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mac80211: fix multi-use timer
[linux-2.6-block.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d0709a65 19#include <linux/rtnetlink.h>
10f644a4 20#include <linux/pm_qos_params.h>
d91f36db 21#include <linux/crc32.h>
f0706e82 22#include <net/mac80211.h>
472dbc45 23#include <asm/unaligned.h>
60f8b39c 24
f0706e82 25#include "ieee80211_i.h"
24487981 26#include "driver-ops.h"
2c8dccc7
JB		 27#include "rate.h"
28#include "led.h"
f0706e82
JB		 29
30#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31#define IEEE80211_AUTH_MAX_TRIES 3
32#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33#define IEEE80211_ASSOC_MAX_TRIES 3
34#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
a971be22 35#define IEEE80211_PROBE_WAIT (HZ / 5)
f0706e82 36
5bb644a0
JB		 37#define TMR_RUNNING_TIMER 0
38#define TMR_RUNNING_CHANSW 1
39
77fdaa12
JB		 40/*
41 * All cfg80211 functions have to be called outside a locked
42 * section so that they can acquire a lock themselves... This
43 * is much simpler than queuing up things in cfg80211, but we
44 * do need some indirection for that here.
45 */
46enum rx_mgmt_action {
47 /* no action required */
48 RX_MGMT_NONE,
49
50 /* caller must call cfg80211_send_rx_auth() */
51 RX_MGMT_CFG80211_AUTH,
52
53 /* caller must call cfg80211_send_rx_assoc() */
54 RX_MGMT_CFG80211_ASSOC,
55
56 /* caller must call cfg80211_send_deauth() */
57 RX_MGMT_CFG80211_DEAUTH,
58
59 /* caller must call cfg80211_send_disassoc() */
60 RX_MGMT_CFG80211_DISASSOC,
61
62 /* caller must call cfg80211_auth_timeout() & free work */
63 RX_MGMT_CFG80211_AUTH_TO,
64
65 /* caller must call cfg80211_assoc_timeout() & free work */
66 RX_MGMT_CFG80211_ASSOC_TO,
67};
68
5484e237 69/* utils */
77fdaa12
JB		 70static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
71{
72 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
73}
74
ca386f31
JB		 75/*
76 * We can have multiple work items (and connection probing)
77 * scheduling this timer, but we need to take care to only
78 * reschedule it when it should fire _earlier_ than it was
79 * asked for before, or if it's not pending right now. This
80 * function ensures that. Note that it then is required to
81 * run this function for all timeouts after the first one
82 * has happened -- the work that runs from this timer will
83 * do that.
84 */
85static void run_again(struct ieee80211_if_managed *ifmgd,
86 unsigned long timeout)
87{
88 ASSERT_MGD_MTX(ifmgd);
89
90 if (!timer_pending(&ifmgd->timer) ||
91 time_before(timeout, ifmgd->timer.expires))
92 mod_timer(&ifmgd->timer, timeout);
93}
94
5484e237 95static int ecw2cw(int ecw)
60f8b39c 96{
5484e237 97 return (1 << ecw) - 1;
60f8b39c
JB		 98}
99
c2b13452 100static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 101 struct ieee80211_supported_band *sband,
881d948c 102 u32 *rates)
9ac19a90
JB		 103{
104 int i, j, count;
105 *rates = 0;
106 count = 0;
107 for (i = 0; i < bss->supp_rates_len; i++) {
108 int rate = (bss->supp_rates[i] & 0x7F) * 5;
109
110 for (j = 0; j < sband->n_bitrates; j++)
111 if (sband->bitrates[j].bitrate == rate) {
112 *rates |= BIT(j);
113 count++;
114 break;
115 }
116 }
117
118 return count;
119}
120
d5522e03
JB		 121/*
122 * ieee80211_enable_ht should be called only after the operating band
123 * has been determined as ht configuration depends on the hw's
124 * HT abilities for a specific band.
125 */
126static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
127 struct ieee80211_ht_info *hti,
77fdaa12 128 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 129{
130 struct ieee80211_local *local = sdata->local;
131 struct ieee80211_supported_band *sband;
d5522e03
JB		 132 struct sta_info *sta;
133 u32 changed = 0;
9ed6bcce 134 u16 ht_opmode;
d5522e03
JB		 135 bool enable_ht = true, ht_changed;
136 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
137
138 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
139
d5522e03
JB		 140 /* HT is not supported */
141 if (!sband->ht_cap.ht_supported)
142 enable_ht = false;
143
144 /* check that channel matches the right operating channel */
145 if (local->hw.conf.channel->center_freq !=
146 ieee80211_channel_to_frequency(hti->control_chan))
147 enable_ht = false;
148
149 if (enable_ht) {
150 channel_type = NL80211_CHAN_HT20;
151
152 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
153 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
154 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
155 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
156 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 157 if (!(local->hw.conf.channel->flags &
158 IEEE80211_CHAN_NO_HT40PLUS))
159 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 160 break;
161 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 162 if (!(local->hw.conf.channel->flags &
163 IEEE80211_CHAN_NO_HT40MINUS))
164 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 165 break;
166 }
167 }
168 }
169
170 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
171 channel_type != local->hw.conf.channel_type;
172
173 local->oper_channel_type = channel_type;
174
175 if (ht_changed) {
176 /* channel_type change automatically detected */
177 ieee80211_hw_config(local, 0);
178
179 rcu_read_lock();
77fdaa12 180 sta = sta_info_get(local, bssid);
d5522e03
JB		 181 if (sta)
182 rate_control_rate_update(local, sband, sta,
183 IEEE80211_RC_HT_CHANGED);
d5522e03 184 rcu_read_unlock();
d5522e03
JB		 185 }
186
187 /* disable HT */
188 if (!enable_ht)
189 return 0;
190
9ed6bcce 191 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 192
193 /* if bss configuration changed store the new one */
413ad50a
JB		 194 if (!sdata->ht_opmode_valid ||
195 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 196 changed |= BSS_CHANGED_HT;
9ed6bcce 197 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 198 sdata->ht_opmode_valid = true;
d5522e03
JB		 199 }
200
201 return changed;
202}
203
9c6bd790
JB		 204/* frame sending functions */
205
77fdaa12
JB		 206static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
207 struct ieee80211_mgd_work *wk)
9ac19a90 208{
46900298 209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 210 struct ieee80211_local *local = sdata->local;
211 struct sk_buff *skb;
212 struct ieee80211_mgmt *mgmt;
517357c6
JB		 213 u8 *pos;
214 const u8 *ies, *ht_ie;
9ac19a90
JB		 215 int i, len, count, rates_len, supp_rates_len;
216 u16 capab;
9ac19a90
JB		 217 int wmm = 0;
218 struct ieee80211_supported_band *sband;
881d948c 219 u32 rates = 0;
9ac19a90
JB		 220
221 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 222 sizeof(*mgmt) + 200 + wk->ie_len +
223 wk->ssid_len);
9ac19a90
JB		 224 if (!skb) {
225 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
226 "frame\n", sdata->dev->name);
227 return;
228 }
229 skb_reserve(skb, local->hw.extra_tx_headroom);
230
231 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
232
46900298 233 capab = ifmgd->capab;
9ac19a90
JB		 234
235 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
236 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
237 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
238 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
239 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
240 }
241
77fdaa12
JB		 242 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
243 capab |= WLAN_CAPABILITY_PRIVACY;
244 if (wk->bss->wmm_used)
245 wmm = 1;
9ac19a90 246
77fdaa12
JB		 247 /* get all rates supported by the device and the AP as
248 * some APs don't like getting a superset of their rates
249 * in the association request (e.g. D-Link DAP 1353 in
250 * b-only mode) */
251 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 252
77fdaa12
JB		 253 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
254 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
255 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 256
257 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
258 memset(mgmt, 0, 24);
77fdaa12 259 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 260 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 261 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 262
77fdaa12 263 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 264 skb_put(skb, 10);
265 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
266 IEEE80211_STYPE_REASSOC_REQ);
267 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
268 mgmt->u.reassoc_req.listen_interval =
269 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 270 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 271 ETH_ALEN);
272 } else {
273 skb_put(skb, 4);
274 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
275 IEEE80211_STYPE_ASSOC_REQ);
276 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 277 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 278 cpu_to_le16(local->hw.conf.listen_interval);
279 }
280
281 /* SSID */
77fdaa12 282 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 283 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 284 *pos++ = wk->ssid_len;
285 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 286
287 /* add all rates which were marked to be used above */
288 supp_rates_len = rates_len;
289 if (supp_rates_len > 8)
290 supp_rates_len = 8;
291
292 len = sband->n_bitrates;
293 pos = skb_put(skb, supp_rates_len + 2);
294 *pos++ = WLAN_EID_SUPP_RATES;
295 *pos++ = supp_rates_len;
296
297 count = 0;
298 for (i = 0; i < sband->n_bitrates; i++) {
299 if (BIT(i) & rates) {
300 int rate = sband->bitrates[i].bitrate;
301 *pos++ = (u8) (rate / 5);
302 if (++count == 8)
303 break;
304 }
305 }
306
307 if (rates_len > count) {
308 pos = skb_put(skb, rates_len - count + 2);
309 *pos++ = WLAN_EID_EXT_SUPP_RATES;
310 *pos++ = rates_len - count;
311
312 for (i++; i < sband->n_bitrates; i++) {
313 if (BIT(i) & rates) {
314 int rate = sband->bitrates[i].bitrate;
315 *pos++ = (u8) (rate / 5);
316 }
317 }
318 }
319
320 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
321 /* 1. power capabilities */
322 pos = skb_put(skb, 4);
323 *pos++ = WLAN_EID_PWR_CAPABILITY;
324 *pos++ = 2;
325 *pos++ = 0; /* min tx power */
326 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
327
328 /* 2. supported channels */
329 /* TODO: get this in reg domain format */
330 pos = skb_put(skb, 2 * sband->n_channels + 2);
331 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
332 *pos++ = 2 * sband->n_channels;
333 for (i = 0; i < sband->n_channels; i++) {
334 *pos++ = ieee80211_frequency_to_channel(
335 sband->channels[i].center_freq);
336 *pos++ = 1; /* one channel in the subband*/
337 }
338 }
339
77fdaa12
JB		 340 if (wk->ie_len && wk->ie) {
341 pos = skb_put(skb, wk->ie_len);
342 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 343 }
344
46900298 345 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 346 pos = skb_put(skb, 9);
347 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
348 *pos++ = 7; /* len */
349 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
350 *pos++ = 0x50;
351 *pos++ = 0xf2;
352 *pos++ = 2; /* WME */
353 *pos++ = 0; /* WME info */
354 *pos++ = 1; /* WME ver */
355 *pos++ = 0;
356 }
357
358 /* wmm support is a must to HT */
eb46936b
VT		 359 /*
360 * IEEE802.11n does not allow TKIP/WEP as pairwise
361 * ciphers in HT mode. We still associate in non-ht
362 * mode (11a/b/g) if any one of these ciphers is
363 * configured as pairwise.
364 */
46900298 365 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 366 sband->ht_cap.ht_supported &&
77fdaa12 367 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 368 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 369 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 370 struct ieee80211_ht_info *ht_info =
371 (struct ieee80211_ht_info *)(ht_ie + 2);
372 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 373 __le16 tmp;
374 u32 flags = local->hw.conf.channel->flags;
375
d9fe60de
JB		 376 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
377 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 378 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 379 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 380 cap &= ~IEEE80211_HT_CAP_SGI_40;
381 }
382 break;
d9fe60de 383 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 384 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 385 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 386 cap &= ~IEEE80211_HT_CAP_SGI_40;
387 }
388 break;
389 }
390
391 tmp = cpu_to_le16(cap);
392 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
393 *pos++ = WLAN_EID_HT_CAPABILITY;
394 *pos++ = sizeof(struct ieee80211_ht_cap);
395 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
396 memcpy(pos, &tmp, sizeof(u16));
397 pos += sizeof(u16);
398 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 399 *pos++ = sband->ht_cap.ampdu_factor |
400 (sband->ht_cap.ampdu_density << 2);
401 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 402 }
403
e50db65c 404 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 405}
406
407
ef422bc0 408static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 409 const u8 *bssid, u16 stype, u16 reason,
410 void *cookie)
9ac19a90
JB		 411{
412 struct ieee80211_local *local = sdata->local;
46900298 413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 414 struct sk_buff *skb;
415 struct ieee80211_mgmt *mgmt;
9aed3cc1 416
65fc73ac 417 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 418 if (!skb) {
ef422bc0
JB		 419 printk(KERN_DEBUG "%s: failed to allocate buffer for "
420 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 421 return;
422 }
423 skb_reserve(skb, local->hw.extra_tx_headroom);
424
425 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
426 memset(mgmt, 0, 24);
77fdaa12 427 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 428 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 429 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 431 skb_put(skb, 2);
ef422bc0 432 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 433 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
434
53b46b84 435 if (stype == IEEE80211_STYPE_DEAUTH)
667503dd 436 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
53b46b84 437 else
667503dd 438 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
46900298 439 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 440}
441
572e0012
KV		 442void ieee80211_send_pspoll(struct ieee80211_local *local,
443 struct ieee80211_sub_if_data *sdata)
444{
46900298 445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 446 struct ieee80211_pspoll *pspoll;
447 struct sk_buff *skb;
448 u16 fc;
449
450 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
451 if (!skb) {
452 printk(KERN_DEBUG "%s: failed to allocate buffer for "
453 "pspoll frame\n", sdata->dev->name);
454 return;
455 }
456 skb_reserve(skb, local->hw.extra_tx_headroom);
457
458 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
459 memset(pspoll, 0, sizeof(*pspoll));
460 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
461 pspoll->frame_control = cpu_to_le16(fc);
46900298 462 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 463
464 /* aid in PS-Poll has its two MSBs each set to 1 */
465 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
466
46900298 467 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 468 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
469
470 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 471}
472
965bedad
JB		 473void ieee80211_send_nullfunc(struct ieee80211_local *local,
474 struct ieee80211_sub_if_data *sdata,
475 int powersave)
476{
477 struct sk_buff *skb;
478 struct ieee80211_hdr *nullfunc;
479 __le16 fc;
480
481 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
482 return;
483
484 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
485 if (!skb) {
486 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
487 "frame\n", sdata->dev->name);
488 return;
489 }
490 skb_reserve(skb, local->hw.extra_tx_headroom);
491
492 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
493 memset(nullfunc, 0, 24);
494 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
495 IEEE80211_FCTL_TODS);
496 if (powersave)
497 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
498 nullfunc->frame_control = fc;
499 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
500 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
501 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
502
503 ieee80211_tx_skb(sdata, skb, 0);
504}
505
cc32abd4
JB		 506/* spectrum management related things */
507static void ieee80211_chswitch_work(struct work_struct *work)
508{
509 struct ieee80211_sub_if_data *sdata =
510 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 511 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
512
513 if (!netif_running(sdata->dev))
514 return;
515
77fdaa12
JB		 516 mutex_lock(&ifmgd->mtx);
517 if (!ifmgd->associated)
518 goto out;
cc32abd4
JB		 519
520 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 521 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
522
cc32abd4 523 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 524 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 525
cc32abd4
JB		 526 ieee80211_wake_queues_by_reason(&sdata->local->hw,
527 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 528 out:
529 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
530 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 531}
532
533static void ieee80211_chswitch_timer(unsigned long data)
534{
535 struct ieee80211_sub_if_data *sdata =
536 (struct ieee80211_sub_if_data *) data;
537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
538
5bb644a0
JB		 539 if (sdata->local->quiescing) {
540 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
541 return;
542 }
543
cc32abd4
JB		 544 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
545}
546
547void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
548 struct ieee80211_channel_sw_ie *sw_elem,
549 struct ieee80211_bss *bss)
550{
551 struct ieee80211_channel *new_ch;
552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
553 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
554
77fdaa12
JB		 555 ASSERT_MGD_MTX(ifmgd);
556
557 if (!ifmgd->associated)
cc32abd4
JB		 558 return;
559
560 if (sdata->local->sw_scanning || sdata->local->hw_scanning)
561 return;
562
563 /* Disregard subsequent beacons if we are already running a timer
564 processing a CSA */
565
566 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
567 return;
568
569 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
570 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
571 return;
572
573 sdata->local->csa_channel = new_ch;
574
575 if (sw_elem->count <= 1) {
576 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
577 } else {
578 ieee80211_stop_queues_by_reason(&sdata->local->hw,
579 IEEE80211_QUEUE_STOP_REASON_CSA);
580 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
581 mod_timer(&ifmgd->chswitch_timer,
582 jiffies +
583 msecs_to_jiffies(sw_elem->count *
584 bss->cbss.beacon_interval));
585 }
586}
587
588static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
589 u16 capab_info, u8 *pwr_constr_elem,
590 u8 pwr_constr_elem_len)
591{
592 struct ieee80211_conf *conf = &sdata->local->hw.conf;
593
594 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
595 return;
596
597 /* Power constraint IE length should be 1 octet */
598 if (pwr_constr_elem_len != 1)
599 return;
600
601 if ((*pwr_constr_elem <= conf->channel->max_power) &&
602 (*pwr_constr_elem != sdata->local->power_constr_level)) {
603 sdata->local->power_constr_level = *pwr_constr_elem;
604 ieee80211_hw_config(sdata->local, 0);
605 }
606}
607
965bedad
JB		 608/* powersave */
609static void ieee80211_enable_ps(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata)
611{
612 struct ieee80211_conf *conf = &local->hw.conf;
613
d5edaedc
JB		 614 /*
615 * If we are scanning right now then the parameters will
616 * take effect when scan finishes.
617 */
618 if (local->hw_scanning || local->sw_scanning)
619 return;
620
965bedad
JB		 621 if (conf->dynamic_ps_timeout > 0 &&
622 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
623 mod_timer(&local->dynamic_ps_timer, jiffies +
624 msecs_to_jiffies(conf->dynamic_ps_timeout));
625 } else {
626 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
627 ieee80211_send_nullfunc(local, sdata, 1);
628 conf->flags |= IEEE80211_CONF_PS;
629 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
630 }
631}
632
633static void ieee80211_change_ps(struct ieee80211_local *local)
634{
635 struct ieee80211_conf *conf = &local->hw.conf;
636
637 if (local->ps_sdata) {
965bedad
JB		 638 ieee80211_enable_ps(local, local->ps_sdata);
639 } else if (conf->flags & IEEE80211_CONF_PS) {
640 conf->flags &= ~IEEE80211_CONF_PS;
641 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
642 del_timer_sync(&local->dynamic_ps_timer);
643 cancel_work_sync(&local->dynamic_ps_enable_work);
644 }
645}
646
647/* need to hold RTNL or interface lock */
10f644a4 648void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 649{
650 struct ieee80211_sub_if_data *sdata, *found = NULL;
651 int count = 0;
652
653 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
654 local->ps_sdata = NULL;
655 return;
656 }
657
658 list_for_each_entry(sdata, &local->interfaces, list) {
659 if (!netif_running(sdata->dev))
660 continue;
661 if (sdata->vif.type != NL80211_IFTYPE_STATION)
662 continue;
663 found = sdata;
664 count++;
665 }
666
43f78531 667 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 668 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
4e751843 669 !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
10f644a4
JB		 670 s32 beaconint_us;
671
672 if (latency < 0)
673 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
674
675 beaconint_us = ieee80211_tu_to_usec(
676 found->vif.bss_conf.beacon_int);
677
04fe2037 678 if (beaconint_us > latency) {
10f644a4 679 local->ps_sdata = NULL;
04fe2037
JB		 680 } else {
681 u8 dtimper = found->vif.bss_conf.dtim_period;
682 int maxslp = 1;
683
684 if (dtimper > 1)
685 maxslp = min_t(int, dtimper,
686 latency / beaconint_us);
687
9ccebe61 688 local->hw.conf.max_sleep_period = maxslp;
10f644a4 689 local->ps_sdata = found;
04fe2037 690 }
10f644a4 691 } else {
965bedad 692 local->ps_sdata = NULL;
10f644a4 693 }
965bedad
JB		 694
695 ieee80211_change_ps(local);
696}
697
698void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
699{
700 struct ieee80211_local *local =
701 container_of(work, struct ieee80211_local,
702 dynamic_ps_disable_work);
703
704 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
705 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
706 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
707 }
708
709 ieee80211_wake_queues_by_reason(&local->hw,
710 IEEE80211_QUEUE_STOP_REASON_PS);
711}
712
713void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
714{
715 struct ieee80211_local *local =
716 container_of(work, struct ieee80211_local,
717 dynamic_ps_enable_work);
718 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
719
720 /* can only happen when PS was just disabled anyway */
721 if (!sdata)
722 return;
723
724 if (local->hw.conf.flags & IEEE80211_CONF_PS)
725 return;
726
727 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
728 ieee80211_send_nullfunc(local, sdata, 1);
729
730 local->hw.conf.flags |= IEEE80211_CONF_PS;
731 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
732}
733
734void ieee80211_dynamic_ps_timer(unsigned long data)
735{
736 struct ieee80211_local *local = (void *) data;
737
5bb644a0
JB		 738 if (local->quiescing)
739 return;
740
965bedad
JB		 741 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
742}
743
60f8b39c 744/* MLME */
f698d856 745static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 746 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 747 u8 *wmm_param, size_t wmm_param_len)
748{
f0706e82
JB		 749 struct ieee80211_tx_queue_params params;
750 size_t left;
751 int count;
752 u8 *pos;
753
46900298 754 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 755 return;
756
757 if (!wmm_param)
758 return;
759
f0706e82
JB		 760 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
761 return;
762 count = wmm_param[6] & 0x0f;
46900298 763 if (count == ifmgd->wmm_last_param_set)
f0706e82 764 return;
46900298 765 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 766
767 pos = wmm_param + 8;
768 left = wmm_param_len - 8;
769
770 memset(&params, 0, sizeof(params));
771
f0706e82
JB		 772 local->wmm_acm = 0;
773 for (; left >= 4; left -= 4, pos += 4) {
774 int aci = (pos[0] >> 5) & 0x03;
775 int acm = (pos[0] >> 4) & 0x01;
776 int queue;
777
778 switch (aci) {
0eeb59fe 779 case 1: /* AC_BK */
e100bb64 780 queue = 3;
988c0f72 781 if (acm)
0eeb59fe 782 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 783 break;
0eeb59fe 784 case 2: /* AC_VI */
e100bb64 785 queue = 1;
988c0f72 786 if (acm)
0eeb59fe 787 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 788 break;
0eeb59fe 789 case 3: /* AC_VO */
e100bb64 790 queue = 0;
988c0f72 791 if (acm)
0eeb59fe 792 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 793 break;
0eeb59fe 794 case 0: /* AC_BE */
f0706e82 795 default:
e100bb64 796 queue = 2;
988c0f72 797 if (acm)
0eeb59fe 798 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 799 break;
800 }
801
802 params.aifs = pos[0] & 0x0f;
803 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
804 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 805 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 806#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 807 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 808 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 809 wiphy_name(local->hw.wiphy), queue, aci, acm,
810 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 811#endif
24487981 812 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 813 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 814 "parameters for queue %d\n",
815 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 816 }
817}
818
7a5158ef
JB		 819static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
820 u16 capab, bool erp_valid, u8 erp)
5628221c 821{
bda3933a 822 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 823 u32 changed = 0;
7a5158ef
JB		 824 bool use_protection;
825 bool use_short_preamble;
826 bool use_short_slot;
827
828 if (erp_valid) {
829 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
830 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
831 } else {
832 use_protection = false;
833 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
834 }
835
836 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 837
471b3efd 838 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 839 bss_conf->use_cts_prot = use_protection;
840 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 841 }
7e9ed188 842
d43c7b37 843 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 844 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 845 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 846 }
d9430a32 847
7a5158ef 848 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 849 bss_conf->use_short_slot = use_short_slot;
850 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 851 }
852
853 return changed;
854}
855
f698d856 856static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
77fdaa12 857 struct ieee80211_bss *bss,
ae5eb026 858 u32 bss_info_changed)
f0706e82 859{
471b3efd 860 struct ieee80211_local *local = sdata->local;
d6f2da5b 861
ae5eb026 862 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 863 /* set timing information */
864 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
865 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
866 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 867
77fdaa12
JB		 868 bss_info_changed |= BSS_CHANGED_BEACON_INT;
869 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
870 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 871
77fdaa12
JB		 872 sdata->u.mgd.associated = bss;
873 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 874
9ac19a90 875 ieee80211_led_assoc(local, 1);
9306102e 876
bda3933a 877 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 878 /*
879 * For now just always ask the driver to update the basic rateset
880 * when we have associated, we aren't checking whether it actually
881 * changed or not.
882 */
ae5eb026 883 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 884
885 /* And the BSSID changed - we're associated now */
886 bss_info_changed |= BSS_CHANGED_BSSID;
887
ae5eb026 888 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 889
965bedad 890 /* will be same as sdata */
04fe2037
JB		 891 if (local->ps_sdata) {
892 mutex_lock(&local->iflist_mtx);
893 ieee80211_recalc_ps(local, -1);
894 mutex_unlock(&local->iflist_mtx);
895 }
e0cb686f 896
9ac19a90
JB		 897 netif_tx_start_all_queues(sdata->dev);
898 netif_carrier_on(sdata->dev);
f0706e82
JB		 899}
900
77fdaa12
JB		 901static enum rx_mgmt_action __must_check
902ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
903 struct ieee80211_mgd_work *wk)
f0706e82 904{
46900298 905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 906 struct ieee80211_local *local = sdata->local;
46900298 907
77fdaa12
JB		 908 wk->tries++;
909 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 910 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 911 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 912
913 /*
914 * Most likely AP is not in the range so remove the
77fdaa12 915 * bss struct for that AP.
7a947080 916 */
77fdaa12 917 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 918
919 /*
920 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 921 * due to work needing to be done. Hence, queue the STAs work
922 * again for that.
11432379
HS		 923 */
924 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 925 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 926 }
f0706e82 927
77fdaa12
JB		 928 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
929 sdata->dev->name, wk->bss->cbss.bssid,
930 wk->tries);
f0706e82 931
77fdaa12
JB		 932 /*
933 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 934 * will not answer to direct packet in unassociated state.
935 */
77fdaa12
JB		 936 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
937
938 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 939 run_again(ifmgd, wk->timeout);
9ac19a90 940
77fdaa12 941 return RX_MGMT_NONE;
60f8b39c 942}
f0706e82 943
9ac19a90 944
77fdaa12
JB		 945static enum rx_mgmt_action __must_check
946ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
947 struct ieee80211_mgd_work *wk)
f0706e82 948{
46900298 949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 950 struct ieee80211_local *local = sdata->local;
46900298 951
77fdaa12
JB		 952 wk->tries++;
953 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 954 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 955 " timed out\n",
77fdaa12
JB		 956 sdata->dev->name, wk->bss->cbss.bssid);
957
958 /*
959 * Most likely AP is not in the range so remove the
960 * bss struct for that AP.
961 */
962 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 963
964 /*
965 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 966 * due to work needing to be done. Hence, queue the STAs work
967 * again for that.
11432379
HS		 968 */
969 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 970 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 971 }
f0706e82 972
77fdaa12
JB		 973 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
974 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
975
976 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 977 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 978 wk->auth_transaction = 2;
f0706e82 979
77fdaa12 980 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 981 run_again(ifmgd, wk->timeout);
9ac19a90 982
77fdaa12 983 return RX_MGMT_NONE;
f0706e82
JB		 984}
985
aa458d17 986static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
77fdaa12 987 const u8 *bssid, bool deauth)
aa458d17 988{
46900298 989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 990 struct ieee80211_local *local = sdata->local;
991 struct sta_info *sta;
e0cb686f 992 u32 changed = 0, config_changed = 0;
aa458d17 993
77fdaa12
JB		 994 ASSERT_MGD_MTX(ifmgd);
995
996 ifmgd->associated = NULL;
997 memset(ifmgd->bssid, 0, ETH_ALEN);
998
999 /*
1000 * we need to commit the associated = NULL change because the
1001 * scan code uses that to determine whether this iface should
1002 * go to/wake up from powersave or not -- and could otherwise
1003 * wake the queues erroneously.
1004 */
1005 smp_mb();
1006
1007 /*
1008 * Thus, we can only afterwards stop the queues -- to account
1009 * for the case where another CPU is finishing a scan at this
1010 * time -- we don't want the scan code to enable queues.
1011 */
aa458d17 1012
24e64622 1013 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1014 netif_carrier_off(sdata->dev);
1015
1fa6f4af 1016 rcu_read_lock();
77fdaa12 1017 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1018 if (sta)
1019 ieee80211_sta_tear_down_BA_sessions(sta);
1020 rcu_read_unlock();
aa458d17 1021
f5e5bf25
TW		 1022 changed |= ieee80211_reset_erp_info(sdata);
1023
f5e5bf25 1024 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1025 changed |= BSS_CHANGED_ASSOC;
1026 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1027
aa837e1d
JB		 1028 ieee80211_set_wmm_default(sdata);
1029
5cff20e6
JB		 1030 ieee80211_recalc_idle(local);
1031
4797938c 1032 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1033 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1034
413ad50a
JB		 1035 /* on the next assoc, re-program HT parameters */
1036 sdata->ht_opmode_valid = false;
1037
a8302de9
VT		 1038 local->power_constr_level = 0;
1039
520eb820
KV		 1040 del_timer_sync(&local->dynamic_ps_timer);
1041 cancel_work_sync(&local->dynamic_ps_enable_work);
1042
e0cb686f
KV		 1043 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1044 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1045 config_changed |= IEEE80211_CONF_CHANGE_PS;
1046 }
ae5eb026 1047
e0cb686f 1048 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1049
1050 /* And the BSSID changed -- not very interesting here */
1051 changed |= BSS_CHANGED_BSSID;
ae5eb026 1052 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1053
1054 rcu_read_lock();
1055
77fdaa12 1056 sta = sta_info_get(local, bssid);
8e268e47
TW		 1057 if (!sta) {
1058 rcu_read_unlock();
1059 return;
1060 }
1061
1062 sta_info_unlink(&sta);
1063
1064 rcu_read_unlock();
1065
1066 sta_info_destroy(sta);
aa458d17 1067}
f0706e82 1068
77fdaa12
JB		 1069static enum rx_mgmt_action __must_check
1070ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1071 struct ieee80211_mgd_work *wk)
f0706e82 1072{
46900298 1073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1074 struct ieee80211_local *local = sdata->local;
46900298 1075
77fdaa12
JB		 1076 wk->tries++;
1077 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1078 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1079 " timed out\n",
77fdaa12
JB		 1080 sdata->dev->name, wk->bss->cbss.bssid);
1081
1082 /*
1083 * Most likely AP is not in the range so remove the
1084 * bss struct for that AP.
1085 */
1086 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1087
11432379
HS		 1088 /*
1089 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1090 * due to work needing to be done. Hence, queue the STAs work
1091 * again for that.
11432379
HS		 1092 */
1093 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 1094 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1095 }
1096
77fdaa12
JB		 1097 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1098 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1099 ieee80211_send_assoc(sdata, wk);
1100
1101 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1102 run_again(ifmgd, wk->timeout);
f0706e82 1103
77fdaa12 1104 return RX_MGMT_NONE;
f0706e82
JB		 1105}
1106
3cf335d5
KV		 1107void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1108 struct ieee80211_hdr *hdr)
1109{
1110 /*
1111 * We can postpone the mgd.timer whenever receiving unicast frames
1112 * from AP because we know that the connection is working both ways
1113 * at that time. But multicast frames (and hence also beacons) must
1114 * be ignored here, because we need to trigger the timer during
1115 * data idle periods for sending the periodical probe request to
1116 * the AP.
1117 */
1118 if (!is_multicast_ether_addr(hdr->addr1))
1119 mod_timer(&sdata->u.mgd.timer,
1120 jiffies + IEEE80211_MONITORING_INTERVAL);
1121}
f0706e82 1122
04de8381
KV		 1123void ieee80211_beacon_loss_work(struct work_struct *work)
1124{
1125 struct ieee80211_sub_if_data *sdata =
1126 container_of(work, struct ieee80211_sub_if_data,
1127 u.mgd.beacon_loss_work);
1128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1129 const u8 *ssid;
04de8381 1130
34bfc411
JB		 1131 /*
1132 * The driver has already reported this event and we have
1133 * already sent a probe request. Maybe the AP died and the
1134 * driver keeps reporting until we disassociate... We have
1135 * to ignore that because otherwise we would continually
1136 * reset the timer and never check whether we received a
1137 * probe response!
1138 */
1139 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
1140 return;
1141
77fdaa12
JB		 1142 mutex_lock(&ifmgd->mtx);
1143
1144 if (!ifmgd->associated)
1145 goto out;
1146
a860402d 1147#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
77fdaa12
JB		 1148 if (net_ratelimit())
1149 printk(KERN_DEBUG "%s: driver reports beacon loss from AP "
1150 "- sending probe request\n", sdata->dev->name);
a860402d 1151#endif
04de8381
KV		 1152
1153 ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1154
1155 mutex_lock(&sdata->local->iflist_mtx);
1156 ieee80211_recalc_ps(sdata->local, -1);
1157 mutex_unlock(&sdata->local->iflist_mtx);
1158
77fdaa12
JB		 1159 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1160 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1161 ssid + 2, ssid[1], NULL, 0);
04de8381 1162
ca386f31 1163 run_again(ifmgd, jiffies + IEEE80211_PROBE_WAIT);
77fdaa12
JB		 1164 out:
1165 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1166}
1167
1168void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1169{
1170 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1171
1172 queue_work(sdata->local->hw.workqueue,
1173 &sdata->u.mgd.beacon_loss_work);
1174}
1175EXPORT_SYMBOL(ieee80211_beacon_loss);
1176
77fdaa12
JB		 1177static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1178 struct ieee80211_mgd_work *wk)
f0706e82 1179{
77fdaa12 1180 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1181 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1182}
1183
1184
f698d856 1185static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1186 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1187 struct ieee80211_mgmt *mgmt,
1188 size_t len)
1189{
1190 u8 *pos;
1191 struct ieee802_11_elems elems;
1192
f0706e82 1193 pos = mgmt->u.auth.variable;
67a4cce4 1194 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1195 if (!elems.challenge)
f0706e82 1196 return;
77fdaa12 1197 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1198 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1199 wk->bss->cbss.bssid,
1200 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1201 wk->auth_transaction = 4;
fe3d2c3f
JB		 1202}
1203
77fdaa12
JB		 1204static enum rx_mgmt_action __must_check
1205ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1206 struct ieee80211_mgd_work *wk,
1207 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1208{
f0706e82
JB		 1209 u16 auth_alg, auth_transaction, status_code;
1210
77fdaa12
JB		 1211 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1212 return RX_MGMT_NONE;
f0706e82 1213
f4ea83dd 1214 if (len < 24 + 6)
77fdaa12 1215 return RX_MGMT_NONE;
f0706e82 1216
77fdaa12
JB		 1217 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1218 return RX_MGMT_NONE;
f0706e82 1219
77fdaa12
JB		 1220 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1221 return RX_MGMT_NONE;
f0706e82
JB		 1222
1223 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1224 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1225 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1226
77fdaa12
JB		 1227 if (auth_alg != wk->auth_alg ||
1228 auth_transaction != wk->auth_transaction)
1229 return RX_MGMT_NONE;
f0706e82
JB		 1230
1231 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1232 list_del(&wk->list);
1233 kfree(wk);
1234 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1235 }
1236
77fdaa12 1237 switch (wk->auth_alg) {
f0706e82
JB		 1238 case WLAN_AUTH_OPEN:
1239 case WLAN_AUTH_LEAP:
636a5d36 1240 case WLAN_AUTH_FT:
77fdaa12
JB		 1241 ieee80211_auth_completed(sdata, wk);
1242 return RX_MGMT_CFG80211_AUTH;
f0706e82 1243 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1244 if (wk->auth_transaction == 4) {
1245 ieee80211_auth_completed(sdata, wk);
1246 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1247 } else
77fdaa12 1248 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1249 break;
1250 }
77fdaa12
JB		 1251
1252 return RX_MGMT_NONE;
f0706e82
JB		 1253}
1254
1255
77fdaa12
JB		 1256static enum rx_mgmt_action __must_check
1257ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1258 struct ieee80211_mgd_work *wk,
1259 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1260{
46900298 1261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1262 const u8 *bssid = NULL;
f0706e82
JB		 1263 u16 reason_code;
1264
f4ea83dd 1265 if (len < 24 + 2)
77fdaa12 1266 return RX_MGMT_NONE;
f0706e82 1267
77fdaa12
JB		 1268 ASSERT_MGD_MTX(ifmgd);
1269
1270 if (wk)
1271 bssid = wk->bss->cbss.bssid;
1272 else
1273 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1274
1275 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1276
77fdaa12
JB		 1277 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1278 sdata->dev->name, bssid, reason_code);
1279
1280 if (!wk) {
1281 ieee80211_set_disassoc(sdata, bssid, true);
1282 } else {
1283 list_del(&wk->list);
1284 kfree(wk);
1285 }
f0706e82 1286
77fdaa12 1287 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1288}
1289
1290
77fdaa12
JB		 1291static enum rx_mgmt_action __must_check
1292ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1293 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1294{
46900298 1295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1296 u16 reason_code;
1297
f4ea83dd 1298 if (len < 24 + 2)
77fdaa12 1299 return RX_MGMT_NONE;
f0706e82 1300
77fdaa12
JB		 1301 ASSERT_MGD_MTX(ifmgd);
1302
1303 if (WARN_ON(!ifmgd->associated))
1304 return RX_MGMT_NONE;
1305
1306 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1307 return RX_MGMT_NONE;
f0706e82
JB		 1308
1309 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1310
77fdaa12
JB		 1311 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1312 sdata->dev->name, reason_code);
f0706e82 1313
77fdaa12
JB		 1314 ieee80211_set_disassoc(sdata, ifmgd->associated->cbss.bssid, false);
1315 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1316}
1317
1318
77fdaa12
JB		 1319static enum rx_mgmt_action __must_check
1320ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1321 struct ieee80211_mgd_work *wk,
1322 struct ieee80211_mgmt *mgmt, size_t len,
1323 bool reassoc)
f0706e82 1324{
46900298 1325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1326 struct ieee80211_local *local = sdata->local;
8318d78a 1327 struct ieee80211_supported_band *sband;
f0706e82 1328 struct sta_info *sta;
881d948c 1329 u32 rates, basic_rates;
f0706e82
JB		 1330 u16 capab_info, status_code, aid;
1331 struct ieee802_11_elems elems;
bda3933a 1332 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1333 u8 *pos;
ae5eb026 1334 u32 changed = 0;
f0706e82 1335 int i, j;
ddf4ac53 1336 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1337 u16 ap_ht_cap_flags;
f0706e82 1338
77fdaa12
JB		 1339 /*
1340 * AssocResp and ReassocResp have identical structure, so process both
1341 * of them in this function.
1342 */
f0706e82 1343
f4ea83dd 1344 if (len < 24 + 6)
77fdaa12 1345 return RX_MGMT_NONE;
f0706e82 1346
77fdaa12
JB		 1347 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1348 return RX_MGMT_NONE;
f0706e82
JB		 1349
1350 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1351 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1352 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1353
0c68ae26 1354 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1355 "status=%d aid=%d)\n",
0c68ae26 1356 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1357 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1358
63a5ab82
JM		 1359 pos = mgmt->u.assoc_resp.variable;
1360 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1361
1362 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1363 elems.timeout_int && elems.timeout_int_len == 5 &&
1364 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1365 u32 tu, ms;
f797eb7e 1366 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1367 ms = tu * 1024 / 1000;
1368 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1369 "comeback duration %u TU (%u ms)\n",
1370 sdata->dev->name, tu, ms);
77fdaa12 1371 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1372 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1373 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1374 return RX_MGMT_NONE;
63a5ab82
JM		 1375 }
1376
f0706e82
JB		 1377 if (status_code != WLAN_STATUS_SUCCESS) {
1378 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1379 sdata->dev->name, status_code);
77fdaa12
JB		 1380 list_del(&wk->list);
1381 kfree(wk);
1382 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1383 }
1384
1dd84aa2
JB		 1385 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1386 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1387 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1388 aid &= ~(BIT(15) | BIT(14));
1389
f0706e82
JB		 1390 if (!elems.supp_rates) {
1391 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1392 sdata->dev->name);
77fdaa12 1393 return RX_MGMT_NONE;
f0706e82
JB		 1394 }
1395
f698d856 1396 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1397 ifmgd->aid = aid;
f0706e82 1398
d0709a65
JB		 1399 rcu_read_lock();
1400
f0706e82 1401 /* Add STA entry for the AP */
77fdaa12 1402 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1403 if (!sta) {
ddf4ac53 1404 newsta = true;
d0709a65 1405
77fdaa12
JB		 1406 rcu_read_unlock();
1407
1408 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1409 if (!sta) {
1410 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1411 " the AP\n", sdata->dev->name);
77fdaa12 1412 return RX_MGMT_NONE;
f0706e82 1413 }
f709fc69 1414
60f8b39c
JB		 1415 /* update new sta with its last rx activity */
1416 sta->last_rx = jiffies;
f709fc69 1417
77fdaa12
JB		 1418 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1419 WLAN_STA_ASSOC_AP);
1420 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1421 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1422
77fdaa12
JB		 1423 rcu_read_lock();
1424 }
05e5e883 1425
60f8b39c
JB		 1426 rates = 0;
1427 basic_rates = 0;
1428 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1429
60f8b39c
JB		 1430 for (i = 0; i < elems.supp_rates_len; i++) {
1431 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1432 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1433
60f8b39c
JB		 1434 if (rate > 110)
1435 have_higher_than_11mbit = true;
1436
1437 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1438 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1439 rates |= BIT(j);
d61272cb
TW		 1440 if (is_basic)
1441 basic_rates |= BIT(j);
1442 break;
1443 }
f709fc69 1444 }
f709fc69
LCC		 1445 }
1446
60f8b39c
JB		 1447 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1448 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1449 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1450
60f8b39c
JB		 1451 if (rate > 110)
1452 have_higher_than_11mbit = true;
f0706e82 1453
60f8b39c 1454 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1455 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1456 rates |= BIT(j);
d61272cb
TW		 1457 if (is_basic)
1458 basic_rates |= BIT(j);
1459 break;
1460 }
60f8b39c 1461 }
1ebebea8 1462 }
f0706e82 1463
323ce79a 1464 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1465 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1466
1467 /* cf. IEEE 802.11 9.2.12 */
1468 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1469 have_higher_than_11mbit)
1470 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1471 else
1472 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1473
ab1faead 1474 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1475 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1476 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1477
1478 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1479
4b7679a5 1480 rate_control_rate_init(sta);
f0706e82 1481
46900298 1482 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1483 set_sta_flags(sta, WLAN_STA_MFP);
1484
ddf4ac53 1485 if (elems.wmm_param)
60f8b39c 1486 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1487
1488 if (newsta) {
1489 int err = sta_info_insert(sta);
1490 if (err) {
1491 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1492 " the AP (error %d)\n", sdata->dev->name, err);
1493 rcu_read_unlock();
77fdaa12 1494 return RX_MGMT_NONE;
ddf4ac53
JB		 1495 }
1496 }
1497
1498 rcu_read_unlock();
1499
1500 if (elems.wmm_param)
46900298 1501 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1502 elems.wmm_param_len);
aa837e1d
JB		 1503 else
1504 ieee80211_set_wmm_default(sdata);
f0706e82 1505
ae5eb026 1506 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1507 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1508 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1509 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1510 wk->bss->cbss.bssid,
ae5eb026
JB		 1511 ap_ht_cap_flags);
1512
60f8b39c
JB		 1513 /* set AID and assoc capability,
1514 * ieee80211_set_associated() will tell the driver */
1515 bss_conf->aid = aid;
1516 bss_conf->assoc_capability = capab_info;
77fdaa12 1517 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1518
15b7b062
KV		 1519 /*
1520 * initialise the time of last beacon to be the association time,
1521 * otherwise beacon loss check will trigger immediately
1522 */
1523 ifmgd->last_beacon = jiffies;
1524
77fdaa12
JB		 1525 list_del(&wk->list);
1526 kfree(wk);
1527 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1528}
1529
1530
98c8fccf
JB		 1531static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1532 struct ieee80211_mgmt *mgmt,
1533 size_t len,
1534 struct ieee80211_rx_status *rx_status,
1535 struct ieee802_11_elems *elems,
1536 bool beacon)
1537{
1538 struct ieee80211_local *local = sdata->local;
1539 int freq;
c2b13452 1540 struct ieee80211_bss *bss;
98c8fccf 1541 struct ieee80211_channel *channel;
98c8fccf
JB		 1542
1543 if (elems->ds_params && elems->ds_params_len == 1)
1544 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1545 else
1546 freq = rx_status->freq;
1547
1548 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1549
1550 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1551 return;
1552
98c8fccf 1553 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1554 channel, beacon);
77fdaa12
JB		 1555 if (bss)
1556 ieee80211_rx_bss_put(local, bss);
1557
1558 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1559 return;
1560
c481ec97 1561 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1562 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1563 ETH_ALEN) == 0)) {
c481ec97
S		 1564 struct ieee80211_channel_sw_ie *sw_elem =
1565 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1566 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1567 }
f0706e82
JB		 1568}
1569
1570
f698d856 1571static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1572 struct ieee80211_mgd_work *wk,
1573 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1574 struct ieee80211_rx_status *rx_status)
1575{
15b7b062 1576 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1577 size_t baselen;
1578 struct ieee802_11_elems elems;
1579
15b7b062
KV		 1580 ifmgd = &sdata->u.mgd;
1581
77fdaa12
JB		 1582 ASSERT_MGD_MTX(ifmgd);
1583
8e7cdbb6
TW		 1584 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1585 return; /* ignore ProbeResp to foreign address */
1586
ae6a44e3
EK		 1587 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1588 if (baselen > len)
1589 return;
1590
1591 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1592 &elems);
1593
98c8fccf 1594 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1595
1596 /* direct probe may be part of the association flow */
77fdaa12 1597 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1598 printk(KERN_DEBUG "%s direct probe responded\n",
1599 sdata->dev->name);
77fdaa12
JB		 1600 wk->tries = 0;
1601 wk->state = IEEE80211_MGD_STATE_AUTH;
1602 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1603 }
15b7b062 1604
77fdaa12
JB		 1605 if (ifmgd->associated &&
1606 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
1607 ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
15b7b062 1608 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1609 mutex_lock(&sdata->local->iflist_mtx);
1610 ieee80211_recalc_ps(sdata->local, -1);
1611 mutex_unlock(&sdata->local->iflist_mtx);
1612 }
f0706e82
JB		 1613}
1614
d91f36db
JB		 1615/*
1616 * This is the canonical list of information elements we care about,
1617 * the filter code also gives us all changes to the Microsoft OUI
1618 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1619 *
1620 * We implement beacon filtering in software since that means we can
1621 * avoid processing the frame here and in cfg80211, and userspace
1622 * will not be able to tell whether the hardware supports it or not.
1623 *
1624 * XXX: This list needs to be dynamic -- userspace needs to be able to
1625 * add items it requires. It also needs to be able to tell us to
1626 * look out for other vendor IEs.
1627 */
1628static const u64 care_about_ies =
1d4df3a5
JB		 1629 (1ULL << WLAN_EID_COUNTRY) |
1630 (1ULL << WLAN_EID_ERP_INFO) |
1631 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1632 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1633 (1ULL << WLAN_EID_HT_CAPABILITY) |
1634 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1635
f698d856 1636static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1637 struct ieee80211_mgmt *mgmt,
1638 size_t len,
1639 struct ieee80211_rx_status *rx_status)
1640{
d91f36db 1641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1642 size_t baselen;
1643 struct ieee802_11_elems elems;
f698d856 1644 struct ieee80211_local *local = sdata->local;
471b3efd 1645 u32 changed = 0;
d91f36db 1646 bool erp_valid, directed_tim = false;
7a5158ef 1647 u8 erp_value = 0;
d91f36db 1648 u32 ncrc;
77fdaa12
JB		 1649 u8 *bssid;
1650
1651 ASSERT_MGD_MTX(ifmgd);
f0706e82 1652
ae6a44e3
EK		 1653 /* Process beacon from the current BSS */
1654 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1655 if (baselen > len)
1656 return;
1657
d91f36db 1658 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1659 return;
f0706e82 1660
77fdaa12
JB		 1661 if (WARN_ON(!ifmgd->associated))
1662 return;
1663
1664 bssid = ifmgd->associated->cbss.bssid;
1665
1666 if (WARN_ON(memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0))
f0706e82
JB		 1667 return;
1668
92778180
JM		 1669 if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
1670#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1671 if (net_ratelimit()) {
1672 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1673 "to a received beacon\n", sdata->dev->name);
1674 }
1675#endif
1676 ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
4e751843
JB		 1677 mutex_lock(&local->iflist_mtx);
1678 ieee80211_recalc_ps(local, -1);
1679 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1680 }
1681
d91f36db
JB		 1682 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1683 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1684 len - baselen, &elems,
1685 care_about_ies, ncrc);
1686
1687 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1688 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1689 ifmgd->aid);
d91f36db 1690
30196673
JM		 1691 if (ncrc != ifmgd->beacon_crc) {
1692 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1693 true);
d91f36db 1694
30196673
JM		 1695 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1696 elems.wmm_param_len);
1697 }
fe3fa827 1698
25c9c875 1699 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1700 if (directed_tim) {
572e0012
KV		 1701 if (local->hw.conf.dynamic_ps_timeout > 0) {
1702 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1703 ieee80211_hw_config(local,
1704 IEEE80211_CONF_CHANGE_PS);
1705 ieee80211_send_nullfunc(local, sdata, 0);
1706 } else {
1707 local->pspolling = true;
1708
1709 /*
1710 * Here is assumed that the driver will be
1711 * able to send ps-poll frame and receive a
1712 * response even though power save mode is
1713 * enabled, but some drivers might require
1714 * to disable power save here. This needs
1715 * to be investigated.
1716 */
1717 ieee80211_send_pspoll(local, sdata);
1718 }
a97b77b9
VN		 1719 }
1720 }
7a5158ef 1721
30196673
JM		 1722 if (ncrc == ifmgd->beacon_crc)
1723 return;
1724 ifmgd->beacon_crc = ncrc;
1725
7a5158ef
JB		 1726 if (elems.erp_info && elems.erp_info_len >= 1) {
1727 erp_valid = true;
1728 erp_value = elems.erp_info[0];
1729 } else {
1730 erp_valid = false;
50c4afb9 1731 }
7a5158ef
JB		 1732 changed |= ieee80211_handle_bss_capability(sdata,
1733 le16_to_cpu(mgmt->u.beacon.capab_info),
1734 erp_valid, erp_value);
f0706e82 1735
d3c990fb 1736
53d6f81c 1737 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1738 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1739 struct sta_info *sta;
1740 struct ieee80211_supported_band *sband;
1741 u16 ap_ht_cap_flags;
1742
1743 rcu_read_lock();
1744
77fdaa12
JB		 1745 sta = sta_info_get(local, bssid);
1746 if (WARN_ON(!sta)) {
ae5eb026
JB		 1747 rcu_read_unlock();
1748 return;
1749 }
1750
1751 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1752
1753 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1754 elems.ht_cap_elem, &sta->sta.ht_cap);
1755
1756 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1757
1758 rcu_read_unlock();
1759
1760 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1761 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1762 }
1763
3f2355cb
LR		 1764 if (elems.country_elem) {
1765 /* Note we are only reviewing this on beacons
1766 * for the BSSID we are associated to */
1767 regulatory_hint_11d(local->hw.wiphy,
1768 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1769
1770 /* TODO: IBSS also needs this */
1771 if (elems.pwr_constr_elem)
1772 ieee80211_handle_pwr_constr(sdata,
1773 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1774 elems.pwr_constr_elem,
1775 elems.pwr_constr_elem_len);
3f2355cb
LR		 1776 }
1777
471b3efd 1778 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1779}
1780
46900298 1781ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1782 struct sk_buff *skb)
f0706e82 1783{
f698d856 1784 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1785 struct ieee80211_mgmt *mgmt;
1786 u16 fc;
1787
1788 if (skb->len < 24)
46900298 1789 return RX_DROP_MONITOR;
f0706e82
JB		 1790
1791 mgmt = (struct ieee80211_mgmt *) skb->data;
1792 fc = le16_to_cpu(mgmt->frame_control);
1793
1794 switch (fc & IEEE80211_FCTL_STYPE) {
1795 case IEEE80211_STYPE_PROBE_REQ:
1796 case IEEE80211_STYPE_PROBE_RESP:
1797 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1798 case IEEE80211_STYPE_AUTH:
1799 case IEEE80211_STYPE_ASSOC_RESP:
1800 case IEEE80211_STYPE_REASSOC_RESP:
1801 case IEEE80211_STYPE_DEAUTH:
1802 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1803 case IEEE80211_STYPE_ACTION:
46900298
JB		 1804 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1805 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1806 return RX_QUEUED;
f0706e82
JB		 1807 }
1808
46900298 1809 return RX_DROP_MONITOR;
f0706e82
JB		 1810}
1811
f698d856 1812static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1813 struct sk_buff *skb)
1814{
77fdaa12 1815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1816 struct ieee80211_rx_status *rx_status;
f0706e82 1817 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1818 struct ieee80211_mgd_work *wk;
1819 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1820 u16 fc;
1821
f0706e82
JB		 1822 rx_status = (struct ieee80211_rx_status *) skb->cb;
1823 mgmt = (struct ieee80211_mgmt *) skb->data;
1824 fc = le16_to_cpu(mgmt->frame_control);
1825
77fdaa12
JB		 1826 mutex_lock(&ifmgd->mtx);
1827
1828 if (ifmgd->associated &&
1829 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1830 ETH_ALEN) == 0) {
1831 switch (fc & IEEE80211_FCTL_STYPE) {
1832 case IEEE80211_STYPE_BEACON:
1833 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1834 rx_status);
1835 break;
1836 case IEEE80211_STYPE_PROBE_RESP:
1837 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1838 skb->len, rx_status);
1839 break;
1840 case IEEE80211_STYPE_DEAUTH:
1841 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1842 mgmt, skb->len);
1843 break;
1844 case IEEE80211_STYPE_DISASSOC:
1845 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1846 break;
1847 case IEEE80211_STYPE_ACTION:
1848 /* XXX: differentiate, can only happen for CSA now! */
1849 ieee80211_sta_process_chanswitch(sdata,
1850 &mgmt->u.action.u.chan_switch.sw_elem,
1851 ifmgd->associated);
1852 break;
1853 }
1854 mutex_unlock(&ifmgd->mtx);
1855
1856 switch (rma) {
1857 case RX_MGMT_NONE:
1858 /* no action */
1859 break;
1860 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1861 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1862 NULL);
77fdaa12
JB		 1863 break;
1864 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1865 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1866 NULL);
77fdaa12
JB		 1867 break;
1868 default:
1869 WARN(1, "unexpected: %d", rma);
1870 }
1871 goto out;
1872 }
1873
1874 list_for_each_entry(wk, &ifmgd->work_list, list) {
1875 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1876 continue;
1877
1878 switch (fc & IEEE80211_FCTL_STYPE) {
1879 case IEEE80211_STYPE_PROBE_RESP:
1880 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1881 rx_status);
1882 break;
1883 case IEEE80211_STYPE_AUTH:
1884 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1885 break;
1886 case IEEE80211_STYPE_ASSOC_RESP:
1887 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1888 skb->len, false);
1889 break;
1890 case IEEE80211_STYPE_REASSOC_RESP:
1891 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1892 skb->len, true);
1893 break;
1894 case IEEE80211_STYPE_DEAUTH:
1895 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1896 skb->len);
1897 break;
1898 }
1899 /*
1900 * We've processed this frame for that work, so it can't
1901 * belong to another work struct.
1902 * NB: this is also required for correctness because the
1903 * called functions can free 'wk', and for 'rma'!
1904 */
46900298 1905 break;
77fdaa12
JB		 1906 }
1907
1908 mutex_unlock(&ifmgd->mtx);
1909
1910 switch (rma) {
1911 case RX_MGMT_NONE:
1912 /* no action */
46900298 1913 break;
77fdaa12 1914 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 1915 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 1916 break;
77fdaa12 1917 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 1918 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 1919 break;
77fdaa12
JB		 1920 default:
1921 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 1922 }
1923
77fdaa12 1924 out:
f0706e82
JB		 1925 kfree_skb(skb);
1926}
1927
9c6bd790 1928static void ieee80211_sta_timer(unsigned long data)
f0706e82 1929{
60f8b39c
JB		 1930 struct ieee80211_sub_if_data *sdata =
1931 (struct ieee80211_sub_if_data *) data;
46900298 1932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 1933 struct ieee80211_local *local = sdata->local;
f0706e82 1934
5bb644a0
JB		 1935 if (local->quiescing) {
1936 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1937 return;
1938 }
1939
46900298 1940 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 1941}
1942
9c6bd790
JB		 1943static void ieee80211_sta_work(struct work_struct *work)
1944{
1945 struct ieee80211_sub_if_data *sdata =
46900298 1946 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 1947 struct ieee80211_local *local = sdata->local;
46900298 1948 struct ieee80211_if_managed *ifmgd;
9c6bd790 1949 struct sk_buff *skb;
77fdaa12
JB		 1950 struct ieee80211_mgd_work *wk, *tmp;
1951 LIST_HEAD(free_work);
1952 enum rx_mgmt_action rma;
1953 bool anybusy = false;
9c6bd790
JB		 1954
1955 if (!netif_running(sdata->dev))
1956 return;
1957
c2b13452 1958 if (local->sw_scanning || local->hw_scanning)
9c6bd790
JB		 1959 return;
1960
46900298 1961 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 1962 return;
5bb644a0
JB		 1963
1964 /*
1965 * Nothing should have been stuffed into the workqueue during
1966 * the suspend->resume cycle. If this WARN is seen then there
1967 * is a bug with either the driver suspend or something in
1968 * mac80211 stuffing into the workqueue which we haven't yet
1969 * cleared during mac80211's suspend cycle.
1970 */
1971 if (WARN_ON(local->suspended))
1972 return;
1973
46900298 1974 ifmgd = &sdata->u.mgd;
f0706e82 1975
77fdaa12 1976 /* first process frames to avoid timing out while a frame is pending */
46900298 1977 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 1978 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1979
77fdaa12
JB		 1980 /* then process the rest of the work */
1981 mutex_lock(&ifmgd->mtx);
1982
1983 list_for_each_entry(wk, &ifmgd->work_list, list) {
1984 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
1985 anybusy = true;
1986 break;
1987 }
f0706e82
JB		 1988 }
1989
77fdaa12
JB		 1990 ieee80211_recalc_idle(local);
1991
1992 if (!anybusy) {
1993 mutex_unlock(&ifmgd->mtx);
1994
1995 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
1996 queue_delayed_work(local->hw.workqueue,
1997 &local->scan_work,
1998 round_jiffies_relative(0));
9c6bd790 1999 return;
77fdaa12 2000 }
d6f2da5b 2001
77fdaa12 2002 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2003 if (time_is_after_jiffies(wk->timeout)) {
2004 /*
2005 * This work item isn't supposed to be worked on
2006 * right now, but take care to adjust the timer
2007 * properly.
2008 */
2009 run_again(ifmgd, wk->timeout);
77fdaa12 2010 continue;
ca386f31 2011 }
5cff20e6 2012
77fdaa12
JB		 2013 switch (wk->state) {
2014 default:
2015 WARN_ON(1);
2016 /* fall through */
2017 case IEEE80211_MGD_STATE_IDLE:
2018 /* nothing */
2019 rma = RX_MGMT_NONE;
2020 break;
2021 case IEEE80211_MGD_STATE_PROBE:
2022 rma = ieee80211_direct_probe(sdata, wk);
2023 break;
2024 case IEEE80211_MGD_STATE_AUTH:
2025 rma = ieee80211_authenticate(sdata, wk);
2026 break;
2027 case IEEE80211_MGD_STATE_ASSOC:
2028 rma = ieee80211_associate(sdata, wk);
2029 break;
2030 }
2031
2032 switch (rma) {
2033 case RX_MGMT_NONE:
2034 /* no action required */
2035 break;
2036 case RX_MGMT_CFG80211_AUTH_TO:
2037 case RX_MGMT_CFG80211_ASSOC_TO:
2038 list_del(&wk->list);
2039 list_add(&wk->list, &free_work);
2040 wk->tries = rma; /* small abuse but only local */
2041 break;
2042 default:
2043 WARN(1, "unexpected: %d", rma);
2044 }
2045 }
2046
2047 mutex_unlock(&ifmgd->mtx);
2048
2049 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2050 switch (wk->tries) {
2051 case RX_MGMT_CFG80211_AUTH_TO:
2052 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2053 wk->bss->cbss.bssid);
77fdaa12
JB		 2054 break;
2055 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2056 cfg80211_send_assoc_timeout(sdata->dev,
2057 wk->bss->cbss.bssid);
77fdaa12
JB		 2058 break;
2059 default:
2060 WARN(1, "unexpected: %d", wk->tries);
2061 }
2062
2063 list_del(&wk->list);
2064 kfree(wk);
9c6bd790 2065 }
77fdaa12
JB		 2066
2067 ieee80211_recalc_idle(local);
f0706e82
JB		 2068}
2069
9c6bd790
JB		 2070static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2071{
ad935687
KV		 2072 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2073 /*
2074 * Need to update last_beacon to avoid beacon loss
2075 * test to trigger.
2076 */
2077 sdata->u.mgd.last_beacon = jiffies;
2078
9c6bd790 2079 queue_work(sdata->local->hw.workqueue,
46900298 2080 &sdata->u.mgd.work);
ad935687 2081 }
9c6bd790 2082}
f0706e82 2083
5bb644a0
JB		 2084#ifdef CONFIG_PM
2085void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2086{
2087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2088
2089 /*
2090 * we need to use atomic bitops for the running bits
2091 * only because both timers might fire at the same
2092 * time -- the code here is properly synchronised.
2093 */
2094
2095 cancel_work_sync(&ifmgd->work);
2096 cancel_work_sync(&ifmgd->beacon_loss_work);
2097 if (del_timer_sync(&ifmgd->timer))
2098 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2099
2100 cancel_work_sync(&ifmgd->chswitch_work);
2101 if (del_timer_sync(&ifmgd->chswitch_timer))
2102 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
2103}
2104
2105void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2106{
2107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2108
2109 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2110 add_timer(&ifmgd->timer);
2111 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2112 add_timer(&ifmgd->chswitch_timer);
2113}
2114#endif
2115
9c6bd790
JB		 2116/* interface setup */
2117void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2118{
46900298 2119 struct ieee80211_if_managed *ifmgd;
988c0f72 2120
46900298
JB		 2121 ifmgd = &sdata->u.mgd;
2122 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
2123 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2124 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2125 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2126 (unsigned long) sdata);
46900298 2127 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2128 (unsigned long) sdata);
46900298 2129 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2130
77fdaa12
JB		 2131 INIT_LIST_HEAD(&ifmgd->work_list);
2132
46900298 2133 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2134 ifmgd->flags = 0;
176be728 2135 if (sdata->local->hw.queues >= 4)
46900298 2136 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2137
77fdaa12 2138 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2139}
2140
77fdaa12
JB		 2141/* scan finished notification */
2142void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2143{
77fdaa12 2144 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2145
77fdaa12
JB		 2146 /* Restart STA timers */
2147 rcu_read_lock();
2148 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2149 ieee80211_restart_sta_timer(sdata);
2150 rcu_read_unlock();
2151}
60f8b39c 2152
77fdaa12
JB		 2153int ieee80211_max_network_latency(struct notifier_block *nb,
2154 unsigned long data, void *dummy)
2155{
2156 s32 latency_usec = (s32) data;
2157 struct ieee80211_local *local =
2158 container_of(nb, struct ieee80211_local,
2159 network_latency_notifier);
1fa6f4af 2160
77fdaa12
JB		 2161 mutex_lock(&local->iflist_mtx);
2162 ieee80211_recalc_ps(local, latency_usec);
2163 mutex_unlock(&local->iflist_mtx);
dfe67012 2164
77fdaa12 2165 return 0;
9c6bd790
JB		 2166}
2167
77fdaa12
JB		 2168/* config hooks */
2169int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2170 struct cfg80211_auth_request *req)
9c6bd790 2171{
46900298 2172 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2173 const u8 *ssid;
2174 struct ieee80211_mgd_work *wk;
2175 u16 auth_alg;
9c6bd790 2176
77fdaa12
JB		 2177 switch (req->auth_type) {
2178 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2179 auth_alg = WLAN_AUTH_OPEN;
2180 break;
2181 case NL80211_AUTHTYPE_SHARED_KEY:
2182 auth_alg = WLAN_AUTH_SHARED_KEY;
2183 break;
2184 case NL80211_AUTHTYPE_FT:
2185 auth_alg = WLAN_AUTH_FT;
2186 break;
2187 case NL80211_AUTHTYPE_NETWORK_EAP:
2188 auth_alg = WLAN_AUTH_LEAP;
2189 break;
2190 default:
2191 return -EOPNOTSUPP;
60f8b39c 2192 }
77fdaa12
JB		 2193
2194 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2195 if (!wk)
9c6bd790 2196 return -ENOMEM;
77fdaa12
JB		 2197
2198 wk->bss = (void *)req->bss;
2199
2200 if (req->ie && req->ie_len) {
2201 memcpy(wk->ie, req->ie, req->ie_len);
2202 wk->ie_len = req->ie_len;
9c6bd790 2203 }
77fdaa12 2204
fffd0934
JB		 2205 if (req->key && req->key_len) {
2206 wk->key_len = req->key_len;
2207 wk->key_idx = req->key_idx;
2208 memcpy(wk->key, req->key, req->key_len);
2209 }
2210
77fdaa12
JB		 2211 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2212 memcpy(wk->ssid, ssid + 2, ssid[1]);
2213 wk->ssid_len = ssid[1];
2214
2215 wk->state = IEEE80211_MGD_STATE_PROBE;
2216 wk->auth_alg = auth_alg;
2217
2218 /*
2219 * XXX: if still associated need to tell AP that we're going
2220 * to sleep and then change channel etc.
2221 */
2222 sdata->local->oper_channel = req->bss->channel;
2223 ieee80211_hw_config(sdata->local, 0);
2224
2225 mutex_lock(&ifmgd->mtx);
2226 list_add(&wk->list, &sdata->u.mgd.work_list);
2227 mutex_unlock(&ifmgd->mtx);
2228
2229 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
9c6bd790 2230 return 0;
60f8b39c
JB		 2231}
2232
77fdaa12
JB		 2233int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2234 struct cfg80211_assoc_request *req)
f0706e82 2235{
77fdaa12
JB		 2236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2237 struct ieee80211_mgd_work *wk, *found = NULL;
2238 int i, err;
f0706e82 2239
77fdaa12
JB		 2240 mutex_lock(&ifmgd->mtx);
2241
2242 list_for_each_entry(wk, &ifmgd->work_list, list) {
2243 if (&wk->bss->cbss == req->bss &&
2244 wk->state == IEEE80211_MGD_STATE_IDLE) {
2245 found = wk;
2246 break;
2247 }
2248 }
2249
2250 if (!found) {
2251 err = -ENOLINK;
2252 goto out;
2253 }
2254
2255 list_del(&found->list);
2256
2257 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2258 if (!wk) {
2259 list_add(&found->list, &ifmgd->work_list);
2260 err = -ENOMEM;
2261 goto out;
2262 }
2263
2264 list_add(&wk->list, &ifmgd->work_list);
2265
2266 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2267
2268 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2269 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2270 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2271 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2272 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2273
2274 sdata->local->oper_channel = req->bss->channel;
2275 ieee80211_hw_config(sdata->local, 0);
2276
2277 if (req->ie && req->ie_len) {
2278 memcpy(wk->ie, req->ie, req->ie_len);
2279 wk->ie_len = req->ie_len;
2280 } else
2281 wk->ie_len = 0;
2282
2283 if (req->prev_bssid)
2284 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2285
2286 wk->state = IEEE80211_MGD_STATE_ASSOC;
2287 wk->tries = 0;
2288
2289 if (req->use_mfp) {
2290 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2291 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2292 } else {
2293 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2294 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2295 }
2296
2297 if (req->crypto.control_port)
2298 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2299 else
2300 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2301
2302 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2303
2304 err = 0;
2305
2306 out:
2307 mutex_unlock(&ifmgd->mtx);
2308 return err;
f0706e82
JB		 2309}
2310
77fdaa12 2311int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2312 struct cfg80211_deauth_request *req,
2313 void *cookie)
f0706e82 2314{
46900298 2315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2316 struct ieee80211_mgd_work *wk;
2317 const u8 *bssid = NULL;
f0706e82 2318
77fdaa12
JB		 2319 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2320 sdata->dev->name, req->reason_code);
2321
2322 mutex_lock(&ifmgd->mtx);
2323
2324 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2325 bssid = req->bss->bssid;
2326 ieee80211_set_disassoc(sdata, bssid, true);
2327 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2328 if (&wk->bss->cbss == req->bss) {
2329 bssid = req->bss->bssid;
2330 list_del(&wk->list);
2331 kfree(wk);
2332 break;
2333 }
2334 }
f0706e82 2335
77fdaa12
JB		 2336 /* cfg80211 should catch this... */
2337 if (WARN_ON(!bssid)) {
2338 mutex_unlock(&ifmgd->mtx);
46900298 2339 return -ENOLINK;
77fdaa12
JB		 2340 }
2341
2342 mutex_unlock(&ifmgd->mtx);
2343
2344 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2345 IEEE80211_STYPE_DEAUTH, req->reason_code,
2346 cookie);
f0706e82 2347
f0706e82
JB		 2348 return 0;
2349}
84363e6e 2350
77fdaa12 2351int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2352 struct cfg80211_disassoc_request *req,
2353 void *cookie)
9c6bd790 2354{
77fdaa12 2355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2356
77fdaa12
JB		 2357 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2358 sdata->dev->name, req->reason_code);
10f644a4 2359
77fdaa12 2360 mutex_lock(&ifmgd->mtx);
10f644a4 2361
77fdaa12
JB		 2362 /* cfg80211 should catch that */
2363 if (WARN_ON(&ifmgd->associated->cbss != req->bss)) {
2364 mutex_unlock(&ifmgd->mtx);
2365 return -ENOLINK;
2366 }
2367
2368 ieee80211_set_disassoc(sdata, req->bss->bssid, false);
2369
2370 mutex_unlock(&ifmgd->mtx);
10f644a4 2371
77fdaa12 2372 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2373 IEEE80211_STYPE_DISASSOC, req->reason_code,
2374 cookie);
10f644a4
JB		 2375 return 0;
2376}
Linux 6.x block layer and io_uring tree(s)