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rtl8187: remove priv->mode
[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
607 if (!netif_running(sdata->dev))
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) {
753 if (!netif_running(sdata->dev))
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,
e21546a2 952 struct ieee80211_mgd_work *wk,
ae5eb026 953 u32 bss_info_changed)
f0706e82 954{
471b3efd 955 struct ieee80211_local *local = sdata->local;
e21546a2 956 struct ieee80211_bss *bss = wk->bss;
d6f2da5b 957
ae5eb026 958 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 959 /* set timing information */
960 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
961 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
962 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 963
77fdaa12
JB		 964 bss_info_changed |= BSS_CHANGED_BEACON_INT;
965 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
966 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 967
77fdaa12 968 sdata->u.mgd.associated = bss;
e21546a2 969 sdata->u.mgd.old_associate_work = wk;
77fdaa12 970 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 971
b291ba11
JB		 972 /* just to be sure */
973 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
974 IEEE80211_STA_BEACON_POLL);
975
0183826b
JB		 976 /*
977 * Always handle WMM once after association regardless
978 * of the first value the AP uses. Setting -1 here has
979 * that effect because the AP values is an unsigned
980 * 4-bit value.
981 */
982 sdata->u.mgd.wmm_last_param_set = -1;
983
9ac19a90 984 ieee80211_led_assoc(local, 1);
9306102e 985
bda3933a 986 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 987 /*
988 * For now just always ask the driver to update the basic rateset
989 * when we have associated, we aren't checking whether it actually
990 * changed or not.
991 */
ae5eb026 992 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 993
994 /* And the BSSID changed - we're associated now */
995 bss_info_changed |= BSS_CHANGED_BSSID;
996
ae5eb026 997 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 998
056508dc
JB		 999 mutex_lock(&local->iflist_mtx);
1000 ieee80211_recalc_ps(local, -1);
0f78231b 1001 ieee80211_recalc_smps(local, sdata);
056508dc 1002 mutex_unlock(&local->iflist_mtx);
e0cb686f 1003
53623f1a 1004 netif_start_queue(sdata->dev);
9ac19a90 1005 netif_carrier_on(sdata->dev);
f0706e82
JB		 1006}
1007
77fdaa12
JB		 1008static enum rx_mgmt_action __must_check
1009ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
1010 struct ieee80211_mgd_work *wk)
f0706e82 1011{
46900298 1012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1013 struct ieee80211_local *local = sdata->local;
46900298 1014
77fdaa12
JB		 1015 wk->tries++;
1016 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1017 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
47846c9b 1018 sdata->name, wk->bss->cbss.bssid);
7a947080
VT		 1019
1020 /*
1021 * Most likely AP is not in the range so remove the
77fdaa12 1022 * bss struct for that AP.
7a947080 1023 */
77fdaa12 1024 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1025
1026 /*
1027 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1028 * due to work needing to be done. Hence, queue the STAs work
1029 * again for that.
11432379 1030 */
42935eca 1031 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1032 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1033 }
f0706e82 1034
77fdaa12 1035 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
47846c9b 1036 sdata->name, wk->bss->cbss.bssid,
77fdaa12 1037 wk->tries);
f0706e82 1038
77fdaa12
JB		 1039 /*
1040 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 1041 * will not answer to direct packet in unassociated state.
1042 */
77fdaa12
JB		 1043 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
1044
1045 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1046 run_again(ifmgd, wk->timeout);
9ac19a90 1047
77fdaa12 1048 return RX_MGMT_NONE;
60f8b39c 1049}
f0706e82 1050
9ac19a90 1051
77fdaa12
JB		 1052static enum rx_mgmt_action __must_check
1053ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
1054 struct ieee80211_mgd_work *wk)
f0706e82 1055{
46900298 1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1057 struct ieee80211_local *local = sdata->local;
46900298 1058
77fdaa12
JB		 1059 wk->tries++;
1060 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 1061 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 1062 " timed out\n",
47846c9b 1063 sdata->name, wk->bss->cbss.bssid);
77fdaa12
JB		 1064
1065 /*
1066 * Most likely AP is not in the range so remove the
1067 * bss struct for that AP.
1068 */
1069 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 1070
1071 /*
1072 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1073 * due to work needing to be done. Hence, queue the STAs work
1074 * again for that.
11432379 1075 */
42935eca 1076 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1077 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1078 }
f0706e82 1079
77fdaa12 1080 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
47846c9b 1081 sdata->name, wk->bss->cbss.bssid, wk->tries);
77fdaa12
JB		 1082
1083 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1084 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1085 wk->auth_transaction = 2;
f0706e82 1086
77fdaa12 1087 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1088 run_again(ifmgd, wk->timeout);
9ac19a90 1089
77fdaa12 1090 return RX_MGMT_NONE;
f0706e82
JB		 1091}
1092
e21546a2
JB		 1093static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1094 bool deauth)
aa458d17 1095{
46900298 1096 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1097 struct ieee80211_local *local = sdata->local;
1098 struct sta_info *sta;
e0cb686f 1099 u32 changed = 0, config_changed = 0;
b291ba11 1100 u8 bssid[ETH_ALEN];
aa458d17 1101
77fdaa12
JB		 1102 ASSERT_MGD_MTX(ifmgd);
1103
b291ba11
JB		 1104 if (WARN_ON(!ifmgd->associated))
1105 return;
1106
1107 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1108
77fdaa12
JB		 1109 ifmgd->associated = NULL;
1110 memset(ifmgd->bssid, 0, ETH_ALEN);
1111
e21546a2
JB		 1112 if (deauth) {
1113 kfree(ifmgd->old_associate_work);
1114 ifmgd->old_associate_work = NULL;
1115 } else {
1116 struct ieee80211_mgd_work *wk = ifmgd->old_associate_work;
1117
1118 wk->state = IEEE80211_MGD_STATE_IDLE;
1119 list_add(&wk->list, &ifmgd->work_list);
1120 }
1121
77fdaa12
JB		 1122 /*
1123 * we need to commit the associated = NULL change because the
1124 * scan code uses that to determine whether this iface should
1125 * go to/wake up from powersave or not -- and could otherwise
1126 * wake the queues erroneously.
1127 */
1128 smp_mb();
1129
1130 /*
1131 * Thus, we can only afterwards stop the queues -- to account
1132 * for the case where another CPU is finishing a scan at this
1133 * time -- we don't want the scan code to enable queues.
1134 */
aa458d17 1135
53623f1a 1136 netif_stop_queue(sdata->dev);
aa458d17
TW		 1137 netif_carrier_off(sdata->dev);
1138
1fa6f4af 1139 rcu_read_lock();
abe60632 1140 sta = sta_info_get(sdata, bssid);
1fa6f4af
JB		 1141 if (sta)
1142 ieee80211_sta_tear_down_BA_sessions(sta);
1143 rcu_read_unlock();
aa458d17 1144
f5e5bf25
TW		 1145 changed |= ieee80211_reset_erp_info(sdata);
1146
f5e5bf25 1147 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1148 changed |= BSS_CHANGED_ASSOC;
1149 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1150
aa837e1d
JB		 1151 ieee80211_set_wmm_default(sdata);
1152
4797938c 1153 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1154 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1155
413ad50a
JB		 1156 /* on the next assoc, re-program HT parameters */
1157 sdata->ht_opmode_valid = false;
1158
a8302de9
VT		 1159 local->power_constr_level = 0;
1160
520eb820
KV		 1161 del_timer_sync(&local->dynamic_ps_timer);
1162 cancel_work_sync(&local->dynamic_ps_enable_work);
1163
e0cb686f
KV		 1164 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1165 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1166 config_changed |= IEEE80211_CONF_CHANGE_PS;
1167 }
ae5eb026 1168
e0cb686f 1169 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1170
1171 /* And the BSSID changed -- not very interesting here */
1172 changed |= BSS_CHANGED_BSSID;
ae5eb026 1173 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1174
1175 rcu_read_lock();
1176
abe60632 1177 sta = sta_info_get(sdata, bssid);
8e268e47
TW		 1178 if (!sta) {
1179 rcu_read_unlock();
1180 return;
1181 }
1182
1183 sta_info_unlink(&sta);
1184
1185 rcu_read_unlock();
1186
1187 sta_info_destroy(sta);
aa458d17 1188}
f0706e82 1189
77fdaa12
JB		 1190static enum rx_mgmt_action __must_check
1191ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1192 struct ieee80211_mgd_work *wk)
f0706e82 1193{
46900298 1194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1195 struct ieee80211_local *local = sdata->local;
46900298 1196
77fdaa12
JB		 1197 wk->tries++;
1198 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1199 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1200 " timed out\n",
47846c9b 1201 sdata->name, wk->bss->cbss.bssid);
77fdaa12
JB		 1202
1203 /*
1204 * Most likely AP is not in the range so remove the
1205 * bss struct for that AP.
1206 */
1207 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1208
11432379
HS		 1209 /*
1210 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1211 * due to work needing to be done. Hence, queue the STAs work
1212 * again for that.
11432379 1213 */
42935eca 1214 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1215 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1216 }
1217
77fdaa12 1218 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
47846c9b 1219 sdata->name, wk->bss->cbss.bssid, wk->tries);
77fdaa12
JB		 1220 ieee80211_send_assoc(sdata, wk);
1221
1222 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1223 run_again(ifmgd, wk->timeout);
f0706e82 1224
77fdaa12 1225 return RX_MGMT_NONE;
f0706e82
JB		 1226}
1227
3cf335d5
KV		 1228void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1229 struct ieee80211_hdr *hdr)
1230{
1231 /*
1232 * We can postpone the mgd.timer whenever receiving unicast frames
1233 * from AP because we know that the connection is working both ways
1234 * at that time. But multicast frames (and hence also beacons) must
1235 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1236 * data idle periods for sending the periodic probe request to the
1237 * AP we're connected to.
3cf335d5 1238 */
b291ba11
JB		 1239 if (is_multicast_ether_addr(hdr->addr1))
1240 return;
1241
1242 mod_timer(&sdata->u.mgd.conn_mon_timer,
1243 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1244}
f0706e82 1245
a43abf29
ML		 1246static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1247{
1248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1249 const u8 *ssid;
1250
1251 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1252 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1253 ssid + 2, ssid[1], NULL, 0);
1254
1255 ifmgd->probe_send_count++;
1256 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1257 run_again(ifmgd, ifmgd->probe_timeout);
1258}
1259
b291ba11
JB		 1260static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1261 bool beacon)
04de8381 1262{
04de8381 1263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1264 bool already = false;
34bfc411 1265
0e2b6286
JB		 1266 if (!netif_running(sdata->dev))
1267 return;
1268
91a3bd76
LR		 1269 if (sdata->local->scanning)
1270 return;
1271
77fdaa12
JB		 1272 mutex_lock(&ifmgd->mtx);
1273
1274 if (!ifmgd->associated)
1275 goto out;
1276
a860402d 1277#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1278 if (beacon && net_ratelimit())
1279 printk(KERN_DEBUG "%s: detected beacon loss from AP "
47846c9b 1280 "- sending probe request\n", sdata->name);
a860402d 1281#endif
04de8381 1282
b291ba11
JB		 1283 /*
1284 * The driver/our work has already reported this event or the
1285 * connection monitoring has kicked in and we have already sent
1286 * a probe request. Or maybe the AP died and the driver keeps
1287 * reporting until we disassociate...
1288 *
1289 * In either case we have to ignore the current call to this
1290 * function (except for setting the correct probe reason bit)
1291 * because otherwise we would reset the timer every time and
1292 * never check whether we received a probe response!
1293 */
1294 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1295 IEEE80211_STA_CONNECTION_POLL))
1296 already = true;
1297
1298 if (beacon)
1299 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1300 else
1301 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1302
1303 if (already)
1304 goto out;
1305
4e751843
JB		 1306 mutex_lock(&sdata->local->iflist_mtx);
1307 ieee80211_recalc_ps(sdata->local, -1);
1308 mutex_unlock(&sdata->local->iflist_mtx);
1309
a43abf29
ML		 1310 ifmgd->probe_send_count = 0;
1311 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1312 out:
1313 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1314}
1315
b291ba11
JB		 1316void ieee80211_beacon_loss_work(struct work_struct *work)
1317{
1318 struct ieee80211_sub_if_data *sdata =
1319 container_of(work, struct ieee80211_sub_if_data,
1320 u.mgd.beacon_loss_work);
1321
1322 ieee80211_mgd_probe_ap(sdata, true);
1323}
1324
04de8381
KV		 1325void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1326{
1327 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1328
42935eca 1329 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1330}
1331EXPORT_SYMBOL(ieee80211_beacon_loss);
1332
77fdaa12
JB		 1333static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1334 struct ieee80211_mgd_work *wk)
f0706e82 1335{
77fdaa12 1336 wk->state = IEEE80211_MGD_STATE_IDLE;
47846c9b 1337 printk(KERN_DEBUG "%s: authenticated\n", sdata->name);
f0706e82
JB		 1338}
1339
1340
f698d856 1341static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1342 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1343 struct ieee80211_mgmt *mgmt,
1344 size_t len)
1345{
1346 u8 *pos;
1347 struct ieee802_11_elems elems;
1348
f0706e82 1349 pos = mgmt->u.auth.variable;
67a4cce4 1350 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1351 if (!elems.challenge)
f0706e82 1352 return;
77fdaa12 1353 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1354 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1355 wk->bss->cbss.bssid,
1356 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1357 wk->auth_transaction = 4;
fe3d2c3f
JB		 1358}
1359
77fdaa12
JB		 1360static enum rx_mgmt_action __must_check
1361ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1362 struct ieee80211_mgd_work *wk,
1363 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1364{
f0706e82
JB		 1365 u16 auth_alg, auth_transaction, status_code;
1366
77fdaa12
JB		 1367 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1368 return RX_MGMT_NONE;
f0706e82 1369
f4ea83dd 1370 if (len < 24 + 6)
77fdaa12 1371 return RX_MGMT_NONE;
f0706e82 1372
77fdaa12
JB		 1373 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1374 return RX_MGMT_NONE;
f0706e82 1375
77fdaa12
JB		 1376 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1377 return RX_MGMT_NONE;
f0706e82
JB		 1378
1379 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1380 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1381 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1382
77fdaa12
JB		 1383 if (auth_alg != wk->auth_alg ||
1384 auth_transaction != wk->auth_transaction)
1385 return RX_MGMT_NONE;
f0706e82
JB		 1386
1387 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1388 list_del(&wk->list);
1389 kfree(wk);
1390 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1391 }
1392
77fdaa12 1393 switch (wk->auth_alg) {
f0706e82
JB		 1394 case WLAN_AUTH_OPEN:
1395 case WLAN_AUTH_LEAP:
636a5d36 1396 case WLAN_AUTH_FT:
77fdaa12
JB		 1397 ieee80211_auth_completed(sdata, wk);
1398 return RX_MGMT_CFG80211_AUTH;
f0706e82 1399 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1400 if (wk->auth_transaction == 4) {
1401 ieee80211_auth_completed(sdata, wk);
1402 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1403 } else
77fdaa12 1404 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1405 break;
1406 }
77fdaa12
JB		 1407
1408 return RX_MGMT_NONE;
f0706e82
JB		 1409}
1410
1411
77fdaa12
JB		 1412static enum rx_mgmt_action __must_check
1413ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1414 struct ieee80211_mgd_work *wk,
1415 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1416{
46900298 1417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1418 const u8 *bssid = NULL;
f0706e82
JB		 1419 u16 reason_code;
1420
f4ea83dd 1421 if (len < 24 + 2)
77fdaa12 1422 return RX_MGMT_NONE;
f0706e82 1423
77fdaa12
JB		 1424 ASSERT_MGD_MTX(ifmgd);
1425
1426 if (wk)
1427 bssid = wk->bss->cbss.bssid;
1428 else
1429 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1430
1431 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1432
77fdaa12 1433 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
47846c9b 1434 sdata->name, bssid, reason_code);
77fdaa12
JB		 1435
1436 if (!wk) {
e21546a2 1437 ieee80211_set_disassoc(sdata, true);
bc83b681 1438 ieee80211_recalc_idle(sdata->local);
77fdaa12
JB		 1439 } else {
1440 list_del(&wk->list);
1441 kfree(wk);
1442 }
f0706e82 1443
77fdaa12 1444 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1445}
1446
1447
77fdaa12
JB		 1448static enum rx_mgmt_action __must_check
1449ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1450 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1451{
46900298 1452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1453 u16 reason_code;
1454
f4ea83dd 1455 if (len < 24 + 2)
77fdaa12 1456 return RX_MGMT_NONE;
f0706e82 1457
77fdaa12
JB		 1458 ASSERT_MGD_MTX(ifmgd);
1459
1460 if (WARN_ON(!ifmgd->associated))
1461 return RX_MGMT_NONE;
1462
1463 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1464 return RX_MGMT_NONE;
f0706e82
JB		 1465
1466 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1467
0ff71613 1468 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
47846c9b 1469 sdata->name, mgmt->sa, reason_code);
f0706e82 1470
e21546a2 1471 ieee80211_set_disassoc(sdata, false);
bc83b681 1472 ieee80211_recalc_idle(sdata->local);
77fdaa12 1473 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1474}
1475
1476
77fdaa12
JB		 1477static enum rx_mgmt_action __must_check
1478ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1479 struct ieee80211_mgd_work *wk,
1480 struct ieee80211_mgmt *mgmt, size_t len,
1481 bool reassoc)
f0706e82 1482{
46900298 1483 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1484 struct ieee80211_local *local = sdata->local;
8318d78a 1485 struct ieee80211_supported_band *sband;
f0706e82 1486 struct sta_info *sta;
881d948c 1487 u32 rates, basic_rates;
f0706e82
JB		 1488 u16 capab_info, status_code, aid;
1489 struct ieee802_11_elems elems;
bda3933a 1490 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1491 u8 *pos;
ae5eb026 1492 u32 changed = 0;
5d1ec85f
JB		 1493 int i, j, err;
1494 bool have_higher_than_11mbit = false;
ae5eb026 1495 u16 ap_ht_cap_flags;
f0706e82 1496
77fdaa12
JB		 1497 /*
1498 * AssocResp and ReassocResp have identical structure, so process both
1499 * of them in this function.
1500 */
f0706e82 1501
f4ea83dd 1502 if (len < 24 + 6)
77fdaa12 1503 return RX_MGMT_NONE;
f0706e82 1504
77fdaa12
JB		 1505 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1506 return RX_MGMT_NONE;
f0706e82
JB		 1507
1508 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1509 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1510 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1511
0c68ae26 1512 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1513 "status=%d aid=%d)\n",
47846c9b 1514 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1515 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1516
63a5ab82
JM		 1517 pos = mgmt->u.assoc_resp.variable;
1518 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1519
1520 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1521 elems.timeout_int && elems.timeout_int_len == 5 &&
1522 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1523 u32 tu, ms;
f797eb7e 1524 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1525 ms = tu * 1024 / 1000;
1526 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1527 "comeback duration %u TU (%u ms)\n",
47846c9b 1528 sdata->name, tu, ms);
77fdaa12 1529 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1530 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1531 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1532 return RX_MGMT_NONE;
63a5ab82
JM		 1533 }
1534
f0706e82
JB		 1535 if (status_code != WLAN_STATUS_SUCCESS) {
1536 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
47846c9b 1537 sdata->name, status_code);
2ef6e444 1538 wk->state = IEEE80211_MGD_STATE_IDLE;
77fdaa12 1539 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1540 }
1541
1dd84aa2
JB		 1542 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1543 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
47846c9b 1544 "set\n", sdata->name, aid);
1dd84aa2
JB		 1545 aid &= ~(BIT(15) | BIT(14));
1546
f0706e82
JB		 1547 if (!elems.supp_rates) {
1548 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
47846c9b 1549 sdata->name);
77fdaa12 1550 return RX_MGMT_NONE;
f0706e82
JB		 1551 }
1552
47846c9b 1553 printk(KERN_DEBUG "%s: associated\n", sdata->name);
46900298 1554 ifmgd->aid = aid;
f0706e82 1555
5d1ec85f 1556 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
f0706e82 1557 if (!sta) {
5d1ec85f
JB		 1558 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1559 " the AP\n", sdata->name);
1560 return RX_MGMT_CFG80211_ASSOC_ERROR;
77fdaa12 1561 }
05e5e883 1562
5d1ec85f
JB		 1563 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1564 WLAN_STA_ASSOC_AP);
1565 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1566 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1567
60f8b39c
JB		 1568 rates = 0;
1569 basic_rates = 0;
1570 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1571
60f8b39c
JB		 1572 for (i = 0; i < elems.supp_rates_len; i++) {
1573 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1574 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1575
60f8b39c
JB		 1576 if (rate > 110)
1577 have_higher_than_11mbit = true;
1578
1579 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1580 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1581 rates |= BIT(j);
d61272cb
TW		 1582 if (is_basic)
1583 basic_rates |= BIT(j);
1584 break;
1585 }
f709fc69 1586 }
f709fc69
LCC		 1587 }
1588
60f8b39c
JB		 1589 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1590 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1591 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1592
60f8b39c
JB		 1593 if (rate > 110)
1594 have_higher_than_11mbit = true;
f0706e82 1595
60f8b39c 1596 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1597 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1598 rates |= BIT(j);
d61272cb
TW		 1599 if (is_basic)
1600 basic_rates |= BIT(j);
1601 break;
1602 }
60f8b39c 1603 }
1ebebea8 1604 }
f0706e82 1605
323ce79a 1606 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1607 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1608
1609 /* cf. IEEE 802.11 9.2.12 */
1610 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1611 have_higher_than_11mbit)
1612 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1613 else
1614 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1615
ab1faead 1616 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1617 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1618 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1619
1620 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1621
4b7679a5 1622 rate_control_rate_init(sta);
f0706e82 1623
46900298 1624 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1625 set_sta_flags(sta, WLAN_STA_MFP);
1626
ddf4ac53 1627 if (elems.wmm_param)
60f8b39c 1628 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53 1629
5d1ec85f
JB		 1630 err = sta_info_insert(sta);
1631 sta = NULL;
1632 if (err) {
1633 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1634 " the AP (error %d)\n", sdata->name, err);
1635 return RX_MGMT_CFG80211_ASSOC_ERROR;
ddf4ac53
JB		 1636 }
1637
ddf4ac53 1638 if (elems.wmm_param)
46900298 1639 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1640 elems.wmm_param_len);
aa837e1d
JB		 1641 else
1642 ieee80211_set_wmm_default(sdata);
f0706e82 1643
ae5eb026 1644 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1645 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1646 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1647 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1648 wk->bss->cbss.bssid,
ae5eb026
JB		 1649 ap_ht_cap_flags);
1650
056508dc
JB		 1651 /* delete work item -- must be before set_associated for PS */
1652 list_del(&wk->list);
1653
60f8b39c
JB		 1654 /* set AID and assoc capability,
1655 * ieee80211_set_associated() will tell the driver */
1656 bss_conf->aid = aid;
1657 bss_conf->assoc_capability = capab_info;
e21546a2
JB		 1658 /* this will take ownership of wk */
1659 ieee80211_set_associated(sdata, wk, changed);
f0706e82 1660
15b7b062 1661 /*
b291ba11
JB		 1662 * Start timer to probe the connection to the AP now.
1663 * Also start the timer that will detect beacon loss.
15b7b062 1664 */
b291ba11
JB		 1665 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1666 mod_beacon_timer(sdata);
15b7b062 1667
77fdaa12 1668 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1669}
1670
1671
98c8fccf
JB		 1672static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1673 struct ieee80211_mgmt *mgmt,
1674 size_t len,
1675 struct ieee80211_rx_status *rx_status,
1676 struct ieee802_11_elems *elems,
1677 bool beacon)
1678{
1679 struct ieee80211_local *local = sdata->local;
1680 int freq;
c2b13452 1681 struct ieee80211_bss *bss;
98c8fccf 1682 struct ieee80211_channel *channel;
98c8fccf
JB		 1683
1684 if (elems->ds_params && elems->ds_params_len == 1)
1685 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1686 else
1687 freq = rx_status->freq;
1688
1689 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1690
1691 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1692 return;
1693
98c8fccf 1694 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1695 channel, beacon);
77fdaa12
JB		 1696 if (bss)
1697 ieee80211_rx_bss_put(local, bss);
1698
1699 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1700 return;
1701
c481ec97 1702 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1703 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1704 ETH_ALEN) == 0)) {
c481ec97
S		 1705 struct ieee80211_channel_sw_ie *sw_elem =
1706 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1707 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1708 }
f0706e82
JB		 1709}
1710
1711
f698d856 1712static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1713 struct ieee80211_mgd_work *wk,
1714 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1715 struct ieee80211_rx_status *rx_status)
1716{
15b7b062 1717 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1718 size_t baselen;
1719 struct ieee802_11_elems elems;
1720
15b7b062
KV		 1721 ifmgd = &sdata->u.mgd;
1722
77fdaa12
JB		 1723 ASSERT_MGD_MTX(ifmgd);
1724
47846c9b 1725 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
8e7cdbb6
TW		 1726 return; /* ignore ProbeResp to foreign address */
1727
ae6a44e3
EK		 1728 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1729 if (baselen > len)
1730 return;
1731
1732 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1733 &elems);
1734
98c8fccf 1735 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1736
1737 /* direct probe may be part of the association flow */
77fdaa12 1738 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
0ff71613 1739 printk(KERN_DEBUG "%s: direct probe responded\n",
47846c9b 1740 sdata->name);
77fdaa12
JB		 1741 wk->tries = 0;
1742 wk->state = IEEE80211_MGD_STATE_AUTH;
1743 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1744 }
15b7b062 1745
77fdaa12
JB		 1746 if (ifmgd->associated &&
1747 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1748 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1749 IEEE80211_STA_CONNECTION_POLL)) {
1750 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1751 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1752 mutex_lock(&sdata->local->iflist_mtx);
1753 ieee80211_recalc_ps(sdata->local, -1);
1754 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1755 /*
1756 * We've received a probe response, but are not sure whether
1757 * we have or will be receiving any beacons or data, so let's
1758 * schedule the timers again, just in case.
1759 */
1760 mod_beacon_timer(sdata);
1761 mod_timer(&ifmgd->conn_mon_timer,
1762 round_jiffies_up(jiffies +
1763 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1764 }
f0706e82
JB		 1765}
1766
d91f36db
JB		 1767/*
1768 * This is the canonical list of information elements we care about,
1769 * the filter code also gives us all changes to the Microsoft OUI
1770 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1771 *
1772 * We implement beacon filtering in software since that means we can
1773 * avoid processing the frame here and in cfg80211, and userspace
1774 * will not be able to tell whether the hardware supports it or not.
1775 *
1776 * XXX: This list needs to be dynamic -- userspace needs to be able to
1777 * add items it requires. It also needs to be able to tell us to
1778 * look out for other vendor IEs.
1779 */
1780static const u64 care_about_ies =
1d4df3a5
JB		 1781 (1ULL << WLAN_EID_COUNTRY) |
1782 (1ULL << WLAN_EID_ERP_INFO) |
1783 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1784 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1785 (1ULL << WLAN_EID_HT_CAPABILITY) |
1786 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1787
f698d856 1788static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1789 struct ieee80211_mgmt *mgmt,
1790 size_t len,
1791 struct ieee80211_rx_status *rx_status)
1792{
d91f36db 1793 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1794 size_t baselen;
1795 struct ieee802_11_elems elems;
f698d856 1796 struct ieee80211_local *local = sdata->local;
471b3efd 1797 u32 changed = 0;
d91f36db 1798 bool erp_valid, directed_tim = false;
7a5158ef 1799 u8 erp_value = 0;
d91f36db 1800 u32 ncrc;
77fdaa12
JB		 1801 u8 *bssid;
1802
1803 ASSERT_MGD_MTX(ifmgd);
f0706e82 1804
ae6a44e3
EK		 1805 /* Process beacon from the current BSS */
1806 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1807 if (baselen > len)
1808 return;
1809
d91f36db 1810 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1811 return;
f0706e82 1812
b291ba11
JB		 1813 /*
1814 * We might have received a number of frames, among them a
1815 * disassoc frame and a beacon...
1816 */
1817 if (!ifmgd->associated)
77fdaa12
JB		 1818 return;
1819
1820 bssid = ifmgd->associated->cbss.bssid;
1821
b291ba11
JB		 1822 /*
1823 * And in theory even frames from a different AP we were just
1824 * associated to a split-second ago!
1825 */
1826 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1827 return;
1828
b291ba11 1829 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1830#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1831 if (net_ratelimit()) {
1832 printk(KERN_DEBUG "%s: cancelling probereq poll due "
47846c9b 1833 "to a received beacon\n", sdata->name);
92778180
JM		 1834 }
1835#endif
b291ba11 1836 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1837 mutex_lock(&local->iflist_mtx);
1838 ieee80211_recalc_ps(local, -1);
1839 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1840 }
1841
b291ba11
JB		 1842 /*
1843 * Push the beacon loss detection into the future since
1844 * we are processing a beacon from the AP just now.
1845 */
1846 mod_beacon_timer(sdata);
1847
d91f36db
JB		 1848 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1849 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1850 len - baselen, &elems,
1851 care_about_ies, ncrc);
1852
1853 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1854 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1855 ifmgd->aid);
d91f36db 1856
30196673
JM		 1857 if (ncrc != ifmgd->beacon_crc) {
1858 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1859 true);
d91f36db 1860
30196673
JM		 1861 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1862 elems.wmm_param_len);
1863 }
fe3fa827 1864
25c9c875 1865 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1866 if (directed_tim) {
572e0012
KV		 1867 if (local->hw.conf.dynamic_ps_timeout > 0) {
1868 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1869 ieee80211_hw_config(local,
1870 IEEE80211_CONF_CHANGE_PS);
1871 ieee80211_send_nullfunc(local, sdata, 0);
1872 } else {
1873 local->pspolling = true;
1874
1875 /*
1876 * Here is assumed that the driver will be
1877 * able to send ps-poll frame and receive a
1878 * response even though power save mode is
1879 * enabled, but some drivers might require
1880 * to disable power save here. This needs
1881 * to be investigated.
1882 */
1883 ieee80211_send_pspoll(local, sdata);
1884 }
a97b77b9
VN		 1885 }
1886 }
7a5158ef 1887
30196673
JM		 1888 if (ncrc == ifmgd->beacon_crc)
1889 return;
1890 ifmgd->beacon_crc = ncrc;
1891
7a5158ef
JB		 1892 if (elems.erp_info && elems.erp_info_len >= 1) {
1893 erp_valid = true;
1894 erp_value = elems.erp_info[0];
1895 } else {
1896 erp_valid = false;
50c4afb9 1897 }
7a5158ef
JB		 1898 changed |= ieee80211_handle_bss_capability(sdata,
1899 le16_to_cpu(mgmt->u.beacon.capab_info),
1900 erp_valid, erp_value);
f0706e82 1901
d3c990fb 1902
53d6f81c 1903 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1904 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1905 struct sta_info *sta;
1906 struct ieee80211_supported_band *sband;
1907 u16 ap_ht_cap_flags;
1908
1909 rcu_read_lock();
1910
abe60632 1911 sta = sta_info_get(sdata, bssid);
77fdaa12 1912 if (WARN_ON(!sta)) {
ae5eb026
JB		 1913 rcu_read_unlock();
1914 return;
1915 }
1916
1917 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1918
1919 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1920 elems.ht_cap_elem, &sta->sta.ht_cap);
1921
1922 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1923
1924 rcu_read_unlock();
1925
1926 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1927 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1928 }
1929
8b19e6ca 1930 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 1931 if (elems.country_elem) {
a8302de9
VT		 1932 /* TODO: IBSS also needs this */
1933 if (elems.pwr_constr_elem)
1934 ieee80211_handle_pwr_constr(sdata,
1935 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1936 elems.pwr_constr_elem,
1937 elems.pwr_constr_elem_len);
3f2355cb
LR		 1938 }
1939
471b3efd 1940 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1941}
1942
46900298 1943ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1944 struct sk_buff *skb)
f0706e82 1945{
f698d856 1946 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1947 struct ieee80211_mgmt *mgmt;
1948 u16 fc;
1949
1950 if (skb->len < 24)
46900298 1951 return RX_DROP_MONITOR;
f0706e82
JB		 1952
1953 mgmt = (struct ieee80211_mgmt *) skb->data;
1954 fc = le16_to_cpu(mgmt->frame_control);
1955
1956 switch (fc & IEEE80211_FCTL_STYPE) {
f0706e82
JB		 1957 case IEEE80211_STYPE_PROBE_RESP:
1958 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1959 case IEEE80211_STYPE_AUTH:
1960 case IEEE80211_STYPE_ASSOC_RESP:
1961 case IEEE80211_STYPE_REASSOC_RESP:
1962 case IEEE80211_STYPE_DEAUTH:
1963 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1964 case IEEE80211_STYPE_ACTION:
46900298 1965 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1966 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1967 return RX_QUEUED;
f0706e82
JB		 1968 }
1969
46900298 1970 return RX_DROP_MONITOR;
f0706e82
JB		 1971}
1972
f698d856 1973static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1974 struct sk_buff *skb)
1975{
77fdaa12 1976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1977 struct ieee80211_rx_status *rx_status;
f0706e82 1978 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1979 struct ieee80211_mgd_work *wk;
1980 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1981 u16 fc;
1982
f0706e82
JB		 1983 rx_status = (struct ieee80211_rx_status *) skb->cb;
1984 mgmt = (struct ieee80211_mgmt *) skb->data;
1985 fc = le16_to_cpu(mgmt->frame_control);
1986
77fdaa12
JB		 1987 mutex_lock(&ifmgd->mtx);
1988
1989 if (ifmgd->associated &&
1990 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1991 ETH_ALEN) == 0) {
1992 switch (fc & IEEE80211_FCTL_STYPE) {
1993 case IEEE80211_STYPE_BEACON:
1994 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1995 rx_status);
1996 break;
1997 case IEEE80211_STYPE_PROBE_RESP:
1998 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1999 skb->len, rx_status);
2000 break;
2001 case IEEE80211_STYPE_DEAUTH:
2002 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
2003 mgmt, skb->len);
2004 break;
2005 case IEEE80211_STYPE_DISASSOC:
2006 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2007 break;
2008 case IEEE80211_STYPE_ACTION:
2009 /* XXX: differentiate, can only happen for CSA now! */
2010 ieee80211_sta_process_chanswitch(sdata,
2011 &mgmt->u.action.u.chan_switch.sw_elem,
2012 ifmgd->associated);
2013 break;
2014 }
2015 mutex_unlock(&ifmgd->mtx);
2016
2017 switch (rma) {
2018 case RX_MGMT_NONE:
2019 /* no action */
2020 break;
2021 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2022 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2023 break;
2024 case RX_MGMT_CFG80211_DISASSOC:
ce470613 2025 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
77fdaa12
JB		 2026 break;
2027 default:
2028 WARN(1, "unexpected: %d", rma);
2029 }
2030 goto out;
2031 }
2032
2033 list_for_each_entry(wk, &ifmgd->work_list, list) {
2034 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
2035 continue;
2036
2037 switch (fc & IEEE80211_FCTL_STYPE) {
2038 case IEEE80211_STYPE_PROBE_RESP:
2039 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
2040 rx_status);
2041 break;
2042 case IEEE80211_STYPE_AUTH:
2043 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
2044 break;
2045 case IEEE80211_STYPE_ASSOC_RESP:
2046 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2047 skb->len, false);
2048 break;
2049 case IEEE80211_STYPE_REASSOC_RESP:
2050 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
2051 skb->len, true);
2052 break;
2053 case IEEE80211_STYPE_DEAUTH:
2054 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
2055 skb->len);
2056 break;
2057 }
2058 /*
2059 * We've processed this frame for that work, so it can't
2060 * belong to another work struct.
2061 * NB: this is also required for correctness because the
2062 * called functions can free 'wk', and for 'rma'!
2063 */
46900298 2064 break;
77fdaa12
JB		 2065 }
2066
2067 mutex_unlock(&ifmgd->mtx);
2068
2069 switch (rma) {
2070 case RX_MGMT_NONE:
2071 /* no action */
46900298 2072 break;
77fdaa12 2073 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2074 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2075 break;
77fdaa12 2076 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2077 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2078 break;
8d8b261a 2079 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2080 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
8d8b261a 2081 break;
5d1ec85f
JB		 2082 case RX_MGMT_CFG80211_ASSOC_ERROR:
2083 /* an internal error -- pretend timeout for now */
2084 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2085 break;
77fdaa12
JB		 2086 default:
2087 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2088 }
2089
77fdaa12 2090 out:
f0706e82
JB		 2091 kfree_skb(skb);
2092}
2093
9c6bd790 2094static void ieee80211_sta_timer(unsigned long data)
f0706e82 2095{
60f8b39c
JB		 2096 struct ieee80211_sub_if_data *sdata =
2097 (struct ieee80211_sub_if_data *) data;
46900298 2098 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2099 struct ieee80211_local *local = sdata->local;
f0706e82 2100
5bb644a0
JB		 2101 if (local->quiescing) {
2102 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2103 return;
2104 }
2105
42935eca 2106 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2107}
2108
9c6bd790
JB		 2109static void ieee80211_sta_work(struct work_struct *work)
2110{
2111 struct ieee80211_sub_if_data *sdata =
46900298 2112 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2113 struct ieee80211_local *local = sdata->local;
46900298 2114 struct ieee80211_if_managed *ifmgd;
9c6bd790 2115 struct sk_buff *skb;
77fdaa12
JB		 2116 struct ieee80211_mgd_work *wk, *tmp;
2117 LIST_HEAD(free_work);
2118 enum rx_mgmt_action rma;
2119 bool anybusy = false;
9c6bd790
JB		 2120
2121 if (!netif_running(sdata->dev))
2122 return;
2123
fbe9c429 2124 if (local->scanning)
9c6bd790
JB		 2125 return;
2126
46900298 2127 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2128 return;
5bb644a0
JB		 2129
2130 /*
42935eca
LR		 2131 * ieee80211_queue_work() should have picked up most cases,
2132 * here we'll pick the the rest.
5bb644a0 2133 */
42935eca
LR		 2134 if (WARN(local->suspended, "STA MLME work scheduled while "
2135 "going to suspend\n"))
5bb644a0
JB		 2136 return;
2137
46900298 2138 ifmgd = &sdata->u.mgd;
f0706e82 2139
77fdaa12 2140 /* first process frames to avoid timing out while a frame is pending */
46900298 2141 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2142 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2143
77fdaa12
JB		 2144 /* then process the rest of the work */
2145 mutex_lock(&ifmgd->mtx);
2146
b291ba11
JB		 2147 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2148 IEEE80211_STA_CONNECTION_POLL) &&
2149 ifmgd->associated) {
a43abf29
ML		 2150 u8 bssid[ETH_ALEN];
2151
2152 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
b291ba11
JB		 2153 if (time_is_after_jiffies(ifmgd->probe_timeout))
2154 run_again(ifmgd, ifmgd->probe_timeout);
a43abf29
ML		 2155
2156 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
2157#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2158 printk(KERN_DEBUG "No probe response from AP %pM"
2159 " after %dms, try %d\n", bssid,
2160 (1000 * IEEE80211_PROBE_WAIT)/HZ,
2161 ifmgd->probe_send_count);
2162#endif
2163 ieee80211_mgd_probe_ap_send(sdata);
2164 } else {
b291ba11
JB		 2165 /*
2166 * We actually lost the connection ... or did we?
2167 * Let's make sure!
2168 */
2169 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2170 IEEE80211_STA_BEACON_POLL);
b291ba11
JB		 2171 printk(KERN_DEBUG "No probe response from AP %pM"
2172 " after %dms, disconnecting.\n",
2173 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
e21546a2 2174 ieee80211_set_disassoc(sdata, true);
bc83b681 2175 ieee80211_recalc_idle(local);
b291ba11
JB		 2176 mutex_unlock(&ifmgd->mtx);
2177 /*
2178 * must be outside lock due to cfg80211,
2179 * but that's not a problem.
2180 */
2181 ieee80211_send_deauth_disassoc(sdata, bssid,
2182 IEEE80211_STYPE_DEAUTH,
2183 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2184 NULL);
2185 mutex_lock(&ifmgd->mtx);
2186 }
2187 }
2188
f0706e82 2189
77fdaa12
JB		 2190 ieee80211_recalc_idle(local);
2191
77fdaa12 2192 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2193 if (time_is_after_jiffies(wk->timeout)) {
2194 /*
2195 * This work item isn't supposed to be worked on
2196 * right now, but take care to adjust the timer
2197 * properly.
2198 */
2199 run_again(ifmgd, wk->timeout);
77fdaa12 2200 continue;
ca386f31 2201 }
5cff20e6 2202
77fdaa12
JB		 2203 switch (wk->state) {
2204 default:
2205 WARN_ON(1);
2206 /* fall through */
2207 case IEEE80211_MGD_STATE_IDLE:
2208 /* nothing */
2209 rma = RX_MGMT_NONE;
2210 break;
2211 case IEEE80211_MGD_STATE_PROBE:
2212 rma = ieee80211_direct_probe(sdata, wk);
2213 break;
2214 case IEEE80211_MGD_STATE_AUTH:
2215 rma = ieee80211_authenticate(sdata, wk);
2216 break;
2217 case IEEE80211_MGD_STATE_ASSOC:
2218 rma = ieee80211_associate(sdata, wk);
2219 break;
2220 }
2221
2222 switch (rma) {
2223 case RX_MGMT_NONE:
2224 /* no action required */
2225 break;
2226 case RX_MGMT_CFG80211_AUTH_TO:
2227 case RX_MGMT_CFG80211_ASSOC_TO:
2228 list_del(&wk->list);
2229 list_add(&wk->list, &free_work);
2230 wk->tries = rma; /* small abuse but only local */
2231 break;
2232 default:
2233 WARN(1, "unexpected: %d", rma);
2234 }
2235 }
2236
5bf6fcc2
JM		 2237 list_for_each_entry(wk, &ifmgd->work_list, list) {
2238 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2239 anybusy = true;
2240 break;
2241 }
2242 }
2243 if (!anybusy &&
2244 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2245 ieee80211_queue_delayed_work(&local->hw,
2246 &local->scan_work,
2247 round_jiffies_relative(0));
2248
77fdaa12
JB		 2249 mutex_unlock(&ifmgd->mtx);
2250
2251 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2252 switch (wk->tries) {
2253 case RX_MGMT_CFG80211_AUTH_TO:
2254 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2255 wk->bss->cbss.bssid);
77fdaa12
JB		 2256 break;
2257 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2258 cfg80211_send_assoc_timeout(sdata->dev,
2259 wk->bss->cbss.bssid);
77fdaa12
JB		 2260 break;
2261 default:
2262 WARN(1, "unexpected: %d", wk->tries);
2263 }
2264
2265 list_del(&wk->list);
2266 kfree(wk);
9c6bd790 2267 }
77fdaa12
JB		 2268
2269 ieee80211_recalc_idle(local);
f0706e82
JB		 2270}
2271
b291ba11
JB		 2272static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2273{
2274 struct ieee80211_sub_if_data *sdata =
2275 (struct ieee80211_sub_if_data *) data;
2276 struct ieee80211_local *local = sdata->local;
2277
2278 if (local->quiescing)
2279 return;
2280
42935eca 2281 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2282}
2283
2284static void ieee80211_sta_conn_mon_timer(unsigned long data)
2285{
2286 struct ieee80211_sub_if_data *sdata =
2287 (struct ieee80211_sub_if_data *) data;
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289 struct ieee80211_local *local = sdata->local;
2290
2291 if (local->quiescing)
2292 return;
2293
42935eca 2294 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2295}
2296
2297static void ieee80211_sta_monitor_work(struct work_struct *work)
2298{
2299 struct ieee80211_sub_if_data *sdata =
2300 container_of(work, struct ieee80211_sub_if_data,
2301 u.mgd.monitor_work);
2302
2303 ieee80211_mgd_probe_ap(sdata, false);
2304}
2305
9c6bd790
JB		 2306static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2307{
ad935687 2308 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2309 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2310 IEEE80211_STA_CONNECTION_POLL);
ad935687 2311
b291ba11 2312 /* let's probe the connection once */
42935eca 2313 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2314 &sdata->u.mgd.monitor_work);
2315 /* and do all the other regular work too */
42935eca 2316 ieee80211_queue_work(&sdata->local->hw,
46900298 2317 &sdata->u.mgd.work);
ad935687 2318 }
9c6bd790 2319}
f0706e82 2320
5bb644a0
JB		 2321#ifdef CONFIG_PM
2322void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2323{
2324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2325
2326 /*
2327 * we need to use atomic bitops for the running bits
2328 * only because both timers might fire at the same
2329 * time -- the code here is properly synchronised.
2330 */
2331
2332 cancel_work_sync(&ifmgd->work);
2333 cancel_work_sync(&ifmgd->beacon_loss_work);
2334 if (del_timer_sync(&ifmgd->timer))
2335 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2336
2337 cancel_work_sync(&ifmgd->chswitch_work);
2338 if (del_timer_sync(&ifmgd->chswitch_timer))
2339 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2340
2341 cancel_work_sync(&ifmgd->monitor_work);
2342 /* these will just be re-established on connection */
2343 del_timer_sync(&ifmgd->conn_mon_timer);
2344 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2345}
2346
2347void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2348{
2349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2350
2351 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2352 add_timer(&ifmgd->timer);
2353 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2354 add_timer(&ifmgd->chswitch_timer);
2355}
2356#endif
2357
9c6bd790
JB		 2358/* interface setup */
2359void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2360{
46900298 2361 struct ieee80211_if_managed *ifmgd;
988c0f72 2362
46900298
JB		 2363 ifmgd = &sdata->u.mgd;
2364 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2365 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2366 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2367 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2368 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2369 (unsigned long) sdata);
b291ba11
JB		 2370 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2371 (unsigned long) sdata);
2372 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2373 (unsigned long) sdata);
46900298 2374 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2375 (unsigned long) sdata);
46900298 2376 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2377
77fdaa12
JB		 2378 INIT_LIST_HEAD(&ifmgd->work_list);
2379
46900298 2380 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2381 ifmgd->flags = 0;
176be728 2382 if (sdata->local->hw.queues >= 4)
46900298 2383 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2384
77fdaa12 2385 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2386
2387 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2388 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2389 else
2390 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2391}
2392
77fdaa12
JB		 2393/* scan finished notification */
2394void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2395{
77fdaa12 2396 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2397
77fdaa12
JB		 2398 /* Restart STA timers */
2399 rcu_read_lock();
2400 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2401 ieee80211_restart_sta_timer(sdata);
2402 rcu_read_unlock();
2403}
60f8b39c 2404
77fdaa12
JB		 2405int ieee80211_max_network_latency(struct notifier_block *nb,
2406 unsigned long data, void *dummy)
2407{
2408 s32 latency_usec = (s32) data;
2409 struct ieee80211_local *local =
2410 container_of(nb, struct ieee80211_local,
2411 network_latency_notifier);
1fa6f4af 2412
77fdaa12
JB		 2413 mutex_lock(&local->iflist_mtx);
2414 ieee80211_recalc_ps(local, latency_usec);
2415 mutex_unlock(&local->iflist_mtx);
dfe67012 2416
77fdaa12 2417 return 0;
9c6bd790
JB		 2418}
2419
77fdaa12
JB		 2420/* config hooks */
2421int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2422 struct cfg80211_auth_request *req)
9c6bd790 2423{
46900298 2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2425 const u8 *ssid;
2426 struct ieee80211_mgd_work *wk;
2427 u16 auth_alg;
9c6bd790 2428
77fdaa12
JB		 2429 switch (req->auth_type) {
2430 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2431 auth_alg = WLAN_AUTH_OPEN;
2432 break;
2433 case NL80211_AUTHTYPE_SHARED_KEY:
2434 auth_alg = WLAN_AUTH_SHARED_KEY;
2435 break;
2436 case NL80211_AUTHTYPE_FT:
2437 auth_alg = WLAN_AUTH_FT;
2438 break;
2439 case NL80211_AUTHTYPE_NETWORK_EAP:
2440 auth_alg = WLAN_AUTH_LEAP;
2441 break;
2442 default:
2443 return -EOPNOTSUPP;
60f8b39c 2444 }
77fdaa12
JB		 2445
2446 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2447 if (!wk)
9c6bd790 2448 return -ENOMEM;
77fdaa12
JB		 2449
2450 wk->bss = (void *)req->bss;
2451
2452 if (req->ie && req->ie_len) {
2453 memcpy(wk->ie, req->ie, req->ie_len);
2454 wk->ie_len = req->ie_len;
9c6bd790 2455 }
77fdaa12 2456
fffd0934
JB		 2457 if (req->key && req->key_len) {
2458 wk->key_len = req->key_len;
2459 wk->key_idx = req->key_idx;
2460 memcpy(wk->key, req->key, req->key_len);
2461 }
2462
77fdaa12
JB		 2463 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2464 memcpy(wk->ssid, ssid + 2, ssid[1]);
2465 wk->ssid_len = ssid[1];
2466
2467 wk->state = IEEE80211_MGD_STATE_PROBE;
2468 wk->auth_alg = auth_alg;
48531847 2469 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2470
2471 /*
2472 * XXX: if still associated need to tell AP that we're going
2473 * to sleep and then change channel etc.
2474 */
2475 sdata->local->oper_channel = req->bss->channel;
2476 ieee80211_hw_config(sdata->local, 0);
2477
2478 mutex_lock(&ifmgd->mtx);
2479 list_add(&wk->list, &sdata->u.mgd.work_list);
2480 mutex_unlock(&ifmgd->mtx);
2481
42935eca 2482 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2483 return 0;
60f8b39c
JB		 2484}
2485
77fdaa12
JB		 2486int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2487 struct cfg80211_assoc_request *req)
f0706e82 2488{
77fdaa12
JB		 2489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2490 struct ieee80211_mgd_work *wk, *found = NULL;
2491 int i, err;
f0706e82 2492
77fdaa12
JB		 2493 mutex_lock(&ifmgd->mtx);
2494
2495 list_for_each_entry(wk, &ifmgd->work_list, list) {
2496 if (&wk->bss->cbss == req->bss &&
2497 wk->state == IEEE80211_MGD_STATE_IDLE) {
2498 found = wk;
2499 break;
2500 }
2501 }
2502
2503 if (!found) {
2504 err = -ENOLINK;
2505 goto out;
2506 }
2507
2508 list_del(&found->list);
2509
2510 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2511 if (!wk) {
2512 list_add(&found->list, &ifmgd->work_list);
2513 err = -ENOMEM;
2514 goto out;
2515 }
2516
2517 list_add(&wk->list, &ifmgd->work_list);
2518
2519 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2520
2521 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2522 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2523 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2524 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2525 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2526
2527 sdata->local->oper_channel = req->bss->channel;
2528 ieee80211_hw_config(sdata->local, 0);
2529
2530 if (req->ie && req->ie_len) {
2531 memcpy(wk->ie, req->ie, req->ie_len);
2532 wk->ie_len = req->ie_len;
2533 } else
2534 wk->ie_len = 0;
2535
2536 if (req->prev_bssid)
2537 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2538
2539 wk->state = IEEE80211_MGD_STATE_ASSOC;
2540 wk->tries = 0;
48531847 2541 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2542
2543 if (req->use_mfp) {
2544 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2545 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2546 } else {
2547 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2548 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2549 }
2550
2551 if (req->crypto.control_port)
2552 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2553 else
2554 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2555
42935eca 2556 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2557
2558 err = 0;
2559
2560 out:
2561 mutex_unlock(&ifmgd->mtx);
2562 return err;
f0706e82
JB		 2563}
2564
77fdaa12 2565int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2566 struct cfg80211_deauth_request *req,
2567 void *cookie)
f0706e82 2568{
46900298 2569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2570 struct ieee80211_mgd_work *wk;
2571 const u8 *bssid = NULL;
a58ce43f 2572 bool not_auth_yet = false;
f0706e82 2573
77fdaa12
JB		 2574 mutex_lock(&ifmgd->mtx);
2575
2576 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2577 bssid = req->bss->bssid;
e21546a2 2578 ieee80211_set_disassoc(sdata, true);
77fdaa12
JB		 2579 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2580 if (&wk->bss->cbss == req->bss) {
2581 bssid = req->bss->bssid;
a58ce43f
JB		 2582 if (wk->state == IEEE80211_MGD_STATE_PROBE)
2583 not_auth_yet = true;
77fdaa12
JB		 2584 list_del(&wk->list);
2585 kfree(wk);
2586 break;
2587 }
2588 }
f0706e82 2589
a58ce43f
JB		 2590 /*
2591 * If somebody requests authentication and we haven't
2592 * sent out an auth frame yet there's no need to send
2593 * out a deauth frame either. If the state was PROBE,
2594 * then this is the case. If it's AUTH we have sent a
2595 * frame, and if it's IDLE we have completed the auth
2596 * process already.
2597 */
2598 if (not_auth_yet) {
2599 mutex_unlock(&ifmgd->mtx);
2600 __cfg80211_auth_canceled(sdata->dev, bssid);
2601 return 0;
2602 }
2603
8d8b261a
JB		 2604 /*
2605 * cfg80211 should catch this ... but it's racy since
2606 * we can receive a deauth frame, process it, hand it
2607 * to cfg80211 while that's in a locked section already
2608 * trying to tell us that the user wants to disconnect.
2609 */
2610 if (!bssid) {
77fdaa12 2611 mutex_unlock(&ifmgd->mtx);
46900298 2612 return -ENOLINK;
77fdaa12
JB		 2613 }
2614
2615 mutex_unlock(&ifmgd->mtx);
2616
0ff71613 2617 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
47846c9b 2618 sdata->name, bssid, req->reason_code);
0ff71613 2619
77fdaa12 2620 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2621 IEEE80211_STYPE_DEAUTH, req->reason_code,
2622 cookie);
f0706e82 2623
bc83b681
JB		 2624 ieee80211_recalc_idle(sdata->local);
2625
f0706e82
JB		 2626 return 0;
2627}
84363e6e 2628
77fdaa12 2629int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2630 struct cfg80211_disassoc_request *req,
2631 void *cookie)
9c6bd790 2632{
77fdaa12 2633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2634
77fdaa12 2635 mutex_lock(&ifmgd->mtx);
10f644a4 2636
8d8b261a
JB		 2637 /*
2638 * cfg80211 should catch this ... but it's racy since
2639 * we can receive a disassoc frame, process it, hand it
2640 * to cfg80211 while that's in a locked section already
2641 * trying to tell us that the user wants to disconnect.
2642 */
2643 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2644 mutex_unlock(&ifmgd->mtx);
2645 return -ENOLINK;
2646 }
2647
0ff71613 2648 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
47846c9b 2649 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 2650
e21546a2 2651 ieee80211_set_disassoc(sdata, false);
77fdaa12
JB		 2652
2653 mutex_unlock(&ifmgd->mtx);
10f644a4 2654
77fdaa12 2655 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2656 IEEE80211_STYPE_DISASSOC, req->reason_code,
2657 cookie);
bc83b681
JB		 2658
2659 ieee80211_recalc_idle(sdata->local);
2660
10f644a4
JB		 2661 return 0;
2662}
Linux kernel - Deliverables
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