ | |
918 | break; | |
919 | default: | |
920 | break; | |
921 | } | |
922 | ||
923 | cfg80211_process_rdev_events(rdev); | |
924 | } | |
925 | ||
e35e4d28 | 926 | err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
3d54d255 JB |
927 | |
928 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
929 | ||
9bc383de JB |
930 | if (!err && params && params->use_4addr != -1) |
931 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
932 | ||
ad4bb6f8 JB |
933 | if (!err) { |
934 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
935 | switch (ntype) { | |
936 | case NL80211_IFTYPE_STATION: | |
937 | if (dev->ieee80211_ptr->use_4addr) | |
938 | break; | |
939 | /* fall through */ | |
074ac8df | 940 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
941 | case NL80211_IFTYPE_ADHOC: |
942 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
943 | break; | |
074ac8df | 944 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
945 | case NL80211_IFTYPE_AP: |
946 | case NL80211_IFTYPE_AP_VLAN: | |
947 | case NL80211_IFTYPE_WDS: | |
948 | case NL80211_IFTYPE_MESH_POINT: | |
949 | /* bridging OK */ | |
950 | break; | |
951 | case NL80211_IFTYPE_MONITOR: | |
952 | /* monitor can't bridge anyway */ | |
953 | break; | |
954 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 955 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
956 | /* not happening */ |
957 | break; | |
98104fde JB |
958 | case NL80211_IFTYPE_P2P_DEVICE: |
959 | WARN_ON(1); | |
960 | break; | |
ad4bb6f8 JB |
961 | } |
962 | } | |
963 | ||
dbbae26a MK |
964 | if (!err && ntype != otype && netif_running(dev)) { |
965 | cfg80211_update_iface_num(rdev, ntype, 1); | |
966 | cfg80211_update_iface_num(rdev, otype, -1); | |
967 | } | |
968 | ||
3d54d255 JB |
969 | return err; |
970 | } | |
254416aa | 971 | |
95ddc1fc VK |
972 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
973 | { | |
974 | static const u32 __mcs2bitrate[] = { | |
975 | /* control PHY */ | |
976 | [0] = 275, | |
977 | /* SC PHY */ | |
978 | [1] = 3850, | |
979 | [2] = 7700, | |
980 | [3] = 9625, | |
981 | [4] = 11550, | |
982 | [5] = 12512, /* 1251.25 mbps */ | |
983 | [6] = 15400, | |
984 | [7] = 19250, | |
985 | [8] = 23100, | |
986 | [9] = 25025, | |
987 | [10] = 30800, | |
988 | [11] = 38500, | |
989 | [12] = 46200, | |
990 | /* OFDM PHY */ | |
991 | [13] = 6930, | |
992 | [14] = 8662, /* 866.25 mbps */ | |
993 | [15] = 13860, | |
994 | [16] = 17325, | |
995 | [17] = 20790, | |
996 | [18] = 27720, | |
997 | [19] = 34650, | |
998 | [20] = 41580, | |
999 | [21] = 45045, | |
1000 | [22] = 51975, | |
1001 | [23] = 62370, | |
1002 | [24] = 67568, /* 6756.75 mbps */ | |
1003 | /* LP-SC PHY */ | |
1004 | [25] = 6260, | |
1005 | [26] = 8340, | |
1006 | [27] = 11120, | |
1007 | [28] = 12510, | |
1008 | [29] = 16680, | |
1009 | [30] = 22240, | |
1010 | [31] = 25030, | |
1011 | }; | |
1012 | ||
1013 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
1014 | return 0; | |
1015 | ||
1016 | return __mcs2bitrate[rate->mcs]; | |
1017 | } | |
1018 | ||
db9c64cf JB |
1019 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1020 | { | |
1021 | static const u32 base[4][10] = { | |
1022 | { 6500000, | |
1023 | 13000000, | |
1024 | 19500000, | |
1025 | 26000000, | |
1026 | 39000000, | |
1027 | 52000000, | |
1028 | 58500000, | |
1029 | 65000000, | |
1030 | 78000000, | |
1031 | 0, | |
1032 | }, | |
1033 | { 13500000, | |
1034 | 27000000, | |
1035 | 40500000, | |
1036 | 54000000, | |
1037 | 81000000, | |
1038 | 108000000, | |
1039 | 121500000, | |
1040 | 135000000, | |
1041 | 162000000, | |
1042 | 180000000, | |
1043 | }, | |
1044 | { 29300000, | |
1045 | 58500000, | |
1046 | 87800000, | |
1047 | 117000000, | |
1048 | 175500000, | |
1049 | 234000000, | |
1050 | 263300000, | |
1051 | 292500000, | |
1052 | 351000000, | |
1053 | 390000000, | |
1054 | }, | |
1055 | { 58500000, | |
1056 | 117000000, | |
1057 | 175500000, | |
1058 | 234000000, | |
1059 | 351000000, | |
1060 | 468000000, | |
1061 | 526500000, | |
1062 | 585000000, | |
1063 | 702000000, | |
1064 | 780000000, | |
1065 | }, | |
1066 | }; | |
1067 | u32 bitrate; | |
1068 | int idx; | |
1069 | ||
1070 | if (WARN_ON_ONCE(rate->mcs > 9)) | |
1071 | return 0; | |
1072 | ||
1073 | idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH | | |
1074 | RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 : | |
1075 | rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 : | |
1076 | rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 0; | |
1077 | ||
1078 | bitrate = base[idx][rate->mcs]; | |
1079 | bitrate *= rate->nss; | |
1080 | ||
1081 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1082 | bitrate = (bitrate / 9) * 10; | |
1083 | ||
1084 | /* do NOT round down here */ | |
1085 | return (bitrate + 50000) / 100000; | |
1086 | } | |
1087 | ||
8eb41c8d | 1088 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa JL |
1089 | { |
1090 | int modulation, streams, bitrate; | |
1091 | ||
db9c64cf JB |
1092 | if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
1093 | !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) | |
254416aa | 1094 | return rate->legacy; |
95ddc1fc VK |
1095 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1096 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1097 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1098 | return cfg80211_calculate_bitrate_vht(rate); | |
254416aa JL |
1099 | |
1100 | /* the formula below does only work for MCS values smaller than 32 */ | |
2615f375 | 1101 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
254416aa JL |
1102 | return 0; |
1103 | ||
1104 | modulation = rate->mcs & 7; | |
1105 | streams = (rate->mcs >> 3) + 1; | |
1106 | ||
1107 | bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? | |
1108 | 13500000 : 6500000; | |
1109 | ||
1110 | if (modulation < 4) | |
1111 | bitrate *= (modulation + 1); | |
1112 | else if (modulation == 4) | |
1113 | bitrate *= (modulation + 2); | |
1114 | else | |
1115 | bitrate *= (modulation + 3); | |
1116 | ||
1117 | bitrate *= streams; | |
1118 | ||
1119 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1120 | bitrate = (bitrate / 9) * 10; | |
1121 | ||
1122 | /* do NOT round down here */ | |
1123 | return (bitrate + 50000) / 100000; | |
1124 | } | |
8097e149 | 1125 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1126 | |
c216e641 AS |
1127 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1128 | enum ieee80211_p2p_attr_id attr, | |
1129 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1130 | { |
1131 | u8 *out = buf; | |
1132 | u16 attr_remaining = 0; | |
1133 | bool desired_attr = false; | |
1134 | u16 desired_len = 0; | |
1135 | ||
1136 | while (len > 0) { | |
1137 | unsigned int iedatalen; | |
1138 | unsigned int copy; | |
1139 | const u8 *iedata; | |
1140 | ||
1141 | if (len < 2) | |
1142 | return -EILSEQ; | |
1143 | iedatalen = ies[1]; | |
1144 | if (iedatalen + 2 > len) | |
1145 | return -EILSEQ; | |
1146 | ||
1147 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1148 | goto cont; | |
1149 | ||
1150 | if (iedatalen < 4) | |
1151 | goto cont; | |
1152 | ||
1153 | iedata = ies + 2; | |
1154 | ||
1155 | /* check WFA OUI, P2P subtype */ | |
1156 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1157 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1158 | goto cont; | |
1159 | ||
1160 | iedatalen -= 4; | |
1161 | iedata += 4; | |
1162 | ||
1163 | /* check attribute continuation into this IE */ | |
1164 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1165 | if (copy && desired_attr) { | |
1166 | desired_len += copy; | |
1167 | if (out) { | |
1168 | memcpy(out, iedata, min(bufsize, copy)); | |
1169 | out += min(bufsize, copy); | |
1170 | bufsize -= min(bufsize, copy); | |
1171 | } | |
1172 | ||
1173 | ||
1174 | if (copy == attr_remaining) | |
1175 | return desired_len; | |
1176 | } | |
1177 | ||
1178 | attr_remaining -= copy; | |
1179 | if (attr_remaining) | |
1180 | goto cont; | |
1181 | ||
1182 | iedatalen -= copy; | |
1183 | iedata += copy; | |
1184 | ||
1185 | while (iedatalen > 0) { | |
1186 | u16 attr_len; | |
1187 | ||
1188 | /* P2P attribute ID & size must fit */ | |
1189 | if (iedatalen < 3) | |
1190 | return -EILSEQ; | |
1191 | desired_attr = iedata[0] == attr; | |
1192 | attr_len = get_unaligned_le16(iedata + 1); | |
1193 | iedatalen -= 3; | |
1194 | iedata += 3; | |
1195 | ||
1196 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1197 | ||
1198 | if (desired_attr) { | |
1199 | desired_len += copy; | |
1200 | if (out) { | |
1201 | memcpy(out, iedata, min(bufsize, copy)); | |
1202 | out += min(bufsize, copy); | |
1203 | bufsize -= min(bufsize, copy); | |
1204 | } | |
1205 | ||
1206 | if (copy == attr_len) | |
1207 | return desired_len; | |
1208 | } | |
1209 | ||
1210 | iedata += copy; | |
1211 | iedatalen -= copy; | |
1212 | attr_remaining = attr_len - copy; | |
1213 | } | |
1214 | ||
1215 | cont: | |
1216 | len -= ies[1] + 2; | |
1217 | ies += ies[1] + 2; | |
1218 | } | |
1219 | ||
1220 | if (attr_remaining && desired_attr) | |
1221 | return -EILSEQ; | |
1222 | ||
1223 | return -ENOENT; | |
1224 | } | |
1225 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1226 | ||
1ce3e82b JB |
1227 | bool ieee80211_operating_class_to_band(u8 operating_class, |
1228 | enum ieee80211_band *band) | |
1229 | { | |
1230 | switch (operating_class) { | |
1231 | case 112: | |
1232 | case 115 ... 127: | |
1233 | *band = IEEE80211_BAND_5GHZ; | |
1234 | return true; | |
1235 | case 81: | |
1236 | case 82: | |
1237 | case 83: | |
1238 | case 84: | |
1239 | *band = IEEE80211_BAND_2GHZ; | |
1240 | return true; | |
55300a13 VK |
1241 | case 180: |
1242 | *band = IEEE80211_BAND_60GHZ; | |
1243 | return true; | |
1ce3e82b JB |
1244 | } |
1245 | ||
1246 | return false; | |
1247 | } | |
1248 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1249 | ||
56d1893d JB |
1250 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1251 | u32 beacon_int) | |
1252 | { | |
1253 | struct wireless_dev *wdev; | |
1254 | int res = 0; | |
1255 | ||
1256 | if (!beacon_int) | |
1257 | return -EINVAL; | |
1258 | ||
89a54e48 | 1259 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
56d1893d JB |
1260 | if (!wdev->beacon_interval) |
1261 | continue; | |
1262 | if (wdev->beacon_interval != beacon_int) { | |
1263 | res = -EINVAL; | |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | ||
56d1893d JB |
1268 | return res; |
1269 | } | |
7527a782 | 1270 | |
65a124dd MK |
1271 | int cfg80211_iter_combinations(struct wiphy *wiphy, |
1272 | const int num_different_channels, | |
1273 | const u8 radar_detect, | |
1274 | const int iftype_num[NUM_NL80211_IFTYPES], | |
1275 | void (*iter)(const struct ieee80211_iface_combination *c, | |
1276 | void *data), | |
1277 | void *data) | |
cb2d956d | 1278 | { |
8c48b50a FF |
1279 | const struct ieee80211_regdomain *regdom; |
1280 | enum nl80211_dfs_regions region = 0; | |
cb2d956d LC |
1281 | int i, j, iftype; |
1282 | int num_interfaces = 0; | |
1283 | u32 used_iftypes = 0; | |
1284 | ||
8c48b50a FF |
1285 | if (radar_detect) { |
1286 | rcu_read_lock(); | |
1287 | regdom = rcu_dereference(cfg80211_regdomain); | |
1288 | if (regdom) | |
1289 | region = regdom->dfs_region; | |
1290 | rcu_read_unlock(); | |
1291 | } | |
1292 | ||
cb2d956d LC |
1293 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
1294 | num_interfaces += iftype_num[iftype]; | |
1295 | if (iftype_num[iftype] > 0 && | |
1296 | !(wiphy->software_iftypes & BIT(iftype))) | |
1297 | used_iftypes |= BIT(iftype); | |
1298 | } | |
1299 | ||
1300 | for (i = 0; i < wiphy->n_iface_combinations; i++) { | |
1301 | const struct ieee80211_iface_combination *c; | |
1302 | struct ieee80211_iface_limit *limits; | |
1303 | u32 all_iftypes = 0; | |
1304 | ||
1305 | c = &wiphy->iface_combinations[i]; | |
1306 | ||
1307 | if (num_interfaces > c->max_interfaces) | |
1308 | continue; | |
1309 | if (num_different_channels > c->num_different_channels) | |
1310 | continue; | |
1311 | ||
1312 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, | |
1313 | GFP_KERNEL); | |
1314 | if (!limits) | |
1315 | return -ENOMEM; | |
1316 | ||
1317 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1318 | if (wiphy->software_iftypes & BIT(iftype)) | |
1319 | continue; | |
1320 | for (j = 0; j < c->n_limits; j++) { | |
1321 | all_iftypes |= limits[j].types; | |
1322 | if (!(limits[j].types & BIT(iftype))) | |
1323 | continue; | |
1324 | if (limits[j].max < iftype_num[iftype]) | |
1325 | goto cont; | |
1326 | limits[j].max -= iftype_num[iftype]; | |
1327 | } | |
1328 | } | |
1329 | ||
65d26f29 | 1330 | if (radar_detect != (c->radar_detect_widths & radar_detect)) |
cb2d956d LC |
1331 | goto cont; |
1332 | ||
8c48b50a FF |
1333 | if (radar_detect && c->radar_detect_regions && |
1334 | !(c->radar_detect_regions & BIT(region))) | |
1335 | goto cont; | |
1336 | ||
cb2d956d LC |
1337 | /* Finally check that all iftypes that we're currently |
1338 | * using are actually part of this combination. If they | |
1339 | * aren't then we can't use this combination and have | |
1340 | * to continue to the next. | |
1341 | */ | |
1342 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1343 | goto cont; | |
1344 | ||
1345 | /* This combination covered all interface types and | |
1346 | * supported the requested numbers, so we're good. | |
1347 | */ | |
65a124dd MK |
1348 | |
1349 | (*iter)(c, data); | |
cb2d956d LC |
1350 | cont: |
1351 | kfree(limits); | |
1352 | } | |
1353 | ||
65a124dd MK |
1354 | return 0; |
1355 | } | |
1356 | EXPORT_SYMBOL(cfg80211_iter_combinations); | |
1357 | ||
1358 | static void | |
1359 | cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, | |
1360 | void *data) | |
1361 | { | |
1362 | int *num = data; | |
1363 | (*num)++; | |
1364 | } | |
1365 | ||
1366 | int cfg80211_check_combinations(struct wiphy *wiphy, | |
1367 | const int num_different_channels, | |
1368 | const u8 radar_detect, | |
1369 | const int iftype_num[NUM_NL80211_IFTYPES]) | |
1370 | { | |
1371 | int err, num = 0; | |
1372 | ||
1373 | err = cfg80211_iter_combinations(wiphy, num_different_channels, | |
1374 | radar_detect, iftype_num, | |
1375 | cfg80211_iter_sum_ifcombs, &num); | |
1376 | if (err) | |
1377 | return err; | |
1378 | if (num == 0) | |
1379 | return -EBUSY; | |
1380 | ||
1381 | return 0; | |
cb2d956d LC |
1382 | } |
1383 | EXPORT_SYMBOL(cfg80211_check_combinations); | |
1384 | ||
d4e50c59 MK |
1385 | int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
1386 | struct wireless_dev *wdev, | |
1387 | enum nl80211_iftype iftype, | |
1388 | struct ieee80211_channel *chan, | |
11c4a075 SW |
1389 | enum cfg80211_chan_mode chanmode, |
1390 | u8 radar_detect) | |
7527a782 JB |
1391 | { |
1392 | struct wireless_dev *wdev_iter; | |
1393 | int num[NUM_NL80211_IFTYPES]; | |
d4e50c59 MK |
1394 | struct ieee80211_channel |
1395 | *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; | |
1396 | struct ieee80211_channel *ch; | |
1397 | enum cfg80211_chan_mode chmode; | |
1398 | int num_different_channels = 0; | |
7527a782 | 1399 | int total = 1; |
cb2d956d | 1400 | int i; |
7527a782 JB |
1401 | |
1402 | ASSERT_RTNL(); | |
1403 | ||
11c4a075 SW |
1404 | if (WARN_ON(hweight32(radar_detect) > 1)) |
1405 | return -EINVAL; | |
1406 | ||
7b2106ae | 1407 | if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) |
11c4a075 SW |
1408 | return -EINVAL; |
1409 | ||
7527a782 | 1410 | /* Always allow software iftypes */ |
11c4a075 SW |
1411 | if (rdev->wiphy.software_iftypes & BIT(iftype)) { |
1412 | if (radar_detect) | |
1413 | return -EINVAL; | |
7527a782 | 1414 | return 0; |
11c4a075 | 1415 | } |
7527a782 | 1416 | |
7527a782 | 1417 | memset(num, 0, sizeof(num)); |
d4e50c59 | 1418 | memset(used_channels, 0, sizeof(used_channels)); |
7527a782 JB |
1419 | |
1420 | num[iftype] = 1; | |
1421 | ||
73de86a3 LC |
1422 | /* TODO: We'll probably not need this anymore, since this |
1423 | * should only be called with CHAN_MODE_UNDEFINED. There are | |
1424 | * still a couple of pending calls where other chanmodes are | |
1425 | * used, but we should get rid of them. | |
1426 | */ | |
d4e50c59 MK |
1427 | switch (chanmode) { |
1428 | case CHAN_MODE_UNDEFINED: | |
1429 | break; | |
1430 | case CHAN_MODE_SHARED: | |
1431 | WARN_ON(!chan); | |
1432 | used_channels[0] = chan; | |
1433 | num_different_channels++; | |
1434 | break; | |
1435 | case CHAN_MODE_EXCLUSIVE: | |
1436 | num_different_channels++; | |
1437 | break; | |
1438 | } | |
1439 | ||
89a54e48 | 1440 | list_for_each_entry(wdev_iter, &rdev->wdev_list, list) { |
7527a782 JB |
1441 | if (wdev_iter == wdev) |
1442 | continue; | |
6e3ab554 | 1443 | if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) { |
98104fde JB |
1444 | if (!wdev_iter->p2p_started) |
1445 | continue; | |
6e3ab554 JB |
1446 | } else if (wdev_iter->netdev) { |
1447 | if (!netif_running(wdev_iter->netdev)) | |
1448 | continue; | |
98104fde JB |
1449 | } else { |
1450 | WARN_ON(1); | |
1451 | } | |
7527a782 JB |
1452 | |
1453 | if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) | |
1454 | continue; | |
1455 | ||
8e95ea49 JB |
1456 | /* |
1457 | * We may be holding the "wdev" mutex, but now need to lock | |
1458 | * wdev_iter. This is OK because once we get here wdev_iter | |
1459 | * is not wdev (tested above), but we need to use the nested | |
1460 | * locking for lockdep. | |
1461 | */ | |
1462 | mutex_lock_nested(&wdev_iter->mtx, 1); | |
1463 | __acquire(wdev_iter->mtx); | |
9e0e2961 | 1464 | cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect); |
8e95ea49 | 1465 | wdev_unlock(wdev_iter); |
d4e50c59 MK |
1466 | |
1467 | switch (chmode) { | |
1468 | case CHAN_MODE_UNDEFINED: | |
1469 | break; | |
1470 | case CHAN_MODE_SHARED: | |
1471 | for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) | |
1472 | if (!used_channels[i] || used_channels[i] == ch) | |
1473 | break; | |
1474 | ||
e4e32459 | 1475 | if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
d4e50c59 | 1476 | return -EBUSY; |
d4e50c59 MK |
1477 | |
1478 | if (used_channels[i] == NULL) { | |
1479 | used_channels[i] = ch; | |
1480 | num_different_channels++; | |
1481 | } | |
1482 | break; | |
1483 | case CHAN_MODE_EXCLUSIVE: | |
1484 | num_different_channels++; | |
1485 | break; | |
1486 | } | |
1487 | ||
7527a782 JB |
1488 | num[wdev_iter->iftype]++; |
1489 | total++; | |
1490 | } | |
7527a782 | 1491 | |
11c4a075 | 1492 | if (total == 1 && !radar_detect) |
8e8b41f9 JB |
1493 | return 0; |
1494 | ||
cb2d956d LC |
1495 | return cfg80211_check_combinations(&rdev->wiphy, num_different_channels, |
1496 | radar_detect, num); | |
7527a782 | 1497 | } |
34850ab2 JB |
1498 | |
1499 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, | |
1500 | const u8 *rates, unsigned int n_rates, | |
1501 | u32 *mask) | |
1502 | { | |
1503 | int i, j; | |
1504 | ||
a401d2bb JB |
1505 | if (!sband) |
1506 | return -EINVAL; | |
1507 | ||
34850ab2 JB |
1508 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1509 | return -EINVAL; | |
1510 | ||
1511 | *mask = 0; | |
1512 | ||
1513 | for (i = 0; i < n_rates; i++) { | |
1514 | int rate = (rates[i] & 0x7f) * 5; | |
1515 | bool found = false; | |
1516 | ||
1517 | for (j = 0; j < sband->n_bitrates; j++) { | |
1518 | if (sband->bitrates[j].bitrate == rate) { | |
1519 | found = true; | |
1520 | *mask |= BIT(j); | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | if (!found) | |
1525 | return -EINVAL; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * mask must have at least one bit set here since we | |
1530 | * didn't accept a 0-length rates array nor allowed | |
1531 | * entries in the array that didn't exist | |
1532 | */ | |
1533 | ||
1534 | return 0; | |
1535 | } | |
11a2a357 | 1536 | |
bdfbec2d IP |
1537 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1538 | { | |
1539 | enum ieee80211_band band; | |
1540 | unsigned int n_channels = 0; | |
1541 | ||
1542 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
1543 | if (wiphy->bands[band]) | |
1544 | n_channels += wiphy->bands[band]->n_channels; | |
1545 | ||
1546 | return n_channels; | |
1547 | } | |
1548 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1549 | ||
7406353d AQ |
1550 | int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, |
1551 | struct station_info *sinfo) | |
1552 | { | |
1553 | struct cfg80211_registered_device *rdev; | |
1554 | struct wireless_dev *wdev; | |
1555 | ||
1556 | wdev = dev->ieee80211_ptr; | |
1557 | if (!wdev) | |
1558 | return -EOPNOTSUPP; | |
1559 | ||
1560 | rdev = wiphy_to_rdev(wdev->wiphy); | |
1561 | if (!rdev->ops->get_station) | |
1562 | return -EOPNOTSUPP; | |
1563 | ||
1564 | return rdev_get_station(rdev, dev, mac_addr, sinfo); | |
1565 | } | |
1566 | EXPORT_SYMBOL(cfg80211_get_station); | |
1567 | ||
11a2a357 JB |
1568 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1569 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1570 | const unsigned char rfc1042_header[] __aligned(2) = | |
1571 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1572 | EXPORT_SYMBOL(rfc1042_header); | |
1573 | ||
1574 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1575 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1576 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1577 | EXPORT_SYMBOL(bridge_tunnel_header); |