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mac80211: let cfg80211 manage auth state
[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
5d1ec85f
JB		 78 /* caller must tell cfg80211 about internal error */
79 RX_MGMT_CFG80211_ASSOC_ERROR,
80
77fdaa12
JB		 81 /* caller must call cfg80211_auth_timeout() & free work */
82 RX_MGMT_CFG80211_AUTH_TO,
83
84 /* caller must call cfg80211_assoc_timeout() & free work */
85 RX_MGMT_CFG80211_ASSOC_TO,
86};
87
5484e237 88/* utils */
77fdaa12
JB		 89static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
90{
91 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
92}
93
ca386f31
JB		 94/*
95 * We can have multiple work items (and connection probing)
96 * scheduling this timer, but we need to take care to only
97 * reschedule it when it should fire _earlier_ than it was
98 * asked for before, or if it's not pending right now. This
99 * function ensures that. Note that it then is required to
100 * run this function for all timeouts after the first one
101 * has happened -- the work that runs from this timer will
102 * do that.
103 */
104static void run_again(struct ieee80211_if_managed *ifmgd,
105 unsigned long timeout)
106{
107 ASSERT_MGD_MTX(ifmgd);
108
109 if (!timer_pending(&ifmgd->timer) ||
110 time_before(timeout, ifmgd->timer.expires))
111 mod_timer(&ifmgd->timer, timeout);
112}
113
b291ba11
JB		 114static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
115{
116 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
117 return;
118
119 mod_timer(&sdata->u.mgd.bcn_mon_timer,
120 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
121}
122
5484e237 123static int ecw2cw(int ecw)
60f8b39c 124{
5484e237 125 return (1 << ecw) - 1;
60f8b39c
JB		 126}
127
c2b13452 128static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 129 struct ieee80211_supported_band *sband,
881d948c 130 u32 *rates)
9ac19a90
JB		 131{
132 int i, j, count;
133 *rates = 0;
134 count = 0;
135 for (i = 0; i < bss->supp_rates_len; i++) {
136 int rate = (bss->supp_rates[i] & 0x7F) * 5;
137
138 for (j = 0; j < sband->n_bitrates; j++)
139 if (sband->bitrates[j].bitrate == rate) {
140 *rates |= BIT(j);
141 count++;
142 break;
143 }
144 }
145
146 return count;
147}
148
d5522e03
JB		 149/*
150 * ieee80211_enable_ht should be called only after the operating band
151 * has been determined as ht configuration depends on the hw's
152 * HT abilities for a specific band.
153 */
154static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
155 struct ieee80211_ht_info *hti,
77fdaa12 156 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 157{
158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_supported_band *sband;
d5522e03
JB		 160 struct sta_info *sta;
161 u32 changed = 0;
9ed6bcce 162 u16 ht_opmode;
d5522e03
JB		 163 bool enable_ht = true, ht_changed;
164 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
165
166 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
167
d5522e03
JB		 168 /* HT is not supported */
169 if (!sband->ht_cap.ht_supported)
170 enable_ht = false;
171
172 /* check that channel matches the right operating channel */
173 if (local->hw.conf.channel->center_freq !=
174 ieee80211_channel_to_frequency(hti->control_chan))
175 enable_ht = false;
176
177 if (enable_ht) {
178 channel_type = NL80211_CHAN_HT20;
179
180 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
181 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
182 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
183 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
184 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 185 if (!(local->hw.conf.channel->flags &
186 IEEE80211_CHAN_NO_HT40PLUS))
187 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 188 break;
189 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 190 if (!(local->hw.conf.channel->flags &
191 IEEE80211_CHAN_NO_HT40MINUS))
192 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 193 break;
194 }
195 }
196 }
197
198 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
199 channel_type != local->hw.conf.channel_type;
200
201 local->oper_channel_type = channel_type;
202
203 if (ht_changed) {
204 /* channel_type change automatically detected */
205 ieee80211_hw_config(local, 0);
206
207 rcu_read_lock();
abe60632 208 sta = sta_info_get(sdata, bssid);
d5522e03
JB		 209 if (sta)
210 rate_control_rate_update(local, sband, sta,
211 IEEE80211_RC_HT_CHANGED);
d5522e03 212 rcu_read_unlock();
d5522e03
JB		 213 }
214
215 /* disable HT */
216 if (!enable_ht)
217 return 0;
218
9ed6bcce 219 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 220
221 /* if bss configuration changed store the new one */
413ad50a
JB		 222 if (!sdata->ht_opmode_valid ||
223 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 224 changed |= BSS_CHANGED_HT;
9ed6bcce 225 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 226 sdata->ht_opmode_valid = true;
d5522e03
JB		 227 }
228
229 return changed;
230}
231
9c6bd790
JB		 232/* frame sending functions */
233
77fdaa12
JB		 234static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
235 struct ieee80211_mgd_work *wk)
9ac19a90 236{
46900298 237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 238 struct ieee80211_local *local = sdata->local;
239 struct sk_buff *skb;
240 struct ieee80211_mgmt *mgmt;
517357c6
JB		 241 u8 *pos;
242 const u8 *ies, *ht_ie;
9ac19a90
JB		 243 int i, len, count, rates_len, supp_rates_len;
244 u16 capab;
9ac19a90
JB		 245 int wmm = 0;
246 struct ieee80211_supported_band *sband;
881d948c 247 u32 rates = 0;
9ac19a90
JB		 248
249 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 250 sizeof(*mgmt) + 200 + wk->ie_len +
251 wk->ssid_len);
9ac19a90
JB		 252 if (!skb) {
253 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
47846c9b 254 "frame\n", sdata->name);
9ac19a90
JB		 255 return;
256 }
257 skb_reserve(skb, local->hw.extra_tx_headroom);
258
259 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
260
46900298 261 capab = ifmgd->capab;
9ac19a90
JB		 262
263 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
264 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
265 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
266 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
267 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
268 }
269
77fdaa12
JB		 270 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
271 capab |= WLAN_CAPABILITY_PRIVACY;
272 if (wk->bss->wmm_used)
273 wmm = 1;
9ac19a90 274
77fdaa12
JB		 275 /* get all rates supported by the device and the AP as
276 * some APs don't like getting a superset of their rates
277 * in the association request (e.g. D-Link DAP 1353 in
278 * b-only mode) */
279 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 280
77fdaa12
JB		 281 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
282 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
283 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 284
285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
286 memset(mgmt, 0, 24);
77fdaa12 287 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
47846c9b 288 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 289 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 290
77fdaa12 291 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 292 skb_put(skb, 10);
293 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
294 IEEE80211_STYPE_REASSOC_REQ);
295 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
296 mgmt->u.reassoc_req.listen_interval =
297 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 298 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 299 ETH_ALEN);
300 } else {
301 skb_put(skb, 4);
302 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
303 IEEE80211_STYPE_ASSOC_REQ);
304 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 305 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 306 cpu_to_le16(local->hw.conf.listen_interval);
307 }
308
309 /* SSID */
77fdaa12 310 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 311 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 312 *pos++ = wk->ssid_len;
313 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 314
315 /* add all rates which were marked to be used above */
316 supp_rates_len = rates_len;
317 if (supp_rates_len > 8)
318 supp_rates_len = 8;
319
320 len = sband->n_bitrates;
321 pos = skb_put(skb, supp_rates_len + 2);
322 *pos++ = WLAN_EID_SUPP_RATES;
323 *pos++ = supp_rates_len;
324
325 count = 0;
326 for (i = 0; i < sband->n_bitrates; i++) {
327 if (BIT(i) & rates) {
328 int rate = sband->bitrates[i].bitrate;
329 *pos++ = (u8) (rate / 5);
330 if (++count == 8)
331 break;
332 }
333 }
334
335 if (rates_len > count) {
336 pos = skb_put(skb, rates_len - count + 2);
337 *pos++ = WLAN_EID_EXT_SUPP_RATES;
338 *pos++ = rates_len - count;
339
340 for (i++; i < sband->n_bitrates; i++) {
341 if (BIT(i) & rates) {
342 int rate = sband->bitrates[i].bitrate;
343 *pos++ = (u8) (rate / 5);
344 }
345 }
346 }
347
348 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
349 /* 1. power capabilities */
350 pos = skb_put(skb, 4);
351 *pos++ = WLAN_EID_PWR_CAPABILITY;
352 *pos++ = 2;
353 *pos++ = 0; /* min tx power */
354 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
355
356 /* 2. supported channels */
357 /* TODO: get this in reg domain format */
358 pos = skb_put(skb, 2 * sband->n_channels + 2);
359 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
360 *pos++ = 2 * sband->n_channels;
361 for (i = 0; i < sband->n_channels; i++) {
362 *pos++ = ieee80211_frequency_to_channel(
363 sband->channels[i].center_freq);
364 *pos++ = 1; /* one channel in the subband*/
365 }
366 }
367
77fdaa12
JB		 368 if (wk->ie_len && wk->ie) {
369 pos = skb_put(skb, wk->ie_len);
370 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 371 }
372
46900298 373 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 374 pos = skb_put(skb, 9);
375 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
376 *pos++ = 7; /* len */
377 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
378 *pos++ = 0x50;
379 *pos++ = 0xf2;
380 *pos++ = 2; /* WME */
381 *pos++ = 0; /* WME info */
382 *pos++ = 1; /* WME ver */
383 *pos++ = 0;
384 }
385
386 /* wmm support is a must to HT */
eb46936b
VT		 387 /*
388 * IEEE802.11n does not allow TKIP/WEP as pairwise
389 * ciphers in HT mode. We still associate in non-ht
390 * mode (11a/b/g) if any one of these ciphers is
391 * configured as pairwise.
392 */
46900298 393 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 394 sband->ht_cap.ht_supported &&
77fdaa12 395 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 396 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 397 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 398 struct ieee80211_ht_info *ht_info =
399 (struct ieee80211_ht_info *)(ht_ie + 2);
400 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 401 __le16 tmp;
402 u32 flags = local->hw.conf.channel->flags;
403
0f78231b
JB		 404 /* determine capability flags */
405
f38fd12f
JB		 406 if (ieee80211_disable_40mhz_24ghz &&
407 sband->band == IEEE80211_BAND_2GHZ) {
408 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
409 cap &= ~IEEE80211_HT_CAP_SGI_40;
410 }
411
d9fe60de
JB		 412 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
413 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 414 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 415 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 416 cap &= ~IEEE80211_HT_CAP_SGI_40;
417 }
418 break;
d9fe60de 419 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 420 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 421 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 422 cap &= ~IEEE80211_HT_CAP_SGI_40;
423 }
424 break;
425 }
426
0f78231b
JB		 427 /* set SM PS mode properly */
428 cap &= ~IEEE80211_HT_CAP_SM_PS;
429 /* new association always uses requested smps mode */
430 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
431 if (ifmgd->powersave)
432 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
433 else
434 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
435 } else
436 ifmgd->ap_smps = ifmgd->req_smps;
437
438 switch (ifmgd->ap_smps) {
439 case IEEE80211_SMPS_AUTOMATIC:
440 case IEEE80211_SMPS_NUM_MODES:
441 WARN_ON(1);
442 case IEEE80211_SMPS_OFF:
443 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
444 IEEE80211_HT_CAP_SM_PS_SHIFT;
445 break;
446 case IEEE80211_SMPS_STATIC:
447 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
448 IEEE80211_HT_CAP_SM_PS_SHIFT;
449 break;
450 case IEEE80211_SMPS_DYNAMIC:
451 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
452 IEEE80211_HT_CAP_SM_PS_SHIFT;
453 break;
454 }
455
456 /* reserve and fill IE */
457
458 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
9ac19a90
JB		 459 *pos++ = WLAN_EID_HT_CAPABILITY;
460 *pos++ = sizeof(struct ieee80211_ht_cap);
461 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
0f78231b
JB		 462
463 /* capability flags */
464 tmp = cpu_to_le16(cap);
9ac19a90
JB		 465 memcpy(pos, &tmp, sizeof(u16));
466 pos += sizeof(u16);
0f78231b
JB		 467
468 /* AMPDU parameters */
d9fe60de 469 *pos++ = sband->ht_cap.ampdu_factor |
0f78231b
JB		 470 (sband->ht_cap.ampdu_density <<
471 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
472
473 /* MCS set */
d9fe60de 474 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
0f78231b
JB		 475 pos += sizeof(sband->ht_cap.mcs);
476
477 /* extended capabilities */
478 pos += sizeof(__le16);
479
480 /* BF capabilities */
481 pos += sizeof(__le32);
482
483 /* antenna selection */
484 pos += sizeof(u8);
9ac19a90
JB		 485 }
486
62ae67be
JB		 487 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
488 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 489}
490
491
ef422bc0 492static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 493 const u8 *bssid, u16 stype, u16 reason,
494 void *cookie)
9ac19a90
JB		 495{
496 struct ieee80211_local *local = sdata->local;
46900298 497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 498 struct sk_buff *skb;
499 struct ieee80211_mgmt *mgmt;
9aed3cc1 500
65fc73ac 501 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 502 if (!skb) {
ef422bc0 503 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 504 "deauth/disassoc frame\n", sdata->name);
9ac19a90
JB		 505 return;
506 }
507 skb_reserve(skb, local->hw.extra_tx_headroom);
508
509 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
510 memset(mgmt, 0, 24);
77fdaa12 511 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 512 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 513 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 514 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 515 skb_put(skb, 2);
ef422bc0 516 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 517 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
518
53b46b84 519 if (stype == IEEE80211_STYPE_DEAUTH)
ce470613
HS		 520 if (cookie)
521 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
522 else
523 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
53b46b84 524 else
ce470613
HS		 525 if (cookie)
526 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
527 else
528 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
62ae67be
JB		 529 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
530 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
531 ieee80211_tx_skb(sdata, skb);
9ac19a90
JB		 532}
533
572e0012
KV		 534void ieee80211_send_pspoll(struct ieee80211_local *local,
535 struct ieee80211_sub_if_data *sdata)
536{
46900298 537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 538 struct ieee80211_pspoll *pspoll;
539 struct sk_buff *skb;
540 u16 fc;
541
542 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
543 if (!skb) {
544 printk(KERN_DEBUG "%s: failed to allocate buffer for "
47846c9b 545 "pspoll frame\n", sdata->name);
572e0012
KV		 546 return;
547 }
548 skb_reserve(skb, local->hw.extra_tx_headroom);
549
550 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
551 memset(pspoll, 0, sizeof(*pspoll));
552 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
553 pspoll->frame_control = cpu_to_le16(fc);
46900298 554 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 555
556 /* aid in PS-Poll has its two MSBs each set to 1 */
557 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
558
46900298 559 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
47846c9b 560 memcpy(pspoll->ta, sdata->vif.addr, ETH_ALEN);
572e0012 561
62ae67be
JB		 562 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
563 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 564}
565
965bedad
JB		 566void ieee80211_send_nullfunc(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata,
568 int powersave)
569{
570 struct sk_buff *skb;
571 struct ieee80211_hdr *nullfunc;
572 __le16 fc;
573
574 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
575 return;
576
577 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
578 if (!skb) {
579 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
47846c9b 580 "frame\n", sdata->name);
965bedad
JB		 581 return;
582 }
583 skb_reserve(skb, local->hw.extra_tx_headroom);
584
585 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
586 memset(nullfunc, 0, 24);
587 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
588 IEEE80211_FCTL_TODS);
589 if (powersave)
590 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
591 nullfunc->frame_control = fc;
592 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 593 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
965bedad
JB		 594 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
595
62ae67be
JB		 596 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
597 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 598}
599
cc32abd4
JB		 600/* spectrum management related things */
601static void ieee80211_chswitch_work(struct work_struct *work)
602{
603 struct ieee80211_sub_if_data *sdata =
604 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
606
9607e6b6 607 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 608 return;
609
77fdaa12
JB		 610 mutex_lock(&ifmgd->mtx);
611 if (!ifmgd->associated)
612 goto out;
cc32abd4
JB		 613
614 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 615 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
616
cc32abd4 617 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 618 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 619
cc32abd4
JB		 620 ieee80211_wake_queues_by_reason(&sdata->local->hw,
621 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 622 out:
623 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
624 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 625}
626
627static void ieee80211_chswitch_timer(unsigned long data)
628{
629 struct ieee80211_sub_if_data *sdata =
630 (struct ieee80211_sub_if_data *) data;
631 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
632
5bb644a0
JB		 633 if (sdata->local->quiescing) {
634 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
635 return;
636 }
637
42935eca 638 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 639}
640
641void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
642 struct ieee80211_channel_sw_ie *sw_elem,
643 struct ieee80211_bss *bss)
644{
645 struct ieee80211_channel *new_ch;
646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
647 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
648
77fdaa12
JB		 649 ASSERT_MGD_MTX(ifmgd);
650
651 if (!ifmgd->associated)
cc32abd4
JB		 652 return;
653
fbe9c429 654 if (sdata->local->scanning)
cc32abd4
JB		 655 return;
656
657 /* Disregard subsequent beacons if we are already running a timer
658 processing a CSA */
659
660 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
661 return;
662
663 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
664 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
665 return;
666
667 sdata->local->csa_channel = new_ch;
668
669 if (sw_elem->count <= 1) {
42935eca 670 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 671 } else {
672 ieee80211_stop_queues_by_reason(&sdata->local->hw,
673 IEEE80211_QUEUE_STOP_REASON_CSA);
674 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
675 mod_timer(&ifmgd->chswitch_timer,
676 jiffies +
677 msecs_to_jiffies(sw_elem->count *
678 bss->cbss.beacon_interval));
679 }
680}
681
682static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
683 u16 capab_info, u8 *pwr_constr_elem,
684 u8 pwr_constr_elem_len)
685{
686 struct ieee80211_conf *conf = &sdata->local->hw.conf;
687
688 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
689 return;
690
691 /* Power constraint IE length should be 1 octet */
692 if (pwr_constr_elem_len != 1)
693 return;
694
695 if ((*pwr_constr_elem <= conf->channel->max_power) &&
696 (*pwr_constr_elem != sdata->local->power_constr_level)) {
697 sdata->local->power_constr_level = *pwr_constr_elem;
698 ieee80211_hw_config(sdata->local, 0);
699 }
700}
701
965bedad
JB		 702/* powersave */
703static void ieee80211_enable_ps(struct ieee80211_local *local,
704 struct ieee80211_sub_if_data *sdata)
705{
706 struct ieee80211_conf *conf = &local->hw.conf;
707
d5edaedc
JB		 708 /*
709 * If we are scanning right now then the parameters will
710 * take effect when scan finishes.
711 */
fbe9c429 712 if (local->scanning)
d5edaedc
JB		 713 return;
714
965bedad
JB		 715 if (conf->dynamic_ps_timeout > 0 &&
716 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
717 mod_timer(&local->dynamic_ps_timer, jiffies +
718 msecs_to_jiffies(conf->dynamic_ps_timeout));
719 } else {
720 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
721 ieee80211_send_nullfunc(local, sdata, 1);
722 conf->flags |= IEEE80211_CONF_PS;
723 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
724 }
725}
726
727static void ieee80211_change_ps(struct ieee80211_local *local)
728{
729 struct ieee80211_conf *conf = &local->hw.conf;
730
731 if (local->ps_sdata) {
965bedad
JB		 732 ieee80211_enable_ps(local, local->ps_sdata);
733 } else if (conf->flags & IEEE80211_CONF_PS) {
734 conf->flags &= ~IEEE80211_CONF_PS;
735 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
736 del_timer_sync(&local->dynamic_ps_timer);
737 cancel_work_sync(&local->dynamic_ps_enable_work);
738 }
739}
740
741/* need to hold RTNL or interface lock */
10f644a4 742void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 743{
744 struct ieee80211_sub_if_data *sdata, *found = NULL;
745 int count = 0;
746
747 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
748 local->ps_sdata = NULL;
749 return;
750 }
751
752 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 753 if (!ieee80211_sdata_running(sdata))
965bedad
JB		 754 continue;
755 if (sdata->vif.type != NL80211_IFTYPE_STATION)
756 continue;
757 found = sdata;
758 count++;
759 }
760
43f78531 761 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 762 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 763 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
764 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 765 s32 beaconint_us;
766
767 if (latency < 0)
768 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
769
770 beaconint_us = ieee80211_tu_to_usec(
771 found->vif.bss_conf.beacon_int);
772
04fe2037 773 if (beaconint_us > latency) {
10f644a4 774 local->ps_sdata = NULL;
04fe2037
JB		 775 } else {
776 u8 dtimper = found->vif.bss_conf.dtim_period;
777 int maxslp = 1;
778
779 if (dtimper > 1)
780 maxslp = min_t(int, dtimper,
781 latency / beaconint_us);
782
9ccebe61 783 local->hw.conf.max_sleep_period = maxslp;
10f644a4 784 local->ps_sdata = found;
04fe2037 785 }
10f644a4 786 } else {
965bedad 787 local->ps_sdata = NULL;
10f644a4 788 }
965bedad
JB		 789
790 ieee80211_change_ps(local);
791}
792
793void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
794{
795 struct ieee80211_local *local =
796 container_of(work, struct ieee80211_local,
797 dynamic_ps_disable_work);
798
799 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
800 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
801 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
802 }
803
804 ieee80211_wake_queues_by_reason(&local->hw,
805 IEEE80211_QUEUE_STOP_REASON_PS);
806}
807
808void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
809{
810 struct ieee80211_local *local =
811 container_of(work, struct ieee80211_local,
812 dynamic_ps_enable_work);
813 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
814
815 /* can only happen when PS was just disabled anyway */
816 if (!sdata)
817 return;
818
819 if (local->hw.conf.flags & IEEE80211_CONF_PS)
820 return;
821
822 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
823 ieee80211_send_nullfunc(local, sdata, 1);
824
825 local->hw.conf.flags |= IEEE80211_CONF_PS;
826 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
827}
828
829void ieee80211_dynamic_ps_timer(unsigned long data)
830{
831 struct ieee80211_local *local = (void *) data;
832
78f1a8b7 833 if (local->quiescing || local->suspended)
5bb644a0
JB		 834 return;
835
42935eca 836 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 837}
838
60f8b39c 839/* MLME */
f698d856 840static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 841 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 842 u8 *wmm_param, size_t wmm_param_len)
843{
f0706e82
JB		 844 struct ieee80211_tx_queue_params params;
845 size_t left;
846 int count;
847 u8 *pos;
848
46900298 849 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 850 return;
851
852 if (!wmm_param)
853 return;
854
f0706e82
JB		 855 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
856 return;
857 count = wmm_param[6] & 0x0f;
46900298 858 if (count == ifmgd->wmm_last_param_set)
f0706e82 859 return;
46900298 860 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 861
862 pos = wmm_param + 8;
863 left = wmm_param_len - 8;
864
865 memset(&params, 0, sizeof(params));
866
f0706e82
JB		 867 local->wmm_acm = 0;
868 for (; left >= 4; left -= 4, pos += 4) {
869 int aci = (pos[0] >> 5) & 0x03;
870 int acm = (pos[0] >> 4) & 0x01;
871 int queue;
872
873 switch (aci) {
0eeb59fe 874 case 1: /* AC_BK */
e100bb64 875 queue = 3;
988c0f72 876 if (acm)
0eeb59fe 877 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 878 break;
0eeb59fe 879 case 2: /* AC_VI */
e100bb64 880 queue = 1;
988c0f72 881 if (acm)
0eeb59fe 882 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 883 break;
0eeb59fe 884 case 3: /* AC_VO */
e100bb64 885 queue = 0;
988c0f72 886 if (acm)
0eeb59fe 887 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 888 break;
0eeb59fe 889 case 0: /* AC_BE */
f0706e82 890 default:
e100bb64 891 queue = 2;
988c0f72 892 if (acm)
0eeb59fe 893 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 894 break;
895 }
896
897 params.aifs = pos[0] & 0x0f;
898 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
899 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 900 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 901#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 902 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 903 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 904 wiphy_name(local->hw.wiphy), queue, aci, acm,
905 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 906#endif
24487981 907 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 908 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 909 "parameters for queue %d\n",
910 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 911 }
912}
913
7a5158ef
JB		 914static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
915 u16 capab, bool erp_valid, u8 erp)
5628221c 916{
bda3933a 917 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 918 u32 changed = 0;
7a5158ef
JB		 919 bool use_protection;
920 bool use_short_preamble;
921 bool use_short_slot;
922
923 if (erp_valid) {
924 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
925 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
926 } else {
927 use_protection = false;
928 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
929 }
930
931 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 932
471b3efd 933 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 934 bss_conf->use_cts_prot = use_protection;
935 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 936 }
7e9ed188 937
d43c7b37 938 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 939 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 940 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 941 }
d9430a32 942
7a5158ef 943 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 944 bss_conf->use_short_slot = use_short_slot;
945 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 946 }
947
948 return changed;
949}
950
f698d856 951static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
63f170e0 952 struct ieee80211_bss *bss,
ae5eb026 953 u32 bss_info_changed)
f0706e82 954{
471b3efd 955 struct ieee80211_local *local = sdata->local;
d6f2da5b 956
ae5eb026 957 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 958 /* set timing information */
959 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
960 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
961 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 962
77fdaa12
JB		 963 bss_info_changed |= BSS_CHANGED_BEACON_INT;
964 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
965 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 966
77fdaa12
JB		 967 sdata->u.mgd.associated = bss;
968 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 969
b291ba11
JB		 970 /* just to be sure */
971 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
972 IEEE80211_STA_BEACON_POLL);
973
0183826b
JB		 974 /*
975 * Always handle WMM once after association regardless
976 * of the first value the AP uses. Setting -1 here has
977 * that effect because the AP values is an unsigned
978 * 4-bit value.
979 */
980 sdata->u.mgd.wmm_last_param_set = -1;
981
9ac19a90 982 ieee80211_led_assoc(local, 1);
9306102e 983
bda3933a 984 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 985 /*
986 * For now just always ask the driver to update the basic rateset
987 * when we have associated, we aren't checking whether it actually
988 * changed or not.
989 */
ae5eb026 990 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 991
992 /* And the BSSID changed - we're associated now */
993 bss_info_changed |= BSS_CHANGED_BSSID;
994
ae5eb026 995 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 996
056508dc
JB		 997 mutex_lock(&local->iflist_mtx);
998 ieee80211_recalc_ps(local, -1);
0f78231b 999 ieee80211_recalc_smps(local, sdata);
056508dc 1000 mutex_unlock(&local->iflist_mtx);
e0cb686f 1001
53623f1a 1002 netif_start_queue(sdata->dev);
9ac19a90 1003 netif_carrier_on(sdata->dev);
f0706e82
JB		 1004}
1005
77fdaa12
JB		 1006static enum rx_mgmt_action __must_check
1007ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
1008 struct ieee80211_mgd_work *wk)
f0706e82 1009{
46900298 1010 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1011 struct ieee80211_local *local = sdata->local;
46900298 1012
77fdaa12
JB		 1013 wk->tries++;
1014 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1015 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
47846c9b 1016 sdata->name, wk->bss->cbss.bssid);
7a947080
VT		 1017
1018 /*
1019 * Most likely AP is not in the range so remove the
77fdaa12 1020 * bss struct for that AP.
7a947080 1021 */
77fdaa12 1022 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1023
1024 /*
1025 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1026 * due to work needing to be done. Hence, queue the STAs work
1027 * again for that.
11432379 1028 */
42935eca 1029 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1030 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1031 }
f0706e82 1032
77fdaa12 1033 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
47846c9b 1034 sdata->name, wk->bss->cbss.bssid,
77fdaa12 1035 wk->tries);
f0706e82 1036
77fdaa12
JB		 1037 /*
1038 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 1039 * will not answer to direct packet in unassociated state.
1040 */
77fdaa12
JB		 1041 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
1042
1043 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1044 run_again(ifmgd, wk->timeout);
9ac19a90 1045
77fdaa12 1046 return RX_MGMT_NONE;
60f8b39c 1047}
f0706e82 1048
9ac19a90 1049
77fdaa12
JB		 1050static enum rx_mgmt_action __must_check
1051ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
1052 struct ieee80211_mgd_work *wk)
f0706e82 1053{
46900298 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1055 struct ieee80211_local *local = sdata->local;
46900298 1056
77fdaa12
JB		 1057 wk->tries++;
1058 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1059 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 1060 " timed out\n",
47846c9b 1061 sdata->name, wk->bss->cbss.bssid);
77fdaa12
JB		 1062
1063 /*
1064 * Most likely AP is not in the range so remove the
1065 * bss struct for that AP.
1066 */
1067 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1068
1069 /*
1070 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1071 * due to work needing to be done. Hence, queue the STAs work
1072 * again for that.
11432379 1073 */
42935eca 1074 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1075 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1076 }
f0706e82 1077
77fdaa12 1078 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
47846c9b 1079 sdata->name, wk->bss->cbss.bssid, wk->tries);
77fdaa12
JB		 1080
1081 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1082 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1083 wk->auth_transaction = 2;
f0706e82 1084
77fdaa12 1085 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1086 run_again(ifmgd, wk->timeout);
9ac19a90 1087
77fdaa12 1088 return RX_MGMT_NONE;
f0706e82
JB		 1089}
1090
63f170e0 1091static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 1092{
46900298 1093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1094 struct ieee80211_local *local = sdata->local;
1095 struct sta_info *sta;
e0cb686f 1096 u32 changed = 0, config_changed = 0;
b291ba11 1097 u8 bssid[ETH_ALEN];
aa458d17 1098
77fdaa12
JB		 1099 ASSERT_MGD_MTX(ifmgd);
1100
b291ba11
JB		 1101 if (WARN_ON(!ifmgd->associated))
1102 return;
1103
1104 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1105
77fdaa12
JB		 1106 ifmgd->associated = NULL;
1107 memset(ifmgd->bssid, 0, ETH_ALEN);
1108
1109 /*
1110 * we need to commit the associated = NULL change because the
1111 * scan code uses that to determine whether this iface should
1112 * go to/wake up from powersave or not -- and could otherwise
1113 * wake the queues erroneously.
1114 */
1115 smp_mb();
1116
1117 /*
1118 * Thus, we can only afterwards stop the queues -- to account
1119 * for the case where another CPU is finishing a scan at this
1120 * time -- we don't want the scan code to enable queues.
1121 */
aa458d17 1122
53623f1a 1123 netif_stop_queue(sdata->dev);
aa458d17
TW		 1124 netif_carrier_off(sdata->dev);
1125
1fa6f4af 1126 rcu_read_lock();
abe60632 1127 sta = sta_info_get(sdata, bssid);
1fa6f4af
JB		 1128 if (sta)
1129 ieee80211_sta_tear_down_BA_sessions(sta);
1130 rcu_read_unlock();
aa458d17 1131
f5e5bf25
TW		 1132 changed |= ieee80211_reset_erp_info(sdata);
1133
f5e5bf25 1134 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1135 changed |= BSS_CHANGED_ASSOC;
1136 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1137
aa837e1d
JB		 1138 ieee80211_set_wmm_default(sdata);
1139
4797938c 1140 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1141 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1142
413ad50a
JB		 1143 /* on the next assoc, re-program HT parameters */
1144 sdata->ht_opmode_valid = false;
1145
a8302de9
VT		 1146 local->power_constr_level = 0;
1147
520eb820
KV		 1148 del_timer_sync(&local->dynamic_ps_timer);
1149 cancel_work_sync(&local->dynamic_ps_enable_work);
1150
e0cb686f
KV		 1151 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1152 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1153 config_changed |= IEEE80211_CONF_CHANGE_PS;
1154 }
ae5eb026 1155
e0cb686f 1156 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1157
1158 /* And the BSSID changed -- not very interesting here */
1159 changed |= BSS_CHANGED_BSSID;
ae5eb026 1160 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1161
1162 rcu_read_lock();
1163
abe60632 1164 sta = sta_info_get(sdata, bssid);
8e268e47
TW		 1165 if (!sta) {
1166 rcu_read_unlock();
1167 return;
1168 }
1169
1170 sta_info_unlink(&sta);
1171
1172 rcu_read_unlock();
1173
1174 sta_info_destroy(sta);
aa458d17 1175}
f0706e82 1176
77fdaa12
JB		 1177static enum rx_mgmt_action __must_check
1178ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1179 struct ieee80211_mgd_work *wk)
f0706e82 1180{
46900298 1181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1182 struct ieee80211_local *local = sdata->local;
46900298 1183
77fdaa12
JB		 1184 wk->tries++;
1185 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1186 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1187 " timed out\n",
47846c9b 1188 sdata->name, wk->bss->cbss.bssid);
77fdaa12
JB		 1189
1190 /*
1191 * Most likely AP is not in the range so remove the
1192 * bss struct for that AP.
1193 */
1194 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1195
11432379
HS		 1196 /*
1197 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1198 * due to work needing to be done. Hence, queue the STAs work
1199 * again for that.
11432379 1200 */
42935eca 1201 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1202 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1203 }
1204
77fdaa12 1205 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
47846c9b 1206 sdata->name, wk->bss->cbss.bssid, wk->tries);
77fdaa12
JB		 1207 ieee80211_send_assoc(sdata, wk);
1208
1209 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1210 run_again(ifmgd, wk->timeout);
f0706e82 1211
77fdaa12 1212 return RX_MGMT_NONE;
f0706e82
JB		 1213}
1214
3cf335d5
KV		 1215void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1216 struct ieee80211_hdr *hdr)
1217{
1218 /*
1219 * We can postpone the mgd.timer whenever receiving unicast frames
1220 * from AP because we know that the connection is working both ways
1221 * at that time. But multicast frames (and hence also beacons) must
1222 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1223 * data idle periods for sending the periodic probe request to the
1224 * AP we're connected to.
3cf335d5 1225 */
b291ba11
JB		 1226 if (is_multicast_ether_addr(hdr->addr1))
1227 return;
1228
1229 mod_timer(&sdata->u.mgd.conn_mon_timer,
1230 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1231}
f0706e82 1232
a43abf29
ML		 1233static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1234{
1235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1236 const u8 *ssid;
1237
1238 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1239 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1240 ssid + 2, ssid[1], NULL, 0);
1241
1242 ifmgd->probe_send_count++;
1243 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1244 run_again(ifmgd, ifmgd->probe_timeout);
1245}
1246
b291ba11
JB		 1247static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1248 bool beacon)
04de8381 1249{
04de8381 1250 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1251 bool already = false;
34bfc411 1252
9607e6b6 1253 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1254 return;
1255
91a3bd76
LR		 1256 if (sdata->local->scanning)
1257 return;
1258
77fdaa12
JB		 1259 mutex_lock(&ifmgd->mtx);
1260
1261 if (!ifmgd->associated)
1262 goto out;
1263
a860402d 1264#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1265 if (beacon && net_ratelimit())
1266 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1267 "- sending probe request\n", sdata->name);
a860402d 1268#endif
04de8381 1269
b291ba11
JB		 1270 /*
1271 * The driver/our work has already reported this event or the
1272 * connection monitoring has kicked in and we have already sent
1273 * a probe request. Or maybe the AP died and the driver keeps
1274 * reporting until we disassociate...
1275 *
1276 * In either case we have to ignore the current call to this
1277 * function (except for setting the correct probe reason bit)
1278 * because otherwise we would reset the timer every time and
1279 * never check whether we received a probe response!
1280 */
1281 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1282 IEEE80211_STA_CONNECTION_POLL))
1283 already = true;
1284
1285 if (beacon)
1286 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1287 else
1288 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1289
1290 if (already)
1291 goto out;
1292
4e751843
JB		 1293 mutex_lock(&sdata->local->iflist_mtx);
1294 ieee80211_recalc_ps(sdata->local, -1);
1295 mutex_unlock(&sdata->local->iflist_mtx);
1296
a43abf29
ML		 1297 ifmgd->probe_send_count = 0;
1298 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1299 out:
1300 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1301}
1302
b291ba11
JB		 1303void ieee80211_beacon_loss_work(struct work_struct *work)
1304{
1305 struct ieee80211_sub_if_data *sdata =
1306 container_of(work, struct ieee80211_sub_if_data,
1307 u.mgd.beacon_loss_work);
1308
1309 ieee80211_mgd_probe_ap(sdata, true);
1310}
1311
04de8381
KV		 1312void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1313{
1314 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1315
42935eca 1316 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1317}
1318EXPORT_SYMBOL(ieee80211_beacon_loss);
1319
77fdaa12
JB		 1320static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1321 struct ieee80211_mgd_work *wk)
f0706e82 1322{
63f170e0
JB		 1323 list_del(&wk->list);
1324 kfree(wk);
47846c9b 1325 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
f0706e82
JB		 1326}
1327
1328
f698d856 1329static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1330 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1331 struct ieee80211_mgmt *mgmt,
1332 size_t len)
1333{
1334 u8 *pos;
1335 struct ieee802_11_elems elems;
1336
f0706e82 1337 pos = mgmt->u.auth.variable;
67a4cce4 1338 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1339 if (!elems.challenge)
f0706e82 1340 return;
77fdaa12 1341 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1342 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1343 wk->bss->cbss.bssid,
1344 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1345 wk->auth_transaction = 4;
fe3d2c3f
JB		 1346}
1347
77fdaa12
JB		 1348static enum rx_mgmt_action __must_check
1349ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1350 struct ieee80211_mgd_work *wk,
1351 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1352{
f0706e82
JB		 1353 u16 auth_alg, auth_transaction, status_code;
1354
77fdaa12
JB		 1355 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1356 return RX_MGMT_NONE;
f0706e82 1357
f4ea83dd 1358 if (len < 24 + 6)
77fdaa12 1359 return RX_MGMT_NONE;
f0706e82 1360
77fdaa12
JB		 1361 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1362 return RX_MGMT_NONE;
f0706e82 1363
77fdaa12
JB		 1364 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1365 return RX_MGMT_NONE;
f0706e82
JB		 1366
1367 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1368 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1369 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1370
77fdaa12
JB		 1371 if (auth_alg != wk->auth_alg ||
1372 auth_transaction != wk->auth_transaction)
1373 return RX_MGMT_NONE;
f0706e82
JB		 1374
1375 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1376 list_del(&wk->list);
1377 kfree(wk);
1378 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1379 }
1380
77fdaa12 1381 switch (wk->auth_alg) {
f0706e82
JB		 1382 case WLAN_AUTH_OPEN:
1383 case WLAN_AUTH_LEAP:
636a5d36 1384 case WLAN_AUTH_FT:
77fdaa12
JB		 1385 ieee80211_auth_completed(sdata, wk);
1386 return RX_MGMT_CFG80211_AUTH;
f0706e82 1387 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1388 if (wk->auth_transaction == 4) {
1389 ieee80211_auth_completed(sdata, wk);
1390 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1391 } else
77fdaa12 1392 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1393 break;
1394 }
77fdaa12
JB		 1395
1396 return RX_MGMT_NONE;
f0706e82
JB		 1397}
1398
1399
77fdaa12
JB		 1400static enum rx_mgmt_action __must_check
1401ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1402 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1403{
46900298 1404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1405 const u8 *bssid = NULL;
f0706e82
JB		 1406 u16 reason_code;
1407
f4ea83dd 1408 if (len < 24 + 2)
77fdaa12 1409 return RX_MGMT_NONE;
f0706e82 1410
77fdaa12
JB		 1411 ASSERT_MGD_MTX(ifmgd);
1412
63f170e0 1413 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1414
1415 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1416
77fdaa12 1417 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1418 sdata->name, bssid, reason_code);
77fdaa12 1419
63f170e0
JB		 1420 ieee80211_set_disassoc(sdata);
1421 ieee80211_recalc_idle(sdata->local);
f0706e82 1422
77fdaa12 1423 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1424}
1425
1426
77fdaa12
JB		 1427static enum rx_mgmt_action __must_check
1428ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1429 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1430{
46900298 1431 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1432 u16 reason_code;
1433
f4ea83dd 1434 if (len < 24 + 2)
77fdaa12 1435 return RX_MGMT_NONE;
f0706e82 1436
77fdaa12
JB		 1437 ASSERT_MGD_MTX(ifmgd);
1438
1439 if (WARN_ON(!ifmgd->associated))
1440 return RX_MGMT_NONE;
1441
1442 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1443 return RX_MGMT_NONE;
f0706e82
JB		 1444
1445 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1446
0ff71613 1447 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1448 sdata->name, mgmt->sa, reason_code);
f0706e82 1449
63f170e0 1450 ieee80211_set_disassoc(sdata);
bc83b681 1451 ieee80211_recalc_idle(sdata->local);
77fdaa12 1452 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1453}
1454
1455
77fdaa12
JB		 1456static enum rx_mgmt_action __must_check
1457ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1458 struct ieee80211_mgd_work *wk,
1459 struct ieee80211_mgmt *mgmt, size_t len,
1460 bool reassoc)
f0706e82 1461{
46900298 1462 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1463 struct ieee80211_local *local = sdata->local;
8318d78a 1464 struct ieee80211_supported_band *sband;
f0706e82 1465 struct sta_info *sta;
63f170e0 1466 struct ieee80211_bss *bss = wk->bss;
881d948c 1467 u32 rates, basic_rates;
f0706e82
JB		 1468 u16 capab_info, status_code, aid;
1469 struct ieee802_11_elems elems;
bda3933a 1470 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1471 u8 *pos;
ae5eb026 1472 u32 changed = 0;
5d1ec85f
JB		 1473 int i, j, err;
1474 bool have_higher_than_11mbit = false;
ae5eb026 1475 u16 ap_ht_cap_flags;
f0706e82 1476
77fdaa12
JB		 1477 /*
1478 * AssocResp and ReassocResp have identical structure, so process both
1479 * of them in this function.
1480 */
f0706e82 1481
f4ea83dd 1482 if (len < 24 + 6)
77fdaa12 1483 return RX_MGMT_NONE;
f0706e82 1484
63f170e0 1485 if (memcmp(bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
77fdaa12 1486 return RX_MGMT_NONE;
f0706e82
JB		 1487
1488 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1489 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1490 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1491
0c68ae26 1492 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1493 "status=%d aid=%d)\n",
47846c9b 1494 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1495 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1496
63a5ab82
JM		 1497 pos = mgmt->u.assoc_resp.variable;
1498 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1499
1500 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1501 elems.timeout_int && elems.timeout_int_len == 5 &&
1502 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1503 u32 tu, ms;
f797eb7e 1504 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1505 ms = tu * 1024 / 1000;
1506 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1507 "comeback duration %u TU (%u ms)\n",
47846c9b 1508 sdata->name, tu, ms);
77fdaa12 1509 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1510 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1511 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1512 return RX_MGMT_NONE;
63a5ab82
JM		 1513 }
1514
63f170e0
JB		 1515 /*
1516 * Here the association was either successful or not.
1517 */
1518
1519 /* delete work item -- must be before set_associated for PS */
1520 list_del(&wk->list);
1521 kfree(wk);
1522
f0706e82
JB		 1523 if (status_code != WLAN_STATUS_SUCCESS) {
1524 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
47846c9b 1525 sdata->name, status_code);
77fdaa12 1526 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1527 }
1528
1dd84aa2
JB		 1529 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1530 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1531 "set\n", sdata->name, aid);
1dd84aa2
JB		 1532 aid &= ~(BIT(15) | BIT(14));
1533
f0706e82
JB		 1534 if (!elems.supp_rates) {
1535 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1536 sdata->name);
77fdaa12 1537 return RX_MGMT_NONE;
f0706e82
JB		 1538 }
1539
47846c9b 1540 printk(KERN_DEBUG "%s: associated\n", sdata->name);
46900298 1541 ifmgd->aid = aid;
f0706e82 1542
63f170e0 1543 sta = sta_info_alloc(sdata, bss->cbss.bssid, GFP_KERNEL);
f0706e82 1544 if (!sta) {
5d1ec85f
JB		 1545 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1546 " the AP\n", sdata->name);
1547 return RX_MGMT_CFG80211_ASSOC_ERROR;
77fdaa12 1548 }
05e5e883 1549
5d1ec85f
JB		 1550 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1551 WLAN_STA_ASSOC_AP);
1552 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1553 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1554
60f8b39c
JB		 1555 rates = 0;
1556 basic_rates = 0;
1557 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1558
60f8b39c
JB		 1559 for (i = 0; i < elems.supp_rates_len; i++) {
1560 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1561 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1562
60f8b39c
JB		 1563 if (rate > 110)
1564 have_higher_than_11mbit = true;
1565
1566 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1567 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1568 rates |= BIT(j);
d61272cb
TW		 1569 if (is_basic)
1570 basic_rates |= BIT(j);
1571 break;
1572 }
f709fc69 1573 }
f709fc69
LCC		 1574 }
1575
60f8b39c
JB		 1576 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1577 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1578 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1579
60f8b39c
JB		 1580 if (rate > 110)
1581 have_higher_than_11mbit = true;
f0706e82 1582
60f8b39c 1583 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1584 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1585 rates |= BIT(j);
d61272cb
TW		 1586 if (is_basic)
1587 basic_rates |= BIT(j);
1588 break;
1589 }
60f8b39c 1590 }
1ebebea8 1591 }
f0706e82 1592
323ce79a 1593 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1594 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1595
1596 /* cf. IEEE 802.11 9.2.12 */
1597 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1598 have_higher_than_11mbit)
1599 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1600 else
1601 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1602
ab1faead 1603 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1604 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1605 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1606
1607 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1608
4b7679a5 1609 rate_control_rate_init(sta);
f0706e82 1610
46900298 1611 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1612 set_sta_flags(sta, WLAN_STA_MFP);
1613
ddf4ac53 1614 if (elems.wmm_param)
60f8b39c 1615 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1616
5d1ec85f
JB		 1617 err = sta_info_insert(sta);
1618 sta = NULL;
1619 if (err) {
1620 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1621 " the AP (error %d)\n", sdata->name, err);
1622 return RX_MGMT_CFG80211_ASSOC_ERROR;
ddf4ac53
JB		 1623 }
1624
ddf4ac53 1625 if (elems.wmm_param)
46900298 1626 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1627 elems.wmm_param_len);
aa837e1d
JB		 1628 else
1629 ieee80211_set_wmm_default(sdata);
f0706e82 1630
ae5eb026 1631 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1632 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1633 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1634 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
63f170e0 1635 bss->cbss.bssid,
ae5eb026
JB		 1636 ap_ht_cap_flags);
1637
60f8b39c
JB		 1638 /* set AID and assoc capability,
1639 * ieee80211_set_associated() will tell the driver */
1640 bss_conf->aid = aid;
1641 bss_conf->assoc_capability = capab_info;
63f170e0 1642 ieee80211_set_associated(sdata, bss, changed);
f0706e82 1643
15b7b062 1644 /*
b291ba11
JB		 1645 * Start timer to probe the connection to the AP now.
1646 * Also start the timer that will detect beacon loss.
15b7b062 1647 */
b291ba11
JB		 1648 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1649 mod_beacon_timer(sdata);
15b7b062 1650
77fdaa12 1651 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1652}
1653
1654
98c8fccf
JB		 1655static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1656 struct ieee80211_mgmt *mgmt,
1657 size_t len,
1658 struct ieee80211_rx_status *rx_status,
1659 struct ieee802_11_elems *elems,
1660 bool beacon)
1661{
1662 struct ieee80211_local *local = sdata->local;
1663 int freq;
c2b13452 1664 struct ieee80211_bss *bss;
98c8fccf 1665 struct ieee80211_channel *channel;
98c8fccf
JB		 1666
1667 if (elems->ds_params && elems->ds_params_len == 1)
1668 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1669 else
1670 freq = rx_status->freq;
1671
1672 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1673
1674 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1675 return;
1676
98c8fccf 1677 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1678 channel, beacon);
77fdaa12
JB		 1679 if (bss)
1680 ieee80211_rx_bss_put(local, bss);
1681
1682 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1683 return;
1684
c481ec97 1685 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1686 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1687 ETH_ALEN) == 0)) {
c481ec97
S		 1688 struct ieee80211_channel_sw_ie *sw_elem =
1689 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1690 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1691 }
f0706e82
JB		 1692}
1693
1694
f698d856 1695static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1696 struct ieee80211_mgd_work *wk,
1697 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1698 struct ieee80211_rx_status *rx_status)
1699{
15b7b062 1700 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1701 size_t baselen;
1702 struct ieee802_11_elems elems;
1703
15b7b062
KV		 1704 ifmgd = &sdata->u.mgd;
1705
77fdaa12
JB		 1706 ASSERT_MGD_MTX(ifmgd);
1707
47846c9b 1708 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1709 return; /* ignore ProbeResp to foreign address */
1710
ae6a44e3
EK		 1711 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1712 if (baselen > len)
1713 return;
1714
1715 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1716 &elems);
1717
98c8fccf 1718 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1719
1720 /* direct probe may be part of the association flow */
77fdaa12 1721 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
0ff71613 1722 printk(KERN_DEBUG "%s: direct probe responded\n",
47846c9b 1723 sdata->name);
77fdaa12
JB		 1724 wk->tries = 0;
1725 wk->state = IEEE80211_MGD_STATE_AUTH;
1726 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1727 }
15b7b062 1728
77fdaa12
JB		 1729 if (ifmgd->associated &&
1730 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1731 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1732 IEEE80211_STA_CONNECTION_POLL)) {
1733 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1734 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1735 mutex_lock(&sdata->local->iflist_mtx);
1736 ieee80211_recalc_ps(sdata->local, -1);
1737 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1738 /*
1739 * We've received a probe response, but are not sure whether
1740 * we have or will be receiving any beacons or data, so let's
1741 * schedule the timers again, just in case.
1742 */
1743 mod_beacon_timer(sdata);
1744 mod_timer(&ifmgd->conn_mon_timer,
1745 round_jiffies_up(jiffies +
1746 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1747 }
f0706e82
JB		 1748}
1749
d91f36db
JB		 1750/*
1751 * This is the canonical list of information elements we care about,
1752 * the filter code also gives us all changes to the Microsoft OUI
1753 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1754 *
1755 * We implement beacon filtering in software since that means we can
1756 * avoid processing the frame here and in cfg80211, and userspace
1757 * will not be able to tell whether the hardware supports it or not.
1758 *
1759 * XXX: This list needs to be dynamic -- userspace needs to be able to
1760 * add items it requires. It also needs to be able to tell us to
1761 * look out for other vendor IEs.
1762 */
1763static const u64 care_about_ies =
1d4df3a5
JB		 1764 (1ULL << WLAN_EID_COUNTRY) |
1765 (1ULL << WLAN_EID_ERP_INFO) |
1766 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1767 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1768 (1ULL << WLAN_EID_HT_CAPABILITY) |
1769 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1770
f698d856 1771static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1772 struct ieee80211_mgmt *mgmt,
1773 size_t len,
1774 struct ieee80211_rx_status *rx_status)
1775{
d91f36db 1776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1777 size_t baselen;
1778 struct ieee802_11_elems elems;
f698d856 1779 struct ieee80211_local *local = sdata->local;
471b3efd 1780 u32 changed = 0;
d91f36db 1781 bool erp_valid, directed_tim = false;
7a5158ef 1782 u8 erp_value = 0;
d91f36db 1783 u32 ncrc;
77fdaa12
JB		 1784 u8 *bssid;
1785
1786 ASSERT_MGD_MTX(ifmgd);
f0706e82 1787
ae6a44e3
EK		 1788 /* Process beacon from the current BSS */
1789 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1790 if (baselen > len)
1791 return;
1792
d91f36db 1793 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1794 return;
f0706e82 1795
b291ba11
JB		 1796 /*
1797 * We might have received a number of frames, among them a
1798 * disassoc frame and a beacon...
1799 */
1800 if (!ifmgd->associated)
77fdaa12
JB		 1801 return;
1802
1803 bssid = ifmgd->associated->cbss.bssid;
1804
b291ba11
JB		 1805 /*
1806 * And in theory even frames from a different AP we were just
1807 * associated to a split-second ago!
1808 */
1809 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1810 return;
1811
b291ba11 1812 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1813#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1814 if (net_ratelimit()) {
1815 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1816 "to a received beacon\n", sdata->name);
92778180
JM		 1817 }
1818#endif
b291ba11 1819 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1820 mutex_lock(&local->iflist_mtx);
1821 ieee80211_recalc_ps(local, -1);
1822 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1823 }
1824
b291ba11
JB		 1825 /*
1826 * Push the beacon loss detection into the future since
1827 * we are processing a beacon from the AP just now.
1828 */
1829 mod_beacon_timer(sdata);
1830
d91f36db
JB		 1831 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1832 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1833 len - baselen, &elems,
1834 care_about_ies, ncrc);
1835
1836 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1837 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1838 ifmgd->aid);
d91f36db 1839
30196673
JM		 1840 if (ncrc != ifmgd->beacon_crc) {
1841 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1842 true);
d91f36db 1843
30196673
JM		 1844 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1845 elems.wmm_param_len);
1846 }
fe3fa827 1847
25c9c875 1848 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1849 if (directed_tim) {
572e0012
KV		 1850 if (local->hw.conf.dynamic_ps_timeout > 0) {
1851 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1852 ieee80211_hw_config(local,
1853 IEEE80211_CONF_CHANGE_PS);
1854 ieee80211_send_nullfunc(local, sdata, 0);
1855 } else {
1856 local->pspolling = true;
1857
1858 /*
1859 * Here is assumed that the driver will be
1860 * able to send ps-poll frame and receive a
1861 * response even though power save mode is
1862 * enabled, but some drivers might require
1863 * to disable power save here. This needs
1864 * to be investigated.
1865 */
1866 ieee80211_send_pspoll(local, sdata);
1867 }
a97b77b9
VN		 1868 }
1869 }
7a5158ef 1870
30196673
JM		 1871 if (ncrc == ifmgd->beacon_crc)
1872 return;
1873 ifmgd->beacon_crc = ncrc;
1874
7a5158ef
JB		 1875 if (elems.erp_info && elems.erp_info_len >= 1) {
1876 erp_valid = true;
1877 erp_value = elems.erp_info[0];
1878 } else {
1879 erp_valid = false;
50c4afb9 1880 }
7a5158ef
JB		 1881 changed |= ieee80211_handle_bss_capability(sdata,
1882 le16_to_cpu(mgmt->u.beacon.capab_info),
1883 erp_valid, erp_value);
f0706e82 1884
d3c990fb 1885
53d6f81c 1886 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1887 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1888 struct sta_info *sta;
1889 struct ieee80211_supported_band *sband;
1890 u16 ap_ht_cap_flags;
1891
1892 rcu_read_lock();
1893
abe60632 1894 sta = sta_info_get(sdata, bssid);
77fdaa12 1895 if (WARN_ON(!sta)) {
ae5eb026
JB		 1896 rcu_read_unlock();
1897 return;
1898 }
1899
1900 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1901
1902 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1903 elems.ht_cap_elem, &sta->sta.ht_cap);
1904
1905 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1906
1907 rcu_read_unlock();
1908
1909 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1910 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1911 }
1912
8b19e6ca 1913 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1914 if (elems.country_elem) {
a8302de9
VT		 1915 /* TODO: IBSS also needs this */
1916 if (elems.pwr_constr_elem)
1917 ieee80211_handle_pwr_constr(sdata,
1918 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1919 elems.pwr_constr_elem,
1920 elems.pwr_constr_elem_len);
3f2355cb
LR		 1921 }
1922
471b3efd 1923 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1924}
1925
46900298 1926ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1927 struct sk_buff *skb)
f0706e82 1928{
f698d856 1929 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1930 struct ieee80211_mgmt *mgmt;
1931 u16 fc;
1932
1933 if (skb->len < 24)
46900298 1934 return RX_DROP_MONITOR;
f0706e82
JB		 1935
1936 mgmt = (struct ieee80211_mgmt *) skb->data;
1937 fc = le16_to_cpu(mgmt->frame_control);
1938
1939 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1940 case IEEE80211_STYPE_PROBE_RESP:
1941 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1942 case IEEE80211_STYPE_AUTH:
1943 case IEEE80211_STYPE_ASSOC_RESP:
1944 case IEEE80211_STYPE_REASSOC_RESP:
1945 case IEEE80211_STYPE_DEAUTH:
1946 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1947 case IEEE80211_STYPE_ACTION:
46900298 1948 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1949 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1950 return RX_QUEUED;
f0706e82
JB		 1951 }
1952
46900298 1953 return RX_DROP_MONITOR;
f0706e82
JB		 1954}
1955
f698d856 1956static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1957 struct sk_buff *skb)
1958{
77fdaa12 1959 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1960 struct ieee80211_rx_status *rx_status;
f0706e82 1961 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1962 struct ieee80211_mgd_work *wk;
1963 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1964 u16 fc;
1965
f0706e82
JB		 1966 rx_status = (struct ieee80211_rx_status *) skb->cb;
1967 mgmt = (struct ieee80211_mgmt *) skb->data;
1968 fc = le16_to_cpu(mgmt->frame_control);
1969
77fdaa12
JB		 1970 mutex_lock(&ifmgd->mtx);
1971
1972 if (ifmgd->associated &&
1973 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1974 ETH_ALEN) == 0) {
1975 switch (fc & IEEE80211_FCTL_STYPE) {
1976 case IEEE80211_STYPE_BEACON:
1977 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1978 rx_status);
1979 break;
1980 case IEEE80211_STYPE_PROBE_RESP:
1981 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1982 skb->len, rx_status);
1983 break;
1984 case IEEE80211_STYPE_DEAUTH:
63f170e0 1985 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
77fdaa12
JB		 1986 break;
1987 case IEEE80211_STYPE_DISASSOC:
1988 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1989 break;
1990 case IEEE80211_STYPE_ACTION:
1991 /* XXX: differentiate, can only happen for CSA now! */
1992 ieee80211_sta_process_chanswitch(sdata,
1993 &mgmt->u.action.u.chan_switch.sw_elem,
1994 ifmgd->associated);
1995 break;
1996 }
1997 mutex_unlock(&ifmgd->mtx);
1998
1999 switch (rma) {
2000 case RX_MGMT_NONE:
2001 /* no action */
2002 break;
2003 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2004 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2005 break;
2006 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2007 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2008 break;
2009 default:
2010 WARN(1, "unexpected: %d", rma);
2011 }
2012 goto out;
2013 }
2014
2015 list_for_each_entry(wk, &ifmgd->work_list, list) {
2016 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
2017 continue;
2018
2019 switch (fc & IEEE80211_FCTL_STYPE) {
2020 case IEEE80211_STYPE_PROBE_RESP:
2021 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
2022 rx_status);
2023 break;
2024 case IEEE80211_STYPE_AUTH:
2025 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
2026 break;
2027 case IEEE80211_STYPE_ASSOC_RESP:
2028 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2029 skb->len, false);
2030 break;
2031 case IEEE80211_STYPE_REASSOC_RESP:
2032 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2033 skb->len, true);
2034 break;
2035 case IEEE80211_STYPE_DEAUTH:
63f170e0
JB		 2036 if (skb->len >= 24 + 2 /* mgmt + deauth reason */) {
2037 /*
2038 * We get here if we get deauth while
2039 * trying to auth/assoc. Telling cfg80211
2040 * is handled below, unconditionally.
2041 */
2042 list_del(&wk->list);
2043 kfree(wk);
2044 }
77fdaa12
JB		 2045 break;
2046 }
2047 /*
2048 * We've processed this frame for that work, so it can't
2049 * belong to another work struct.
2050 * NB: this is also required for correctness because the
2051 * called functions can free 'wk', and for 'rma'!
2052 */
46900298 2053 break;
77fdaa12
JB		 2054 }
2055
2056 mutex_unlock(&ifmgd->mtx);
2057
63f170e0
JB		 2058 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
2059 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
2060 WARN_ON(rma != RX_MGMT_NONE);
2061 rma = RX_MGMT_CFG80211_DEAUTH;
2062 }
2063
77fdaa12
JB		 2064 switch (rma) {
2065 case RX_MGMT_NONE:
2066 /* no action */
46900298 2067 break;
77fdaa12 2068 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2069 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2070 break;
77fdaa12 2071 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2072 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2073 break;
8d8b261a 2074 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2075 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2076 break;
5d1ec85f
JB		 2077 case RX_MGMT_CFG80211_ASSOC_ERROR:
2078 /* an internal error -- pretend timeout for now */
2079 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2080 break;
77fdaa12
JB		 2081 default:
2082 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2083 }
2084
77fdaa12 2085 out:
f0706e82
JB		 2086 kfree_skb(skb);
2087}
2088
9c6bd790 2089static void ieee80211_sta_timer(unsigned long data)
f0706e82 2090{
60f8b39c
JB		 2091 struct ieee80211_sub_if_data *sdata =
2092 (struct ieee80211_sub_if_data *) data;
46900298 2093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2094 struct ieee80211_local *local = sdata->local;
f0706e82 2095
5bb644a0
JB		 2096 if (local->quiescing) {
2097 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2098 return;
2099 }
2100
42935eca 2101 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2102}
2103
9c6bd790
JB		 2104static void ieee80211_sta_work(struct work_struct *work)
2105{
2106 struct ieee80211_sub_if_data *sdata =
46900298 2107 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2108 struct ieee80211_local *local = sdata->local;
46900298 2109 struct ieee80211_if_managed *ifmgd;
9c6bd790 2110 struct sk_buff *skb;
77fdaa12
JB		 2111 struct ieee80211_mgd_work *wk, *tmp;
2112 LIST_HEAD(free_work);
2113 enum rx_mgmt_action rma;
9c6bd790 2114
9607e6b6 2115 if (!ieee80211_sdata_running(sdata))
9c6bd790
JB		 2116 return;
2117
fbe9c429 2118 if (local->scanning)
9c6bd790
JB		 2119 return;
2120
46900298 2121 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2122 return;
5bb644a0
JB		 2123
2124 /*
42935eca
LR		 2125 * ieee80211_queue_work() should have picked up most cases,
2126 * here we'll pick the the rest.
5bb644a0 2127 */
42935eca
LR		 2128 if (WARN(local->suspended, "STA MLME work scheduled while "
2129 "going to suspend\n"))
5bb644a0
JB		 2130 return;
2131
46900298 2132 ifmgd = &sdata->u.mgd;
f0706e82 2133
77fdaa12 2134 /* first process frames to avoid timing out while a frame is pending */
46900298 2135 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2136 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2137
77fdaa12
JB		 2138 /* then process the rest of the work */
2139 mutex_lock(&ifmgd->mtx);
2140
b291ba11
JB		 2141 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2142 IEEE80211_STA_CONNECTION_POLL) &&
2143 ifmgd->associated) {
a43abf29
ML		 2144 u8 bssid[ETH_ALEN];
2145
2146 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2147 if (time_is_after_jiffies(ifmgd->probe_timeout))
2148 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2149
2150 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2151#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2152 printk(KERN_DEBUG "No probe response from AP %pM"
2153 " after %dms, try %d\n", bssid,
2154 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2155 ifmgd->probe_send_count);
2156#endif
2157 ieee80211_mgd_probe_ap_send(sdata);
2158 } else {
b291ba11
JB		 2159 /*
2160 * We actually lost the connection ... or did we?
2161 * Let's make sure!
2162 */
2163 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2164 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2165 printk(KERN_DEBUG "No probe response from AP %pM"
2166 " after %dms, disconnecting.\n",
2167 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
63f170e0 2168 ieee80211_set_disassoc(sdata);
bc83b681 2169 ieee80211_recalc_idle(local);
b291ba11
JB		 2170 mutex_unlock(&ifmgd->mtx);
2171 /*
2172 * must be outside lock due to cfg80211,
2173 * but that's not a problem.
2174 */
2175 ieee80211_send_deauth_disassoc(sdata, bssid,
2176 IEEE80211_STYPE_DEAUTH,
2177 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2178 NULL);
2179 mutex_lock(&ifmgd->mtx);
2180 }
2181 }
2182
f0706e82 2183
77fdaa12
JB		 2184 ieee80211_recalc_idle(local);
2185
77fdaa12 2186 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2187 if (time_is_after_jiffies(wk->timeout)) {
2188 /*
2189 * This work item isn't supposed to be worked on
2190 * right now, but take care to adjust the timer
2191 * properly.
2192 */
2193 run_again(ifmgd, wk->timeout);
77fdaa12 2194 continue;
ca386f31 2195 }
5cff20e6 2196
77fdaa12
JB		 2197 switch (wk->state) {
2198 default:
2199 WARN_ON(1);
77fdaa12
JB		 2200 /* nothing */
2201 rma = RX_MGMT_NONE;
2202 break;
2203 case IEEE80211_MGD_STATE_PROBE:
2204 rma = ieee80211_direct_probe(sdata, wk);
2205 break;
2206 case IEEE80211_MGD_STATE_AUTH:
2207 rma = ieee80211_authenticate(sdata, wk);
2208 break;
2209 case IEEE80211_MGD_STATE_ASSOC:
2210 rma = ieee80211_associate(sdata, wk);
2211 break;
2212 }
2213
2214 switch (rma) {
2215 case RX_MGMT_NONE:
2216 /* no action required */
2217 break;
2218 case RX_MGMT_CFG80211_AUTH_TO:
2219 case RX_MGMT_CFG80211_ASSOC_TO:
2220 list_del(&wk->list);
2221 list_add(&wk->list, &free_work);
63f170e0
JB		 2222 /*
2223 * small abuse but only local -- keep the
2224 * action type in wk->timeout while the item
2225 * is on the cleanup list
2226 */
2227 wk->timeout = rma;
77fdaa12
JB		 2228 break;
2229 default:
2230 WARN(1, "unexpected: %d", rma);
2231 }
2232 }
2233
63f170e0 2234 if (list_empty(&ifmgd->work_list) &&
5bf6fcc2
JM		 2235 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2236 ieee80211_queue_delayed_work(&local->hw,
2237 &local->scan_work,
2238 round_jiffies_relative(0));
2239
77fdaa12
JB		 2240 mutex_unlock(&ifmgd->mtx);
2241
2242 list_for_each_entry_safe(wk, tmp, &free_work, list) {
63f170e0
JB		 2243 /* see above how we're using wk->timeout */
2244 switch (wk->timeout) {
77fdaa12
JB		 2245 case RX_MGMT_CFG80211_AUTH_TO:
2246 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2247 wk->bss->cbss.bssid);
77fdaa12
JB		 2248 break;
2249 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2250 cfg80211_send_assoc_timeout(sdata->dev,
2251 wk->bss->cbss.bssid);
77fdaa12
JB		 2252 break;
2253 default:
63f170e0 2254 WARN(1, "unexpected: %lu", wk->timeout);
77fdaa12
JB		 2255 }
2256
2257 list_del(&wk->list);
2258 kfree(wk);
9c6bd790 2259 }
77fdaa12
JB		 2260
2261 ieee80211_recalc_idle(local);
f0706e82
JB		 2262}
2263
b291ba11
JB		 2264static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2265{
2266 struct ieee80211_sub_if_data *sdata =
2267 (struct ieee80211_sub_if_data *) data;
2268 struct ieee80211_local *local = sdata->local;
2269
2270 if (local->quiescing)
2271 return;
2272
42935eca 2273 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2274}
2275
2276static void ieee80211_sta_conn_mon_timer(unsigned long data)
2277{
2278 struct ieee80211_sub_if_data *sdata =
2279 (struct ieee80211_sub_if_data *) data;
2280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2281 struct ieee80211_local *local = sdata->local;
2282
2283 if (local->quiescing)
2284 return;
2285
42935eca 2286 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2287}
2288
2289static void ieee80211_sta_monitor_work(struct work_struct *work)
2290{
2291 struct ieee80211_sub_if_data *sdata =
2292 container_of(work, struct ieee80211_sub_if_data,
2293 u.mgd.monitor_work);
2294
2295 ieee80211_mgd_probe_ap(sdata, false);
2296}
2297
9c6bd790
JB		 2298static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2299{
ad935687 2300 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2301 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2302 IEEE80211_STA_CONNECTION_POLL);
ad935687 2303
b291ba11 2304 /* let's probe the connection once */
42935eca 2305 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2306 &sdata->u.mgd.monitor_work);
2307 /* and do all the other regular work too */
42935eca 2308 ieee80211_queue_work(&sdata->local->hw,
46900298 2309 &sdata->u.mgd.work);
ad935687 2310 }
9c6bd790 2311}
f0706e82 2312
5bb644a0
JB		 2313#ifdef CONFIG_PM
2314void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2315{
2316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2317
2318 /*
2319 * we need to use atomic bitops for the running bits
2320 * only because both timers might fire at the same
2321 * time -- the code here is properly synchronised.
2322 */
2323
2324 cancel_work_sync(&ifmgd->work);
2325 cancel_work_sync(&ifmgd->beacon_loss_work);
2326 if (del_timer_sync(&ifmgd->timer))
2327 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2328
2329 cancel_work_sync(&ifmgd->chswitch_work);
2330 if (del_timer_sync(&ifmgd->chswitch_timer))
2331 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2332
2333 cancel_work_sync(&ifmgd->monitor_work);
2334 /* these will just be re-established on connection */
2335 del_timer_sync(&ifmgd->conn_mon_timer);
2336 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2337}
2338
2339void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2340{
2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2342
2343 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2344 add_timer(&ifmgd->timer);
2345 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2346 add_timer(&ifmgd->chswitch_timer);
2347}
2348#endif
2349
9c6bd790
JB		 2350/* interface setup */
2351void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2352{
46900298 2353 struct ieee80211_if_managed *ifmgd;
988c0f72 2354
46900298
JB		 2355 ifmgd = &sdata->u.mgd;
2356 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2357 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2358 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2359 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2360 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2361 (unsigned long) sdata);
b291ba11
JB		 2362 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2363 (unsigned long) sdata);
2364 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2365 (unsigned long) sdata);
46900298 2366 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2367 (unsigned long) sdata);
46900298 2368 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2369
77fdaa12
JB		 2370 INIT_LIST_HEAD(&ifmgd->work_list);
2371
46900298 2372 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2373 ifmgd->flags = 0;
176be728 2374 if (sdata->local->hw.queues >= 4)
46900298 2375 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2376
77fdaa12 2377 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2378
2379 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2380 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2381 else
2382 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2383}
2384
77fdaa12
JB		 2385/* scan finished notification */
2386void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2387{
77fdaa12 2388 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2389
77fdaa12
JB		 2390 /* Restart STA timers */
2391 rcu_read_lock();
2392 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2393 ieee80211_restart_sta_timer(sdata);
2394 rcu_read_unlock();
2395}
60f8b39c 2396
77fdaa12
JB		 2397int ieee80211_max_network_latency(struct notifier_block *nb,
2398 unsigned long data, void *dummy)
2399{
2400 s32 latency_usec = (s32) data;
2401 struct ieee80211_local *local =
2402 container_of(nb, struct ieee80211_local,
2403 network_latency_notifier);
1fa6f4af 2404
77fdaa12
JB		 2405 mutex_lock(&local->iflist_mtx);
2406 ieee80211_recalc_ps(local, latency_usec);
2407 mutex_unlock(&local->iflist_mtx);
dfe67012 2408
77fdaa12 2409 return 0;
9c6bd790
JB		 2410}
2411
77fdaa12
JB		 2412/* config hooks */
2413int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2414 struct cfg80211_auth_request *req)
9c6bd790 2415{
46900298 2416 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2417 const u8 *ssid;
2418 struct ieee80211_mgd_work *wk;
2419 u16 auth_alg;
9c6bd790 2420
77fdaa12
JB		 2421 switch (req->auth_type) {
2422 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2423 auth_alg = WLAN_AUTH_OPEN;
2424 break;
2425 case NL80211_AUTHTYPE_SHARED_KEY:
2426 auth_alg = WLAN_AUTH_SHARED_KEY;
2427 break;
2428 case NL80211_AUTHTYPE_FT:
2429 auth_alg = WLAN_AUTH_FT;
2430 break;
2431 case NL80211_AUTHTYPE_NETWORK_EAP:
2432 auth_alg = WLAN_AUTH_LEAP;
2433 break;
2434 default:
2435 return -EOPNOTSUPP;
60f8b39c 2436 }
77fdaa12
JB		 2437
2438 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2439 if (!wk)
9c6bd790 2440 return -ENOMEM;
77fdaa12
JB		 2441
2442 wk->bss = (void *)req->bss;
2443
2444 if (req->ie && req->ie_len) {
2445 memcpy(wk->ie, req->ie, req->ie_len);
2446 wk->ie_len = req->ie_len;
9c6bd790 2447 }
77fdaa12 2448
fffd0934
JB		 2449 if (req->key && req->key_len) {
2450 wk->key_len = req->key_len;
2451 wk->key_idx = req->key_idx;
2452 memcpy(wk->key, req->key, req->key_len);
2453 }
2454
77fdaa12
JB		 2455 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2456 memcpy(wk->ssid, ssid + 2, ssid[1]);
2457 wk->ssid_len = ssid[1];
2458
2459 wk->state = IEEE80211_MGD_STATE_PROBE;
2460 wk->auth_alg = auth_alg;
48531847 2461 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2462
2463 /*
2464 * XXX: if still associated need to tell AP that we're going
2465 * to sleep and then change channel etc.
2466 */
2467 sdata->local->oper_channel = req->bss->channel;
2468 ieee80211_hw_config(sdata->local, 0);
2469
2470 mutex_lock(&ifmgd->mtx);
2471 list_add(&wk->list, &sdata->u.mgd.work_list);
2472 mutex_unlock(&ifmgd->mtx);
2473
42935eca 2474 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2475 return 0;
60f8b39c
JB		 2476}
2477
77fdaa12
JB		 2478int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2479 struct cfg80211_assoc_request *req)
f0706e82 2480{
77fdaa12 2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
63f170e0
JB		 2482 struct ieee80211_mgd_work *wk;
2483 const u8 *ssid;
77fdaa12 2484 int i, err;
f0706e82 2485
77fdaa12
JB		 2486 mutex_lock(&ifmgd->mtx);
2487
63f170e0 2488 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
77fdaa12 2489 if (!wk) {
77fdaa12
JB		 2490 err = -ENOMEM;
2491 goto out;
2492 }
2493
77fdaa12
JB		 2494 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2495
2496 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2497 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2498 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2499 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2500 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2501
77fdaa12
JB		 2502
2503 if (req->ie && req->ie_len) {
2504 memcpy(wk->ie, req->ie, req->ie_len);
2505 wk->ie_len = req->ie_len;
2506 } else
2507 wk->ie_len = 0;
2508
63f170e0
JB		 2509 wk->bss = (void *)req->bss;
2510
2511 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2512 memcpy(wk->ssid, ssid + 2, ssid[1]);
2513 wk->ssid_len = ssid[1];
2514
77fdaa12
JB		 2515 if (req->prev_bssid)
2516 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2517
2518 wk->state = IEEE80211_MGD_STATE_ASSOC;
48531847 2519 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2520
2521 if (req->use_mfp) {
2522 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2523 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2524 } else {
2525 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2526 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2527 }
2528
2529 if (req->crypto.control_port)
2530 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2531 else
2532 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2533
63f170e0
JB		 2534 sdata->local->oper_channel = req->bss->channel;
2535 ieee80211_hw_config(sdata->local, 0);
2536
2537 list_add(&wk->list, &ifmgd->work_list);
42935eca 2538 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2539
2540 err = 0;
2541
2542 out:
2543 mutex_unlock(&ifmgd->mtx);
2544 return err;
f0706e82
JB		 2545}
2546
77fdaa12 2547int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2548 struct cfg80211_deauth_request *req,
2549 void *cookie)
f0706e82 2550{
46900298 2551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2552 struct ieee80211_mgd_work *wk;
63f170e0 2553 const u8 *bssid = req->bss->bssid;
a58ce43f 2554 bool not_auth_yet = false;
f0706e82 2555
77fdaa12
JB		 2556 mutex_lock(&ifmgd->mtx);
2557
2558 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2559 bssid = req->bss->bssid;
63f170e0 2560 ieee80211_set_disassoc(sdata);
77fdaa12 2561 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
63f170e0
JB		 2562 if (wk->state != IEEE80211_MGD_STATE_PROBE)
2563 continue;
2564 if (req->bss != &wk->bss->cbss)
2565 continue;
2566 not_auth_yet = true;
2567 list_del(&wk->list);
2568 kfree(wk);
2569 break;
77fdaa12 2570 }
f0706e82 2571
a58ce43f
JB		 2572 /*
2573 * If somebody requests authentication and we haven't
2574 * sent out an auth frame yet there's no need to send
2575 * out a deauth frame either. If the state was PROBE,
2576 * then this is the case. If it's AUTH we have sent a
2577 * frame, and if it's IDLE we have completed the auth
2578 * process already.
2579 */
2580 if (not_auth_yet) {
2581 mutex_unlock(&ifmgd->mtx);
2582 __cfg80211_auth_canceled(sdata->dev, bssid);
2583 return 0;
2584 }
2585
77fdaa12
JB		 2586 mutex_unlock(&ifmgd->mtx);
2587
0ff71613 2588 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2589 sdata->name, bssid, req->reason_code);
0ff71613 2590
77fdaa12 2591 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2592 IEEE80211_STYPE_DEAUTH, req->reason_code,
2593 cookie);
f0706e82 2594
bc83b681
JB		 2595 ieee80211_recalc_idle(sdata->local);
2596
f0706e82
JB		 2597 return 0;
2598}
84363e6e 2599
77fdaa12 2600int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2601 struct cfg80211_disassoc_request *req,
2602 void *cookie)
9c6bd790 2603{
77fdaa12 2604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2605
77fdaa12 2606 mutex_lock(&ifmgd->mtx);
10f644a4 2607
8d8b261a
JB		 2608 /*
2609 * cfg80211 should catch this ... but it's racy since
2610 * we can receive a disassoc frame, process it, hand it
2611 * to cfg80211 while that's in a locked section already
2612 * trying to tell us that the user wants to disconnect.
2613 */
2614 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2615 mutex_unlock(&ifmgd->mtx);
2616 return -ENOLINK;
2617 }
2618
0ff71613 2619 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2620 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2621
63f170e0 2622 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2623
2624 mutex_unlock(&ifmgd->mtx);
10f644a4 2625
77fdaa12 2626 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2627 IEEE80211_STYPE_DISASSOC, req->reason_code,
2628 cookie);
bc83b681
JB		 2629
2630 ieee80211_recalc_idle(sdata->local);
2631
10f644a4
JB		 2632 return 0;
2633}
Linux kernel - Deliverables
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