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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[deliverable/linux.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
0183826b
JB		 918 /*
919 * Always handle WMM once after association regardless
920 * of the first value the AP uses. Setting -1 here has
921 * that effect because the AP values is an unsigned
922 * 4-bit value.
923 */
924 sdata->u.mgd.wmm_last_param_set = -1;
925
9ac19a90 926 ieee80211_led_assoc(local, 1);
9306102e 927
bda3933a 928 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 929 /*
930 * For now just always ask the driver to update the basic rateset
931 * when we have associated, we aren't checking whether it actually
932 * changed or not.
933 */
ae5eb026 934 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 935
936 /* And the BSSID changed - we're associated now */
937 bss_info_changed |= BSS_CHANGED_BSSID;
938
ae5eb026 939 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 940
056508dc
JB		 941 mutex_lock(&local->iflist_mtx);
942 ieee80211_recalc_ps(local, -1);
943 mutex_unlock(&local->iflist_mtx);
e0cb686f 944
8a5b33f5 945 netif_tx_start_all_queues(sdata->dev);
9ac19a90 946 netif_carrier_on(sdata->dev);
f0706e82
JB		 947}
948
77fdaa12
JB		 949static enum rx_mgmt_action __must_check
950ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
951 struct ieee80211_mgd_work *wk)
f0706e82 952{
46900298 953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 954 struct ieee80211_local *local = sdata->local;
46900298 955
77fdaa12
JB		 956 wk->tries++;
957 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 958 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 959 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 960
961 /*
962 * Most likely AP is not in the range so remove the
77fdaa12 963 * bss struct for that AP.
7a947080 964 */
77fdaa12 965 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 966
967 /*
968 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 969 * due to work needing to be done. Hence, queue the STAs work
970 * again for that.
11432379 971 */
42935eca 972 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 973 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 974 }
f0706e82 975
77fdaa12
JB		 976 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
977 sdata->dev->name, wk->bss->cbss.bssid,
978 wk->tries);
f0706e82 979
77fdaa12
JB		 980 /*
981 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 982 * will not answer to direct packet in unassociated state.
983 */
77fdaa12
JB		 984 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
985
986 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 987 run_again(ifmgd, wk->timeout);
9ac19a90 988
77fdaa12 989 return RX_MGMT_NONE;
60f8b39c 990}
f0706e82 991
9ac19a90 992
77fdaa12
JB		 993static enum rx_mgmt_action __must_check
994ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
995 struct ieee80211_mgd_work *wk)
f0706e82 996{
46900298 997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 998 struct ieee80211_local *local = sdata->local;
46900298 999
77fdaa12
JB		 1000 wk->tries++;
1001 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1002 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 1003 " timed out\n",
77fdaa12
JB		 1004 sdata->dev->name, wk->bss->cbss.bssid);
1005
1006 /*
1007 * Most likely AP is not in the range so remove the
1008 * bss struct for that AP.
1009 */
1010 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1011
1012 /*
1013 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1014 * due to work needing to be done. Hence, queue the STAs work
1015 * again for that.
11432379 1016 */
42935eca 1017 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1018 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1019 }
f0706e82 1020
77fdaa12
JB		 1021 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1022 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1023
1024 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1025 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1026 wk->auth_transaction = 2;
f0706e82 1027
77fdaa12 1028 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1029 run_again(ifmgd, wk->timeout);
9ac19a90 1030
77fdaa12 1031 return RX_MGMT_NONE;
f0706e82
JB		 1032}
1033
e21546a2
JB		 1034static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1035 bool deauth)
aa458d17 1036{
46900298 1037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1038 struct ieee80211_local *local = sdata->local;
1039 struct sta_info *sta;
e0cb686f 1040 u32 changed = 0, config_changed = 0;
b291ba11 1041 u8 bssid[ETH_ALEN];
aa458d17 1042
77fdaa12
JB		 1043 ASSERT_MGD_MTX(ifmgd);
1044
b291ba11
JB		 1045 if (WARN_ON(!ifmgd->associated))
1046 return;
1047
1048 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1049
77fdaa12
JB		 1050 ifmgd->associated = NULL;
1051 memset(ifmgd->bssid, 0, ETH_ALEN);
1052
e21546a2
JB		 1053 if (deauth) {
1054 kfree(ifmgd->old_associate_work);
1055 ifmgd->old_associate_work = NULL;
1056 } else {
1057 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1058
1059 wk->state = IEEE80211_MGD_STATE_IDLE;
1060 list_add(&wk->list, &ifmgd->work_list);
1061 }
1062
77fdaa12
JB		 1063 /*
1064 * we need to commit the associated = NULL change because the
1065 * scan code uses that to determine whether this iface should
1066 * go to/wake up from powersave or not -- and could otherwise
1067 * wake the queues erroneously.
1068 */
1069 smp_mb();
1070
1071 /*
1072 * Thus, we can only afterwards stop the queues -- to account
1073 * for the case where another CPU is finishing a scan at this
1074 * time -- we don't want the scan code to enable queues.
1075 */
aa458d17 1076
8a5b33f5 1077 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1078 netif_carrier_off(sdata->dev);
1079
1fa6f4af 1080 rcu_read_lock();
77fdaa12 1081 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1082 if (sta)
1083 ieee80211_sta_tear_down_BA_sessions(sta);
1084 rcu_read_unlock();
aa458d17 1085
f5e5bf25
TW		 1086 changed |= ieee80211_reset_erp_info(sdata);
1087
f5e5bf25 1088 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1089 changed |= BSS_CHANGED_ASSOC;
1090 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1091
aa837e1d
JB		 1092 ieee80211_set_wmm_default(sdata);
1093
4797938c 1094 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1095 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1096
413ad50a
JB		 1097 /* on the next assoc, re-program HT parameters */
1098 sdata->ht_opmode_valid = false;
1099
a8302de9
VT		 1100 local->power_constr_level = 0;
1101
520eb820
KV		 1102 del_timer_sync(&local->dynamic_ps_timer);
1103 cancel_work_sync(&local->dynamic_ps_enable_work);
1104
e0cb686f
KV		 1105 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1106 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1107 config_changed |= IEEE80211_CONF_CHANGE_PS;
1108 }
ae5eb026 1109
e0cb686f 1110 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1111
1112 /* And the BSSID changed -- not very interesting here */
1113 changed |= BSS_CHANGED_BSSID;
ae5eb026 1114 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1115
1116 rcu_read_lock();
1117
77fdaa12 1118 sta = sta_info_get(local, bssid);
8e268e47
TW		 1119 if (!sta) {
1120 rcu_read_unlock();
1121 return;
1122 }
1123
1124 sta_info_unlink(&sta);
1125
1126 rcu_read_unlock();
1127
1128 sta_info_destroy(sta);
aa458d17 1129}
f0706e82 1130
77fdaa12
JB		 1131static enum rx_mgmt_action __must_check
1132ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1133 struct ieee80211_mgd_work *wk)
f0706e82 1134{
46900298 1135 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1136 struct ieee80211_local *local = sdata->local;
46900298 1137
77fdaa12
JB		 1138 wk->tries++;
1139 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1140 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1141 " timed out\n",
77fdaa12
JB		 1142 sdata->dev->name, wk->bss->cbss.bssid);
1143
1144 /*
1145 * Most likely AP is not in the range so remove the
1146 * bss struct for that AP.
1147 */
1148 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1149
11432379
HS		 1150 /*
1151 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1152 * due to work needing to be done. Hence, queue the STAs work
1153 * again for that.
11432379 1154 */
42935eca 1155 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1156 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1157 }
1158
77fdaa12
JB		 1159 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1160 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1161 ieee80211_send_assoc(sdata, wk);
1162
1163 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1164 run_again(ifmgd, wk->timeout);
f0706e82 1165
77fdaa12 1166 return RX_MGMT_NONE;
f0706e82
JB		 1167}
1168
3cf335d5
KV		 1169void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1170 struct ieee80211_hdr *hdr)
1171{
1172 /*
1173 * We can postpone the mgd.timer whenever receiving unicast frames
1174 * from AP because we know that the connection is working both ways
1175 * at that time. But multicast frames (and hence also beacons) must
1176 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1177 * data idle periods for sending the periodic probe request to the
1178 * AP we're connected to.
3cf335d5 1179 */
b291ba11
JB		 1180 if (is_multicast_ether_addr(hdr->addr1))
1181 return;
1182
1183 mod_timer(&sdata->u.mgd.conn_mon_timer,
1184 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1185}
f0706e82 1186
a43abf29
ML		 1187static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1188{
1189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1190 const u8 *ssid;
1191
1192 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1193 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1194 ssid + 2, ssid[1], NULL, 0);
1195
1196 ifmgd->probe_send_count++;
1197 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1198 run_again(ifmgd, ifmgd->probe_timeout);
1199}
1200
b291ba11
JB		 1201static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1202 bool beacon)
04de8381 1203{
04de8381 1204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1205 bool already = false;
34bfc411 1206
0e2b6286
JB		 1207 if (!netif_running(sdata->dev))
1208 return;
1209
91a3bd76
LR		 1210 if (sdata->local->scanning)
1211 return;
1212
77fdaa12
JB		 1213 mutex_lock(&ifmgd->mtx);
1214
1215 if (!ifmgd->associated)
1216 goto out;
1217
a860402d 1218#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1219 if (beacon && net_ratelimit())
1220 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1221 "- sending probe request\n", sdata->dev->name);
a860402d 1222#endif
04de8381 1223
b291ba11
JB		 1224 /*
1225 * The driver/our work has already reported this event or the
1226 * connection monitoring has kicked in and we have already sent
1227 * a probe request. Or maybe the AP died and the driver keeps
1228 * reporting until we disassociate...
1229 *
1230 * In either case we have to ignore the current call to this
1231 * function (except for setting the correct probe reason bit)
1232 * because otherwise we would reset the timer every time and
1233 * never check whether we received a probe response!
1234 */
1235 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1236 IEEE80211_STA_CONNECTION_POLL))
1237 already = true;
1238
1239 if (beacon)
1240 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1241 else
1242 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1243
1244 if (already)
1245 goto out;
1246
4e751843
JB		 1247 mutex_lock(&sdata->local->iflist_mtx);
1248 ieee80211_recalc_ps(sdata->local, -1);
1249 mutex_unlock(&sdata->local->iflist_mtx);
1250
a43abf29
ML		 1251 ifmgd->probe_send_count = 0;
1252 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1253 out:
1254 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1255}
1256
b291ba11
JB		 1257void ieee80211_beacon_loss_work(struct work_struct *work)
1258{
1259 struct ieee80211_sub_if_data *sdata =
1260 container_of(work, struct ieee80211_sub_if_data,
1261 u.mgd.beacon_loss_work);
1262
1263 ieee80211_mgd_probe_ap(sdata, true);
1264}
1265
04de8381
KV		 1266void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1267{
1268 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1269
42935eca 1270 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1271}
1272EXPORT_SYMBOL(ieee80211_beacon_loss);
1273
77fdaa12
JB		 1274static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1275 struct ieee80211_mgd_work *wk)
f0706e82 1276{
77fdaa12 1277 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1278 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1279}
1280
1281
f698d856 1282static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1283 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1284 struct ieee80211_mgmt *mgmt,
1285 size_t len)
1286{
1287 u8 *pos;
1288 struct ieee802_11_elems elems;
1289
f0706e82 1290 pos = mgmt->u.auth.variable;
67a4cce4 1291 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1292 if (!elems.challenge)
f0706e82 1293 return;
77fdaa12 1294 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1295 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1296 wk->bss->cbss.bssid,
1297 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1298 wk->auth_transaction = 4;
fe3d2c3f
JB		 1299}
1300
77fdaa12
JB		 1301static enum rx_mgmt_action __must_check
1302ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1303 struct ieee80211_mgd_work *wk,
1304 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1305{
f0706e82
JB		 1306 u16 auth_alg, auth_transaction, status_code;
1307
77fdaa12
JB		 1308 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1309 return RX_MGMT_NONE;
f0706e82 1310
f4ea83dd 1311 if (len < 24 + 6)
77fdaa12 1312 return RX_MGMT_NONE;
f0706e82 1313
77fdaa12
JB		 1314 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1315 return RX_MGMT_NONE;
f0706e82 1316
77fdaa12
JB		 1317 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1318 return RX_MGMT_NONE;
f0706e82
JB		 1319
1320 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1321 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1322 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1323
77fdaa12
JB		 1324 if (auth_alg != wk->auth_alg ||
1325 auth_transaction != wk->auth_transaction)
1326 return RX_MGMT_NONE;
f0706e82
JB		 1327
1328 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1329 list_del(&wk->list);
1330 kfree(wk);
1331 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1332 }
1333
77fdaa12 1334 switch (wk->auth_alg) {
f0706e82
JB		 1335 case WLAN_AUTH_OPEN:
1336 case WLAN_AUTH_LEAP:
636a5d36 1337 case WLAN_AUTH_FT:
77fdaa12
JB		 1338 ieee80211_auth_completed(sdata, wk);
1339 return RX_MGMT_CFG80211_AUTH;
f0706e82 1340 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1341 if (wk->auth_transaction == 4) {
1342 ieee80211_auth_completed(sdata, wk);
1343 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1344 } else
77fdaa12 1345 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1346 break;
1347 }
77fdaa12
JB		 1348
1349 return RX_MGMT_NONE;
f0706e82
JB		 1350}
1351
1352
77fdaa12
JB		 1353static enum rx_mgmt_action __must_check
1354ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1355 struct ieee80211_mgd_work *wk,
1356 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1357{
46900298 1358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1359 const u8 *bssid = NULL;
f0706e82
JB		 1360 u16 reason_code;
1361
f4ea83dd 1362 if (len < 24 + 2)
77fdaa12 1363 return RX_MGMT_NONE;
f0706e82 1364
77fdaa12
JB		 1365 ASSERT_MGD_MTX(ifmgd);
1366
1367 if (wk)
1368 bssid = wk->bss->cbss.bssid;
1369 else
1370 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1371
1372 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1373
77fdaa12
JB		 1374 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1375 sdata->dev->name, bssid, reason_code);
1376
1377 if (!wk) {
e21546a2 1378 ieee80211_set_disassoc(sdata, true);
bc83b681 1379 ieee80211_recalc_idle(sdata->local);
77fdaa12
JB		 1380 } else {
1381 list_del(&wk->list);
1382 kfree(wk);
1383 }
f0706e82 1384
77fdaa12 1385 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1386}
1387
1388
77fdaa12
JB		 1389static enum rx_mgmt_action __must_check
1390ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1391 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1392{
46900298 1393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1394 u16 reason_code;
1395
f4ea83dd 1396 if (len < 24 + 2)
77fdaa12 1397 return RX_MGMT_NONE;
f0706e82 1398
77fdaa12
JB		 1399 ASSERT_MGD_MTX(ifmgd);
1400
1401 if (WARN_ON(!ifmgd->associated))
1402 return RX_MGMT_NONE;
1403
1404 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1405 return RX_MGMT_NONE;
f0706e82
JB		 1406
1407 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1408
0ff71613
JB		 1409 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
1410 sdata->dev->name, mgmt->sa, reason_code);
f0706e82 1411
e21546a2 1412 ieee80211_set_disassoc(sdata, false);
bc83b681 1413 ieee80211_recalc_idle(sdata->local);
77fdaa12 1414 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1415}
1416
1417
77fdaa12
JB		 1418static enum rx_mgmt_action __must_check
1419ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1420 struct ieee80211_mgd_work *wk,
1421 struct ieee80211_mgmt *mgmt, size_t len,
1422 bool reassoc)
f0706e82 1423{
46900298 1424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1425 struct ieee80211_local *local = sdata->local;
8318d78a 1426 struct ieee80211_supported_band *sband;
f0706e82 1427 struct sta_info *sta;
881d948c 1428 u32 rates, basic_rates;
f0706e82
JB		 1429 u16 capab_info, status_code, aid;
1430 struct ieee802_11_elems elems;
bda3933a 1431 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1432 u8 *pos;
ae5eb026 1433 u32 changed = 0;
f0706e82 1434 int i, j;
ddf4ac53 1435 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1436 u16 ap_ht_cap_flags;
f0706e82 1437
77fdaa12
JB		 1438 /*
1439 * AssocResp and ReassocResp have identical structure, so process both
1440 * of them in this function.
1441 */
f0706e82 1442
f4ea83dd 1443 if (len < 24 + 6)
77fdaa12 1444 return RX_MGMT_NONE;
f0706e82 1445
77fdaa12
JB		 1446 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1447 return RX_MGMT_NONE;
f0706e82
JB		 1448
1449 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1450 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1451 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1452
0c68ae26 1453 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1454 "status=%d aid=%d)\n",
0c68ae26 1455 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1456 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1457
63a5ab82
JM		 1458 pos = mgmt->u.assoc_resp.variable;
1459 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1460
1461 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1462 elems.timeout_int && elems.timeout_int_len == 5 &&
1463 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1464 u32 tu, ms;
f797eb7e 1465 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1466 ms = tu * 1024 / 1000;
1467 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1468 "comeback duration %u TU (%u ms)\n",
1469 sdata->dev->name, tu, ms);
77fdaa12 1470 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1471 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1472 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1473 return RX_MGMT_NONE;
63a5ab82
JM		 1474 }
1475
f0706e82
JB		 1476 if (status_code != WLAN_STATUS_SUCCESS) {
1477 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1478 sdata->dev->name, status_code);
2ef6e444 1479 wk->state = IEEE80211_MGD_STATE_IDLE;
77fdaa12 1480 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1481 }
1482
1dd84aa2
JB		 1483 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1484 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1485 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1486 aid &= ~(BIT(15) | BIT(14));
1487
f0706e82
JB		 1488 if (!elems.supp_rates) {
1489 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1490 sdata->dev->name);
77fdaa12 1491 return RX_MGMT_NONE;
f0706e82
JB		 1492 }
1493
f698d856 1494 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1495 ifmgd->aid = aid;
f0706e82 1496
d0709a65
JB		 1497 rcu_read_lock();
1498
f0706e82 1499 /* Add STA entry for the AP */
77fdaa12 1500 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1501 if (!sta) {
ddf4ac53 1502 newsta = true;
d0709a65 1503
77fdaa12
JB		 1504 rcu_read_unlock();
1505
1506 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1507 if (!sta) {
1508 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1509 " the AP\n", sdata->dev->name);
77fdaa12 1510 return RX_MGMT_NONE;
f0706e82 1511 }
f709fc69 1512
77fdaa12
JB		 1513 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1514 WLAN_STA_ASSOC_AP);
1515 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1516 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1517
77fdaa12
JB		 1518 rcu_read_lock();
1519 }
05e5e883 1520
60f8b39c
JB		 1521 rates = 0;
1522 basic_rates = 0;
1523 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1524
60f8b39c
JB		 1525 for (i = 0; i < elems.supp_rates_len; i++) {
1526 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1527 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1528
60f8b39c
JB		 1529 if (rate > 110)
1530 have_higher_than_11mbit = true;
1531
1532 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1533 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1534 rates |= BIT(j);
d61272cb
TW		 1535 if (is_basic)
1536 basic_rates |= BIT(j);
1537 break;
1538 }
f709fc69 1539 }
f709fc69
LCC		 1540 }
1541
60f8b39c
JB		 1542 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1543 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1544 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1545
60f8b39c
JB		 1546 if (rate > 110)
1547 have_higher_than_11mbit = true;
f0706e82 1548
60f8b39c 1549 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1550 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1551 rates |= BIT(j);
d61272cb
TW		 1552 if (is_basic)
1553 basic_rates |= BIT(j);
1554 break;
1555 }
60f8b39c 1556 }
1ebebea8 1557 }
f0706e82 1558
323ce79a 1559 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1560 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1561
1562 /* cf. IEEE 802.11 9.2.12 */
1563 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1564 have_higher_than_11mbit)
1565 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1566 else
1567 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1568
ab1faead 1569 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1570 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1571 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1572
1573 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1574
4b7679a5 1575 rate_control_rate_init(sta);
f0706e82 1576
46900298 1577 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1578 set_sta_flags(sta, WLAN_STA_MFP);
1579
ddf4ac53 1580 if (elems.wmm_param)
60f8b39c 1581 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1582
1583 if (newsta) {
1584 int err = sta_info_insert(sta);
1585 if (err) {
1586 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1587 " the AP (error %d)\n", sdata->dev->name, err);
1588 rcu_read_unlock();
77fdaa12 1589 return RX_MGMT_NONE;
ddf4ac53
JB		 1590 }
1591 }
1592
1593 rcu_read_unlock();
1594
1595 if (elems.wmm_param)
46900298 1596 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1597 elems.wmm_param_len);
aa837e1d
JB		 1598 else
1599 ieee80211_set_wmm_default(sdata);
f0706e82 1600
ae5eb026 1601 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1602 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1603 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1604 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1605 wk->bss->cbss.bssid,
ae5eb026
JB		 1606 ap_ht_cap_flags);
1607
056508dc
JB		 1608 /* delete work item -- must be before set_associated for PS */
1609 list_del(&wk->list);
1610
60f8b39c
JB		 1611 /* set AID and assoc capability,
1612 * ieee80211_set_associated() will tell the driver */
1613 bss_conf->aid = aid;
1614 bss_conf->assoc_capability = capab_info;
e21546a2
JB		 1615 /* this will take ownership of wk */
1616 ieee80211_set_associated(sdata, wk, changed);
f0706e82 1617
15b7b062 1618 /*
b291ba11
JB		 1619 * Start timer to probe the connection to the AP now.
1620 * Also start the timer that will detect beacon loss.
15b7b062 1621 */
b291ba11
JB		 1622 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1623 mod_beacon_timer(sdata);
15b7b062 1624
77fdaa12 1625 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1626}
1627
1628
98c8fccf
JB		 1629static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1630 struct ieee80211_mgmt *mgmt,
1631 size_t len,
1632 struct ieee80211_rx_status *rx_status,
1633 struct ieee802_11_elems *elems,
1634 bool beacon)
1635{
1636 struct ieee80211_local *local = sdata->local;
1637 int freq;
c2b13452 1638 struct ieee80211_bss *bss;
98c8fccf 1639 struct ieee80211_channel *channel;
98c8fccf
JB		 1640
1641 if (elems->ds_params && elems->ds_params_len == 1)
1642 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1643 else
1644 freq = rx_status->freq;
1645
1646 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1647
1648 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1649 return;
1650
98c8fccf 1651 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1652 channel, beacon);
77fdaa12
JB		 1653 if (bss)
1654 ieee80211_rx_bss_put(local, bss);
1655
1656 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1657 return;
1658
c481ec97 1659 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1660 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1661 ETH_ALEN) == 0)) {
c481ec97
S		 1662 struct ieee80211_channel_sw_ie *sw_elem =
1663 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1664 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1665 }
f0706e82
JB		 1666}
1667
1668
f698d856 1669static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1670 struct ieee80211_mgd_work *wk,
1671 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1672 struct ieee80211_rx_status *rx_status)
1673{
15b7b062 1674 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1675 size_t baselen;
1676 struct ieee802_11_elems elems;
1677
15b7b062
KV		 1678 ifmgd = &sdata->u.mgd;
1679
77fdaa12
JB		 1680 ASSERT_MGD_MTX(ifmgd);
1681
8e7cdbb6
TW		 1682 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1683 return; /* ignore ProbeResp to foreign address */
1684
ae6a44e3
EK		 1685 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1686 if (baselen > len)
1687 return;
1688
1689 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1690 &elems);
1691
98c8fccf 1692 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1693
1694 /* direct probe may be part of the association flow */
77fdaa12 1695 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
0ff71613 1696 printk(KERN_DEBUG "%s: direct probe responded\n",
9859b81e 1697 sdata->dev->name);
77fdaa12
JB		 1698 wk->tries = 0;
1699 wk->state = IEEE80211_MGD_STATE_AUTH;
1700 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1701 }
15b7b062 1702
77fdaa12
JB		 1703 if (ifmgd->associated &&
1704 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1705 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1706 IEEE80211_STA_CONNECTION_POLL)) {
1707 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1708 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1709 mutex_lock(&sdata->local->iflist_mtx);
1710 ieee80211_recalc_ps(sdata->local, -1);
1711 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1712 /*
1713 * We've received a probe response, but are not sure whether
1714 * we have or will be receiving any beacons or data, so let's
1715 * schedule the timers again, just in case.
1716 */
1717 mod_beacon_timer(sdata);
1718 mod_timer(&ifmgd->conn_mon_timer,
1719 round_jiffies_up(jiffies +
1720 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1721 }
f0706e82
JB		 1722}
1723
d91f36db
JB		 1724/*
1725 * This is the canonical list of information elements we care about,
1726 * the filter code also gives us all changes to the Microsoft OUI
1727 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1728 *
1729 * We implement beacon filtering in software since that means we can
1730 * avoid processing the frame here and in cfg80211, and userspace
1731 * will not be able to tell whether the hardware supports it or not.
1732 *
1733 * XXX: This list needs to be dynamic -- userspace needs to be able to
1734 * add items it requires. It also needs to be able to tell us to
1735 * look out for other vendor IEs.
1736 */
1737static const u64 care_about_ies =
1d4df3a5
JB		 1738 (1ULL << WLAN_EID_COUNTRY) |
1739 (1ULL << WLAN_EID_ERP_INFO) |
1740 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1741 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1742 (1ULL << WLAN_EID_HT_CAPABILITY) |
1743 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1744
f698d856 1745static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1746 struct ieee80211_mgmt *mgmt,
1747 size_t len,
1748 struct ieee80211_rx_status *rx_status)
1749{
d91f36db 1750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1751 size_t baselen;
1752 struct ieee802_11_elems elems;
f698d856 1753 struct ieee80211_local *local = sdata->local;
471b3efd 1754 u32 changed = 0;
d91f36db 1755 bool erp_valid, directed_tim = false;
7a5158ef 1756 u8 erp_value = 0;
d91f36db 1757 u32 ncrc;
77fdaa12
JB		 1758 u8 *bssid;
1759
1760 ASSERT_MGD_MTX(ifmgd);
f0706e82 1761
ae6a44e3
EK		 1762 /* Process beacon from the current BSS */
1763 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1764 if (baselen > len)
1765 return;
1766
d91f36db 1767 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1768 return;
f0706e82 1769
b291ba11
JB		 1770 /*
1771 * We might have received a number of frames, among them a
1772 * disassoc frame and a beacon...
1773 */
1774 if (!ifmgd->associated)
77fdaa12
JB		 1775 return;
1776
1777 bssid = ifmgd->associated->cbss.bssid;
1778
b291ba11
JB		 1779 /*
1780 * And in theory even frames from a different AP we were just
1781 * associated to a split-second ago!
1782 */
1783 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1784 return;
1785
b291ba11 1786 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1787#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1788 if (net_ratelimit()) {
1789 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1790 "to a received beacon\n", sdata->dev->name);
1791 }
1792#endif
b291ba11 1793 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1794 mutex_lock(&local->iflist_mtx);
1795 ieee80211_recalc_ps(local, -1);
1796 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1797 }
1798
b291ba11
JB		 1799 /*
1800 * Push the beacon loss detection into the future since
1801 * we are processing a beacon from the AP just now.
1802 */
1803 mod_beacon_timer(sdata);
1804
d91f36db
JB		 1805 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1806 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1807 len - baselen, &elems,
1808 care_about_ies, ncrc);
1809
1810 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1811 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1812 ifmgd->aid);
d91f36db 1813
30196673
JM		 1814 if (ncrc != ifmgd->beacon_crc) {
1815 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1816 true);
d91f36db 1817
30196673
JM		 1818 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1819 elems.wmm_param_len);
1820 }
fe3fa827 1821
25c9c875 1822 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1823 if (directed_tim) {
572e0012
KV		 1824 if (local->hw.conf.dynamic_ps_timeout > 0) {
1825 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1826 ieee80211_hw_config(local,
1827 IEEE80211_CONF_CHANGE_PS);
1828 ieee80211_send_nullfunc(local, sdata, 0);
1829 } else {
1830 local->pspolling = true;
1831
1832 /*
1833 * Here is assumed that the driver will be
1834 * able to send ps-poll frame and receive a
1835 * response even though power save mode is
1836 * enabled, but some drivers might require
1837 * to disable power save here. This needs
1838 * to be investigated.
1839 */
1840 ieee80211_send_pspoll(local, sdata);
1841 }
a97b77b9
VN		 1842 }
1843 }
7a5158ef 1844
30196673
JM		 1845 if (ncrc == ifmgd->beacon_crc)
1846 return;
1847 ifmgd->beacon_crc = ncrc;
1848
7a5158ef
JB		 1849 if (elems.erp_info && elems.erp_info_len >= 1) {
1850 erp_valid = true;
1851 erp_value = elems.erp_info[0];
1852 } else {
1853 erp_valid = false;
50c4afb9 1854 }
7a5158ef
JB		 1855 changed |= ieee80211_handle_bss_capability(sdata,
1856 le16_to_cpu(mgmt->u.beacon.capab_info),
1857 erp_valid, erp_value);
f0706e82 1858
d3c990fb 1859
53d6f81c 1860 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1861 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1862 struct sta_info *sta;
1863 struct ieee80211_supported_band *sband;
1864 u16 ap_ht_cap_flags;
1865
1866 rcu_read_lock();
1867
77fdaa12
JB		 1868 sta = sta_info_get(local, bssid);
1869 if (WARN_ON(!sta)) {
ae5eb026
JB		 1870 rcu_read_unlock();
1871 return;
1872 }
1873
1874 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1875
1876 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1877 elems.ht_cap_elem, &sta->sta.ht_cap);
1878
1879 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1880
1881 rcu_read_unlock();
1882
1883 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1884 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1885 }
1886
8b19e6ca 1887 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1888 if (elems.country_elem) {
a8302de9
VT		 1889 /* TODO: IBSS also needs this */
1890 if (elems.pwr_constr_elem)
1891 ieee80211_handle_pwr_constr(sdata,
1892 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1893 elems.pwr_constr_elem,
1894 elems.pwr_constr_elem_len);
3f2355cb
LR		 1895 }
1896
471b3efd 1897 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1898}
1899
46900298 1900ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1901 struct sk_buff *skb)
f0706e82 1902{
f698d856 1903 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1904 struct ieee80211_mgmt *mgmt;
1905 u16 fc;
1906
1907 if (skb->len < 24)
46900298 1908 return RX_DROP_MONITOR;
f0706e82
JB		 1909
1910 mgmt = (struct ieee80211_mgmt *) skb->data;
1911 fc = le16_to_cpu(mgmt->frame_control);
1912
1913 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1914 case IEEE80211_STYPE_PROBE_RESP:
1915 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1916 case IEEE80211_STYPE_AUTH:
1917 case IEEE80211_STYPE_ASSOC_RESP:
1918 case IEEE80211_STYPE_REASSOC_RESP:
1919 case IEEE80211_STYPE_DEAUTH:
1920 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1921 case IEEE80211_STYPE_ACTION:
46900298 1922 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1923 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1924 return RX_QUEUED;
f0706e82
JB		 1925 }
1926
46900298 1927 return RX_DROP_MONITOR;
f0706e82
JB		 1928}
1929
f698d856 1930static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1931 struct sk_buff *skb)
1932{
77fdaa12 1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1934 struct ieee80211_rx_status *rx_status;
f0706e82 1935 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1936 struct ieee80211_mgd_work *wk;
1937 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1938 u16 fc;
1939
f0706e82
JB		 1940 rx_status = (struct ieee80211_rx_status *) skb->cb;
1941 mgmt = (struct ieee80211_mgmt *) skb->data;
1942 fc = le16_to_cpu(mgmt->frame_control);
1943
77fdaa12
JB		 1944 mutex_lock(&ifmgd->mtx);
1945
1946 if (ifmgd->associated &&
1947 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1948 ETH_ALEN) == 0) {
1949 switch (fc & IEEE80211_FCTL_STYPE) {
1950 case IEEE80211_STYPE_BEACON:
1951 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1952 rx_status);
1953 break;
1954 case IEEE80211_STYPE_PROBE_RESP:
1955 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1956 skb->len, rx_status);
1957 break;
1958 case IEEE80211_STYPE_DEAUTH:
1959 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1960 mgmt, skb->len);
1961 break;
1962 case IEEE80211_STYPE_DISASSOC:
1963 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1964 break;
1965 case IEEE80211_STYPE_ACTION:
d7907448
FF		 1966 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1967 break;
1968
77fdaa12
JB		 1969 ieee80211_sta_process_chanswitch(sdata,
1970 &mgmt->u.action.u.chan_switch.sw_elem,
1971 ifmgd->associated);
1972 break;
1973 }
1974 mutex_unlock(&ifmgd->mtx);
1975
1976 switch (rma) {
1977 case RX_MGMT_NONE:
1978 /* no action */
1979 break;
1980 case RX_MGMT_CFG80211_DEAUTH:
ce470613 1981 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1982 break;
1983 case RX_MGMT_CFG80211_DISASSOC:
ce470613 1984 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 1985 break;
1986 default:
1987 WARN(1, "unexpected: %d", rma);
1988 }
1989 goto out;
1990 }
1991
1992 list_for_each_entry(wk, &ifmgd->work_list, list) {
1993 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1994 continue;
1995
1996 switch (fc & IEEE80211_FCTL_STYPE) {
1997 case IEEE80211_STYPE_PROBE_RESP:
1998 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1999 rx_status);
2000 break;
2001 case IEEE80211_STYPE_AUTH:
2002 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
2003 break;
2004 case IEEE80211_STYPE_ASSOC_RESP:
2005 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2006 skb->len, false);
2007 break;
2008 case IEEE80211_STYPE_REASSOC_RESP:
2009 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2010 skb->len, true);
2011 break;
2012 case IEEE80211_STYPE_DEAUTH:
2013 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2014 skb->len);
2015 break;
2016 }
2017 /*
2018 * We've processed this frame for that work, so it can't
2019 * belong to another work struct.
2020 * NB: this is also required for correctness because the
2021 * called functions can free 'wk', and for 'rma'!
2022 */
46900298 2023 break;
77fdaa12
JB		 2024 }
2025
2026 mutex_unlock(&ifmgd->mtx);
2027
2028 switch (rma) {
2029 case RX_MGMT_NONE:
2030 /* no action */
46900298 2031 break;
77fdaa12 2032 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2033 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2034 break;
77fdaa12 2035 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2036 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2037 break;
8d8b261a 2038 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2039 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2040 break;
77fdaa12
JB		 2041 default:
2042 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2043 }
2044
77fdaa12 2045 out:
f0706e82
JB		 2046 kfree_skb(skb);
2047}
2048
9c6bd790 2049static void ieee80211_sta_timer(unsigned long data)
f0706e82 2050{
60f8b39c
JB		 2051 struct ieee80211_sub_if_data *sdata =
2052 (struct ieee80211_sub_if_data *) data;
46900298 2053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2054 struct ieee80211_local *local = sdata->local;
f0706e82 2055
5bb644a0
JB		 2056 if (local->quiescing) {
2057 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2058 return;
2059 }
2060
42935eca 2061 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2062}
2063
9c6bd790
JB		 2064static void ieee80211_sta_work(struct work_struct *work)
2065{
2066 struct ieee80211_sub_if_data *sdata =
46900298 2067 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2068 struct ieee80211_local *local = sdata->local;
46900298 2069 struct ieee80211_if_managed *ifmgd;
9c6bd790 2070 struct sk_buff *skb;
77fdaa12
JB		 2071 struct ieee80211_mgd_work *wk, *tmp;
2072 LIST_HEAD(free_work);
2073 enum rx_mgmt_action rma;
2074 bool anybusy = false;
9c6bd790
JB		 2075
2076 if (!netif_running(sdata->dev))
2077 return;
2078
fbe9c429 2079 if (local->scanning)
9c6bd790
JB		 2080 return;
2081
46900298 2082 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2083 return;
5bb644a0
JB		 2084
2085 /*
42935eca
LR		 2086 * ieee80211_queue_work() should have picked up most cases,
2087 * here we'll pick the the rest.
5bb644a0 2088 */
42935eca
LR		 2089 if (WARN(local->suspended, "STA MLME work scheduled while "
2090 "going to suspend\n"))
5bb644a0
JB		 2091 return;
2092
46900298 2093 ifmgd = &sdata->u.mgd;
f0706e82 2094
77fdaa12 2095 /* first process frames to avoid timing out while a frame is pending */
46900298 2096 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2097 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2098
77fdaa12
JB		 2099 /* then process the rest of the work */
2100 mutex_lock(&ifmgd->mtx);
2101
b291ba11
JB		 2102 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2103 IEEE80211_STA_CONNECTION_POLL) &&
2104 ifmgd->associated) {
a43abf29
ML		 2105 u8 bssid[ETH_ALEN];
2106
2107 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2108 if (time_is_after_jiffies(ifmgd->probe_timeout))
2109 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2110
2111 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2112#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2113 printk(KERN_DEBUG "No probe response from AP %pM"
2114 " after %dms, try %d\n", bssid,
2115 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2116 ifmgd->probe_send_count);
2117#endif
2118 ieee80211_mgd_probe_ap_send(sdata);
2119 } else {
b291ba11
JB		 2120 /*
2121 * We actually lost the connection ... or did we?
2122 * Let's make sure!
2123 */
2124 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2125 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2126 printk(KERN_DEBUG "No probe response from AP %pM"
2127 " after %dms, disconnecting.\n",
2128 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e21546a2 2129 ieee80211_set_disassoc(sdata, true);
bc83b681 2130 ieee80211_recalc_idle(local);
b291ba11
JB		 2131 mutex_unlock(&ifmgd->mtx);
2132 /*
2133 * must be outside lock due to cfg80211,
2134 * but that's not a problem.
2135 */
2136 ieee80211_send_deauth_disassoc(sdata, bssid,
2137 IEEE80211_STYPE_DEAUTH,
2138 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2139 NULL);
2140 mutex_lock(&ifmgd->mtx);
2141 }
2142 }
2143
f0706e82 2144
77fdaa12
JB		 2145 ieee80211_recalc_idle(local);
2146
77fdaa12 2147 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2148 if (time_is_after_jiffies(wk->timeout)) {
2149 /*
2150 * This work item isn't supposed to be worked on
2151 * right now, but take care to adjust the timer
2152 * properly.
2153 */
2154 run_again(ifmgd, wk->timeout);
77fdaa12 2155 continue;
ca386f31 2156 }
5cff20e6 2157
77fdaa12
JB		 2158 switch (wk->state) {
2159 default:
2160 WARN_ON(1);
2161 /* fall through */
2162 case IEEE80211_MGD_STATE_IDLE:
2163 /* nothing */
2164 rma = RX_MGMT_NONE;
2165 break;
2166 case IEEE80211_MGD_STATE_PROBE:
2167 rma = ieee80211_direct_probe(sdata, wk);
2168 break;
2169 case IEEE80211_MGD_STATE_AUTH:
2170 rma = ieee80211_authenticate(sdata, wk);
2171 break;
2172 case IEEE80211_MGD_STATE_ASSOC:
2173 rma = ieee80211_associate(sdata, wk);
2174 break;
2175 }
2176
2177 switch (rma) {
2178 case RX_MGMT_NONE:
2179 /* no action required */
2180 break;
2181 case RX_MGMT_CFG80211_AUTH_TO:
2182 case RX_MGMT_CFG80211_ASSOC_TO:
2183 list_del(&wk->list);
2184 list_add(&wk->list, &free_work);
2185 wk->tries = rma; /* small abuse but only local */
2186 break;
2187 default:
2188 WARN(1, "unexpected: %d", rma);
2189 }
2190 }
2191
5bf6fcc2
JM		 2192 list_for_each_entry(wk, &ifmgd->work_list, list) {
2193 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2194 anybusy = true;
2195 break;
2196 }
2197 }
2198 if (!anybusy &&
2199 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2200 ieee80211_queue_delayed_work(&local->hw,
2201 &local->scan_work,
2202 round_jiffies_relative(0));
2203
77fdaa12
JB		 2204 mutex_unlock(&ifmgd->mtx);
2205
2206 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2207 switch (wk->tries) {
2208 case RX_MGMT_CFG80211_AUTH_TO:
2209 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2210 wk->bss->cbss.bssid);
77fdaa12
JB		 2211 break;
2212 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2213 cfg80211_send_assoc_timeout(sdata->dev,
2214 wk->bss->cbss.bssid);
77fdaa12
JB		 2215 break;
2216 default:
2217 WARN(1, "unexpected: %d", wk->tries);
2218 }
2219
2220 list_del(&wk->list);
2221 kfree(wk);
9c6bd790 2222 }
77fdaa12
JB		 2223
2224 ieee80211_recalc_idle(local);
f0706e82
JB		 2225}
2226
b291ba11
JB		 2227static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2228{
2229 struct ieee80211_sub_if_data *sdata =
2230 (struct ieee80211_sub_if_data *) data;
2231 struct ieee80211_local *local = sdata->local;
2232
2233 if (local->quiescing)
2234 return;
2235
42935eca 2236 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2237}
2238
2239static void ieee80211_sta_conn_mon_timer(unsigned long data)
2240{
2241 struct ieee80211_sub_if_data *sdata =
2242 (struct ieee80211_sub_if_data *) data;
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2244 struct ieee80211_local *local = sdata->local;
2245
2246 if (local->quiescing)
2247 return;
2248
42935eca 2249 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2250}
2251
2252static void ieee80211_sta_monitor_work(struct work_struct *work)
2253{
2254 struct ieee80211_sub_if_data *sdata =
2255 container_of(work, struct ieee80211_sub_if_data,
2256 u.mgd.monitor_work);
2257
2258 ieee80211_mgd_probe_ap(sdata, false);
2259}
2260
9c6bd790
JB		 2261static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2262{
ad935687 2263 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2264 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2265 IEEE80211_STA_CONNECTION_POLL);
ad935687 2266
b291ba11 2267 /* let's probe the connection once */
42935eca 2268 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2269 &sdata->u.mgd.monitor_work);
2270 /* and do all the other regular work too */
42935eca 2271 ieee80211_queue_work(&sdata->local->hw,
46900298 2272 &sdata->u.mgd.work);
ad935687 2273 }
9c6bd790 2274}
f0706e82 2275
5bb644a0
JB		 2276#ifdef CONFIG_PM
2277void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2278{
2279 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2280
2281 /*
2282 * we need to use atomic bitops for the running bits
2283 * only because both timers might fire at the same
2284 * time -- the code here is properly synchronised.
2285 */
2286
2287 cancel_work_sync(&ifmgd->work);
2288 cancel_work_sync(&ifmgd->beacon_loss_work);
2289 if (del_timer_sync(&ifmgd->timer))
2290 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2291
2292 cancel_work_sync(&ifmgd->chswitch_work);
2293 if (del_timer_sync(&ifmgd->chswitch_timer))
2294 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2295
2296 cancel_work_sync(&ifmgd->monitor_work);
2297 /* these will just be re-established on connection */
2298 del_timer_sync(&ifmgd->conn_mon_timer);
2299 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2300}
2301
2302void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2303{
2304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2305
2306 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2307 add_timer(&ifmgd->timer);
2308 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2309 add_timer(&ifmgd->chswitch_timer);
2310}
2311#endif
2312
9c6bd790
JB		 2313/* interface setup */
2314void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2315{
46900298 2316 struct ieee80211_if_managed *ifmgd;
988c0f72 2317
46900298
JB		 2318 ifmgd = &sdata->u.mgd;
2319 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2320 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2321 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2322 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2323 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2324 (unsigned long) sdata);
b291ba11
JB		 2325 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2326 (unsigned long) sdata);
2327 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2328 (unsigned long) sdata);
46900298 2329 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2330 (unsigned long) sdata);
46900298 2331 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2332
77fdaa12
JB		 2333 INIT_LIST_HEAD(&ifmgd->work_list);
2334
46900298 2335 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2336 ifmgd->flags = 0;
176be728 2337 if (sdata->local->hw.queues >= 4)
46900298 2338 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2339
77fdaa12 2340 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2341}
2342
77fdaa12
JB		 2343/* scan finished notification */
2344void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2345{
77fdaa12 2346 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2347
77fdaa12
JB		 2348 /* Restart STA timers */
2349 rcu_read_lock();
2350 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2351 ieee80211_restart_sta_timer(sdata);
2352 rcu_read_unlock();
2353}
60f8b39c 2354
77fdaa12
JB		 2355int ieee80211_max_network_latency(struct notifier_block *nb,
2356 unsigned long data, void *dummy)
2357{
2358 s32 latency_usec = (s32) data;
2359 struct ieee80211_local *local =
2360 container_of(nb, struct ieee80211_local,
2361 network_latency_notifier);
1fa6f4af 2362
77fdaa12
JB		 2363 mutex_lock(&local->iflist_mtx);
2364 ieee80211_recalc_ps(local, latency_usec);
2365 mutex_unlock(&local->iflist_mtx);
dfe67012 2366
77fdaa12 2367 return 0;
9c6bd790
JB		 2368}
2369
77fdaa12
JB		 2370/* config hooks */
2371int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2372 struct cfg80211_auth_request *req)
9c6bd790 2373{
46900298 2374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2375 const u8 *ssid;
2376 struct ieee80211_mgd_work *wk;
2377 u16 auth_alg;
9c6bd790 2378
77fdaa12
JB		 2379 switch (req->auth_type) {
2380 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2381 auth_alg = WLAN_AUTH_OPEN;
2382 break;
2383 case NL80211_AUTHTYPE_SHARED_KEY:
2384 auth_alg = WLAN_AUTH_SHARED_KEY;
2385 break;
2386 case NL80211_AUTHTYPE_FT:
2387 auth_alg = WLAN_AUTH_FT;
2388 break;
2389 case NL80211_AUTHTYPE_NETWORK_EAP:
2390 auth_alg = WLAN_AUTH_LEAP;
2391 break;
2392 default:
2393 return -EOPNOTSUPP;
60f8b39c 2394 }
77fdaa12
JB		 2395
2396 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2397 if (!wk)
9c6bd790 2398 return -ENOMEM;
77fdaa12
JB		 2399
2400 wk->bss = (void *)req->bss;
2401
2402 if (req->ie && req->ie_len) {
2403 memcpy(wk->ie, req->ie, req->ie_len);
2404 wk->ie_len = req->ie_len;
9c6bd790 2405 }
77fdaa12 2406
fffd0934
JB		 2407 if (req->key && req->key_len) {
2408 wk->key_len = req->key_len;
2409 wk->key_idx = req->key_idx;
2410 memcpy(wk->key, req->key, req->key_len);
2411 }
2412
77fdaa12
JB		 2413 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2414 memcpy(wk->ssid, ssid + 2, ssid[1]);
2415 wk->ssid_len = ssid[1];
2416
2417 wk->state = IEEE80211_MGD_STATE_PROBE;
2418 wk->auth_alg = auth_alg;
48531847 2419 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2420
2421 /*
2422 * XXX: if still associated need to tell AP that we're going
2423 * to sleep and then change channel etc.
2424 */
2425 sdata->local->oper_channel = req->bss->channel;
2426 ieee80211_hw_config(sdata->local, 0);
2427
2428 mutex_lock(&ifmgd->mtx);
2429 list_add(&wk->list, &sdata->u.mgd.work_list);
2430 mutex_unlock(&ifmgd->mtx);
2431
42935eca 2432 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2433 return 0;
60f8b39c
JB		 2434}
2435
77fdaa12
JB		 2436int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2437 struct cfg80211_assoc_request *req)
f0706e82 2438{
77fdaa12
JB		 2439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2440 struct ieee80211_mgd_work *wk, *found = NULL;
2441 int i, err;
f0706e82 2442
77fdaa12
JB		 2443 mutex_lock(&ifmgd->mtx);
2444
2445 list_for_each_entry(wk, &ifmgd->work_list, list) {
2446 if (&wk->bss->cbss == req->bss &&
2447 wk->state == IEEE80211_MGD_STATE_IDLE) {
2448 found = wk;
2449 break;
2450 }
2451 }
2452
2453 if (!found) {
2454 err = -ENOLINK;
2455 goto out;
2456 }
2457
2458 list_del(&found->list);
2459
2460 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2461 if (!wk) {
2462 list_add(&found->list, &ifmgd->work_list);
2463 err = -ENOMEM;
2464 goto out;
2465 }
2466
2467 list_add(&wk->list, &ifmgd->work_list);
2468
2469 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2470
2471 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2472 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2473 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2474 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2475 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2476
2477 sdata->local->oper_channel = req->bss->channel;
2478 ieee80211_hw_config(sdata->local, 0);
2479
2480 if (req->ie && req->ie_len) {
2481 memcpy(wk->ie, req->ie, req->ie_len);
2482 wk->ie_len = req->ie_len;
2483 } else
2484 wk->ie_len = 0;
2485
2486 if (req->prev_bssid)
2487 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2488
2489 wk->state = IEEE80211_MGD_STATE_ASSOC;
2490 wk->tries = 0;
48531847 2491 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2492
2493 if (req->use_mfp) {
2494 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2495 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2496 } else {
2497 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2498 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2499 }
2500
2501 if (req->crypto.control_port)
2502 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2503 else
2504 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2505
42935eca 2506 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2507
2508 err = 0;
2509
2510 out:
2511 mutex_unlock(&ifmgd->mtx);
2512 return err;
f0706e82
JB		 2513}
2514
77fdaa12 2515int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2516 struct cfg80211_deauth_request *req,
2517 void *cookie)
f0706e82 2518{
46900298 2519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2520 struct ieee80211_mgd_work *wk;
2521 const u8 *bssid = NULL;
a58ce43f 2522 bool not_auth_yet = false;
f0706e82 2523
77fdaa12
JB		 2524 mutex_lock(&ifmgd->mtx);
2525
2526 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2527 bssid = req->bss->bssid;
e21546a2 2528 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 2529 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2530 if (&wk->bss->cbss == req->bss) {
2531 bssid = req->bss->bssid;
a58ce43f
JB		 2532 if (wk->state == IEEE80211_MGD_STATE_PROBE)
2533 not_auth_yet = true;
77fdaa12
JB		 2534 list_del(&wk->list);
2535 kfree(wk);
2536 break;
2537 }
2538 }
f0706e82 2539
a58ce43f
JB		 2540 /*
2541 * If somebody requests authentication and we haven't
2542 * sent out an auth frame yet there's no need to send
2543 * out a deauth frame either. If the state was PROBE,
2544 * then this is the case. If it's AUTH we have sent a
2545 * frame, and if it's IDLE we have completed the auth
2546 * process already.
2547 */
2548 if (not_auth_yet) {
2549 mutex_unlock(&ifmgd->mtx);
2550 __cfg80211_auth_canceled(sdata->dev, bssid);
2551 return 0;
2552 }
2553
8d8b261a
JB		 2554 /*
2555 * cfg80211 should catch this ... but it's racy since
2556 * we can receive a deauth frame, process it, hand it
2557 * to cfg80211 while that's in a locked section already
2558 * trying to tell us that the user wants to disconnect.
2559 */
2560 if (!bssid) {
77fdaa12 2561 mutex_unlock(&ifmgd->mtx);
46900298 2562 return -ENOLINK;
77fdaa12
JB		 2563 }
2564
2565 mutex_unlock(&ifmgd->mtx);
2566
0ff71613
JB		 2567 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
2568 sdata->dev->name, bssid, req->reason_code);
2569
77fdaa12 2570 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2571 IEEE80211_STYPE_DEAUTH, req->reason_code,
2572 cookie);
f0706e82 2573
bc83b681
JB		 2574 ieee80211_recalc_idle(sdata->local);
2575
f0706e82
JB		 2576 return 0;
2577}
84363e6e 2578
77fdaa12 2579int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2580 struct cfg80211_disassoc_request *req,
2581 void *cookie)
9c6bd790 2582{
77fdaa12 2583 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2584
77fdaa12 2585 mutex_lock(&ifmgd->mtx);
10f644a4 2586
8d8b261a
JB		 2587 /*
2588 * cfg80211 should catch this ... but it's racy since
2589 * we can receive a disassoc frame, process it, hand it
2590 * to cfg80211 while that's in a locked section already
2591 * trying to tell us that the user wants to disconnect.
2592 */
2593 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2594 mutex_unlock(&ifmgd->mtx);
2595 return -ENOLINK;
2596 }
2597
0ff71613
JB		 2598 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
2599 sdata->dev->name, req->bss->bssid, req->reason_code);
2600
e21546a2 2601 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2602
2603 mutex_unlock(&ifmgd->mtx);
10f644a4 2604
77fdaa12 2605 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2606 IEEE80211_STYPE_DISASSOC, req->reason_code,
2607 cookie);
bc83b681
JB		 2608
2609 ieee80211_recalc_idle(sdata->local);
2610
10f644a4
JB		 2611 return 0;
2612}
Linux kernel - Deliverables
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