blob: 6903dbdcb8c1f03bcef684ad1074e3dea9f18e18 [file] [log] [blame]
Johannes Berg8318d782008-01-24 19:38:38 +01001/*
2 * Wireless utility functions
3 *
Johannes Bergd3236552009-04-20 14:31:42 +02004 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
Johannes Berg2740f0c2014-09-03 15:24:58 +03005 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berg8318d782008-01-24 19:38:38 +01006 */
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -04007#include <linux/export.h>
Johannes Bergd3236552009-04-20 14:31:42 +02008#include <linux/bitops.h>
Zhu Yie31a16d2009-05-21 21:47:03 +08009#include <linux/etherdevice.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Johannes Bergd3236552009-04-20 14:31:42 +020011#include <net/cfg80211.h>
Zhu Yie31a16d2009-05-21 21:47:03 +080012#include <net/ip.h>
Dave Tähtb1565792011-12-22 12:55:08 -080013#include <net/dsfield.h>
cedric Vonckenc6ca5e22013-08-26 14:04:52 +020014#include <linux/if_vlan.h>
Simon Wunderlich960d97f2014-03-03 17:23:12 +010015#include <linux/mpls.h>
Johannes Berg8318d782008-01-24 19:38:38 +010016#include "core.h"
Hila Gonene35e4d22012-06-27 17:19:42 +030017#include "rdev-ops.h"
18
Johannes Berg8318d782008-01-24 19:38:38 +010019
Johannes Bergbd815252008-10-29 20:00:45 +010020struct ieee80211_rate *
21ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
Johannes Berg881d9482009-01-21 15:13:48 +010022 u32 basic_rates, int bitrate)
Johannes Bergbd815252008-10-29 20:00:45 +010023{
24 struct ieee80211_rate *result = &sband->bitrates[0];
25 int i;
26
27 for (i = 0; i < sband->n_bitrates; i++) {
28 if (!(basic_rates & BIT(i)))
29 continue;
30 if (sband->bitrates[i].bitrate > bitrate)
31 continue;
32 result = &sband->bitrates[i];
33 }
34
35 return result;
36}
37EXPORT_SYMBOL(ieee80211_get_response_rate);
38
Simon Wunderlich74608ac2013-07-08 16:55:54 +020039u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
40 enum nl80211_bss_scan_width scan_width)
Ashok Nagarajanb422c6c2013-05-10 17:50:51 -070041{
42 struct ieee80211_rate *bitrates;
43 u32 mandatory_rates = 0;
44 enum ieee80211_rate_flags mandatory_flag;
45 int i;
46
47 if (WARN_ON(!sband))
48 return 1;
49
Simon Wunderlich74608ac2013-07-08 16:55:54 +020050 if (sband->band == IEEE80211_BAND_2GHZ) {
51 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
52 scan_width == NL80211_BSS_CHAN_WIDTH_10)
53 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
54 else
55 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
56 } else {
Ashok Nagarajanb422c6c2013-05-10 17:50:51 -070057 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
Simon Wunderlich74608ac2013-07-08 16:55:54 +020058 }
Ashok Nagarajanb422c6c2013-05-10 17:50:51 -070059
60 bitrates = sband->bitrates;
61 for (i = 0; i < sband->n_bitrates; i++)
62 if (bitrates[i].flags & mandatory_flag)
63 mandatory_rates |= BIT(i);
64 return mandatory_rates;
65}
66EXPORT_SYMBOL(ieee80211_mandatory_rates);
67
Bruno Randolf59eb21a2011-01-17 13:37:28 +090068int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
Johannes Berg8318d782008-01-24 19:38:38 +010069{
Bruno Randolf59eb21a2011-01-17 13:37:28 +090070 /* see 802.11 17.3.8.3.2 and Annex J
71 * there are overlapping channel numbers in 5GHz and 2GHz bands */
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +030072 if (chan <= 0)
73 return 0; /* not supported */
74 switch (band) {
75 case IEEE80211_BAND_2GHZ:
Bruno Randolf59eb21a2011-01-17 13:37:28 +090076 if (chan == 14)
77 return 2484;
78 else if (chan < 14)
79 return 2407 + chan * 5;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +030080 break;
81 case IEEE80211_BAND_5GHZ:
82 if (chan >= 182 && chan <= 196)
83 return 4000 + chan * 5;
Bruno Randolf59eb21a2011-01-17 13:37:28 +090084 else
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +030085 return 5000 + chan * 5;
86 break;
87 case IEEE80211_BAND_60GHZ:
88 if (chan < 5)
89 return 56160 + chan * 2160;
90 break;
91 default:
92 ;
Bruno Randolf59eb21a2011-01-17 13:37:28 +090093 }
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +030094 return 0; /* not supported */
Johannes Berg8318d782008-01-24 19:38:38 +010095}
96EXPORT_SYMBOL(ieee80211_channel_to_frequency);
97
98int ieee80211_frequency_to_channel(int freq)
99{
Bruno Randolf59eb21a2011-01-17 13:37:28 +0900100 /* see 802.11 17.3.8.3.2 and Annex J */
Johannes Berg8318d782008-01-24 19:38:38 +0100101 if (freq == 2484)
102 return 14;
Bruno Randolf59eb21a2011-01-17 13:37:28 +0900103 else if (freq < 2484)
Johannes Berg8318d782008-01-24 19:38:38 +0100104 return (freq - 2407) / 5;
Bruno Randolf59eb21a2011-01-17 13:37:28 +0900105 else if (freq >= 4910 && freq <= 4980)
106 return (freq - 4000) / 5;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300107 else if (freq <= 45000) /* DMG band lower limit */
Bruno Randolf59eb21a2011-01-17 13:37:28 +0900108 return (freq - 5000) / 5;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300109 else if (freq >= 58320 && freq <= 64800)
110 return (freq - 56160) / 2160;
111 else
112 return 0;
Johannes Berg8318d782008-01-24 19:38:38 +0100113}
114EXPORT_SYMBOL(ieee80211_frequency_to_channel);
115
Johannes Berg6c507cd2008-03-26 14:14:55 +0100116struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
117 int freq)
Johannes Berg906c7302008-03-16 18:34:33 +0100118{
119 enum ieee80211_band band;
120 struct ieee80211_supported_band *sband;
121 int i;
122
123 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
124 sband = wiphy->bands[band];
125
126 if (!sband)
127 continue;
128
129 for (i = 0; i < sband->n_channels; i++) {
130 if (sband->channels[i].center_freq == freq)
131 return &sband->channels[i];
132 }
133 }
134
135 return NULL;
136}
Johannes Berg6c507cd2008-03-26 14:14:55 +0100137EXPORT_SYMBOL(__ieee80211_get_channel);
Johannes Berg906c7302008-03-16 18:34:33 +0100138
Johannes Berg8318d782008-01-24 19:38:38 +0100139static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
140 enum ieee80211_band band)
141{
142 int i, want;
143
144 switch (band) {
145 case IEEE80211_BAND_5GHZ:
146 want = 3;
147 for (i = 0; i < sband->n_bitrates; i++) {
148 if (sband->bitrates[i].bitrate == 60 ||
149 sband->bitrates[i].bitrate == 120 ||
150 sband->bitrates[i].bitrate == 240) {
151 sband->bitrates[i].flags |=
152 IEEE80211_RATE_MANDATORY_A;
153 want--;
154 }
155 }
156 WARN_ON(want);
157 break;
158 case IEEE80211_BAND_2GHZ:
159 want = 7;
160 for (i = 0; i < sband->n_bitrates; i++) {
161 if (sband->bitrates[i].bitrate == 10) {
162 sband->bitrates[i].flags |=
163 IEEE80211_RATE_MANDATORY_B |
164 IEEE80211_RATE_MANDATORY_G;
165 want--;
166 }
167
168 if (sband->bitrates[i].bitrate == 20 ||
169 sband->bitrates[i].bitrate == 55 ||
170 sband->bitrates[i].bitrate == 110 ||
171 sband->bitrates[i].bitrate == 60 ||
172 sband->bitrates[i].bitrate == 120 ||
173 sband->bitrates[i].bitrate == 240) {
174 sband->bitrates[i].flags |=
175 IEEE80211_RATE_MANDATORY_G;
176 want--;
177 }
178
Johannes Bergaac09fb2008-01-30 17:36:10 +0100179 if (sband->bitrates[i].bitrate != 10 &&
180 sband->bitrates[i].bitrate != 20 &&
181 sband->bitrates[i].bitrate != 55 &&
182 sband->bitrates[i].bitrate != 110)
Johannes Berg8318d782008-01-24 19:38:38 +0100183 sband->bitrates[i].flags |=
184 IEEE80211_RATE_ERP_G;
185 }
Ivo van Doorn406f2382008-02-02 23:53:10 +0100186 WARN_ON(want != 0 && want != 3 && want != 6);
Johannes Berg8318d782008-01-24 19:38:38 +0100187 break;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300188 case IEEE80211_BAND_60GHZ:
189 /* check for mandatory HT MCS 1..4 */
190 WARN_ON(!sband->ht_cap.ht_supported);
191 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
192 break;
Johannes Berg8318d782008-01-24 19:38:38 +0100193 case IEEE80211_NUM_BANDS:
194 WARN_ON(1);
195 break;
196 }
197}
198
199void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
200{
201 enum ieee80211_band band;
202
203 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
204 if (wiphy->bands[band])
205 set_mandatory_flags_band(wiphy->bands[band], band);
206}
Johannes Berg08645122009-05-11 13:54:58 +0200207
Jouni Malinen38ba3c52011-09-21 18:14:56 +0300208bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
209{
210 int i;
211 for (i = 0; i < wiphy->n_cipher_suites; i++)
212 if (cipher == wiphy->cipher_suites[i])
213 return true;
214 return false;
215}
216
Johannes Bergfffd0932009-07-08 14:22:54 +0200217int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
218 struct key_params *params, int key_idx,
Johannes Berge31b8212010-10-05 19:39:30 +0200219 bool pairwise, const u8 *mac_addr)
Johannes Berg08645122009-05-11 13:54:58 +0200220{
221 if (key_idx > 5)
222 return -EINVAL;
223
Johannes Berge31b8212010-10-05 19:39:30 +0200224 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
225 return -EINVAL;
226
227 if (pairwise && !mac_addr)
228 return -EINVAL;
229
Jouni Malinen37720562015-01-24 19:52:04 +0200230 switch (params->cipher) {
231 case WLAN_CIPHER_SUITE_TKIP:
232 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinencfcf1682015-01-24 19:52:05 +0200233 case WLAN_CIPHER_SUITE_CCMP_256:
234 case WLAN_CIPHER_SUITE_GCMP:
235 case WLAN_CIPHER_SUITE_GCMP_256:
Jouni Malinen37720562015-01-24 19:52:04 +0200236 /* Disallow pairwise keys with non-zero index unless it's WEP
237 * or a vendor specific cipher (because current deployments use
238 * pairwise WEP keys with non-zero indices and for vendor
239 * specific ciphers this should be validated in the driver or
240 * hardware level - but 802.11i clearly specifies to use zero)
241 */
242 if (pairwise && key_idx)
243 return -EINVAL;
244 break;
245 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinencfcf1682015-01-24 19:52:05 +0200246 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
247 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
248 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
Jouni Malinen37720562015-01-24 19:52:04 +0200249 /* Disallow BIP (group-only) cipher as pairwise cipher */
250 if (pairwise)
251 return -EINVAL;
252 break;
253 default:
254 break;
255 }
Johannes Berg08645122009-05-11 13:54:58 +0200256
Johannes Berg08645122009-05-11 13:54:58 +0200257 switch (params->cipher) {
258 case WLAN_CIPHER_SUITE_WEP40:
Johannes Berg8fc0fee2009-05-24 16:57:19 +0200259 if (params->key_len != WLAN_KEY_LEN_WEP40)
Johannes Berg08645122009-05-11 13:54:58 +0200260 return -EINVAL;
261 break;
262 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berg8fc0fee2009-05-24 16:57:19 +0200263 if (params->key_len != WLAN_KEY_LEN_TKIP)
Johannes Berg08645122009-05-11 13:54:58 +0200264 return -EINVAL;
265 break;
266 case WLAN_CIPHER_SUITE_CCMP:
Johannes Berg8fc0fee2009-05-24 16:57:19 +0200267 if (params->key_len != WLAN_KEY_LEN_CCMP)
Johannes Berg08645122009-05-11 13:54:58 +0200268 return -EINVAL;
269 break;
Jouni Malinencfcf1682015-01-24 19:52:05 +0200270 case WLAN_CIPHER_SUITE_CCMP_256:
271 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
272 return -EINVAL;
273 break;
274 case WLAN_CIPHER_SUITE_GCMP:
275 if (params->key_len != WLAN_KEY_LEN_GCMP)
276 return -EINVAL;
277 break;
278 case WLAN_CIPHER_SUITE_GCMP_256:
279 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
280 return -EINVAL;
281 break;
Johannes Berg08645122009-05-11 13:54:58 +0200282 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berg8fc0fee2009-05-24 16:57:19 +0200283 if (params->key_len != WLAN_KEY_LEN_WEP104)
Johannes Berg08645122009-05-11 13:54:58 +0200284 return -EINVAL;
285 break;
286 case WLAN_CIPHER_SUITE_AES_CMAC:
Johannes Berg8fc0fee2009-05-24 16:57:19 +0200287 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
Johannes Berg08645122009-05-11 13:54:58 +0200288 return -EINVAL;
289 break;
Jouni Malinencfcf1682015-01-24 19:52:05 +0200290 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
291 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
292 return -EINVAL;
293 break;
294 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
295 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
296 return -EINVAL;
297 break;
298 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
299 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
300 return -EINVAL;
301 break;
Johannes Berg08645122009-05-11 13:54:58 +0200302 default:
Johannes Berg7d64b7c2010-08-27 14:26:51 +0300303 /*
304 * We don't know anything about this algorithm,
305 * allow using it -- but the driver must check
306 * all parameters! We still check below whether
307 * or not the driver supports this algorithm,
308 * of course.
309 */
310 break;
Johannes Berg08645122009-05-11 13:54:58 +0200311 }
312
Jouni Malinen9f26a952009-05-15 12:38:32 +0300313 if (params->seq) {
314 switch (params->cipher) {
315 case WLAN_CIPHER_SUITE_WEP40:
316 case WLAN_CIPHER_SUITE_WEP104:
317 /* These ciphers do not use key sequence */
318 return -EINVAL;
319 case WLAN_CIPHER_SUITE_TKIP:
320 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinencfcf1682015-01-24 19:52:05 +0200321 case WLAN_CIPHER_SUITE_CCMP_256:
322 case WLAN_CIPHER_SUITE_GCMP:
323 case WLAN_CIPHER_SUITE_GCMP_256:
Jouni Malinen9f26a952009-05-15 12:38:32 +0300324 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinencfcf1682015-01-24 19:52:05 +0200325 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
326 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
327 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
Jouni Malinen9f26a952009-05-15 12:38:32 +0300328 if (params->seq_len != 6)
329 return -EINVAL;
330 break;
331 }
332 }
333
Jouni Malinen38ba3c52011-09-21 18:14:56 +0300334 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
Johannes Bergfffd0932009-07-08 14:22:54 +0200335 return -EINVAL;
336
Johannes Berg08645122009-05-11 13:54:58 +0200337 return 0;
338}
Zhu Yie31a16d2009-05-21 21:47:03 +0800339
Johannes Berg633adf12010-08-12 14:49:58 +0200340unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
Zhu Yie31a16d2009-05-21 21:47:03 +0800341{
342 unsigned int hdrlen = 24;
343
344 if (ieee80211_is_data(fc)) {
345 if (ieee80211_has_a4(fc))
346 hdrlen = 30;
Andriy Tkachukd0dd2de2010-01-20 13:55:06 +0200347 if (ieee80211_is_data_qos(fc)) {
Zhu Yie31a16d2009-05-21 21:47:03 +0800348 hdrlen += IEEE80211_QOS_CTL_LEN;
Andriy Tkachukd0dd2de2010-01-20 13:55:06 +0200349 if (ieee80211_has_order(fc))
350 hdrlen += IEEE80211_HT_CTL_LEN;
351 }
Zhu Yie31a16d2009-05-21 21:47:03 +0800352 goto out;
353 }
354
Fred Choufb142f42015-01-20 10:17:27 +0800355 if (ieee80211_is_mgmt(fc)) {
356 if (ieee80211_has_order(fc))
357 hdrlen += IEEE80211_HT_CTL_LEN;
358 goto out;
359 }
360
Zhu Yie31a16d2009-05-21 21:47:03 +0800361 if (ieee80211_is_ctl(fc)) {
362 /*
363 * ACK and CTS are 10 bytes, all others 16. To see how
364 * to get this condition consider
365 * subtype mask: 0b0000000011110000 (0x00F0)
366 * ACK subtype: 0b0000000011010000 (0x00D0)
367 * CTS subtype: 0b0000000011000000 (0x00C0)
368 * bits that matter: ^^^ (0x00E0)
369 * value of those: 0b0000000011000000 (0x00C0)
370 */
371 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
372 hdrlen = 10;
373 else
374 hdrlen = 16;
375 }
376out:
377 return hdrlen;
378}
379EXPORT_SYMBOL(ieee80211_hdrlen);
380
381unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
382{
383 const struct ieee80211_hdr *hdr =
384 (const struct ieee80211_hdr *)skb->data;
385 unsigned int hdrlen;
386
387 if (unlikely(skb->len < 10))
388 return 0;
389 hdrlen = ieee80211_hdrlen(hdr->frame_control);
390 if (unlikely(hdrlen > skb->len))
391 return 0;
392 return hdrlen;
393}
394EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
395
Johannes Berg9b395bc2012-10-26 00:36:40 +0200396unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
Zhu Yie31a16d2009-05-21 21:47:03 +0800397{
398 int ae = meshhdr->flags & MESH_FLAGS_AE;
Johannes Berg7dd111e2012-10-25 21:51:59 +0200399 /* 802.11-2012, 8.2.4.7.3 */
Zhu Yie31a16d2009-05-21 21:47:03 +0800400 switch (ae) {
Johannes Berg7dd111e2012-10-25 21:51:59 +0200401 default:
Zhu Yie31a16d2009-05-21 21:47:03 +0800402 case 0:
403 return 6;
Javier Cardona3c5772a2009-08-10 12:15:48 -0700404 case MESH_FLAGS_AE_A4:
Zhu Yie31a16d2009-05-21 21:47:03 +0800405 return 12;
Javier Cardona3c5772a2009-08-10 12:15:48 -0700406 case MESH_FLAGS_AE_A5_A6:
Zhu Yie31a16d2009-05-21 21:47:03 +0800407 return 18;
Zhu Yie31a16d2009-05-21 21:47:03 +0800408 }
409}
Johannes Berg9b395bc2012-10-26 00:36:40 +0200410EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
Zhu Yie31a16d2009-05-21 21:47:03 +0800411
Zhu Yieaf85ca2009-12-01 10:18:37 +0800412int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
Zhu Yie31a16d2009-05-21 21:47:03 +0800413 enum nl80211_iftype iftype)
414{
415 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
416 u16 hdrlen, ethertype;
417 u8 *payload;
418 u8 dst[ETH_ALEN];
419 u8 src[ETH_ALEN] __aligned(2);
420
421 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
422 return -1;
423
424 hdrlen = ieee80211_hdrlen(hdr->frame_control);
425
426 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
427 * header
428 * IEEE 802.11 address fields:
429 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
430 * 0 0 DA SA BSSID n/a
431 * 0 1 DA BSSID SA n/a
432 * 1 0 BSSID SA DA n/a
433 * 1 1 RA TA DA SA
434 */
435 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
436 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
437
438 switch (hdr->frame_control &
439 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
440 case cpu_to_le16(IEEE80211_FCTL_TODS):
441 if (unlikely(iftype != NL80211_IFTYPE_AP &&
Johannes Berg074ac8d2010-09-16 14:58:22 +0200442 iftype != NL80211_IFTYPE_AP_VLAN &&
443 iftype != NL80211_IFTYPE_P2P_GO))
Zhu Yie31a16d2009-05-21 21:47:03 +0800444 return -1;
445 break;
446 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
447 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
Felix Fietkauf14543ee2009-11-10 20:10:05 +0100448 iftype != NL80211_IFTYPE_MESH_POINT &&
449 iftype != NL80211_IFTYPE_AP_VLAN &&
450 iftype != NL80211_IFTYPE_STATION))
Zhu Yie31a16d2009-05-21 21:47:03 +0800451 return -1;
452 if (iftype == NL80211_IFTYPE_MESH_POINT) {
453 struct ieee80211s_hdr *meshdr =
454 (struct ieee80211s_hdr *) (skb->data + hdrlen);
Zhu Yie3cf8b32010-03-29 17:35:07 +0800455 /* make sure meshdr->flags is on the linear part */
456 if (!pskb_may_pull(skb, hdrlen + 1))
457 return -1;
Johannes Berg7dd111e2012-10-25 21:51:59 +0200458 if (meshdr->flags & MESH_FLAGS_AE_A4)
459 return -1;
Zhu Yie31a16d2009-05-21 21:47:03 +0800460 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
Zhu Yie3cf8b32010-03-29 17:35:07 +0800461 skb_copy_bits(skb, hdrlen +
462 offsetof(struct ieee80211s_hdr, eaddr1),
463 dst, ETH_ALEN);
464 skb_copy_bits(skb, hdrlen +
465 offsetof(struct ieee80211s_hdr, eaddr2),
466 src, ETH_ALEN);
Zhu Yie31a16d2009-05-21 21:47:03 +0800467 }
Zhu Yie3cf8b32010-03-29 17:35:07 +0800468 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
Zhu Yie31a16d2009-05-21 21:47:03 +0800469 }
470 break;
471 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
Javier Cardona3c5772a2009-08-10 12:15:48 -0700472 if ((iftype != NL80211_IFTYPE_STATION &&
Johannes Berg074ac8d2010-09-16 14:58:22 +0200473 iftype != NL80211_IFTYPE_P2P_CLIENT &&
474 iftype != NL80211_IFTYPE_MESH_POINT) ||
Zhu Yie31a16d2009-05-21 21:47:03 +0800475 (is_multicast_ether_addr(dst) &&
Joe Perches4c764722012-05-08 18:56:56 +0000476 ether_addr_equal(src, addr)))
Zhu Yie31a16d2009-05-21 21:47:03 +0800477 return -1;
Javier Cardona3c5772a2009-08-10 12:15:48 -0700478 if (iftype == NL80211_IFTYPE_MESH_POINT) {
479 struct ieee80211s_hdr *meshdr =
480 (struct ieee80211s_hdr *) (skb->data + hdrlen);
Zhu Yie3cf8b32010-03-29 17:35:07 +0800481 /* make sure meshdr->flags is on the linear part */
482 if (!pskb_may_pull(skb, hdrlen + 1))
483 return -1;
Johannes Berg7dd111e2012-10-25 21:51:59 +0200484 if (meshdr->flags & MESH_FLAGS_AE_A5_A6)
485 return -1;
Javier Cardona3c5772a2009-08-10 12:15:48 -0700486 if (meshdr->flags & MESH_FLAGS_AE_A4)
Zhu Yie3cf8b32010-03-29 17:35:07 +0800487 skb_copy_bits(skb, hdrlen +
488 offsetof(struct ieee80211s_hdr, eaddr1),
489 src, ETH_ALEN);
490 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
Javier Cardona3c5772a2009-08-10 12:15:48 -0700491 }
Zhu Yie31a16d2009-05-21 21:47:03 +0800492 break;
493 case cpu_to_le16(0):
Arik Nemtsov941c93c2011-09-28 14:12:54 +0300494 if (iftype != NL80211_IFTYPE_ADHOC &&
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100495 iftype != NL80211_IFTYPE_STATION &&
496 iftype != NL80211_IFTYPE_OCB)
Arik Nemtsov941c93c2011-09-28 14:12:54 +0300497 return -1;
Zhu Yie31a16d2009-05-21 21:47:03 +0800498 break;
499 }
500
Zhu Yie3cf8b32010-03-29 17:35:07 +0800501 if (!pskb_may_pull(skb, hdrlen + 8))
Zhu Yie31a16d2009-05-21 21:47:03 +0800502 return -1;
503
504 payload = skb->data + hdrlen;
505 ethertype = (payload[6] << 8) | payload[7];
506
Joe Perches4c764722012-05-08 18:56:56 +0000507 if (likely((ether_addr_equal(payload, rfc1042_header) &&
Zhu Yie31a16d2009-05-21 21:47:03 +0800508 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
Joe Perches4c764722012-05-08 18:56:56 +0000509 ether_addr_equal(payload, bridge_tunnel_header))) {
Zhu Yie31a16d2009-05-21 21:47:03 +0800510 /* remove RFC1042 or Bridge-Tunnel encapsulation and
511 * replace EtherType */
512 skb_pull(skb, hdrlen + 6);
513 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
514 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
515 } else {
516 struct ethhdr *ehdr;
517 __be16 len;
518
519 skb_pull(skb, hdrlen);
520 len = htons(skb->len);
521 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
522 memcpy(ehdr->h_dest, dst, ETH_ALEN);
523 memcpy(ehdr->h_source, src, ETH_ALEN);
524 ehdr->h_proto = len;
525 }
526 return 0;
527}
528EXPORT_SYMBOL(ieee80211_data_to_8023);
529
Zhu Yieaf85ca2009-12-01 10:18:37 +0800530int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
Johannes Bergc1e5f472014-05-19 17:53:16 +0200531 enum nl80211_iftype iftype,
532 const u8 *bssid, bool qos)
Zhu Yie31a16d2009-05-21 21:47:03 +0800533{
534 struct ieee80211_hdr hdr;
535 u16 hdrlen, ethertype;
536 __le16 fc;
537 const u8 *encaps_data;
538 int encaps_len, skip_header_bytes;
539 int nh_pos, h_pos;
540 int head_need;
541
542 if (unlikely(skb->len < ETH_HLEN))
543 return -EINVAL;
544
545 nh_pos = skb_network_header(skb) - skb->data;
546 h_pos = skb_transport_header(skb) - skb->data;
547
548 /* convert Ethernet header to proper 802.11 header (based on
549 * operation mode) */
550 ethertype = (skb->data[12] << 8) | skb->data[13];
551 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
552
553 switch (iftype) {
554 case NL80211_IFTYPE_AP:
555 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg074ac8d2010-09-16 14:58:22 +0200556 case NL80211_IFTYPE_P2P_GO:
Zhu Yie31a16d2009-05-21 21:47:03 +0800557 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
558 /* DA BSSID SA */
559 memcpy(hdr.addr1, skb->data, ETH_ALEN);
560 memcpy(hdr.addr2, addr, ETH_ALEN);
561 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
562 hdrlen = 24;
563 break;
564 case NL80211_IFTYPE_STATION:
Johannes Berg074ac8d2010-09-16 14:58:22 +0200565 case NL80211_IFTYPE_P2P_CLIENT:
Zhu Yie31a16d2009-05-21 21:47:03 +0800566 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
567 /* BSSID SA DA */
568 memcpy(hdr.addr1, bssid, ETH_ALEN);
569 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
570 memcpy(hdr.addr3, skb->data, ETH_ALEN);
571 hdrlen = 24;
572 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100573 case NL80211_IFTYPE_OCB:
Zhu Yie31a16d2009-05-21 21:47:03 +0800574 case NL80211_IFTYPE_ADHOC:
575 /* DA SA BSSID */
576 memcpy(hdr.addr1, skb->data, ETH_ALEN);
577 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
578 memcpy(hdr.addr3, bssid, ETH_ALEN);
579 hdrlen = 24;
580 break;
581 default:
582 return -EOPNOTSUPP;
583 }
584
585 if (qos) {
586 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
587 hdrlen += 2;
588 }
589
590 hdr.frame_control = fc;
591 hdr.duration_id = 0;
592 hdr.seq_ctrl = 0;
593
594 skip_header_bytes = ETH_HLEN;
595 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
596 encaps_data = bridge_tunnel_header;
597 encaps_len = sizeof(bridge_tunnel_header);
598 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +0900599 } else if (ethertype >= ETH_P_802_3_MIN) {
Zhu Yie31a16d2009-05-21 21:47:03 +0800600 encaps_data = rfc1042_header;
601 encaps_len = sizeof(rfc1042_header);
602 skip_header_bytes -= 2;
603 } else {
604 encaps_data = NULL;
605 encaps_len = 0;
606 }
607
608 skb_pull(skb, skip_header_bytes);
609 nh_pos -= skip_header_bytes;
610 h_pos -= skip_header_bytes;
611
612 head_need = hdrlen + encaps_len - skb_headroom(skb);
613
614 if (head_need > 0 || skb_cloned(skb)) {
615 head_need = max(head_need, 0);
616 if (head_need)
617 skb_orphan(skb);
618
Joe Perches24616152011-08-29 14:17:41 -0700619 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
Zhu Yie31a16d2009-05-21 21:47:03 +0800620 return -ENOMEM;
Joe Perches24616152011-08-29 14:17:41 -0700621
Zhu Yie31a16d2009-05-21 21:47:03 +0800622 skb->truesize += head_need;
623 }
624
625 if (encaps_data) {
626 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
627 nh_pos += encaps_len;
628 h_pos += encaps_len;
629 }
630
631 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
632
633 nh_pos += hdrlen;
634 h_pos += hdrlen;
635
636 /* Update skb pointers to various headers since this modified frame
637 * is going to go through Linux networking code that may potentially
638 * need things like pointer to IP header. */
639 skb_set_mac_header(skb, 0);
640 skb_set_network_header(skb, nh_pos);
641 skb_set_transport_header(skb, h_pos);
642
643 return 0;
644}
645EXPORT_SYMBOL(ieee80211_data_from_8023);
646
Zhu Yieaf85ca2009-12-01 10:18:37 +0800647
648void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
649 const u8 *addr, enum nl80211_iftype iftype,
Yogesh Ashok Powar8b3beca2011-05-13 11:22:31 -0700650 const unsigned int extra_headroom,
651 bool has_80211_header)
Zhu Yieaf85ca2009-12-01 10:18:37 +0800652{
653 struct sk_buff *frame = NULL;
654 u16 ethertype;
655 u8 *payload;
656 const struct ethhdr *eth;
657 int remaining, err;
658 u8 dst[ETH_ALEN], src[ETH_ALEN];
659
Yogesh Ashok Powar8b3beca2011-05-13 11:22:31 -0700660 if (has_80211_header) {
661 err = ieee80211_data_to_8023(skb, addr, iftype);
662 if (err)
663 goto out;
Zhu Yieaf85ca2009-12-01 10:18:37 +0800664
Yogesh Ashok Powar8b3beca2011-05-13 11:22:31 -0700665 /* skip the wrapping header */
666 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
667 if (!eth)
668 goto out;
669 } else {
670 eth = (struct ethhdr *) skb->data;
671 }
Zhu Yieaf85ca2009-12-01 10:18:37 +0800672
673 while (skb != frame) {
674 u8 padding;
675 __be16 len = eth->h_proto;
676 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
677
678 remaining = skb->len;
679 memcpy(dst, eth->h_dest, ETH_ALEN);
680 memcpy(src, eth->h_source, ETH_ALEN);
681
682 padding = (4 - subframe_len) & 0x3;
683 /* the last MSDU has no padding */
684 if (subframe_len > remaining)
685 goto purge;
686
687 skb_pull(skb, sizeof(struct ethhdr));
688 /* reuse skb for the last subframe */
689 if (remaining <= subframe_len + padding)
690 frame = skb;
691 else {
692 unsigned int hlen = ALIGN(extra_headroom, 4);
693 /*
694 * Allocate and reserve two bytes more for payload
695 * alignment since sizeof(struct ethhdr) is 14.
696 */
697 frame = dev_alloc_skb(hlen + subframe_len + 2);
698 if (!frame)
699 goto purge;
700
701 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
702 memcpy(skb_put(frame, ntohs(len)), skb->data,
703 ntohs(len));
704
705 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
706 padding);
707 if (!eth) {
708 dev_kfree_skb(frame);
709 goto purge;
710 }
711 }
712
713 skb_reset_network_header(frame);
714 frame->dev = skb->dev;
715 frame->priority = skb->priority;
716
717 payload = frame->data;
718 ethertype = (payload[6] << 8) | payload[7];
719
Joe Perchesac422d32012-05-08 18:56:55 +0000720 if (likely((ether_addr_equal(payload, rfc1042_header) &&
Zhu Yieaf85ca2009-12-01 10:18:37 +0800721 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
Joe Perchesac422d32012-05-08 18:56:55 +0000722 ether_addr_equal(payload, bridge_tunnel_header))) {
Zhu Yieaf85ca2009-12-01 10:18:37 +0800723 /* remove RFC1042 or Bridge-Tunnel
724 * encapsulation and replace EtherType */
725 skb_pull(frame, 6);
726 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
727 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
728 } else {
729 memcpy(skb_push(frame, sizeof(__be16)), &len,
730 sizeof(__be16));
731 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
732 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
733 }
734 __skb_queue_tail(list, frame);
735 }
736
737 return;
738
739 purge:
740 __skb_queue_purge(list);
741 out:
742 dev_kfree_skb(skb);
743}
744EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
745
Zhu Yie31a16d2009-05-21 21:47:03 +0800746/* Given a data frame determine the 802.1p/1d tag to use. */
Kyeyoon Parkfa9ffc72013-12-16 23:01:30 -0800747unsigned int cfg80211_classify8021d(struct sk_buff *skb,
748 struct cfg80211_qos_map *qos_map)
Zhu Yie31a16d2009-05-21 21:47:03 +0800749{
750 unsigned int dscp;
cedric Vonckenc6ca5e22013-08-26 14:04:52 +0200751 unsigned char vlan_priority;
Zhu Yie31a16d2009-05-21 21:47:03 +0800752
753 /* skb->priority values from 256->263 are magic values to
754 * directly indicate a specific 802.1d priority. This is used
755 * to allow 802.1d priority to be passed directly in from VLAN
756 * tags, etc.
757 */
758 if (skb->priority >= 256 && skb->priority <= 263)
759 return skb->priority - 256;
760
Jiri Pirkodf8a39d2015-01-13 17:13:44 +0100761 if (skb_vlan_tag_present(skb)) {
762 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
cedric Vonckenc6ca5e22013-08-26 14:04:52 +0200763 >> VLAN_PRIO_SHIFT;
764 if (vlan_priority > 0)
765 return vlan_priority;
766 }
767
Zhu Yie31a16d2009-05-21 21:47:03 +0800768 switch (skb->protocol) {
769 case htons(ETH_P_IP):
Dave Tähtb1565792011-12-22 12:55:08 -0800770 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
771 break;
772 case htons(ETH_P_IPV6):
773 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
Zhu Yie31a16d2009-05-21 21:47:03 +0800774 break;
Simon Wunderlich960d97f2014-03-03 17:23:12 +0100775 case htons(ETH_P_MPLS_UC):
776 case htons(ETH_P_MPLS_MC): {
777 struct mpls_label mpls_tmp, *mpls;
778
779 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
780 sizeof(*mpls), &mpls_tmp);
781 if (!mpls)
782 return 0;
783
784 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
785 >> MPLS_LS_TC_SHIFT;
786 }
787 case htons(ETH_P_80221):
788 /* 802.21 is always network control traffic */
789 return 7;
Zhu Yie31a16d2009-05-21 21:47:03 +0800790 default:
791 return 0;
792 }
793
Kyeyoon Parkfa9ffc72013-12-16 23:01:30 -0800794 if (qos_map) {
795 unsigned int i, tmp_dscp = dscp >> 2;
796
797 for (i = 0; i < qos_map->num_des; i++) {
798 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
799 return qos_map->dscp_exception[i].up;
800 }
801
802 for (i = 0; i < 8; i++) {
803 if (tmp_dscp >= qos_map->up[i].low &&
804 tmp_dscp <= qos_map->up[i].high)
805 return i;
806 }
807 }
808
Zhu Yie31a16d2009-05-21 21:47:03 +0800809 return dscp >> 5;
810}
811EXPORT_SYMBOL(cfg80211_classify8021d);
Johannes Berg517357c2009-07-02 17:18:40 +0200812
813const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
814{
Johannes Berg9caf0362012-11-29 01:25:20 +0100815 const struct cfg80211_bss_ies *ies;
816
817 ies = rcu_dereference(bss->ies);
818 if (!ies)
Johannes Berg517357c2009-07-02 17:18:40 +0200819 return NULL;
Johannes Berg9caf0362012-11-29 01:25:20 +0100820
821 return cfg80211_find_ie(ie, ies->data, ies->len);
Johannes Berg517357c2009-07-02 17:18:40 +0200822}
823EXPORT_SYMBOL(ieee80211_bss_get_ie);
Johannes Bergfffd0932009-07-08 14:22:54 +0200824
825void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
826{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800827 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
Johannes Bergfffd0932009-07-08 14:22:54 +0200828 struct net_device *dev = wdev->netdev;
829 int i;
830
831 if (!wdev->connect_keys)
832 return;
833
834 for (i = 0; i < 6; i++) {
835 if (!wdev->connect_keys->params[i].cipher)
836 continue;
Hila Gonene35e4d22012-06-27 17:19:42 +0300837 if (rdev_add_key(rdev, dev, i, false, NULL,
838 &wdev->connect_keys->params[i])) {
Joe Perchese9c02682010-11-16 19:56:49 -0800839 netdev_err(dev, "failed to set key %d\n", i);
Zhu Yi1e056662009-07-20 16:12:57 +0800840 continue;
841 }
Johannes Bergfffd0932009-07-08 14:22:54 +0200842 if (wdev->connect_keys->def == i)
Hila Gonene35e4d22012-06-27 17:19:42 +0300843 if (rdev_set_default_key(rdev, dev, i, true, true)) {
Joe Perchese9c02682010-11-16 19:56:49 -0800844 netdev_err(dev, "failed to set defkey %d\n", i);
Zhu Yi1e056662009-07-20 16:12:57 +0800845 continue;
846 }
Johannes Bergfffd0932009-07-08 14:22:54 +0200847 if (wdev->connect_keys->defmgmt == i)
Hila Gonene35e4d22012-06-27 17:19:42 +0300848 if (rdev_set_default_mgmt_key(rdev, dev, i))
Joe Perchese9c02682010-11-16 19:56:49 -0800849 netdev_err(dev, "failed to set mgtdef %d\n", i);
Johannes Bergfffd0932009-07-08 14:22:54 +0200850 }
851
Johannes Bergb47f6102014-09-10 13:39:54 +0300852 kzfree(wdev->connect_keys);
Johannes Bergfffd0932009-07-08 14:22:54 +0200853 wdev->connect_keys = NULL;
854}
Johannes Berg3d54d252009-08-21 14:51:05 +0200855
Daniel Drake1f6fc432012-08-02 18:41:48 +0100856void cfg80211_process_wdev_events(struct wireless_dev *wdev)
Johannes Berg3d54d252009-08-21 14:51:05 +0200857{
858 struct cfg80211_event *ev;
859 unsigned long flags;
860 const u8 *bssid = NULL;
861
862 spin_lock_irqsave(&wdev->event_lock, flags);
863 while (!list_empty(&wdev->event_list)) {
864 ev = list_first_entry(&wdev->event_list,
865 struct cfg80211_event, list);
866 list_del(&ev->list);
867 spin_unlock_irqrestore(&wdev->event_lock, flags);
868
869 wdev_lock(wdev);
870 switch (ev->type) {
871 case EVENT_CONNECT_RESULT:
872 if (!is_zero_ether_addr(ev->cr.bssid))
873 bssid = ev->cr.bssid;
874 __cfg80211_connect_result(
875 wdev->netdev, bssid,
876 ev->cr.req_ie, ev->cr.req_ie_len,
877 ev->cr.resp_ie, ev->cr.resp_ie_len,
878 ev->cr.status,
879 ev->cr.status == WLAN_STATUS_SUCCESS,
880 NULL);
881 break;
882 case EVENT_ROAMED:
Vasanthakumar Thiagarajanadbde342011-12-08 14:28:47 +0530883 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
884 ev->rm.req_ie_len, ev->rm.resp_ie,
885 ev->rm.resp_ie_len);
Johannes Berg3d54d252009-08-21 14:51:05 +0200886 break;
887 case EVENT_DISCONNECTED:
888 __cfg80211_disconnected(wdev->netdev,
889 ev->dc.ie, ev->dc.ie_len,
890 ev->dc.reason, true);
891 break;
892 case EVENT_IBSS_JOINED:
Antonio Quartullife94f3a2014-01-29 17:53:43 +0100893 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
894 ev->ij.channel);
Johannes Berg3d54d252009-08-21 14:51:05 +0200895 break;
Michal Kaziorf04c2202014-04-09 15:11:01 +0200896 case EVENT_STOPPED:
897 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
898 break;
Johannes Berg3d54d252009-08-21 14:51:05 +0200899 }
900 wdev_unlock(wdev);
901
902 kfree(ev);
903
904 spin_lock_irqsave(&wdev->event_lock, flags);
905 }
906 spin_unlock_irqrestore(&wdev->event_lock, flags);
907}
908
909void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
910{
911 struct wireless_dev *wdev;
912
913 ASSERT_RTNL();
Johannes Berg3d54d252009-08-21 14:51:05 +0200914
Johannes Berg89a54e42012-06-15 14:33:17 +0200915 list_for_each_entry(wdev, &rdev->wdev_list, list)
Johannes Berg3d54d252009-08-21 14:51:05 +0200916 cfg80211_process_wdev_events(wdev);
Johannes Berg3d54d252009-08-21 14:51:05 +0200917}
918
919int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
920 struct net_device *dev, enum nl80211_iftype ntype,
921 u32 *flags, struct vif_params *params)
922{
923 int err;
924 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
925
Zhao, Gang73fb08e2014-03-19 17:04:36 +0800926 ASSERT_RTNL();
Johannes Berg3d54d252009-08-21 14:51:05 +0200927
928 /* don't support changing VLANs, you just re-create them */
929 if (otype == NL80211_IFTYPE_AP_VLAN)
930 return -EOPNOTSUPP;
931
Johannes Berg98104fde2012-06-16 00:19:54 +0200932 /* cannot change into P2P device type */
933 if (ntype == NL80211_IFTYPE_P2P_DEVICE)
934 return -EOPNOTSUPP;
935
Johannes Berg3d54d252009-08-21 14:51:05 +0200936 if (!rdev->ops->change_virtual_intf ||
937 !(rdev->wiphy.interface_modes & (1 << ntype)))
938 return -EOPNOTSUPP;
939
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100940 /* if it's part of a bridge, reject changing type to station/ibss */
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000941 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
Johannes Berg074ac8d2010-09-16 14:58:22 +0200942 (ntype == NL80211_IFTYPE_ADHOC ||
943 ntype == NL80211_IFTYPE_STATION ||
944 ntype == NL80211_IFTYPE_P2P_CLIENT))
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100945 return -EBUSY;
946
Michal Kaziorf8cdddb2012-06-08 10:55:44 +0200947 if (ntype != otype && netif_running(dev)) {
Johannes Berg9bc383d2009-11-19 11:55:19 +0100948 dev->ieee80211_ptr->use_4addr = false;
Johannes Berg29cbe682010-12-03 09:20:44 +0100949 dev->ieee80211_ptr->mesh_id_up_len = 0;
Johannes Berg194ff522013-12-30 23:12:37 +0100950 wdev_lock(dev->ieee80211_ptr);
Kyeyoon Parkfa9ffc72013-12-16 23:01:30 -0800951 rdev_set_qos_map(rdev, dev, NULL);
Johannes Berg194ff522013-12-30 23:12:37 +0100952 wdev_unlock(dev->ieee80211_ptr);
Johannes Berg9bc383d2009-11-19 11:55:19 +0100953
Johannes Berg3d54d252009-08-21 14:51:05 +0200954 switch (otype) {
Michal Kaziorac800142012-06-29 12:46:57 +0200955 case NL80211_IFTYPE_AP:
Ilan Peer7c8d5e02014-02-25 15:33:38 +0200956 cfg80211_stop_ap(rdev, dev, true);
Michal Kaziorac800142012-06-29 12:46:57 +0200957 break;
Johannes Berg3d54d252009-08-21 14:51:05 +0200958 case NL80211_IFTYPE_ADHOC:
959 cfg80211_leave_ibss(rdev, dev, false);
960 break;
961 case NL80211_IFTYPE_STATION:
Johannes Berg074ac8d2010-09-16 14:58:22 +0200962 case NL80211_IFTYPE_P2P_CLIENT:
Johannes Berg83739b02013-05-15 17:44:01 +0200963 wdev_lock(dev->ieee80211_ptr);
Johannes Berg3d54d252009-08-21 14:51:05 +0200964 cfg80211_disconnect(rdev, dev,
965 WLAN_REASON_DEAUTH_LEAVING, true);
Johannes Berg83739b02013-05-15 17:44:01 +0200966 wdev_unlock(dev->ieee80211_ptr);
Johannes Berg3d54d252009-08-21 14:51:05 +0200967 break;
968 case NL80211_IFTYPE_MESH_POINT:
969 /* mesh should be handled? */
970 break;
971 default:
972 break;
973 }
974
975 cfg80211_process_rdev_events(rdev);
976 }
977
Hila Gonene35e4d22012-06-27 17:19:42 +0300978 err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params);
Johannes Berg3d54d252009-08-21 14:51:05 +0200979
980 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
981
Johannes Berg9bc383d2009-11-19 11:55:19 +0100982 if (!err && params && params->use_4addr != -1)
983 dev->ieee80211_ptr->use_4addr = params->use_4addr;
984
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100985 if (!err) {
986 dev->priv_flags &= ~IFF_DONT_BRIDGE;
987 switch (ntype) {
988 case NL80211_IFTYPE_STATION:
989 if (dev->ieee80211_ptr->use_4addr)
990 break;
991 /* fall through */
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100992 case NL80211_IFTYPE_OCB:
Johannes Berg074ac8d2010-09-16 14:58:22 +0200993 case NL80211_IFTYPE_P2P_CLIENT:
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100994 case NL80211_IFTYPE_ADHOC:
995 dev->priv_flags |= IFF_DONT_BRIDGE;
996 break;
Johannes Berg074ac8d2010-09-16 14:58:22 +0200997 case NL80211_IFTYPE_P2P_GO:
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100998 case NL80211_IFTYPE_AP:
999 case NL80211_IFTYPE_AP_VLAN:
1000 case NL80211_IFTYPE_WDS:
1001 case NL80211_IFTYPE_MESH_POINT:
1002 /* bridging OK */
1003 break;
1004 case NL80211_IFTYPE_MONITOR:
1005 /* monitor can't bridge anyway */
1006 break;
1007 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001008 case NUM_NL80211_IFTYPES:
Johannes Bergad4bb6f2009-11-19 00:56:30 +01001009 /* not happening */
1010 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001011 case NL80211_IFTYPE_P2P_DEVICE:
1012 WARN_ON(1);
1013 break;
Johannes Bergad4bb6f2009-11-19 00:56:30 +01001014 }
1015 }
1016
Michal Kaziordbbae262012-06-29 12:47:01 +02001017 if (!err && ntype != otype && netif_running(dev)) {
1018 cfg80211_update_iface_num(rdev, ntype, 1);
1019 cfg80211_update_iface_num(rdev, otype, -1);
1020 }
1021
Johannes Berg3d54d252009-08-21 14:51:05 +02001022 return err;
1023}
John W. Linville254416a2009-12-09 16:43:52 -05001024
Vladimir Kondratiev95ddc1f2012-07-05 14:25:50 +03001025static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1026{
1027 static const u32 __mcs2bitrate[] = {
1028 /* control PHY */
1029 [0] = 275,
1030 /* SC PHY */
1031 [1] = 3850,
1032 [2] = 7700,
1033 [3] = 9625,
1034 [4] = 11550,
1035 [5] = 12512, /* 1251.25 mbps */
1036 [6] = 15400,
1037 [7] = 19250,
1038 [8] = 23100,
1039 [9] = 25025,
1040 [10] = 30800,
1041 [11] = 38500,
1042 [12] = 46200,
1043 /* OFDM PHY */
1044 [13] = 6930,
1045 [14] = 8662, /* 866.25 mbps */
1046 [15] = 13860,
1047 [16] = 17325,
1048 [17] = 20790,
1049 [18] = 27720,
1050 [19] = 34650,
1051 [20] = 41580,
1052 [21] = 45045,
1053 [22] = 51975,
1054 [23] = 62370,
1055 [24] = 67568, /* 6756.75 mbps */
1056 /* LP-SC PHY */
1057 [25] = 6260,
1058 [26] = 8340,
1059 [27] = 11120,
1060 [28] = 12510,
1061 [29] = 16680,
1062 [30] = 22240,
1063 [31] = 25030,
1064 };
1065
1066 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1067 return 0;
1068
1069 return __mcs2bitrate[rate->mcs];
1070}
1071
Johannes Bergdb9c64c2012-11-09 14:56:41 +01001072static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1073{
1074 static const u32 base[4][10] = {
1075 { 6500000,
1076 13000000,
1077 19500000,
1078 26000000,
1079 39000000,
1080 52000000,
1081 58500000,
1082 65000000,
1083 78000000,
1084 0,
1085 },
1086 { 13500000,
1087 27000000,
1088 40500000,
1089 54000000,
1090 81000000,
1091 108000000,
1092 121500000,
1093 135000000,
1094 162000000,
1095 180000000,
1096 },
1097 { 29300000,
1098 58500000,
1099 87800000,
1100 117000000,
1101 175500000,
1102 234000000,
1103 263300000,
1104 292500000,
1105 351000000,
1106 390000000,
1107 },
1108 { 58500000,
1109 117000000,
1110 175500000,
1111 234000000,
1112 351000000,
1113 468000000,
1114 526500000,
1115 585000000,
1116 702000000,
1117 780000000,
1118 },
1119 };
1120 u32 bitrate;
1121 int idx;
1122
1123 if (WARN_ON_ONCE(rate->mcs > 9))
1124 return 0;
1125
Johannes Bergb51f3be2015-01-15 16:14:02 +01001126 switch (rate->bw) {
1127 case RATE_INFO_BW_160:
1128 idx = 3;
1129 break;
1130 case RATE_INFO_BW_80:
1131 idx = 2;
1132 break;
1133 case RATE_INFO_BW_40:
1134 idx = 1;
1135 break;
1136 case RATE_INFO_BW_5:
1137 case RATE_INFO_BW_10:
1138 default:
1139 WARN_ON(1);
1140 /* fall through */
1141 case RATE_INFO_BW_20:
1142 idx = 0;
1143 }
Johannes Bergdb9c64c2012-11-09 14:56:41 +01001144
1145 bitrate = base[idx][rate->mcs];
1146 bitrate *= rate->nss;
1147
1148 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1149 bitrate = (bitrate / 9) * 10;
1150
1151 /* do NOT round down here */
1152 return (bitrate + 50000) / 100000;
1153}
1154
Vladimir Kondratiev8eb41c82012-07-05 14:25:49 +03001155u32 cfg80211_calculate_bitrate(struct rate_info *rate)
John W. Linville254416a2009-12-09 16:43:52 -05001156{
1157 int modulation, streams, bitrate;
1158
Johannes Bergdb9c64c2012-11-09 14:56:41 +01001159 if (!(rate->flags & RATE_INFO_FLAGS_MCS) &&
1160 !(rate->flags & RATE_INFO_FLAGS_VHT_MCS))
John W. Linville254416a2009-12-09 16:43:52 -05001161 return rate->legacy;
Vladimir Kondratiev95ddc1f2012-07-05 14:25:50 +03001162 if (rate->flags & RATE_INFO_FLAGS_60G)
1163 return cfg80211_calculate_bitrate_60g(rate);
Johannes Bergdb9c64c2012-11-09 14:56:41 +01001164 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1165 return cfg80211_calculate_bitrate_vht(rate);
John W. Linville254416a2009-12-09 16:43:52 -05001166
1167 /* the formula below does only work for MCS values smaller than 32 */
Johannes Berg2615f372012-05-08 21:36:20 +02001168 if (WARN_ON_ONCE(rate->mcs >= 32))
John W. Linville254416a2009-12-09 16:43:52 -05001169 return 0;
1170
1171 modulation = rate->mcs & 7;
1172 streams = (rate->mcs >> 3) + 1;
1173
Johannes Bergb51f3be2015-01-15 16:14:02 +01001174 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
John W. Linville254416a2009-12-09 16:43:52 -05001175
1176 if (modulation < 4)
1177 bitrate *= (modulation + 1);
1178 else if (modulation == 4)
1179 bitrate *= (modulation + 2);
1180 else
1181 bitrate *= (modulation + 3);
1182
1183 bitrate *= streams;
1184
1185 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1186 bitrate = (bitrate / 9) * 10;
1187
1188 /* do NOT round down here */
1189 return (bitrate + 50000) / 100000;
1190}
Thomas Pedersen8097e142012-03-05 15:31:47 -08001191EXPORT_SYMBOL(cfg80211_calculate_bitrate);
Johannes Berg56d18932011-05-09 18:41:15 +02001192
Arend van Sprielc216e642012-11-25 19:13:28 +01001193int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1194 enum ieee80211_p2p_attr_id attr,
1195 u8 *buf, unsigned int bufsize)
Johannes Berg0ee45352012-10-29 19:48:40 +01001196{
1197 u8 *out = buf;
1198 u16 attr_remaining = 0;
1199 bool desired_attr = false;
1200 u16 desired_len = 0;
1201
1202 while (len > 0) {
1203 unsigned int iedatalen;
1204 unsigned int copy;
1205 const u8 *iedata;
1206
1207 if (len < 2)
1208 return -EILSEQ;
1209 iedatalen = ies[1];
1210 if (iedatalen + 2 > len)
1211 return -EILSEQ;
1212
1213 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1214 goto cont;
1215
1216 if (iedatalen < 4)
1217 goto cont;
1218
1219 iedata = ies + 2;
1220
1221 /* check WFA OUI, P2P subtype */
1222 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1223 iedata[2] != 0x9a || iedata[3] != 0x09)
1224 goto cont;
1225
1226 iedatalen -= 4;
1227 iedata += 4;
1228
1229 /* check attribute continuation into this IE */
1230 copy = min_t(unsigned int, attr_remaining, iedatalen);
1231 if (copy && desired_attr) {
1232 desired_len += copy;
1233 if (out) {
1234 memcpy(out, iedata, min(bufsize, copy));
1235 out += min(bufsize, copy);
1236 bufsize -= min(bufsize, copy);
1237 }
1238
1239
1240 if (copy == attr_remaining)
1241 return desired_len;
1242 }
1243
1244 attr_remaining -= copy;
1245 if (attr_remaining)
1246 goto cont;
1247
1248 iedatalen -= copy;
1249 iedata += copy;
1250
1251 while (iedatalen > 0) {
1252 u16 attr_len;
1253
1254 /* P2P attribute ID & size must fit */
1255 if (iedatalen < 3)
1256 return -EILSEQ;
1257 desired_attr = iedata[0] == attr;
1258 attr_len = get_unaligned_le16(iedata + 1);
1259 iedatalen -= 3;
1260 iedata += 3;
1261
1262 copy = min_t(unsigned int, attr_len, iedatalen);
1263
1264 if (desired_attr) {
1265 desired_len += copy;
1266 if (out) {
1267 memcpy(out, iedata, min(bufsize, copy));
1268 out += min(bufsize, copy);
1269 bufsize -= min(bufsize, copy);
1270 }
1271
1272 if (copy == attr_len)
1273 return desired_len;
1274 }
1275
1276 iedata += copy;
1277 iedatalen -= copy;
1278 attr_remaining = attr_len - copy;
1279 }
1280
1281 cont:
1282 len -= ies[1] + 2;
1283 ies += ies[1] + 2;
1284 }
1285
1286 if (attr_remaining && desired_attr)
1287 return -EILSEQ;
1288
1289 return -ENOENT;
1290}
1291EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1292
Johannes Berg1ce3e822012-08-01 17:00:55 +02001293bool ieee80211_operating_class_to_band(u8 operating_class,
1294 enum ieee80211_band *band)
1295{
1296 switch (operating_class) {
1297 case 112:
1298 case 115 ... 127:
1299 *band = IEEE80211_BAND_5GHZ;
1300 return true;
1301 case 81:
1302 case 82:
1303 case 83:
1304 case 84:
1305 *band = IEEE80211_BAND_2GHZ;
1306 return true;
Vladimir Kondratiev55300a12013-04-23 09:54:21 +03001307 case 180:
1308 *band = IEEE80211_BAND_60GHZ;
1309 return true;
Johannes Berg1ce3e822012-08-01 17:00:55 +02001310 }
1311
1312 return false;
1313}
1314EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1315
Johannes Berg56d18932011-05-09 18:41:15 +02001316int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1317 u32 beacon_int)
1318{
1319 struct wireless_dev *wdev;
1320 int res = 0;
1321
1322 if (!beacon_int)
1323 return -EINVAL;
1324
Johannes Berg89a54e42012-06-15 14:33:17 +02001325 list_for_each_entry(wdev, &rdev->wdev_list, list) {
Johannes Berg56d18932011-05-09 18:41:15 +02001326 if (!wdev->beacon_interval)
1327 continue;
1328 if (wdev->beacon_interval != beacon_int) {
1329 res = -EINVAL;
1330 break;
1331 }
1332 }
1333
Johannes Berg56d18932011-05-09 18:41:15 +02001334 return res;
1335}
Johannes Berg7527a782011-05-13 10:58:57 +02001336
Michal Kazior65a124d2014-04-09 15:29:22 +02001337int cfg80211_iter_combinations(struct wiphy *wiphy,
1338 const int num_different_channels,
1339 const u8 radar_detect,
1340 const int iftype_num[NUM_NL80211_IFTYPES],
1341 void (*iter)(const struct ieee80211_iface_combination *c,
1342 void *data),
1343 void *data)
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001344{
Felix Fietkau8c48b502014-05-05 11:48:40 +02001345 const struct ieee80211_regdomain *regdom;
1346 enum nl80211_dfs_regions region = 0;
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001347 int i, j, iftype;
1348 int num_interfaces = 0;
1349 u32 used_iftypes = 0;
1350
Felix Fietkau8c48b502014-05-05 11:48:40 +02001351 if (radar_detect) {
1352 rcu_read_lock();
1353 regdom = rcu_dereference(cfg80211_regdomain);
1354 if (regdom)
1355 region = regdom->dfs_region;
1356 rcu_read_unlock();
1357 }
1358
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001359 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1360 num_interfaces += iftype_num[iftype];
1361 if (iftype_num[iftype] > 0 &&
1362 !(wiphy->software_iftypes & BIT(iftype)))
1363 used_iftypes |= BIT(iftype);
1364 }
1365
1366 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1367 const struct ieee80211_iface_combination *c;
1368 struct ieee80211_iface_limit *limits;
1369 u32 all_iftypes = 0;
1370
1371 c = &wiphy->iface_combinations[i];
1372
1373 if (num_interfaces > c->max_interfaces)
1374 continue;
1375 if (num_different_channels > c->num_different_channels)
1376 continue;
1377
1378 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1379 GFP_KERNEL);
1380 if (!limits)
1381 return -ENOMEM;
1382
1383 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1384 if (wiphy->software_iftypes & BIT(iftype))
1385 continue;
1386 for (j = 0; j < c->n_limits; j++) {
1387 all_iftypes |= limits[j].types;
1388 if (!(limits[j].types & BIT(iftype)))
1389 continue;
1390 if (limits[j].max < iftype_num[iftype])
1391 goto cont;
1392 limits[j].max -= iftype_num[iftype];
1393 }
1394 }
1395
Michal Kazior65d26f22014-03-21 14:52:15 +01001396 if (radar_detect != (c->radar_detect_widths & radar_detect))
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001397 goto cont;
1398
Felix Fietkau8c48b502014-05-05 11:48:40 +02001399 if (radar_detect && c->radar_detect_regions &&
1400 !(c->radar_detect_regions & BIT(region)))
1401 goto cont;
1402
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001403 /* Finally check that all iftypes that we're currently
1404 * using are actually part of this combination. If they
1405 * aren't then we can't use this combination and have
1406 * to continue to the next.
1407 */
1408 if ((all_iftypes & used_iftypes) != used_iftypes)
1409 goto cont;
1410
1411 /* This combination covered all interface types and
1412 * supported the requested numbers, so we're good.
1413 */
Michal Kazior65a124d2014-04-09 15:29:22 +02001414
1415 (*iter)(c, data);
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001416 cont:
1417 kfree(limits);
1418 }
1419
Michal Kazior65a124d2014-04-09 15:29:22 +02001420 return 0;
1421}
1422EXPORT_SYMBOL(cfg80211_iter_combinations);
1423
1424static void
1425cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1426 void *data)
1427{
1428 int *num = data;
1429 (*num)++;
1430}
1431
1432int cfg80211_check_combinations(struct wiphy *wiphy,
1433 const int num_different_channels,
1434 const u8 radar_detect,
1435 const int iftype_num[NUM_NL80211_IFTYPES])
1436{
1437 int err, num = 0;
1438
1439 err = cfg80211_iter_combinations(wiphy, num_different_channels,
1440 radar_detect, iftype_num,
1441 cfg80211_iter_sum_ifcombs, &num);
1442 if (err)
1443 return err;
1444 if (num == 0)
1445 return -EBUSY;
1446
1447 return 0;
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001448}
1449EXPORT_SYMBOL(cfg80211_check_combinations);
1450
Michal Kaziord4e50c52012-06-29 12:47:07 +02001451int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
1452 struct wireless_dev *wdev,
1453 enum nl80211_iftype iftype,
1454 struct ieee80211_channel *chan,
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001455 enum cfg80211_chan_mode chanmode,
1456 u8 radar_detect)
Johannes Berg7527a782011-05-13 10:58:57 +02001457{
1458 struct wireless_dev *wdev_iter;
1459 int num[NUM_NL80211_IFTYPES];
Michal Kaziord4e50c52012-06-29 12:47:07 +02001460 struct ieee80211_channel
1461 *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS];
1462 struct ieee80211_channel *ch;
1463 enum cfg80211_chan_mode chmode;
1464 int num_different_channels = 0;
Johannes Berg7527a782011-05-13 10:58:57 +02001465 int total = 1;
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001466 int i;
Johannes Berg7527a782011-05-13 10:58:57 +02001467
1468 ASSERT_RTNL();
1469
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001470 if (WARN_ON(hweight32(radar_detect) > 1))
1471 return -EINVAL;
1472
Luciano Coelho7b2106a2014-02-20 16:36:21 +02001473 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001474 return -EINVAL;
1475
Johannes Berg7527a782011-05-13 10:58:57 +02001476 /* Always allow software iftypes */
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001477 if (rdev->wiphy.software_iftypes & BIT(iftype)) {
1478 if (radar_detect)
1479 return -EINVAL;
Johannes Berg7527a782011-05-13 10:58:57 +02001480 return 0;
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001481 }
Johannes Berg7527a782011-05-13 10:58:57 +02001482
Johannes Berg7527a782011-05-13 10:58:57 +02001483 memset(num, 0, sizeof(num));
Michal Kaziord4e50c52012-06-29 12:47:07 +02001484 memset(used_channels, 0, sizeof(used_channels));
Johannes Berg7527a782011-05-13 10:58:57 +02001485
1486 num[iftype] = 1;
1487
Luciano Coelho73de86a2014-02-13 11:31:59 +02001488 /* TODO: We'll probably not need this anymore, since this
1489 * should only be called with CHAN_MODE_UNDEFINED. There are
1490 * still a couple of pending calls where other chanmodes are
1491 * used, but we should get rid of them.
1492 */
Michal Kaziord4e50c52012-06-29 12:47:07 +02001493 switch (chanmode) {
1494 case CHAN_MODE_UNDEFINED:
1495 break;
1496 case CHAN_MODE_SHARED:
1497 WARN_ON(!chan);
1498 used_channels[0] = chan;
1499 num_different_channels++;
1500 break;
1501 case CHAN_MODE_EXCLUSIVE:
1502 num_different_channels++;
1503 break;
1504 }
1505
Johannes Berg89a54e42012-06-15 14:33:17 +02001506 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
Johannes Berg7527a782011-05-13 10:58:57 +02001507 if (wdev_iter == wdev)
1508 continue;
Johannes Berg6e3ab552013-04-19 12:19:39 +02001509 if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
Johannes Berg98104fde2012-06-16 00:19:54 +02001510 if (!wdev_iter->p2p_started)
1511 continue;
Johannes Berg6e3ab552013-04-19 12:19:39 +02001512 } else if (wdev_iter->netdev) {
1513 if (!netif_running(wdev_iter->netdev))
1514 continue;
Johannes Berg98104fde2012-06-16 00:19:54 +02001515 } else {
1516 WARN_ON(1);
1517 }
Johannes Berg7527a782011-05-13 10:58:57 +02001518
1519 if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
1520 continue;
1521
Johannes Berg8e95ea42012-07-10 19:39:02 +02001522 /*
1523 * We may be holding the "wdev" mutex, but now need to lock
1524 * wdev_iter. This is OK because once we get here wdev_iter
1525 * is not wdev (tested above), but we need to use the nested
1526 * locking for lockdep.
1527 */
1528 mutex_lock_nested(&wdev_iter->mtx, 1);
1529 __acquire(wdev_iter->mtx);
Michal Kazior9e0e2962014-01-29 14:22:27 +01001530 cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect);
Johannes Berg8e95ea42012-07-10 19:39:02 +02001531 wdev_unlock(wdev_iter);
Michal Kaziord4e50c52012-06-29 12:47:07 +02001532
1533 switch (chmode) {
1534 case CHAN_MODE_UNDEFINED:
1535 break;
1536 case CHAN_MODE_SHARED:
1537 for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++)
1538 if (!used_channels[i] || used_channels[i] == ch)
1539 break;
1540
Michal Kaziore4e32452012-06-29 12:47:08 +02001541 if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS)
Michal Kaziord4e50c52012-06-29 12:47:07 +02001542 return -EBUSY;
Michal Kaziord4e50c52012-06-29 12:47:07 +02001543
1544 if (used_channels[i] == NULL) {
1545 used_channels[i] = ch;
1546 num_different_channels++;
1547 }
1548 break;
1549 case CHAN_MODE_EXCLUSIVE:
1550 num_different_channels++;
1551 break;
1552 }
1553
Johannes Berg7527a782011-05-13 10:58:57 +02001554 num[wdev_iter->iftype]++;
1555 total++;
1556 }
Johannes Berg7527a782011-05-13 10:58:57 +02001557
Simon Wunderlich11c4a072013-01-08 14:04:07 +01001558 if (total == 1 && !radar_detect)
Johannes Berg8e8b41f2012-03-15 10:16:16 +01001559 return 0;
1560
Luciano Coelhocb2d9562014-02-17 16:52:35 +02001561 return cfg80211_check_combinations(&rdev->wiphy, num_different_channels,
1562 radar_detect, num);
Johannes Berg7527a782011-05-13 10:58:57 +02001563}
Johannes Berg34850ab2011-07-18 18:08:35 +02001564
1565int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1566 const u8 *rates, unsigned int n_rates,
1567 u32 *mask)
1568{
1569 int i, j;
1570
Johannes Berga401d2b2011-07-20 00:52:16 +02001571 if (!sband)
1572 return -EINVAL;
1573
Johannes Berg34850ab2011-07-18 18:08:35 +02001574 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1575 return -EINVAL;
1576
1577 *mask = 0;
1578
1579 for (i = 0; i < n_rates; i++) {
1580 int rate = (rates[i] & 0x7f) * 5;
1581 bool found = false;
1582
1583 for (j = 0; j < sband->n_bitrates; j++) {
1584 if (sband->bitrates[j].bitrate == rate) {
1585 found = true;
1586 *mask |= BIT(j);
1587 break;
1588 }
1589 }
1590 if (!found)
1591 return -EINVAL;
1592 }
1593
1594 /*
1595 * mask must have at least one bit set here since we
1596 * didn't accept a 0-length rates array nor allowed
1597 * entries in the array that didn't exist
1598 */
1599
1600 return 0;
1601}
Johannes Berg11a2a352011-11-21 11:09:22 +01001602
Ilan Peerbdfbec22014-01-09 11:37:23 +02001603unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1604{
1605 enum ieee80211_band band;
1606 unsigned int n_channels = 0;
1607
1608 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1609 if (wiphy->bands[band])
1610 n_channels += wiphy->bands[band]->n_channels;
1611
1612 return n_channels;
1613}
1614EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1615
Antonio Quartulli74063532014-05-19 21:53:21 +02001616int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1617 struct station_info *sinfo)
1618{
1619 struct cfg80211_registered_device *rdev;
1620 struct wireless_dev *wdev;
1621
1622 wdev = dev->ieee80211_ptr;
1623 if (!wdev)
1624 return -EOPNOTSUPP;
1625
1626 rdev = wiphy_to_rdev(wdev->wiphy);
1627 if (!rdev->ops->get_station)
1628 return -EOPNOTSUPP;
1629
1630 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1631}
1632EXPORT_SYMBOL(cfg80211_get_station);
1633
Johannes Berg11a2a352011-11-21 11:09:22 +01001634/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1635/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1636const unsigned char rfc1042_header[] __aligned(2) =
1637 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1638EXPORT_SYMBOL(rfc1042_header);
1639
1640/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1641const unsigned char bridge_tunnel_header[] __aligned(2) =
1642 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1643EXPORT_SYMBOL(bridge_tunnel_header);