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> |
c6ca5e28 | 13 | #include <linux/if_vlan.h> |
8318d78a | 14 | #include "core.h" |
e35e4d28 HG |
15 | #include "rdev-ops.h" |
16 | ||
8318d78a | 17 | |
bd815252 JB |
18 | struct ieee80211_rate * |
19 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 20 | u32 basic_rates, int bitrate) |
bd815252 JB |
21 | { |
22 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
23 | int i; | |
24 | ||
25 | for (i = 0; i < sband->n_bitrates; i++) { | |
26 | if (!(basic_rates & BIT(i))) | |
27 | continue; | |
28 | if (sband->bitrates[i].bitrate > bitrate) | |
29 | continue; | |
30 | result = &sband->bitrates[i]; | |
31 | } | |
32 | ||
33 | return result; | |
34 | } | |
35 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
36 | ||
74608aca SW |
37 | u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband, |
38 | enum nl80211_bss_scan_width scan_width) | |
b422c6cd AN |
39 | { |
40 | struct ieee80211_rate *bitrates; | |
41 | u32 mandatory_rates = 0; | |
42 | enum ieee80211_rate_flags mandatory_flag; | |
43 | int i; | |
44 | ||
45 | if (WARN_ON(!sband)) | |
46 | return 1; | |
47 | ||
74608aca SW |
48 | if (sband->band == IEEE80211_BAND_2GHZ) { |
49 | if (scan_width == NL80211_BSS_CHAN_WIDTH_5 || | |
50 | scan_width == NL80211_BSS_CHAN_WIDTH_10) | |
51 | mandatory_flag = IEEE80211_RATE_MANDATORY_G; | |
52 | else | |
53 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
54 | } else { | |
b422c6cd | 55 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; |
74608aca | 56 | } |
b422c6cd AN |
57 | |
58 | bitrates = sband->bitrates; | |
59 | for (i = 0; i < sband->n_bitrates; i++) | |
60 | if (bitrates[i].flags & mandatory_flag) | |
61 | mandatory_rates |= BIT(i); | |
62 | return mandatory_rates; | |
63 | } | |
64 | EXPORT_SYMBOL(ieee80211_mandatory_rates); | |
65 | ||
59eb21a6 | 66 | int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
8318d78a | 67 | { |
59eb21a6 BR |
68 | /* see 802.11 17.3.8.3.2 and Annex J |
69 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
70 | if (chan <= 0) |
71 | return 0; /* not supported */ | |
72 | switch (band) { | |
73 | case IEEE80211_BAND_2GHZ: | |
59eb21a6 BR |
74 | if (chan == 14) |
75 | return 2484; | |
76 | else if (chan < 14) | |
77 | return 2407 + chan * 5; | |
3a0c52a6 VK |
78 | break; |
79 | case IEEE80211_BAND_5GHZ: | |
80 | if (chan >= 182 && chan <= 196) | |
81 | return 4000 + chan * 5; | |
59eb21a6 | 82 | else |
3a0c52a6 VK |
83 | return 5000 + chan * 5; |
84 | break; | |
85 | case IEEE80211_BAND_60GHZ: | |
86 | if (chan < 5) | |
87 | return 56160 + chan * 2160; | |
88 | break; | |
89 | default: | |
90 | ; | |
59eb21a6 | 91 | } |
3a0c52a6 | 92 | return 0; /* not supported */ |
8318d78a JB |
93 | } |
94 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
95 | ||
96 | int ieee80211_frequency_to_channel(int freq) | |
97 | { | |
59eb21a6 | 98 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
99 | if (freq == 2484) |
100 | return 14; | |
59eb21a6 | 101 | else if (freq < 2484) |
8318d78a | 102 | return (freq - 2407) / 5; |
59eb21a6 BR |
103 | else if (freq >= 4910 && freq <= 4980) |
104 | return (freq - 4000) / 5; | |
3a0c52a6 | 105 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 106 | return (freq - 5000) / 5; |
3a0c52a6 VK |
107 | else if (freq >= 58320 && freq <= 64800) |
108 | return (freq - 56160) / 2160; | |
109 | else | |
110 | return 0; | |
8318d78a JB |
111 | } |
112 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
113 | ||
6c507cd0 JB |
114 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
115 | int freq) | |
906c730a JB |
116 | { |
117 | enum ieee80211_band band; | |
118 | struct ieee80211_supported_band *sband; | |
119 | int i; | |
120 | ||
121 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
122 | sband = wiphy->bands[band]; | |
123 | ||
124 | if (!sband) | |
125 | continue; | |
126 | ||
127 | for (i = 0; i < sband->n_channels; i++) { | |
128 | if (sband->channels[i].center_freq == freq) | |
129 | return &sband->channels[i]; | |
130 | } | |
131 | } | |
132 | ||
133 | return NULL; | |
134 | } | |
6c507cd0 | 135 | EXPORT_SYMBOL(__ieee80211_get_channel); |
906c730a | 136 | |
8318d78a JB |
137 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
138 | enum ieee80211_band band) | |
139 | { | |
140 | int i, want; | |
141 | ||
142 | switch (band) { | |
143 | case IEEE80211_BAND_5GHZ: | |
144 | want = 3; | |
145 | for (i = 0; i < sband->n_bitrates; i++) { | |
146 | if (sband->bitrates[i].bitrate == 60 || | |
147 | sband->bitrates[i].bitrate == 120 || | |
148 | sband->bitrates[i].bitrate == 240) { | |
149 | sband->bitrates[i].flags |= | |
150 | IEEE80211_RATE_MANDATORY_A; | |
151 | want--; | |
152 | } | |
153 | } | |
154 | WARN_ON(want); | |
155 | break; | |
156 | case IEEE80211_BAND_2GHZ: | |
157 | want = 7; | |
158 | for (i = 0; i < sband->n_bitrates; i++) { | |
159 | if (sband->bitrates[i].bitrate == 10) { | |
160 | sband->bitrates[i].flags |= | |
161 | IEEE80211_RATE_MANDATORY_B | | |
162 | IEEE80211_RATE_MANDATORY_G; | |
163 | want--; | |
164 | } | |
165 | ||
166 | if (sband->bitrates[i].bitrate == 20 || | |
167 | sband->bitrates[i].bitrate == 55 || | |
168 | sband->bitrates[i].bitrate == 110 || | |
169 | sband->bitrates[i].bitrate == 60 || | |
170 | sband->bitrates[i].bitrate == 120 || | |
171 | sband->bitrates[i].bitrate == 240) { | |
172 | sband->bitrates[i].flags |= | |
173 | IEEE80211_RATE_MANDATORY_G; | |
174 | want--; | |
175 | } | |
176 | ||
aac09fbf JB |
177 | if (sband->bitrates[i].bitrate != 10 && |
178 | sband->bitrates[i].bitrate != 20 && | |
179 | sband->bitrates[i].bitrate != 55 && | |
180 | sband->bitrates[i].bitrate != 110) | |
8318d78a JB |
181 | sband->bitrates[i].flags |= |
182 | IEEE80211_RATE_ERP_G; | |
183 | } | |
406f2388 | 184 | WARN_ON(want != 0 && want != 3 && want != 6); |
8318d78a | 185 | break; |
3a0c52a6 VK |
186 | case IEEE80211_BAND_60GHZ: |
187 | /* check for mandatory HT MCS 1..4 */ | |
188 | WARN_ON(!sband->ht_cap.ht_supported); | |
189 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
190 | break; | |
8318d78a JB |
191 | case IEEE80211_NUM_BANDS: |
192 | WARN_ON(1); | |
193 | break; | |
194 | } | |
195 | } | |
196 | ||
197 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
198 | { | |
199 | enum ieee80211_band band; | |
200 | ||
201 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
202 | if (wiphy->bands[band]) | |
203 | set_mandatory_flags_band(wiphy->bands[band], band); | |
204 | } | |
08645126 | 205 | |
38ba3c57 JM |
206 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
207 | { | |
208 | int i; | |
209 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
210 | if (cipher == wiphy->cipher_suites[i]) | |
211 | return true; | |
212 | return false; | |
213 | } | |
214 | ||
fffd0934 JB |
215 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
216 | struct key_params *params, int key_idx, | |
e31b8213 | 217 | bool pairwise, const u8 *mac_addr) |
08645126 JB |
218 | { |
219 | if (key_idx > 5) | |
220 | return -EINVAL; | |
221 | ||
e31b8213 JB |
222 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
223 | return -EINVAL; | |
224 | ||
225 | if (pairwise && !mac_addr) | |
226 | return -EINVAL; | |
227 | ||
08645126 JB |
228 | /* |
229 | * Disallow pairwise keys with non-zero index unless it's WEP | |
45cbad6a JO |
230 | * or a vendor specific cipher (because current deployments use |
231 | * pairwise WEP keys with non-zero indices and for vendor specific | |
232 | * ciphers this should be validated in the driver or hardware level | |
233 | * - but 802.11i clearly specifies to use zero) | |
08645126 | 234 | */ |
e31b8213 | 235 | if (pairwise && key_idx && |
45cbad6a JO |
236 | ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
237 | (params->cipher == WLAN_CIPHER_SUITE_CCMP) || | |
238 | (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) | |
08645126 JB |
239 | return -EINVAL; |
240 | ||
08645126 JB |
241 | switch (params->cipher) { |
242 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 243 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
244 | return -EINVAL; |
245 | break; | |
246 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 247 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
248 | return -EINVAL; |
249 | break; | |
250 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 251 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
252 | return -EINVAL; |
253 | break; | |
254 | case WLAN_CIPHER_SUITE_WEP104: | |
8fc0fee0 | 255 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
256 | return -EINVAL; |
257 | break; | |
258 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 259 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
260 | return -EINVAL; |
261 | break; | |
262 | default: | |
7d64b7cc JB |
263 | /* |
264 | * We don't know anything about this algorithm, | |
265 | * allow using it -- but the driver must check | |
266 | * all parameters! We still check below whether | |
267 | * or not the driver supports this algorithm, | |
268 | * of course. | |
269 | */ | |
270 | break; | |
08645126 JB |
271 | } |
272 | ||
9f26a952 JM |
273 | if (params->seq) { |
274 | switch (params->cipher) { | |
275 | case WLAN_CIPHER_SUITE_WEP40: | |
276 | case WLAN_CIPHER_SUITE_WEP104: | |
277 | /* These ciphers do not use key sequence */ | |
278 | return -EINVAL; | |
279 | case WLAN_CIPHER_SUITE_TKIP: | |
280 | case WLAN_CIPHER_SUITE_CCMP: | |
281 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
282 | if (params->seq_len != 6) | |
283 | return -EINVAL; | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
38ba3c57 | 288 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
289 | return -EINVAL; |
290 | ||
08645126 JB |
291 | return 0; |
292 | } | |
e31a16d6 | 293 | |
633adf1a | 294 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
295 | { |
296 | unsigned int hdrlen = 24; | |
297 | ||
298 | if (ieee80211_is_data(fc)) { | |
299 | if (ieee80211_has_a4(fc)) | |
300 | hdrlen = 30; | |
d0dd2de0 | 301 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 302 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
303 | if (ieee80211_has_order(fc)) |
304 | hdrlen += IEEE80211_HT_CTL_LEN; | |
305 | } | |
e31a16d6 ZY |
306 | goto out; |
307 | } | |
308 | ||
309 | if (ieee80211_is_ctl(fc)) { | |
310 | /* | |
311 | * ACK and CTS are 10 bytes, all others 16. To see how | |
312 | * to get this condition consider | |
313 | * subtype mask: 0b0000000011110000 (0x00F0) | |
314 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
315 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
316 | * bits that matter: ^^^ (0x00E0) | |
317 | * value of those: 0b0000000011000000 (0x00C0) | |
318 | */ | |
319 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
320 | hdrlen = 10; | |
321 | else | |
322 | hdrlen = 16; | |
323 | } | |
324 | out: | |
325 | return hdrlen; | |
326 | } | |
327 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
328 | ||
329 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
330 | { | |
331 | const struct ieee80211_hdr *hdr = | |
332 | (const struct ieee80211_hdr *)skb->data; | |
333 | unsigned int hdrlen; | |
334 | ||
335 | if (unlikely(skb->len < 10)) | |
336 | return 0; | |
337 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
338 | if (unlikely(hdrlen > skb->len)) | |
339 | return 0; | |
340 | return hdrlen; | |
341 | } | |
342 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
343 | ||
9b395bc3 | 344 | unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
e31a16d6 ZY |
345 | { |
346 | int ae = meshhdr->flags & MESH_FLAGS_AE; | |
7dd111e8 | 347 | /* 802.11-2012, 8.2.4.7.3 */ |
e31a16d6 | 348 | switch (ae) { |
7dd111e8 | 349 | default: |
e31a16d6 ZY |
350 | case 0: |
351 | return 6; | |
3c5772a5 | 352 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 353 | return 12; |
3c5772a5 | 354 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 355 | return 18; |
e31a16d6 ZY |
356 | } |
357 | } | |
9b395bc3 | 358 | EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
e31a16d6 | 359 | |
eaf85ca7 | 360 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
361 | enum nl80211_iftype iftype) |
362 | { | |
363 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
364 | u16 hdrlen, ethertype; | |
365 | u8 *payload; | |
366 | u8 dst[ETH_ALEN]; | |
367 | u8 src[ETH_ALEN] __aligned(2); | |
368 | ||
369 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
370 | return -1; | |
371 | ||
372 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
373 | ||
374 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
375 | * header | |
376 | * IEEE 802.11 address fields: | |
377 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
378 | * 0 0 DA SA BSSID n/a | |
379 | * 0 1 DA BSSID SA n/a | |
380 | * 1 0 BSSID SA DA n/a | |
381 | * 1 1 RA TA DA SA | |
382 | */ | |
383 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); | |
384 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); | |
385 | ||
386 | switch (hdr->frame_control & | |
387 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
388 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
389 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
390 | iftype != NL80211_IFTYPE_AP_VLAN && |
391 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
392 | return -1; |
393 | break; | |
394 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
395 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
396 | iftype != NL80211_IFTYPE_MESH_POINT && |
397 | iftype != NL80211_IFTYPE_AP_VLAN && | |
398 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
399 | return -1; |
400 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
401 | struct ieee80211s_hdr *meshdr = | |
402 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
403 | /* make sure meshdr->flags is on the linear part */ |
404 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
405 | return -1; | |
7dd111e8 JB |
406 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
407 | return -1; | |
e31a16d6 | 408 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
409 | skb_copy_bits(skb, hdrlen + |
410 | offsetof(struct ieee80211s_hdr, eaddr1), | |
411 | dst, ETH_ALEN); | |
412 | skb_copy_bits(skb, hdrlen + | |
413 | offsetof(struct ieee80211s_hdr, eaddr2), | |
414 | src, ETH_ALEN); | |
e31a16d6 | 415 | } |
e3cf8b3f | 416 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
e31a16d6 ZY |
417 | } |
418 | break; | |
419 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 420 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
421 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
422 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
e31a16d6 | 423 | (is_multicast_ether_addr(dst) && |
4c764729 | 424 | ether_addr_equal(src, addr))) |
e31a16d6 | 425 | return -1; |
3c5772a5 JC |
426 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
427 | struct ieee80211s_hdr *meshdr = | |
428 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
429 | /* make sure meshdr->flags is on the linear part */ |
430 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
431 | return -1; | |
7dd111e8 JB |
432 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) |
433 | return -1; | |
3c5772a5 | 434 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
435 | skb_copy_bits(skb, hdrlen + |
436 | offsetof(struct ieee80211s_hdr, eaddr1), | |
437 | src, ETH_ALEN); | |
438 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); | |
3c5772a5 | 439 | } |
e31a16d6 ZY |
440 | break; |
441 | case cpu_to_le16(0): | |
941c93cd AN |
442 | if (iftype != NL80211_IFTYPE_ADHOC && |
443 | iftype != NL80211_IFTYPE_STATION) | |
444 | return -1; | |
e31a16d6 ZY |
445 | break; |
446 | } | |
447 | ||
e3cf8b3f | 448 | if (!pskb_may_pull(skb, hdrlen + 8)) |
e31a16d6 ZY |
449 | return -1; |
450 | ||
451 | payload = skb->data + hdrlen; | |
452 | ethertype = (payload[6] << 8) | payload[7]; | |
453 | ||
4c764729 | 454 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
e31a16d6 | 455 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
4c764729 | 456 | ether_addr_equal(payload, bridge_tunnel_header))) { |
e31a16d6 ZY |
457 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
458 | * replace EtherType */ | |
459 | skb_pull(skb, hdrlen + 6); | |
460 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
461 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
462 | } else { | |
463 | struct ethhdr *ehdr; | |
464 | __be16 len; | |
465 | ||
466 | skb_pull(skb, hdrlen); | |
467 | len = htons(skb->len); | |
468 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
469 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
470 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
471 | ehdr->h_proto = len; | |
472 | } | |
473 | return 0; | |
474 | } | |
475 | EXPORT_SYMBOL(ieee80211_data_to_8023); | |
476 | ||
eaf85ca7 | 477 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
478 | enum nl80211_iftype iftype, u8 *bssid, bool qos) |
479 | { | |
480 | struct ieee80211_hdr hdr; | |
481 | u16 hdrlen, ethertype; | |
482 | __le16 fc; | |
483 | const u8 *encaps_data; | |
484 | int encaps_len, skip_header_bytes; | |
485 | int nh_pos, h_pos; | |
486 | int head_need; | |
487 | ||
488 | if (unlikely(skb->len < ETH_HLEN)) | |
489 | return -EINVAL; | |
490 | ||
491 | nh_pos = skb_network_header(skb) - skb->data; | |
492 | h_pos = skb_transport_header(skb) - skb->data; | |
493 | ||
494 | /* convert Ethernet header to proper 802.11 header (based on | |
495 | * operation mode) */ | |
496 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
497 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
498 | ||
499 | switch (iftype) { | |
500 | case NL80211_IFTYPE_AP: | |
501 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 502 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
503 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
504 | /* DA BSSID SA */ | |
505 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
506 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
507 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
508 | hdrlen = 24; | |
509 | break; | |
510 | case NL80211_IFTYPE_STATION: | |
074ac8df | 511 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
512 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
513 | /* BSSID SA DA */ | |
514 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
515 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
516 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
517 | hdrlen = 24; | |
518 | break; | |
519 | case NL80211_IFTYPE_ADHOC: | |
520 | /* DA SA BSSID */ | |
521 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
522 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
523 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
524 | hdrlen = 24; | |
525 | break; | |
526 | default: | |
527 | return -EOPNOTSUPP; | |
528 | } | |
529 | ||
530 | if (qos) { | |
531 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
532 | hdrlen += 2; | |
533 | } | |
534 | ||
535 | hdr.frame_control = fc; | |
536 | hdr.duration_id = 0; | |
537 | hdr.seq_ctrl = 0; | |
538 | ||
539 | skip_header_bytes = ETH_HLEN; | |
540 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
541 | encaps_data = bridge_tunnel_header; | |
542 | encaps_len = sizeof(bridge_tunnel_header); | |
543 | skip_header_bytes -= 2; | |
e5c5d22e | 544 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e31a16d6 ZY |
545 | encaps_data = rfc1042_header; |
546 | encaps_len = sizeof(rfc1042_header); | |
547 | skip_header_bytes -= 2; | |
548 | } else { | |
549 | encaps_data = NULL; | |
550 | encaps_len = 0; | |
551 | } | |
552 | ||
553 | skb_pull(skb, skip_header_bytes); | |
554 | nh_pos -= skip_header_bytes; | |
555 | h_pos -= skip_header_bytes; | |
556 | ||
557 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
558 | ||
559 | if (head_need > 0 || skb_cloned(skb)) { | |
560 | head_need = max(head_need, 0); | |
561 | if (head_need) | |
562 | skb_orphan(skb); | |
563 | ||
24616152 | 564 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 565 | return -ENOMEM; |
24616152 | 566 | |
e31a16d6 ZY |
567 | skb->truesize += head_need; |
568 | } | |
569 | ||
570 | if (encaps_data) { | |
571 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
572 | nh_pos += encaps_len; | |
573 | h_pos += encaps_len; | |
574 | } | |
575 | ||
576 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
577 | ||
578 | nh_pos += hdrlen; | |
579 | h_pos += hdrlen; | |
580 | ||
581 | /* Update skb pointers to various headers since this modified frame | |
582 | * is going to go through Linux networking code that may potentially | |
583 | * need things like pointer to IP header. */ | |
584 | skb_set_mac_header(skb, 0); | |
585 | skb_set_network_header(skb, nh_pos); | |
586 | skb_set_transport_header(skb, h_pos); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
591 | ||
eaf85ca7 ZY |
592 | |
593 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
594 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad YAP |
595 | const unsigned int extra_headroom, |
596 | bool has_80211_header) | |
eaf85ca7 ZY |
597 | { |
598 | struct sk_buff *frame = NULL; | |
599 | u16 ethertype; | |
600 | u8 *payload; | |
601 | const struct ethhdr *eth; | |
602 | int remaining, err; | |
603 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
604 | ||
8b3becad YAP |
605 | if (has_80211_header) { |
606 | err = ieee80211_data_to_8023(skb, addr, iftype); | |
607 | if (err) | |
608 | goto out; | |
eaf85ca7 | 609 | |
8b3becad YAP |
610 | /* skip the wrapping header */ |
611 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
612 | if (!eth) | |
613 | goto out; | |
614 | } else { | |
615 | eth = (struct ethhdr *) skb->data; | |
616 | } | |
eaf85ca7 ZY |
617 | |
618 | while (skb != frame) { | |
619 | u8 padding; | |
620 | __be16 len = eth->h_proto; | |
621 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
622 | ||
623 | remaining = skb->len; | |
624 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
625 | memcpy(src, eth->h_source, ETH_ALEN); | |
626 | ||
627 | padding = (4 - subframe_len) & 0x3; | |
628 | /* the last MSDU has no padding */ | |
629 | if (subframe_len > remaining) | |
630 | goto purge; | |
631 | ||
632 | skb_pull(skb, sizeof(struct ethhdr)); | |
633 | /* reuse skb for the last subframe */ | |
634 | if (remaining <= subframe_len + padding) | |
635 | frame = skb; | |
636 | else { | |
637 | unsigned int hlen = ALIGN(extra_headroom, 4); | |
638 | /* | |
639 | * Allocate and reserve two bytes more for payload | |
640 | * alignment since sizeof(struct ethhdr) is 14. | |
641 | */ | |
642 | frame = dev_alloc_skb(hlen + subframe_len + 2); | |
643 | if (!frame) | |
644 | goto purge; | |
645 | ||
646 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
647 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
648 | ntohs(len)); | |
649 | ||
650 | eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + | |
651 | padding); | |
652 | if (!eth) { | |
653 | dev_kfree_skb(frame); | |
654 | goto purge; | |
655 | } | |
656 | } | |
657 | ||
658 | skb_reset_network_header(frame); | |
659 | frame->dev = skb->dev; | |
660 | frame->priority = skb->priority; | |
661 | ||
662 | payload = frame->data; | |
663 | ethertype = (payload[6] << 8) | payload[7]; | |
664 | ||
ac422d3c | 665 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 666 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 667 | ether_addr_equal(payload, bridge_tunnel_header))) { |
eaf85ca7 ZY |
668 | /* remove RFC1042 or Bridge-Tunnel |
669 | * encapsulation and replace EtherType */ | |
670 | skb_pull(frame, 6); | |
671 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
672 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
673 | } else { | |
674 | memcpy(skb_push(frame, sizeof(__be16)), &len, | |
675 | sizeof(__be16)); | |
676 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
677 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
678 | } | |
679 | __skb_queue_tail(list, frame); | |
680 | } | |
681 | ||
682 | return; | |
683 | ||
684 | purge: | |
685 | __skb_queue_purge(list); | |
686 | out: | |
687 | dev_kfree_skb(skb); | |
688 | } | |
689 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
690 | ||
e31a16d6 | 691 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
fa9ffc74 KP |
692 | unsigned int cfg80211_classify8021d(struct sk_buff *skb, |
693 | struct cfg80211_qos_map *qos_map) | |
e31a16d6 ZY |
694 | { |
695 | unsigned int dscp; | |
c6ca5e28 | 696 | unsigned char vlan_priority; |
e31a16d6 ZY |
697 | |
698 | /* skb->priority values from 256->263 are magic values to | |
699 | * directly indicate a specific 802.1d priority. This is used | |
700 | * to allow 802.1d priority to be passed directly in from VLAN | |
701 | * tags, etc. | |
702 | */ | |
703 | if (skb->priority >= 256 && skb->priority <= 263) | |
704 | return skb->priority - 256; | |
705 | ||
c6ca5e28 V |
706 | if (vlan_tx_tag_present(skb)) { |
707 | vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK) | |
708 | >> VLAN_PRIO_SHIFT; | |
709 | if (vlan_priority > 0) | |
710 | return vlan_priority; | |
711 | } | |
712 | ||
e31a16d6 ZY |
713 | switch (skb->protocol) { |
714 | case htons(ETH_P_IP): | |
b156579b DT |
715 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
716 | break; | |
717 | case htons(ETH_P_IPV6): | |
718 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 ZY |
719 | break; |
720 | default: | |
721 | return 0; | |
722 | } | |
723 | ||
fa9ffc74 KP |
724 | if (qos_map) { |
725 | unsigned int i, tmp_dscp = dscp >> 2; | |
726 | ||
727 | for (i = 0; i < qos_map->num_des; i++) { | |
728 | if (tmp_dscp == qos_map->dscp_exception[i].dscp) | |
729 | return qos_map->dscp_exception[i].up; | |
730 | } | |
731 | ||
732 | for (i = 0; i < 8; i++) { | |
733 | if (tmp_dscp >= qos_map->up[i].low && | |
734 | tmp_dscp <= qos_map->up[i].high) | |
735 | return i; | |
736 | } | |
737 | } | |
738 | ||
e31a16d6 ZY |
739 | return dscp >> 5; |
740 | } | |
741 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
742 | |
743 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
744 | { | |
9caf0364 JB |
745 | const struct cfg80211_bss_ies *ies; |
746 | ||
747 | ies = rcu_dereference(bss->ies); | |
748 | if (!ies) | |
517357c6 | 749 | return NULL; |
9caf0364 JB |
750 | |
751 | return cfg80211_find_ie(ie, ies->data, ies->len); | |
517357c6 JB |
752 | } |
753 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
754 | |
755 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
756 | { | |
757 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); | |
758 | struct net_device *dev = wdev->netdev; | |
759 | int i; | |
760 | ||
761 | if (!wdev->connect_keys) | |
762 | return; | |
763 | ||
764 | for (i = 0; i < 6; i++) { | |
765 | if (!wdev->connect_keys->params[i].cipher) | |
766 | continue; | |
e35e4d28 HG |
767 | if (rdev_add_key(rdev, dev, i, false, NULL, |
768 | &wdev->connect_keys->params[i])) { | |
e9c0268f | 769 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
770 | continue; |
771 | } | |
fffd0934 | 772 | if (wdev->connect_keys->def == i) |
e35e4d28 | 773 | if (rdev_set_default_key(rdev, dev, i, true, true)) { |
e9c0268f | 774 | netdev_err(dev, "failed to set defkey %d\n", i); |
1e056665 ZY |
775 | continue; |
776 | } | |
fffd0934 | 777 | if (wdev->connect_keys->defmgmt == i) |
e35e4d28 | 778 | if (rdev_set_default_mgmt_key(rdev, dev, i)) |
e9c0268f | 779 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
fffd0934 JB |
780 | } |
781 | ||
782 | kfree(wdev->connect_keys); | |
783 | wdev->connect_keys = NULL; | |
784 | } | |
3d54d255 | 785 | |
1f6fc43e | 786 | void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
3d54d255 JB |
787 | { |
788 | struct cfg80211_event *ev; | |
789 | unsigned long flags; | |
790 | const u8 *bssid = NULL; | |
791 | ||
792 | spin_lock_irqsave(&wdev->event_lock, flags); | |
793 | while (!list_empty(&wdev->event_list)) { | |
794 | ev = list_first_entry(&wdev->event_list, | |
795 | struct cfg80211_event, list); | |
796 | list_del(&ev->list); | |
797 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
798 | ||
799 | wdev_lock(wdev); | |
800 | switch (ev->type) { | |
801 | case EVENT_CONNECT_RESULT: | |
802 | if (!is_zero_ether_addr(ev->cr.bssid)) | |
803 | bssid = ev->cr.bssid; | |
804 | __cfg80211_connect_result( | |
805 | wdev->netdev, bssid, | |
806 | ev->cr.req_ie, ev->cr.req_ie_len, | |
807 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
808 | ev->cr.status, | |
809 | ev->cr.status == WLAN_STATUS_SUCCESS, | |
810 | NULL); | |
811 | break; | |
812 | case EVENT_ROAMED: | |
adbde344 VT |
813 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
814 | ev->rm.req_ie_len, ev->rm.resp_ie, | |
815 | ev->rm.resp_ie_len); | |
3d54d255 JB |
816 | break; |
817 | case EVENT_DISCONNECTED: | |
818 | __cfg80211_disconnected(wdev->netdev, | |
819 | ev->dc.ie, ev->dc.ie_len, | |
820 | ev->dc.reason, true); | |
821 | break; | |
822 | case EVENT_IBSS_JOINED: | |
fe94f3a4 AQ |
823 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, |
824 | ev->ij.channel); | |
3d54d255 JB |
825 | break; |
826 | } | |
827 | wdev_unlock(wdev); | |
828 | ||
829 | kfree(ev); | |
830 | ||
831 | spin_lock_irqsave(&wdev->event_lock, flags); | |
832 | } | |
833 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
834 | } | |
835 | ||
836 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
837 | { | |
838 | struct wireless_dev *wdev; | |
839 | ||
840 | ASSERT_RTNL(); | |
841 | ASSERT_RDEV_LOCK(rdev); | |
842 | ||
89a54e48 | 843 | list_for_each_entry(wdev, &rdev->wdev_list, list) |
3d54d255 | 844 | cfg80211_process_wdev_events(wdev); |
3d54d255 JB |
845 | } |
846 | ||
847 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
848 | struct net_device *dev, enum nl80211_iftype ntype, | |
849 | u32 *flags, struct vif_params *params) | |
850 | { | |
851 | int err; | |
852 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
853 | ||
854 | ASSERT_RDEV_LOCK(rdev); | |
855 | ||
856 | /* don't support changing VLANs, you just re-create them */ | |
857 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
858 | return -EOPNOTSUPP; | |
859 | ||
98104fde JB |
860 | /* cannot change into P2P device type */ |
861 | if (ntype == NL80211_IFTYPE_P2P_DEVICE) | |
862 | return -EOPNOTSUPP; | |
863 | ||
3d54d255 JB |
864 | if (!rdev->ops->change_virtual_intf || |
865 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
866 | return -EOPNOTSUPP; | |
867 | ||
ad4bb6f8 | 868 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 869 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
870 | (ntype == NL80211_IFTYPE_ADHOC || |
871 | ntype == NL80211_IFTYPE_STATION || | |
872 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
873 | return -EBUSY; |
874 | ||
f8cdddb8 | 875 | if (ntype != otype && netif_running(dev)) { |
7527a782 JB |
876 | err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr, |
877 | ntype); | |
878 | if (err) | |
879 | return err; | |
880 | ||
9bc383de | 881 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 882 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
194ff52d | 883 | wdev_lock(dev->ieee80211_ptr); |
fa9ffc74 | 884 | rdev_set_qos_map(rdev, dev, NULL); |
194ff52d | 885 | wdev_unlock(dev->ieee80211_ptr); |
9bc383de | 886 | |
3d54d255 | 887 | switch (otype) { |
ac800140 MK |
888 | case NL80211_IFTYPE_AP: |
889 | cfg80211_stop_ap(rdev, dev); | |
890 | break; | |
3d54d255 JB |
891 | case NL80211_IFTYPE_ADHOC: |
892 | cfg80211_leave_ibss(rdev, dev, false); | |
893 | break; | |
894 | case NL80211_IFTYPE_STATION: | |
074ac8df | 895 | case NL80211_IFTYPE_P2P_CLIENT: |
83739b03 | 896 | wdev_lock(dev->ieee80211_ptr); |
3d54d255 JB |
897 | cfg80211_disconnect(rdev, dev, |
898 | WLAN_REASON_DEAUTH_LEAVING, true); | |
83739b03 | 899 | wdev_unlock(dev->ieee80211_ptr); |
3d54d255 JB |
900 | break; |
901 | case NL80211_IFTYPE_MESH_POINT: | |
902 | /* mesh should be handled? */ | |
903 | break; | |
904 | default: | |
905 | break; | |
906 | } | |
907 | ||
908 | cfg80211_process_rdev_events(rdev); | |
909 | } | |
910 | ||
e35e4d28 | 911 | err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
3d54d255 JB |
912 | |
913 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
914 | ||
9bc383de JB |
915 | if (!err && params && params->use_4addr != -1) |
916 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
917 | ||
ad4bb6f8 JB |
918 | if (!err) { |
919 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
920 | switch (ntype) { | |
921 | case NL80211_IFTYPE_STATION: | |
922 | if (dev->ieee80211_ptr->use_4addr) | |
923 | break; | |
924 | /* fall through */ | |
074ac8df | 925 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
926 | case NL80211_IFTYPE_ADHOC: |
927 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
928 | break; | |
074ac8df | 929 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
930 | case NL80211_IFTYPE_AP: |
931 | case NL80211_IFTYPE_AP_VLAN: | |
932 | case NL80211_IFTYPE_WDS: | |
933 | case NL80211_IFTYPE_MESH_POINT: | |
934 | /* bridging OK */ | |
935 | break; | |
936 | case NL80211_IFTYPE_MONITOR: | |
937 | /* monitor can't bridge anyway */ | |
938 | break; | |
939 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 940 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
941 | /* not happening */ |
942 | break; | |
98104fde JB |
943 | case NL80211_IFTYPE_P2P_DEVICE: |
944 | WARN_ON(1); | |
945 | break; | |
ad4bb6f8 JB |
946 | } |
947 | } | |
948 | ||
dbbae26a MK |
949 | if (!err && ntype != otype && netif_running(dev)) { |
950 | cfg80211_update_iface_num(rdev, ntype, 1); | |
951 | cfg80211_update_iface_num(rdev, otype, -1); | |
952 | } | |
953 | ||
3d54d255 JB |
954 | return err; |
955 | } | |
254416aa | 956 | |
95ddc1fc VK |
957 | static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
958 | { | |
959 | static const u32 __mcs2bitrate[] = { | |
960 | /* control PHY */ | |
961 | [0] = 275, | |
962 | /* SC PHY */ | |
963 | [1] = 3850, | |
964 | [2] = 7700, | |
965 | [3] = 9625, | |
966 | [4] = 11550, | |
967 | [5] = 12512, /* 1251.25 mbps */ | |
968 | [6] = 15400, | |
969 | [7] = 19250, | |
970 | [8] = 23100, | |
971 | [9] = 25025, | |
972 | [10] = 30800, | |
973 | [11] = 38500, | |
974 | [12] = 46200, | |
975 | /* OFDM PHY */ | |
976 | [13] = 6930, | |
977 | [14] = 8662, /* 866.25 mbps */ | |
978 | [15] = 13860, | |
979 | [16] = 17325, | |
980 | [17] = 20790, | |
981 | [18] = 27720, | |
982 | [19] = 34650, | |
983 | [20] = 41580, | |
984 | [21] = 45045, | |
985 | [22] = 51975, | |
986 | [23] = 62370, | |
987 | [24] = 67568, /* 6756.75 mbps */ | |
988 | /* LP-SC PHY */ | |
989 | [25] = 6260, | |
990 | [26] = 8340, | |
991 | [27] = 11120, | |
992 | [28] = 12510, | |
993 | [29] = 16680, | |
994 | [30] = 22240, | |
995 | [31] = 25030, | |
996 | }; | |
997 | ||
998 | if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) | |
999 | return 0; | |
1000 | ||
1001 | return __mcs2bitrate[rate->mcs]; | |
1002 | } | |
1003 | ||
db9c64cf JB |
1004 | static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
1005 | { | |
1006 | static const u32 base[4][10] = { | |
1007 | { 6500000, | |
1008 | 13000000, | |
1009 | 19500000, | |
1010 | 26000000, | |
1011 | 39000000, | |
1012 | 52000000, | |
1013 | 58500000, | |
1014 | 65000000, | |
1015 | 78000000, | |
1016 | 0, | |
1017 | }, | |
1018 | { 13500000, | |
1019 | 27000000, | |
1020 | 40500000, | |
1021 | 54000000, | |
1022 | 81000000, | |
1023 | 108000000, | |
1024 | 121500000, | |
1025 | 135000000, | |
1026 | 162000000, | |
1027 | 180000000, | |
1028 | }, | |
1029 | { 29300000, | |
1030 | 58500000, | |
1031 | 87800000, | |
1032 | 117000000, | |
1033 | 175500000, | |
1034 | 234000000, | |
1035 | 263300000, | |
1036 | 292500000, | |
1037 | 351000000, | |
1038 | 390000000, | |
1039 | }, | |
1040 | { 58500000, | |
1041 | 117000000, | |
1042 | 175500000, | |
1043 | 234000000, | |
1044 | 351000000, | |
1045 | 468000000, | |
1046 | 526500000, | |
1047 | 585000000, | |
1048 | 702000000, | |
1049 | 780000000, | |
1050 | }, | |
1051 | }; | |
1052 | u32 bitrate; | |
1053 | int idx; | |
1054 | ||
1055 | if (WARN_ON_ONCE(rate->mcs > 9)) | |
1056 | return 0; | |
1057 | ||
1058 | idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH | | |
1059 | RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 : | |
1060 | rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 : | |
1061 | rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 0; | |
1062 | ||
1063 | bitrate = base[idx][rate->mcs]; | |
1064 | bitrate *= rate->nss; | |
1065 | ||
1066 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1067 | bitrate = (bitrate / 9) * 10; | |
1068 | ||
1069 | /* do NOT round down here */ | |
1070 | return (bitrate + 50000) / 100000; | |
1071 | } | |
1072 | ||
8eb41c8d | 1073 | u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
254416aa JL |
1074 | { |
1075 | int modulation, streams, bitrate; | |
1076 | ||
db9c64cf JB |
1077 | if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
1078 | !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) | |
254416aa | 1079 | return rate->legacy; |
95ddc1fc VK |
1080 | if (rate->flags & RATE_INFO_FLAGS_60G) |
1081 | return cfg80211_calculate_bitrate_60g(rate); | |
db9c64cf JB |
1082 | if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
1083 | return cfg80211_calculate_bitrate_vht(rate); | |
254416aa JL |
1084 | |
1085 | /* the formula below does only work for MCS values smaller than 32 */ | |
2615f375 | 1086 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
254416aa JL |
1087 | return 0; |
1088 | ||
1089 | modulation = rate->mcs & 7; | |
1090 | streams = (rate->mcs >> 3) + 1; | |
1091 | ||
1092 | bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? | |
1093 | 13500000 : 6500000; | |
1094 | ||
1095 | if (modulation < 4) | |
1096 | bitrate *= (modulation + 1); | |
1097 | else if (modulation == 4) | |
1098 | bitrate *= (modulation + 2); | |
1099 | else | |
1100 | bitrate *= (modulation + 3); | |
1101 | ||
1102 | bitrate *= streams; | |
1103 | ||
1104 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
1105 | bitrate = (bitrate / 9) * 10; | |
1106 | ||
1107 | /* do NOT round down here */ | |
1108 | return (bitrate + 50000) / 100000; | |
1109 | } | |
8097e149 | 1110 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d | 1111 | |
c216e641 AS |
1112 | int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
1113 | enum ieee80211_p2p_attr_id attr, | |
1114 | u8 *buf, unsigned int bufsize) | |
0ee45355 JB |
1115 | { |
1116 | u8 *out = buf; | |
1117 | u16 attr_remaining = 0; | |
1118 | bool desired_attr = false; | |
1119 | u16 desired_len = 0; | |
1120 | ||
1121 | while (len > 0) { | |
1122 | unsigned int iedatalen; | |
1123 | unsigned int copy; | |
1124 | const u8 *iedata; | |
1125 | ||
1126 | if (len < 2) | |
1127 | return -EILSEQ; | |
1128 | iedatalen = ies[1]; | |
1129 | if (iedatalen + 2 > len) | |
1130 | return -EILSEQ; | |
1131 | ||
1132 | if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) | |
1133 | goto cont; | |
1134 | ||
1135 | if (iedatalen < 4) | |
1136 | goto cont; | |
1137 | ||
1138 | iedata = ies + 2; | |
1139 | ||
1140 | /* check WFA OUI, P2P subtype */ | |
1141 | if (iedata[0] != 0x50 || iedata[1] != 0x6f || | |
1142 | iedata[2] != 0x9a || iedata[3] != 0x09) | |
1143 | goto cont; | |
1144 | ||
1145 | iedatalen -= 4; | |
1146 | iedata += 4; | |
1147 | ||
1148 | /* check attribute continuation into this IE */ | |
1149 | copy = min_t(unsigned int, attr_remaining, iedatalen); | |
1150 | if (copy && desired_attr) { | |
1151 | desired_len += copy; | |
1152 | if (out) { | |
1153 | memcpy(out, iedata, min(bufsize, copy)); | |
1154 | out += min(bufsize, copy); | |
1155 | bufsize -= min(bufsize, copy); | |
1156 | } | |
1157 | ||
1158 | ||
1159 | if (copy == attr_remaining) | |
1160 | return desired_len; | |
1161 | } | |
1162 | ||
1163 | attr_remaining -= copy; | |
1164 | if (attr_remaining) | |
1165 | goto cont; | |
1166 | ||
1167 | iedatalen -= copy; | |
1168 | iedata += copy; | |
1169 | ||
1170 | while (iedatalen > 0) { | |
1171 | u16 attr_len; | |
1172 | ||
1173 | /* P2P attribute ID & size must fit */ | |
1174 | if (iedatalen < 3) | |
1175 | return -EILSEQ; | |
1176 | desired_attr = iedata[0] == attr; | |
1177 | attr_len = get_unaligned_le16(iedata + 1); | |
1178 | iedatalen -= 3; | |
1179 | iedata += 3; | |
1180 | ||
1181 | copy = min_t(unsigned int, attr_len, iedatalen); | |
1182 | ||
1183 | if (desired_attr) { | |
1184 | desired_len += copy; | |
1185 | if (out) { | |
1186 | memcpy(out, iedata, min(bufsize, copy)); | |
1187 | out += min(bufsize, copy); | |
1188 | bufsize -= min(bufsize, copy); | |
1189 | } | |
1190 | ||
1191 | if (copy == attr_len) | |
1192 | return desired_len; | |
1193 | } | |
1194 | ||
1195 | iedata += copy; | |
1196 | iedatalen -= copy; | |
1197 | attr_remaining = attr_len - copy; | |
1198 | } | |
1199 | ||
1200 | cont: | |
1201 | len -= ies[1] + 2; | |
1202 | ies += ies[1] + 2; | |
1203 | } | |
1204 | ||
1205 | if (attr_remaining && desired_attr) | |
1206 | return -EILSEQ; | |
1207 | ||
1208 | return -ENOENT; | |
1209 | } | |
1210 | EXPORT_SYMBOL(cfg80211_get_p2p_attr); | |
1211 | ||
1ce3e82b JB |
1212 | bool ieee80211_operating_class_to_band(u8 operating_class, |
1213 | enum ieee80211_band *band) | |
1214 | { | |
1215 | switch (operating_class) { | |
1216 | case 112: | |
1217 | case 115 ... 127: | |
1218 | *band = IEEE80211_BAND_5GHZ; | |
1219 | return true; | |
1220 | case 81: | |
1221 | case 82: | |
1222 | case 83: | |
1223 | case 84: | |
1224 | *band = IEEE80211_BAND_2GHZ; | |
1225 | return true; | |
55300a13 VK |
1226 | case 180: |
1227 | *band = IEEE80211_BAND_60GHZ; | |
1228 | return true; | |
1ce3e82b JB |
1229 | } |
1230 | ||
1231 | return false; | |
1232 | } | |
1233 | EXPORT_SYMBOL(ieee80211_operating_class_to_band); | |
1234 | ||
56d1893d JB |
1235 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
1236 | u32 beacon_int) | |
1237 | { | |
1238 | struct wireless_dev *wdev; | |
1239 | int res = 0; | |
1240 | ||
1241 | if (!beacon_int) | |
1242 | return -EINVAL; | |
1243 | ||
89a54e48 | 1244 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
56d1893d JB |
1245 | if (!wdev->beacon_interval) |
1246 | continue; | |
1247 | if (wdev->beacon_interval != beacon_int) { | |
1248 | res = -EINVAL; | |
1249 | break; | |
1250 | } | |
1251 | } | |
1252 | ||
56d1893d JB |
1253 | return res; |
1254 | } | |
7527a782 | 1255 | |
d4e50c59 MK |
1256 | int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
1257 | struct wireless_dev *wdev, | |
1258 | enum nl80211_iftype iftype, | |
1259 | struct ieee80211_channel *chan, | |
11c4a075 SW |
1260 | enum cfg80211_chan_mode chanmode, |
1261 | u8 radar_detect) | |
7527a782 JB |
1262 | { |
1263 | struct wireless_dev *wdev_iter; | |
463454b5 | 1264 | u32 used_iftypes = BIT(iftype); |
7527a782 | 1265 | int num[NUM_NL80211_IFTYPES]; |
d4e50c59 MK |
1266 | struct ieee80211_channel |
1267 | *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; | |
1268 | struct ieee80211_channel *ch; | |
1269 | enum cfg80211_chan_mode chmode; | |
1270 | int num_different_channels = 0; | |
7527a782 | 1271 | int total = 1; |
5336fa88 | 1272 | bool radar_required = false; |
7527a782 JB |
1273 | int i, j; |
1274 | ||
1275 | ASSERT_RTNL(); | |
1276 | ||
11c4a075 SW |
1277 | if (WARN_ON(hweight32(radar_detect) > 1)) |
1278 | return -EINVAL; | |
1279 | ||
1280 | switch (iftype) { | |
1281 | case NL80211_IFTYPE_ADHOC: | |
1282 | case NL80211_IFTYPE_AP: | |
1283 | case NL80211_IFTYPE_AP_VLAN: | |
1284 | case NL80211_IFTYPE_MESH_POINT: | |
1285 | case NL80211_IFTYPE_P2P_GO: | |
1286 | case NL80211_IFTYPE_WDS: | |
5336fa88 SW |
1287 | /* if the interface could potentially choose a DFS channel, |
1288 | * then mark DFS as required. | |
1289 | */ | |
1290 | if (!chan) { | |
1291 | if (chanmode != CHAN_MODE_UNDEFINED && radar_detect) | |
1292 | radar_required = true; | |
1293 | break; | |
1294 | } | |
1295 | radar_required = !!(chan->flags & IEEE80211_CHAN_RADAR); | |
11c4a075 SW |
1296 | break; |
1297 | case NL80211_IFTYPE_P2P_CLIENT: | |
1298 | case NL80211_IFTYPE_STATION: | |
bba87ffe | 1299 | case NL80211_IFTYPE_P2P_DEVICE: |
11c4a075 | 1300 | case NL80211_IFTYPE_MONITOR: |
11c4a075 | 1301 | break; |
11c4a075 SW |
1302 | case NUM_NL80211_IFTYPES: |
1303 | case NL80211_IFTYPE_UNSPECIFIED: | |
1304 | default: | |
1305 | return -EINVAL; | |
1306 | } | |
1307 | ||
1308 | if (radar_required && !radar_detect) | |
1309 | return -EINVAL; | |
1310 | ||
7527a782 | 1311 | /* Always allow software iftypes */ |
11c4a075 SW |
1312 | if (rdev->wiphy.software_iftypes & BIT(iftype)) { |
1313 | if (radar_detect) | |
1314 | return -EINVAL; | |
7527a782 | 1315 | return 0; |
11c4a075 | 1316 | } |
7527a782 | 1317 | |
7527a782 | 1318 | memset(num, 0, sizeof(num)); |
d4e50c59 | 1319 | memset(used_channels, 0, sizeof(used_channels)); |
7527a782 JB |
1320 | |
1321 | num[iftype] = 1; | |
1322 | ||
d4e50c59 MK |
1323 | switch (chanmode) { |
1324 | case CHAN_MODE_UNDEFINED: | |
1325 | break; | |
1326 | case CHAN_MODE_SHARED: | |
1327 | WARN_ON(!chan); | |
1328 | used_channels[0] = chan; | |
1329 | num_different_channels++; | |
1330 | break; | |
1331 | case CHAN_MODE_EXCLUSIVE: | |
1332 | num_different_channels++; | |
1333 | break; | |
1334 | } | |
1335 | ||
89a54e48 | 1336 | list_for_each_entry(wdev_iter, &rdev->wdev_list, list) { |
7527a782 JB |
1337 | if (wdev_iter == wdev) |
1338 | continue; | |
6e3ab554 | 1339 | if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) { |
98104fde JB |
1340 | if (!wdev_iter->p2p_started) |
1341 | continue; | |
6e3ab554 JB |
1342 | } else if (wdev_iter->netdev) { |
1343 | if (!netif_running(wdev_iter->netdev)) | |
1344 | continue; | |
98104fde JB |
1345 | } else { |
1346 | WARN_ON(1); | |
1347 | } | |
7527a782 JB |
1348 | |
1349 | if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) | |
1350 | continue; | |
1351 | ||
8e95ea49 JB |
1352 | /* |
1353 | * We may be holding the "wdev" mutex, but now need to lock | |
1354 | * wdev_iter. This is OK because once we get here wdev_iter | |
1355 | * is not wdev (tested above), but we need to use the nested | |
1356 | * locking for lockdep. | |
1357 | */ | |
1358 | mutex_lock_nested(&wdev_iter->mtx, 1); | |
1359 | __acquire(wdev_iter->mtx); | |
9e0e2961 | 1360 | cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect); |
8e95ea49 | 1361 | wdev_unlock(wdev_iter); |
d4e50c59 MK |
1362 | |
1363 | switch (chmode) { | |
1364 | case CHAN_MODE_UNDEFINED: | |
1365 | break; | |
1366 | case CHAN_MODE_SHARED: | |
1367 | for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) | |
1368 | if (!used_channels[i] || used_channels[i] == ch) | |
1369 | break; | |
1370 | ||
e4e32459 | 1371 | if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
d4e50c59 | 1372 | return -EBUSY; |
d4e50c59 MK |
1373 | |
1374 | if (used_channels[i] == NULL) { | |
1375 | used_channels[i] = ch; | |
1376 | num_different_channels++; | |
1377 | } | |
1378 | break; | |
1379 | case CHAN_MODE_EXCLUSIVE: | |
1380 | num_different_channels++; | |
1381 | break; | |
1382 | } | |
1383 | ||
7527a782 JB |
1384 | num[wdev_iter->iftype]++; |
1385 | total++; | |
463454b5 | 1386 | used_iftypes |= BIT(wdev_iter->iftype); |
7527a782 | 1387 | } |
7527a782 | 1388 | |
11c4a075 | 1389 | if (total == 1 && !radar_detect) |
8e8b41f9 JB |
1390 | return 0; |
1391 | ||
7527a782 JB |
1392 | for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) { |
1393 | const struct ieee80211_iface_combination *c; | |
1394 | struct ieee80211_iface_limit *limits; | |
463454b5 | 1395 | u32 all_iftypes = 0; |
7527a782 JB |
1396 | |
1397 | c = &rdev->wiphy.iface_combinations[i]; | |
1398 | ||
d4e50c59 MK |
1399 | if (total > c->max_interfaces) |
1400 | continue; | |
1401 | if (num_different_channels > c->num_different_channels) | |
1402 | continue; | |
1403 | ||
7527a782 JB |
1404 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
1405 | GFP_KERNEL); | |
1406 | if (!limits) | |
1407 | return -ENOMEM; | |
7527a782 JB |
1408 | |
1409 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1410 | if (rdev->wiphy.software_iftypes & BIT(iftype)) | |
1411 | continue; | |
1412 | for (j = 0; j < c->n_limits; j++) { | |
463454b5 | 1413 | all_iftypes |= limits[j].types; |
e55a4046 | 1414 | if (!(limits[j].types & BIT(iftype))) |
7527a782 JB |
1415 | continue; |
1416 | if (limits[j].max < num[iftype]) | |
1417 | goto cont; | |
1418 | limits[j].max -= num[iftype]; | |
1419 | } | |
1420 | } | |
463454b5 | 1421 | |
11c4a075 SW |
1422 | if (radar_detect && !(c->radar_detect_widths & radar_detect)) |
1423 | goto cont; | |
1424 | ||
463454b5 JB |
1425 | /* |
1426 | * Finally check that all iftypes that we're currently | |
1427 | * using are actually part of this combination. If they | |
1428 | * aren't then we can't use this combination and have | |
1429 | * to continue to the next. | |
1430 | */ | |
1431 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1432 | goto cont; | |
1433 | ||
1434 | /* | |
1435 | * This combination covered all interface types and | |
1436 | * supported the requested numbers, so we're good. | |
1437 | */ | |
7527a782 JB |
1438 | kfree(limits); |
1439 | return 0; | |
1440 | cont: | |
1441 | kfree(limits); | |
1442 | } | |
1443 | ||
1444 | return -EBUSY; | |
1445 | } | |
34850ab2 JB |
1446 | |
1447 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, | |
1448 | const u8 *rates, unsigned int n_rates, | |
1449 | u32 *mask) | |
1450 | { | |
1451 | int i, j; | |
1452 | ||
a401d2bb JB |
1453 | if (!sband) |
1454 | return -EINVAL; | |
1455 | ||
34850ab2 JB |
1456 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1457 | return -EINVAL; | |
1458 | ||
1459 | *mask = 0; | |
1460 | ||
1461 | for (i = 0; i < n_rates; i++) { | |
1462 | int rate = (rates[i] & 0x7f) * 5; | |
1463 | bool found = false; | |
1464 | ||
1465 | for (j = 0; j < sband->n_bitrates; j++) { | |
1466 | if (sband->bitrates[j].bitrate == rate) { | |
1467 | found = true; | |
1468 | *mask |= BIT(j); | |
1469 | break; | |
1470 | } | |
1471 | } | |
1472 | if (!found) | |
1473 | return -EINVAL; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * mask must have at least one bit set here since we | |
1478 | * didn't accept a 0-length rates array nor allowed | |
1479 | * entries in the array that didn't exist | |
1480 | */ | |
1481 | ||
1482 | return 0; | |
1483 | } | |
11a2a357 | 1484 | |
bdfbec2d IP |
1485 | unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) |
1486 | { | |
1487 | enum ieee80211_band band; | |
1488 | unsigned int n_channels = 0; | |
1489 | ||
1490 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
1491 | if (wiphy->bands[band]) | |
1492 | n_channels += wiphy->bands[band]->n_channels; | |
1493 | ||
1494 | return n_channels; | |
1495 | } | |
1496 | EXPORT_SYMBOL(ieee80211_get_num_supported_channels); | |
1497 | ||
11a2a357 JB |
1498 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
1499 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1500 | const unsigned char rfc1042_header[] __aligned(2) = | |
1501 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1502 | EXPORT_SYMBOL(rfc1042_header); | |
1503 | ||
1504 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1505 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1506 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1507 | EXPORT_SYMBOL(bridge_tunnel_header); |