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mac80211: generalise management work a bit
[GitHub/mt8127/android_kernel_alcatel_ttab.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 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82
JB		 29
30#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31#define IEEE80211_AUTH_MAX_TRIES 3
32#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33#define IEEE80211_ASSOC_MAX_TRIES 3
a43abf29 34#define IEEE80211_MAX_PROBE_TRIES 5
b291ba11
JB		 35
36/*
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
39 */
40#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
41/*
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
44 */
d1c5091f 45#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 46/*
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
50 */
d1c5091f 51#define IEEE80211_PROBE_WAIT (HZ / 2)
f0706e82 52
5bb644a0
JB		 53#define TMR_RUNNING_TIMER 0
54#define TMR_RUNNING_CHANSW 1
55
77fdaa12
JB		 56/*
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
61 */
62enum rx_mgmt_action {
63 /* no action required */
64 RX_MGMT_NONE,
65
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH,
68
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC,
71
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH,
74
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC,
77
5d1ec85f
JB		 78 /* caller must tell cfg80211 about internal error */
79 RX_MGMT_CFG80211_ASSOC_ERROR,
80
77fdaa12
JB		 81 /* caller must call cfg80211_auth_timeout() & free work */
82 RX_MGMT_CFG80211_AUTH_TO,
83
84 /* caller must call cfg80211_assoc_timeout() & free work */
85 RX_MGMT_CFG80211_ASSOC_TO,
86};
87
5484e237 88/* utils */
77fdaa12
JB		 89static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
90{
91 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
92}
93
ca386f31
JB		 94/*
95 * We can have multiple work items (and connection probing)
96 * scheduling this timer, but we need to take care to only
97 * reschedule it when it should fire _earlier_ than it was
98 * asked for before, or if it's not pending right now. This
99 * function ensures that. Note that it then is required to
100 * run this function for all timeouts after the first one
101 * has happened -- the work that runs from this timer will
102 * do that.
103 */
104static void run_again(struct ieee80211_if_managed *ifmgd,
105 unsigned long timeout)
106{
107 ASSERT_MGD_MTX(ifmgd);
108
109 if (!timer_pending(&ifmgd->timer) ||
110 time_before(timeout, ifmgd->timer.expires))
111 mod_timer(&ifmgd->timer, timeout);
112}
113
b291ba11
JB		 114static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
115{
116 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
117 return;
118
119 mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
121}
122
5484e237 123static int ecw2cw(int ecw)
60f8b39c 124{
5484e237 125 return (1 << ecw) - 1;
60f8b39c
JB		 126}
127
f679f65d 128static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
9ac19a90 129 struct ieee80211_supported_band *sband,
881d948c 130 u32 *rates)
9ac19a90
JB		 131{
132 int i, j, count;
133 *rates = 0;
134 count = 0;
f679f65d
JB		 135 for (i = 0; i < supp_rates_len; i++) {
136 int rate = (supp_rates[i] & 0x7F) * 5;
9ac19a90
JB		 137
138 for (j = 0; j < sband->n_bitrates; j++)
139 if (sband->bitrates[j].bitrate == rate) {
140 *rates |= BIT(j);
141 count++;
142 break;
143 }
144 }
145
146 return count;
147}
148
d5522e03
JB		 149/*
150 * ieee80211_enable_ht should be called only after the operating band
151 * has been determined as ht configuration depends on the hw's
152 * HT abilities for a specific band.
153 */
154static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
155 struct ieee80211_ht_info *hti,
77fdaa12 156 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 157{
158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_supported_band *sband;
d5522e03
JB		 160 struct sta_info *sta;
161 u32 changed = 0;
9ed6bcce 162 u16 ht_opmode;
d5522e03
JB		 163 bool enable_ht = true, ht_changed;
164 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
165
166 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
167
d5522e03
JB		 168 /* HT is not supported */
169 if (!sband->ht_cap.ht_supported)
170 enable_ht = false;
171
172 /* check that channel matches the right operating channel */
173 if (local->hw.conf.channel->center_freq !=
174 ieee80211_channel_to_frequency(hti->control_chan))
175 enable_ht = false;
176
177 if (enable_ht) {
178 channel_type = NL80211_CHAN_HT20;
179
180 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
181 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
182 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
183 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
184 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 185 if (!(local->hw.conf.channel->flags &
186 IEEE80211_CHAN_NO_HT40PLUS))
187 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 188 break;
189 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 190 if (!(local->hw.conf.channel->flags &
191 IEEE80211_CHAN_NO_HT40MINUS))
192 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 193 break;
194 }
195 }
196 }
197
198 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
199 channel_type != local->hw.conf.channel_type;
200
201 local->oper_channel_type = channel_type;
202
203 if (ht_changed) {
204 /* channel_type change automatically detected */
205 ieee80211_hw_config(local, 0);
206
207 rcu_read_lock();
abe60632 208 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 209 if (sta)
210 rate_control_rate_update(local, sband, sta,
211 IEEE80211_RC_HT_CHANGED);
d5522e03 212 rcu_read_unlock();
d5522e03
JB		 213 }
214
215 /* disable HT */
216 if (!enable_ht)
217 return 0;
218
9ed6bcce 219 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 220
221 /* if bss configuration changed store the new one */
413ad50a
JB		 222 if (!sdata->ht_opmode_valid ||
223 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 224 changed |= BSS_CHANGED_HT;
9ed6bcce 225 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 226 sdata->ht_opmode_valid = true;
d5522e03
JB		 227 }
228
229 return changed;
230}
231
9c6bd790
JB		 232/* frame sending functions */
233
77fdaa12 234static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f679f65d 235 struct ieee80211_work *wk)
9ac19a90 236{
46900298 237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 238 struct ieee80211_local *local = sdata->local;
239 struct sk_buff *skb;
240 struct ieee80211_mgmt *mgmt;
517357c6
JB		 241 u8 *pos;
242 const u8 *ies, *ht_ie;
9ac19a90
JB		 243 int i, len, count, rates_len, supp_rates_len;
244 u16 capab;
9ac19a90
JB		 245 int wmm = 0;
246 struct ieee80211_supported_band *sband;
881d948c 247 u32 rates = 0;
9ac19a90
JB		 248
249 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12 250 sizeof(*mgmt) + 200 + wk->ie_len +
f679f65d 251 wk->assoc.ssid_len);
9ac19a90
JB		 252 if (!skb) {
253 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
47846c9b 254 "frame\n", sdata->name);
9ac19a90
JB		 255 return;
256 }
257 skb_reserve(skb, local->hw.extra_tx_headroom);
258
259 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
260
46900298 261 capab = ifmgd->capab;
9ac19a90
JB		 262
263 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
266 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
267 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
268 }
269
f679f65d 270 if (wk->assoc.capability & WLAN_CAPABILITY_PRIVACY)
77fdaa12 271 capab |= WLAN_CAPABILITY_PRIVACY;
f679f65d 272 if (wk->assoc.wmm_used)
77fdaa12 273 wmm = 1;
9ac19a90 274
77fdaa12
JB		 275 /* get all rates supported by the device and the AP as
276 * some APs don't like getting a superset of their rates
277 * in the association request (e.g. D-Link DAP 1353 in
278 * b-only mode) */
f679f65d
JB		 279 rates_len = ieee80211_compatible_rates(wk->assoc.supp_rates,
280 wk->assoc.supp_rates_len,
281 sband, &rates);
9ac19a90 282
f679f65d 283 if ((wk->assoc.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
77fdaa12
JB		 284 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
285 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 286
287 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
288 memset(mgmt, 0, 24);
f679f65d 289 memcpy(mgmt->da, wk->assoc.bssid, ETH_ALEN);
47846c9b 290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
f679f65d 291 memcpy(mgmt->bssid, wk->assoc.bssid, ETH_ALEN);
9ac19a90 292
f679f65d 293 if (!is_zero_ether_addr(wk->assoc.prev_bssid)) {
9ac19a90
JB		 294 skb_put(skb, 10);
295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
296 IEEE80211_STYPE_REASSOC_REQ);
297 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
298 mgmt->u.reassoc_req.listen_interval =
299 cpu_to_le16(local->hw.conf.listen_interval);
f679f65d 300 memcpy(mgmt->u.reassoc_req.current_ap, wk->assoc.prev_bssid,
9ac19a90
JB		 301 ETH_ALEN);
302 } else {
303 skb_put(skb, 4);
304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
305 IEEE80211_STYPE_ASSOC_REQ);
306 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 307 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 308 cpu_to_le16(local->hw.conf.listen_interval);
309 }
310
311 /* SSID */
f679f65d 312 ies = pos = skb_put(skb, 2 + wk->assoc.ssid_len);
9ac19a90 313 *pos++ = WLAN_EID_SSID;
f679f65d
JB		 314 *pos++ = wk->assoc.ssid_len;
315 memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len);
9ac19a90
JB		 316
317 /* add all rates which were marked to be used above */
318 supp_rates_len = rates_len;
319 if (supp_rates_len > 8)
320 supp_rates_len = 8;
321
322 len = sband->n_bitrates;
323 pos = skb_put(skb, supp_rates_len + 2);
324 *pos++ = WLAN_EID_SUPP_RATES;
325 *pos++ = supp_rates_len;
326
327 count = 0;
328 for (i = 0; i < sband->n_bitrates; i++) {
329 if (BIT(i) & rates) {
330 int rate = sband->bitrates[i].bitrate;
331 *pos++ = (u8) (rate / 5);
332 if (++count == 8)
333 break;
334 }
335 }
336
337 if (rates_len > count) {
338 pos = skb_put(skb, rates_len - count + 2);
339 *pos++ = WLAN_EID_EXT_SUPP_RATES;
340 *pos++ = rates_len - count;
341
342 for (i++; i < sband->n_bitrates; i++) {
343 if (BIT(i) & rates) {
344 int rate = sband->bitrates[i].bitrate;
345 *pos++ = (u8) (rate / 5);
346 }
347 }
348 }
349
350 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
351 /* 1. power capabilities */
352 pos = skb_put(skb, 4);
353 *pos++ = WLAN_EID_PWR_CAPABILITY;
354 *pos++ = 2;
355 *pos++ = 0; /* min tx power */
356 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
357
358 /* 2. supported channels */
359 /* TODO: get this in reg domain format */
360 pos = skb_put(skb, 2 * sband->n_channels + 2);
361 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
362 *pos++ = 2 * sband->n_channels;
363 for (i = 0; i < sband->n_channels; i++) {
364 *pos++ = ieee80211_frequency_to_channel(
365 sband->channels[i].center_freq);
366 *pos++ = 1; /* one channel in the subband*/
367 }
368 }
369
77fdaa12
JB		 370 if (wk->ie_len && wk->ie) {
371 pos = skb_put(skb, wk->ie_len);
372 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 373 }
374
46900298 375 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 376 pos = skb_put(skb, 9);
377 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
378 *pos++ = 7; /* len */
379 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
380 *pos++ = 0x50;
381 *pos++ = 0xf2;
382 *pos++ = 2; /* WME */
383 *pos++ = 0; /* WME info */
384 *pos++ = 1; /* WME ver */
385 *pos++ = 0;
386 }
387
388 /* wmm support is a must to HT */
eb46936b
VT		 389 /*
390 * IEEE802.11n does not allow TKIP/WEP as pairwise
391 * ciphers in HT mode. We still associate in non-ht
392 * mode (11a/b/g) if any one of these ciphers is
393 * configured as pairwise.
394 */
46900298 395 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 396 sband->ht_cap.ht_supported &&
f679f65d 397 (ht_ie = wk->assoc.ht_information_ie) &&
eb46936b 398 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 399 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 400 struct ieee80211_ht_info *ht_info =
401 (struct ieee80211_ht_info *)(ht_ie + 2);
402 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 403 __le16 tmp;
404 u32 flags = local->hw.conf.channel->flags;
405
0f78231b
JB		 406 /* determine capability flags */
407
f38fd12f
JB		 408 if (ieee80211_disable_40mhz_24ghz &&
409 sband->band == IEEE80211_BAND_2GHZ) {
410 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
411 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 }
413
d9fe60de
JB		 414 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
415 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 416 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 417 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 418 cap &= ~IEEE80211_HT_CAP_SGI_40;
419 }
420 break;
d9fe60de 421 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 422 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 423 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 424 cap &= ~IEEE80211_HT_CAP_SGI_40;
425 }
426 break;
427 }
428
0f78231b
JB		 429 /* set SM PS mode properly */
430 cap &= ~IEEE80211_HT_CAP_SM_PS;
431 /* new association always uses requested smps mode */
432 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
433 if (ifmgd->powersave)
434 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
435 else
436 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
437 } else
438 ifmgd->ap_smps = ifmgd->req_smps;
439
440 switch (ifmgd->ap_smps) {
441 case IEEE80211_SMPS_AUTOMATIC:
442 case IEEE80211_SMPS_NUM_MODES:
443 WARN_ON(1);
444 case IEEE80211_SMPS_OFF:
445 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
446 IEEE80211_HT_CAP_SM_PS_SHIFT;
447 break;
448 case IEEE80211_SMPS_STATIC:
449 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
450 IEEE80211_HT_CAP_SM_PS_SHIFT;
451 break;
452 case IEEE80211_SMPS_DYNAMIC:
453 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
454 IEEE80211_HT_CAP_SM_PS_SHIFT;
455 break;
456 }
457
458 /* reserve and fill IE */
459
460 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
9ac19a90
JB		 461 *pos++ = WLAN_EID_HT_CAPABILITY;
462 *pos++ = sizeof(struct ieee80211_ht_cap);
463 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
0f78231b
JB		 464
465 /* capability flags */
466 tmp = cpu_to_le16(cap);
9ac19a90
JB		 467 memcpy(pos, &tmp, sizeof(u16));
468 pos += sizeof(u16);
0f78231b
JB		 469
470 /* AMPDU parameters */
d9fe60de 471 *pos++ = sband->ht_cap.ampdu_factor |
0f78231b
JB		 472 (sband->ht_cap.ampdu_density <<
473 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
474
475 /* MCS set */
d9fe60de 476 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
0f78231b
JB		 477 pos += sizeof(sband->ht_cap.mcs);
478
479 /* extended capabilities */
480 pos += sizeof(__le16);
481
482 /* BF capabilities */
483 pos += sizeof(__le32);
484
485 /* antenna selection */
486 pos += sizeof(u8);
9ac19a90
JB		 487 }
488
62ae67be
JB		 489 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
490 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 491}
492
493
ef422bc0 494static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 495 const u8 *bssid, u16 stype, u16 reason,
496 void *cookie)
9ac19a90
JB		 497{
498 struct ieee80211_local *local = sdata->local;
46900298 499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 500 struct sk_buff *skb;
501 struct ieee80211_mgmt *mgmt;
9aed3cc1 502
65fc73ac 503 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 504 if (!skb) {
ef422bc0 505 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 506 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 507 return;
508 }
509 skb_reserve(skb, local->hw.extra_tx_headroom);
510
511 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
512 memset(mgmt, 0, 24);
77fdaa12 513 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 514 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 515 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 516 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 517 skb_put(skb, 2);
ef422bc0 518 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 519 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
520
53b46b84 521 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 522 if (cookie)
523 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
524 else
525 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 526 else
ce470613
HS		 527 if (cookie)
528 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
529 else
530 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 531 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
532 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
533 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 534}
535
572e0012
KV		 536void ieee80211_send_pspoll(struct ieee80211_local *local,
537 struct ieee80211_sub_if_data *sdata)
538{
46900298 539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 540 struct ieee80211_pspoll *pspoll;
541 struct sk_buff *skb;
542 u16 fc;
543
544 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
545 if (!skb) {
546 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 547 "pspoll frame\n", sdata->name);
572e0012
KV		 548 return;
549 }
550 skb_reserve(skb, local->hw.extra_tx_headroom);
551
552 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
553 memset(pspoll, 0, sizeof(*pspoll));
554 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
555 pspoll->frame_control = cpu_to_le16(fc);
46900298 556 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 557
558 /* aid in PS-Poll has its two MSBs each set to 1 */
559 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
560
46900298 561 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
47846c9b 562 memcpy(pspoll->ta, sdata->vif.addr, ETH_ALEN);
572e0012 563
62ae67be
JB		 564 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
565 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 566}
567
965bedad
JB		 568void ieee80211_send_nullfunc(struct ieee80211_local *local,
569 struct ieee80211_sub_if_data *sdata,
570 int powersave)
571{
572 struct sk_buff *skb;
573 struct ieee80211_hdr *nullfunc;
574 __le16 fc;
575
576 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
577 return;
578
579 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
580 if (!skb) {
581 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
47846c9b 582 "frame\n", sdata->name);
965bedad
JB		 583 return;
584 }
585 skb_reserve(skb, local->hw.extra_tx_headroom);
586
587 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
588 memset(nullfunc, 0, 24);
589 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
590 IEEE80211_FCTL_TODS);
591 if (powersave)
592 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
593 nullfunc->frame_control = fc;
594 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 595 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
965bedad
JB		 596 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
597
62ae67be
JB		 598 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
599 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 600}
601
cc32abd4
JB		 602/* spectrum management related things */
603static void ieee80211_chswitch_work(struct work_struct *work)
604{
605 struct ieee80211_sub_if_data *sdata =
606 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
608
9607e6b6 609 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 610 return;
611
77fdaa12
JB		 612 mutex_lock(&ifmgd->mtx);
613 if (!ifmgd->associated)
614 goto out;
cc32abd4
JB		 615
616 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 617 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
618
cc32abd4 619 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 620 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 621
cc32abd4
JB		 622 ieee80211_wake_queues_by_reason(&sdata->local->hw,
623 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 624 out:
625 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
626 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 627}
628
629static void ieee80211_chswitch_timer(unsigned long data)
630{
631 struct ieee80211_sub_if_data *sdata =
632 (struct ieee80211_sub_if_data *) data;
633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
634
5bb644a0
JB		 635 if (sdata->local->quiescing) {
636 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
637 return;
638 }
639
42935eca 640 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 641}
642
643void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
644 struct ieee80211_channel_sw_ie *sw_elem,
645 struct ieee80211_bss *bss)
646{
647 struct ieee80211_channel *new_ch;
648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
649 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
650
77fdaa12
JB		 651 ASSERT_MGD_MTX(ifmgd);
652
653 if (!ifmgd->associated)
cc32abd4
JB		 654 return;
655
fbe9c429 656 if (sdata->local->scanning)
cc32abd4
JB		 657 return;
658
659 /* Disregard subsequent beacons if we are already running a timer
660 processing a CSA */
661
662 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
663 return;
664
665 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
666 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
667 return;
668
669 sdata->local->csa_channel = new_ch;
670
671 if (sw_elem->count <= 1) {
42935eca 672 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 673 } else {
674 ieee80211_stop_queues_by_reason(&sdata->local->hw,
675 IEEE80211_QUEUE_STOP_REASON_CSA);
676 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
677 mod_timer(&ifmgd->chswitch_timer,
678 jiffies +
679 msecs_to_jiffies(sw_elem->count *
680 bss->cbss.beacon_interval));
681 }
682}
683
684static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
685 u16 capab_info, u8 *pwr_constr_elem,
686 u8 pwr_constr_elem_len)
687{
688 struct ieee80211_conf *conf = &sdata->local->hw.conf;
689
690 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
691 return;
692
693 /* Power constraint IE length should be 1 octet */
694 if (pwr_constr_elem_len != 1)
695 return;
696
697 if ((*pwr_constr_elem <= conf->channel->max_power) &&
698 (*pwr_constr_elem != sdata->local->power_constr_level)) {
699 sdata->local->power_constr_level = *pwr_constr_elem;
700 ieee80211_hw_config(sdata->local, 0);
701 }
702}
703
965bedad
JB		 704/* powersave */
705static void ieee80211_enable_ps(struct ieee80211_local *local,
706 struct ieee80211_sub_if_data *sdata)
707{
708 struct ieee80211_conf *conf = &local->hw.conf;
709
d5edaedc
JB		 710 /*
711 * If we are scanning right now then the parameters will
712 * take effect when scan finishes.
713 */
fbe9c429 714 if (local->scanning)
d5edaedc
JB		 715 return;
716
965bedad
JB		 717 if (conf->dynamic_ps_timeout > 0 &&
718 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
719 mod_timer(&local->dynamic_ps_timer, jiffies +
720 msecs_to_jiffies(conf->dynamic_ps_timeout));
721 } else {
722 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
723 ieee80211_send_nullfunc(local, sdata, 1);
724 conf->flags |= IEEE80211_CONF_PS;
725 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
726 }
727}
728
729static void ieee80211_change_ps(struct ieee80211_local *local)
730{
731 struct ieee80211_conf *conf = &local->hw.conf;
732
733 if (local->ps_sdata) {
965bedad
JB		 734 ieee80211_enable_ps(local, local->ps_sdata);
735 } else if (conf->flags & IEEE80211_CONF_PS) {
736 conf->flags &= ~IEEE80211_CONF_PS;
737 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
738 del_timer_sync(&local->dynamic_ps_timer);
739 cancel_work_sync(&local->dynamic_ps_enable_work);
740 }
741}
742
743/* need to hold RTNL or interface lock */
10f644a4 744void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 745{
746 struct ieee80211_sub_if_data *sdata, *found = NULL;
747 int count = 0;
748
749 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
750 local->ps_sdata = NULL;
751 return;
752 }
753
754 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 755 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 756 continue;
757 if (sdata->vif.type != NL80211_IFTYPE_STATION)
758 continue;
759 found = sdata;
760 count++;
761 }
762
43f78531 763 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 764 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 765 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
766 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 767 s32 beaconint_us;
768
769 if (latency < 0)
770 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
771
772 beaconint_us = ieee80211_tu_to_usec(
773 found->vif.bss_conf.beacon_int);
774
04fe2037 775 if (beaconint_us > latency) {
10f644a4 776 local->ps_sdata = NULL;
04fe2037
JB		 777 } else {
778 u8 dtimper = found->vif.bss_conf.dtim_period;
779 int maxslp = 1;
780
781 if (dtimper > 1)
782 maxslp = min_t(int, dtimper,
783 latency / beaconint_us);
784
9ccebe61 785 local->hw.conf.max_sleep_period = maxslp;
10f644a4 786 local->ps_sdata = found;
04fe2037 787 }
10f644a4 788 } else {
965bedad 789 local->ps_sdata = NULL;
10f644a4 790 }
965bedad
JB		 791
792 ieee80211_change_ps(local);
793}
794
795void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
796{
797 struct ieee80211_local *local =
798 container_of(work, struct ieee80211_local,
799 dynamic_ps_disable_work);
800
801 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
802 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
803 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
804 }
805
806 ieee80211_wake_queues_by_reason(&local->hw,
807 IEEE80211_QUEUE_STOP_REASON_PS);
808}
809
810void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
811{
812 struct ieee80211_local *local =
813 container_of(work, struct ieee80211_local,
814 dynamic_ps_enable_work);
815 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
816
817 /* can only happen when PS was just disabled anyway */
818 if (!sdata)
819 return;
820
821 if (local->hw.conf.flags & IEEE80211_CONF_PS)
822 return;
823
824 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
825 ieee80211_send_nullfunc(local, sdata, 1);
826
827 local->hw.conf.flags |= IEEE80211_CONF_PS;
828 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
829}
830
831void ieee80211_dynamic_ps_timer(unsigned long data)
832{
833 struct ieee80211_local *local = (void *) data;
834
78f1a8b7 835 if (local->quiescing || local->suspended)
5bb644a0
JB		 836 return;
837
42935eca 838 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 839}
840
60f8b39c 841/* MLME */
f698d856 842static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 843 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 844 u8 *wmm_param, size_t wmm_param_len)
845{
f0706e82
JB		 846 struct ieee80211_tx_queue_params params;
847 size_t left;
848 int count;
849 u8 *pos;
850
46900298 851 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 852 return;
853
854 if (!wmm_param)
855 return;
856
f0706e82
JB		 857 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
858 return;
859 count = wmm_param[6] & 0x0f;
46900298 860 if (count == ifmgd->wmm_last_param_set)
f0706e82 861 return;
46900298 862 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 863
864 pos = wmm_param + 8;
865 left = wmm_param_len - 8;
866
867 memset(&params, 0, sizeof(params));
868
f0706e82
JB		 869 local->wmm_acm = 0;
870 for (; left >= 4; left -= 4, pos += 4) {
871 int aci = (pos[0] >> 5) & 0x03;
872 int acm = (pos[0] >> 4) & 0x01;
873 int queue;
874
875 switch (aci) {
0eeb59fe 876 case 1: /* AC_BK */
e100bb64 877 queue = 3;
988c0f72 878 if (acm)
0eeb59fe 879 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 880 break;
0eeb59fe 881 case 2: /* AC_VI */
e100bb64 882 queue = 1;
988c0f72 883 if (acm)
0eeb59fe 884 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 885 break;
0eeb59fe 886 case 3: /* AC_VO */
e100bb64 887 queue = 0;
988c0f72 888 if (acm)
0eeb59fe 889 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 890 break;
0eeb59fe 891 case 0: /* AC_BE */
f0706e82 892 default:
e100bb64 893 queue = 2;
988c0f72 894 if (acm)
0eeb59fe 895 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 896 break;
897 }
898
899 params.aifs = pos[0] & 0x0f;
900 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
901 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 902 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 903#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 904 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 905 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 906 wiphy_name(local->hw.wiphy), queue, aci, acm,
907 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 908#endif
24487981 909 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 910 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 911 "parameters for queue %d\n",
912 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 913 }
914}
915
7a5158ef
JB		 916static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
917 u16 capab, bool erp_valid, u8 erp)
5628221c 918{
bda3933a 919 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 920 u32 changed = 0;
7a5158ef
JB		 921 bool use_protection;
922 bool use_short_preamble;
923 bool use_short_slot;
924
925 if (erp_valid) {
926 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
927 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
928 } else {
929 use_protection = false;
930 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
931 }
932
933 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 934
471b3efd 935 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 936 bss_conf->use_cts_prot = use_protection;
937 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 938 }
7e9ed188 939
d43c7b37 940 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 941 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 942 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 943 }
d9430a32 944
7a5158ef 945 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 946 bss_conf->use_short_slot = use_short_slot;
947 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 948 }
949
950 return changed;
951}
952
f698d856 953static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
63f170e0 954 struct ieee80211_bss *bss,
ae5eb026 955 u32 bss_info_changed)
f0706e82 956{
471b3efd 957 struct ieee80211_local *local = sdata->local;
d6f2da5b 958
ae5eb026 959 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 960 /* set timing information */
961 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
962 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
963 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 964
77fdaa12
JB		 965 bss_info_changed |= BSS_CHANGED_BEACON_INT;
966 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
967 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 968
77fdaa12
JB		 969 sdata->u.mgd.associated = bss;
970 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 971
b291ba11
JB		 972 /* just to be sure */
973 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
974 IEEE80211_STA_BEACON_POLL);
975
0183826b
JB		 976 /*
977 * Always handle WMM once after association regardless
978 * of the first value the AP uses. Setting -1 here has
979 * that effect because the AP values is an unsigned
980 * 4-bit value.
981 */
982 sdata->u.mgd.wmm_last_param_set = -1;
983
9ac19a90 984 ieee80211_led_assoc(local, 1);
9306102e 985
bda3933a 986 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 987 /*
988 * For now just always ask the driver to update the basic rateset
989 * when we have associated, we aren't checking whether it actually
990 * changed or not.
991 */
ae5eb026 992 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 993
994 /* And the BSSID changed - we're associated now */
995 bss_info_changed |= BSS_CHANGED_BSSID;
996
ae5eb026 997 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 998
056508dc
JB		 999 mutex_lock(&local->iflist_mtx);
1000 ieee80211_recalc_ps(local, -1);
0f78231b 1001 ieee80211_recalc_smps(local, sdata);
056508dc 1002 mutex_unlock(&local->iflist_mtx);
e0cb686f 1003
53623f1a 1004 netif_start_queue(sdata->dev);
9ac19a90 1005 netif_carrier_on(sdata->dev);
f0706e82
JB		 1006}
1007
f679f65d
JB		 1008static void ieee80211_remove_auth_bss(struct ieee80211_local *local,
1009 struct ieee80211_work *wk)
1010{
1011 struct cfg80211_bss *cbss;
1012 u16 capa_val = WLAN_CAPABILITY_ESS;
1013
1014 if (wk->auth.privacy)
1015 capa_val |= WLAN_CAPABILITY_PRIVACY;
1016
1017 cbss = cfg80211_get_bss(local->hw.wiphy, wk->chan, wk->auth.bssid,
1018 wk->auth.ssid, wk->auth.ssid_len,
1019 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
1020 capa_val);
1021 if (!cbss)
1022 return;
1023
1024 cfg80211_unlink_bss(local->hw.wiphy, cbss);
1025 cfg80211_put_bss(cbss);
1026}
1027
77fdaa12
JB		 1028static enum rx_mgmt_action __must_check
1029ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
f679f65d 1030 struct ieee80211_work *wk)
f0706e82 1031{
46900298 1032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1033 struct ieee80211_local *local = sdata->local;
46900298 1034
f679f65d
JB		 1035 wk->auth.tries++;
1036 if (wk->auth.tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1037 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
f679f65d 1038 sdata->name, wk->auth.bssid);
7a947080
VT		 1039
1040 /*
1041 * Most likely AP is not in the range so remove the
77fdaa12 1042 * bss struct for that AP.
7a947080 1043 */
f679f65d 1044 ieee80211_remove_auth_bss(local, wk);
11432379
HS		 1045
1046 /*
1047 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1048 * due to work needing to be done. Hence, queue the STAs work
1049 * again for that.
11432379 1050 */
42935eca 1051 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1052 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1053 }
f0706e82 1054
77fdaa12 1055 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
f679f65d 1056 sdata->name, wk->auth.bssid, wk->auth.tries);
f0706e82 1057
77fdaa12
JB		 1058 /*
1059 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 1060 * will not answer to direct packet in unassociated state.
1061 */
f679f65d
JB		 1062 ieee80211_send_probe_req(sdata, NULL, wk->auth.ssid, wk->auth.ssid_len,
1063 NULL, 0);
77fdaa12
JB		 1064
1065 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1066 run_again(ifmgd, wk->timeout);
9ac19a90 1067
77fdaa12 1068 return RX_MGMT_NONE;
60f8b39c 1069}
f0706e82 1070
9ac19a90 1071
77fdaa12
JB		 1072static enum rx_mgmt_action __must_check
1073ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f679f65d 1074 struct ieee80211_work *wk)
f0706e82 1075{
46900298 1076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1077 struct ieee80211_local *local = sdata->local;
46900298 1078
f679f65d
JB		 1079 wk->auth.tries++;
1080 if (wk->auth.tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1081 printk(KERN_DEBUG "%s: authentication with AP %pM"
f679f65d 1082 " timed out\n", sdata->name, wk->auth.bssid);
77fdaa12
JB		 1083
1084 /*
1085 * Most likely AP is not in the range so remove the
1086 * bss struct for that AP.
1087 */
f679f65d 1088 ieee80211_remove_auth_bss(local, wk);
11432379
HS		 1089
1090 /*
1091 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1092 * due to work needing to be done. Hence, queue the STAs work
1093 * again for that.
11432379 1094 */
42935eca 1095 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1096 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1097 }
f0706e82 1098
77fdaa12 1099 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
f679f65d 1100 sdata->name, wk->auth.bssid, wk->auth.tries);
77fdaa12 1101
f679f65d
JB		 1102 ieee80211_send_auth(sdata, 1, wk->auth.algorithm, wk->ie, wk->ie_len,
1103 wk->auth.bssid, NULL, 0, 0);
1104 wk->auth.transaction = 2;
f0706e82 1105
77fdaa12 1106 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1107 run_again(ifmgd, wk->timeout);
9ac19a90 1108
77fdaa12 1109 return RX_MGMT_NONE;
f0706e82
JB		 1110}
1111
63f170e0 1112static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 1113{
46900298 1114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1115 struct ieee80211_local *local = sdata->local;
1116 struct sta_info *sta;
e0cb686f 1117 u32 changed = 0, config_changed = 0;
b291ba11 1118 u8 bssid[ETH_ALEN];
aa458d17 1119
77fdaa12
JB		 1120 ASSERT_MGD_MTX(ifmgd);
1121
b291ba11
JB		 1122 if (WARN_ON(!ifmgd->associated))
1123 return;
1124
1125 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1126
77fdaa12
JB		 1127 ifmgd->associated = NULL;
1128 memset(ifmgd->bssid, 0, ETH_ALEN);
1129
1130 /*
1131 * we need to commit the associated = NULL change because the
1132 * scan code uses that to determine whether this iface should
1133 * go to/wake up from powersave or not -- and could otherwise
1134 * wake the queues erroneously.
1135 */
1136 smp_mb();
1137
1138 /*
1139 * Thus, we can only afterwards stop the queues -- to account
1140 * for the case where another CPU is finishing a scan at this
1141 * time -- we don't want the scan code to enable queues.
1142 */
aa458d17 1143
53623f1a 1144 netif_stop_queue(sdata->dev);
aa458d17
TW		 1145 netif_carrier_off(sdata->dev);
1146
1fa6f4af 1147 rcu_read_lock();
abe60632 1148 sta = sta_info_get(sdata, bssid);
1fa6f4af
JB		 1149 if (sta)
1150 ieee80211_sta_tear_down_BA_sessions(sta);
1151 rcu_read_unlock();
aa458d17 1152
f5e5bf25
TW		 1153 changed |= ieee80211_reset_erp_info(sdata);
1154
f5e5bf25 1155 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1156 changed |= BSS_CHANGED_ASSOC;
1157 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1158
aa837e1d
JB		 1159 ieee80211_set_wmm_default(sdata);
1160
4797938c 1161 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1162 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1163
413ad50a
JB		 1164 /* on the next assoc, re-program HT parameters */
1165 sdata->ht_opmode_valid = false;
1166
a8302de9
VT		 1167 local->power_constr_level = 0;
1168
520eb820
KV		 1169 del_timer_sync(&local->dynamic_ps_timer);
1170 cancel_work_sync(&local->dynamic_ps_enable_work);
1171
e0cb686f
KV		 1172 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1173 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1174 config_changed |= IEEE80211_CONF_CHANGE_PS;
1175 }
ae5eb026 1176
e0cb686f 1177 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1178
1179 /* And the BSSID changed -- not very interesting here */
1180 changed |= BSS_CHANGED_BSSID;
ae5eb026 1181 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1182
1183 rcu_read_lock();
1184
abe60632 1185 sta = sta_info_get(sdata, bssid);
8e268e47
TW		 1186 if (!sta) {
1187 rcu_read_unlock();
1188 return;
1189 }
1190
1191 sta_info_unlink(&sta);
1192
1193 rcu_read_unlock();
1194
1195 sta_info_destroy(sta);
aa458d17 1196}
f0706e82 1197
77fdaa12
JB		 1198static enum rx_mgmt_action __must_check
1199ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f679f65d 1200 struct ieee80211_work *wk)
f0706e82 1201{
46900298 1202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1203 struct ieee80211_local *local = sdata->local;
46900298 1204
f679f65d
JB		 1205 wk->assoc.tries++;
1206 if (wk->assoc.tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1207 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1208 " timed out\n",
f679f65d 1209 sdata->name, wk->assoc.bssid);
77fdaa12
JB		 1210
1211 /*
1212 * Most likely AP is not in the range so remove the
1213 * bss struct for that AP.
1214 */
f679f65d 1215 cfg80211_unlink_bss(local->hw.wiphy, &wk->assoc.bss->cbss);
77fdaa12 1216
11432379
HS		 1217 /*
1218 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1219 * due to work needing to be done. Hence, queue the STAs work
1220 * again for that.
11432379 1221 */
42935eca 1222 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1223 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1224 }
1225
77fdaa12 1226 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
f679f65d 1227 sdata->name, wk->assoc.bssid, wk->assoc.tries);
77fdaa12
JB		 1228 ieee80211_send_assoc(sdata, wk);
1229
1230 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1231 run_again(ifmgd, wk->timeout);
f0706e82 1232
77fdaa12 1233 return RX_MGMT_NONE;
f0706e82
JB		 1234}
1235
3cf335d5
KV		 1236void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1237 struct ieee80211_hdr *hdr)
1238{
1239 /*
1240 * We can postpone the mgd.timer whenever receiving unicast frames
1241 * from AP because we know that the connection is working both ways
1242 * at that time. But multicast frames (and hence also beacons) must
1243 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1244 * data idle periods for sending the periodic probe request to the
1245 * AP we're connected to.
3cf335d5 1246 */
b291ba11
JB		 1247 if (is_multicast_ether_addr(hdr->addr1))
1248 return;
1249
1250 mod_timer(&sdata->u.mgd.conn_mon_timer,
1251 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1252}
f0706e82 1253
a43abf29
ML		 1254static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1255{
1256 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1257 const u8 *ssid;
1258
1259 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1260 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1261 ssid + 2, ssid[1], NULL, 0);
1262
1263 ifmgd->probe_send_count++;
1264 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1265 run_again(ifmgd, ifmgd->probe_timeout);
1266}
1267
b291ba11
JB		 1268static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1269 bool beacon)
04de8381 1270{
04de8381 1271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1272 bool already = false;
34bfc411 1273
9607e6b6 1274 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1275 return;
1276
91a3bd76
LR		 1277 if (sdata->local->scanning)
1278 return;
1279
77fdaa12
JB		 1280 mutex_lock(&ifmgd->mtx);
1281
1282 if (!ifmgd->associated)
1283 goto out;
1284
a860402d 1285#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1286 if (beacon && net_ratelimit())
1287 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1288 "- sending probe request\n", sdata->name);
a860402d 1289#endif
04de8381 1290
b291ba11
JB		 1291 /*
1292 * The driver/our work has already reported this event or the
1293 * connection monitoring has kicked in and we have already sent
1294 * a probe request. Or maybe the AP died and the driver keeps
1295 * reporting until we disassociate...
1296 *
1297 * In either case we have to ignore the current call to this
1298 * function (except for setting the correct probe reason bit)
1299 * because otherwise we would reset the timer every time and
1300 * never check whether we received a probe response!
1301 */
1302 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1303 IEEE80211_STA_CONNECTION_POLL))
1304 already = true;
1305
1306 if (beacon)
1307 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1308 else
1309 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1310
1311 if (already)
1312 goto out;
1313
4e751843
JB		 1314 mutex_lock(&sdata->local->iflist_mtx);
1315 ieee80211_recalc_ps(sdata->local, -1);
1316 mutex_unlock(&sdata->local->iflist_mtx);
1317
a43abf29
ML		 1318 ifmgd->probe_send_count = 0;
1319 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1320 out:
1321 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1322}
1323
b291ba11
JB		 1324void ieee80211_beacon_loss_work(struct work_struct *work)
1325{
1326 struct ieee80211_sub_if_data *sdata =
1327 container_of(work, struct ieee80211_sub_if_data,
1328 u.mgd.beacon_loss_work);
1329
1330 ieee80211_mgd_probe_ap(sdata, true);
1331}
1332
04de8381
KV		 1333void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1334{
1335 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1336
42935eca 1337 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1338}
1339EXPORT_SYMBOL(ieee80211_beacon_loss);
1340
77fdaa12 1341static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f679f65d 1342 struct ieee80211_work *wk)
f0706e82 1343{
63f170e0
JB		 1344 list_del(&wk->list);
1345 kfree(wk);
47846c9b 1346 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
f0706e82
JB		 1347}
1348
1349
f698d856 1350static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f679f65d 1351 struct ieee80211_work *wk,
f0706e82
JB		 1352 struct ieee80211_mgmt *mgmt,
1353 size_t len)
1354{
1355 u8 *pos;
1356 struct ieee802_11_elems elems;
1357
f0706e82 1358 pos = mgmt->u.auth.variable;
67a4cce4 1359 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1360 if (!elems.challenge)
f0706e82 1361 return;
f679f65d 1362 ieee80211_send_auth(sdata, 3, wk->auth.algorithm,
46900298 1363 elems.challenge - 2, elems.challenge_len + 2,
f679f65d
JB		 1364 wk->auth.bssid, wk->auth.key, wk->auth.key_len,
1365 wk->auth.key_idx);
1366 wk->auth.transaction = 4;
fe3d2c3f
JB		 1367}
1368
77fdaa12
JB		 1369static enum rx_mgmt_action __must_check
1370ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f679f65d 1371 struct ieee80211_work *wk,
77fdaa12 1372 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1373{
f0706e82
JB		 1374 u16 auth_alg, auth_transaction, status_code;
1375
f679f65d 1376 if (wk->type != IEEE80211_WORK_AUTH)
77fdaa12 1377 return RX_MGMT_NONE;
f0706e82 1378
f4ea83dd 1379 if (len < 24 + 6)
77fdaa12 1380 return RX_MGMT_NONE;
f0706e82 1381
f679f65d 1382 if (memcmp(wk->auth.bssid, mgmt->sa, ETH_ALEN) != 0)
77fdaa12 1383 return RX_MGMT_NONE;
f0706e82 1384
f679f65d 1385 if (memcmp(wk->auth.bssid, mgmt->bssid, ETH_ALEN) != 0)
77fdaa12 1386 return RX_MGMT_NONE;
f0706e82
JB		 1387
1388 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1389 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1390 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1391
f679f65d
JB		 1392 if (auth_alg != wk->auth.algorithm ||
1393 auth_transaction != wk->auth.transaction)
77fdaa12 1394 return RX_MGMT_NONE;
f0706e82
JB		 1395
1396 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1397 list_del(&wk->list);
1398 kfree(wk);
1399 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1400 }
1401
f679f65d 1402 switch (wk->auth.algorithm) {
f0706e82
JB		 1403 case WLAN_AUTH_OPEN:
1404 case WLAN_AUTH_LEAP:
636a5d36 1405 case WLAN_AUTH_FT:
77fdaa12
JB		 1406 ieee80211_auth_completed(sdata, wk);
1407 return RX_MGMT_CFG80211_AUTH;
f0706e82 1408 case WLAN_AUTH_SHARED_KEY:
f679f65d 1409 if (wk->auth.transaction == 4) {
77fdaa12
JB		 1410 ieee80211_auth_completed(sdata, wk);
1411 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1412 } else
77fdaa12 1413 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1414 break;
1415 }
77fdaa12
JB		 1416
1417 return RX_MGMT_NONE;
f0706e82
JB		 1418}
1419
1420
77fdaa12
JB		 1421static enum rx_mgmt_action __must_check
1422ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1423 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1424{
46900298 1425 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1426 const u8 *bssid = NULL;
f0706e82
JB		 1427 u16 reason_code;
1428
f4ea83dd 1429 if (len < 24 + 2)
77fdaa12 1430 return RX_MGMT_NONE;
f0706e82 1431
77fdaa12
JB		 1432 ASSERT_MGD_MTX(ifmgd);
1433
63f170e0 1434 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1435
1436 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1437
77fdaa12 1438 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1439 sdata->name, bssid, reason_code);
77fdaa12 1440
63f170e0
JB		 1441 ieee80211_set_disassoc(sdata);
1442 ieee80211_recalc_idle(sdata->local);
f0706e82 1443
77fdaa12 1444 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1445}
1446
1447
77fdaa12
JB		 1448static enum rx_mgmt_action __must_check
1449ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1451{
46900298 1452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1453 u16 reason_code;
1454
f4ea83dd 1455 if (len < 24 + 2)
77fdaa12 1456 return RX_MGMT_NONE;
f0706e82 1457
77fdaa12
JB		 1458 ASSERT_MGD_MTX(ifmgd);
1459
1460 if (WARN_ON(!ifmgd->associated))
1461 return RX_MGMT_NONE;
1462
1463 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1464 return RX_MGMT_NONE;
f0706e82
JB		 1465
1466 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1467
0ff71613 1468 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1469 sdata->name, mgmt->sa, reason_code);
f0706e82 1470
63f170e0 1471 ieee80211_set_disassoc(sdata);
bc83b681 1472 ieee80211_recalc_idle(sdata->local);
77fdaa12 1473 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1474}
1475
1476
77fdaa12
JB		 1477static enum rx_mgmt_action __must_check
1478ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f679f65d 1479 struct ieee80211_work *wk,
77fdaa12
JB		 1480 struct ieee80211_mgmt *mgmt, size_t len,
1481 bool reassoc)
f0706e82 1482{
46900298 1483 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1484 struct ieee80211_local *local = sdata->local;
8318d78a 1485 struct ieee80211_supported_band *sband;
f0706e82 1486 struct sta_info *sta;
f679f65d 1487 struct ieee80211_bss *bss = wk->assoc.bss;
881d948c 1488 u32 rates, basic_rates;
f0706e82
JB		 1489 u16 capab_info, status_code, aid;
1490 struct ieee802_11_elems elems;
bda3933a 1491 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1492 u8 *pos;
ae5eb026 1493 u32 changed = 0;
5d1ec85f
JB		 1494 int i, j, err;
1495 bool have_higher_than_11mbit = false;
ae5eb026 1496 u16 ap_ht_cap_flags;
f0706e82 1497
77fdaa12
JB		 1498 /*
1499 * AssocResp and ReassocResp have identical structure, so process both
1500 * of them in this function.
1501 */
f0706e82 1502
f4ea83dd 1503 if (len < 24 + 6)
77fdaa12 1504 return RX_MGMT_NONE;
f0706e82 1505
63f170e0 1506 if (memcmp(bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
77fdaa12 1507 return RX_MGMT_NONE;
f0706e82
JB		 1508
1509 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1510 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1511 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1512
0c68ae26 1513 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1514 "status=%d aid=%d)\n",
47846c9b 1515 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1516 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1517
63a5ab82
JM		 1518 pos = mgmt->u.assoc_resp.variable;
1519 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1520
1521 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1522 elems.timeout_int && elems.timeout_int_len == 5 &&
1523 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1524 u32 tu, ms;
f797eb7e 1525 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1526 ms = tu * 1024 / 1000;
1527 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1528 "comeback duration %u TU (%u ms)\n",
47846c9b 1529 sdata->name, tu, ms);
77fdaa12 1530 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1531 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1532 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1533 return RX_MGMT_NONE;
63a5ab82
JM		 1534 }
1535
63f170e0
JB		 1536 /*
1537 * Here the association was either successful or not.
1538 */
1539
1540 /* delete work item -- must be before set_associated for PS */
1541 list_del(&wk->list);
1542 kfree(wk);
1543
f0706e82
JB		 1544 if (status_code != WLAN_STATUS_SUCCESS) {
1545 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
47846c9b 1546 sdata->name, status_code);
77fdaa12 1547 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1548 }
1549
1dd84aa2
JB		 1550 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1551 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1552 "set\n", sdata->name, aid);
1dd84aa2
JB		 1553 aid &= ~(BIT(15) | BIT(14));
1554
f0706e82
JB		 1555 if (!elems.supp_rates) {
1556 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1557 sdata->name);
77fdaa12 1558 return RX_MGMT_NONE;
f0706e82
JB		 1559 }
1560
47846c9b 1561 printk(KERN_DEBUG "%s: associated\n", sdata->name);
46900298 1562 ifmgd->aid = aid;
f0706e82 1563
63f170e0 1564 sta = sta_info_alloc(sdata, bss->cbss.bssid, GFP_KERNEL);
f0706e82 1565 if (!sta) {
5d1ec85f
JB		 1566 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1567 " the AP\n", sdata->name);
1568 return RX_MGMT_CFG80211_ASSOC_ERROR;
77fdaa12 1569 }
05e5e883 1570
5d1ec85f
JB		 1571 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1572 WLAN_STA_ASSOC_AP);
1573 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1574 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1575
60f8b39c
JB		 1576 rates = 0;
1577 basic_rates = 0;
1578 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1579
60f8b39c
JB		 1580 for (i = 0; i < elems.supp_rates_len; i++) {
1581 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1582 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1583
60f8b39c
JB		 1584 if (rate > 110)
1585 have_higher_than_11mbit = true;
1586
1587 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1588 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1589 rates |= BIT(j);
d61272cb
TW		 1590 if (is_basic)
1591 basic_rates |= BIT(j);
1592 break;
1593 }
f709fc69 1594 }
f709fc69
LCC		 1595 }
1596
60f8b39c
JB		 1597 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1598 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1599 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1600
60f8b39c
JB		 1601 if (rate > 110)
1602 have_higher_than_11mbit = true;
f0706e82 1603
60f8b39c 1604 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1605 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1606 rates |= BIT(j);
d61272cb
TW		 1607 if (is_basic)
1608 basic_rates |= BIT(j);
1609 break;
1610 }
60f8b39c 1611 }
1ebebea8 1612 }
f0706e82 1613
323ce79a 1614 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1615 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1616
1617 /* cf. IEEE 802.11 9.2.12 */
1618 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1619 have_higher_than_11mbit)
1620 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1621 else
1622 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1623
ab1faead 1624 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1625 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1626 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1627
1628 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1629
4b7679a5 1630 rate_control_rate_init(sta);
f0706e82 1631
46900298 1632 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1633 set_sta_flags(sta, WLAN_STA_MFP);
1634
ddf4ac53 1635 if (elems.wmm_param)
60f8b39c 1636 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1637
5d1ec85f
JB		 1638 err = sta_info_insert(sta);
1639 sta = NULL;
1640 if (err) {
1641 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1642 " the AP (error %d)\n", sdata->name, err);
1643 return RX_MGMT_CFG80211_ASSOC_ERROR;
ddf4ac53
JB		 1644 }
1645
ddf4ac53 1646 if (elems.wmm_param)
46900298 1647 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1648 elems.wmm_param_len);
aa837e1d
JB		 1649 else
1650 ieee80211_set_wmm_default(sdata);
f0706e82 1651
ae5eb026 1652 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1653 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1654 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1655 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
63f170e0 1656 bss->cbss.bssid,
ae5eb026
JB		 1657 ap_ht_cap_flags);
1658
60f8b39c
JB		 1659 /* set AID and assoc capability,
1660 * ieee80211_set_associated() will tell the driver */
1661 bss_conf->aid = aid;
1662 bss_conf->assoc_capability = capab_info;
63f170e0 1663 ieee80211_set_associated(sdata, bss, changed);
f0706e82 1664
15b7b062 1665 /*
b291ba11
JB		 1666 * Start timer to probe the connection to the AP now.
1667 * Also start the timer that will detect beacon loss.
15b7b062 1668 */
b291ba11
JB		 1669 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1670 mod_beacon_timer(sdata);
15b7b062 1671
77fdaa12 1672 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1673}
1674
1675
98c8fccf
JB		 1676static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1677 struct ieee80211_mgmt *mgmt,
1678 size_t len,
1679 struct ieee80211_rx_status *rx_status,
1680 struct ieee802_11_elems *elems,
1681 bool beacon)
1682{
1683 struct ieee80211_local *local = sdata->local;
1684 int freq;
c2b13452 1685 struct ieee80211_bss *bss;
98c8fccf 1686 struct ieee80211_channel *channel;
98c8fccf
JB		 1687
1688 if (elems->ds_params && elems->ds_params_len == 1)
1689 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1690 else
1691 freq = rx_status->freq;
1692
1693 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1694
1695 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1696 return;
1697
98c8fccf 1698 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1699 channel, beacon);
77fdaa12
JB		 1700 if (bss)
1701 ieee80211_rx_bss_put(local, bss);
1702
1703 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1704 return;
1705
c481ec97 1706 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1707 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1708 ETH_ALEN) == 0)) {
c481ec97
S		 1709 struct ieee80211_channel_sw_ie *sw_elem =
1710 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1711 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1712 }
f0706e82
JB		 1713}
1714
1715
f698d856 1716static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f679f65d 1717 struct ieee80211_work *wk,
77fdaa12 1718 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1719 struct ieee80211_rx_status *rx_status)
1720{
15b7b062 1721 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1722 size_t baselen;
1723 struct ieee802_11_elems elems;
1724
15b7b062
KV		 1725 ifmgd = &sdata->u.mgd;
1726
77fdaa12
JB		 1727 ASSERT_MGD_MTX(ifmgd);
1728
47846c9b 1729 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1730 return; /* ignore ProbeResp to foreign address */
1731
ae6a44e3
EK		 1732 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1733 if (baselen > len)
1734 return;
1735
1736 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1737 &elems);
1738
98c8fccf 1739 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1740
1741 /* direct probe may be part of the association flow */
f679f65d 1742 if (wk && wk->type == IEEE80211_WORK_AUTH_PROBE) {
0ff71613 1743 printk(KERN_DEBUG "%s: direct probe responded\n",
47846c9b 1744 sdata->name);
f679f65d
JB		 1745 wk->auth.tries = 0;
1746 wk->type = IEEE80211_WORK_AUTH;
77fdaa12 1747 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1748 }
15b7b062 1749
77fdaa12
JB		 1750 if (ifmgd->associated &&
1751 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1752 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1753 IEEE80211_STA_CONNECTION_POLL)) {
1754 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1755 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1756 mutex_lock(&sdata->local->iflist_mtx);
1757 ieee80211_recalc_ps(sdata->local, -1);
1758 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1759 /*
1760 * We've received a probe response, but are not sure whether
1761 * we have or will be receiving any beacons or data, so let's
1762 * schedule the timers again, just in case.
1763 */
1764 mod_beacon_timer(sdata);
1765 mod_timer(&ifmgd->conn_mon_timer,
1766 round_jiffies_up(jiffies +
1767 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1768 }
f0706e82
JB		 1769}
1770
d91f36db
JB		 1771/*
1772 * This is the canonical list of information elements we care about,
1773 * the filter code also gives us all changes to the Microsoft OUI
1774 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1775 *
1776 * We implement beacon filtering in software since that means we can
1777 * avoid processing the frame here and in cfg80211, and userspace
1778 * will not be able to tell whether the hardware supports it or not.
1779 *
1780 * XXX: This list needs to be dynamic -- userspace needs to be able to
1781 * add items it requires. It also needs to be able to tell us to
1782 * look out for other vendor IEs.
1783 */
1784static const u64 care_about_ies =
1d4df3a5
JB		 1785 (1ULL << WLAN_EID_COUNTRY) |
1786 (1ULL << WLAN_EID_ERP_INFO) |
1787 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1788 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1789 (1ULL << WLAN_EID_HT_CAPABILITY) |
1790 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1791
f698d856 1792static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1793 struct ieee80211_mgmt *mgmt,
1794 size_t len,
1795 struct ieee80211_rx_status *rx_status)
1796{
d91f36db 1797 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1798 size_t baselen;
1799 struct ieee802_11_elems elems;
f698d856 1800 struct ieee80211_local *local = sdata->local;
471b3efd 1801 u32 changed = 0;
d91f36db 1802 bool erp_valid, directed_tim = false;
7a5158ef 1803 u8 erp_value = 0;
d91f36db 1804 u32 ncrc;
77fdaa12
JB		 1805 u8 *bssid;
1806
1807 ASSERT_MGD_MTX(ifmgd);
f0706e82 1808
ae6a44e3
EK		 1809 /* Process beacon from the current BSS */
1810 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1811 if (baselen > len)
1812 return;
1813
d91f36db 1814 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1815 return;
f0706e82 1816
b291ba11
JB		 1817 /*
1818 * We might have received a number of frames, among them a
1819 * disassoc frame and a beacon...
1820 */
1821 if (!ifmgd->associated)
77fdaa12
JB		 1822 return;
1823
1824 bssid = ifmgd->associated->cbss.bssid;
1825
b291ba11
JB		 1826 /*
1827 * And in theory even frames from a different AP we were just
1828 * associated to a split-second ago!
1829 */
1830 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1831 return;
1832
b291ba11 1833 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1834#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1835 if (net_ratelimit()) {
1836 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1837 "to a received beacon\n", sdata->name);
92778180
JM		 1838 }
1839#endif
b291ba11 1840 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1841 mutex_lock(&local->iflist_mtx);
1842 ieee80211_recalc_ps(local, -1);
1843 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1844 }
1845
b291ba11
JB		 1846 /*
1847 * Push the beacon loss detection into the future since
1848 * we are processing a beacon from the AP just now.
1849 */
1850 mod_beacon_timer(sdata);
1851
d91f36db
JB		 1852 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1853 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1854 len - baselen, &elems,
1855 care_about_ies, ncrc);
1856
1857 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1858 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1859 ifmgd->aid);
d91f36db 1860
30196673
JM		 1861 if (ncrc != ifmgd->beacon_crc) {
1862 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1863 true);
d91f36db 1864
30196673
JM		 1865 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1866 elems.wmm_param_len);
1867 }
fe3fa827 1868
25c9c875 1869 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1870 if (directed_tim) {
572e0012
KV		 1871 if (local->hw.conf.dynamic_ps_timeout > 0) {
1872 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1873 ieee80211_hw_config(local,
1874 IEEE80211_CONF_CHANGE_PS);
1875 ieee80211_send_nullfunc(local, sdata, 0);
1876 } else {
1877 local->pspolling = true;
1878
1879 /*
1880 * Here is assumed that the driver will be
1881 * able to send ps-poll frame and receive a
1882 * response even though power save mode is
1883 * enabled, but some drivers might require
1884 * to disable power save here. This needs
1885 * to be investigated.
1886 */
1887 ieee80211_send_pspoll(local, sdata);
1888 }
a97b77b9
VN		 1889 }
1890 }
7a5158ef 1891
30196673
JM		 1892 if (ncrc == ifmgd->beacon_crc)
1893 return;
1894 ifmgd->beacon_crc = ncrc;
1895
7a5158ef
JB		 1896 if (elems.erp_info && elems.erp_info_len >= 1) {
1897 erp_valid = true;
1898 erp_value = elems.erp_info[0];
1899 } else {
1900 erp_valid = false;
50c4afb9 1901 }
7a5158ef
JB		 1902 changed |= ieee80211_handle_bss_capability(sdata,
1903 le16_to_cpu(mgmt->u.beacon.capab_info),
1904 erp_valid, erp_value);
f0706e82 1905
d3c990fb 1906
53d6f81c 1907 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1908 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1909 struct sta_info *sta;
1910 struct ieee80211_supported_band *sband;
1911 u16 ap_ht_cap_flags;
1912
1913 rcu_read_lock();
1914
abe60632 1915 sta = sta_info_get(sdata, bssid);
77fdaa12 1916 if (WARN_ON(!sta)) {
ae5eb026
JB		 1917 rcu_read_unlock();
1918 return;
1919 }
1920
1921 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1922
1923 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1924 elems.ht_cap_elem, &sta->sta.ht_cap);
1925
1926 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1927
1928 rcu_read_unlock();
1929
1930 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1931 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1932 }
1933
8b19e6ca 1934 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1935 if (elems.country_elem) {
a8302de9
VT		 1936 /* TODO: IBSS also needs this */
1937 if (elems.pwr_constr_elem)
1938 ieee80211_handle_pwr_constr(sdata,
1939 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1940 elems.pwr_constr_elem,
1941 elems.pwr_constr_elem_len);
3f2355cb
LR		 1942 }
1943
471b3efd 1944 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1945}
1946
46900298 1947ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1948 struct sk_buff *skb)
f0706e82 1949{
f698d856 1950 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1951 struct ieee80211_mgmt *mgmt;
1952 u16 fc;
1953
1954 if (skb->len < 24)
46900298 1955 return RX_DROP_MONITOR;
f0706e82
JB		 1956
1957 mgmt = (struct ieee80211_mgmt *) skb->data;
1958 fc = le16_to_cpu(mgmt->frame_control);
1959
1960 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1961 case IEEE80211_STYPE_PROBE_RESP:
1962 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1963 case IEEE80211_STYPE_AUTH:
1964 case IEEE80211_STYPE_ASSOC_RESP:
1965 case IEEE80211_STYPE_REASSOC_RESP:
1966 case IEEE80211_STYPE_DEAUTH:
1967 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1968 case IEEE80211_STYPE_ACTION:
46900298 1969 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1970 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1971 return RX_QUEUED;
f0706e82
JB		 1972 }
1973
46900298 1974 return RX_DROP_MONITOR;
f0706e82
JB		 1975}
1976
f698d856 1977static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1978 struct sk_buff *skb)
1979{
77fdaa12 1980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1981 struct ieee80211_rx_status *rx_status;
f0706e82 1982 struct ieee80211_mgmt *mgmt;
f679f65d 1983 struct ieee80211_work *wk;
77fdaa12 1984 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1985 u16 fc;
1986
f0706e82
JB		 1987 rx_status = (struct ieee80211_rx_status *) skb->cb;
1988 mgmt = (struct ieee80211_mgmt *) skb->data;
1989 fc = le16_to_cpu(mgmt->frame_control);
1990
77fdaa12
JB		 1991 mutex_lock(&ifmgd->mtx);
1992
1993 if (ifmgd->associated &&
1994 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1995 ETH_ALEN) == 0) {
1996 switch (fc & IEEE80211_FCTL_STYPE) {
1997 case IEEE80211_STYPE_BEACON:
1998 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1999 rx_status);
2000 break;
2001 case IEEE80211_STYPE_PROBE_RESP:
2002 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
2003 skb->len, rx_status);
2004 break;
2005 case IEEE80211_STYPE_DEAUTH:
63f170e0 2006 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 2007 break;
2008 case IEEE80211_STYPE_DISASSOC:
2009 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2010 break;
2011 case IEEE80211_STYPE_ACTION:
2012 /* XXX: differentiate, can only happen for CSA now! */
2013 ieee80211_sta_process_chanswitch(sdata,
2014 &mgmt->u.action.u.chan_switch.sw_elem,
2015 ifmgd->associated);
2016 break;
2017 }
2018 mutex_unlock(&ifmgd->mtx);
2019
2020 switch (rma) {
2021 case RX_MGMT_NONE:
2022 /* no action */
2023 break;
2024 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2025 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2026 break;
2027 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2028 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2029 break;
2030 default:
2031 WARN(1, "unexpected: %d", rma);
2032 }
2033 goto out;
2034 }
2035
2036 list_for_each_entry(wk, &ifmgd->work_list, list) {
f679f65d
JB		 2037 const u8 *bssid = NULL;
2038
2039 switch (wk->type) {
2040 case IEEE80211_WORK_AUTH_PROBE:
2041 case IEEE80211_WORK_AUTH:
2042 bssid = wk->auth.bssid;
2043 break;
2044 case IEEE80211_WORK_ASSOC:
2045 bssid = wk->assoc.bssid;
2046 break;
2047 default:
2048 continue;
2049 }
2050 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
77fdaa12
JB		 2051 continue;
2052
2053 switch (fc & IEEE80211_FCTL_STYPE) {
2054 case IEEE80211_STYPE_PROBE_RESP:
2055 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
2056 rx_status);
2057 break;
2058 case IEEE80211_STYPE_AUTH:
2059 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
2060 break;
2061 case IEEE80211_STYPE_ASSOC_RESP:
2062 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2063 skb->len, false);
2064 break;
2065 case IEEE80211_STYPE_REASSOC_RESP:
2066 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2067 skb->len, true);
2068 break;
2069 case IEEE80211_STYPE_DEAUTH:
63f170e0
JB		 2070 if (skb->len >= 24 + 2 /* mgmt + deauth reason */) {
2071 /*
2072 * We get here if we get deauth while
2073 * trying to auth/assoc. Telling cfg80211
2074 * is handled below, unconditionally.
2075 */
2076 list_del(&wk->list);
2077 kfree(wk);
2078 }
77fdaa12
JB		 2079 break;
2080 }
2081 /*
2082 * We've processed this frame for that work, so it can't
2083 * belong to another work struct.
2084 * NB: this is also required for correctness because the
2085 * called functions can free 'wk', and for 'rma'!
2086 */
46900298 2087 break;
77fdaa12
JB		 2088 }
2089
2090 mutex_unlock(&ifmgd->mtx);
2091
63f170e0
JB		 2092 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2093 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2094 WARN_ON(rma != RX_MGMT_NONE);
2095 rma = RX_MGMT_CFG80211_DEAUTH;
2096 }
2097
77fdaa12
JB		 2098 switch (rma) {
2099 case RX_MGMT_NONE:
2100 /* no action */
46900298 2101 break;
77fdaa12 2102 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2103 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2104 break;
77fdaa12 2105 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2106 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2107 break;
8d8b261a 2108 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2109 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2110 break;
5d1ec85f
JB		 2111 case RX_MGMT_CFG80211_ASSOC_ERROR:
2112 /* an internal error -- pretend timeout for now */
2113 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2114 break;
77fdaa12
JB		 2115 default:
2116 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2117 }
2118
77fdaa12 2119 out:
f0706e82
JB		 2120 kfree_skb(skb);
2121}
2122
9c6bd790 2123static void ieee80211_sta_timer(unsigned long data)
f0706e82 2124{
60f8b39c
JB		 2125 struct ieee80211_sub_if_data *sdata =
2126 (struct ieee80211_sub_if_data *) data;
46900298 2127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2128 struct ieee80211_local *local = sdata->local;
f0706e82 2129
5bb644a0
JB		 2130 if (local->quiescing) {
2131 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2132 return;
2133 }
2134
42935eca 2135 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2136}
2137
9c6bd790
JB		 2138static void ieee80211_sta_work(struct work_struct *work)
2139{
2140 struct ieee80211_sub_if_data *sdata =
46900298 2141 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2142 struct ieee80211_local *local = sdata->local;
46900298 2143 struct ieee80211_if_managed *ifmgd;
9c6bd790 2144 struct sk_buff *skb;
f679f65d 2145 struct ieee80211_work *wk, *tmp;
77fdaa12
JB		 2146 LIST_HEAD(free_work);
2147 enum rx_mgmt_action rma;
9c6bd790 2148
9607e6b6 2149 if (!ieee80211_sdata_running(sdata))
9c6bd790
JB		 2150 return;
2151
fbe9c429 2152 if (local->scanning)
9c6bd790
JB		 2153 return;
2154
46900298 2155 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2156 return;
5bb644a0
JB		 2157
2158 /*
42935eca
LR		 2159 * ieee80211_queue_work() should have picked up most cases,
2160 * here we'll pick the the rest.
5bb644a0 2161 */
42935eca
LR		 2162 if (WARN(local->suspended, "STA MLME work scheduled while "
2163 "going to suspend\n"))
5bb644a0
JB		 2164 return;
2165
46900298 2166 ifmgd = &sdata->u.mgd;
f0706e82 2167
77fdaa12 2168 /* first process frames to avoid timing out while a frame is pending */
46900298 2169 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2170 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2171
77fdaa12
JB		 2172 /* then process the rest of the work */
2173 mutex_lock(&ifmgd->mtx);
2174
b291ba11
JB		 2175 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2176 IEEE80211_STA_CONNECTION_POLL) &&
2177 ifmgd->associated) {
a43abf29
ML		 2178 u8 bssid[ETH_ALEN];
2179
2180 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2181 if (time_is_after_jiffies(ifmgd->probe_timeout))
2182 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2183
2184 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2185#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2186 printk(KERN_DEBUG "No probe response from AP %pM"
2187 " after %dms, try %d\n", bssid,
2188 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2189 ifmgd->probe_send_count);
2190#endif
2191 ieee80211_mgd_probe_ap_send(sdata);
2192 } else {
b291ba11
JB		 2193 /*
2194 * We actually lost the connection ... or did we?
2195 * Let's make sure!
2196 */
2197 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2198 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2199 printk(KERN_DEBUG "No probe response from AP %pM"
2200 " after %dms, disconnecting.\n",
2201 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
63f170e0 2202 ieee80211_set_disassoc(sdata);
bc83b681 2203 ieee80211_recalc_idle(local);
b291ba11
JB		 2204 mutex_unlock(&ifmgd->mtx);
2205 /*
2206 * must be outside lock due to cfg80211,
2207 * but that's not a problem.
2208 */
2209 ieee80211_send_deauth_disassoc(sdata, bssid,
2210 IEEE80211_STYPE_DEAUTH,
2211 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2212 NULL);
2213 mutex_lock(&ifmgd->mtx);
2214 }
2215 }
2216
f0706e82 2217
77fdaa12
JB		 2218 ieee80211_recalc_idle(local);
2219
77fdaa12 2220 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2221 if (time_is_after_jiffies(wk->timeout)) {
2222 /*
2223 * This work item isn't supposed to be worked on
2224 * right now, but take care to adjust the timer
2225 * properly.
2226 */
2227 run_again(ifmgd, wk->timeout);
77fdaa12 2228 continue;
ca386f31 2229 }
5cff20e6 2230
f679f65d 2231 switch (wk->type) {
77fdaa12
JB		 2232 default:
2233 WARN_ON(1);
77fdaa12
JB		 2234 /* nothing */
2235 rma = RX_MGMT_NONE;
2236 break;
f679f65d 2237 case IEEE80211_WORK_AUTH_PROBE:
77fdaa12
JB		 2238 rma = ieee80211_direct_probe(sdata, wk);
2239 break;
f679f65d 2240 case IEEE80211_WORK_AUTH:
77fdaa12
JB		 2241 rma = ieee80211_authenticate(sdata, wk);
2242 break;
f679f65d 2243 case IEEE80211_WORK_ASSOC:
77fdaa12
JB		 2244 rma = ieee80211_associate(sdata, wk);
2245 break;
2246 }
2247
2248 switch (rma) {
2249 case RX_MGMT_NONE:
2250 /* no action required */
2251 break;
2252 case RX_MGMT_CFG80211_AUTH_TO:
2253 case RX_MGMT_CFG80211_ASSOC_TO:
2254 list_del(&wk->list);
2255 list_add(&wk->list, &free_work);
63f170e0
JB		 2256 /*
2257 * small abuse but only local -- keep the
2258 * action type in wk->timeout while the item
2259 * is on the cleanup list
2260 */
2261 wk->timeout = rma;
77fdaa12
JB		 2262 break;
2263 default:
2264 WARN(1, "unexpected: %d", rma);
2265 }
2266 }
2267
63f170e0 2268 if (list_empty(&ifmgd->work_list) &&
5bf6fcc2
JM		 2269 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2270 ieee80211_queue_delayed_work(&local->hw,
2271 &local->scan_work,
2272 round_jiffies_relative(0));
2273
77fdaa12
JB		 2274 mutex_unlock(&ifmgd->mtx);
2275
2276 list_for_each_entry_safe(wk, tmp, &free_work, list) {
63f170e0
JB		 2277 /* see above how we're using wk->timeout */
2278 switch (wk->timeout) {
77fdaa12 2279 case RX_MGMT_CFG80211_AUTH_TO:
f679f65d 2280 cfg80211_send_auth_timeout(sdata->dev, wk->auth.bssid);
77fdaa12
JB		 2281 break;
2282 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb 2283 cfg80211_send_assoc_timeout(sdata->dev,
f679f65d 2284 wk->assoc.bssid);
77fdaa12
JB		 2285 break;
2286 default:
63f170e0 2287 WARN(1, "unexpected: %lu", wk->timeout);
77fdaa12
JB		 2288 }
2289
2290 list_del(&wk->list);
2291 kfree(wk);
9c6bd790 2292 }
77fdaa12
JB		 2293
2294 ieee80211_recalc_idle(local);
f0706e82
JB		 2295}
2296
b291ba11
JB		 2297static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2298{
2299 struct ieee80211_sub_if_data *sdata =
2300 (struct ieee80211_sub_if_data *) data;
2301 struct ieee80211_local *local = sdata->local;
2302
2303 if (local->quiescing)
2304 return;
2305
42935eca 2306 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2307}
2308
2309static void ieee80211_sta_conn_mon_timer(unsigned long data)
2310{
2311 struct ieee80211_sub_if_data *sdata =
2312 (struct ieee80211_sub_if_data *) data;
2313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2314 struct ieee80211_local *local = sdata->local;
2315
2316 if (local->quiescing)
2317 return;
2318
42935eca 2319 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2320}
2321
2322static void ieee80211_sta_monitor_work(struct work_struct *work)
2323{
2324 struct ieee80211_sub_if_data *sdata =
2325 container_of(work, struct ieee80211_sub_if_data,
2326 u.mgd.monitor_work);
2327
2328 ieee80211_mgd_probe_ap(sdata, false);
2329}
2330
9c6bd790
JB		 2331static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2332{
ad935687 2333 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2334 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2335 IEEE80211_STA_CONNECTION_POLL);
ad935687 2336
b291ba11 2337 /* let's probe the connection once */
42935eca 2338 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2339 &sdata->u.mgd.monitor_work);
2340 /* and do all the other regular work too */
42935eca 2341 ieee80211_queue_work(&sdata->local->hw,
46900298 2342 &sdata->u.mgd.work);
ad935687 2343 }
9c6bd790 2344}
f0706e82 2345
5bb644a0
JB		 2346#ifdef CONFIG_PM
2347void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2348{
2349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2350
2351 /*
2352 * we need to use atomic bitops for the running bits
2353 * only because both timers might fire at the same
2354 * time -- the code here is properly synchronised.
2355 */
2356
2357 cancel_work_sync(&ifmgd->work);
2358 cancel_work_sync(&ifmgd->beacon_loss_work);
2359 if (del_timer_sync(&ifmgd->timer))
2360 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2361
2362 cancel_work_sync(&ifmgd->chswitch_work);
2363 if (del_timer_sync(&ifmgd->chswitch_timer))
2364 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2365
2366 cancel_work_sync(&ifmgd->monitor_work);
2367 /* these will just be re-established on connection */
2368 del_timer_sync(&ifmgd->conn_mon_timer);
2369 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2370}
2371
2372void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2373{
2374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2375
2376 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2377 add_timer(&ifmgd->timer);
2378 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2379 add_timer(&ifmgd->chswitch_timer);
2380}
2381#endif
2382
9c6bd790
JB		 2383/* interface setup */
2384void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2385{
46900298 2386 struct ieee80211_if_managed *ifmgd;
988c0f72 2387
46900298
JB		 2388 ifmgd = &sdata->u.mgd;
2389 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2390 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2391 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2392 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2393 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2394 (unsigned long) sdata);
b291ba11
JB		 2395 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2396 (unsigned long) sdata);
2397 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2398 (unsigned long) sdata);
46900298 2399 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2400 (unsigned long) sdata);
46900298 2401 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2402
77fdaa12
JB		 2403 INIT_LIST_HEAD(&ifmgd->work_list);
2404
46900298 2405 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2406 ifmgd->flags = 0;
176be728 2407 if (sdata->local->hw.queues >= 4)
46900298 2408 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2409
77fdaa12 2410 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2411
2412 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2413 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2414 else
2415 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2416}
2417
77fdaa12
JB		 2418/* scan finished notification */
2419void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2420{
77fdaa12 2421 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2422
77fdaa12
JB		 2423 /* Restart STA timers */
2424 rcu_read_lock();
2425 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2426 ieee80211_restart_sta_timer(sdata);
2427 rcu_read_unlock();
2428}
60f8b39c 2429
77fdaa12
JB		 2430int ieee80211_max_network_latency(struct notifier_block *nb,
2431 unsigned long data, void *dummy)
2432{
2433 s32 latency_usec = (s32) data;
2434 struct ieee80211_local *local =
2435 container_of(nb, struct ieee80211_local,
2436 network_latency_notifier);
1fa6f4af 2437
77fdaa12
JB		 2438 mutex_lock(&local->iflist_mtx);
2439 ieee80211_recalc_ps(local, latency_usec);
2440 mutex_unlock(&local->iflist_mtx);
dfe67012 2441
77fdaa12 2442 return 0;
9c6bd790
JB		 2443}
2444
77fdaa12
JB		 2445/* config hooks */
2446int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2447 struct cfg80211_auth_request *req)
9c6bd790 2448{
46900298 2449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2450 const u8 *ssid;
f679f65d 2451 struct ieee80211_work *wk;
77fdaa12 2452 u16 auth_alg;
9c6bd790 2453
77fdaa12
JB		 2454 switch (req->auth_type) {
2455 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2456 auth_alg = WLAN_AUTH_OPEN;
2457 break;
2458 case NL80211_AUTHTYPE_SHARED_KEY:
2459 auth_alg = WLAN_AUTH_SHARED_KEY;
2460 break;
2461 case NL80211_AUTHTYPE_FT:
2462 auth_alg = WLAN_AUTH_FT;
2463 break;
2464 case NL80211_AUTHTYPE_NETWORK_EAP:
2465 auth_alg = WLAN_AUTH_LEAP;
2466 break;
2467 default:
2468 return -EOPNOTSUPP;
60f8b39c 2469 }
77fdaa12
JB		 2470
2471 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2472 if (!wk)
9c6bd790 2473 return -ENOMEM;
77fdaa12 2474
f679f65d 2475 memcpy(wk->auth.bssid, req->bss->bssid, ETH_ALEN);;
77fdaa12
JB		 2476
2477 if (req->ie && req->ie_len) {
2478 memcpy(wk->ie, req->ie, req->ie_len);
2479 wk->ie_len = req->ie_len;
9c6bd790 2480 }
77fdaa12 2481
fffd0934 2482 if (req->key && req->key_len) {
f679f65d
JB		 2483 wk->auth.key_len = req->key_len;
2484 wk->auth.key_idx = req->key_idx;
2485 memcpy(wk->auth.key, req->key, req->key_len);
fffd0934
JB		 2486 }
2487
77fdaa12 2488 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2489 memcpy(wk->auth.ssid, ssid + 2, ssid[1]);
2490 wk->auth.ssid_len = ssid[1];
2491
2492 wk->auth.algorithm = auth_alg;
2493 wk->auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
77fdaa12 2494
f679f65d 2495 wk->type = IEEE80211_WORK_AUTH_PROBE;
48531847 2496 wk->timeout = jiffies; /* run right away */
f679f65d 2497 wk->chan = req->bss->channel;
77fdaa12
JB		 2498
2499 /*
2500 * XXX: if still associated need to tell AP that we're going
2501 * to sleep and then change channel etc.
f679f65d
JB		 2502 * For now switch channel here, later will be handled
2503 * by submitting this as an off-channel work item.
77fdaa12
JB		 2504 */
2505 sdata->local->oper_channel = req->bss->channel;
2506 ieee80211_hw_config(sdata->local, 0);
2507
2508 mutex_lock(&ifmgd->mtx);
2509 list_add(&wk->list, &sdata->u.mgd.work_list);
2510 mutex_unlock(&ifmgd->mtx);
2511
42935eca 2512 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2513 return 0;
60f8b39c
JB		 2514}
2515
77fdaa12
JB		 2516int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2517 struct cfg80211_assoc_request *req)
f0706e82 2518{
77fdaa12 2519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2520 struct ieee80211_work *wk;
63f170e0 2521 const u8 *ssid;
77fdaa12 2522 int i, err;
f0706e82 2523
77fdaa12
JB		 2524 mutex_lock(&ifmgd->mtx);
2525
63f170e0 2526 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
77fdaa12 2527 if (!wk) {
77fdaa12
JB		 2528 err = -ENOMEM;
2529 goto out;
2530 }
2531
77fdaa12
JB		 2532 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2533
2534 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2535 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2536 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2537 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2538 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2539
77fdaa12
JB		 2540
2541 if (req->ie && req->ie_len) {
2542 memcpy(wk->ie, req->ie, req->ie_len);
2543 wk->ie_len = req->ie_len;
2544 } else
2545 wk->ie_len = 0;
2546
f679f65d
JB		 2547 wk->assoc.bss = (void *)req->bss;
2548
2549 memcpy(wk->assoc.bssid, req->bss->bssid, ETH_ALEN);
2550
2551 wk->assoc.capability = req->bss->capability;
2552 wk->assoc.wmm_used = wk->assoc.bss->wmm_used;
2553 wk->assoc.supp_rates = wk->assoc.bss->supp_rates;
2554 wk->assoc.supp_rates_len = wk->assoc.bss->supp_rates_len;
2555 wk->assoc.ht_information_ie =
2556 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
63f170e0
JB		 2557
2558 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
f679f65d
JB		 2559 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2560 wk->assoc.ssid_len = ssid[1];
63f170e0 2561
77fdaa12 2562 if (req->prev_bssid)
f679f65d 2563 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12 2564
f679f65d 2565 wk->type = IEEE80211_WORK_ASSOC;
48531847 2566 wk->timeout = jiffies; /* run right away */
f679f65d 2567 wk->chan = req->bss->channel;
77fdaa12
JB		 2568
2569 if (req->use_mfp) {
2570 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2571 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2572 } else {
2573 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2574 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2575 }
2576
2577 if (req->crypto.control_port)
2578 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2579 else
2580 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2581
63f170e0
JB		 2582 sdata->local->oper_channel = req->bss->channel;
2583 ieee80211_hw_config(sdata->local, 0);
2584
2585 list_add(&wk->list, &ifmgd->work_list);
42935eca 2586 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2587
2588 err = 0;
2589
2590 out:
2591 mutex_unlock(&ifmgd->mtx);
2592 return err;
f0706e82
JB		 2593}
2594
77fdaa12 2595int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2596 struct cfg80211_deauth_request *req,
2597 void *cookie)
f0706e82 2598{
46900298 2599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f679f65d 2600 struct ieee80211_work *wk;
63f170e0 2601 const u8 *bssid = req->bss->bssid;
a58ce43f 2602 bool not_auth_yet = false;
f0706e82 2603
77fdaa12
JB		 2604 mutex_lock(&ifmgd->mtx);
2605
2606 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2607 bssid = req->bss->bssid;
63f170e0 2608 ieee80211_set_disassoc(sdata);
77fdaa12 2609 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
f679f65d 2610 if (wk->type != IEEE80211_WORK_AUTH_PROBE)
63f170e0 2611 continue;
f679f65d 2612 if (memcmp(req->bss->bssid, wk->auth.bssid, ETH_ALEN))
63f170e0
JB		 2613 continue;
2614 not_auth_yet = true;
2615 list_del(&wk->list);
2616 kfree(wk);
2617 break;
77fdaa12 2618 }
f0706e82 2619
a58ce43f
JB		 2620 /*
2621 * If somebody requests authentication and we haven't
2622 * sent out an auth frame yet there's no need to send
2623 * out a deauth frame either. If the state was PROBE,
2624 * then this is the case. If it's AUTH we have sent a
2625 * frame, and if it's IDLE we have completed the auth
2626 * process already.
2627 */
2628 if (not_auth_yet) {
2629 mutex_unlock(&ifmgd->mtx);
2630 __cfg80211_auth_canceled(sdata->dev, bssid);
2631 return 0;
2632 }
2633
77fdaa12
JB		 2634 mutex_unlock(&ifmgd->mtx);
2635
0ff71613 2636 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2637 sdata->name, bssid, req->reason_code);
0ff71613 2638
77fdaa12 2639 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2640 IEEE80211_STYPE_DEAUTH, req->reason_code,
2641 cookie);
f0706e82 2642
bc83b681
JB		 2643 ieee80211_recalc_idle(sdata->local);
2644
f0706e82
JB		 2645 return 0;
2646}
84363e6e 2647
77fdaa12 2648int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2649 struct cfg80211_disassoc_request *req,
2650 void *cookie)
9c6bd790 2651{
77fdaa12 2652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2653
77fdaa12 2654 mutex_lock(&ifmgd->mtx);
10f644a4 2655
8d8b261a
JB		 2656 /*
2657 * cfg80211 should catch this ... but it's racy since
2658 * we can receive a disassoc frame, process it, hand it
2659 * to cfg80211 while that's in a locked section already
2660 * trying to tell us that the user wants to disconnect.
2661 */
2662 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2663 mutex_unlock(&ifmgd->mtx);
2664 return -ENOLINK;
2665 }
2666
0ff71613 2667 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2668 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2669
63f170e0 2670 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2671
2672 mutex_unlock(&ifmgd->mtx);
10f644a4 2673
77fdaa12 2674 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2675 IEEE80211_STYPE_DISASSOC, req->reason_code,
2676 cookie);
bc83b681
JB		 2677
2678 ieee80211_recalc_idle(sdata->local);
2679
10f644a4
JB		 2680 return 0;
2681}
kernel source for telekom puls (alcatel/mediatek)