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Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Wireless utility functions | |
3 | * | |
d3236553 | 4 | * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
8318d78a | 5 | */ |
bc3b2d7f | 6 | #include <linux/export.h> |
d3236553 | 7 | #include <linux/bitops.h> |
e31a16d6 | 8 | #include <linux/etherdevice.h> |
5a0e3ad6 | 9 | #include <linux/slab.h> |
d3236553 | 10 | #include <net/cfg80211.h> |
e31a16d6 | 11 | #include <net/ip.h> |
b156579b | 12 | #include <net/dsfield.h> |
8318d78a JB |
13 | #include "core.h" |
14 | ||
bd815252 JB |
15 | struct ieee80211_rate * |
16 | ieee80211_get_response_rate(struct ieee80211_supported_band *sband, | |
881d948c | 17 | u32 basic_rates, int bitrate) |
bd815252 JB |
18 | { |
19 | struct ieee80211_rate *result = &sband->bitrates[0]; | |
20 | int i; | |
21 | ||
22 | for (i = 0; i < sband->n_bitrates; i++) { | |
23 | if (!(basic_rates & BIT(i))) | |
24 | continue; | |
25 | if (sband->bitrates[i].bitrate > bitrate) | |
26 | continue; | |
27 | result = &sband->bitrates[i]; | |
28 | } | |
29 | ||
30 | return result; | |
31 | } | |
32 | EXPORT_SYMBOL(ieee80211_get_response_rate); | |
33 | ||
59eb21a6 | 34 | int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
8318d78a | 35 | { |
59eb21a6 BR |
36 | /* see 802.11 17.3.8.3.2 and Annex J |
37 | * there are overlapping channel numbers in 5GHz and 2GHz bands */ | |
3a0c52a6 VK |
38 | if (chan <= 0) |
39 | return 0; /* not supported */ | |
40 | switch (band) { | |
41 | case IEEE80211_BAND_2GHZ: | |
59eb21a6 BR |
42 | if (chan == 14) |
43 | return 2484; | |
44 | else if (chan < 14) | |
45 | return 2407 + chan * 5; | |
3a0c52a6 VK |
46 | break; |
47 | case IEEE80211_BAND_5GHZ: | |
48 | if (chan >= 182 && chan <= 196) | |
49 | return 4000 + chan * 5; | |
59eb21a6 | 50 | else |
3a0c52a6 VK |
51 | return 5000 + chan * 5; |
52 | break; | |
53 | case IEEE80211_BAND_60GHZ: | |
54 | if (chan < 5) | |
55 | return 56160 + chan * 2160; | |
56 | break; | |
57 | default: | |
58 | ; | |
59eb21a6 | 59 | } |
3a0c52a6 | 60 | return 0; /* not supported */ |
8318d78a JB |
61 | } |
62 | EXPORT_SYMBOL(ieee80211_channel_to_frequency); | |
63 | ||
64 | int ieee80211_frequency_to_channel(int freq) | |
65 | { | |
59eb21a6 | 66 | /* see 802.11 17.3.8.3.2 and Annex J */ |
8318d78a JB |
67 | if (freq == 2484) |
68 | return 14; | |
59eb21a6 | 69 | else if (freq < 2484) |
8318d78a | 70 | return (freq - 2407) / 5; |
59eb21a6 BR |
71 | else if (freq >= 4910 && freq <= 4980) |
72 | return (freq - 4000) / 5; | |
3a0c52a6 | 73 | else if (freq <= 45000) /* DMG band lower limit */ |
59eb21a6 | 74 | return (freq - 5000) / 5; |
3a0c52a6 VK |
75 | else if (freq >= 58320 && freq <= 64800) |
76 | return (freq - 56160) / 2160; | |
77 | else | |
78 | return 0; | |
8318d78a JB |
79 | } |
80 | EXPORT_SYMBOL(ieee80211_frequency_to_channel); | |
81 | ||
6c507cd0 JB |
82 | struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
83 | int freq) | |
906c730a JB |
84 | { |
85 | enum ieee80211_band band; | |
86 | struct ieee80211_supported_band *sband; | |
87 | int i; | |
88 | ||
89 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
90 | sband = wiphy->bands[band]; | |
91 | ||
92 | if (!sband) | |
93 | continue; | |
94 | ||
95 | for (i = 0; i < sband->n_channels; i++) { | |
96 | if (sband->channels[i].center_freq == freq) | |
97 | return &sband->channels[i]; | |
98 | } | |
99 | } | |
100 | ||
101 | return NULL; | |
102 | } | |
6c507cd0 | 103 | EXPORT_SYMBOL(__ieee80211_get_channel); |
906c730a | 104 | |
8318d78a JB |
105 | static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
106 | enum ieee80211_band band) | |
107 | { | |
108 | int i, want; | |
109 | ||
110 | switch (band) { | |
111 | case IEEE80211_BAND_5GHZ: | |
112 | want = 3; | |
113 | for (i = 0; i < sband->n_bitrates; i++) { | |
114 | if (sband->bitrates[i].bitrate == 60 || | |
115 | sband->bitrates[i].bitrate == 120 || | |
116 | sband->bitrates[i].bitrate == 240) { | |
117 | sband->bitrates[i].flags |= | |
118 | IEEE80211_RATE_MANDATORY_A; | |
119 | want--; | |
120 | } | |
121 | } | |
122 | WARN_ON(want); | |
123 | break; | |
124 | case IEEE80211_BAND_2GHZ: | |
125 | want = 7; | |
126 | for (i = 0; i < sband->n_bitrates; i++) { | |
127 | if (sband->bitrates[i].bitrate == 10) { | |
128 | sband->bitrates[i].flags |= | |
129 | IEEE80211_RATE_MANDATORY_B | | |
130 | IEEE80211_RATE_MANDATORY_G; | |
131 | want--; | |
132 | } | |
133 | ||
134 | if (sband->bitrates[i].bitrate == 20 || | |
135 | sband->bitrates[i].bitrate == 55 || | |
136 | sband->bitrates[i].bitrate == 110 || | |
137 | sband->bitrates[i].bitrate == 60 || | |
138 | sband->bitrates[i].bitrate == 120 || | |
139 | sband->bitrates[i].bitrate == 240) { | |
140 | sband->bitrates[i].flags |= | |
141 | IEEE80211_RATE_MANDATORY_G; | |
142 | want--; | |
143 | } | |
144 | ||
aac09fbf JB |
145 | if (sband->bitrates[i].bitrate != 10 && |
146 | sband->bitrates[i].bitrate != 20 && | |
147 | sband->bitrates[i].bitrate != 55 && | |
148 | sband->bitrates[i].bitrate != 110) | |
8318d78a JB |
149 | sband->bitrates[i].flags |= |
150 | IEEE80211_RATE_ERP_G; | |
151 | } | |
406f2388 | 152 | WARN_ON(want != 0 && want != 3 && want != 6); |
8318d78a | 153 | break; |
3a0c52a6 VK |
154 | case IEEE80211_BAND_60GHZ: |
155 | /* check for mandatory HT MCS 1..4 */ | |
156 | WARN_ON(!sband->ht_cap.ht_supported); | |
157 | WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); | |
158 | break; | |
8318d78a JB |
159 | case IEEE80211_NUM_BANDS: |
160 | WARN_ON(1); | |
161 | break; | |
162 | } | |
163 | } | |
164 | ||
165 | void ieee80211_set_bitrate_flags(struct wiphy *wiphy) | |
166 | { | |
167 | enum ieee80211_band band; | |
168 | ||
169 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
170 | if (wiphy->bands[band]) | |
171 | set_mandatory_flags_band(wiphy->bands[band], band); | |
172 | } | |
08645126 | 173 | |
38ba3c57 JM |
174 | bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
175 | { | |
176 | int i; | |
177 | for (i = 0; i < wiphy->n_cipher_suites; i++) | |
178 | if (cipher == wiphy->cipher_suites[i]) | |
179 | return true; | |
180 | return false; | |
181 | } | |
182 | ||
fffd0934 JB |
183 | int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
184 | struct key_params *params, int key_idx, | |
e31b8213 | 185 | bool pairwise, const u8 *mac_addr) |
08645126 JB |
186 | { |
187 | if (key_idx > 5) | |
188 | return -EINVAL; | |
189 | ||
e31b8213 JB |
190 | if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
191 | return -EINVAL; | |
192 | ||
193 | if (pairwise && !mac_addr) | |
194 | return -EINVAL; | |
195 | ||
08645126 JB |
196 | /* |
197 | * Disallow pairwise keys with non-zero index unless it's WEP | |
45cbad6a JO |
198 | * or a vendor specific cipher (because current deployments use |
199 | * pairwise WEP keys with non-zero indices and for vendor specific | |
200 | * ciphers this should be validated in the driver or hardware level | |
201 | * - but 802.11i clearly specifies to use zero) | |
08645126 | 202 | */ |
e31b8213 | 203 | if (pairwise && key_idx && |
45cbad6a JO |
204 | ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
205 | (params->cipher == WLAN_CIPHER_SUITE_CCMP) || | |
206 | (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) | |
08645126 JB |
207 | return -EINVAL; |
208 | ||
08645126 JB |
209 | switch (params->cipher) { |
210 | case WLAN_CIPHER_SUITE_WEP40: | |
8fc0fee0 | 211 | if (params->key_len != WLAN_KEY_LEN_WEP40) |
08645126 JB |
212 | return -EINVAL; |
213 | break; | |
214 | case WLAN_CIPHER_SUITE_TKIP: | |
8fc0fee0 | 215 | if (params->key_len != WLAN_KEY_LEN_TKIP) |
08645126 JB |
216 | return -EINVAL; |
217 | break; | |
218 | case WLAN_CIPHER_SUITE_CCMP: | |
8fc0fee0 | 219 | if (params->key_len != WLAN_KEY_LEN_CCMP) |
08645126 JB |
220 | return -EINVAL; |
221 | break; | |
222 | case WLAN_CIPHER_SUITE_WEP104: | |
8fc0fee0 | 223 | if (params->key_len != WLAN_KEY_LEN_WEP104) |
08645126 JB |
224 | return -EINVAL; |
225 | break; | |
226 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
8fc0fee0 | 227 | if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
08645126 JB |
228 | return -EINVAL; |
229 | break; | |
230 | default: | |
7d64b7cc JB |
231 | /* |
232 | * We don't know anything about this algorithm, | |
233 | * allow using it -- but the driver must check | |
234 | * all parameters! We still check below whether | |
235 | * or not the driver supports this algorithm, | |
236 | * of course. | |
237 | */ | |
238 | break; | |
08645126 JB |
239 | } |
240 | ||
9f26a952 JM |
241 | if (params->seq) { |
242 | switch (params->cipher) { | |
243 | case WLAN_CIPHER_SUITE_WEP40: | |
244 | case WLAN_CIPHER_SUITE_WEP104: | |
245 | /* These ciphers do not use key sequence */ | |
246 | return -EINVAL; | |
247 | case WLAN_CIPHER_SUITE_TKIP: | |
248 | case WLAN_CIPHER_SUITE_CCMP: | |
249 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
250 | if (params->seq_len != 6) | |
251 | return -EINVAL; | |
252 | break; | |
253 | } | |
254 | } | |
255 | ||
38ba3c57 | 256 | if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
fffd0934 JB |
257 | return -EINVAL; |
258 | ||
08645126 JB |
259 | return 0; |
260 | } | |
e31a16d6 | 261 | |
633adf1a | 262 | unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
e31a16d6 ZY |
263 | { |
264 | unsigned int hdrlen = 24; | |
265 | ||
266 | if (ieee80211_is_data(fc)) { | |
267 | if (ieee80211_has_a4(fc)) | |
268 | hdrlen = 30; | |
d0dd2de0 | 269 | if (ieee80211_is_data_qos(fc)) { |
e31a16d6 | 270 | hdrlen += IEEE80211_QOS_CTL_LEN; |
d0dd2de0 AT |
271 | if (ieee80211_has_order(fc)) |
272 | hdrlen += IEEE80211_HT_CTL_LEN; | |
273 | } | |
e31a16d6 ZY |
274 | goto out; |
275 | } | |
276 | ||
277 | if (ieee80211_is_ctl(fc)) { | |
278 | /* | |
279 | * ACK and CTS are 10 bytes, all others 16. To see how | |
280 | * to get this condition consider | |
281 | * subtype mask: 0b0000000011110000 (0x00F0) | |
282 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
283 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
284 | * bits that matter: ^^^ (0x00E0) | |
285 | * value of those: 0b0000000011000000 (0x00C0) | |
286 | */ | |
287 | if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) | |
288 | hdrlen = 10; | |
289 | else | |
290 | hdrlen = 16; | |
291 | } | |
292 | out: | |
293 | return hdrlen; | |
294 | } | |
295 | EXPORT_SYMBOL(ieee80211_hdrlen); | |
296 | ||
297 | unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
298 | { | |
299 | const struct ieee80211_hdr *hdr = | |
300 | (const struct ieee80211_hdr *)skb->data; | |
301 | unsigned int hdrlen; | |
302 | ||
303 | if (unlikely(skb->len < 10)) | |
304 | return 0; | |
305 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
306 | if (unlikely(hdrlen > skb->len)) | |
307 | return 0; | |
308 | return hdrlen; | |
309 | } | |
310 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
311 | ||
60fd2b67 | 312 | static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
e31a16d6 ZY |
313 | { |
314 | int ae = meshhdr->flags & MESH_FLAGS_AE; | |
315 | /* 7.1.3.5a.2 */ | |
316 | switch (ae) { | |
317 | case 0: | |
318 | return 6; | |
3c5772a5 | 319 | case MESH_FLAGS_AE_A4: |
e31a16d6 | 320 | return 12; |
3c5772a5 | 321 | case MESH_FLAGS_AE_A5_A6: |
e31a16d6 | 322 | return 18; |
3c5772a5 | 323 | case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6): |
e31a16d6 ZY |
324 | return 24; |
325 | default: | |
326 | return 6; | |
327 | } | |
328 | } | |
329 | ||
eaf85ca7 | 330 | int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
331 | enum nl80211_iftype iftype) |
332 | { | |
333 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
334 | u16 hdrlen, ethertype; | |
335 | u8 *payload; | |
336 | u8 dst[ETH_ALEN]; | |
337 | u8 src[ETH_ALEN] __aligned(2); | |
338 | ||
339 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) | |
340 | return -1; | |
341 | ||
342 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
343 | ||
344 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
345 | * header | |
346 | * IEEE 802.11 address fields: | |
347 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
348 | * 0 0 DA SA BSSID n/a | |
349 | * 0 1 DA BSSID SA n/a | |
350 | * 1 0 BSSID SA DA n/a | |
351 | * 1 1 RA TA DA SA | |
352 | */ | |
353 | memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); | |
354 | memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); | |
355 | ||
356 | switch (hdr->frame_control & | |
357 | cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
358 | case cpu_to_le16(IEEE80211_FCTL_TODS): | |
359 | if (unlikely(iftype != NL80211_IFTYPE_AP && | |
074ac8df JB |
360 | iftype != NL80211_IFTYPE_AP_VLAN && |
361 | iftype != NL80211_IFTYPE_P2P_GO)) | |
e31a16d6 ZY |
362 | return -1; |
363 | break; | |
364 | case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
365 | if (unlikely(iftype != NL80211_IFTYPE_WDS && | |
f14543ee FF |
366 | iftype != NL80211_IFTYPE_MESH_POINT && |
367 | iftype != NL80211_IFTYPE_AP_VLAN && | |
368 | iftype != NL80211_IFTYPE_STATION)) | |
e31a16d6 ZY |
369 | return -1; |
370 | if (iftype == NL80211_IFTYPE_MESH_POINT) { | |
371 | struct ieee80211s_hdr *meshdr = | |
372 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
373 | /* make sure meshdr->flags is on the linear part */ |
374 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
375 | return -1; | |
e31a16d6 | 376 | if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
e3cf8b3f ZY |
377 | skb_copy_bits(skb, hdrlen + |
378 | offsetof(struct ieee80211s_hdr, eaddr1), | |
379 | dst, ETH_ALEN); | |
380 | skb_copy_bits(skb, hdrlen + | |
381 | offsetof(struct ieee80211s_hdr, eaddr2), | |
382 | src, ETH_ALEN); | |
e31a16d6 | 383 | } |
e3cf8b3f | 384 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
e31a16d6 ZY |
385 | } |
386 | break; | |
387 | case cpu_to_le16(IEEE80211_FCTL_FROMDS): | |
3c5772a5 | 388 | if ((iftype != NL80211_IFTYPE_STATION && |
074ac8df JB |
389 | iftype != NL80211_IFTYPE_P2P_CLIENT && |
390 | iftype != NL80211_IFTYPE_MESH_POINT) || | |
e31a16d6 | 391 | (is_multicast_ether_addr(dst) && |
4c764729 | 392 | ether_addr_equal(src, addr))) |
e31a16d6 | 393 | return -1; |
3c5772a5 JC |
394 | if (iftype == NL80211_IFTYPE_MESH_POINT) { |
395 | struct ieee80211s_hdr *meshdr = | |
396 | (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
e3cf8b3f ZY |
397 | /* make sure meshdr->flags is on the linear part */ |
398 | if (!pskb_may_pull(skb, hdrlen + 1)) | |
399 | return -1; | |
3c5772a5 | 400 | if (meshdr->flags & MESH_FLAGS_AE_A4) |
e3cf8b3f ZY |
401 | skb_copy_bits(skb, hdrlen + |
402 | offsetof(struct ieee80211s_hdr, eaddr1), | |
403 | src, ETH_ALEN); | |
404 | hdrlen += ieee80211_get_mesh_hdrlen(meshdr); | |
3c5772a5 | 405 | } |
e31a16d6 ZY |
406 | break; |
407 | case cpu_to_le16(0): | |
941c93cd AN |
408 | if (iftype != NL80211_IFTYPE_ADHOC && |
409 | iftype != NL80211_IFTYPE_STATION) | |
410 | return -1; | |
e31a16d6 ZY |
411 | break; |
412 | } | |
413 | ||
e3cf8b3f | 414 | if (!pskb_may_pull(skb, hdrlen + 8)) |
e31a16d6 ZY |
415 | return -1; |
416 | ||
417 | payload = skb->data + hdrlen; | |
418 | ethertype = (payload[6] << 8) | payload[7]; | |
419 | ||
4c764729 | 420 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
e31a16d6 | 421 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
4c764729 | 422 | ether_addr_equal(payload, bridge_tunnel_header))) { |
e31a16d6 ZY |
423 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
424 | * replace EtherType */ | |
425 | skb_pull(skb, hdrlen + 6); | |
426 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
427 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
428 | } else { | |
429 | struct ethhdr *ehdr; | |
430 | __be16 len; | |
431 | ||
432 | skb_pull(skb, hdrlen); | |
433 | len = htons(skb->len); | |
434 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
435 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
436 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
437 | ehdr->h_proto = len; | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | EXPORT_SYMBOL(ieee80211_data_to_8023); | |
442 | ||
eaf85ca7 | 443 | int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
e31a16d6 ZY |
444 | enum nl80211_iftype iftype, u8 *bssid, bool qos) |
445 | { | |
446 | struct ieee80211_hdr hdr; | |
447 | u16 hdrlen, ethertype; | |
448 | __le16 fc; | |
449 | const u8 *encaps_data; | |
450 | int encaps_len, skip_header_bytes; | |
451 | int nh_pos, h_pos; | |
452 | int head_need; | |
453 | ||
454 | if (unlikely(skb->len < ETH_HLEN)) | |
455 | return -EINVAL; | |
456 | ||
457 | nh_pos = skb_network_header(skb) - skb->data; | |
458 | h_pos = skb_transport_header(skb) - skb->data; | |
459 | ||
460 | /* convert Ethernet header to proper 802.11 header (based on | |
461 | * operation mode) */ | |
462 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
463 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
464 | ||
465 | switch (iftype) { | |
466 | case NL80211_IFTYPE_AP: | |
467 | case NL80211_IFTYPE_AP_VLAN: | |
074ac8df | 468 | case NL80211_IFTYPE_P2P_GO: |
e31a16d6 ZY |
469 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
470 | /* DA BSSID SA */ | |
471 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
472 | memcpy(hdr.addr2, addr, ETH_ALEN); | |
473 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
474 | hdrlen = 24; | |
475 | break; | |
476 | case NL80211_IFTYPE_STATION: | |
074ac8df | 477 | case NL80211_IFTYPE_P2P_CLIENT: |
e31a16d6 ZY |
478 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
479 | /* BSSID SA DA */ | |
480 | memcpy(hdr.addr1, bssid, ETH_ALEN); | |
481 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
482 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
483 | hdrlen = 24; | |
484 | break; | |
485 | case NL80211_IFTYPE_ADHOC: | |
486 | /* DA SA BSSID */ | |
487 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
488 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
489 | memcpy(hdr.addr3, bssid, ETH_ALEN); | |
490 | hdrlen = 24; | |
491 | break; | |
492 | default: | |
493 | return -EOPNOTSUPP; | |
494 | } | |
495 | ||
496 | if (qos) { | |
497 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
498 | hdrlen += 2; | |
499 | } | |
500 | ||
501 | hdr.frame_control = fc; | |
502 | hdr.duration_id = 0; | |
503 | hdr.seq_ctrl = 0; | |
504 | ||
505 | skip_header_bytes = ETH_HLEN; | |
506 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
507 | encaps_data = bridge_tunnel_header; | |
508 | encaps_len = sizeof(bridge_tunnel_header); | |
509 | skip_header_bytes -= 2; | |
510 | } else if (ethertype > 0x600) { | |
511 | encaps_data = rfc1042_header; | |
512 | encaps_len = sizeof(rfc1042_header); | |
513 | skip_header_bytes -= 2; | |
514 | } else { | |
515 | encaps_data = NULL; | |
516 | encaps_len = 0; | |
517 | } | |
518 | ||
519 | skb_pull(skb, skip_header_bytes); | |
520 | nh_pos -= skip_header_bytes; | |
521 | h_pos -= skip_header_bytes; | |
522 | ||
523 | head_need = hdrlen + encaps_len - skb_headroom(skb); | |
524 | ||
525 | if (head_need > 0 || skb_cloned(skb)) { | |
526 | head_need = max(head_need, 0); | |
527 | if (head_need) | |
528 | skb_orphan(skb); | |
529 | ||
24616152 | 530 | if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
e31a16d6 | 531 | return -ENOMEM; |
24616152 | 532 | |
e31a16d6 ZY |
533 | skb->truesize += head_need; |
534 | } | |
535 | ||
536 | if (encaps_data) { | |
537 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
538 | nh_pos += encaps_len; | |
539 | h_pos += encaps_len; | |
540 | } | |
541 | ||
542 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
543 | ||
544 | nh_pos += hdrlen; | |
545 | h_pos += hdrlen; | |
546 | ||
547 | /* Update skb pointers to various headers since this modified frame | |
548 | * is going to go through Linux networking code that may potentially | |
549 | * need things like pointer to IP header. */ | |
550 | skb_set_mac_header(skb, 0); | |
551 | skb_set_network_header(skb, nh_pos); | |
552 | skb_set_transport_header(skb, h_pos); | |
553 | ||
554 | return 0; | |
555 | } | |
556 | EXPORT_SYMBOL(ieee80211_data_from_8023); | |
557 | ||
eaf85ca7 ZY |
558 | |
559 | void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, | |
560 | const u8 *addr, enum nl80211_iftype iftype, | |
8b3becad YAP |
561 | const unsigned int extra_headroom, |
562 | bool has_80211_header) | |
eaf85ca7 ZY |
563 | { |
564 | struct sk_buff *frame = NULL; | |
565 | u16 ethertype; | |
566 | u8 *payload; | |
567 | const struct ethhdr *eth; | |
568 | int remaining, err; | |
569 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
570 | ||
8b3becad YAP |
571 | if (has_80211_header) { |
572 | err = ieee80211_data_to_8023(skb, addr, iftype); | |
573 | if (err) | |
574 | goto out; | |
eaf85ca7 | 575 | |
8b3becad YAP |
576 | /* skip the wrapping header */ |
577 | eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); | |
578 | if (!eth) | |
579 | goto out; | |
580 | } else { | |
581 | eth = (struct ethhdr *) skb->data; | |
582 | } | |
eaf85ca7 ZY |
583 | |
584 | while (skb != frame) { | |
585 | u8 padding; | |
586 | __be16 len = eth->h_proto; | |
587 | unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); | |
588 | ||
589 | remaining = skb->len; | |
590 | memcpy(dst, eth->h_dest, ETH_ALEN); | |
591 | memcpy(src, eth->h_source, ETH_ALEN); | |
592 | ||
593 | padding = (4 - subframe_len) & 0x3; | |
594 | /* the last MSDU has no padding */ | |
595 | if (subframe_len > remaining) | |
596 | goto purge; | |
597 | ||
598 | skb_pull(skb, sizeof(struct ethhdr)); | |
599 | /* reuse skb for the last subframe */ | |
600 | if (remaining <= subframe_len + padding) | |
601 | frame = skb; | |
602 | else { | |
603 | unsigned int hlen = ALIGN(extra_headroom, 4); | |
604 | /* | |
605 | * Allocate and reserve two bytes more for payload | |
606 | * alignment since sizeof(struct ethhdr) is 14. | |
607 | */ | |
608 | frame = dev_alloc_skb(hlen + subframe_len + 2); | |
609 | if (!frame) | |
610 | goto purge; | |
611 | ||
612 | skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); | |
613 | memcpy(skb_put(frame, ntohs(len)), skb->data, | |
614 | ntohs(len)); | |
615 | ||
616 | eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + | |
617 | padding); | |
618 | if (!eth) { | |
619 | dev_kfree_skb(frame); | |
620 | goto purge; | |
621 | } | |
622 | } | |
623 | ||
624 | skb_reset_network_header(frame); | |
625 | frame->dev = skb->dev; | |
626 | frame->priority = skb->priority; | |
627 | ||
628 | payload = frame->data; | |
629 | ethertype = (payload[6] << 8) | payload[7]; | |
630 | ||
ac422d3c | 631 | if (likely((ether_addr_equal(payload, rfc1042_header) && |
eaf85ca7 | 632 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
ac422d3c | 633 | ether_addr_equal(payload, bridge_tunnel_header))) { |
eaf85ca7 ZY |
634 | /* remove RFC1042 or Bridge-Tunnel |
635 | * encapsulation and replace EtherType */ | |
636 | skb_pull(frame, 6); | |
637 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
638 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
639 | } else { | |
640 | memcpy(skb_push(frame, sizeof(__be16)), &len, | |
641 | sizeof(__be16)); | |
642 | memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); | |
643 | memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); | |
644 | } | |
645 | __skb_queue_tail(list, frame); | |
646 | } | |
647 | ||
648 | return; | |
649 | ||
650 | purge: | |
651 | __skb_queue_purge(list); | |
652 | out: | |
653 | dev_kfree_skb(skb); | |
654 | } | |
655 | EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); | |
656 | ||
e31a16d6 ZY |
657 | /* Given a data frame determine the 802.1p/1d tag to use. */ |
658 | unsigned int cfg80211_classify8021d(struct sk_buff *skb) | |
659 | { | |
660 | unsigned int dscp; | |
661 | ||
662 | /* skb->priority values from 256->263 are magic values to | |
663 | * directly indicate a specific 802.1d priority. This is used | |
664 | * to allow 802.1d priority to be passed directly in from VLAN | |
665 | * tags, etc. | |
666 | */ | |
667 | if (skb->priority >= 256 && skb->priority <= 263) | |
668 | return skb->priority - 256; | |
669 | ||
670 | switch (skb->protocol) { | |
671 | case htons(ETH_P_IP): | |
b156579b DT |
672 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
673 | break; | |
674 | case htons(ETH_P_IPV6): | |
675 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; | |
e31a16d6 ZY |
676 | break; |
677 | default: | |
678 | return 0; | |
679 | } | |
680 | ||
681 | return dscp >> 5; | |
682 | } | |
683 | EXPORT_SYMBOL(cfg80211_classify8021d); | |
517357c6 JB |
684 | |
685 | const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) | |
686 | { | |
687 | u8 *end, *pos; | |
688 | ||
689 | pos = bss->information_elements; | |
690 | if (pos == NULL) | |
691 | return NULL; | |
692 | end = pos + bss->len_information_elements; | |
693 | ||
694 | while (pos + 1 < end) { | |
695 | if (pos + 2 + pos[1] > end) | |
696 | break; | |
697 | if (pos[0] == ie) | |
698 | return pos; | |
699 | pos += 2 + pos[1]; | |
700 | } | |
701 | ||
702 | return NULL; | |
703 | } | |
704 | EXPORT_SYMBOL(ieee80211_bss_get_ie); | |
fffd0934 JB |
705 | |
706 | void cfg80211_upload_connect_keys(struct wireless_dev *wdev) | |
707 | { | |
708 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); | |
709 | struct net_device *dev = wdev->netdev; | |
710 | int i; | |
711 | ||
712 | if (!wdev->connect_keys) | |
713 | return; | |
714 | ||
715 | for (i = 0; i < 6; i++) { | |
716 | if (!wdev->connect_keys->params[i].cipher) | |
717 | continue; | |
e31b8213 | 718 | if (rdev->ops->add_key(wdev->wiphy, dev, i, false, NULL, |
1e056665 | 719 | &wdev->connect_keys->params[i])) { |
e9c0268f | 720 | netdev_err(dev, "failed to set key %d\n", i); |
1e056665 ZY |
721 | continue; |
722 | } | |
fffd0934 | 723 | if (wdev->connect_keys->def == i) |
dbd2fd65 JB |
724 | if (rdev->ops->set_default_key(wdev->wiphy, dev, |
725 | i, true, true)) { | |
e9c0268f | 726 | netdev_err(dev, "failed to set defkey %d\n", i); |
1e056665 ZY |
727 | continue; |
728 | } | |
fffd0934 JB |
729 | if (wdev->connect_keys->defmgmt == i) |
730 | if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i)) | |
e9c0268f | 731 | netdev_err(dev, "failed to set mgtdef %d\n", i); |
fffd0934 JB |
732 | } |
733 | ||
734 | kfree(wdev->connect_keys); | |
735 | wdev->connect_keys = NULL; | |
736 | } | |
3d54d255 JB |
737 | |
738 | static void cfg80211_process_wdev_events(struct wireless_dev *wdev) | |
739 | { | |
740 | struct cfg80211_event *ev; | |
741 | unsigned long flags; | |
742 | const u8 *bssid = NULL; | |
743 | ||
744 | spin_lock_irqsave(&wdev->event_lock, flags); | |
745 | while (!list_empty(&wdev->event_list)) { | |
746 | ev = list_first_entry(&wdev->event_list, | |
747 | struct cfg80211_event, list); | |
748 | list_del(&ev->list); | |
749 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
750 | ||
751 | wdev_lock(wdev); | |
752 | switch (ev->type) { | |
753 | case EVENT_CONNECT_RESULT: | |
754 | if (!is_zero_ether_addr(ev->cr.bssid)) | |
755 | bssid = ev->cr.bssid; | |
756 | __cfg80211_connect_result( | |
757 | wdev->netdev, bssid, | |
758 | ev->cr.req_ie, ev->cr.req_ie_len, | |
759 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
760 | ev->cr.status, | |
761 | ev->cr.status == WLAN_STATUS_SUCCESS, | |
762 | NULL); | |
763 | break; | |
764 | case EVENT_ROAMED: | |
adbde344 VT |
765 | __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
766 | ev->rm.req_ie_len, ev->rm.resp_ie, | |
767 | ev->rm.resp_ie_len); | |
3d54d255 JB |
768 | break; |
769 | case EVENT_DISCONNECTED: | |
770 | __cfg80211_disconnected(wdev->netdev, | |
771 | ev->dc.ie, ev->dc.ie_len, | |
772 | ev->dc.reason, true); | |
773 | break; | |
774 | case EVENT_IBSS_JOINED: | |
775 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); | |
776 | break; | |
777 | } | |
778 | wdev_unlock(wdev); | |
779 | ||
780 | kfree(ev); | |
781 | ||
782 | spin_lock_irqsave(&wdev->event_lock, flags); | |
783 | } | |
784 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
785 | } | |
786 | ||
787 | void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) | |
788 | { | |
789 | struct wireless_dev *wdev; | |
790 | ||
791 | ASSERT_RTNL(); | |
792 | ASSERT_RDEV_LOCK(rdev); | |
793 | ||
794 | mutex_lock(&rdev->devlist_mtx); | |
795 | ||
796 | list_for_each_entry(wdev, &rdev->netdev_list, list) | |
797 | cfg80211_process_wdev_events(wdev); | |
798 | ||
799 | mutex_unlock(&rdev->devlist_mtx); | |
800 | } | |
801 | ||
802 | int cfg80211_change_iface(struct cfg80211_registered_device *rdev, | |
803 | struct net_device *dev, enum nl80211_iftype ntype, | |
804 | u32 *flags, struct vif_params *params) | |
805 | { | |
806 | int err; | |
807 | enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; | |
808 | ||
809 | ASSERT_RDEV_LOCK(rdev); | |
810 | ||
811 | /* don't support changing VLANs, you just re-create them */ | |
812 | if (otype == NL80211_IFTYPE_AP_VLAN) | |
813 | return -EOPNOTSUPP; | |
814 | ||
815 | if (!rdev->ops->change_virtual_intf || | |
816 | !(rdev->wiphy.interface_modes & (1 << ntype))) | |
817 | return -EOPNOTSUPP; | |
818 | ||
ad4bb6f8 | 819 | /* if it's part of a bridge, reject changing type to station/ibss */ |
f350a0a8 | 820 | if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
074ac8df JB |
821 | (ntype == NL80211_IFTYPE_ADHOC || |
822 | ntype == NL80211_IFTYPE_STATION || | |
823 | ntype == NL80211_IFTYPE_P2P_CLIENT)) | |
ad4bb6f8 JB |
824 | return -EBUSY; |
825 | ||
f8cdddb8 | 826 | if (ntype != otype && netif_running(dev)) { |
e4e32459 | 827 | mutex_lock(&rdev->devlist_mtx); |
7527a782 JB |
828 | err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr, |
829 | ntype); | |
e4e32459 | 830 | mutex_unlock(&rdev->devlist_mtx); |
7527a782 JB |
831 | if (err) |
832 | return err; | |
833 | ||
9bc383de | 834 | dev->ieee80211_ptr->use_4addr = false; |
29cbe68c | 835 | dev->ieee80211_ptr->mesh_id_up_len = 0; |
9bc383de | 836 | |
3d54d255 | 837 | switch (otype) { |
ac800140 MK |
838 | case NL80211_IFTYPE_AP: |
839 | cfg80211_stop_ap(rdev, dev); | |
840 | break; | |
3d54d255 JB |
841 | case NL80211_IFTYPE_ADHOC: |
842 | cfg80211_leave_ibss(rdev, dev, false); | |
843 | break; | |
844 | case NL80211_IFTYPE_STATION: | |
074ac8df | 845 | case NL80211_IFTYPE_P2P_CLIENT: |
3d54d255 JB |
846 | cfg80211_disconnect(rdev, dev, |
847 | WLAN_REASON_DEAUTH_LEAVING, true); | |
848 | break; | |
849 | case NL80211_IFTYPE_MESH_POINT: | |
850 | /* mesh should be handled? */ | |
851 | break; | |
852 | default: | |
853 | break; | |
854 | } | |
855 | ||
856 | cfg80211_process_rdev_events(rdev); | |
857 | } | |
858 | ||
859 | err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev, | |
860 | ntype, flags, params); | |
861 | ||
862 | WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); | |
863 | ||
9bc383de JB |
864 | if (!err && params && params->use_4addr != -1) |
865 | dev->ieee80211_ptr->use_4addr = params->use_4addr; | |
866 | ||
ad4bb6f8 JB |
867 | if (!err) { |
868 | dev->priv_flags &= ~IFF_DONT_BRIDGE; | |
869 | switch (ntype) { | |
870 | case NL80211_IFTYPE_STATION: | |
871 | if (dev->ieee80211_ptr->use_4addr) | |
872 | break; | |
873 | /* fall through */ | |
074ac8df | 874 | case NL80211_IFTYPE_P2P_CLIENT: |
ad4bb6f8 JB |
875 | case NL80211_IFTYPE_ADHOC: |
876 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
877 | break; | |
074ac8df | 878 | case NL80211_IFTYPE_P2P_GO: |
ad4bb6f8 JB |
879 | case NL80211_IFTYPE_AP: |
880 | case NL80211_IFTYPE_AP_VLAN: | |
881 | case NL80211_IFTYPE_WDS: | |
882 | case NL80211_IFTYPE_MESH_POINT: | |
883 | /* bridging OK */ | |
884 | break; | |
885 | case NL80211_IFTYPE_MONITOR: | |
886 | /* monitor can't bridge anyway */ | |
887 | break; | |
888 | case NL80211_IFTYPE_UNSPECIFIED: | |
2e161f78 | 889 | case NUM_NL80211_IFTYPES: |
ad4bb6f8 JB |
890 | /* not happening */ |
891 | break; | |
892 | } | |
893 | } | |
894 | ||
dbbae26a MK |
895 | if (!err && ntype != otype && netif_running(dev)) { |
896 | cfg80211_update_iface_num(rdev, ntype, 1); | |
897 | cfg80211_update_iface_num(rdev, otype, -1); | |
898 | } | |
899 | ||
3d54d255 JB |
900 | return err; |
901 | } | |
254416aa JL |
902 | |
903 | u16 cfg80211_calculate_bitrate(struct rate_info *rate) | |
904 | { | |
905 | int modulation, streams, bitrate; | |
906 | ||
907 | if (!(rate->flags & RATE_INFO_FLAGS_MCS)) | |
908 | return rate->legacy; | |
909 | ||
910 | /* the formula below does only work for MCS values smaller than 32 */ | |
2615f375 | 911 | if (WARN_ON_ONCE(rate->mcs >= 32)) |
254416aa JL |
912 | return 0; |
913 | ||
914 | modulation = rate->mcs & 7; | |
915 | streams = (rate->mcs >> 3) + 1; | |
916 | ||
917 | bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? | |
918 | 13500000 : 6500000; | |
919 | ||
920 | if (modulation < 4) | |
921 | bitrate *= (modulation + 1); | |
922 | else if (modulation == 4) | |
923 | bitrate *= (modulation + 2); | |
924 | else | |
925 | bitrate *= (modulation + 3); | |
926 | ||
927 | bitrate *= streams; | |
928 | ||
929 | if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) | |
930 | bitrate = (bitrate / 9) * 10; | |
931 | ||
932 | /* do NOT round down here */ | |
933 | return (bitrate + 50000) / 100000; | |
934 | } | |
8097e149 | 935 | EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
56d1893d JB |
936 | |
937 | int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, | |
938 | u32 beacon_int) | |
939 | { | |
940 | struct wireless_dev *wdev; | |
941 | int res = 0; | |
942 | ||
943 | if (!beacon_int) | |
944 | return -EINVAL; | |
945 | ||
946 | mutex_lock(&rdev->devlist_mtx); | |
947 | ||
948 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
949 | if (!wdev->beacon_interval) | |
950 | continue; | |
951 | if (wdev->beacon_interval != beacon_int) { | |
952 | res = -EINVAL; | |
953 | break; | |
954 | } | |
955 | } | |
956 | ||
957 | mutex_unlock(&rdev->devlist_mtx); | |
958 | ||
959 | return res; | |
960 | } | |
7527a782 | 961 | |
d4e50c59 MK |
962 | int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
963 | struct wireless_dev *wdev, | |
964 | enum nl80211_iftype iftype, | |
965 | struct ieee80211_channel *chan, | |
966 | enum cfg80211_chan_mode chanmode) | |
7527a782 JB |
967 | { |
968 | struct wireless_dev *wdev_iter; | |
463454b5 | 969 | u32 used_iftypes = BIT(iftype); |
7527a782 | 970 | int num[NUM_NL80211_IFTYPES]; |
d4e50c59 MK |
971 | struct ieee80211_channel |
972 | *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; | |
973 | struct ieee80211_channel *ch; | |
974 | enum cfg80211_chan_mode chmode; | |
975 | int num_different_channels = 0; | |
7527a782 JB |
976 | int total = 1; |
977 | int i, j; | |
978 | ||
979 | ASSERT_RTNL(); | |
e4e32459 | 980 | lockdep_assert_held(&rdev->devlist_mtx); |
7527a782 JB |
981 | |
982 | /* Always allow software iftypes */ | |
983 | if (rdev->wiphy.software_iftypes & BIT(iftype)) | |
984 | return 0; | |
985 | ||
7527a782 | 986 | memset(num, 0, sizeof(num)); |
d4e50c59 | 987 | memset(used_channels, 0, sizeof(used_channels)); |
7527a782 JB |
988 | |
989 | num[iftype] = 1; | |
990 | ||
d4e50c59 MK |
991 | switch (chanmode) { |
992 | case CHAN_MODE_UNDEFINED: | |
993 | break; | |
994 | case CHAN_MODE_SHARED: | |
995 | WARN_ON(!chan); | |
996 | used_channels[0] = chan; | |
997 | num_different_channels++; | |
998 | break; | |
999 | case CHAN_MODE_EXCLUSIVE: | |
1000 | num_different_channels++; | |
1001 | break; | |
1002 | } | |
1003 | ||
7527a782 JB |
1004 | list_for_each_entry(wdev_iter, &rdev->netdev_list, list) { |
1005 | if (wdev_iter == wdev) | |
1006 | continue; | |
1007 | if (!netif_running(wdev_iter->netdev)) | |
1008 | continue; | |
1009 | ||
1010 | if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) | |
1011 | continue; | |
1012 | ||
d4e50c59 MK |
1013 | cfg80211_get_chan_state(rdev, wdev_iter, &ch, &chmode); |
1014 | ||
1015 | switch (chmode) { | |
1016 | case CHAN_MODE_UNDEFINED: | |
1017 | break; | |
1018 | case CHAN_MODE_SHARED: | |
1019 | for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) | |
1020 | if (!used_channels[i] || used_channels[i] == ch) | |
1021 | break; | |
1022 | ||
e4e32459 | 1023 | if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
d4e50c59 | 1024 | return -EBUSY; |
d4e50c59 MK |
1025 | |
1026 | if (used_channels[i] == NULL) { | |
1027 | used_channels[i] = ch; | |
1028 | num_different_channels++; | |
1029 | } | |
1030 | break; | |
1031 | case CHAN_MODE_EXCLUSIVE: | |
1032 | num_different_channels++; | |
1033 | break; | |
1034 | } | |
1035 | ||
7527a782 JB |
1036 | num[wdev_iter->iftype]++; |
1037 | total++; | |
463454b5 | 1038 | used_iftypes |= BIT(wdev_iter->iftype); |
7527a782 | 1039 | } |
7527a782 | 1040 | |
8e8b41f9 JB |
1041 | if (total == 1) |
1042 | return 0; | |
1043 | ||
7527a782 JB |
1044 | for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) { |
1045 | const struct ieee80211_iface_combination *c; | |
1046 | struct ieee80211_iface_limit *limits; | |
463454b5 | 1047 | u32 all_iftypes = 0; |
7527a782 JB |
1048 | |
1049 | c = &rdev->wiphy.iface_combinations[i]; | |
1050 | ||
d4e50c59 MK |
1051 | if (total > c->max_interfaces) |
1052 | continue; | |
1053 | if (num_different_channels > c->num_different_channels) | |
1054 | continue; | |
1055 | ||
7527a782 JB |
1056 | limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
1057 | GFP_KERNEL); | |
1058 | if (!limits) | |
1059 | return -ENOMEM; | |
7527a782 JB |
1060 | |
1061 | for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { | |
1062 | if (rdev->wiphy.software_iftypes & BIT(iftype)) | |
1063 | continue; | |
1064 | for (j = 0; j < c->n_limits; j++) { | |
463454b5 | 1065 | all_iftypes |= limits[j].types; |
e55a4046 | 1066 | if (!(limits[j].types & BIT(iftype))) |
7527a782 JB |
1067 | continue; |
1068 | if (limits[j].max < num[iftype]) | |
1069 | goto cont; | |
1070 | limits[j].max -= num[iftype]; | |
1071 | } | |
1072 | } | |
463454b5 JB |
1073 | |
1074 | /* | |
1075 | * Finally check that all iftypes that we're currently | |
1076 | * using are actually part of this combination. If they | |
1077 | * aren't then we can't use this combination and have | |
1078 | * to continue to the next. | |
1079 | */ | |
1080 | if ((all_iftypes & used_iftypes) != used_iftypes) | |
1081 | goto cont; | |
1082 | ||
1083 | /* | |
1084 | * This combination covered all interface types and | |
1085 | * supported the requested numbers, so we're good. | |
1086 | */ | |
7527a782 JB |
1087 | kfree(limits); |
1088 | return 0; | |
1089 | cont: | |
1090 | kfree(limits); | |
1091 | } | |
1092 | ||
1093 | return -EBUSY; | |
1094 | } | |
34850ab2 JB |
1095 | |
1096 | int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, | |
1097 | const u8 *rates, unsigned int n_rates, | |
1098 | u32 *mask) | |
1099 | { | |
1100 | int i, j; | |
1101 | ||
a401d2bb JB |
1102 | if (!sband) |
1103 | return -EINVAL; | |
1104 | ||
34850ab2 JB |
1105 | if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
1106 | return -EINVAL; | |
1107 | ||
1108 | *mask = 0; | |
1109 | ||
1110 | for (i = 0; i < n_rates; i++) { | |
1111 | int rate = (rates[i] & 0x7f) * 5; | |
1112 | bool found = false; | |
1113 | ||
1114 | for (j = 0; j < sband->n_bitrates; j++) { | |
1115 | if (sband->bitrates[j].bitrate == rate) { | |
1116 | found = true; | |
1117 | *mask |= BIT(j); | |
1118 | break; | |
1119 | } | |
1120 | } | |
1121 | if (!found) | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * mask must have at least one bit set here since we | |
1127 | * didn't accept a 0-length rates array nor allowed | |
1128 | * entries in the array that didn't exist | |
1129 | */ | |
1130 | ||
1131 | return 0; | |
1132 | } | |
11a2a357 JB |
1133 | |
1134 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
1135 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
1136 | const unsigned char rfc1042_header[] __aligned(2) = | |
1137 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
1138 | EXPORT_SYMBOL(rfc1042_header); | |
1139 | ||
1140 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
1141 | const unsigned char bridge_tunnel_header[] __aligned(2) = | |
1142 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
1143 | EXPORT_SYMBOL(bridge_tunnel_header); |