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cfg80211: add more flexible BSS lookup
[mirror_ubuntu-zesty-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82
JB		 17#include <linux/if_arp.h>
18#include <linux/wireless.h>
19#include <linux/random.h>
20#include <linux/etherdevice.h>
d0709a65 21#include <linux/rtnetlink.h>
f0706e82 22#include <net/iw_handler.h>
f0706e82 23#include <net/mac80211.h>
472dbc45 24#include <asm/unaligned.h>
60f8b39c 25
f0706e82 26#include "ieee80211_i.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82 29
6042a3e3 30#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 31#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32#define IEEE80211_AUTH_MAX_TRIES 3
33#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34#define IEEE80211_ASSOC_MAX_TRIES 3
35#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36#define IEEE80211_PROBE_INTERVAL (60 * HZ)
37#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38#define IEEE80211_SCAN_INTERVAL (2 * HZ)
39#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
872ba533 40#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 41
f0706e82
JB		 42#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
44
45#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
46
47
5484e237
JB		 48/* utils */
49static int ecw2cw(int ecw)
60f8b39c 50{
5484e237 51 return (1 << ecw) - 1;
60f8b39c
JB		 52}
53
c2b13452 54static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
43ac2ca3
JM		 55{
56 u8 *end, *pos;
57
58 pos = bss->ies;
59 if (pos == NULL)
60 return NULL;
61 end = pos + bss->ies_len;
62
63 while (pos + 1 < end) {
64 if (pos + 2 + pos[1] > end)
65 break;
66 if (pos[0] == ie)
67 return pos;
68 pos += 2 + pos[1];
69 }
70
71 return NULL;
72}
73
c2b13452 74static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 75 struct ieee80211_supported_band *sband,
881d948c 76 u32 *rates)
9ac19a90
JB		 77{
78 int i, j, count;
79 *rates = 0;
80 count = 0;
81 for (i = 0; i < bss->supp_rates_len; i++) {
82 int rate = (bss->supp_rates[i] & 0x7F) * 5;
83
84 for (j = 0; j < sband->n_bitrates; j++)
85 if (sband->bitrates[j].bitrate == rate) {
86 *rates |= BIT(j);
87 count++;
88 break;
89 }
90 }
91
92 return count;
93}
94
9c6bd790 95/* also used by mesh code */
881d948c 96u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
9c6bd790
JB		 97 struct ieee802_11_elems *elems,
98 enum ieee80211_band band)
60f8b39c 99{
9c6bd790
JB		 100 struct ieee80211_supported_band *sband;
101 struct ieee80211_rate *bitrates;
102 size_t num_rates;
881d948c 103 u32 supp_rates;
9c6bd790
JB		 104 int i, j;
105 sband = local->hw.wiphy->bands[band];
60f8b39c 106
9c6bd790
JB		 107 if (!sband) {
108 WARN_ON(1);
109 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
60f8b39c 110 }
60f8b39c 111
9c6bd790
JB		 112 bitrates = sband->bitrates;
113 num_rates = sband->n_bitrates;
114 supp_rates = 0;
115 for (i = 0; i < elems->supp_rates_len +
116 elems->ext_supp_rates_len; i++) {
117 u8 rate = 0;
118 int own_rate;
119 if (i < elems->supp_rates_len)
120 rate = elems->supp_rates[i];
121 else if (elems->ext_supp_rates)
122 rate = elems->ext_supp_rates
123 [i - elems->supp_rates_len];
124 own_rate = 5 * (rate & 0x7f);
125 for (j = 0; j < num_rates; j++)
126 if (bitrates[j].bitrate == own_rate)
127 supp_rates |= BIT(j);
128 }
129 return supp_rates;
60f8b39c
JB		 130}
131
9c6bd790
JB		 132/* frame sending functions */
133
9aed3cc1
JM		 134static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len)
135{
136 if (ies)
137 memcpy(skb_put(skb, ies_len), ies, ies_len);
138}
139
9c6bd790 140/* also used by scanning code */
0a51b27e
JB		 141void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
142 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 143{
144 struct ieee80211_local *local = sdata->local;
145 struct ieee80211_supported_band *sband;
146 struct sk_buff *skb;
147 struct ieee80211_mgmt *mgmt;
148 u8 *pos, *supp_rates, *esupp_rates = NULL;
149 int i;
150
9aed3cc1
JM		 151 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
152 sdata->u.sta.ie_probereq_len);
60f8b39c
JB		 153 if (!skb) {
154 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
155 "request\n", sdata->dev->name);
156 return;
157 }
158 skb_reserve(skb, local->hw.extra_tx_headroom);
159
160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
161 memset(mgmt, 0, 24);
162 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
163 IEEE80211_STYPE_PROBE_REQ);
164 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
165 if (dst) {
166 memcpy(mgmt->da, dst, ETH_ALEN);
167 memcpy(mgmt->bssid, dst, ETH_ALEN);
168 } else {
169 memset(mgmt->da, 0xff, ETH_ALEN);
170 memset(mgmt->bssid, 0xff, ETH_ALEN);
171 }
172 pos = skb_put(skb, 2 + ssid_len);
173 *pos++ = WLAN_EID_SSID;
174 *pos++ = ssid_len;
175 memcpy(pos, ssid, ssid_len);
176
177 supp_rates = skb_put(skb, 2);
178 supp_rates[0] = WLAN_EID_SUPP_RATES;
179 supp_rates[1] = 0;
180 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
181
182 for (i = 0; i < sband->n_bitrates; i++) {
183 struct ieee80211_rate *rate = &sband->bitrates[i];
184 if (esupp_rates) {
185 pos = skb_put(skb, 1);
186 esupp_rates[1]++;
187 } else if (supp_rates[1] == 8) {
188 esupp_rates = skb_put(skb, 3);
189 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
190 esupp_rates[1] = 1;
191 pos = &esupp_rates[2];
192 } else {
193 pos = skb_put(skb, 1);
194 supp_rates[1]++;
195 }
196 *pos = rate->bitrate / 5;
197 }
198
9aed3cc1
JM		 199 add_extra_ies(skb, sdata->u.sta.ie_probereq,
200 sdata->u.sta.ie_probereq_len);
201
e50db65c 202 ieee80211_tx_skb(sdata, skb, 0);
60f8b39c
JB		 203}
204
9c6bd790
JB		 205static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
206 struct ieee80211_if_sta *ifsta,
207 int transaction, u8 *extra, size_t extra_len,
208 int encrypt)
209{
210 struct ieee80211_local *local = sdata->local;
211 struct sk_buff *skb;
212 struct ieee80211_mgmt *mgmt;
213
214 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
9aed3cc1
JM		 215 sizeof(*mgmt) + 6 + extra_len +
216 sdata->u.sta.ie_auth_len);
9c6bd790
JB		 217 if (!skb) {
218 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
219 "frame\n", sdata->dev->name);
220 return;
221 }
222 skb_reserve(skb, local->hw.extra_tx_headroom);
223
224 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
225 memset(mgmt, 0, 24 + 6);
226 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
227 IEEE80211_STYPE_AUTH);
228 if (encrypt)
229 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
230 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
231 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
232 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
233 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
234 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
235 ifsta->auth_transaction = transaction + 1;
236 mgmt->u.auth.status_code = cpu_to_le16(0);
237 if (extra)
238 memcpy(skb_put(skb, extra_len), extra, extra_len);
9aed3cc1 239 add_extra_ies(skb, sdata->u.sta.ie_auth, sdata->u.sta.ie_auth_len);
9c6bd790
JB		 240
241 ieee80211_tx_skb(sdata, skb, encrypt);
242}
243
9ac19a90
JB		 244static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
245 struct ieee80211_if_sta *ifsta)
246{
247 struct ieee80211_local *local = sdata->local;
248 struct sk_buff *skb;
249 struct ieee80211_mgmt *mgmt;
9aed3cc1 250 u8 *pos, *ies, *ht_ie, *e_ies;
9ac19a90
JB		 251 int i, len, count, rates_len, supp_rates_len;
252 u16 capab;
c2b13452 253 struct ieee80211_bss *bss;
9ac19a90
JB		 254 int wmm = 0;
255 struct ieee80211_supported_band *sband;
881d948c 256 u32 rates = 0;
9aed3cc1
JM		 257 size_t e_ies_len;
258
259 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
260 e_ies = sdata->u.sta.ie_reassocreq;
261 e_ies_len = sdata->u.sta.ie_reassocreq_len;
262 } else {
263 e_ies = sdata->u.sta.ie_assocreq;
264 e_ies_len = sdata->u.sta.ie_assocreq_len;
265 }
9ac19a90
JB		 266
267 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
268 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
9aed3cc1 269 ifsta->ssid_len + e_ies_len);
9ac19a90
JB		 270 if (!skb) {
271 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
272 "frame\n", sdata->dev->name);
273 return;
274 }
275 skb_reserve(skb, local->hw.extra_tx_headroom);
276
277 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
278
279 capab = ifsta->capab;
280
281 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
282 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
283 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
284 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
285 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
286 }
287
288 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
289 local->hw.conf.channel->center_freq,
290 ifsta->ssid, ifsta->ssid_len);
291 if (bss) {
292 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
293 capab |= WLAN_CAPABILITY_PRIVACY;
294 if (bss->wmm_used)
295 wmm = 1;
296
297 /* get all rates supported by the device and the AP as
298 * some APs don't like getting a superset of their rates
299 * in the association request (e.g. D-Link DAP 1353 in
300 * b-only mode) */
301 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
302
303 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
304 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
305 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
306
307 ieee80211_rx_bss_put(local, bss);
308 } else {
309 rates = ~0;
310 rates_len = sband->n_bitrates;
311 }
312
313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
314 memset(mgmt, 0, 24);
315 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
316 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
317 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
318
319 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
320 skb_put(skb, 10);
321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_REASSOC_REQ);
323 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
324 mgmt->u.reassoc_req.listen_interval =
325 cpu_to_le16(local->hw.conf.listen_interval);
326 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
327 ETH_ALEN);
328 } else {
329 skb_put(skb, 4);
330 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
331 IEEE80211_STYPE_ASSOC_REQ);
332 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 333 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 334 cpu_to_le16(local->hw.conf.listen_interval);
335 }
336
337 /* SSID */
338 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
339 *pos++ = WLAN_EID_SSID;
340 *pos++ = ifsta->ssid_len;
341 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
342
343 /* add all rates which were marked to be used above */
344 supp_rates_len = rates_len;
345 if (supp_rates_len > 8)
346 supp_rates_len = 8;
347
348 len = sband->n_bitrates;
349 pos = skb_put(skb, supp_rates_len + 2);
350 *pos++ = WLAN_EID_SUPP_RATES;
351 *pos++ = supp_rates_len;
352
353 count = 0;
354 for (i = 0; i < sband->n_bitrates; i++) {
355 if (BIT(i) & rates) {
356 int rate = sband->bitrates[i].bitrate;
357 *pos++ = (u8) (rate / 5);
358 if (++count == 8)
359 break;
360 }
361 }
362
363 if (rates_len > count) {
364 pos = skb_put(skb, rates_len - count + 2);
365 *pos++ = WLAN_EID_EXT_SUPP_RATES;
366 *pos++ = rates_len - count;
367
368 for (i++; i < sband->n_bitrates; i++) {
369 if (BIT(i) & rates) {
370 int rate = sband->bitrates[i].bitrate;
371 *pos++ = (u8) (rate / 5);
372 }
373 }
374 }
375
376 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
377 /* 1. power capabilities */
378 pos = skb_put(skb, 4);
379 *pos++ = WLAN_EID_PWR_CAPABILITY;
380 *pos++ = 2;
381 *pos++ = 0; /* min tx power */
382 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
383
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos = skb_put(skb, 2 * sband->n_channels + 2);
387 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
388 *pos++ = 2 * sband->n_channels;
389 for (i = 0; i < sband->n_channels; i++) {
390 *pos++ = ieee80211_frequency_to_channel(
391 sband->channels[i].center_freq);
392 *pos++ = 1; /* one channel in the subband*/
393 }
394 }
395
396 if (ifsta->extra_ie) {
397 pos = skb_put(skb, ifsta->extra_ie_len);
398 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
399 }
400
401 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
402 pos = skb_put(skb, 9);
403 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
404 *pos++ = 7; /* len */
405 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
406 *pos++ = 0x50;
407 *pos++ = 0xf2;
408 *pos++ = 2; /* WME */
409 *pos++ = 0; /* WME info */
410 *pos++ = 1; /* WME ver */
411 *pos++ = 0;
412 }
413
414 /* wmm support is a must to HT */
eb46936b
VT		 415 /*
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
420 */
9ac19a90 421 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de
JB		 422 sband->ht_cap.ht_supported &&
423 (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) &&
eb46936b
VT		 424 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
425 (!(ifsta->flags & IEEE80211_STA_TKIP_WEP_USED))) {
d9fe60de
JB		 426 struct ieee80211_ht_info *ht_info =
427 (struct ieee80211_ht_info *)(ht_ie + 2);
428 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 429 __le16 tmp;
430 u32 flags = local->hw.conf.channel->flags;
431
d9fe60de
JB		 432 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
9ac19a90 434 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
d9fe60de 435 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 436 cap &= ~IEEE80211_HT_CAP_SGI_40;
437 }
438 break;
d9fe60de 439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
9ac19a90 440 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
d9fe60de 441 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 442 cap &= ~IEEE80211_HT_CAP_SGI_40;
443 }
444 break;
445 }
446
447 tmp = cpu_to_le16(cap);
448 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
449 *pos++ = WLAN_EID_HT_CAPABILITY;
450 *pos++ = sizeof(struct ieee80211_ht_cap);
451 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
452 memcpy(pos, &tmp, sizeof(u16));
453 pos += sizeof(u16);
454 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 455 *pos++ = sband->ht_cap.ampdu_factor |
456 (sband->ht_cap.ampdu_density << 2);
457 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 458 }
459
9aed3cc1
JM		 460 add_extra_ies(skb, e_ies, e_ies_len);
461
9ac19a90
JB		 462 kfree(ifsta->assocreq_ies);
463 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
464 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
465 if (ifsta->assocreq_ies)
466 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
467
e50db65c 468 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 469}
470
471
ef422bc0
JB		 472static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
473 u16 stype, u16 reason)
9ac19a90
JB		 474{
475 struct ieee80211_local *local = sdata->local;
ef422bc0 476 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
9ac19a90
JB		 477 struct sk_buff *skb;
478 struct ieee80211_mgmt *mgmt;
9aed3cc1
JM		 479 u8 *ies;
480 size_t ies_len;
9ac19a90 481
9aed3cc1
JM		 482 if (stype == IEEE80211_STYPE_DEAUTH) {
483 ies = sdata->u.sta.ie_deauth;
484 ies_len = sdata->u.sta.ie_deauth_len;
485 } else {
486 ies = sdata->u.sta.ie_disassoc;
487 ies_len = sdata->u.sta.ie_disassoc_len;
488 }
489
490 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) +
491 ies_len);
9ac19a90 492 if (!skb) {
ef422bc0
JB		 493 printk(KERN_DEBUG "%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 495 return;
496 }
497 skb_reserve(skb, local->hw.extra_tx_headroom);
498
499 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
500 memset(mgmt, 0, 24);
501 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
502 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
503 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
ef422bc0 504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 505 skb_put(skb, 2);
ef422bc0 506 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 507 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
508
9aed3cc1
JM		 509 add_extra_ies(skb, ies, ies_len);
510
5394af4d 511 ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 512}
513
572e0012
KV		 514void ieee80211_send_pspoll(struct ieee80211_local *local,
515 struct ieee80211_sub_if_data *sdata)
516{
517 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
518 struct ieee80211_pspoll *pspoll;
519 struct sk_buff *skb;
520 u16 fc;
521
522 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
523 if (!skb) {
524 printk(KERN_DEBUG "%s: failed to allocate buffer for "
525 "pspoll frame\n", sdata->dev->name);
526 return;
527 }
528 skb_reserve(skb, local->hw.extra_tx_headroom);
529
530 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
531 memset(pspoll, 0, sizeof(*pspoll));
532 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
533 pspoll->frame_control = cpu_to_le16(fc);
534 pspoll->aid = cpu_to_le16(ifsta->aid);
535
536 /* aid in PS-Poll has its two MSBs each set to 1 */
537 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
538
539 memcpy(pspoll->bssid, ifsta->bssid, ETH_ALEN);
540 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
541
542 ieee80211_tx_skb(sdata, skb, 0);
543
544 return;
545}
546
60f8b39c 547/* MLME */
f698d856 548static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
99cf5f5f
JB		 549 const size_t supp_rates_len,
550 const u8 *supp_rates)
e2839d8f 551{
e2839d8f
VK		 552 struct ieee80211_local *local = sdata->local;
553 int i, have_higher_than_11mbit = 0;
554
e2839d8f 555 /* cf. IEEE 802.11 9.2.12 */
99cf5f5f
JB		 556 for (i = 0; i < supp_rates_len; i++)
557 if ((supp_rates[i] & 0x7f) * 5 > 110)
e2839d8f
VK		 558 have_higher_than_11mbit = 1;
559
560 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
561 have_higher_than_11mbit)
562 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
563 else
564 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
565
3d35f7c6 566 ieee80211_set_wmm_default(sdata);
e2839d8f
VK		 567}
568
f698d856 569static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 570 struct ieee80211_if_sta *ifsta,
571 u8 *wmm_param, size_t wmm_param_len)
572{
f0706e82
JB		 573 struct ieee80211_tx_queue_params params;
574 size_t left;
575 int count;
576 u8 *pos;
577
3434fbd3
JB		 578 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
579 return;
580
581 if (!wmm_param)
582 return;
583
f0706e82
JB		 584 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
585 return;
586 count = wmm_param[6] & 0x0f;
587 if (count == ifsta->wmm_last_param_set)
588 return;
589 ifsta->wmm_last_param_set = count;
590
591 pos = wmm_param + 8;
592 left = wmm_param_len - 8;
593
594 memset(&params, 0, sizeof(params));
595
596 if (!local->ops->conf_tx)
597 return;
598
599 local->wmm_acm = 0;
600 for (; left >= 4; left -= 4, pos += 4) {
601 int aci = (pos[0] >> 5) & 0x03;
602 int acm = (pos[0] >> 4) & 0x01;
603 int queue;
604
605 switch (aci) {
606 case 1:
e100bb64 607 queue = 3;
988c0f72 608 if (acm)
f0706e82 609 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 610 break;
611 case 2:
e100bb64 612 queue = 1;
988c0f72 613 if (acm)
f0706e82 614 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 615 break;
616 case 3:
e100bb64 617 queue = 0;
988c0f72 618 if (acm)
f0706e82 619 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 620 break;
621 case 0:
622 default:
e100bb64 623 queue = 2;
988c0f72 624 if (acm)
f0706e82 625 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 626 break;
627 }
628
629 params.aifs = pos[0] & 0x0f;
630 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
631 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 632 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 633#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 634 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 635 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 636 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 637 params.cw_max, params.txop);
638#endif
f0706e82
JB		 639 /* TODO: handle ACM (block TX, fallback to next lowest allowed
640 * AC for now) */
641 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
642 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 643 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 644 }
645 }
646}
647
1fb3606b 648static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
a97b77b9
VN		 649{
650 u8 mask;
651 u8 index, indexn1, indexn2;
652 struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
653
654 aid &= 0x3fff;
655 index = aid / 8;
656 mask = 1 << (aid & 7);
657
a97b77b9
VN		 658 indexn1 = tim->bitmap_ctrl & 0xfe;
659 indexn2 = elems->tim_len + indexn1 - 4;
660
661 if (index < indexn1 || index > indexn2)
662 return false;
663
664 index -= indexn1;
665
666 return !!(tim->virtual_map[index] & mask);
667}
668
7a5158ef
JB		 669static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
670 u16 capab, bool erp_valid, u8 erp)
5628221c 671{
bda3933a 672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ebd74487 673#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 674 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ebd74487 675#endif
471b3efd 676 u32 changed = 0;
7a5158ef
JB		 677 bool use_protection;
678 bool use_short_preamble;
679 bool use_short_slot;
680
681 if (erp_valid) {
682 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
683 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
684 } else {
685 use_protection = false;
686 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
687 }
688
689 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 690
471b3efd 691 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 692#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 693 if (net_ratelimit()) {
0c68ae26 694 printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n",
471b3efd 695 sdata->dev->name,
5628221c 696 use_protection ? "enabled" : "disabled",
0c68ae26 697 ifsta->bssid);
5628221c 698 }
f4ea83dd 699#endif
471b3efd
JB		 700 bss_conf->use_cts_prot = use_protection;
701 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 702 }
7e9ed188 703
d43c7b37 704 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 705#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 706 if (net_ratelimit()) {
707 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0c68ae26 708 " (BSSID=%pM)\n",
471b3efd 709 sdata->dev->name,
d43c7b37 710 use_short_preamble ? "short" : "long",
0c68ae26 711 ifsta->bssid);
7e9ed188 712 }
f4ea83dd 713#endif
d43c7b37 714 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 715 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 716 }
d9430a32 717
7a5158ef
JB		 718 if (use_short_slot != bss_conf->use_short_slot) {
719#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
720 if (net_ratelimit()) {
391429c1
CL		 721 printk(KERN_DEBUG "%s: switched to %s slot time"
722 " (BSSID=%pM)\n",
7a5158ef
JB		 723 sdata->dev->name,
724 use_short_slot ? "short" : "long",
725 ifsta->bssid);
726 }
727#endif
728 bss_conf->use_short_slot = use_short_slot;
729 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 730 }
731
732 return changed;
733}
734
f5e5bf25
TW		 735static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
736 struct ieee80211_if_sta *ifsta)
737{
738 union iwreq_data wrqu;
739 memset(&wrqu, 0, sizeof(wrqu));
740 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
741 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
742 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
743 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
744}
745
f698d856 746static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 747 struct ieee80211_if_sta *ifsta)
748{
74af0250
LT		 749 char *buf;
750 size_t len;
751 int i;
f0706e82
JB		 752 union iwreq_data wrqu;
753
74af0250
LT		 754 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
755 return;
756
757 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
758 ifsta->assocresp_ies_len), GFP_KERNEL);
759 if (!buf)
760 return;
761
762 len = sprintf(buf, "ASSOCINFO(");
f0706e82 763 if (ifsta->assocreq_ies) {
74af0250
LT		 764 len += sprintf(buf + len, "ReqIEs=");
765 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
766 len += sprintf(buf + len, "%02x",
767 ifsta->assocreq_ies[i]);
768 }
f0706e82 769 }
087d833e 770 if (ifsta->assocresp_ies) {
74af0250
LT		 771 if (ifsta->assocreq_ies)
772 len += sprintf(buf + len, " ");
773 len += sprintf(buf + len, "RespIEs=");
774 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
775 len += sprintf(buf + len, "%02x",
776 ifsta->assocresp_ies[i]);
777 }
f0706e82 778 }
74af0250
LT		 779 len += sprintf(buf + len, ")");
780
781 if (len > IW_CUSTOM_MAX) {
782 len = sprintf(buf, "ASSOCRESPIE=");
783 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
784 len += sprintf(buf + len, "%02x",
785 ifsta->assocresp_ies[i]);
786 }
787 }
788
ad788b5e
JL		 789 if (len <= IW_CUSTOM_MAX) {
790 memset(&wrqu, 0, sizeof(wrqu));
791 wrqu.data.length = len;
792 wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf);
793 }
74af0250
LT		 794
795 kfree(buf);
f0706e82
JB		 796}
797
798
f698d856 799static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
ae5eb026
JB		 800 struct ieee80211_if_sta *ifsta,
801 u32 bss_info_changed)
f0706e82 802{
471b3efd 803 struct ieee80211_local *local = sdata->local;
38668c05 804 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
f0706e82 805
c2b13452 806 struct ieee80211_bss *bss;
d6f2da5b 807
ae5eb026 808 bss_info_changed |= BSS_CHANGED_ASSOC;
f5e5bf25 809 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 810
05c914fe 811 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f5e5bf25 812 return;
21c0cbe7 813
f5e5bf25
TW		 814 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
815 conf->channel->center_freq,
816 ifsta->ssid, ifsta->ssid_len);
817 if (bss) {
818 /* set timing information */
bda3933a
JB		 819 sdata->vif.bss_conf.beacon_int = bss->beacon_int;
820 sdata->vif.bss_conf.timestamp = bss->timestamp;
821 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 822
ae5eb026 823 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
7a5158ef 824 bss->capability, bss->has_erp_value, bss->erp_value);
9ac19a90
JB		 825
826 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 827 }
828
9ac19a90
JB		 829 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
830 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
831 ieee80211_sta_send_associnfo(sdata, ifsta);
9306102e 832
9ac19a90
JB		 833 ifsta->last_probe = jiffies;
834 ieee80211_led_assoc(local, 1);
9306102e 835
bda3933a 836 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 837 /*
838 * For now just always ask the driver to update the basic rateset
839 * when we have associated, we aren't checking whether it actually
840 * changed or not.
841 */
ae5eb026
JB		 842 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
843 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 844
4be8c387
JB		 845 if (local->powersave) {
846 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) &&
847 local->hw.conf.dynamic_ps_timeout > 0) {
520eb820 848 mod_timer(&local->dynamic_ps_timer, jiffies +
46f2c4bd
JB		 849 msecs_to_jiffies(
850 local->hw.conf.dynamic_ps_timeout));
4be8c387
JB		 851 } else {
852 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
853 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 854 conf->flags |= IEEE80211_CONF_PS;
4be8c387 855 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
520eb820 856 }
e0cb686f
KV		 857 }
858
9ac19a90
JB		 859 netif_tx_start_all_queues(sdata->dev);
860 netif_carrier_on(sdata->dev);
f0706e82 861
9ac19a90 862 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 863}
864
9ac19a90
JB		 865static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
866 struct ieee80211_if_sta *ifsta)
f0706e82 867{
9ac19a90
JB		 868 ifsta->direct_probe_tries++;
869 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26
JB		 870 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
871 sdata->dev->name, ifsta->bssid);
9ac19a90 872 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 873 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 874
875 /*
876 * Most likely AP is not in the range so remove the
877 * bss information associated to the AP
878 */
879 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
880 sdata->local->hw.conf.channel->center_freq,
881 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 882 return;
883 }
f0706e82 884
0c68ae26
JB		 885 printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n",
886 sdata->dev->name, ifsta->bssid,
9ac19a90 887 ifsta->direct_probe_tries);
f0706e82 888
9ac19a90 889 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82 890
9ac19a90
JB		 891 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
892
893 /* Direct probe is sent to broadcast address as some APs
894 * will not answer to direct packet in unassociated state.
895 */
896 ieee80211_send_probe_req(sdata, NULL,
897 ifsta->ssid, ifsta->ssid_len);
898
899 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
60f8b39c 900}
f0706e82 901
9ac19a90
JB		 902
903static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
904 struct ieee80211_if_sta *ifsta)
f0706e82 905{
9ac19a90
JB		 906 ifsta->auth_tries++;
907 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 908 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 909 " timed out\n",
0c68ae26 910 sdata->dev->name, ifsta->bssid);
9ac19a90 911 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 912 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 913 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
914 sdata->local->hw.conf.channel->center_freq,
915 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 916 return;
917 }
f0706e82 918
9ac19a90 919 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0c68ae26
JB		 920 printk(KERN_DEBUG "%s: authenticate with AP %pM\n",
921 sdata->dev->name, ifsta->bssid);
f0706e82 922
9ac19a90
JB		 923 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
924
925 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
f0706e82
JB		 926}
927
5925d976
VN		 928/*
929 * The disassoc 'reason' argument can be either our own reason
930 * if self disconnected or a reason code from the AP.
931 */
aa458d17
TW		 932static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
933 struct ieee80211_if_sta *ifsta, bool deauth,
934 bool self_disconnected, u16 reason)
935{
936 struct ieee80211_local *local = sdata->local;
937 struct sta_info *sta;
e0cb686f 938 u32 changed = 0, config_changed = 0;
aa458d17
TW		 939
940 rcu_read_lock();
941
942 sta = sta_info_get(local, ifsta->bssid);
943 if (!sta) {
944 rcu_read_unlock();
945 return;
946 }
947
948 if (deauth) {
949 ifsta->direct_probe_tries = 0;
950 ifsta->auth_tries = 0;
951 }
952 ifsta->assoc_scan_tries = 0;
953 ifsta->assoc_tries = 0;
954
24e64622 955 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 956 netif_carrier_off(sdata->dev);
957
2dace10e 958 ieee80211_sta_tear_down_BA_sessions(sta);
aa458d17
TW		 959
960 if (self_disconnected) {
961 if (deauth)
ef422bc0
JB		 962 ieee80211_send_deauth_disassoc(sdata,
963 IEEE80211_STYPE_DEAUTH, reason);
aa458d17 964 else
ef422bc0
JB		 965 ieee80211_send_deauth_disassoc(sdata,
966 IEEE80211_STYPE_DISASSOC, reason);
aa458d17
TW		 967 }
968
f5e5bf25
TW		 969 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
970 changed |= ieee80211_reset_erp_info(sdata);
971
f5e5bf25 972 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 973 changed |= BSS_CHANGED_ASSOC;
974 sdata->vif.bss_conf.assoc = false;
f5e5bf25
TW		 975
976 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17 977
7a947080 978 if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) {
aa458d17 979 ifsta->state = IEEE80211_STA_MLME_DISABLED;
7a947080
VT		 980 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
981 sdata->local->hw.conf.channel->center_freq,
982 ifsta->ssid, ifsta->ssid_len);
983 }
aa458d17 984
aa458d17
TW		 985 rcu_read_unlock();
986
4797938c 987 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 988 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 989
a8302de9
VT		 990 local->power_constr_level = 0;
991
520eb820
KV		 992 del_timer_sync(&local->dynamic_ps_timer);
993 cancel_work_sync(&local->dynamic_ps_enable_work);
994
e0cb686f
KV		 995 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
996 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
997 config_changed |= IEEE80211_CONF_CHANGE_PS;
998 }
ae5eb026 999
e0cb686f 1000 ieee80211_hw_config(local, config_changed);
ae5eb026 1001 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1002
1003 rcu_read_lock();
1004
1005 sta = sta_info_get(local, ifsta->bssid);
1006 if (!sta) {
1007 rcu_read_unlock();
1008 return;
1009 }
1010
1011 sta_info_unlink(&sta);
1012
1013 rcu_read_unlock();
1014
1015 sta_info_destroy(sta);
aa458d17 1016}
f0706e82 1017
9ac19a90
JB		 1018static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1019{
1020 if (!sdata || !sdata->default_key ||
1021 sdata->default_key->conf.alg != ALG_WEP)
1022 return 0;
1023 return 1;
1024}
1025
f698d856 1026static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1027 struct ieee80211_if_sta *ifsta)
1028{
f698d856 1029 struct ieee80211_local *local = sdata->local;
c2b13452 1030 struct ieee80211_bss *bss;
5b98b1f7
JB		 1031 int bss_privacy;
1032 int wep_privacy;
1033 int privacy_invoked;
f0706e82 1034
5b98b1f7 1035 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1036 return 0;
1037
f698d856 1038 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1039 local->hw.conf.channel->center_freq,
cffdd30d 1040 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1041 if (!bss)
1042 return 0;
1043
5b98b1f7 1044 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1045 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1046 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1047
3e122be0 1048 ieee80211_rx_bss_put(local, bss);
f0706e82 1049
5b98b1f7
JB		 1050 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1051 return 0;
1052
1053 return 1;
f0706e82
JB		 1054}
1055
f698d856 1056static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1057 struct ieee80211_if_sta *ifsta)
1058{
1059 ifsta->assoc_tries++;
1060 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1061 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1062 " timed out\n",
0c68ae26 1063 sdata->dev->name, ifsta->bssid);
48c2fc59 1064 ifsta->state = IEEE80211_STA_MLME_DISABLED;
4a68ec53 1065 ieee80211_sta_send_apinfo(sdata, ifsta);
7a947080
VT		 1066 ieee80211_rx_bss_remove(sdata, ifsta->bssid,
1067 sdata->local->hw.conf.channel->center_freq,
1068 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1069 return;
1070 }
1071
48c2fc59 1072 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0c68ae26
JB		 1073 printk(KERN_DEBUG "%s: associate with AP %pM\n",
1074 sdata->dev->name, ifsta->bssid);
f698d856 1075 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1076 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1077 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1078 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1079 return;
1080 }
1081
f698d856 1082 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1083
1084 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1085}
1086
1087
f698d856 1088static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1089 struct ieee80211_if_sta *ifsta)
1090{
f698d856 1091 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1092 struct sta_info *sta;
1093 int disassoc;
1094
1095 /* TODO: start monitoring current AP signal quality and number of
1096 * missed beacons. Scan other channels every now and then and search
1097 * for better APs. */
1098 /* TODO: remove expired BSSes */
1099
48c2fc59 1100 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1101
d0709a65
JB		 1102 rcu_read_lock();
1103
f0706e82
JB		 1104 sta = sta_info_get(local, ifsta->bssid);
1105 if (!sta) {
0c68ae26
JB		 1106 printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
1107 sdata->dev->name, ifsta->bssid);
f0706e82
JB		 1108 disassoc = 1;
1109 } else {
1110 disassoc = 0;
1111 if (time_after(jiffies,
1112 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1113 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1114 printk(KERN_DEBUG "%s: No ProbeResp from "
0c68ae26 1115 "current AP %pM - assume out of "
f0706e82 1116 "range\n",
0c68ae26 1117 sdata->dev->name, ifsta->bssid);
f0706e82 1118 disassoc = 1;
d6f2da5b 1119 } else
f698d856 1120 ieee80211_send_probe_req(sdata, ifsta->bssid,
4dfe51e1
JB		 1121 ifsta->ssid,
1122 ifsta->ssid_len);
d6f2da5b 1123 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1124 } else {
d6f2da5b 1125 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1126 if (time_after(jiffies, ifsta->last_probe +
1127 IEEE80211_PROBE_INTERVAL)) {
1128 ifsta->last_probe = jiffies;
f698d856 1129 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1130 ifsta->ssid,
1131 ifsta->ssid_len);
1132 }
1133 }
f0706e82 1134 }
d0709a65
JB		 1135
1136 rcu_read_unlock();
1137
7a947080 1138 if (disassoc)
60f8b39c
JB		 1139 ieee80211_set_disassoc(sdata, ifsta, true, true,
1140 WLAN_REASON_PREV_AUTH_NOT_VALID);
7a947080 1141 else
60f8b39c
JB		 1142 mod_timer(&ifsta->timer, jiffies +
1143 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1144}
1145
1146
f698d856 1147static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1148 struct ieee80211_if_sta *ifsta)
1149{
f698d856 1150 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1151 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1152 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1153}
1154
1155
f698d856 1156static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1157 struct ieee80211_if_sta *ifsta,
1158 struct ieee80211_mgmt *mgmt,
1159 size_t len)
1160{
1161 u8 *pos;
1162 struct ieee802_11_elems elems;
1163
f0706e82 1164 pos = mgmt->u.auth.variable;
67a4cce4 1165 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1166 if (!elems.challenge)
f0706e82 1167 return;
f698d856 1168 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1169 elems.challenge_len + 2, 1);
1170}
1171
f698d856 1172static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1173 struct ieee80211_if_sta *ifsta,
1174 struct ieee80211_mgmt *mgmt,
1175 size_t len)
1176{
f0706e82
JB		 1177 u16 auth_alg, auth_transaction, status_code;
1178
48c2fc59 1179 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
05c914fe 1180 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82 1181 return;
f0706e82 1182
f4ea83dd 1183 if (len < 24 + 6)
f0706e82 1184 return;
f0706e82 1185
05c914fe 1186 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1187 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1188 return;
f0706e82 1189
05c914fe 1190 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
f4ea83dd 1191 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1192 return;
f0706e82
JB		 1193
1194 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1195 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1196 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1197
05c914fe 1198 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
135a2110
JB		 1199 /*
1200 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1201 * networks and most implementations do not seem to use it.
1202 * However, try to reply to authentication attempts if someone
1203 * has actually implemented this.
135a2110 1204 */
f4ea83dd 1205 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1206 return;
f698d856 1207 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1208 }
1209
1210 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1211 auth_transaction != ifsta->auth_transaction)
f0706e82 1212 return;
f0706e82
JB		 1213
1214 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1215 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1216 u8 algs[3];
1217 const int num_algs = ARRAY_SIZE(algs);
1218 int i, pos;
1219 algs[0] = algs[1] = algs[2] = 0xff;
1220 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1221 algs[0] = WLAN_AUTH_OPEN;
1222 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1223 algs[1] = WLAN_AUTH_SHARED_KEY;
1224 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1225 algs[2] = WLAN_AUTH_LEAP;
1226 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1227 pos = 0;
1228 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1229 pos = 1;
1230 else
1231 pos = 2;
1232 for (i = 0; i < num_algs; i++) {
1233 pos++;
1234 if (pos >= num_algs)
1235 pos = 0;
1236 if (algs[pos] == ifsta->auth_alg ||
1237 algs[pos] == 0xff)
1238 continue;
1239 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1240 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1241 continue;
1242 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1243 break;
1244 }
1245 }
1246 return;
1247 }
1248
1249 switch (ifsta->auth_alg) {
1250 case WLAN_AUTH_OPEN:
1251 case WLAN_AUTH_LEAP:
f698d856 1252 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1253 break;
1254 case WLAN_AUTH_SHARED_KEY:
1255 if (ifsta->auth_transaction == 4)
f698d856 1256 ieee80211_auth_completed(sdata, ifsta);
f0706e82 1257 else
f698d856 1258 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 1259 break;
1260 }
1261}
1262
1263
f698d856 1264static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1265 struct ieee80211_if_sta *ifsta,
1266 struct ieee80211_mgmt *mgmt,
1267 size_t len)
1268{
1269 u16 reason_code;
1270
f4ea83dd 1271 if (len < 24 + 2)
f0706e82 1272 return;
f0706e82 1273
f4ea83dd 1274 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1275 return;
f0706e82
JB		 1276
1277 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1278
988c0f72 1279 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
97c8b013
ZY		 1280 printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n",
1281 sdata->dev->name, reason_code);
f0706e82 1282
48c2fc59
TW		 1283 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
1284 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
1285 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 1286 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 1287 mod_timer(&ifsta->timer, jiffies +
1288 IEEE80211_RETRY_AUTH_INTERVAL);
1289 }
1290
aa458d17 1291 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 1292 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1293}
1294
1295
f698d856 1296static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1297 struct ieee80211_if_sta *ifsta,
1298 struct ieee80211_mgmt *mgmt,
1299 size_t len)
1300{
1301 u16 reason_code;
1302
f4ea83dd 1303 if (len < 24 + 2)
f0706e82 1304 return;
f0706e82 1305
f4ea83dd 1306 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 1307 return;
f0706e82
JB		 1308
1309 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1310
d6f2da5b 1311 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
97c8b013
ZY		 1312 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1313 sdata->dev->name, reason_code);
f0706e82 1314
48c2fc59
TW		 1315 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
1316 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 1317 mod_timer(&ifsta->timer, jiffies +
1318 IEEE80211_RETRY_AUTH_INTERVAL);
1319 }
1320
5925d976 1321 ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code);
f0706e82
JB		 1322}
1323
1324
471b3efd 1325static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1326 struct ieee80211_if_sta *ifsta,
1327 struct ieee80211_mgmt *mgmt,
1328 size_t len,
1329 int reassoc)
1330{
471b3efd 1331 struct ieee80211_local *local = sdata->local;
8318d78a 1332 struct ieee80211_supported_band *sband;
f0706e82 1333 struct sta_info *sta;
881d948c 1334 u32 rates, basic_rates;
f0706e82
JB		 1335 u16 capab_info, status_code, aid;
1336 struct ieee802_11_elems elems;
bda3933a 1337 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1338 u8 *pos;
ae5eb026 1339 u32 changed = 0;
f0706e82 1340 int i, j;
ddf4ac53 1341 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1342 u16 ap_ht_cap_flags;
f0706e82
JB		 1343
1344 /* AssocResp and ReassocResp have identical structure, so process both
1345 * of them in this function. */
1346
48c2fc59 1347 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 1348 return;
f0706e82 1349
f4ea83dd 1350 if (len < 24 + 6)
f0706e82 1351 return;
f0706e82 1352
f4ea83dd 1353 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1354 return;
f0706e82
JB		 1355
1356 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1357 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1358 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1359
0c68ae26 1360 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1361 "status=%d aid=%d)\n",
0c68ae26 1362 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1363 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1364
63a5ab82
JM		 1365 pos = mgmt->u.assoc_resp.variable;
1366 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1367
1368 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1369 elems.timeout_int && elems.timeout_int_len == 5 &&
1370 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1371 u32 tu, ms;
f797eb7e 1372 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1373 ms = tu * 1024 / 1000;
1374 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1375 "comeback duration %u TU (%u ms)\n",
1376 sdata->dev->name, tu, ms);
1377 if (ms > IEEE80211_ASSOC_TIMEOUT)
1378 mod_timer(&ifsta->timer,
1379 jiffies + msecs_to_jiffies(ms));
1380 return;
1381 }
1382
f0706e82
JB		 1383 if (status_code != WLAN_STATUS_SUCCESS) {
1384 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1385 sdata->dev->name, status_code);
8a69aa93
DD		 1386 /* if this was a reassociation, ensure we try a "full"
1387 * association next time. This works around some broken APs
1388 * which do not correctly reject reassociation requests. */
d6f2da5b 1389 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1390 return;
1391 }
1392
1dd84aa2
JB		 1393 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1394 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1395 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1396 aid &= ~(BIT(15) | BIT(14));
1397
f0706e82
JB		 1398 if (!elems.supp_rates) {
1399 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1400 sdata->dev->name);
f0706e82
JB		 1401 return;
1402 }
1403
f698d856 1404 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 1405 ifsta->aid = aid;
1406 ifsta->ap_capab = capab_info;
1407
1408 kfree(ifsta->assocresp_ies);
1409 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1410 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1411 if (ifsta->assocresp_ies)
1412 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1413
d0709a65
JB		 1414 rcu_read_lock();
1415
f0706e82
JB		 1416 /* Add STA entry for the AP */
1417 sta = sta_info_get(local, ifsta->bssid);
1418 if (!sta) {
c2b13452 1419 struct ieee80211_bss *bss;
ddf4ac53
JB		 1420
1421 newsta = true;
d0709a65 1422
73651ee6
JB		 1423 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1424 if (!sta) {
1425 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1426 " the AP\n", sdata->dev->name);
d0709a65 1427 rcu_read_unlock();
f0706e82
JB		 1428 return;
1429 }
60f8b39c
JB		 1430 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
1431 local->hw.conf.channel->center_freq,
1432 ifsta->ssid, ifsta->ssid_len);
1433 if (bss) {
1434 sta->last_signal = bss->signal;
1435 sta->last_qual = bss->qual;
1436 sta->last_noise = bss->noise;
1437 ieee80211_rx_bss_put(local, bss);
1438 }
f709fc69 1439
60f8b39c
JB		 1440 /* update new sta with its last rx activity */
1441 sta->last_rx = jiffies;
f709fc69 1442 }
f709fc69 1443
60f8b39c
JB		 1444 /*
1445 * FIXME: Do we really need to update the sta_info's information here?
1446 * We already know about the AP (we found it in our list) so it
1447 * should already be filled with the right info, no?
1448 * As is stands, all this is racy because typically we assume
1449 * the information that is filled in here (except flags) doesn't
1450 * change while a STA structure is alive. As such, it should move
1451 * to between the sta_info_alloc() and sta_info_insert() above.
1452 */
f709fc69 1453
60f8b39c
JB		 1454 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1455 WLAN_STA_AUTHORIZED);
05e5e883 1456
60f8b39c
JB		 1457 rates = 0;
1458 basic_rates = 0;
1459 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1460
60f8b39c
JB		 1461 for (i = 0; i < elems.supp_rates_len; i++) {
1462 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1463 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1464
60f8b39c
JB		 1465 if (rate > 110)
1466 have_higher_than_11mbit = true;
1467
1468 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1469 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1470 rates |= BIT(j);
d61272cb
TW		 1471 if (is_basic)
1472 basic_rates |= BIT(j);
1473 break;
1474 }
f709fc69 1475 }
f709fc69
LCC		 1476 }
1477
60f8b39c
JB		 1478 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1479 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
d61272cb 1480 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f0706e82 1481
60f8b39c
JB		 1482 if (rate > 110)
1483 have_higher_than_11mbit = true;
f0706e82 1484
60f8b39c 1485 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1486 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1487 rates |= BIT(j);
d61272cb
TW		 1488 if (is_basic)
1489 basic_rates |= BIT(j);
1490 break;
1491 }
60f8b39c 1492 }
1ebebea8 1493 }
f0706e82 1494
323ce79a 1495 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1496 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1497
1498 /* cf. IEEE 802.11 9.2.12 */
1499 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1500 have_higher_than_11mbit)
1501 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1502 else
1503 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1504
ae5eb026
JB		 1505 if (elems.ht_cap_elem)
1506 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1507 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1508
1509 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1510
4b7679a5 1511 rate_control_rate_init(sta);
f0706e82 1512
5394af4d
JM		 1513 if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
1514 set_sta_flags(sta, WLAN_STA_MFP);
1515
ddf4ac53 1516 if (elems.wmm_param)
60f8b39c 1517 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1518
1519 if (newsta) {
1520 int err = sta_info_insert(sta);
1521 if (err) {
1522 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1523 " the AP (error %d)\n", sdata->dev->name, err);
1524 rcu_read_unlock();
1525 return;
1526 }
1527 }
1528
1529 rcu_read_unlock();
1530
1531 if (elems.wmm_param)
60f8b39c
JB		 1532 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1533 elems.wmm_param_len);
f0706e82 1534
ae5eb026
JB		 1535 if (elems.ht_info_elem && elems.wmm_param &&
1536 (ifsta->flags & IEEE80211_STA_WMM_ENABLED))
1537 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1538 ap_ht_cap_flags);
1539
60f8b39c
JB		 1540 /* set AID and assoc capability,
1541 * ieee80211_set_associated() will tell the driver */
1542 bss_conf->aid = aid;
1543 bss_conf->assoc_capability = capab_info;
ae5eb026 1544 ieee80211_set_associated(sdata, ifsta, changed);
f0706e82 1545
60f8b39c 1546 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 1547}
1548
1549
99cf5f5f
JB		 1550static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1551 struct ieee80211_if_sta *ifsta,
1552 const u8 *bssid, const int beacon_int,
1553 const int freq,
1554 const size_t supp_rates_len,
1555 const u8 *supp_rates,
1556 const u16 capability)
a607268a 1557{
f698d856 1558 struct ieee80211_local *local = sdata->local;
c4e3a584 1559 int res = 0, rates, i, j;
a607268a
BR		 1560 struct sk_buff *skb;
1561 struct ieee80211_mgmt *mgmt;
a607268a 1562 u8 *pos;
a607268a 1563 struct ieee80211_supported_band *sband;
507b06d0 1564 union iwreq_data wrqu;
a607268a 1565
c4e3a584
AF		 1566 if (local->ops->reset_tsf) {
1567 /* Reset own TSF to allow time synchronization work. */
1568 local->ops->reset_tsf(local_to_hw(local));
1569 }
1570
1571 if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&
99cf5f5f 1572 memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0)
c4e3a584
AF		 1573 return res;
1574
9aed3cc1
JM		 1575 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
1576 sdata->u.sta.ie_proberesp_len);
e2ef12d3
RR		 1577 if (!skb) {
1578 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1579 "response\n", sdata->dev->name);
1580 return -ENOMEM;
1581 }
1582
c4e3a584
AF		 1583 if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {
1584 /* Remove possible STA entries from other IBSS networks. */
1585 sta_info_flush_delayed(sdata);
a607268a 1586 }
c4e3a584 1587
99cf5f5f 1588 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81 1589 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 1590 if (res)
1591 return res;
1592
99cf5f5f 1593 local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10;
a607268a 1594
99cf5f5f 1595 sdata->drop_unencrypted = capability &
a607268a
BR		 1596 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
1597
99cf5f5f 1598 res = ieee80211_set_freq(sdata, freq);
a607268a 1599
be038b37
AK		 1600 if (res)
1601 return res;
a607268a 1602
99cf5f5f
JB		 1603 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1604
9d139c81 1605 /* Build IBSS probe response */
a607268a 1606
e2ef12d3 1607 skb_reserve(skb, local->hw.extra_tx_headroom);
a607268a 1608
e2ef12d3
RR		 1609 mgmt = (struct ieee80211_mgmt *)
1610 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
1611 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
1612 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
99cf5f5f 1613 IEEE80211_STYPE_PROBE_RESP);
e2ef12d3
RR		 1614 memset(mgmt->da, 0xff, ETH_ALEN);
1615 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
1616 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1617 mgmt->u.beacon.beacon_int =
1618 cpu_to_le16(local->hw.conf.beacon_int);
99cf5f5f 1619 mgmt->u.beacon.capab_info = cpu_to_le16(capability);
a607268a 1620
e2ef12d3
RR		 1621 pos = skb_put(skb, 2 + ifsta->ssid_len);
1622 *pos++ = WLAN_EID_SSID;
1623 *pos++ = ifsta->ssid_len;
1624 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
a607268a 1625
99cf5f5f 1626 rates = supp_rates_len;
e2ef12d3
RR		 1627 if (rates > 8)
1628 rates = 8;
1629 pos = skb_put(skb, 2 + rates);
1630 *pos++ = WLAN_EID_SUPP_RATES;
1631 *pos++ = rates;
99cf5f5f 1632 memcpy(pos, supp_rates, rates);
e2ef12d3 1633
99cf5f5f 1634 if (sband->band == IEEE80211_BAND_2GHZ) {
e2ef12d3
RR		 1635 pos = skb_put(skb, 2 + 1);
1636 *pos++ = WLAN_EID_DS_PARAMS;
1637 *pos++ = 1;
99cf5f5f 1638 *pos++ = ieee80211_frequency_to_channel(freq);
e2ef12d3 1639 }
a607268a 1640
e2ef12d3
RR		 1641 pos = skb_put(skb, 2 + 2);
1642 *pos++ = WLAN_EID_IBSS_PARAMS;
1643 *pos++ = 2;
1644 /* FIX: set ATIM window based on scan results */
1645 *pos++ = 0;
1646 *pos++ = 0;
e039fa4a 1647
99cf5f5f
JB		 1648 if (supp_rates_len > 8) {
1649 rates = supp_rates_len - 8;
e2ef12d3
RR		 1650 pos = skb_put(skb, 2 + rates);
1651 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1652 *pos++ = rates;
99cf5f5f 1653 memcpy(pos, &supp_rates[8], rates);
9d139c81 1654 }
a607268a 1655
9aed3cc1
JM		 1656 add_extra_ies(skb, sdata->u.sta.ie_proberesp,
1657 sdata->u.sta.ie_proberesp_len);
1658
e2ef12d3
RR		 1659 ifsta->probe_resp = skb;
1660
078e1e60
JB		 1661 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
1662 IEEE80211_IFCC_BEACON_ENABLED);
e2ef12d3
RR		 1663
1664
9d139c81 1665 rates = 0;
99cf5f5f
JB		 1666 for (i = 0; i < supp_rates_len; i++) {
1667 int bitrate = (supp_rates[i] & 0x7f) * 5;
9d139c81
JB		 1668 for (j = 0; j < sband->n_bitrates; j++)
1669 if (sband->bitrates[j].bitrate == bitrate)
1670 rates |= BIT(j);
a607268a 1671 }
9d139c81
JB		 1672 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
1673
99cf5f5f 1674 ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates);
a607268a 1675
dfe67012 1676 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
48c2fc59 1677 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 1678 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1679
4492bea6
EG		 1680 ieee80211_led_assoc(local, true);
1681
507b06d0 1682 memset(&wrqu, 0, sizeof(wrqu));
99cf5f5f 1683 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
f698d856 1684 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 1685
1686 return res;
1687}
1688
99cf5f5f
JB		 1689static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
1690 struct ieee80211_if_sta *ifsta,
1691 struct ieee80211_bss *bss)
1692{
1693 return __ieee80211_sta_join_ibss(sdata, ifsta,
1694 bss->bssid, bss->beacon_int,
1695 bss->freq,
1696 bss->supp_rates_len, bss->supp_rates,
1697 bss->capability);
1698}
1699
98c8fccf
JB		 1700static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1701 struct ieee80211_mgmt *mgmt,
1702 size_t len,
1703 struct ieee80211_rx_status *rx_status,
1704 struct ieee802_11_elems *elems,
1705 bool beacon)
1706{
1707 struct ieee80211_local *local = sdata->local;
1708 int freq;
c2b13452 1709 struct ieee80211_bss *bss;
98c8fccf
JB		 1710 struct sta_info *sta;
1711 struct ieee80211_channel *channel;
1712 u64 beacon_timestamp, rx_timestamp;
881d948c 1713 u32 supp_rates = 0;
98c8fccf 1714 enum ieee80211_band band = rx_status->band;
98c8fccf
JB		 1715
1716 if (elems->ds_params && elems->ds_params_len == 1)
1717 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1718 else
1719 freq = rx_status->freq;
1720
1721 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1722
1723 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1724 return;
1725
05c914fe 1726 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates &&
98c8fccf
JB		 1727 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1728 supp_rates = ieee80211_sta_get_rates(local, elems, band);
1729
1730 rcu_read_lock();
1731
1732 sta = sta_info_get(local, mgmt->sa);
1733 if (sta) {
881d948c 1734 u32 prev_rates;
98c8fccf 1735
323ce79a 1736 prev_rates = sta->sta.supp_rates[band];
98c8fccf 1737 /* make sure mandatory rates are always added */
323ce79a 1738 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 1739 ieee80211_mandatory_rates(local, band);
98c8fccf
JB		 1740
1741#ifdef CONFIG_MAC80211_IBSS_DEBUG
323ce79a 1742 if (sta->sta.supp_rates[band] != prev_rates)
98c8fccf 1743 printk(KERN_DEBUG "%s: updated supp_rates set "
0c68ae26 1744 "for %pM based on beacon info (0x%llx | "
98c8fccf 1745 "0x%llx -> 0x%llx)\n",
17741cdc 1746 sdata->dev->name,
0c68ae26 1747 sta->sta.addr,
98c8fccf
JB		 1748 (unsigned long long) prev_rates,
1749 (unsigned long long) supp_rates,
323ce79a 1750 (unsigned long long) sta->sta.supp_rates[band]);
98c8fccf
JB		 1751#endif
1752 } else {
ab1f5c0b 1753 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
98c8fccf
JB		 1754 }
1755
1756 rcu_read_unlock();
1757 }
1758
1759 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1760 channel, beacon);
98c8fccf
JB		 1761 if (!bss)
1762 return;
1763
c481ec97
S		 1764 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
1765 (memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0)) {
1766 struct ieee80211_channel_sw_ie *sw_elem =
1767 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
1768 ieee80211_process_chanswitch(sdata, sw_elem, bss);
1769 }
1770
98c8fccf
JB		 1771 /* was just updated in ieee80211_bss_info_update */
1772 beacon_timestamp = bss->timestamp;
1773
30b89b0f
JB		 1774 /*
1775 * In STA mode, the remaining parameters should not be overridden
1776 * by beacons because they're not necessarily accurate there.
1777 */
05c914fe 1778 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
9859b81e 1779 bss->last_probe_resp && beacon) {
3e122be0 1780 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 1781 return;
1782 }
1783
9d9bf77d 1784 /* check if we need to merge IBSS */
05c914fe 1785 if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
65f0e6a3 1786 (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
fba4a1e6 1787 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 1788 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 1789 elems->ssid_len == sdata->u.sta.ssid_len &&
1790 memcmp(elems->ssid, sdata->u.sta.ssid,
1791 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 1792 if (rx_status->flag & RX_FLAG_TSFT) {
1793 /* in order for correct IBSS merging we need mactime
1794 *
1795 * since mactime is defined as the time the first data
1796 * symbol of the frame hits the PHY, and the timestamp
1797 * of the beacon is defined as "the time that the data
1798 * symbol containing the first bit of the timestamp is
1799 * transmitted to the PHY plus the transmitting STA’s
1800 * delays through its local PHY from the MAC-PHY
1801 * interface to its interface with the WM"
1802 * (802.11 11.1.2) - equals the time this bit arrives at
1803 * the receiver - we have to take into account the
1804 * offset between the two.
1805 * e.g: at 1 MBit that means mactime is 192 usec earlier
1806 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1807 */
0fb8ca45
JM		 1808 int rate;
1809 if (rx_status->flag & RX_FLAG_HT) {
1810 rate = 65; /* TODO: HT rates */
1811 } else {
1812 rate = local->hw.wiphy->bands[band]->
9d9bf77d 1813 bitrates[rx_status->rate_idx].bitrate;
0fb8ca45 1814 }
9d9bf77d
BR		 1815 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
1816 } else if (local && local->ops && local->ops->get_tsf)
1817 /* second best option: get current TSF */
1818 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
1819 else
1820 /* can't merge without knowing the TSF */
1821 rx_timestamp = -1LLU;
1822#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 1823 printk(KERN_DEBUG "RX beacon SA=%pM BSSID="
1824 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1825 mgmt->sa, mgmt->bssid,
9d9bf77d
BR		 1826 (unsigned long long)rx_timestamp,
1827 (unsigned long long)beacon_timestamp,
1828 (unsigned long long)(rx_timestamp - beacon_timestamp),
1829 jiffies);
1830#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1831 if (beacon_timestamp > rx_timestamp) {
576fdeae 1832#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd 1833 printk(KERN_DEBUG "%s: beacon TSF higher than "
0c68ae26
JB		 1834 "local TSF - IBSS merge with BSSID %pM\n",
1835 sdata->dev->name, mgmt->bssid);
fba4a1e6 1836#endif
f698d856 1837 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
ab1f5c0b 1838 ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates);
9d9bf77d
BR		 1839 }
1840 }
1841
3e122be0 1842 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 1843}
1844
1845
f698d856 1846static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1847 struct ieee80211_mgmt *mgmt,
1848 size_t len,
1849 struct ieee80211_rx_status *rx_status)
1850{
ae6a44e3
EK		 1851 size_t baselen;
1852 struct ieee802_11_elems elems;
9859b81e 1853 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 1854
8e7cdbb6
TW		 1855 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1856 return; /* ignore ProbeResp to foreign address */
1857
ae6a44e3
EK		 1858 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1859 if (baselen > len)
1860 return;
1861
1862 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1863 &elems);
1864
98c8fccf 1865 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1866
1867 /* direct probe may be part of the association flow */
1868 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
1869 &ifsta->request)) {
1870 printk(KERN_DEBUG "%s direct probe responded\n",
1871 sdata->dev->name);
1872 ieee80211_authenticate(sdata, ifsta);
1873 }
f0706e82
JB		 1874}
1875
1876
f698d856 1877static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1878 struct ieee80211_mgmt *mgmt,
1879 size_t len,
1880 struct ieee80211_rx_status *rx_status)
1881{
f0706e82 1882 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 1883 size_t baselen;
1884 struct ieee802_11_elems elems;
f698d856 1885 struct ieee80211_local *local = sdata->local;
471b3efd 1886 u32 changed = 0;
1fb3606b 1887 bool erp_valid, directed_tim;
7a5158ef 1888 u8 erp_value = 0;
f0706e82 1889
ae6a44e3
EK		 1890 /* Process beacon from the current BSS */
1891 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1892 if (baselen > len)
1893 return;
1894
1895 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1896
98c8fccf 1897 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true);
f0706e82 1898
05c914fe 1899 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 1900 return;
1901 ifsta = &sdata->u.sta;
1902
d6f2da5b 1903 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 1904 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1905 return;
1906
c481ec97
S		 1907 if (rx_status->freq != local->hw.conf.channel->center_freq)
1908 return;
1909
fe3fa827
JB		 1910 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
1911 elems.wmm_param_len);
1912
4be8c387
JB		 1913 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK &&
1914 local->hw.conf.flags & IEEE80211_CONF_PS) {
1fb3606b 1915 directed_tim = ieee80211_check_tim(&elems, ifsta->aid);
a97b77b9 1916
1fb3606b 1917 if (directed_tim) {
572e0012
KV		 1918 if (local->hw.conf.dynamic_ps_timeout > 0) {
1919 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1920 ieee80211_hw_config(local,
1921 IEEE80211_CONF_CHANGE_PS);
1922 ieee80211_send_nullfunc(local, sdata, 0);
1923 } else {
1924 local->pspolling = true;
1925
1926 /*
1927 * Here is assumed that the driver will be
1928 * able to send ps-poll frame and receive a
1929 * response even though power save mode is
1930 * enabled, but some drivers might require
1931 * to disable power save here. This needs
1932 * to be investigated.
1933 */
1934 ieee80211_send_pspoll(local, sdata);
1935 }
a97b77b9
VN		 1936 }
1937 }
7a5158ef
JB		 1938
1939 if (elems.erp_info && elems.erp_info_len >= 1) {
1940 erp_valid = true;
1941 erp_value = elems.erp_info[0];
1942 } else {
1943 erp_valid = false;
50c4afb9 1944 }
7a5158ef
JB		 1945 changed |= ieee80211_handle_bss_capability(sdata,
1946 le16_to_cpu(mgmt->u.beacon.capab_info),
1947 erp_valid, erp_value);
f0706e82 1948
d3c990fb 1949
ae5eb026
JB		 1950 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
1951 struct sta_info *sta;
1952 struct ieee80211_supported_band *sband;
1953 u16 ap_ht_cap_flags;
1954
1955 rcu_read_lock();
1956
1957 sta = sta_info_get(local, ifsta->bssid);
1958 if (!sta) {
1959 rcu_read_unlock();
1960 return;
1961 }
1962
1963 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1964
1965 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1966 elems.ht_cap_elem, &sta->sta.ht_cap);
1967
1968 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1969
1970 rcu_read_unlock();
1971
1972 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
1973 ap_ht_cap_flags);
d3c990fb
RR		 1974 }
1975
3f2355cb
LR		 1976 if (elems.country_elem) {
1977 /* Note we are only reviewing this on beacons
1978 * for the BSSID we are associated to */
1979 regulatory_hint_11d(local->hw.wiphy,
1980 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1981
1982 /* TODO: IBSS also needs this */
1983 if (elems.pwr_constr_elem)
1984 ieee80211_handle_pwr_constr(sdata,
1985 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1986 elems.pwr_constr_elem,
1987 elems.pwr_constr_elem_len);
3f2355cb
LR		 1988 }
1989
471b3efd 1990 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1991}
1992
1993
f698d856 1994static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1995 struct ieee80211_if_sta *ifsta,
1996 struct ieee80211_mgmt *mgmt,
504a71e4 1997 size_t len)
f0706e82 1998{
f698d856 1999 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2000 int tx_last_beacon;
2001 struct sk_buff *skb;
2002 struct ieee80211_mgmt *resp;
2003 u8 *pos, *end;
2004
05c914fe 2005 if (sdata->vif.type != NL80211_IFTYPE_ADHOC ||
48c2fc59 2006 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2007 len < 24 + 2 || !ifsta->probe_resp)
2008 return;
2009
2010 if (local->ops->tx_last_beacon)
2011 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2012 else
2013 tx_last_beacon = 1;
2014
2015#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2016 printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2017 " (tx_last_beacon=%d)\n",
2018 sdata->dev->name, mgmt->sa, mgmt->da,
2019 mgmt->bssid, tx_last_beacon);
f0706e82
JB		 2020#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2021
2022 if (!tx_last_beacon)
2023 return;
2024
2025 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2026 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2027 return;
2028
2029 end = ((u8 *) mgmt) + len;
2030 pos = mgmt->u.probe_req.variable;
2031 if (pos[0] != WLAN_EID_SSID ||
2032 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2033#ifdef CONFIG_MAC80211_IBSS_DEBUG
2034 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0c68ae26
JB		 2035 "from %pM\n",
2036 sdata->dev->name, mgmt->sa);
f4ea83dd 2037#endif
f0706e82
JB		 2038 return;
2039 }
2040 if (pos[1] != 0 &&
2041 (pos[1] != ifsta->ssid_len ||
2042 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2043 /* Ignore ProbeReq for foreign SSID */
2044 return;
2045 }
2046
2047 /* Reply with ProbeResp */
0ec0b7ac 2048 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2049 if (!skb)
2050 return;
2051
2052 resp = (struct ieee80211_mgmt *) skb->data;
2053 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2054#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26
JB		 2055 printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n",
2056 sdata->dev->name, resp->da);
f0706e82 2057#endif /* CONFIG_MAC80211_IBSS_DEBUG */
e50db65c 2058 ieee80211_tx_skb(sdata, skb, 0);
f0706e82
JB		 2059}
2060
f698d856 2061void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2062 struct ieee80211_rx_status *rx_status)
2063{
f698d856 2064 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2065 struct ieee80211_if_sta *ifsta;
2066 struct ieee80211_mgmt *mgmt;
2067 u16 fc;
2068
2069 if (skb->len < 24)
2070 goto fail;
2071
f0706e82
JB		 2072 ifsta = &sdata->u.sta;
2073
2074 mgmt = (struct ieee80211_mgmt *) skb->data;
2075 fc = le16_to_cpu(mgmt->frame_control);
2076
2077 switch (fc & IEEE80211_FCTL_STYPE) {
2078 case IEEE80211_STYPE_PROBE_REQ:
2079 case IEEE80211_STYPE_PROBE_RESP:
2080 case IEEE80211_STYPE_BEACON:
2081 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2082 case IEEE80211_STYPE_AUTH:
2083 case IEEE80211_STYPE_ASSOC_RESP:
2084 case IEEE80211_STYPE_REASSOC_RESP:
2085 case IEEE80211_STYPE_DEAUTH:
2086 case IEEE80211_STYPE_DISASSOC:
2087 skb_queue_tail(&ifsta->skb_queue, skb);
2088 queue_work(local->hw.workqueue, &ifsta->work);
2089 return;
f0706e82
JB		 2090 }
2091
2092 fail:
2093 kfree_skb(skb);
2094}
2095
f698d856 2096static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2097 struct sk_buff *skb)
2098{
2099 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2100 struct ieee80211_if_sta *ifsta;
2101 struct ieee80211_mgmt *mgmt;
2102 u16 fc;
2103
f0706e82
JB		 2104 ifsta = &sdata->u.sta;
2105
2106 rx_status = (struct ieee80211_rx_status *) skb->cb;
2107 mgmt = (struct ieee80211_mgmt *) skb->data;
2108 fc = le16_to_cpu(mgmt->frame_control);
2109
2110 switch (fc & IEEE80211_FCTL_STYPE) {
2111 case IEEE80211_STYPE_PROBE_REQ:
504a71e4 2112 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2113 break;
2114 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2115 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2116 break;
2117 case IEEE80211_STYPE_BEACON:
f698d856 2118 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2119 break;
2120 case IEEE80211_STYPE_AUTH:
f698d856 2121 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2122 break;
2123 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2124 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2125 break;
2126 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2127 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2128 break;
2129 case IEEE80211_STYPE_DEAUTH:
f698d856 2130 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2131 break;
2132 case IEEE80211_STYPE_DISASSOC:
f698d856 2133 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2134 break;
2135 }
2136
2137 kfree_skb(skb);
2138}
2139
2140
f698d856 2141static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 2142{
f698d856 2143 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2144 int active = 0;
2145 struct sta_info *sta;
2146
d0709a65
JB		 2147 rcu_read_lock();
2148
2149 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2150 if (sta->sdata == sdata &&
f0706e82
JB		 2151 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2152 jiffies)) {
2153 active++;
2154 break;
2155 }
2156 }
d0709a65
JB		 2157
2158 rcu_read_unlock();
f0706e82
JB		 2159
2160 return active;
2161}
2162
2163
f698d856 2164static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2165 struct ieee80211_if_sta *ifsta)
2166{
2167 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2168
f698d856
JBG		 2169 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
2170 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 2171 return;
2172
137f9f46
AF		 2173 if ((sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) &&
2174 (!(sdata->u.sta.flags & IEEE80211_STA_AUTO_CHANNEL_SEL)))
2175 return;
2176
f0706e82 2177 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856 2178 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
2a519311
JB		 2179
2180 /* XXX maybe racy? */
2181 if (sdata->local->scan_req)
2182 return;
2183
2184 memcpy(sdata->local->int_scan_req.ssids[0].ssid,
2185 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2186 sdata->local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2187 ieee80211_request_scan(sdata, &sdata->local->int_scan_req);
f0706e82
JB		 2188}
2189
2190
9c6bd790 2191static void ieee80211_sta_timer(unsigned long data)
f0706e82 2192{
60f8b39c
JB		 2193 struct ieee80211_sub_if_data *sdata =
2194 (struct ieee80211_sub_if_data *) data;
2195 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2196 struct ieee80211_local *local = sdata->local;
f0706e82 2197
60f8b39c
JB		 2198 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2199 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 2200}
2201
f698d856 2202static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2203 struct ieee80211_if_sta *ifsta)
2204{
f698d856 2205 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2206
2207 if (local->ops->reset_tsf) {
2208 /* Reset own TSF to allow time synchronization work. */
2209 local->ops->reset_tsf(local_to_hw(local));
2210 }
2211
2212 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2213
2214
2215 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2216 ifsta->auth_alg = WLAN_AUTH_OPEN;
2217 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2218 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2219 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2220 ifsta->auth_alg = WLAN_AUTH_LEAP;
2221 else
2222 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 2223 ifsta->auth_transaction = -1;
d6f2da5b 2224 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 2225 ifsta->assoc_scan_tries = 0;
9859b81e 2226 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 2227 ifsta->auth_tries = 0;
2228 ifsta->assoc_tries = 0;
24e64622 2229 netif_tx_stop_all_queues(sdata->dev);
f698d856 2230 netif_carrier_off(sdata->dev);
f0706e82
JB		 2231}
2232
2233
f0706e82
JB		 2234static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2235 const char *ssid, int ssid_len)
2236{
2237 int tmp, hidden_ssid;
2238
48225709
MW		 2239 if (ssid_len == ifsta->ssid_len &&
2240 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2241 return 1;
2242
d6f2da5b 2243 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2244 return 0;
2245
2246 hidden_ssid = 1;
2247 tmp = ssid_len;
2248 while (tmp--) {
2249 if (ssid[tmp] != '\0') {
2250 hidden_ssid = 0;
2251 break;
2252 }
2253 }
2254
cb3da8cc 2255 if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
f0706e82
JB		 2256 return 1;
2257
2258 if (ssid_len == 1 && ssid[0] == ' ')
2259 return 1;
2260
2261 return 0;
2262}
2263
f698d856 2264static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2265 struct ieee80211_if_sta *ifsta)
2266{
f698d856 2267 struct ieee80211_local *local = sdata->local;
8318d78a 2268 struct ieee80211_supported_band *sband;
99cf5f5f
JB		 2269 u8 *pos;
2270 u8 bssid[ETH_ALEN];
2271 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
2272 u16 capability;
f0706e82
JB		 2273 int i;
2274
dfe67012
AF		 2275 if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {
2276 memcpy(bssid, ifsta->bssid, ETH_ALEN);
2277 } else {
2278 /* Generate random, not broadcast, locally administered BSSID. Mix in
2279 * own MAC address to make sure that devices that do not have proper
2280 * random number generator get different BSSID. */
2281 get_random_bytes(bssid, ETH_ALEN);
2282 for (i = 0; i < ETH_ALEN; i++)
2283 bssid[i] ^= sdata->dev->dev_addr[i];
2284 bssid[0] &= ~0x01;
2285 bssid[0] |= 0x02;
2286 }
f0706e82 2287
0c68ae26
JB		 2288 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",
2289 sdata->dev->name, bssid);
f0706e82 2290
99cf5f5f 2291 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f0706e82
JB		 2292
2293 if (local->hw.conf.beacon_int == 0)
dc0ae30c 2294 local->hw.conf.beacon_int = 100;
99cf5f5f
JB		 2295
2296 capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 2297
2298 if (sdata->default_key)
99cf5f5f 2299 capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 2300 else
f0706e82 2301 sdata->drop_unencrypted = 0;
988c0f72 2302
99cf5f5f 2303 pos = supp_rates;
8318d78a
JB		 2304 for (i = 0; i < sband->n_bitrates; i++) {
2305 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 2306 *pos++ = (u8) (rate / 5);
2307 }
2308
99cf5f5f
JB		 2309 return __ieee80211_sta_join_ibss(sdata, ifsta,
2310 bssid, local->hw.conf.beacon_int,
2311 local->hw.conf.channel->center_freq,
2312 sband->n_bitrates, supp_rates,
2313 capability);
f0706e82
JB		 2314}
2315
2316
f698d856 2317static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2318 struct ieee80211_if_sta *ifsta)
2319{
f698d856 2320 struct ieee80211_local *local = sdata->local;
c2b13452 2321 struct ieee80211_bss *bss;
f0706e82
JB		 2322 int found = 0;
2323 u8 bssid[ETH_ALEN];
2324 int active_ibss;
2325
2326 if (ifsta->ssid_len == 0)
2327 return -EINVAL;
2328
f698d856 2329 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 2330#ifdef CONFIG_MAC80211_IBSS_DEBUG
2331 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 2332 sdata->dev->name, active_ibss);
f0706e82 2333#endif /* CONFIG_MAC80211_IBSS_DEBUG */
c2b13452
JB		 2334 spin_lock_bh(&local->bss_lock);
2335 list_for_each_entry(bss, &local->bss_list, list) {
f0706e82
JB		 2336 if (ifsta->ssid_len != bss->ssid_len ||
2337 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2338 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2339 continue;
dfe67012
AF		 2340 if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
2341 memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
2342 continue;
f0706e82 2343#ifdef CONFIG_MAC80211_IBSS_DEBUG
0c68ae26 2344 printk(KERN_DEBUG " bssid=%pM found\n", bss->bssid);
f0706e82
JB		 2345#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2346 memcpy(bssid, bss->bssid, ETH_ALEN);
2347 found = 1;
2348 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2349 break;
2350 }
c2b13452 2351 spin_unlock_bh(&local->bss_lock);
f0706e82
JB		 2352
2353#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b 2354 if (found)
0c68ae26
JB		 2355 printk(KERN_DEBUG " sta_find_ibss: selected %pM current "
2356 "%pM\n", bssid, ifsta->bssid);
f0706e82 2357#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb 2358
dfe67012
AF		 2359 if (found &&
2360 ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2361 memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
167ad6f7 2362 int ret;
80693ceb
DD		 2363 int search_freq;
2364
2365 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
2366 search_freq = bss->freq;
2367 else
2368 search_freq = local->hw.conf.channel->center_freq;
2369
f698d856 2370 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 2371 ifsta->ssid, ifsta->ssid_len);
2372 if (!bss)
2373 goto dont_join;
2374
0c68ae26 2375 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
f0706e82 2376 " based on configured SSID\n",
0c68ae26 2377 sdata->dev->name, bssid);
f698d856 2378 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 2379 ieee80211_rx_bss_put(local, bss);
167ad6f7 2380 return ret;
f0706e82 2381 }
80693ceb
DD		 2382
2383dont_join:
f0706e82
JB		 2384#ifdef CONFIG_MAC80211_IBSS_DEBUG
2385 printk(KERN_DEBUG " did not try to join ibss\n");
2386#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2387
2388 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 2389 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 2390 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 2391 mod_timer(&ifsta->timer, jiffies +
2392 IEEE80211_IBSS_MERGE_INTERVAL);
2393 } else if (time_after(jiffies, local->last_scan_completed +
2394 IEEE80211_SCAN_INTERVAL)) {
2395 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856 2396 "join\n", sdata->dev->name);
2a519311
JB		 2397
2398 /* XXX maybe racy? */
2399 if (local->scan_req)
2400 return -EBUSY;
2401
2402 memcpy(local->int_scan_req.ssids[0].ssid,
2403 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
2404 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2405 return ieee80211_request_scan(sdata, &local->int_scan_req);
48c2fc59 2406 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 2407 int interval = IEEE80211_SCAN_INTERVAL;
2408
2409 if (time_after(jiffies, ifsta->ibss_join_req +
2410 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2411 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 2412 (!(local->oper_channel->flags &
2413 IEEE80211_CHAN_NO_IBSS)))
f698d856 2414 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 2415 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 2416 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 2417 " %d MHz\n", sdata->dev->name,
8318d78a 2418 local->hw.conf.channel->center_freq);
f0706e82
JB		 2419 }
2420
2421 /* No IBSS found - decrease scan interval and continue
2422 * scanning. */
2423 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2424 }
2425
48c2fc59 2426 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 2427 mod_timer(&ifsta->timer, jiffies + interval);
2428 return 0;
2429 }
2430
2431 return 0;
2432}
2433
2434
9c6bd790
JB		 2435static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
2436 struct ieee80211_if_sta *ifsta)
f0706e82 2437{
9c6bd790 2438 struct ieee80211_local *local = sdata->local;
c2b13452 2439 struct ieee80211_bss *bss, *selected = NULL;
9c6bd790 2440 int top_rssi = 0, freq;
f0706e82 2441
c2b13452 2442 spin_lock_bh(&local->bss_lock);
9c6bd790 2443 freq = local->oper_channel->center_freq;
c2b13452 2444 list_for_each_entry(bss, &local->bss_list, list) {
9c6bd790
JB		 2445 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2446 continue;
f0706e82 2447
9c6bd790
JB		 2448 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2449 IEEE80211_STA_AUTO_BSSID_SEL |
2450 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
2451 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2452 !!sdata->default_key))
2453 continue;
f0706e82 2454
9c6bd790
JB		 2455 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2456 bss->freq != freq)
2457 continue;
9d139c81 2458
9c6bd790
JB		 2459 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2460 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2461 continue;
f0706e82 2462
9c6bd790
JB		 2463 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2464 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2465 continue;
9d139c81 2466
9c6bd790
JB		 2467 if (!selected || top_rssi < bss->signal) {
2468 selected = bss;
2469 top_rssi = bss->signal;
2470 }
f0706e82 2471 }
9c6bd790
JB		 2472 if (selected)
2473 atomic_inc(&selected->users);
c2b13452 2474 spin_unlock_bh(&local->bss_lock);
9d139c81 2475
9c6bd790
JB		 2476 if (selected) {
2477 ieee80211_set_freq(sdata, selected->freq);
2478 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2479 ieee80211_sta_set_ssid(sdata, selected->ssid,
2480 selected->ssid_len);
2481 ieee80211_sta_set_bssid(sdata, selected->bssid);
99cf5f5f
JB		 2482 ieee80211_sta_def_wmm_params(sdata, selected->supp_rates_len,
2483 selected->supp_rates);
fdfacf0a
JM		 2484 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
2485 sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
2486 else
2487 sdata->u.sta.flags &= ~IEEE80211_STA_MFP_ENABLED;
f0706e82 2488
9c6bd790
JB		 2489 /* Send out direct probe if no probe resp was received or
2490 * the one we have is outdated
2491 */
2492 if (!selected->last_probe_resp ||
2493 time_after(jiffies, selected->last_probe_resp
2494 + IEEE80211_SCAN_RESULT_EXPIRE))
2495 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
2496 else
2497 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
f0706e82 2498
9c6bd790
JB		 2499 ieee80211_rx_bss_put(local, selected);
2500 ieee80211_sta_reset_auth(sdata, ifsta);
2501 return 0;
2502 } else {
2503 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
2504 ifsta->assoc_scan_tries++;
2a519311
JB		 2505 /* XXX maybe racy? */
2506 if (local->scan_req)
2507 return -1;
2508 memcpy(local->int_scan_req.ssids[0].ssid,
2509 ifsta->ssid, IEEE80211_MAX_SSID_LEN);
9c6bd790 2510 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2a519311 2511 local->int_scan_req.ssids[0].ssid_len = 0;
9c6bd790 2512 else
2a519311
JB		 2513 local->int_scan_req.ssids[0].ssid_len = ifsta->ssid_len;
2514 ieee80211_start_scan(sdata, &local->int_scan_req);
9c6bd790
JB		 2515 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
2516 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
e374055a
S		 2517 } else {
2518 ifsta->assoc_scan_tries = 0;
9c6bd790 2519 ifsta->state = IEEE80211_STA_MLME_DISABLED;
e374055a 2520 }
9c6bd790
JB		 2521 }
2522 return -1;
2523}
2524
2525
2526static void ieee80211_sta_work(struct work_struct *work)
2527{
2528 struct ieee80211_sub_if_data *sdata =
2529 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2530 struct ieee80211_local *local = sdata->local;
2531 struct ieee80211_if_sta *ifsta;
2532 struct sk_buff *skb;
2533
2534 if (!netif_running(sdata->dev))
2535 return;
2536
c2b13452 2537 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 2538 return;
2539
05c914fe
JB		 2540 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION &&
2541 sdata->vif.type != NL80211_IFTYPE_ADHOC))
9c6bd790 2542 return;
f0706e82
JB		 2543 ifsta = &sdata->u.sta;
2544
9c6bd790
JB		 2545 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2546 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2547
2548 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
2549 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
2550 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
2551 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2a519311 2552 ieee80211_start_scan(sdata, local->scan_req);
9c6bd790 2553 return;
f0706e82
JB		 2554 }
2555
9c6bd790
JB		 2556 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2557 if (ieee80211_sta_config_auth(sdata, ifsta))
2558 return;
2559 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2560 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2561 return;
d6f2da5b 2562
9c6bd790
JB		 2563 switch (ifsta->state) {
2564 case IEEE80211_STA_MLME_DISABLED:
2565 break;
2566 case IEEE80211_STA_MLME_DIRECT_PROBE:
2567 ieee80211_direct_probe(sdata, ifsta);
2568 break;
2569 case IEEE80211_STA_MLME_AUTHENTICATE:
2570 ieee80211_authenticate(sdata, ifsta);
2571 break;
2572 case IEEE80211_STA_MLME_ASSOCIATE:
2573 ieee80211_associate(sdata, ifsta);
2574 break;
2575 case IEEE80211_STA_MLME_ASSOCIATED:
2576 ieee80211_associated(sdata, ifsta);
2577 break;
2578 case IEEE80211_STA_MLME_IBSS_SEARCH:
2579 ieee80211_sta_find_ibss(sdata, ifsta);
2580 break;
2581 case IEEE80211_STA_MLME_IBSS_JOINED:
2582 ieee80211_sta_merge_ibss(sdata, ifsta);
2583 break;
2584 default:
2585 WARN_ON(1);
2586 break;
2587 }
2588
2589 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
2590 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2591 "mixed-cell disabled - disassociate\n", sdata->dev->name);
2592
2593 ieee80211_set_disassoc(sdata, ifsta, false, true,
2594 WLAN_REASON_UNSPECIFIED);
2595 }
f0706e82
JB		 2596}
2597
9c6bd790
JB		 2598static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2599{
05c914fe 2600 if (sdata->vif.type == NL80211_IFTYPE_STATION)
9c6bd790
JB		 2601 queue_work(sdata->local->hw.workqueue,
2602 &sdata->u.sta.work);
2603}
f0706e82 2604
9c6bd790
JB		 2605/* interface setup */
2606void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2607{
9c6bd790 2608 struct ieee80211_if_sta *ifsta;
988c0f72 2609
9c6bd790
JB		 2610 ifsta = &sdata->u.sta;
2611 INIT_WORK(&ifsta->work, ieee80211_sta_work);
c481ec97 2612 INIT_WORK(&ifsta->chswitch_work, ieee80211_chswitch_work);
9c6bd790 2613 setup_timer(&ifsta->timer, ieee80211_sta_timer,
c481ec97
S		 2614 (unsigned long) sdata);
2615 setup_timer(&ifsta->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790
JB		 2616 (unsigned long) sdata);
2617 skb_queue_head_init(&ifsta->skb_queue);
2618
2619 ifsta->capab = WLAN_CAPABILITY_ESS;
2620 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
2621 IEEE80211_AUTH_ALG_SHARED_KEY;
2622 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
2623 IEEE80211_STA_AUTO_BSSID_SEL |
2624 IEEE80211_STA_AUTO_CHANNEL_SEL;
2625 if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4)
2626 ifsta->flags |= IEEE80211_STA_WMM_ENABLED;
f0706e82
JB		 2627}
2628
9c6bd790
JB		 2629/*
2630 * Add a new IBSS station, will also be called by the RX code when,
2631 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2632 * must be callable in atomic context.
2633 */
f698d856 2634struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
881d948c 2635 u8 *bssid,u8 *addr, u32 supp_rates)
f0706e82 2636{
f698d856 2637 struct ieee80211_local *local = sdata->local;
f0706e82 2638 struct sta_info *sta;
87291c02 2639 int band = local->hw.conf.channel->band;
f0706e82
JB		 2640
2641 /* TODO: Could consider removing the least recently used entry and
2642 * allow new one to be added. */
2643 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2644 if (net_ratelimit()) {
2645 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0c68ae26 2646 "entry %pM\n", sdata->dev->name, addr);
f0706e82
JB		 2647 }
2648 return NULL;
2649 }
2650
1e188637 2651 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 2652 return NULL;
2653
f4ea83dd 2654#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0c68ae26
JB		 2655 printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n",
2656 wiphy_name(local->hw.wiphy), addr, sdata->dev->name);
f4ea83dd 2657#endif
f0706e82 2658
73651ee6
JB		 2659 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
2660 if (!sta)
f0706e82
JB		 2661 return NULL;
2662
07346f81 2663 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 2664
8e1535d5 2665 /* make sure mandatory rates are always added */
323ce79a 2666 sta->sta.supp_rates[band] = supp_rates |
96dd22ac 2667 ieee80211_mandatory_rates(local, band);
f0706e82 2668
4b7679a5 2669 rate_control_rate_init(sta);
f0706e82 2670
93e5deb1 2671 if (sta_info_insert(sta))
73651ee6 2672 return NULL;
73651ee6 2673
d0709a65 2674 return sta;
f0706e82
JB		 2675}
2676
9c6bd790
JB		 2677/* configuration hooks */
2678void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
2679 struct ieee80211_if_sta *ifsta)
60f8b39c
JB		 2680{
2681 struct ieee80211_local *local = sdata->local;
60f8b39c 2682
05c914fe 2683 if (sdata->vif.type != NL80211_IFTYPE_STATION)
9c6bd790 2684 return;
60f8b39c 2685
9c6bd790
JB		 2686 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2687 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2688 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2689 IEEE80211_STA_AUTO_SSID_SEL))) {
60f8b39c 2690
9c6bd790
JB		 2691 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
2692 ieee80211_set_disassoc(sdata, ifsta, true, true,
2693 WLAN_REASON_DEAUTH_LEAVING);
60f8b39c 2694
9c6bd790
JB		 2695 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2696 queue_work(local->hw.workqueue, &ifsta->work);
2697 }
2698}
60f8b39c 2699
9c6bd790
JB		 2700int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
2701{
2702 struct ieee80211_if_sta *ifsta;
60f8b39c 2703
9c6bd790
JB		 2704 if (len > IEEE80211_MAX_SSID_LEN)
2705 return -EINVAL;
2706
2707 ifsta = &sdata->u.sta;
2708
2709 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
2710 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
2711 memcpy(ifsta->ssid, ssid, len);
2712 ifsta->ssid_len = len;
60f8b39c 2713 }
60f8b39c 2714
dfe67012
AF		 2715 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2716
9c6bd790
JB		 2717 if (len)
2718 ifsta->flags |= IEEE80211_STA_SSID_SET;
2719 else
2720 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
60f8b39c 2721
dfe67012 2722 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790
JB		 2723 ifsta->ibss_join_req = jiffies;
2724 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
2725 return ieee80211_sta_find_ibss(sdata, ifsta);
2726 }
2727
2728 return 0;
2729}
2730
2731int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
2732{
2733 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2734 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2735 *len = ifsta->ssid_len;
2736 return 0;
2737}
2738
2739int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
2740{
2741 struct ieee80211_if_sta *ifsta;
9c6bd790
JB		 2742
2743 ifsta = &sdata->u.sta;
2744
dfe67012
AF		 2745 if (is_valid_ether_addr(bssid)) {
2746 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2747 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2748 } else {
2749 memset(ifsta->bssid, 0, ETH_ALEN);
2750 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2751 }
2752
2753 if (netif_running(sdata->dev)) {
2754 if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) {
9c6bd790
JB		 2755 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2756 "the low-level driver\n", sdata->dev->name);
9c6bd790
JB		 2757 }
2758 }
60f8b39c 2759
dfe67012 2760 return ieee80211_sta_set_ssid(sdata, ifsta->ssid, ifsta->ssid_len);
9c6bd790
JB		 2761}
2762
2763int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
2764{
2765 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2766
2767 kfree(ifsta->extra_ie);
2768 if (len == 0) {
2769 ifsta->extra_ie = NULL;
2770 ifsta->extra_ie_len = 0;
60f8b39c 2771 return 0;
60f8b39c 2772 }
9c6bd790
JB		 2773 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
2774 if (!ifsta->extra_ie) {
2775 ifsta->extra_ie_len = 0;
2776 return -ENOMEM;
2777 }
2778 memcpy(ifsta->extra_ie, ie, len);
2779 ifsta->extra_ie_len = len;
2780 return 0;
60f8b39c
JB		 2781}
2782
f698d856 2783int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2784{
f0706e82
JB		 2785 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2786
f4ea83dd 2787 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 2788 sdata->dev->name, reason);
f0706e82 2789
05c914fe
JB		 2790 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
2791 sdata->vif.type != NL80211_IFTYPE_ADHOC)
f0706e82
JB		 2792 return -EINVAL;
2793
aa458d17 2794 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 2795 return 0;
2796}
2797
f698d856 2798int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 2799{
f0706e82
JB		 2800 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2801
f4ea83dd 2802 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 2803 sdata->dev->name, reason);
f0706e82 2804
05c914fe 2805 if (sdata->vif.type != NL80211_IFTYPE_STATION)
f0706e82
JB		 2806 return -EINVAL;
2807
d6f2da5b 2808 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 2809 return -1;
2810
aa458d17 2811 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 2812 return 0;
2813}
84363e6e 2814
9c6bd790
JB		 2815/* scan finished notification */
2816void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
2817{
2818 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
2819 struct ieee80211_if_sta *ifsta;
2820
05c914fe 2821 if (sdata && sdata->vif.type == NL80211_IFTYPE_ADHOC) {
9c6bd790 2822 ifsta = &sdata->u.sta;
c0415b54
AF		 2823 if ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
2824 !ieee80211_sta_active_ibss(sdata))
9c6bd790
JB		 2825 ieee80211_sta_find_ibss(sdata, ifsta);
2826 }
2827
2828 /* Restart STA timers */
2829 rcu_read_lock();
2830 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2831 ieee80211_restart_sta_timer(sdata);
2832 rcu_read_unlock();
2833}
520eb820
KV		 2834
2835void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
2836{
2837 struct ieee80211_local *local =
2838 container_of(work, struct ieee80211_local,
2839 dynamic_ps_disable_work);
2840
2841 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2842 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2843 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2844 }
2845
2846 ieee80211_wake_queues_by_reason(&local->hw,
2847 IEEE80211_QUEUE_STOP_REASON_PS);
2848}
2849
2850void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
2851{
2852 struct ieee80211_local *local =
2853 container_of(work, struct ieee80211_local,
2854 dynamic_ps_enable_work);
a97b77b9 2855 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
520eb820
KV		 2856
2857 if (local->hw.conf.flags & IEEE80211_CONF_PS)
2858 return;
2859
4be8c387
JB		 2860 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
2861 ieee80211_send_nullfunc(local, sdata, 1);
520eb820 2862
4be8c387 2863 local->hw.conf.flags |= IEEE80211_CONF_PS;
520eb820
KV		 2864 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2865}
2866
2867void ieee80211_dynamic_ps_timer(unsigned long data)
2868{
2869 struct ieee80211_local *local = (void *) data;
2870
2871 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
2872}
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