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[linux-2.6-block.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
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO,
80
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO,
83};
84
5484e237 85/* utils */
77fdaa12
JB		 86static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
87{
88 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
89}
90
ca386f31
JB		 91/*
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
99 * do that.
100 */
101static void run_again(struct ieee80211_if_managed *ifmgd,
102 unsigned long timeout)
103{
104 ASSERT_MGD_MTX(ifmgd);
105
106 if (!timer_pending(&ifmgd->timer) ||
107 time_before(timeout, ifmgd->timer.expires))
108 mod_timer(&ifmgd->timer, timeout);
109}
110
b291ba11
JB		 111static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
112{
113 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
114 return;
115
116 mod_timer(&sdata->u.mgd.bcn_mon_timer,
117 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
118}
119
5484e237 120static int ecw2cw(int ecw)
60f8b39c 121{
5484e237 122 return (1 << ecw) - 1;
60f8b39c
JB		 123}
124
c2b13452 125static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 126 struct ieee80211_supported_band *sband,
881d948c 127 u32 *rates)
9ac19a90
JB		 128{
129 int i, j, count;
130 *rates = 0;
131 count = 0;
132 for (i = 0; i < bss->supp_rates_len; i++) {
133 int rate = (bss->supp_rates[i] & 0x7F) * 5;
134
135 for (j = 0; j < sband->n_bitrates; j++)
136 if (sband->bitrates[j].bitrate == rate) {
137 *rates |= BIT(j);
138 count++;
139 break;
140 }
141 }
142
143 return count;
144}
145
d5522e03
JB		 146/*
147 * ieee80211_enable_ht should be called only after the operating band
148 * has been determined as ht configuration depends on the hw's
149 * HT abilities for a specific band.
150 */
151static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_ht_info *hti,
77fdaa12 153 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 154{
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_supported_band *sband;
d5522e03
JB		 157 struct sta_info *sta;
158 u32 changed = 0;
9ed6bcce 159 u16 ht_opmode;
d5522e03
JB		 160 bool enable_ht = true, ht_changed;
161 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
162
163 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
164
d5522e03
JB		 165 /* HT is not supported */
166 if (!sband->ht_cap.ht_supported)
167 enable_ht = false;
168
169 /* check that channel matches the right operating channel */
170 if (local->hw.conf.channel->center_freq !=
171 ieee80211_channel_to_frequency(hti->control_chan))
172 enable_ht = false;
173
174 if (enable_ht) {
175 channel_type = NL80211_CHAN_HT20;
176
177 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
178 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
179 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
180 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
181 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 182 if (!(local->hw.conf.channel->flags &
183 IEEE80211_CHAN_NO_HT40PLUS))
184 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 185 break;
186 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 187 if (!(local->hw.conf.channel->flags &
188 IEEE80211_CHAN_NO_HT40MINUS))
189 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 190 break;
191 }
192 }
193 }
194
195 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
196 channel_type != local->hw.conf.channel_type;
197
198 local->oper_channel_type = channel_type;
199
200 if (ht_changed) {
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local, 0);
203
204 rcu_read_lock();
77fdaa12 205 sta = sta_info_get(local, bssid);
d5522e03
JB		 206 if (sta)
207 rate_control_rate_update(local, sband, sta,
208 IEEE80211_RC_HT_CHANGED);
d5522e03 209 rcu_read_unlock();
d5522e03
JB		 210 }
211
212 /* disable HT */
213 if (!enable_ht)
214 return 0;
215
9ed6bcce 216 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 217
218 /* if bss configuration changed store the new one */
413ad50a
JB		 219 if (!sdata->ht_opmode_valid ||
220 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 221 changed |= BSS_CHANGED_HT;
9ed6bcce 222 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 223 sdata->ht_opmode_valid = true;
d5522e03
JB		 224 }
225
226 return changed;
227}
228
9c6bd790
JB		 229/* frame sending functions */
230
77fdaa12
JB		 231static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
232 struct ieee80211_mgd_work *wk)
9ac19a90 233{
46900298 234 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 235 struct ieee80211_local *local = sdata->local;
236 struct sk_buff *skb;
237 struct ieee80211_mgmt *mgmt;
517357c6
JB		 238 u8 *pos;
239 const u8 *ies, *ht_ie;
9ac19a90
JB		 240 int i, len, count, rates_len, supp_rates_len;
241 u16 capab;
9ac19a90
JB		 242 int wmm = 0;
243 struct ieee80211_supported_band *sband;
881d948c 244 u32 rates = 0;
9ac19a90
JB		 245
246 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 247 sizeof(*mgmt) + 200 + wk->ie_len +
248 wk->ssid_len);
9ac19a90
JB		 249 if (!skb) {
250 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
251 "frame\n", sdata->dev->name);
252 return;
253 }
254 skb_reserve(skb, local->hw.extra_tx_headroom);
255
256 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
257
46900298 258 capab = ifmgd->capab;
9ac19a90
JB		 259
260 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
261 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
262 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
263 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
264 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
265 }
266
77fdaa12
JB		 267 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
268 capab |= WLAN_CAPABILITY_PRIVACY;
269 if (wk->bss->wmm_used)
270 wmm = 1;
9ac19a90 271
77fdaa12
JB		 272 /* get all rates supported by the device and the AP as
273 * some APs don't like getting a superset of their rates
274 * in the association request (e.g. D-Link DAP 1353 in
275 * b-only mode) */
276 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 277
77fdaa12
JB		 278 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
279 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
280 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 281
282 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
283 memset(mgmt, 0, 24);
77fdaa12 284 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 285 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 286 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 287
77fdaa12 288 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 289 skb_put(skb, 10);
290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
291 IEEE80211_STYPE_REASSOC_REQ);
292 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
293 mgmt->u.reassoc_req.listen_interval =
294 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 295 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 296 ETH_ALEN);
297 } else {
298 skb_put(skb, 4);
299 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
300 IEEE80211_STYPE_ASSOC_REQ);
301 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 302 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 303 cpu_to_le16(local->hw.conf.listen_interval);
304 }
305
306 /* SSID */
77fdaa12 307 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 308 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 309 *pos++ = wk->ssid_len;
310 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 311
312 /* add all rates which were marked to be used above */
313 supp_rates_len = rates_len;
314 if (supp_rates_len > 8)
315 supp_rates_len = 8;
316
317 len = sband->n_bitrates;
318 pos = skb_put(skb, supp_rates_len + 2);
319 *pos++ = WLAN_EID_SUPP_RATES;
320 *pos++ = supp_rates_len;
321
322 count = 0;
323 for (i = 0; i < sband->n_bitrates; i++) {
324 if (BIT(i) & rates) {
325 int rate = sband->bitrates[i].bitrate;
326 *pos++ = (u8) (rate / 5);
327 if (++count == 8)
328 break;
329 }
330 }
331
332 if (rates_len > count) {
333 pos = skb_put(skb, rates_len - count + 2);
334 *pos++ = WLAN_EID_EXT_SUPP_RATES;
335 *pos++ = rates_len - count;
336
337 for (i++; i < sband->n_bitrates; i++) {
338 if (BIT(i) & rates) {
339 int rate = sband->bitrates[i].bitrate;
340 *pos++ = (u8) (rate / 5);
341 }
342 }
343 }
344
345 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
346 /* 1. power capabilities */
347 pos = skb_put(skb, 4);
348 *pos++ = WLAN_EID_PWR_CAPABILITY;
349 *pos++ = 2;
350 *pos++ = 0; /* min tx power */
351 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
352
353 /* 2. supported channels */
354 /* TODO: get this in reg domain format */
355 pos = skb_put(skb, 2 * sband->n_channels + 2);
356 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
357 *pos++ = 2 * sband->n_channels;
358 for (i = 0; i < sband->n_channels; i++) {
359 *pos++ = ieee80211_frequency_to_channel(
360 sband->channels[i].center_freq);
361 *pos++ = 1; /* one channel in the subband*/
362 }
363 }
364
77fdaa12
JB		 365 if (wk->ie_len && wk->ie) {
366 pos = skb_put(skb, wk->ie_len);
367 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 368 }
369
46900298 370 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 371 pos = skb_put(skb, 9);
372 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
373 *pos++ = 7; /* len */
374 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
375 *pos++ = 0x50;
376 *pos++ = 0xf2;
377 *pos++ = 2; /* WME */
378 *pos++ = 0; /* WME info */
379 *pos++ = 1; /* WME ver */
380 *pos++ = 0;
381 }
382
383 /* wmm support is a must to HT */
eb46936b
VT		 384 /*
385 * IEEE802.11n does not allow TKIP/WEP as pairwise
386 * ciphers in HT mode. We still associate in non-ht
387 * mode (11a/b/g) if any one of these ciphers is
388 * configured as pairwise.
389 */
46900298 390 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 391 sband->ht_cap.ht_supported &&
77fdaa12 392 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 393 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 394 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 395 struct ieee80211_ht_info *ht_info =
396 (struct ieee80211_ht_info *)(ht_ie + 2);
397 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 398 __le16 tmp;
399 u32 flags = local->hw.conf.channel->flags;
400
d9fe60de
JB		 401 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
402 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 403 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 404 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 405 cap &= ~IEEE80211_HT_CAP_SGI_40;
406 }
407 break;
d9fe60de 408 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 409 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 410 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 411 cap &= ~IEEE80211_HT_CAP_SGI_40;
412 }
413 break;
414 }
415
416 tmp = cpu_to_le16(cap);
417 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
418 *pos++ = WLAN_EID_HT_CAPABILITY;
419 *pos++ = sizeof(struct ieee80211_ht_cap);
420 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
421 memcpy(pos, &tmp, sizeof(u16));
422 pos += sizeof(u16);
423 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 424 *pos++ = sband->ht_cap.ampdu_factor |
425 (sband->ht_cap.ampdu_density << 2);
426 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 427 }
428
62ae67be
JB		 429 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
430 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 431}
432
433
ef422bc0 434static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 435 const u8 *bssid, u16 stype, u16 reason,
436 void *cookie)
9ac19a90
JB		 437{
438 struct ieee80211_local *local = sdata->local;
46900298 439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 440 struct sk_buff *skb;
441 struct ieee80211_mgmt *mgmt;
9aed3cc1 442
65fc73ac 443 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 444 if (!skb) {
ef422bc0
JB		 445 printk(KERN_DEBUG "%s: failed to allocate buffer for "
446 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 447 return;
448 }
449 skb_reserve(skb, local->hw.extra_tx_headroom);
450
451 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
452 memset(mgmt, 0, 24);
77fdaa12 453 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 454 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 455 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 456 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 457 skb_put(skb, 2);
ef422bc0 458 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 459 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
460
53b46b84 461 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 462 if (cookie)
463 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
464 else
465 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 466 else
ce470613
HS		 467 if (cookie)
468 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
469 else
470 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 471 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
472 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
473 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 474}
475
572e0012
KV		 476void ieee80211_send_pspoll(struct ieee80211_local *local,
477 struct ieee80211_sub_if_data *sdata)
478{
46900298 479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 480 struct ieee80211_pspoll *pspoll;
481 struct sk_buff *skb;
482 u16 fc;
483
484 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
485 if (!skb) {
486 printk(KERN_DEBUG "%s: failed to allocate buffer for "
487 "pspoll frame\n", sdata->dev->name);
488 return;
489 }
490 skb_reserve(skb, local->hw.extra_tx_headroom);
491
492 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
493 memset(pspoll, 0, sizeof(*pspoll));
494 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
495 pspoll->frame_control = cpu_to_le16(fc);
46900298 496 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 497
498 /* aid in PS-Poll has its two MSBs each set to 1 */
499 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
500
46900298 501 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 502 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
503
62ae67be
JB		 504 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
505 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 506}
507
965bedad
JB		 508void ieee80211_send_nullfunc(struct ieee80211_local *local,
509 struct ieee80211_sub_if_data *sdata,
510 int powersave)
511{
512 struct sk_buff *skb;
513 struct ieee80211_hdr *nullfunc;
514 __le16 fc;
515
516 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
517 return;
518
519 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
520 if (!skb) {
521 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
522 "frame\n", sdata->dev->name);
523 return;
524 }
525 skb_reserve(skb, local->hw.extra_tx_headroom);
526
527 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
528 memset(nullfunc, 0, 24);
529 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
530 IEEE80211_FCTL_TODS);
531 if (powersave)
532 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
533 nullfunc->frame_control = fc;
534 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
535 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
536 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
537
62ae67be
JB		 538 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
539 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 540}
541
cc32abd4
JB		 542/* spectrum management related things */
543static void ieee80211_chswitch_work(struct work_struct *work)
544{
545 struct ieee80211_sub_if_data *sdata =
546 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
548
549 if (!netif_running(sdata->dev))
550 return;
551
77fdaa12
JB		 552 mutex_lock(&ifmgd->mtx);
553 if (!ifmgd->associated)
554 goto out;
cc32abd4
JB		 555
556 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 557 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
558
cc32abd4 559 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 560 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 561
cc32abd4
JB		 562 ieee80211_wake_queues_by_reason(&sdata->local->hw,
563 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 564 out:
565 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
566 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 567}
568
569static void ieee80211_chswitch_timer(unsigned long data)
570{
571 struct ieee80211_sub_if_data *sdata =
572 (struct ieee80211_sub_if_data *) data;
573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
574
5bb644a0
JB		 575 if (sdata->local->quiescing) {
576 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
577 return;
578 }
579
42935eca 580 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 581}
582
583void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
584 struct ieee80211_channel_sw_ie *sw_elem,
585 struct ieee80211_bss *bss)
586{
587 struct ieee80211_channel *new_ch;
588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
589 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
590
77fdaa12
JB		 591 ASSERT_MGD_MTX(ifmgd);
592
593 if (!ifmgd->associated)
cc32abd4
JB		 594 return;
595
fbe9c429 596 if (sdata->local->scanning)
cc32abd4
JB		 597 return;
598
599 /* Disregard subsequent beacons if we are already running a timer
600 processing a CSA */
601
602 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
603 return;
604
605 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
606 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
607 return;
608
609 sdata->local->csa_channel = new_ch;
610
611 if (sw_elem->count <= 1) {
42935eca 612 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 613 } else {
614 ieee80211_stop_queues_by_reason(&sdata->local->hw,
615 IEEE80211_QUEUE_STOP_REASON_CSA);
616 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
617 mod_timer(&ifmgd->chswitch_timer,
618 jiffies +
619 msecs_to_jiffies(sw_elem->count *
620 bss->cbss.beacon_interval));
621 }
622}
623
624static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
625 u16 capab_info, u8 *pwr_constr_elem,
626 u8 pwr_constr_elem_len)
627{
628 struct ieee80211_conf *conf = &sdata->local->hw.conf;
629
630 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
631 return;
632
633 /* Power constraint IE length should be 1 octet */
634 if (pwr_constr_elem_len != 1)
635 return;
636
637 if ((*pwr_constr_elem <= conf->channel->max_power) &&
638 (*pwr_constr_elem != sdata->local->power_constr_level)) {
639 sdata->local->power_constr_level = *pwr_constr_elem;
640 ieee80211_hw_config(sdata->local, 0);
641 }
642}
643
965bedad
JB		 644/* powersave */
645static void ieee80211_enable_ps(struct ieee80211_local *local,
646 struct ieee80211_sub_if_data *sdata)
647{
648 struct ieee80211_conf *conf = &local->hw.conf;
649
d5edaedc
JB		 650 /*
651 * If we are scanning right now then the parameters will
652 * take effect when scan finishes.
653 */
fbe9c429 654 if (local->scanning)
d5edaedc
JB		 655 return;
656
965bedad
JB		 657 if (conf->dynamic_ps_timeout > 0 &&
658 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
659 mod_timer(&local->dynamic_ps_timer, jiffies +
660 msecs_to_jiffies(conf->dynamic_ps_timeout));
661 } else {
662 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
663 ieee80211_send_nullfunc(local, sdata, 1);
664 conf->flags |= IEEE80211_CONF_PS;
665 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
666 }
667}
668
669static void ieee80211_change_ps(struct ieee80211_local *local)
670{
671 struct ieee80211_conf *conf = &local->hw.conf;
672
673 if (local->ps_sdata) {
965bedad
JB		 674 ieee80211_enable_ps(local, local->ps_sdata);
675 } else if (conf->flags & IEEE80211_CONF_PS) {
676 conf->flags &= ~IEEE80211_CONF_PS;
677 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
678 del_timer_sync(&local->dynamic_ps_timer);
679 cancel_work_sync(&local->dynamic_ps_enable_work);
680 }
681}
682
683/* need to hold RTNL or interface lock */
10f644a4 684void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 685{
686 struct ieee80211_sub_if_data *sdata, *found = NULL;
687 int count = 0;
688
689 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
690 local->ps_sdata = NULL;
691 return;
692 }
693
694 list_for_each_entry(sdata, &local->interfaces, list) {
695 if (!netif_running(sdata->dev))
696 continue;
697 if (sdata->vif.type != NL80211_IFTYPE_STATION)
698 continue;
699 found = sdata;
700 count++;
701 }
702
43f78531 703 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 704 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 705 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
706 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 707 s32 beaconint_us;
708
709 if (latency < 0)
710 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
711
712 beaconint_us = ieee80211_tu_to_usec(
713 found->vif.bss_conf.beacon_int);
714
04fe2037 715 if (beaconint_us > latency) {
10f644a4 716 local->ps_sdata = NULL;
04fe2037
JB		 717 } else {
718 u8 dtimper = found->vif.bss_conf.dtim_period;
719 int maxslp = 1;
720
721 if (dtimper > 1)
722 maxslp = min_t(int, dtimper,
723 latency / beaconint_us);
724
9ccebe61 725 local->hw.conf.max_sleep_period = maxslp;
10f644a4 726 local->ps_sdata = found;
04fe2037 727 }
10f644a4 728 } else {
965bedad 729 local->ps_sdata = NULL;
10f644a4 730 }
965bedad
JB		 731
732 ieee80211_change_ps(local);
733}
734
735void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
736{
737 struct ieee80211_local *local =
738 container_of(work, struct ieee80211_local,
739 dynamic_ps_disable_work);
740
741 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
742 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
743 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
744 }
745
746 ieee80211_wake_queues_by_reason(&local->hw,
747 IEEE80211_QUEUE_STOP_REASON_PS);
748}
749
750void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
751{
752 struct ieee80211_local *local =
753 container_of(work, struct ieee80211_local,
754 dynamic_ps_enable_work);
755 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
756
757 /* can only happen when PS was just disabled anyway */
758 if (!sdata)
759 return;
760
761 if (local->hw.conf.flags & IEEE80211_CONF_PS)
762 return;
763
764 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
765 ieee80211_send_nullfunc(local, sdata, 1);
766
767 local->hw.conf.flags |= IEEE80211_CONF_PS;
768 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
769}
770
771void ieee80211_dynamic_ps_timer(unsigned long data)
772{
773 struct ieee80211_local *local = (void *) data;
774
78f1a8b7 775 if (local->quiescing || local->suspended)
5bb644a0
JB		 776 return;
777
42935eca 778 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 779}
780
60f8b39c 781/* MLME */
f698d856 782static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 783 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 784 u8 *wmm_param, size_t wmm_param_len)
785{
f0706e82
JB		 786 struct ieee80211_tx_queue_params params;
787 size_t left;
788 int count;
789 u8 *pos;
790
46900298 791 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 792 return;
793
794 if (!wmm_param)
795 return;
796
f0706e82
JB		 797 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
798 return;
799 count = wmm_param[6] & 0x0f;
46900298 800 if (count == ifmgd->wmm_last_param_set)
f0706e82 801 return;
46900298 802 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 803
804 pos = wmm_param + 8;
805 left = wmm_param_len - 8;
806
807 memset(&params, 0, sizeof(params));
808
f0706e82
JB		 809 local->wmm_acm = 0;
810 for (; left >= 4; left -= 4, pos += 4) {
811 int aci = (pos[0] >> 5) & 0x03;
812 int acm = (pos[0] >> 4) & 0x01;
813 int queue;
814
815 switch (aci) {
0eeb59fe 816 case 1: /* AC_BK */
e100bb64 817 queue = 3;
988c0f72 818 if (acm)
0eeb59fe 819 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 820 break;
0eeb59fe 821 case 2: /* AC_VI */
e100bb64 822 queue = 1;
988c0f72 823 if (acm)
0eeb59fe 824 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 825 break;
0eeb59fe 826 case 3: /* AC_VO */
e100bb64 827 queue = 0;
988c0f72 828 if (acm)
0eeb59fe 829 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 830 break;
0eeb59fe 831 case 0: /* AC_BE */
f0706e82 832 default:
e100bb64 833 queue = 2;
988c0f72 834 if (acm)
0eeb59fe 835 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 836 break;
837 }
838
839 params.aifs = pos[0] & 0x0f;
840 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
841 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 842 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 843#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 844 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 845 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 846 wiphy_name(local->hw.wiphy), queue, aci, acm,
847 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 848#endif
24487981 849 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 850 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 851 "parameters for queue %d\n",
852 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 853 }
854}
855
7a5158ef
JB		 856static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
857 u16 capab, bool erp_valid, u8 erp)
5628221c 858{
bda3933a 859 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 860 u32 changed = 0;
7a5158ef
JB		 861 bool use_protection;
862 bool use_short_preamble;
863 bool use_short_slot;
864
865 if (erp_valid) {
866 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
867 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
868 } else {
869 use_protection = false;
870 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
871 }
872
873 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 874
471b3efd 875 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 876 bss_conf->use_cts_prot = use_protection;
877 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 878 }
7e9ed188 879
d43c7b37 880 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 881 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 882 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 883 }
d9430a32 884
7a5158ef 885 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 886 bss_conf->use_short_slot = use_short_slot;
887 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 888 }
889
890 return changed;
891}
892
f698d856 893static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
e21546a2 894 struct ieee80211_mgd_work *wk,
ae5eb026 895 u32 bss_info_changed)
f0706e82 896{
471b3efd 897 struct ieee80211_local *local = sdata->local;
e21546a2 898 struct ieee80211_bss *bss = wk->bss;
d6f2da5b 899
ae5eb026 900 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 901 /* set timing information */
902 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
903 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
904 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 905
77fdaa12
JB		 906 bss_info_changed |= BSS_CHANGED_BEACON_INT;
907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
908 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 909
77fdaa12 910 sdata->u.mgd.associated = bss;
e21546a2 911 sdata->u.mgd.old_associate_work = wk;
77fdaa12 912 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 913
b291ba11
JB		 914 /* just to be sure */
915 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
916 IEEE80211_STA_BEACON_POLL);
917
9ac19a90 918 ieee80211_led_assoc(local, 1);
9306102e 919
bda3933a 920 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 921 /*
922 * For now just always ask the driver to update the basic rateset
923 * when we have associated, we aren't checking whether it actually
924 * changed or not.
925 */
ae5eb026 926 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 927
928 /* And the BSSID changed - we're associated now */
929 bss_info_changed |= BSS_CHANGED_BSSID;
930
ae5eb026 931 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 932
056508dc
JB		 933 mutex_lock(&local->iflist_mtx);
934 ieee80211_recalc_ps(local, -1);
935 mutex_unlock(&local->iflist_mtx);
e0cb686f 936
53623f1a 937 netif_start_queue(sdata->dev);
9ac19a90 938 netif_carrier_on(sdata->dev);
f0706e82
JB		 939}
940
77fdaa12
JB		 941static enum rx_mgmt_action __must_check
942ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
943 struct ieee80211_mgd_work *wk)
f0706e82 944{
46900298 945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 946 struct ieee80211_local *local = sdata->local;
46900298 947
77fdaa12
JB		 948 wk->tries++;
949 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 950 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 951 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 952
953 /*
954 * Most likely AP is not in the range so remove the
77fdaa12 955 * bss struct for that AP.
7a947080 956 */
77fdaa12 957 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 958
959 /*
960 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 961 * due to work needing to be done. Hence, queue the STAs work
962 * again for that.
11432379 963 */
42935eca 964 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 965 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 966 }
f0706e82 967
77fdaa12
JB		 968 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
969 sdata->dev->name, wk->bss->cbss.bssid,
970 wk->tries);
f0706e82 971
77fdaa12
JB		 972 /*
973 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 974 * will not answer to direct packet in unassociated state.
975 */
77fdaa12
JB		 976 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
977
978 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 979 run_again(ifmgd, wk->timeout);
9ac19a90 980
77fdaa12 981 return RX_MGMT_NONE;
60f8b39c 982}
f0706e82 983
9ac19a90 984
77fdaa12
JB		 985static enum rx_mgmt_action __must_check
986ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
987 struct ieee80211_mgd_work *wk)
f0706e82 988{
46900298 989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 990 struct ieee80211_local *local = sdata->local;
46900298 991
77fdaa12
JB		 992 wk->tries++;
993 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 994 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 995 " timed out\n",
77fdaa12
JB		 996 sdata->dev->name, wk->bss->cbss.bssid);
997
998 /*
999 * Most likely AP is not in the range so remove the
1000 * bss struct for that AP.
1001 */
1002 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1003
1004 /*
1005 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1006 * due to work needing to be done. Hence, queue the STAs work
1007 * again for that.
11432379 1008 */
42935eca 1009 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1010 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1011 }
f0706e82 1012
77fdaa12
JB		 1013 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1014 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1015
1016 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1017 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1018 wk->auth_transaction = 2;
f0706e82 1019
77fdaa12 1020 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1021 run_again(ifmgd, wk->timeout);
9ac19a90 1022
77fdaa12 1023 return RX_MGMT_NONE;
f0706e82
JB		 1024}
1025
e21546a2
JB		 1026static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1027 bool deauth)
aa458d17 1028{
46900298 1029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1030 struct ieee80211_local *local = sdata->local;
1031 struct sta_info *sta;
e0cb686f 1032 u32 changed = 0, config_changed = 0;
b291ba11 1033 u8 bssid[ETH_ALEN];
aa458d17 1034
77fdaa12
JB		 1035 ASSERT_MGD_MTX(ifmgd);
1036
b291ba11
JB		 1037 if (WARN_ON(!ifmgd->associated))
1038 return;
1039
1040 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1041
77fdaa12
JB		 1042 ifmgd->associated = NULL;
1043 memset(ifmgd->bssid, 0, ETH_ALEN);
1044
e21546a2
JB		 1045 if (deauth) {
1046 kfree(ifmgd->old_associate_work);
1047 ifmgd->old_associate_work = NULL;
1048 } else {
1049 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1050
1051 wk->state = IEEE80211_MGD_STATE_IDLE;
1052 list_add(&wk->list, &ifmgd->work_list);
1053 }
1054
77fdaa12
JB		 1055 /*
1056 * we need to commit the associated = NULL change because the
1057 * scan code uses that to determine whether this iface should
1058 * go to/wake up from powersave or not -- and could otherwise
1059 * wake the queues erroneously.
1060 */
1061 smp_mb();
1062
1063 /*
1064 * Thus, we can only afterwards stop the queues -- to account
1065 * for the case where another CPU is finishing a scan at this
1066 * time -- we don't want the scan code to enable queues.
1067 */
aa458d17 1068
53623f1a 1069 netif_stop_queue(sdata->dev);
aa458d17
TW		 1070 netif_carrier_off(sdata->dev);
1071
1fa6f4af 1072 rcu_read_lock();
77fdaa12 1073 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1074 if (sta)
1075 ieee80211_sta_tear_down_BA_sessions(sta);
1076 rcu_read_unlock();
aa458d17 1077
f5e5bf25
TW		 1078 changed |= ieee80211_reset_erp_info(sdata);
1079
f5e5bf25 1080 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1081 changed |= BSS_CHANGED_ASSOC;
1082 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1083
aa837e1d
JB		 1084 ieee80211_set_wmm_default(sdata);
1085
4797938c 1086 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1087 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1088
413ad50a
JB		 1089 /* on the next assoc, re-program HT parameters */
1090 sdata->ht_opmode_valid = false;
1091
a8302de9
VT		 1092 local->power_constr_level = 0;
1093
520eb820
KV		 1094 del_timer_sync(&local->dynamic_ps_timer);
1095 cancel_work_sync(&local->dynamic_ps_enable_work);
1096
e0cb686f
KV		 1097 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1098 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1099 config_changed |= IEEE80211_CONF_CHANGE_PS;
1100 }
ae5eb026 1101
e0cb686f 1102 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1103
1104 /* And the BSSID changed -- not very interesting here */
1105 changed |= BSS_CHANGED_BSSID;
ae5eb026 1106 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1107
1108 rcu_read_lock();
1109
77fdaa12 1110 sta = sta_info_get(local, bssid);
8e268e47
TW		 1111 if (!sta) {
1112 rcu_read_unlock();
1113 return;
1114 }
1115
1116 sta_info_unlink(&sta);
1117
1118 rcu_read_unlock();
1119
1120 sta_info_destroy(sta);
aa458d17 1121}
f0706e82 1122
77fdaa12
JB		 1123static enum rx_mgmt_action __must_check
1124ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1125 struct ieee80211_mgd_work *wk)
f0706e82 1126{
46900298 1127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1128 struct ieee80211_local *local = sdata->local;
46900298 1129
77fdaa12
JB		 1130 wk->tries++;
1131 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1132 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1133 " timed out\n",
77fdaa12
JB		 1134 sdata->dev->name, wk->bss->cbss.bssid);
1135
1136 /*
1137 * Most likely AP is not in the range so remove the
1138 * bss struct for that AP.
1139 */
1140 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1141
11432379
HS		 1142 /*
1143 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1144 * due to work needing to be done. Hence, queue the STAs work
1145 * again for that.
11432379 1146 */
42935eca 1147 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1148 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1149 }
1150
77fdaa12
JB		 1151 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1152 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1153 ieee80211_send_assoc(sdata, wk);
1154
1155 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1156 run_again(ifmgd, wk->timeout);
f0706e82 1157
77fdaa12 1158 return RX_MGMT_NONE;
f0706e82
JB		 1159}
1160
3cf335d5
KV		 1161void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1162 struct ieee80211_hdr *hdr)
1163{
1164 /*
1165 * We can postpone the mgd.timer whenever receiving unicast frames
1166 * from AP because we know that the connection is working both ways
1167 * at that time. But multicast frames (and hence also beacons) must
1168 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1169 * data idle periods for sending the periodic probe request to the
1170 * AP we're connected to.
3cf335d5 1171 */
b291ba11
JB		 1172 if (is_multicast_ether_addr(hdr->addr1))
1173 return;
1174
1175 mod_timer(&sdata->u.mgd.conn_mon_timer,
1176 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1177}
f0706e82 1178
a43abf29
ML		 1179static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1180{
1181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1182 const u8 *ssid;
1183
1184 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1185 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1186 ssid + 2, ssid[1], NULL, 0);
1187
1188 ifmgd->probe_send_count++;
1189 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1190 run_again(ifmgd, ifmgd->probe_timeout);
1191}
1192
b291ba11
JB		 1193static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1194 bool beacon)
04de8381 1195{
04de8381 1196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1197 bool already = false;
34bfc411 1198
0e2b6286
JB		 1199 if (!netif_running(sdata->dev))
1200 return;
1201
91a3bd76
LR		 1202 if (sdata->local->scanning)
1203 return;
1204
77fdaa12
JB		 1205 mutex_lock(&ifmgd->mtx);
1206
1207 if (!ifmgd->associated)
1208 goto out;
1209
a860402d 1210#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1211 if (beacon && net_ratelimit())
1212 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1213 "- sending probe request\n", sdata->dev->name);
a860402d 1214#endif
04de8381 1215
b291ba11
JB		 1216 /*
1217 * The driver/our work has already reported this event or the
1218 * connection monitoring has kicked in and we have already sent
1219 * a probe request. Or maybe the AP died and the driver keeps
1220 * reporting until we disassociate...
1221 *
1222 * In either case we have to ignore the current call to this
1223 * function (except for setting the correct probe reason bit)
1224 * because otherwise we would reset the timer every time and
1225 * never check whether we received a probe response!
1226 */
1227 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1228 IEEE80211_STA_CONNECTION_POLL))
1229 already = true;
1230
1231 if (beacon)
1232 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1233 else
1234 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1235
1236 if (already)
1237 goto out;
1238
4e751843
JB		 1239 mutex_lock(&sdata->local->iflist_mtx);
1240 ieee80211_recalc_ps(sdata->local, -1);
1241 mutex_unlock(&sdata->local->iflist_mtx);
1242
a43abf29
ML		 1243 ifmgd->probe_send_count = 0;
1244 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1245 out:
1246 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1247}
1248
b291ba11
JB		 1249void ieee80211_beacon_loss_work(struct work_struct *work)
1250{
1251 struct ieee80211_sub_if_data *sdata =
1252 container_of(work, struct ieee80211_sub_if_data,
1253 u.mgd.beacon_loss_work);
1254
1255 ieee80211_mgd_probe_ap(sdata, true);
1256}
1257
04de8381
KV		 1258void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1259{
1260 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1261
42935eca 1262 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1263}
1264EXPORT_SYMBOL(ieee80211_beacon_loss);
1265
77fdaa12
JB		 1266static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1267 struct ieee80211_mgd_work *wk)
f0706e82 1268{
77fdaa12 1269 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1270 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1271}
1272
1273
f698d856 1274static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1275 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1276 struct ieee80211_mgmt *mgmt,
1277 size_t len)
1278{
1279 u8 *pos;
1280 struct ieee802_11_elems elems;
1281
f0706e82 1282 pos = mgmt->u.auth.variable;
67a4cce4 1283 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1284 if (!elems.challenge)
f0706e82 1285 return;
77fdaa12 1286 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1287 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1288 wk->bss->cbss.bssid,
1289 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1290 wk->auth_transaction = 4;
fe3d2c3f
JB		 1291}
1292
77fdaa12
JB		 1293static enum rx_mgmt_action __must_check
1294ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1295 struct ieee80211_mgd_work *wk,
1296 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1297{
f0706e82
JB		 1298 u16 auth_alg, auth_transaction, status_code;
1299
77fdaa12
JB		 1300 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1301 return RX_MGMT_NONE;
f0706e82 1302
f4ea83dd 1303 if (len < 24 + 6)
77fdaa12 1304 return RX_MGMT_NONE;
f0706e82 1305
77fdaa12
JB		 1306 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1307 return RX_MGMT_NONE;
f0706e82 1308
77fdaa12
JB		 1309 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1310 return RX_MGMT_NONE;
f0706e82
JB		 1311
1312 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1313 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1314 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1315
77fdaa12
JB		 1316 if (auth_alg != wk->auth_alg ||
1317 auth_transaction != wk->auth_transaction)
1318 return RX_MGMT_NONE;
f0706e82
JB		 1319
1320 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1321 list_del(&wk->list);
1322 kfree(wk);
1323 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1324 }
1325
77fdaa12 1326 switch (wk->auth_alg) {
f0706e82
JB		 1327 case WLAN_AUTH_OPEN:
1328 case WLAN_AUTH_LEAP:
636a5d36 1329 case WLAN_AUTH_FT:
77fdaa12
JB		 1330 ieee80211_auth_completed(sdata, wk);
1331 return RX_MGMT_CFG80211_AUTH;
f0706e82 1332 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1333 if (wk->auth_transaction == 4) {
1334 ieee80211_auth_completed(sdata, wk);
1335 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1336 } else
77fdaa12 1337 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1338 break;
1339 }
77fdaa12
JB		 1340
1341 return RX_MGMT_NONE;
f0706e82
JB		 1342}
1343
1344
77fdaa12
JB		 1345static enum rx_mgmt_action __must_check
1346ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1347 struct ieee80211_mgd_work *wk,
1348 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1349{
46900298 1350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1351 const u8 *bssid = NULL;
f0706e82
JB		 1352 u16 reason_code;
1353
f4ea83dd 1354 if (len < 24 + 2)
77fdaa12 1355 return RX_MGMT_NONE;
f0706e82 1356
77fdaa12
JB		 1357 ASSERT_MGD_MTX(ifmgd);
1358
1359 if (wk)
1360 bssid = wk->bss->cbss.bssid;
1361 else
1362 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1363
1364 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1365
77fdaa12
JB		 1366 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1367 sdata->dev->name, bssid, reason_code);
1368
1369 if (!wk) {
e21546a2 1370 ieee80211_set_disassoc(sdata, true);
bc83b681 1371 ieee80211_recalc_idle(sdata->local);
77fdaa12
JB		 1372 } else {
1373 list_del(&wk->list);
1374 kfree(wk);
1375 }
f0706e82 1376
77fdaa12 1377 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1378}
1379
1380
77fdaa12
JB		 1381static enum rx_mgmt_action __must_check
1382ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1383 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1384{
46900298 1385 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1386 u16 reason_code;
1387
f4ea83dd 1388 if (len < 24 + 2)
77fdaa12 1389 return RX_MGMT_NONE;
f0706e82 1390
77fdaa12
JB		 1391 ASSERT_MGD_MTX(ifmgd);
1392
1393 if (WARN_ON(!ifmgd->associated))
1394 return RX_MGMT_NONE;
1395
1396 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1397 return RX_MGMT_NONE;
f0706e82
JB		 1398
1399 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1400
0ff71613
JB		 1401 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1402 sdata->dev->name, mgmt->sa, reason_code);
f0706e82 1403
e21546a2 1404 ieee80211_set_disassoc(sdata, false);
bc83b681 1405 ieee80211_recalc_idle(sdata->local);
77fdaa12 1406 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1407}
1408
1409
77fdaa12
JB		 1410static enum rx_mgmt_action __must_check
1411ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1412 struct ieee80211_mgd_work *wk,
1413 struct ieee80211_mgmt *mgmt, size_t len,
1414 bool reassoc)
f0706e82 1415{
46900298 1416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1417 struct ieee80211_local *local = sdata->local;
8318d78a 1418 struct ieee80211_supported_band *sband;
f0706e82 1419 struct sta_info *sta;
881d948c 1420 u32 rates, basic_rates;
f0706e82
JB		 1421 u16 capab_info, status_code, aid;
1422 struct ieee802_11_elems elems;
bda3933a 1423 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1424 u8 *pos;
ae5eb026 1425 u32 changed = 0;
f0706e82 1426 int i, j;
ddf4ac53 1427 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1428 u16 ap_ht_cap_flags;
f0706e82 1429
77fdaa12
JB		 1430 /*
1431 * AssocResp and ReassocResp have identical structure, so process both
1432 * of them in this function.
1433 */
f0706e82 1434
f4ea83dd 1435 if (len < 24 + 6)
77fdaa12 1436 return RX_MGMT_NONE;
f0706e82 1437
77fdaa12
JB		 1438 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1439 return RX_MGMT_NONE;
f0706e82
JB		 1440
1441 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1442 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1443 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1444
0c68ae26 1445 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1446 "status=%d aid=%d)\n",
0c68ae26 1447 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1448 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1449
63a5ab82
JM		 1450 pos = mgmt->u.assoc_resp.variable;
1451 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1452
1453 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1454 elems.timeout_int && elems.timeout_int_len == 5 &&
1455 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1456 u32 tu, ms;
f797eb7e 1457 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1458 ms = tu * 1024 / 1000;
1459 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1460 "comeback duration %u TU (%u ms)\n",
1461 sdata->dev->name, tu, ms);
77fdaa12 1462 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1463 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1464 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1465 return RX_MGMT_NONE;
63a5ab82
JM		 1466 }
1467
f0706e82
JB		 1468 if (status_code != WLAN_STATUS_SUCCESS) {
1469 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1470 sdata->dev->name, status_code);
2ef6e444 1471 wk->state = IEEE80211_MGD_STATE_IDLE;
77fdaa12 1472 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1473 }
1474
1dd84aa2
JB		 1475 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1476 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1477 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1478 aid &= ~(BIT(15) | BIT(14));
1479
f0706e82
JB		 1480 if (!elems.supp_rates) {
1481 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1482 sdata->dev->name);
77fdaa12 1483 return RX_MGMT_NONE;
f0706e82
JB		 1484 }
1485
f698d856 1486 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1487 ifmgd->aid = aid;
f0706e82 1488
d0709a65
JB		 1489 rcu_read_lock();
1490
f0706e82 1491 /* Add STA entry for the AP */
77fdaa12 1492 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1493 if (!sta) {
ddf4ac53 1494 newsta = true;
d0709a65 1495
77fdaa12
JB		 1496 rcu_read_unlock();
1497
1498 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1499 if (!sta) {
1500 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1501 " the AP\n", sdata->dev->name);
77fdaa12 1502 return RX_MGMT_NONE;
f0706e82 1503 }
f709fc69 1504
77fdaa12
JB		 1505 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1506 WLAN_STA_ASSOC_AP);
1507 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1508 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1509
77fdaa12
JB		 1510 rcu_read_lock();
1511 }
05e5e883 1512
60f8b39c
JB		 1513 rates = 0;
1514 basic_rates = 0;
1515 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1516
60f8b39c
JB		 1517 for (i = 0; i < elems.supp_rates_len; i++) {
1518 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1519 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1520
60f8b39c
JB		 1521 if (rate > 110)
1522 have_higher_than_11mbit = true;
1523
1524 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1525 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1526 rates |= BIT(j);
d61272cb
TW		 1527 if (is_basic)
1528 basic_rates |= BIT(j);
1529 break;
1530 }
f709fc69 1531 }
f709fc69
LCC		 1532 }
1533
60f8b39c
JB		 1534 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1535 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1536 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1537
60f8b39c
JB		 1538 if (rate > 110)
1539 have_higher_than_11mbit = true;
f0706e82 1540
60f8b39c 1541 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1542 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1543 rates |= BIT(j);
d61272cb
TW		 1544 if (is_basic)
1545 basic_rates |= BIT(j);
1546 break;
1547 }
60f8b39c 1548 }
1ebebea8 1549 }
f0706e82 1550
323ce79a 1551 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1552 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1553
1554 /* cf. IEEE 802.11 9.2.12 */
1555 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1556 have_higher_than_11mbit)
1557 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1558 else
1559 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1560
ab1faead 1561 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1562 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1563 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1564
1565 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1566
4b7679a5 1567 rate_control_rate_init(sta);
f0706e82 1568
46900298 1569 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1570 set_sta_flags(sta, WLAN_STA_MFP);
1571
ddf4ac53 1572 if (elems.wmm_param)
60f8b39c 1573 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1574
1575 if (newsta) {
1576 int err = sta_info_insert(sta);
1577 if (err) {
1578 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1579 " the AP (error %d)\n", sdata->dev->name, err);
1580 rcu_read_unlock();
77fdaa12 1581 return RX_MGMT_NONE;
ddf4ac53
JB		 1582 }
1583 }
1584
1585 rcu_read_unlock();
1586
1587 if (elems.wmm_param)
46900298 1588 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1589 elems.wmm_param_len);
aa837e1d
JB		 1590 else
1591 ieee80211_set_wmm_default(sdata);
f0706e82 1592
ae5eb026 1593 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1594 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1595 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1596 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1597 wk->bss->cbss.bssid,
ae5eb026
JB		 1598 ap_ht_cap_flags);
1599
056508dc
JB		 1600 /* delete work item -- must be before set_associated for PS */
1601 list_del(&wk->list);
1602
60f8b39c
JB		 1603 /* set AID and assoc capability,
1604 * ieee80211_set_associated() will tell the driver */
1605 bss_conf->aid = aid;
1606 bss_conf->assoc_capability = capab_info;
e21546a2
JB		 1607 /* this will take ownership of wk */
1608 ieee80211_set_associated(sdata, wk, changed);
f0706e82 1609
15b7b062 1610 /*
b291ba11
JB		 1611 * Start timer to probe the connection to the AP now.
1612 * Also start the timer that will detect beacon loss.
15b7b062 1613 */
b291ba11
JB		 1614 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1615 mod_beacon_timer(sdata);
15b7b062 1616
77fdaa12 1617 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1618}
1619
1620
98c8fccf
JB		 1621static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1622 struct ieee80211_mgmt *mgmt,
1623 size_t len,
1624 struct ieee80211_rx_status *rx_status,
1625 struct ieee802_11_elems *elems,
1626 bool beacon)
1627{
1628 struct ieee80211_local *local = sdata->local;
1629 int freq;
c2b13452 1630 struct ieee80211_bss *bss;
98c8fccf 1631 struct ieee80211_channel *channel;
98c8fccf
JB		 1632
1633 if (elems->ds_params && elems->ds_params_len == 1)
1634 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1635 else
1636 freq = rx_status->freq;
1637
1638 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1639
1640 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1641 return;
1642
98c8fccf 1643 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1644 channel, beacon);
77fdaa12
JB		 1645 if (bss)
1646 ieee80211_rx_bss_put(local, bss);
1647
1648 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1649 return;
1650
c481ec97 1651 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1652 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1653 ETH_ALEN) == 0)) {
c481ec97
S		 1654 struct ieee80211_channel_sw_ie *sw_elem =
1655 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1656 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1657 }
f0706e82
JB		 1658}
1659
1660
f698d856 1661static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1662 struct ieee80211_mgd_work *wk,
1663 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1664 struct ieee80211_rx_status *rx_status)
1665{
15b7b062 1666 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1667 size_t baselen;
1668 struct ieee802_11_elems elems;
1669
15b7b062
KV		 1670 ifmgd = &sdata->u.mgd;
1671
77fdaa12
JB		 1672 ASSERT_MGD_MTX(ifmgd);
1673
8e7cdbb6
TW		 1674 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1675 return; /* ignore ProbeResp to foreign address */
1676
ae6a44e3
EK		 1677 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1678 if (baselen > len)
1679 return;
1680
1681 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1682 &elems);
1683
98c8fccf 1684 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1685
1686 /* direct probe may be part of the association flow */
77fdaa12 1687 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
0ff71613 1688 printk(KERN_DEBUG "%s: direct probe responded\n",
9859b81e 1689 sdata->dev->name);
77fdaa12
JB		 1690 wk->tries = 0;
1691 wk->state = IEEE80211_MGD_STATE_AUTH;
1692 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1693 }
15b7b062 1694
77fdaa12
JB		 1695 if (ifmgd->associated &&
1696 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1697 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1698 IEEE80211_STA_CONNECTION_POLL)) {
1699 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1700 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1701 mutex_lock(&sdata->local->iflist_mtx);
1702 ieee80211_recalc_ps(sdata->local, -1);
1703 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1704 /*
1705 * We've received a probe response, but are not sure whether
1706 * we have or will be receiving any beacons or data, so let's
1707 * schedule the timers again, just in case.
1708 */
1709 mod_beacon_timer(sdata);
1710 mod_timer(&ifmgd->conn_mon_timer,
1711 round_jiffies_up(jiffies +
1712 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1713 }
f0706e82
JB		 1714}
1715
d91f36db
JB		 1716/*
1717 * This is the canonical list of information elements we care about,
1718 * the filter code also gives us all changes to the Microsoft OUI
1719 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1720 *
1721 * We implement beacon filtering in software since that means we can
1722 * avoid processing the frame here and in cfg80211, and userspace
1723 * will not be able to tell whether the hardware supports it or not.
1724 *
1725 * XXX: This list needs to be dynamic -- userspace needs to be able to
1726 * add items it requires. It also needs to be able to tell us to
1727 * look out for other vendor IEs.
1728 */
1729static const u64 care_about_ies =
1d4df3a5
JB		 1730 (1ULL << WLAN_EID_COUNTRY) |
1731 (1ULL << WLAN_EID_ERP_INFO) |
1732 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1733 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1734 (1ULL << WLAN_EID_HT_CAPABILITY) |
1735 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1736
f698d856 1737static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1738 struct ieee80211_mgmt *mgmt,
1739 size_t len,
1740 struct ieee80211_rx_status *rx_status)
1741{
d91f36db 1742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1743 size_t baselen;
1744 struct ieee802_11_elems elems;
f698d856 1745 struct ieee80211_local *local = sdata->local;
471b3efd 1746 u32 changed = 0;
d91f36db 1747 bool erp_valid, directed_tim = false;
7a5158ef 1748 u8 erp_value = 0;
d91f36db 1749 u32 ncrc;
77fdaa12
JB		 1750 u8 *bssid;
1751
1752 ASSERT_MGD_MTX(ifmgd);
f0706e82 1753
ae6a44e3
EK		 1754 /* Process beacon from the current BSS */
1755 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1756 if (baselen > len)
1757 return;
1758
d91f36db 1759 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1760 return;
f0706e82 1761
b291ba11
JB		 1762 /*
1763 * We might have received a number of frames, among them a
1764 * disassoc frame and a beacon...
1765 */
1766 if (!ifmgd->associated)
77fdaa12
JB		 1767 return;
1768
1769 bssid = ifmgd->associated->cbss.bssid;
1770
b291ba11
JB		 1771 /*
1772 * And in theory even frames from a different AP we were just
1773 * associated to a split-second ago!
1774 */
1775 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1776 return;
1777
b291ba11 1778 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1779#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1780 if (net_ratelimit()) {
1781 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1782 "to a received beacon\n", sdata->dev->name);
1783 }
1784#endif
b291ba11 1785 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1786 mutex_lock(&local->iflist_mtx);
1787 ieee80211_recalc_ps(local, -1);
1788 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1789 }
1790
b291ba11
JB		 1791 /*
1792 * Push the beacon loss detection into the future since
1793 * we are processing a beacon from the AP just now.
1794 */
1795 mod_beacon_timer(sdata);
1796
d91f36db
JB		 1797 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1798 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1799 len - baselen, &elems,
1800 care_about_ies, ncrc);
1801
1802 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1803 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1804 ifmgd->aid);
d91f36db 1805
30196673
JM		 1806 if (ncrc != ifmgd->beacon_crc) {
1807 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1808 true);
d91f36db 1809
30196673
JM		 1810 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1811 elems.wmm_param_len);
1812 }
fe3fa827 1813
25c9c875 1814 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1815 if (directed_tim) {
572e0012
KV		 1816 if (local->hw.conf.dynamic_ps_timeout > 0) {
1817 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1818 ieee80211_hw_config(local,
1819 IEEE80211_CONF_CHANGE_PS);
1820 ieee80211_send_nullfunc(local, sdata, 0);
1821 } else {
1822 local->pspolling = true;
1823
1824 /*
1825 * Here is assumed that the driver will be
1826 * able to send ps-poll frame and receive a
1827 * response even though power save mode is
1828 * enabled, but some drivers might require
1829 * to disable power save here. This needs
1830 * to be investigated.
1831 */
1832 ieee80211_send_pspoll(local, sdata);
1833 }
a97b77b9
VN		 1834 }
1835 }
7a5158ef 1836
30196673
JM		 1837 if (ncrc == ifmgd->beacon_crc)
1838 return;
1839 ifmgd->beacon_crc = ncrc;
1840
7a5158ef
JB		 1841 if (elems.erp_info && elems.erp_info_len >= 1) {
1842 erp_valid = true;
1843 erp_value = elems.erp_info[0];
1844 } else {
1845 erp_valid = false;
50c4afb9 1846 }
7a5158ef
JB		 1847 changed |= ieee80211_handle_bss_capability(sdata,
1848 le16_to_cpu(mgmt->u.beacon.capab_info),
1849 erp_valid, erp_value);
f0706e82 1850
d3c990fb 1851
53d6f81c 1852 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1853 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1854 struct sta_info *sta;
1855 struct ieee80211_supported_band *sband;
1856 u16 ap_ht_cap_flags;
1857
1858 rcu_read_lock();
1859
77fdaa12
JB		 1860 sta = sta_info_get(local, bssid);
1861 if (WARN_ON(!sta)) {
ae5eb026
JB		 1862 rcu_read_unlock();
1863 return;
1864 }
1865
1866 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1867
1868 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1869 elems.ht_cap_elem, &sta->sta.ht_cap);
1870
1871 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1872
1873 rcu_read_unlock();
1874
1875 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1876 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1877 }
1878
8b19e6ca 1879 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1880 if (elems.country_elem) {
a8302de9
VT		 1881 /* TODO: IBSS also needs this */
1882 if (elems.pwr_constr_elem)
1883 ieee80211_handle_pwr_constr(sdata,
1884 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1885 elems.pwr_constr_elem,
1886 elems.pwr_constr_elem_len);
3f2355cb
LR		 1887 }
1888
471b3efd 1889 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1890}
1891
46900298 1892ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1893 struct sk_buff *skb)
f0706e82 1894{
f698d856 1895 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1896 struct ieee80211_mgmt *mgmt;
1897 u16 fc;
1898
1899 if (skb->len < 24)
46900298 1900 return RX_DROP_MONITOR;
f0706e82
JB		 1901
1902 mgmt = (struct ieee80211_mgmt *) skb->data;
1903 fc = le16_to_cpu(mgmt->frame_control);
1904
1905 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1906 case IEEE80211_STYPE_PROBE_RESP:
1907 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1908 case IEEE80211_STYPE_AUTH:
1909 case IEEE80211_STYPE_ASSOC_RESP:
1910 case IEEE80211_STYPE_REASSOC_RESP:
1911 case IEEE80211_STYPE_DEAUTH:
1912 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1913 case IEEE80211_STYPE_ACTION:
46900298 1914 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1915 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1916 return RX_QUEUED;
f0706e82
JB		 1917 }
1918
46900298 1919 return RX_DROP_MONITOR;
f0706e82
JB		 1920}
1921
f698d856 1922static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1923 struct sk_buff *skb)
1924{
77fdaa12 1925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1926 struct ieee80211_rx_status *rx_status;
f0706e82 1927 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1928 struct ieee80211_mgd_work *wk;
1929 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1930 u16 fc;
1931
f0706e82
JB		 1932 rx_status = (struct ieee80211_rx_status *) skb->cb;
1933 mgmt = (struct ieee80211_mgmt *) skb->data;
1934 fc = le16_to_cpu(mgmt->frame_control);
1935
77fdaa12
JB		 1936 mutex_lock(&ifmgd->mtx);
1937
1938 if (ifmgd->associated &&
1939 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1940 ETH_ALEN) == 0) {
1941 switch (fc & IEEE80211_FCTL_STYPE) {
1942 case IEEE80211_STYPE_BEACON:
1943 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1944 rx_status);
1945 break;
1946 case IEEE80211_STYPE_PROBE_RESP:
1947 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1948 skb->len, rx_status);
1949 break;
1950 case IEEE80211_STYPE_DEAUTH:
1951 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1952 mgmt, skb->len);
1953 break;
1954 case IEEE80211_STYPE_DISASSOC:
1955 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1956 break;
1957 case IEEE80211_STYPE_ACTION:
1958 /* XXX: differentiate, can only happen for CSA now! */
1959 ieee80211_sta_process_chanswitch(sdata,
1960 &mgmt->u.action.u.chan_switch.sw_elem,
1961 ifmgd->associated);
1962 break;
1963 }
1964 mutex_unlock(&ifmgd->mtx);
1965
1966 switch (rma) {
1967 case RX_MGMT_NONE:
1968 /* no action */
1969 break;
1970 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1971 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1972 break;
1973 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1974 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1975 break;
1976 default:
1977 WARN(1, "unexpected: %d", rma);
1978 }
1979 goto out;
1980 }
1981
1982 list_for_each_entry(wk, &ifmgd->work_list, list) {
1983 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1984 continue;
1985
1986 switch (fc & IEEE80211_FCTL_STYPE) {
1987 case IEEE80211_STYPE_PROBE_RESP:
1988 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1989 rx_status);
1990 break;
1991 case IEEE80211_STYPE_AUTH:
1992 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1993 break;
1994 case IEEE80211_STYPE_ASSOC_RESP:
1995 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1996 skb->len, false);
1997 break;
1998 case IEEE80211_STYPE_REASSOC_RESP:
1999 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2000 skb->len, true);
2001 break;
2002 case IEEE80211_STYPE_DEAUTH:
2003 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2004 skb->len);
2005 break;
2006 }
2007 /*
2008 * We've processed this frame for that work, so it can't
2009 * belong to another work struct.
2010 * NB: this is also required for correctness because the
2011 * called functions can free 'wk', and for 'rma'!
2012 */
46900298 2013 break;
77fdaa12
JB		 2014 }
2015
2016 mutex_unlock(&ifmgd->mtx);
2017
2018 switch (rma) {
2019 case RX_MGMT_NONE:
2020 /* no action */
46900298 2021 break;
77fdaa12 2022 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2023 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2024 break;
77fdaa12 2025 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2026 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2027 break;
8d8b261a 2028 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2029 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2030 break;
77fdaa12
JB		 2031 default:
2032 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2033 }
2034
77fdaa12 2035 out:
f0706e82
JB		 2036 kfree_skb(skb);
2037}
2038
9c6bd790 2039static void ieee80211_sta_timer(unsigned long data)
f0706e82 2040{
60f8b39c
JB		 2041 struct ieee80211_sub_if_data *sdata =
2042 (struct ieee80211_sub_if_data *) data;
46900298 2043 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2044 struct ieee80211_local *local = sdata->local;
f0706e82 2045
5bb644a0
JB		 2046 if (local->quiescing) {
2047 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2048 return;
2049 }
2050
42935eca 2051 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2052}
2053
9c6bd790
JB		 2054static void ieee80211_sta_work(struct work_struct *work)
2055{
2056 struct ieee80211_sub_if_data *sdata =
46900298 2057 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2058 struct ieee80211_local *local = sdata->local;
46900298 2059 struct ieee80211_if_managed *ifmgd;
9c6bd790 2060 struct sk_buff *skb;
77fdaa12
JB		 2061 struct ieee80211_mgd_work *wk, *tmp;
2062 LIST_HEAD(free_work);
2063 enum rx_mgmt_action rma;
2064 bool anybusy = false;
9c6bd790
JB		 2065
2066 if (!netif_running(sdata->dev))
2067 return;
2068
fbe9c429 2069 if (local->scanning)
9c6bd790
JB		 2070 return;
2071
46900298 2072 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2073 return;
5bb644a0
JB		 2074
2075 /*
42935eca
LR		 2076 * ieee80211_queue_work() should have picked up most cases,
2077 * here we'll pick the the rest.
5bb644a0 2078 */
42935eca
LR		 2079 if (WARN(local->suspended, "STA MLME work scheduled while "
2080 "going to suspend\n"))
5bb644a0
JB		 2081 return;
2082
46900298 2083 ifmgd = &sdata->u.mgd;
f0706e82 2084
77fdaa12 2085 /* first process frames to avoid timing out while a frame is pending */
46900298 2086 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2087 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2088
77fdaa12
JB		 2089 /* then process the rest of the work */
2090 mutex_lock(&ifmgd->mtx);
2091
b291ba11
JB		 2092 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2093 IEEE80211_STA_CONNECTION_POLL) &&
2094 ifmgd->associated) {
a43abf29
ML		 2095 u8 bssid[ETH_ALEN];
2096
2097 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2098 if (time_is_after_jiffies(ifmgd->probe_timeout))
2099 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2100
2101 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2102#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2103 printk(KERN_DEBUG "No probe response from AP %pM"
2104 " after %dms, try %d\n", bssid,
2105 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2106 ifmgd->probe_send_count);
2107#endif
2108 ieee80211_mgd_probe_ap_send(sdata);
2109 } else {
b291ba11
JB		 2110 /*
2111 * We actually lost the connection ... or did we?
2112 * Let's make sure!
2113 */
2114 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2115 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2116 printk(KERN_DEBUG "No probe response from AP %pM"
2117 " after %dms, disconnecting.\n",
2118 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e21546a2 2119 ieee80211_set_disassoc(sdata, true);
bc83b681 2120 ieee80211_recalc_idle(local);
b291ba11
JB		 2121 mutex_unlock(&ifmgd->mtx);
2122 /*
2123 * must be outside lock due to cfg80211,
2124 * but that's not a problem.
2125 */
2126 ieee80211_send_deauth_disassoc(sdata, bssid,
2127 IEEE80211_STYPE_DEAUTH,
2128 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2129 NULL);
2130 mutex_lock(&ifmgd->mtx);
2131 }
2132 }
2133
f0706e82 2134
77fdaa12
JB		 2135 ieee80211_recalc_idle(local);
2136
77fdaa12 2137 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2138 if (time_is_after_jiffies(wk->timeout)) {
2139 /*
2140 * This work item isn't supposed to be worked on
2141 * right now, but take care to adjust the timer
2142 * properly.
2143 */
2144 run_again(ifmgd, wk->timeout);
77fdaa12 2145 continue;
ca386f31 2146 }
5cff20e6 2147
77fdaa12
JB		 2148 switch (wk->state) {
2149 default:
2150 WARN_ON(1);
2151 /* fall through */
2152 case IEEE80211_MGD_STATE_IDLE:
2153 /* nothing */
2154 rma = RX_MGMT_NONE;
2155 break;
2156 case IEEE80211_MGD_STATE_PROBE:
2157 rma = ieee80211_direct_probe(sdata, wk);
2158 break;
2159 case IEEE80211_MGD_STATE_AUTH:
2160 rma = ieee80211_authenticate(sdata, wk);
2161 break;
2162 case IEEE80211_MGD_STATE_ASSOC:
2163 rma = ieee80211_associate(sdata, wk);
2164 break;
2165 }
2166
2167 switch (rma) {
2168 case RX_MGMT_NONE:
2169 /* no action required */
2170 break;
2171 case RX_MGMT_CFG80211_AUTH_TO:
2172 case RX_MGMT_CFG80211_ASSOC_TO:
2173 list_del(&wk->list);
2174 list_add(&wk->list, &free_work);
2175 wk->tries = rma; /* small abuse but only local */
2176 break;
2177 default:
2178 WARN(1, "unexpected: %d", rma);
2179 }
2180 }
2181
5bf6fcc2
JM		 2182 list_for_each_entry(wk, &ifmgd->work_list, list) {
2183 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2184 anybusy = true;
2185 break;
2186 }
2187 }
2188 if (!anybusy &&
2189 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2190 ieee80211_queue_delayed_work(&local->hw,
2191 &local->scan_work,
2192 round_jiffies_relative(0));
2193
77fdaa12
JB		 2194 mutex_unlock(&ifmgd->mtx);
2195
2196 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2197 switch (wk->tries) {
2198 case RX_MGMT_CFG80211_AUTH_TO:
2199 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2200 wk->bss->cbss.bssid);
77fdaa12
JB		 2201 break;
2202 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2203 cfg80211_send_assoc_timeout(sdata->dev,
2204 wk->bss->cbss.bssid);
77fdaa12
JB		 2205 break;
2206 default:
2207 WARN(1, "unexpected: %d", wk->tries);
2208 }
2209
2210 list_del(&wk->list);
2211 kfree(wk);
9c6bd790 2212 }
77fdaa12
JB		 2213
2214 ieee80211_recalc_idle(local);
f0706e82
JB		 2215}
2216
b291ba11
JB		 2217static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2218{
2219 struct ieee80211_sub_if_data *sdata =
2220 (struct ieee80211_sub_if_data *) data;
2221 struct ieee80211_local *local = sdata->local;
2222
2223 if (local->quiescing)
2224 return;
2225
42935eca 2226 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2227}
2228
2229static void ieee80211_sta_conn_mon_timer(unsigned long data)
2230{
2231 struct ieee80211_sub_if_data *sdata =
2232 (struct ieee80211_sub_if_data *) data;
2233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2234 struct ieee80211_local *local = sdata->local;
2235
2236 if (local->quiescing)
2237 return;
2238
42935eca 2239 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2240}
2241
2242static void ieee80211_sta_monitor_work(struct work_struct *work)
2243{
2244 struct ieee80211_sub_if_data *sdata =
2245 container_of(work, struct ieee80211_sub_if_data,
2246 u.mgd.monitor_work);
2247
2248 ieee80211_mgd_probe_ap(sdata, false);
2249}
2250
9c6bd790
JB		 2251static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2252{
ad935687 2253 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2254 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2255 IEEE80211_STA_CONNECTION_POLL);
ad935687 2256
b291ba11 2257 /* let's probe the connection once */
42935eca 2258 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2259 &sdata->u.mgd.monitor_work);
2260 /* and do all the other regular work too */
42935eca 2261 ieee80211_queue_work(&sdata->local->hw,
46900298 2262 &sdata->u.mgd.work);
ad935687 2263 }
9c6bd790 2264}
f0706e82 2265
5bb644a0
JB		 2266#ifdef CONFIG_PM
2267void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2268{
2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2270
2271 /*
2272 * we need to use atomic bitops for the running bits
2273 * only because both timers might fire at the same
2274 * time -- the code here is properly synchronised.
2275 */
2276
2277 cancel_work_sync(&ifmgd->work);
2278 cancel_work_sync(&ifmgd->beacon_loss_work);
2279 if (del_timer_sync(&ifmgd->timer))
2280 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2281
2282 cancel_work_sync(&ifmgd->chswitch_work);
2283 if (del_timer_sync(&ifmgd->chswitch_timer))
2284 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2285
2286 cancel_work_sync(&ifmgd->monitor_work);
2287 /* these will just be re-established on connection */
2288 del_timer_sync(&ifmgd->conn_mon_timer);
2289 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2290}
2291
2292void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2293{
2294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2295
2296 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2297 add_timer(&ifmgd->timer);
2298 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2299 add_timer(&ifmgd->chswitch_timer);
2300}
2301#endif
2302
9c6bd790
JB		 2303/* interface setup */
2304void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2305{
46900298 2306 struct ieee80211_if_managed *ifmgd;
988c0f72 2307
46900298
JB		 2308 ifmgd = &sdata->u.mgd;
2309 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2310 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2311 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2312 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2313 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2314 (unsigned long) sdata);
b291ba11
JB		 2315 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2316 (unsigned long) sdata);
2317 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2318 (unsigned long) sdata);
46900298 2319 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2320 (unsigned long) sdata);
46900298 2321 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2322
77fdaa12
JB		 2323 INIT_LIST_HEAD(&ifmgd->work_list);
2324
46900298 2325 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2326 ifmgd->flags = 0;
176be728 2327 if (sdata->local->hw.queues >= 4)
46900298 2328 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2329
77fdaa12 2330 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2331}
2332
77fdaa12
JB		 2333/* scan finished notification */
2334void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2335{
77fdaa12 2336 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2337
77fdaa12
JB		 2338 /* Restart STA timers */
2339 rcu_read_lock();
2340 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2341 ieee80211_restart_sta_timer(sdata);
2342 rcu_read_unlock();
2343}
60f8b39c 2344
77fdaa12
JB		 2345int ieee80211_max_network_latency(struct notifier_block *nb,
2346 unsigned long data, void *dummy)
2347{
2348 s32 latency_usec = (s32) data;
2349 struct ieee80211_local *local =
2350 container_of(nb, struct ieee80211_local,
2351 network_latency_notifier);
1fa6f4af 2352
77fdaa12
JB		 2353 mutex_lock(&local->iflist_mtx);
2354 ieee80211_recalc_ps(local, latency_usec);
2355 mutex_unlock(&local->iflist_mtx);
dfe67012 2356
77fdaa12 2357 return 0;
9c6bd790
JB		 2358}
2359
77fdaa12
JB		 2360/* config hooks */
2361int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2362 struct cfg80211_auth_request *req)
9c6bd790 2363{
46900298 2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2365 const u8 *ssid;
2366 struct ieee80211_mgd_work *wk;
2367 u16 auth_alg;
9c6bd790 2368
77fdaa12
JB		 2369 switch (req->auth_type) {
2370 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2371 auth_alg = WLAN_AUTH_OPEN;
2372 break;
2373 case NL80211_AUTHTYPE_SHARED_KEY:
2374 auth_alg = WLAN_AUTH_SHARED_KEY;
2375 break;
2376 case NL80211_AUTHTYPE_FT:
2377 auth_alg = WLAN_AUTH_FT;
2378 break;
2379 case NL80211_AUTHTYPE_NETWORK_EAP:
2380 auth_alg = WLAN_AUTH_LEAP;
2381 break;
2382 default:
2383 return -EOPNOTSUPP;
60f8b39c 2384 }
77fdaa12
JB		 2385
2386 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2387 if (!wk)
9c6bd790 2388 return -ENOMEM;
77fdaa12
JB		 2389
2390 wk->bss = (void *)req->bss;
2391
2392 if (req->ie && req->ie_len) {
2393 memcpy(wk->ie, req->ie, req->ie_len);
2394 wk->ie_len = req->ie_len;
9c6bd790 2395 }
77fdaa12 2396
fffd0934
JB		 2397 if (req->key && req->key_len) {
2398 wk->key_len = req->key_len;
2399 wk->key_idx = req->key_idx;
2400 memcpy(wk->key, req->key, req->key_len);
2401 }
2402
77fdaa12
JB		 2403 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2404 memcpy(wk->ssid, ssid + 2, ssid[1]);
2405 wk->ssid_len = ssid[1];
2406
2407 wk->state = IEEE80211_MGD_STATE_PROBE;
2408 wk->auth_alg = auth_alg;
48531847 2409 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2410
2411 /*
2412 * XXX: if still associated need to tell AP that we're going
2413 * to sleep and then change channel etc.
2414 */
2415 sdata->local->oper_channel = req->bss->channel;
2416 ieee80211_hw_config(sdata->local, 0);
2417
2418 mutex_lock(&ifmgd->mtx);
2419 list_add(&wk->list, &sdata->u.mgd.work_list);
2420 mutex_unlock(&ifmgd->mtx);
2421
42935eca 2422 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2423 return 0;
60f8b39c
JB		 2424}
2425
77fdaa12
JB		 2426int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2427 struct cfg80211_assoc_request *req)
f0706e82 2428{
77fdaa12
JB		 2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2430 struct ieee80211_mgd_work *wk, *found = NULL;
2431 int i, err;
f0706e82 2432
77fdaa12
JB		 2433 mutex_lock(&ifmgd->mtx);
2434
2435 list_for_each_entry(wk, &ifmgd->work_list, list) {
2436 if (&wk->bss->cbss == req->bss &&
2437 wk->state == IEEE80211_MGD_STATE_IDLE) {
2438 found = wk;
2439 break;
2440 }
2441 }
2442
2443 if (!found) {
2444 err = -ENOLINK;
2445 goto out;
2446 }
2447
2448 list_del(&found->list);
2449
2450 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2451 if (!wk) {
2452 list_add(&found->list, &ifmgd->work_list);
2453 err = -ENOMEM;
2454 goto out;
2455 }
2456
2457 list_add(&wk->list, &ifmgd->work_list);
2458
2459 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2460
2461 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2462 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2463 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2464 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2465 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2466
2467 sdata->local->oper_channel = req->bss->channel;
2468 ieee80211_hw_config(sdata->local, 0);
2469
2470 if (req->ie && req->ie_len) {
2471 memcpy(wk->ie, req->ie, req->ie_len);
2472 wk->ie_len = req->ie_len;
2473 } else
2474 wk->ie_len = 0;
2475
2476 if (req->prev_bssid)
2477 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2478
2479 wk->state = IEEE80211_MGD_STATE_ASSOC;
2480 wk->tries = 0;
48531847 2481 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2482
2483 if (req->use_mfp) {
2484 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2485 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2486 } else {
2487 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2488 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2489 }
2490
2491 if (req->crypto.control_port)
2492 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2493 else
2494 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2495
42935eca 2496 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2497
2498 err = 0;
2499
2500 out:
2501 mutex_unlock(&ifmgd->mtx);
2502 return err;
f0706e82
JB		 2503}
2504
77fdaa12 2505int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2506 struct cfg80211_deauth_request *req,
2507 void *cookie)
f0706e82 2508{
46900298 2509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2510 struct ieee80211_mgd_work *wk;
2511 const u8 *bssid = NULL;
a58ce43f 2512 bool not_auth_yet = false;
f0706e82 2513
77fdaa12
JB		 2514 mutex_lock(&ifmgd->mtx);
2515
2516 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2517 bssid = req->bss->bssid;
e21546a2 2518 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 2519 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2520 if (&wk->bss->cbss == req->bss) {
2521 bssid = req->bss->bssid;
a58ce43f
JB		 2522 if (wk->state == IEEE80211_MGD_STATE_PROBE)
2523 not_auth_yet = true;
77fdaa12
JB		 2524 list_del(&wk->list);
2525 kfree(wk);
2526 break;
2527 }
2528 }
f0706e82 2529
a58ce43f
JB		 2530 /*
2531 * If somebody requests authentication and we haven't
2532 * sent out an auth frame yet there's no need to send
2533 * out a deauth frame either. If the state was PROBE,
2534 * then this is the case. If it's AUTH we have sent a
2535 * frame, and if it's IDLE we have completed the auth
2536 * process already.
2537 */
2538 if (not_auth_yet) {
2539 mutex_unlock(&ifmgd->mtx);
2540 __cfg80211_auth_canceled(sdata->dev, bssid);
2541 return 0;
2542 }
2543
8d8b261a
JB		 2544 /*
2545 * cfg80211 should catch this ... but it's racy since
2546 * we can receive a deauth frame, process it, hand it
2547 * to cfg80211 while that's in a locked section already
2548 * trying to tell us that the user wants to disconnect.
2549 */
2550 if (!bssid) {
77fdaa12 2551 mutex_unlock(&ifmgd->mtx);
46900298 2552 return -ENOLINK;
77fdaa12
JB		 2553 }
2554
2555 mutex_unlock(&ifmgd->mtx);
2556
0ff71613
JB		 2557 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2558 sdata->dev->name, bssid, req->reason_code);
2559
77fdaa12 2560 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2561 IEEE80211_STYPE_DEAUTH, req->reason_code,
2562 cookie);
f0706e82 2563
bc83b681
JB		 2564 ieee80211_recalc_idle(sdata->local);
2565
f0706e82
JB		 2566 return 0;
2567}
84363e6e 2568
77fdaa12 2569int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2570 struct cfg80211_disassoc_request *req,
2571 void *cookie)
9c6bd790 2572{
77fdaa12 2573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2574
77fdaa12 2575 mutex_lock(&ifmgd->mtx);
10f644a4 2576
8d8b261a
JB		 2577 /*
2578 * cfg80211 should catch this ... but it's racy since
2579 * we can receive a disassoc frame, process it, hand it
2580 * to cfg80211 while that's in a locked section already
2581 * trying to tell us that the user wants to disconnect.
2582 */
2583 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2584 mutex_unlock(&ifmgd->mtx);
2585 return -ENOLINK;
2586 }
2587
0ff71613
JB		 2588 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2589 sdata->dev->name, req->bss->bssid, req->reason_code);
2590
e21546a2 2591 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2592
2593 mutex_unlock(&ifmgd->mtx);
10f644a4 2594
77fdaa12 2595 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2596 IEEE80211_STYPE_DISASSOC, req->reason_code,
2597 cookie);
bc83b681
JB		 2598
2599 ieee80211_recalc_idle(sdata->local);
2600
10f644a4
JB		 2601 return 0;
2602}
Linux 6.x block layer and io_uring tree(s)