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at76c50x-usb: remove unneeded flush_workqueue() at usb disconnect
[mirror_ubuntu-bionic-kernel.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
b291ba11
JB		 34
35/*
36 * beacon loss detection timeout
37 * XXX: should depend on beacon interval
38 */
39#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
40/*
41 * Time the connection can be idle before we probe
42 * it to see if we can still talk to the AP.
43 */
44#define IEEE80211_CONNECTION_IDLE_TIME (2 * HZ)
45/*
46 * Time we wait for a probe response after sending
47 * a probe request because of beacon loss or for
48 * checking the connection still works.
49 */
50#define IEEE80211_PROBE_WAIT (HZ / 5)
f0706e82 51
5bb644a0
JB		 52#define TMR_RUNNING_TIMER 0
53#define TMR_RUNNING_CHANSW 1
54
77fdaa12
JB		 55/*
56 * All cfg80211 functions have to be called outside a locked
57 * section so that they can acquire a lock themselves... This
58 * is much simpler than queuing up things in cfg80211, but we
59 * do need some indirection for that here.
60 */
61enum rx_mgmt_action {
62 /* no action required */
63 RX_MGMT_NONE,
64
65 /* caller must call cfg80211_send_rx_auth() */
66 RX_MGMT_CFG80211_AUTH,
67
68 /* caller must call cfg80211_send_rx_assoc() */
69 RX_MGMT_CFG80211_ASSOC,
70
71 /* caller must call cfg80211_send_deauth() */
72 RX_MGMT_CFG80211_DEAUTH,
73
74 /* caller must call cfg80211_send_disassoc() */
75 RX_MGMT_CFG80211_DISASSOC,
76
77 /* caller must call cfg80211_auth_timeout() & free work */
78 RX_MGMT_CFG80211_AUTH_TO,
79
80 /* caller must call cfg80211_assoc_timeout() & free work */
81 RX_MGMT_CFG80211_ASSOC_TO,
82};
83
5484e237 84/* utils */
77fdaa12
JB		 85static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
86{
87 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
88}
89
ca386f31
JB		 90/*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
100static void run_again(struct ieee80211_if_managed *ifmgd,
101 unsigned long timeout)
102{
103 ASSERT_MGD_MTX(ifmgd);
104
105 if (!timer_pending(&ifmgd->timer) ||
106 time_before(timeout, ifmgd->timer.expires))
107 mod_timer(&ifmgd->timer, timeout);
108}
109
b291ba11
JB		 110static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
111{
112 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
113 return;
114
115 mod_timer(&sdata->u.mgd.bcn_mon_timer,
116 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
117}
118
5484e237 119static int ecw2cw(int ecw)
60f8b39c 120{
5484e237 121 return (1 << ecw) - 1;
60f8b39c
JB		 122}
123
c2b13452 124static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
9ac19a90 125 struct ieee80211_supported_band *sband,
881d948c 126 u32 *rates)
9ac19a90
JB		 127{
128 int i, j, count;
129 *rates = 0;
130 count = 0;
131 for (i = 0; i < bss->supp_rates_len; i++) {
132 int rate = (bss->supp_rates[i] & 0x7F) * 5;
133
134 for (j = 0; j < sband->n_bitrates; j++)
135 if (sband->bitrates[j].bitrate == rate) {
136 *rates |= BIT(j);
137 count++;
138 break;
139 }
140 }
141
142 return count;
143}
144
d5522e03
JB		 145/*
146 * ieee80211_enable_ht should be called only after the operating band
147 * has been determined as ht configuration depends on the hw's
148 * HT abilities for a specific band.
149 */
150static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_ht_info *hti,
77fdaa12 152 const u8 *bssid, u16 ap_ht_cap_flags)
d5522e03
JB		 153{
154 struct ieee80211_local *local = sdata->local;
155 struct ieee80211_supported_band *sband;
d5522e03
JB		 156 struct sta_info *sta;
157 u32 changed = 0;
9ed6bcce 158 u16 ht_opmode;
d5522e03
JB		 159 bool enable_ht = true, ht_changed;
160 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
161
162 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
163
d5522e03
JB		 164 /* HT is not supported */
165 if (!sband->ht_cap.ht_supported)
166 enable_ht = false;
167
168 /* check that channel matches the right operating channel */
169 if (local->hw.conf.channel->center_freq !=
170 ieee80211_channel_to_frequency(hti->control_chan))
171 enable_ht = false;
172
173 if (enable_ht) {
174 channel_type = NL80211_CHAN_HT20;
175
176 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
177 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
178 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
179 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
180 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
768777ea
LR		 181 if (!(local->hw.conf.channel->flags &
182 IEEE80211_CHAN_NO_HT40PLUS))
183 channel_type = NL80211_CHAN_HT40PLUS;
d5522e03
JB		 184 break;
185 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
768777ea
LR		 186 if (!(local->hw.conf.channel->flags &
187 IEEE80211_CHAN_NO_HT40MINUS))
188 channel_type = NL80211_CHAN_HT40MINUS;
d5522e03
JB		 189 break;
190 }
191 }
192 }
193
194 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
195 channel_type != local->hw.conf.channel_type;
196
197 local->oper_channel_type = channel_type;
198
199 if (ht_changed) {
200 /* channel_type change automatically detected */
201 ieee80211_hw_config(local, 0);
202
203 rcu_read_lock();
77fdaa12 204 sta = sta_info_get(local, bssid);
d5522e03
JB		 205 if (sta)
206 rate_control_rate_update(local, sband, sta,
207 IEEE80211_RC_HT_CHANGED);
d5522e03 208 rcu_read_unlock();
d5522e03
JB		 209 }
210
211 /* disable HT */
212 if (!enable_ht)
213 return 0;
214
9ed6bcce 215 ht_opmode = le16_to_cpu(hti->operation_mode);
d5522e03
JB		 216
217 /* if bss configuration changed store the new one */
413ad50a
JB		 218 if (!sdata->ht_opmode_valid ||
219 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
d5522e03 220 changed |= BSS_CHANGED_HT;
9ed6bcce 221 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
413ad50a 222 sdata->ht_opmode_valid = true;
d5522e03
JB		 223 }
224
225 return changed;
226}
227
9c6bd790
JB		 228/* frame sending functions */
229
77fdaa12
JB		 230static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
231 struct ieee80211_mgd_work *wk)
9ac19a90 232{
46900298 233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 234 struct ieee80211_local *local = sdata->local;
235 struct sk_buff *skb;
236 struct ieee80211_mgmt *mgmt;
517357c6
JB		 237 u8 *pos;
238 const u8 *ies, *ht_ie;
9ac19a90
JB		 239 int i, len, count, rates_len, supp_rates_len;
240 u16 capab;
9ac19a90
JB		 241 int wmm = 0;
242 struct ieee80211_supported_band *sband;
881d948c 243 u32 rates = 0;
9ac19a90
JB		 244
245 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
77fdaa12
JB		 246 sizeof(*mgmt) + 200 + wk->ie_len +
247 wk->ssid_len);
9ac19a90
JB		 248 if (!skb) {
249 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
250 "frame\n", sdata->dev->name);
251 return;
252 }
253 skb_reserve(skb, local->hw.extra_tx_headroom);
254
255 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
256
46900298 257 capab = ifmgd->capab;
9ac19a90
JB		 258
259 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
260 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
261 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
262 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
263 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
264 }
265
77fdaa12
JB		 266 if (wk->bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
267 capab |= WLAN_CAPABILITY_PRIVACY;
268 if (wk->bss->wmm_used)
269 wmm = 1;
9ac19a90 270
77fdaa12
JB		 271 /* get all rates supported by the device and the AP as
272 * some APs don't like getting a superset of their rates
273 * in the association request (e.g. D-Link DAP 1353 in
274 * b-only mode) */
275 rates_len = ieee80211_compatible_rates(wk->bss, sband, &rates);
9ac19a90 276
77fdaa12
JB		 277 if ((wk->bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
278 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
279 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
9ac19a90
JB		 280
281 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
282 memset(mgmt, 0, 24);
77fdaa12 283 memcpy(mgmt->da, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 284 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 285 memcpy(mgmt->bssid, wk->bss->cbss.bssid, ETH_ALEN);
9ac19a90 286
77fdaa12 287 if (!is_zero_ether_addr(wk->prev_bssid)) {
9ac19a90
JB		 288 skb_put(skb, 10);
289 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
290 IEEE80211_STYPE_REASSOC_REQ);
291 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
292 mgmt->u.reassoc_req.listen_interval =
293 cpu_to_le16(local->hw.conf.listen_interval);
77fdaa12 294 memcpy(mgmt->u.reassoc_req.current_ap, wk->prev_bssid,
9ac19a90
JB		 295 ETH_ALEN);
296 } else {
297 skb_put(skb, 4);
298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
299 IEEE80211_STYPE_ASSOC_REQ);
300 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
13554121 301 mgmt->u.assoc_req.listen_interval =
9ac19a90
JB		 302 cpu_to_le16(local->hw.conf.listen_interval);
303 }
304
305 /* SSID */
77fdaa12 306 ies = pos = skb_put(skb, 2 + wk->ssid_len);
9ac19a90 307 *pos++ = WLAN_EID_SSID;
77fdaa12
JB		 308 *pos++ = wk->ssid_len;
309 memcpy(pos, wk->ssid, wk->ssid_len);
9ac19a90
JB		 310
311 /* add all rates which were marked to be used above */
312 supp_rates_len = rates_len;
313 if (supp_rates_len > 8)
314 supp_rates_len = 8;
315
316 len = sband->n_bitrates;
317 pos = skb_put(skb, supp_rates_len + 2);
318 *pos++ = WLAN_EID_SUPP_RATES;
319 *pos++ = supp_rates_len;
320
321 count = 0;
322 for (i = 0; i < sband->n_bitrates; i++) {
323 if (BIT(i) & rates) {
324 int rate = sband->bitrates[i].bitrate;
325 *pos++ = (u8) (rate / 5);
326 if (++count == 8)
327 break;
328 }
329 }
330
331 if (rates_len > count) {
332 pos = skb_put(skb, rates_len - count + 2);
333 *pos++ = WLAN_EID_EXT_SUPP_RATES;
334 *pos++ = rates_len - count;
335
336 for (i++; i < sband->n_bitrates; i++) {
337 if (BIT(i) & rates) {
338 int rate = sband->bitrates[i].bitrate;
339 *pos++ = (u8) (rate / 5);
340 }
341 }
342 }
343
344 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
345 /* 1. power capabilities */
346 pos = skb_put(skb, 4);
347 *pos++ = WLAN_EID_PWR_CAPABILITY;
348 *pos++ = 2;
349 *pos++ = 0; /* min tx power */
350 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
351
352 /* 2. supported channels */
353 /* TODO: get this in reg domain format */
354 pos = skb_put(skb, 2 * sband->n_channels + 2);
355 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
356 *pos++ = 2 * sband->n_channels;
357 for (i = 0; i < sband->n_channels; i++) {
358 *pos++ = ieee80211_frequency_to_channel(
359 sband->channels[i].center_freq);
360 *pos++ = 1; /* one channel in the subband*/
361 }
362 }
363
77fdaa12
JB		 364 if (wk->ie_len && wk->ie) {
365 pos = skb_put(skb, wk->ie_len);
366 memcpy(pos, wk->ie, wk->ie_len);
9ac19a90
JB		 367 }
368
46900298 369 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) {
9ac19a90
JB		 370 pos = skb_put(skb, 9);
371 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
372 *pos++ = 7; /* len */
373 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
374 *pos++ = 0x50;
375 *pos++ = 0xf2;
376 *pos++ = 2; /* WME */
377 *pos++ = 0; /* WME info */
378 *pos++ = 1; /* WME ver */
379 *pos++ = 0;
380 }
381
382 /* wmm support is a must to HT */
eb46936b
VT		 383 /*
384 * IEEE802.11n does not allow TKIP/WEP as pairwise
385 * ciphers in HT mode. We still associate in non-ht
386 * mode (11a/b/g) if any one of these ciphers is
387 * configured as pairwise.
388 */
46900298 389 if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
d9fe60de 390 sband->ht_cap.ht_supported &&
77fdaa12 391 (ht_ie = ieee80211_bss_get_ie(&wk->bss->cbss, WLAN_EID_HT_INFORMATION)) &&
eb46936b 392 ht_ie[1] >= sizeof(struct ieee80211_ht_info) &&
ab1faead 393 (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) {
d9fe60de
JB		 394 struct ieee80211_ht_info *ht_info =
395 (struct ieee80211_ht_info *)(ht_ie + 2);
396 u16 cap = sband->ht_cap.cap;
9ac19a90
JB		 397 __le16 tmp;
398 u32 flags = local->hw.conf.channel->flags;
399
d9fe60de
JB		 400 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
401 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
689da1b3 402 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
d9fe60de 403 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 404 cap &= ~IEEE80211_HT_CAP_SGI_40;
405 }
406 break;
d9fe60de 407 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
689da1b3 408 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
d9fe60de 409 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
9ac19a90
JB		 410 cap &= ~IEEE80211_HT_CAP_SGI_40;
411 }
412 break;
413 }
414
415 tmp = cpu_to_le16(cap);
416 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
417 *pos++ = WLAN_EID_HT_CAPABILITY;
418 *pos++ = sizeof(struct ieee80211_ht_cap);
419 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
420 memcpy(pos, &tmp, sizeof(u16));
421 pos += sizeof(u16);
422 /* TODO: needs a define here for << 2 */
d9fe60de
JB		 423 *pos++ = sband->ht_cap.ampdu_factor |
424 (sband->ht_cap.ampdu_density << 2);
425 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
9ac19a90
JB		 426 }
427
e50db65c 428 ieee80211_tx_skb(sdata, skb, 0);
9ac19a90
JB		 429}
430
431
ef422bc0 432static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 433 const u8 *bssid, u16 stype, u16 reason,
434 void *cookie)
9ac19a90
JB		 435{
436 struct ieee80211_local *local = sdata->local;
46900298 437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90
JB		 438 struct sk_buff *skb;
439 struct ieee80211_mgmt *mgmt;
9aed3cc1 440
65fc73ac 441 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
9ac19a90 442 if (!skb) {
ef422bc0
JB		 443 printk(KERN_DEBUG "%s: failed to allocate buffer for "
444 "deauth/disassoc frame\n", sdata->dev->name);
9ac19a90
JB		 445 return;
446 }
447 skb_reserve(skb, local->hw.extra_tx_headroom);
448
449 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
450 memset(mgmt, 0, 24);
77fdaa12 451 memcpy(mgmt->da, bssid, ETH_ALEN);
9ac19a90 452 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
77fdaa12 453 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 454 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
9ac19a90 455 skb_put(skb, 2);
ef422bc0 456 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 457 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
458
53b46b84 459 if (stype == IEEE80211_STYPE_DEAUTH)
667503dd 460 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, cookie);
53b46b84 461 else
667503dd 462 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len, cookie);
46900298 463 ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED);
9ac19a90
JB		 464}
465
572e0012
KV		 466void ieee80211_send_pspoll(struct ieee80211_local *local,
467 struct ieee80211_sub_if_data *sdata)
468{
46900298 469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
572e0012
KV		 470 struct ieee80211_pspoll *pspoll;
471 struct sk_buff *skb;
472 u16 fc;
473
474 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
475 if (!skb) {
476 printk(KERN_DEBUG "%s: failed to allocate buffer for "
477 "pspoll frame\n", sdata->dev->name);
478 return;
479 }
480 skb_reserve(skb, local->hw.extra_tx_headroom);
481
482 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
483 memset(pspoll, 0, sizeof(*pspoll));
484 fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM;
485 pspoll->frame_control = cpu_to_le16(fc);
46900298 486 pspoll->aid = cpu_to_le16(ifmgd->aid);
572e0012
KV		 487
488 /* aid in PS-Poll has its two MSBs each set to 1 */
489 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
490
46900298 491 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
572e0012
KV		 492 memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN);
493
494 ieee80211_tx_skb(sdata, skb, 0);
572e0012
KV		 495}
496
965bedad
JB		 497void ieee80211_send_nullfunc(struct ieee80211_local *local,
498 struct ieee80211_sub_if_data *sdata,
499 int powersave)
500{
501 struct sk_buff *skb;
502 struct ieee80211_hdr *nullfunc;
503 __le16 fc;
504
505 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
506 return;
507
508 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
509 if (!skb) {
510 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
511 "frame\n", sdata->dev->name);
512 return;
513 }
514 skb_reserve(skb, local->hw.extra_tx_headroom);
515
516 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
517 memset(nullfunc, 0, 24);
518 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
519 IEEE80211_FCTL_TODS);
520 if (powersave)
521 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
522 nullfunc->frame_control = fc;
523 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
524 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
525 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
526
527 ieee80211_tx_skb(sdata, skb, 0);
528}
529
cc32abd4
JB		 530/* spectrum management related things */
531static void ieee80211_chswitch_work(struct work_struct *work)
532{
533 struct ieee80211_sub_if_data *sdata =
534 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
536
537 if (!netif_running(sdata->dev))
538 return;
539
77fdaa12
JB		 540 mutex_lock(&ifmgd->mtx);
541 if (!ifmgd->associated)
542 goto out;
cc32abd4
JB		 543
544 sdata->local->oper_channel = sdata->local->csa_channel;
77fdaa12
JB		 545 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
546
cc32abd4 547 /* XXX: shouldn't really modify cfg80211-owned data! */
77fdaa12 548 ifmgd->associated->cbss.channel = sdata->local->oper_channel;
cc32abd4 549
cc32abd4
JB		 550 ieee80211_wake_queues_by_reason(&sdata->local->hw,
551 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 552 out:
553 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
554 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 555}
556
557static void ieee80211_chswitch_timer(unsigned long data)
558{
559 struct ieee80211_sub_if_data *sdata =
560 (struct ieee80211_sub_if_data *) data;
561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
562
5bb644a0
JB		 563 if (sdata->local->quiescing) {
564 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
565 return;
566 }
567
cc32abd4
JB		 568 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
569}
570
571void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
572 struct ieee80211_channel_sw_ie *sw_elem,
573 struct ieee80211_bss *bss)
574{
575 struct ieee80211_channel *new_ch;
576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
577 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
578
77fdaa12
JB		 579 ASSERT_MGD_MTX(ifmgd);
580
581 if (!ifmgd->associated)
cc32abd4
JB		 582 return;
583
fbe9c429 584 if (sdata->local->scanning)
cc32abd4
JB		 585 return;
586
587 /* Disregard subsequent beacons if we are already running a timer
588 processing a CSA */
589
590 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
591 return;
592
593 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
594 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
595 return;
596
597 sdata->local->csa_channel = new_ch;
598
599 if (sw_elem->count <= 1) {
600 queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work);
601 } else {
602 ieee80211_stop_queues_by_reason(&sdata->local->hw,
603 IEEE80211_QUEUE_STOP_REASON_CSA);
604 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
605 mod_timer(&ifmgd->chswitch_timer,
606 jiffies +
607 msecs_to_jiffies(sw_elem->count *
608 bss->cbss.beacon_interval));
609 }
610}
611
612static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
613 u16 capab_info, u8 *pwr_constr_elem,
614 u8 pwr_constr_elem_len)
615{
616 struct ieee80211_conf *conf = &sdata->local->hw.conf;
617
618 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
619 return;
620
621 /* Power constraint IE length should be 1 octet */
622 if (pwr_constr_elem_len != 1)
623 return;
624
625 if ((*pwr_constr_elem <= conf->channel->max_power) &&
626 (*pwr_constr_elem != sdata->local->power_constr_level)) {
627 sdata->local->power_constr_level = *pwr_constr_elem;
628 ieee80211_hw_config(sdata->local, 0);
629 }
630}
631
965bedad
JB		 632/* powersave */
633static void ieee80211_enable_ps(struct ieee80211_local *local,
634 struct ieee80211_sub_if_data *sdata)
635{
636 struct ieee80211_conf *conf = &local->hw.conf;
637
d5edaedc
JB		 638 /*
639 * If we are scanning right now then the parameters will
640 * take effect when scan finishes.
641 */
fbe9c429 642 if (local->scanning)
d5edaedc
JB		 643 return;
644
965bedad
JB		 645 if (conf->dynamic_ps_timeout > 0 &&
646 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
647 mod_timer(&local->dynamic_ps_timer, jiffies +
648 msecs_to_jiffies(conf->dynamic_ps_timeout));
649 } else {
650 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
651 ieee80211_send_nullfunc(local, sdata, 1);
652 conf->flags |= IEEE80211_CONF_PS;
653 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
654 }
655}
656
657static void ieee80211_change_ps(struct ieee80211_local *local)
658{
659 struct ieee80211_conf *conf = &local->hw.conf;
660
661 if (local->ps_sdata) {
965bedad
JB		 662 ieee80211_enable_ps(local, local->ps_sdata);
663 } else if (conf->flags & IEEE80211_CONF_PS) {
664 conf->flags &= ~IEEE80211_CONF_PS;
665 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
666 del_timer_sync(&local->dynamic_ps_timer);
667 cancel_work_sync(&local->dynamic_ps_enable_work);
668 }
669}
670
671/* need to hold RTNL or interface lock */
10f644a4 672void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 673{
674 struct ieee80211_sub_if_data *sdata, *found = NULL;
675 int count = 0;
676
677 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
678 local->ps_sdata = NULL;
679 return;
680 }
681
682 list_for_each_entry(sdata, &local->interfaces, list) {
683 if (!netif_running(sdata->dev))
684 continue;
685 if (sdata->vif.type != NL80211_IFTYPE_STATION)
686 continue;
687 found = sdata;
688 count++;
689 }
690
43f78531 691 if (count == 1 && found->u.mgd.powersave &&
77fdaa12 692 found->u.mgd.associated && list_empty(&found->u.mgd.work_list) &&
b291ba11
JB		 693 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
694 IEEE80211_STA_CONNECTION_POLL))) {
10f644a4
JB		 695 s32 beaconint_us;
696
697 if (latency < 0)
698 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
699
700 beaconint_us = ieee80211_tu_to_usec(
701 found->vif.bss_conf.beacon_int);
702
04fe2037 703 if (beaconint_us > latency) {
10f644a4 704 local->ps_sdata = NULL;
04fe2037
JB		 705 } else {
706 u8 dtimper = found->vif.bss_conf.dtim_period;
707 int maxslp = 1;
708
709 if (dtimper > 1)
710 maxslp = min_t(int, dtimper,
711 latency / beaconint_us);
712
9ccebe61 713 local->hw.conf.max_sleep_period = maxslp;
10f644a4 714 local->ps_sdata = found;
04fe2037 715 }
10f644a4 716 } else {
965bedad 717 local->ps_sdata = NULL;
10f644a4 718 }
965bedad
JB		 719
720 ieee80211_change_ps(local);
721}
722
723void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
724{
725 struct ieee80211_local *local =
726 container_of(work, struct ieee80211_local,
727 dynamic_ps_disable_work);
728
729 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
730 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
731 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
732 }
733
734 ieee80211_wake_queues_by_reason(&local->hw,
735 IEEE80211_QUEUE_STOP_REASON_PS);
736}
737
738void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
739{
740 struct ieee80211_local *local =
741 container_of(work, struct ieee80211_local,
742 dynamic_ps_enable_work);
743 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
744
745 /* can only happen when PS was just disabled anyway */
746 if (!sdata)
747 return;
748
749 if (local->hw.conf.flags & IEEE80211_CONF_PS)
750 return;
751
752 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
753 ieee80211_send_nullfunc(local, sdata, 1);
754
755 local->hw.conf.flags |= IEEE80211_CONF_PS;
756 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
757}
758
759void ieee80211_dynamic_ps_timer(unsigned long data)
760{
761 struct ieee80211_local *local = (void *) data;
762
78f1a8b7 763 if (local->quiescing || local->suspended)
5bb644a0
JB		 764 return;
765
965bedad
JB		 766 queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work);
767}
768
60f8b39c 769/* MLME */
f698d856 770static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
46900298 771 struct ieee80211_if_managed *ifmgd,
f0706e82
JB		 772 u8 *wmm_param, size_t wmm_param_len)
773{
f0706e82
JB		 774 struct ieee80211_tx_queue_params params;
775 size_t left;
776 int count;
777 u8 *pos;
778
46900298 779 if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED))
3434fbd3
JB		 780 return;
781
782 if (!wmm_param)
783 return;
784
f0706e82
JB		 785 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
786 return;
787 count = wmm_param[6] & 0x0f;
46900298 788 if (count == ifmgd->wmm_last_param_set)
f0706e82 789 return;
46900298 790 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 791
792 pos = wmm_param + 8;
793 left = wmm_param_len - 8;
794
795 memset(&params, 0, sizeof(params));
796
f0706e82
JB		 797 local->wmm_acm = 0;
798 for (; left >= 4; left -= 4, pos += 4) {
799 int aci = (pos[0] >> 5) & 0x03;
800 int acm = (pos[0] >> 4) & 0x01;
801 int queue;
802
803 switch (aci) {
0eeb59fe 804 case 1: /* AC_BK */
e100bb64 805 queue = 3;
988c0f72 806 if (acm)
0eeb59fe 807 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
f0706e82 808 break;
0eeb59fe 809 case 2: /* AC_VI */
e100bb64 810 queue = 1;
988c0f72 811 if (acm)
0eeb59fe 812 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
f0706e82 813 break;
0eeb59fe 814 case 3: /* AC_VO */
e100bb64 815 queue = 0;
988c0f72 816 if (acm)
0eeb59fe 817 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
f0706e82 818 break;
0eeb59fe 819 case 0: /* AC_BE */
f0706e82 820 default:
e100bb64 821 queue = 2;
988c0f72 822 if (acm)
0eeb59fe 823 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
f0706e82
JB		 824 break;
825 }
826
827 params.aifs = pos[0] & 0x0f;
828 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
829 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 830 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 831#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 832 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 833 "cWmin=%d cWmax=%d txop=%d\n",
0bffe40f
JB		 834 wiphy_name(local->hw.wiphy), queue, aci, acm,
835 params.aifs, params.cw_min, params.cw_max, params.txop);
3330d7be 836#endif
24487981 837 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
f0706e82 838 printk(KERN_DEBUG "%s: failed to set TX queue "
0bffe40f
JB		 839 "parameters for queue %d\n",
840 wiphy_name(local->hw.wiphy), queue);
f0706e82
JB		 841 }
842}
843
7a5158ef
JB		 844static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
845 u16 capab, bool erp_valid, u8 erp)
5628221c 846{
bda3933a 847 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 848 u32 changed = 0;
7a5158ef
JB		 849 bool use_protection;
850 bool use_short_preamble;
851 bool use_short_slot;
852
853 if (erp_valid) {
854 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
855 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
856 } else {
857 use_protection = false;
858 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
859 }
860
861 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
5628221c 862
471b3efd 863 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 864 bss_conf->use_cts_prot = use_protection;
865 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 866 }
7e9ed188 867
d43c7b37 868 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 869 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 870 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 871 }
d9430a32 872
7a5158ef 873 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 874 bss_conf->use_short_slot = use_short_slot;
875 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 876 }
877
878 return changed;
879}
880
f698d856 881static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
77fdaa12 882 struct ieee80211_bss *bss,
ae5eb026 883 u32 bss_info_changed)
f0706e82 884{
471b3efd 885 struct ieee80211_local *local = sdata->local;
d6f2da5b 886
ae5eb026 887 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12
JB		 888 /* set timing information */
889 sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
890 sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
891 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
5628221c 892
77fdaa12
JB		 893 bss_info_changed |= BSS_CHANGED_BEACON_INT;
894 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
895 bss->cbss.capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 896
77fdaa12
JB		 897 sdata->u.mgd.associated = bss;
898 memcpy(sdata->u.mgd.bssid, bss->cbss.bssid, ETH_ALEN);
f0706e82 899
b291ba11
JB		 900 /* just to be sure */
901 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
902 IEEE80211_STA_BEACON_POLL);
903
9ac19a90 904 ieee80211_led_assoc(local, 1);
9306102e 905
bda3933a 906 sdata->vif.bss_conf.assoc = 1;
96dd22ac
JB		 907 /*
908 * For now just always ask the driver to update the basic rateset
909 * when we have associated, we aren't checking whether it actually
910 * changed or not.
911 */
ae5eb026 912 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
9cef8737
JB		 913
914 /* And the BSSID changed - we're associated now */
915 bss_info_changed |= BSS_CHANGED_BSSID;
916
ae5eb026 917 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 918
965bedad 919 /* will be same as sdata */
04fe2037
JB		 920 if (local->ps_sdata) {
921 mutex_lock(&local->iflist_mtx);
922 ieee80211_recalc_ps(local, -1);
923 mutex_unlock(&local->iflist_mtx);
924 }
e0cb686f 925
9ac19a90
JB		 926 netif_tx_start_all_queues(sdata->dev);
927 netif_carrier_on(sdata->dev);
f0706e82
JB		 928}
929
77fdaa12
JB		 930static enum rx_mgmt_action __must_check
931ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
932 struct ieee80211_mgd_work *wk)
f0706e82 933{
46900298 934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 935 struct ieee80211_local *local = sdata->local;
46900298 936
77fdaa12
JB		 937 wk->tries++;
938 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 939 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 940 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 941
942 /*
943 * Most likely AP is not in the range so remove the
77fdaa12 944 * bss struct for that AP.
7a947080 945 */
77fdaa12 946 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 947
948 /*
949 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 950 * due to work needing to be done. Hence, queue the STAs work
951 * again for that.
11432379
HS		 952 */
953 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 954 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 955 }
f0706e82 956
77fdaa12
JB		 957 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
958 sdata->dev->name, wk->bss->cbss.bssid,
959 wk->tries);
f0706e82 960
77fdaa12
JB		 961 /*
962 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 963 * will not answer to direct packet in unassociated state.
964 */
77fdaa12
JB		 965 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
966
967 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 968 run_again(ifmgd, wk->timeout);
9ac19a90 969
77fdaa12 970 return RX_MGMT_NONE;
60f8b39c 971}
f0706e82 972
9ac19a90 973
77fdaa12
JB		 974static enum rx_mgmt_action __must_check
975ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
976 struct ieee80211_mgd_work *wk)
f0706e82 977{
46900298 978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 979 struct ieee80211_local *local = sdata->local;
46900298 980
77fdaa12
JB		 981 wk->tries++;
982 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 983 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 984 " timed out\n",
77fdaa12
JB		 985 sdata->dev->name, wk->bss->cbss.bssid);
986
987 /*
988 * Most likely AP is not in the range so remove the
989 * bss struct for that AP.
990 */
991 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 992
993 /*
994 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 995 * due to work needing to be done. Hence, queue the STAs work
996 * again for that.
11432379
HS		 997 */
998 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 999 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 1000 }
f0706e82 1001
77fdaa12
JB		 1002 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1003 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1004
1005 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1006 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1007 wk->auth_transaction = 2;
f0706e82 1008
77fdaa12 1009 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1010 run_again(ifmgd, wk->timeout);
9ac19a90 1011
77fdaa12 1012 return RX_MGMT_NONE;
f0706e82
JB		 1013}
1014
b291ba11 1015static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 1016{
46900298 1017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1018 struct ieee80211_local *local = sdata->local;
1019 struct sta_info *sta;
e0cb686f 1020 u32 changed = 0, config_changed = 0;
b291ba11 1021 u8 bssid[ETH_ALEN];
aa458d17 1022
77fdaa12
JB		 1023 ASSERT_MGD_MTX(ifmgd);
1024
b291ba11
JB		 1025 if (WARN_ON(!ifmgd->associated))
1026 return;
1027
1028 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1029
77fdaa12
JB		 1030 ifmgd->associated = NULL;
1031 memset(ifmgd->bssid, 0, ETH_ALEN);
1032
1033 /*
1034 * we need to commit the associated = NULL change because the
1035 * scan code uses that to determine whether this iface should
1036 * go to/wake up from powersave or not -- and could otherwise
1037 * wake the queues erroneously.
1038 */
1039 smp_mb();
1040
1041 /*
1042 * Thus, we can only afterwards stop the queues -- to account
1043 * for the case where another CPU is finishing a scan at this
1044 * time -- we don't want the scan code to enable queues.
1045 */
aa458d17 1046
24e64622 1047 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1048 netif_carrier_off(sdata->dev);
1049
1fa6f4af 1050 rcu_read_lock();
77fdaa12 1051 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1052 if (sta)
1053 ieee80211_sta_tear_down_BA_sessions(sta);
1054 rcu_read_unlock();
aa458d17 1055
f5e5bf25
TW		 1056 changed |= ieee80211_reset_erp_info(sdata);
1057
f5e5bf25 1058 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1059 changed |= BSS_CHANGED_ASSOC;
1060 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1061
aa837e1d
JB		 1062 ieee80211_set_wmm_default(sdata);
1063
5cff20e6
JB		 1064 ieee80211_recalc_idle(local);
1065
4797938c 1066 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1067 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1068
413ad50a
JB		 1069 /* on the next assoc, re-program HT parameters */
1070 sdata->ht_opmode_valid = false;
1071
a8302de9
VT		 1072 local->power_constr_level = 0;
1073
520eb820
KV		 1074 del_timer_sync(&local->dynamic_ps_timer);
1075 cancel_work_sync(&local->dynamic_ps_enable_work);
1076
e0cb686f
KV		 1077 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1078 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1079 config_changed |= IEEE80211_CONF_CHANGE_PS;
1080 }
ae5eb026 1081
e0cb686f 1082 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1083
1084 /* And the BSSID changed -- not very interesting here */
1085 changed |= BSS_CHANGED_BSSID;
ae5eb026 1086 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1087
1088 rcu_read_lock();
1089
77fdaa12 1090 sta = sta_info_get(local, bssid);
8e268e47
TW		 1091 if (!sta) {
1092 rcu_read_unlock();
1093 return;
1094 }
1095
1096 sta_info_unlink(&sta);
1097
1098 rcu_read_unlock();
1099
1100 sta_info_destroy(sta);
aa458d17 1101}
f0706e82 1102
77fdaa12
JB		 1103static enum rx_mgmt_action __must_check
1104ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1105 struct ieee80211_mgd_work *wk)
f0706e82 1106{
46900298 1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1108 struct ieee80211_local *local = sdata->local;
46900298 1109
77fdaa12
JB		 1110 wk->tries++;
1111 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1112 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1113 " timed out\n",
77fdaa12
JB		 1114 sdata->dev->name, wk->bss->cbss.bssid);
1115
1116 /*
1117 * Most likely AP is not in the range so remove the
1118 * bss struct for that AP.
1119 */
1120 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1121
11432379
HS		 1122 /*
1123 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1124 * due to work needing to be done. Hence, queue the STAs work
1125 * again for that.
11432379
HS		 1126 */
1127 queue_work(local->hw.workqueue, &ifmgd->work);
77fdaa12 1128 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1129 }
1130
77fdaa12
JB		 1131 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1132 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1133 ieee80211_send_assoc(sdata, wk);
1134
1135 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1136 run_again(ifmgd, wk->timeout);
f0706e82 1137
77fdaa12 1138 return RX_MGMT_NONE;
f0706e82
JB		 1139}
1140
3cf335d5
KV		 1141void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1142 struct ieee80211_hdr *hdr)
1143{
1144 /*
1145 * We can postpone the mgd.timer whenever receiving unicast frames
1146 * from AP because we know that the connection is working both ways
1147 * at that time. But multicast frames (and hence also beacons) must
1148 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1149 * data idle periods for sending the periodic probe request to the
1150 * AP we're connected to.
3cf335d5 1151 */
b291ba11
JB		 1152 if (is_multicast_ether_addr(hdr->addr1))
1153 return;
1154
1155 mod_timer(&sdata->u.mgd.conn_mon_timer,
1156 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1157}
f0706e82 1158
b291ba11
JB		 1159static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1160 bool beacon)
04de8381 1161{
04de8381 1162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1163 const u8 *ssid;
b291ba11 1164 bool already = false;
34bfc411 1165
0e2b6286
JB		 1166 if (!netif_running(sdata->dev))
1167 return;
1168
91a3bd76
LR		 1169 if (sdata->local->scanning)
1170 return;
1171
77fdaa12
JB		 1172 mutex_lock(&ifmgd->mtx);
1173
1174 if (!ifmgd->associated)
1175 goto out;
1176
a860402d 1177#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1178 if (beacon && net_ratelimit())
1179 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1180 "- sending probe request\n", sdata->dev->name);
a860402d 1181#endif
04de8381 1182
b291ba11
JB		 1183 /*
1184 * The driver/our work has already reported this event or the
1185 * connection monitoring has kicked in and we have already sent
1186 * a probe request. Or maybe the AP died and the driver keeps
1187 * reporting until we disassociate...
1188 *
1189 * In either case we have to ignore the current call to this
1190 * function (except for setting the correct probe reason bit)
1191 * because otherwise we would reset the timer every time and
1192 * never check whether we received a probe response!
1193 */
1194 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1195 IEEE80211_STA_CONNECTION_POLL))
1196 already = true;
1197
1198 if (beacon)
1199 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1200 else
1201 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1202
1203 if (already)
1204 goto out;
1205
1206 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
4e751843
JB		 1207
1208 mutex_lock(&sdata->local->iflist_mtx);
1209 ieee80211_recalc_ps(sdata->local, -1);
1210 mutex_unlock(&sdata->local->iflist_mtx);
1211
77fdaa12
JB		 1212 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1213 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1214 ssid + 2, ssid[1], NULL, 0);
04de8381 1215
b291ba11
JB		 1216 run_again(ifmgd, ifmgd->probe_timeout);
1217
77fdaa12
JB		 1218 out:
1219 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1220}
1221
b291ba11
JB		 1222void ieee80211_beacon_loss_work(struct work_struct *work)
1223{
1224 struct ieee80211_sub_if_data *sdata =
1225 container_of(work, struct ieee80211_sub_if_data,
1226 u.mgd.beacon_loss_work);
1227
1228 ieee80211_mgd_probe_ap(sdata, true);
1229}
1230
04de8381
KV		 1231void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1232{
1233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1234
1235 queue_work(sdata->local->hw.workqueue,
1236 &sdata->u.mgd.beacon_loss_work);
1237}
1238EXPORT_SYMBOL(ieee80211_beacon_loss);
1239
77fdaa12
JB		 1240static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1241 struct ieee80211_mgd_work *wk)
f0706e82 1242{
77fdaa12 1243 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1244 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1245}
1246
1247
f698d856 1248static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1249 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1250 struct ieee80211_mgmt *mgmt,
1251 size_t len)
1252{
1253 u8 *pos;
1254 struct ieee802_11_elems elems;
1255
f0706e82 1256 pos = mgmt->u.auth.variable;
67a4cce4 1257 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1258 if (!elems.challenge)
f0706e82 1259 return;
77fdaa12 1260 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1261 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1262 wk->bss->cbss.bssid,
1263 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1264 wk->auth_transaction = 4;
fe3d2c3f
JB		 1265}
1266
77fdaa12
JB		 1267static enum rx_mgmt_action __must_check
1268ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1269 struct ieee80211_mgd_work *wk,
1270 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1271{
f0706e82
JB		 1272 u16 auth_alg, auth_transaction, status_code;
1273
77fdaa12
JB		 1274 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1275 return RX_MGMT_NONE;
f0706e82 1276
f4ea83dd 1277 if (len < 24 + 6)
77fdaa12 1278 return RX_MGMT_NONE;
f0706e82 1279
77fdaa12
JB		 1280 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1281 return RX_MGMT_NONE;
f0706e82 1282
77fdaa12
JB		 1283 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1284 return RX_MGMT_NONE;
f0706e82
JB		 1285
1286 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1287 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1288 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1289
77fdaa12
JB		 1290 if (auth_alg != wk->auth_alg ||
1291 auth_transaction != wk->auth_transaction)
1292 return RX_MGMT_NONE;
f0706e82
JB		 1293
1294 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1295 list_del(&wk->list);
1296 kfree(wk);
1297 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1298 }
1299
77fdaa12 1300 switch (wk->auth_alg) {
f0706e82
JB		 1301 case WLAN_AUTH_OPEN:
1302 case WLAN_AUTH_LEAP:
636a5d36 1303 case WLAN_AUTH_FT:
77fdaa12
JB		 1304 ieee80211_auth_completed(sdata, wk);
1305 return RX_MGMT_CFG80211_AUTH;
f0706e82 1306 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1307 if (wk->auth_transaction == 4) {
1308 ieee80211_auth_completed(sdata, wk);
1309 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1310 } else
77fdaa12 1311 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1312 break;
1313 }
77fdaa12
JB		 1314
1315 return RX_MGMT_NONE;
f0706e82
JB		 1316}
1317
1318
77fdaa12
JB		 1319static enum rx_mgmt_action __must_check
1320ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1321 struct ieee80211_mgd_work *wk,
1322 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1323{
46900298 1324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1325 const u8 *bssid = NULL;
f0706e82
JB		 1326 u16 reason_code;
1327
f4ea83dd 1328 if (len < 24 + 2)
77fdaa12 1329 return RX_MGMT_NONE;
f0706e82 1330
77fdaa12
JB		 1331 ASSERT_MGD_MTX(ifmgd);
1332
1333 if (wk)
1334 bssid = wk->bss->cbss.bssid;
1335 else
1336 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1337
1338 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1339
77fdaa12
JB		 1340 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1341 sdata->dev->name, bssid, reason_code);
1342
1343 if (!wk) {
b291ba11 1344 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 1345 } else {
1346 list_del(&wk->list);
1347 kfree(wk);
1348 }
f0706e82 1349
77fdaa12 1350 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1351}
1352
1353
77fdaa12
JB		 1354static enum rx_mgmt_action __must_check
1355ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1356 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1357{
46900298 1358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1359 u16 reason_code;
1360
f4ea83dd 1361 if (len < 24 + 2)
77fdaa12 1362 return RX_MGMT_NONE;
f0706e82 1363
77fdaa12
JB		 1364 ASSERT_MGD_MTX(ifmgd);
1365
1366 if (WARN_ON(!ifmgd->associated))
1367 return RX_MGMT_NONE;
1368
1369 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1370 return RX_MGMT_NONE;
f0706e82
JB		 1371
1372 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1373
77fdaa12
JB		 1374 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1375 sdata->dev->name, reason_code);
f0706e82 1376
b291ba11 1377 ieee80211_set_disassoc(sdata);
77fdaa12 1378 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1379}
1380
1381
77fdaa12
JB		 1382static enum rx_mgmt_action __must_check
1383ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1384 struct ieee80211_mgd_work *wk,
1385 struct ieee80211_mgmt *mgmt, size_t len,
1386 bool reassoc)
f0706e82 1387{
46900298 1388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1389 struct ieee80211_local *local = sdata->local;
8318d78a 1390 struct ieee80211_supported_band *sband;
f0706e82 1391 struct sta_info *sta;
881d948c 1392 u32 rates, basic_rates;
f0706e82
JB		 1393 u16 capab_info, status_code, aid;
1394 struct ieee802_11_elems elems;
bda3933a 1395 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1396 u8 *pos;
ae5eb026 1397 u32 changed = 0;
f0706e82 1398 int i, j;
ddf4ac53 1399 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1400 u16 ap_ht_cap_flags;
f0706e82 1401
77fdaa12
JB		 1402 /*
1403 * AssocResp and ReassocResp have identical structure, so process both
1404 * of them in this function.
1405 */
f0706e82 1406
f4ea83dd 1407 if (len < 24 + 6)
77fdaa12 1408 return RX_MGMT_NONE;
f0706e82 1409
77fdaa12
JB		 1410 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1411 return RX_MGMT_NONE;
f0706e82
JB		 1412
1413 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1414 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1415 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1416
0c68ae26 1417 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1418 "status=%d aid=%d)\n",
0c68ae26 1419 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1420 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1421
63a5ab82
JM		 1422 pos = mgmt->u.assoc_resp.variable;
1423 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1424
1425 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1426 elems.timeout_int && elems.timeout_int_len == 5 &&
1427 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1428 u32 tu, ms;
f797eb7e 1429 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1430 ms = tu * 1024 / 1000;
1431 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1432 "comeback duration %u TU (%u ms)\n",
1433 sdata->dev->name, tu, ms);
77fdaa12 1434 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1435 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1436 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1437 return RX_MGMT_NONE;
63a5ab82
JM		 1438 }
1439
f0706e82
JB		 1440 if (status_code != WLAN_STATUS_SUCCESS) {
1441 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1442 sdata->dev->name, status_code);
77fdaa12
JB		 1443 list_del(&wk->list);
1444 kfree(wk);
1445 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1446 }
1447
1dd84aa2
JB		 1448 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1449 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1450 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1451 aid &= ~(BIT(15) | BIT(14));
1452
f0706e82
JB		 1453 if (!elems.supp_rates) {
1454 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1455 sdata->dev->name);
77fdaa12 1456 return RX_MGMT_NONE;
f0706e82
JB		 1457 }
1458
f698d856 1459 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1460 ifmgd->aid = aid;
f0706e82 1461
d0709a65
JB		 1462 rcu_read_lock();
1463
f0706e82 1464 /* Add STA entry for the AP */
77fdaa12 1465 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1466 if (!sta) {
ddf4ac53 1467 newsta = true;
d0709a65 1468
77fdaa12
JB		 1469 rcu_read_unlock();
1470
1471 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1472 if (!sta) {
1473 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1474 " the AP\n", sdata->dev->name);
77fdaa12 1475 return RX_MGMT_NONE;
f0706e82 1476 }
f709fc69 1477
77fdaa12
JB		 1478 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1479 WLAN_STA_ASSOC_AP);
1480 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1481 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1482
77fdaa12
JB		 1483 rcu_read_lock();
1484 }
05e5e883 1485
60f8b39c
JB		 1486 rates = 0;
1487 basic_rates = 0;
1488 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1489
60f8b39c
JB		 1490 for (i = 0; i < elems.supp_rates_len; i++) {
1491 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1492 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1493
60f8b39c
JB		 1494 if (rate > 110)
1495 have_higher_than_11mbit = true;
1496
1497 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1498 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1499 rates |= BIT(j);
d61272cb
TW		 1500 if (is_basic)
1501 basic_rates |= BIT(j);
1502 break;
1503 }
f709fc69 1504 }
f709fc69
LCC		 1505 }
1506
60f8b39c
JB		 1507 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1508 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1509 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1510
60f8b39c
JB		 1511 if (rate > 110)
1512 have_higher_than_11mbit = true;
f0706e82 1513
60f8b39c 1514 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1515 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1516 rates |= BIT(j);
d61272cb
TW		 1517 if (is_basic)
1518 basic_rates |= BIT(j);
1519 break;
1520 }
60f8b39c 1521 }
1ebebea8 1522 }
f0706e82 1523
323ce79a 1524 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1525 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1526
1527 /* cf. IEEE 802.11 9.2.12 */
1528 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1529 have_higher_than_11mbit)
1530 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1531 else
1532 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1533
ab1faead 1534 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1535 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1536 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1537
1538 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1539
4b7679a5 1540 rate_control_rate_init(sta);
f0706e82 1541
46900298 1542 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1543 set_sta_flags(sta, WLAN_STA_MFP);
1544
ddf4ac53 1545 if (elems.wmm_param)
60f8b39c 1546 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1547
1548 if (newsta) {
1549 int err = sta_info_insert(sta);
1550 if (err) {
1551 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1552 " the AP (error %d)\n", sdata->dev->name, err);
1553 rcu_read_unlock();
77fdaa12 1554 return RX_MGMT_NONE;
ddf4ac53
JB		 1555 }
1556 }
1557
1558 rcu_read_unlock();
1559
1560 if (elems.wmm_param)
46900298 1561 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1562 elems.wmm_param_len);
aa837e1d
JB		 1563 else
1564 ieee80211_set_wmm_default(sdata);
f0706e82 1565
ae5eb026 1566 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1567 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1568 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1569 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1570 wk->bss->cbss.bssid,
ae5eb026
JB		 1571 ap_ht_cap_flags);
1572
60f8b39c
JB		 1573 /* set AID and assoc capability,
1574 * ieee80211_set_associated() will tell the driver */
1575 bss_conf->aid = aid;
1576 bss_conf->assoc_capability = capab_info;
77fdaa12 1577 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1578
15b7b062 1579 /*
b291ba11
JB		 1580 * Start timer to probe the connection to the AP now.
1581 * Also start the timer that will detect beacon loss.
15b7b062 1582 */
b291ba11
JB		 1583 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1584 mod_beacon_timer(sdata);
15b7b062 1585
77fdaa12
JB		 1586 list_del(&wk->list);
1587 kfree(wk);
1588 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1589}
1590
1591
98c8fccf
JB		 1592static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1593 struct ieee80211_mgmt *mgmt,
1594 size_t len,
1595 struct ieee80211_rx_status *rx_status,
1596 struct ieee802_11_elems *elems,
1597 bool beacon)
1598{
1599 struct ieee80211_local *local = sdata->local;
1600 int freq;
c2b13452 1601 struct ieee80211_bss *bss;
98c8fccf 1602 struct ieee80211_channel *channel;
98c8fccf
JB		 1603
1604 if (elems->ds_params && elems->ds_params_len == 1)
1605 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1606 else
1607 freq = rx_status->freq;
1608
1609 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1610
1611 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1612 return;
1613
98c8fccf 1614 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1615 channel, beacon);
77fdaa12
JB		 1616 if (bss)
1617 ieee80211_rx_bss_put(local, bss);
1618
1619 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1620 return;
1621
c481ec97 1622 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1623 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1624 ETH_ALEN) == 0)) {
c481ec97
S		 1625 struct ieee80211_channel_sw_ie *sw_elem =
1626 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1627 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1628 }
f0706e82
JB		 1629}
1630
1631
f698d856 1632static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1633 struct ieee80211_mgd_work *wk,
1634 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1635 struct ieee80211_rx_status *rx_status)
1636{
15b7b062 1637 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1638 size_t baselen;
1639 struct ieee802_11_elems elems;
1640
15b7b062
KV		 1641 ifmgd = &sdata->u.mgd;
1642
77fdaa12
JB		 1643 ASSERT_MGD_MTX(ifmgd);
1644
8e7cdbb6
TW		 1645 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1646 return; /* ignore ProbeResp to foreign address */
1647
ae6a44e3
EK		 1648 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1649 if (baselen > len)
1650 return;
1651
1652 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1653 &elems);
1654
98c8fccf 1655 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1656
1657 /* direct probe may be part of the association flow */
77fdaa12 1658 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1659 printk(KERN_DEBUG "%s direct probe responded\n",
1660 sdata->dev->name);
77fdaa12
JB		 1661 wk->tries = 0;
1662 wk->state = IEEE80211_MGD_STATE_AUTH;
1663 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1664 }
15b7b062 1665
77fdaa12
JB		 1666 if (ifmgd->associated &&
1667 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1668 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1669 IEEE80211_STA_CONNECTION_POLL)) {
1670 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1671 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1672 mutex_lock(&sdata->local->iflist_mtx);
1673 ieee80211_recalc_ps(sdata->local, -1);
1674 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1675 /*
1676 * We've received a probe response, but are not sure whether
1677 * we have or will be receiving any beacons or data, so let's
1678 * schedule the timers again, just in case.
1679 */
1680 mod_beacon_timer(sdata);
1681 mod_timer(&ifmgd->conn_mon_timer,
1682 round_jiffies_up(jiffies +
1683 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1684 }
f0706e82
JB		 1685}
1686
d91f36db
JB		 1687/*
1688 * This is the canonical list of information elements we care about,
1689 * the filter code also gives us all changes to the Microsoft OUI
1690 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1691 *
1692 * We implement beacon filtering in software since that means we can
1693 * avoid processing the frame here and in cfg80211, and userspace
1694 * will not be able to tell whether the hardware supports it or not.
1695 *
1696 * XXX: This list needs to be dynamic -- userspace needs to be able to
1697 * add items it requires. It also needs to be able to tell us to
1698 * look out for other vendor IEs.
1699 */
1700static const u64 care_about_ies =
1d4df3a5
JB		 1701 (1ULL << WLAN_EID_COUNTRY) |
1702 (1ULL << WLAN_EID_ERP_INFO) |
1703 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1704 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1705 (1ULL << WLAN_EID_HT_CAPABILITY) |
1706 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1707
f698d856 1708static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1709 struct ieee80211_mgmt *mgmt,
1710 size_t len,
1711 struct ieee80211_rx_status *rx_status)
1712{
d91f36db 1713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1714 size_t baselen;
1715 struct ieee802_11_elems elems;
f698d856 1716 struct ieee80211_local *local = sdata->local;
471b3efd 1717 u32 changed = 0;
d91f36db 1718 bool erp_valid, directed_tim = false;
7a5158ef 1719 u8 erp_value = 0;
d91f36db 1720 u32 ncrc;
77fdaa12
JB		 1721 u8 *bssid;
1722
1723 ASSERT_MGD_MTX(ifmgd);
f0706e82 1724
ae6a44e3
EK		 1725 /* Process beacon from the current BSS */
1726 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1727 if (baselen > len)
1728 return;
1729
d91f36db 1730 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1731 return;
f0706e82 1732
b291ba11
JB		 1733 /*
1734 * We might have received a number of frames, among them a
1735 * disassoc frame and a beacon...
1736 */
1737 if (!ifmgd->associated)
77fdaa12
JB		 1738 return;
1739
1740 bssid = ifmgd->associated->cbss.bssid;
1741
b291ba11
JB		 1742 /*
1743 * And in theory even frames from a different AP we were just
1744 * associated to a split-second ago!
1745 */
1746 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1747 return;
1748
b291ba11 1749 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1750#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1751 if (net_ratelimit()) {
1752 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1753 "to a received beacon\n", sdata->dev->name);
1754 }
1755#endif
b291ba11 1756 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1757 mutex_lock(&local->iflist_mtx);
1758 ieee80211_recalc_ps(local, -1);
1759 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1760 }
1761
b291ba11
JB		 1762 /*
1763 * Push the beacon loss detection into the future since
1764 * we are processing a beacon from the AP just now.
1765 */
1766 mod_beacon_timer(sdata);
1767
d91f36db
JB		 1768 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1769 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1770 len - baselen, &elems,
1771 care_about_ies, ncrc);
1772
1773 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1774 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1775 ifmgd->aid);
d91f36db 1776
30196673
JM		 1777 if (ncrc != ifmgd->beacon_crc) {
1778 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1779 true);
d91f36db 1780
30196673
JM		 1781 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1782 elems.wmm_param_len);
1783 }
fe3fa827 1784
25c9c875 1785 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1786 if (directed_tim) {
572e0012
KV		 1787 if (local->hw.conf.dynamic_ps_timeout > 0) {
1788 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1789 ieee80211_hw_config(local,
1790 IEEE80211_CONF_CHANGE_PS);
1791 ieee80211_send_nullfunc(local, sdata, 0);
1792 } else {
1793 local->pspolling = true;
1794
1795 /*
1796 * Here is assumed that the driver will be
1797 * able to send ps-poll frame and receive a
1798 * response even though power save mode is
1799 * enabled, but some drivers might require
1800 * to disable power save here. This needs
1801 * to be investigated.
1802 */
1803 ieee80211_send_pspoll(local, sdata);
1804 }
a97b77b9
VN		 1805 }
1806 }
7a5158ef 1807
30196673
JM		 1808 if (ncrc == ifmgd->beacon_crc)
1809 return;
1810 ifmgd->beacon_crc = ncrc;
1811
7a5158ef
JB		 1812 if (elems.erp_info && elems.erp_info_len >= 1) {
1813 erp_valid = true;
1814 erp_value = elems.erp_info[0];
1815 } else {
1816 erp_valid = false;
50c4afb9 1817 }
7a5158ef
JB		 1818 changed |= ieee80211_handle_bss_capability(sdata,
1819 le16_to_cpu(mgmt->u.beacon.capab_info),
1820 erp_valid, erp_value);
f0706e82 1821
d3c990fb 1822
53d6f81c 1823 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1824 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1825 struct sta_info *sta;
1826 struct ieee80211_supported_band *sband;
1827 u16 ap_ht_cap_flags;
1828
1829 rcu_read_lock();
1830
77fdaa12
JB		 1831 sta = sta_info_get(local, bssid);
1832 if (WARN_ON(!sta)) {
ae5eb026
JB		 1833 rcu_read_unlock();
1834 return;
1835 }
1836
1837 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1838
1839 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1840 elems.ht_cap_elem, &sta->sta.ht_cap);
1841
1842 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1843
1844 rcu_read_unlock();
1845
1846 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1847 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1848 }
1849
3f2355cb
LR		 1850 if (elems.country_elem) {
1851 /* Note we are only reviewing this on beacons
1852 * for the BSSID we are associated to */
1853 regulatory_hint_11d(local->hw.wiphy,
1854 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1855
1856 /* TODO: IBSS also needs this */
1857 if (elems.pwr_constr_elem)
1858 ieee80211_handle_pwr_constr(sdata,
1859 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1860 elems.pwr_constr_elem,
1861 elems.pwr_constr_elem_len);
3f2355cb
LR		 1862 }
1863
471b3efd 1864 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1865}
1866
46900298 1867ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1868 struct sk_buff *skb)
f0706e82 1869{
f698d856 1870 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1871 struct ieee80211_mgmt *mgmt;
1872 u16 fc;
1873
1874 if (skb->len < 24)
46900298 1875 return RX_DROP_MONITOR;
f0706e82
JB		 1876
1877 mgmt = (struct ieee80211_mgmt *) skb->data;
1878 fc = le16_to_cpu(mgmt->frame_control);
1879
1880 switch (fc & IEEE80211_FCTL_STYPE) {
1881 case IEEE80211_STYPE_PROBE_REQ:
1882 case IEEE80211_STYPE_PROBE_RESP:
1883 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1884 case IEEE80211_STYPE_AUTH:
1885 case IEEE80211_STYPE_ASSOC_RESP:
1886 case IEEE80211_STYPE_REASSOC_RESP:
1887 case IEEE80211_STYPE_DEAUTH:
1888 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1889 case IEEE80211_STYPE_ACTION:
46900298
JB		 1890 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
1891 queue_work(local->hw.workqueue, &sdata->u.mgd.work);
1892 return RX_QUEUED;
f0706e82
JB		 1893 }
1894
46900298 1895 return RX_DROP_MONITOR;
f0706e82
JB		 1896}
1897
f698d856 1898static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1899 struct sk_buff *skb)
1900{
77fdaa12 1901 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1902 struct ieee80211_rx_status *rx_status;
f0706e82 1903 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1904 struct ieee80211_mgd_work *wk;
1905 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1906 u16 fc;
1907
f0706e82
JB		 1908 rx_status = (struct ieee80211_rx_status *) skb->cb;
1909 mgmt = (struct ieee80211_mgmt *) skb->data;
1910 fc = le16_to_cpu(mgmt->frame_control);
1911
77fdaa12
JB		 1912 mutex_lock(&ifmgd->mtx);
1913
1914 if (ifmgd->associated &&
1915 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1916 ETH_ALEN) == 0) {
1917 switch (fc & IEEE80211_FCTL_STYPE) {
1918 case IEEE80211_STYPE_BEACON:
1919 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1920 rx_status);
1921 break;
1922 case IEEE80211_STYPE_PROBE_RESP:
1923 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1924 skb->len, rx_status);
1925 break;
1926 case IEEE80211_STYPE_DEAUTH:
1927 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1928 mgmt, skb->len);
1929 break;
1930 case IEEE80211_STYPE_DISASSOC:
1931 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1932 break;
1933 case IEEE80211_STYPE_ACTION:
1934 /* XXX: differentiate, can only happen for CSA now! */
1935 ieee80211_sta_process_chanswitch(sdata,
1936 &mgmt->u.action.u.chan_switch.sw_elem,
1937 ifmgd->associated);
1938 break;
1939 }
1940 mutex_unlock(&ifmgd->mtx);
1941
1942 switch (rma) {
1943 case RX_MGMT_NONE:
1944 /* no action */
1945 break;
1946 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1947 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1948 NULL);
77fdaa12
JB		 1949 break;
1950 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1951 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1952 NULL);
77fdaa12
JB		 1953 break;
1954 default:
1955 WARN(1, "unexpected: %d", rma);
1956 }
1957 goto out;
1958 }
1959
1960 list_for_each_entry(wk, &ifmgd->work_list, list) {
1961 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1962 continue;
1963
1964 switch (fc & IEEE80211_FCTL_STYPE) {
1965 case IEEE80211_STYPE_PROBE_RESP:
1966 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1967 rx_status);
1968 break;
1969 case IEEE80211_STYPE_AUTH:
1970 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1971 break;
1972 case IEEE80211_STYPE_ASSOC_RESP:
1973 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1974 skb->len, false);
1975 break;
1976 case IEEE80211_STYPE_REASSOC_RESP:
1977 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1978 skb->len, true);
1979 break;
1980 case IEEE80211_STYPE_DEAUTH:
1981 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1982 skb->len);
1983 break;
1984 }
1985 /*
1986 * We've processed this frame for that work, so it can't
1987 * belong to another work struct.
1988 * NB: this is also required for correctness because the
1989 * called functions can free 'wk', and for 'rma'!
1990 */
46900298 1991 break;
77fdaa12
JB		 1992 }
1993
1994 mutex_unlock(&ifmgd->mtx);
1995
1996 switch (rma) {
1997 case RX_MGMT_NONE:
1998 /* no action */
46900298 1999 break;
77fdaa12 2000 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 2001 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2002 break;
77fdaa12 2003 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2004 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2005 break;
8d8b261a
JB		 2006 case RX_MGMT_CFG80211_DEAUTH:
2007 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2008 break;
77fdaa12
JB		 2009 default:
2010 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2011 }
2012
77fdaa12 2013 out:
f0706e82
JB		 2014 kfree_skb(skb);
2015}
2016
9c6bd790 2017static void ieee80211_sta_timer(unsigned long data)
f0706e82 2018{
60f8b39c
JB		 2019 struct ieee80211_sub_if_data *sdata =
2020 (struct ieee80211_sub_if_data *) data;
46900298 2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2022 struct ieee80211_local *local = sdata->local;
f0706e82 2023
5bb644a0
JB		 2024 if (local->quiescing) {
2025 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2026 return;
2027 }
2028
46900298 2029 queue_work(local->hw.workqueue, &ifmgd->work);
f0706e82
JB		 2030}
2031
9c6bd790
JB		 2032static void ieee80211_sta_work(struct work_struct *work)
2033{
2034 struct ieee80211_sub_if_data *sdata =
46900298 2035 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2036 struct ieee80211_local *local = sdata->local;
46900298 2037 struct ieee80211_if_managed *ifmgd;
9c6bd790 2038 struct sk_buff *skb;
77fdaa12
JB		 2039 struct ieee80211_mgd_work *wk, *tmp;
2040 LIST_HEAD(free_work);
2041 enum rx_mgmt_action rma;
2042 bool anybusy = false;
9c6bd790
JB		 2043
2044 if (!netif_running(sdata->dev))
2045 return;
2046
fbe9c429 2047 if (local->scanning)
9c6bd790
JB		 2048 return;
2049
46900298 2050 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2051 return;
5bb644a0
JB		 2052
2053 /*
2054 * Nothing should have been stuffed into the workqueue during
2055 * the suspend->resume cycle. If this WARN is seen then there
2056 * is a bug with either the driver suspend or something in
2057 * mac80211 stuffing into the workqueue which we haven't yet
2058 * cleared during mac80211's suspend cycle.
2059 */
2060 if (WARN_ON(local->suspended))
2061 return;
2062
46900298 2063 ifmgd = &sdata->u.mgd;
f0706e82 2064
77fdaa12 2065 /* first process frames to avoid timing out while a frame is pending */
46900298 2066 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2067 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2068
77fdaa12
JB		 2069 /* then process the rest of the work */
2070 mutex_lock(&ifmgd->mtx);
2071
b291ba11
JB		 2072 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2073 IEEE80211_STA_CONNECTION_POLL) &&
2074 ifmgd->associated) {
2075 if (time_is_after_jiffies(ifmgd->probe_timeout))
2076 run_again(ifmgd, ifmgd->probe_timeout);
2077 else {
2078 u8 bssid[ETH_ALEN];
2079 /*
2080 * We actually lost the connection ... or did we?
2081 * Let's make sure!
2082 */
2083 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2084 IEEE80211_STA_BEACON_POLL);
2085 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2086 printk(KERN_DEBUG "No probe response from AP %pM"
2087 " after %dms, disconnecting.\n",
2088 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2089 ieee80211_set_disassoc(sdata);
2090 mutex_unlock(&ifmgd->mtx);
2091 /*
2092 * must be outside lock due to cfg80211,
2093 * but that's not a problem.
2094 */
2095 ieee80211_send_deauth_disassoc(sdata, bssid,
2096 IEEE80211_STYPE_DEAUTH,
2097 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2098 NULL);
2099 mutex_lock(&ifmgd->mtx);
2100 }
2101 }
2102
77fdaa12
JB		 2103 list_for_each_entry(wk, &ifmgd->work_list, list) {
2104 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2105 anybusy = true;
2106 break;
2107 }
f0706e82
JB		 2108 }
2109
77fdaa12
JB		 2110 ieee80211_recalc_idle(local);
2111
2112 if (!anybusy) {
2113 mutex_unlock(&ifmgd->mtx);
2114
2115 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
2116 queue_delayed_work(local->hw.workqueue,
2117 &local->scan_work,
2118 round_jiffies_relative(0));
9c6bd790 2119 return;
77fdaa12 2120 }
d6f2da5b 2121
77fdaa12 2122 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2123 if (time_is_after_jiffies(wk->timeout)) {
2124 /*
2125 * This work item isn't supposed to be worked on
2126 * right now, but take care to adjust the timer
2127 * properly.
2128 */
2129 run_again(ifmgd, wk->timeout);
77fdaa12 2130 continue;
ca386f31 2131 }
5cff20e6 2132
77fdaa12
JB		 2133 switch (wk->state) {
2134 default:
2135 WARN_ON(1);
2136 /* fall through */
2137 case IEEE80211_MGD_STATE_IDLE:
2138 /* nothing */
2139 rma = RX_MGMT_NONE;
2140 break;
2141 case IEEE80211_MGD_STATE_PROBE:
2142 rma = ieee80211_direct_probe(sdata, wk);
2143 break;
2144 case IEEE80211_MGD_STATE_AUTH:
2145 rma = ieee80211_authenticate(sdata, wk);
2146 break;
2147 case IEEE80211_MGD_STATE_ASSOC:
2148 rma = ieee80211_associate(sdata, wk);
2149 break;
2150 }
2151
2152 switch (rma) {
2153 case RX_MGMT_NONE:
2154 /* no action required */
2155 break;
2156 case RX_MGMT_CFG80211_AUTH_TO:
2157 case RX_MGMT_CFG80211_ASSOC_TO:
2158 list_del(&wk->list);
2159 list_add(&wk->list, &free_work);
2160 wk->tries = rma; /* small abuse but only local */
2161 break;
2162 default:
2163 WARN(1, "unexpected: %d", rma);
2164 }
2165 }
2166
2167 mutex_unlock(&ifmgd->mtx);
2168
2169 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2170 switch (wk->tries) {
2171 case RX_MGMT_CFG80211_AUTH_TO:
2172 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2173 wk->bss->cbss.bssid);
77fdaa12
JB		 2174 break;
2175 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2176 cfg80211_send_assoc_timeout(sdata->dev,
2177 wk->bss->cbss.bssid);
77fdaa12
JB		 2178 break;
2179 default:
2180 WARN(1, "unexpected: %d", wk->tries);
2181 }
2182
2183 list_del(&wk->list);
2184 kfree(wk);
9c6bd790 2185 }
77fdaa12
JB		 2186
2187 ieee80211_recalc_idle(local);
f0706e82
JB		 2188}
2189
b291ba11
JB		 2190static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2191{
2192 struct ieee80211_sub_if_data *sdata =
2193 (struct ieee80211_sub_if_data *) data;
2194 struct ieee80211_local *local = sdata->local;
2195
2196 if (local->quiescing)
2197 return;
2198
2199 queue_work(sdata->local->hw.workqueue,
2200 &sdata->u.mgd.beacon_loss_work);
2201}
2202
2203static void ieee80211_sta_conn_mon_timer(unsigned long data)
2204{
2205 struct ieee80211_sub_if_data *sdata =
2206 (struct ieee80211_sub_if_data *) data;
2207 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2208 struct ieee80211_local *local = sdata->local;
2209
2210 if (local->quiescing)
2211 return;
2212
2213 queue_work(local->hw.workqueue, &ifmgd->monitor_work);
2214}
2215
2216static void ieee80211_sta_monitor_work(struct work_struct *work)
2217{
2218 struct ieee80211_sub_if_data *sdata =
2219 container_of(work, struct ieee80211_sub_if_data,
2220 u.mgd.monitor_work);
2221
2222 ieee80211_mgd_probe_ap(sdata, false);
2223}
2224
9c6bd790
JB		 2225static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2226{
ad935687 2227 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2228 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2229 IEEE80211_STA_CONNECTION_POLL);
ad935687 2230
b291ba11
JB		 2231 /* let's probe the connection once */
2232 queue_work(sdata->local->hw.workqueue,
2233 &sdata->u.mgd.monitor_work);
2234 /* and do all the other regular work too */
9c6bd790 2235 queue_work(sdata->local->hw.workqueue,
46900298 2236 &sdata->u.mgd.work);
ad935687 2237 }
9c6bd790 2238}
f0706e82 2239
5bb644a0
JB		 2240#ifdef CONFIG_PM
2241void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2242{
2243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2244
2245 /*
2246 * we need to use atomic bitops for the running bits
2247 * only because both timers might fire at the same
2248 * time -- the code here is properly synchronised.
2249 */
2250
2251 cancel_work_sync(&ifmgd->work);
2252 cancel_work_sync(&ifmgd->beacon_loss_work);
2253 if (del_timer_sync(&ifmgd->timer))
2254 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2255
2256 cancel_work_sync(&ifmgd->chswitch_work);
2257 if (del_timer_sync(&ifmgd->chswitch_timer))
2258 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2259
2260 cancel_work_sync(&ifmgd->monitor_work);
2261 /* these will just be re-established on connection */
2262 del_timer_sync(&ifmgd->conn_mon_timer);
2263 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2264}
2265
2266void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2267{
2268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2269
2270 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2271 add_timer(&ifmgd->timer);
2272 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2273 add_timer(&ifmgd->chswitch_timer);
2274}
2275#endif
2276
9c6bd790
JB		 2277/* interface setup */
2278void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2279{
46900298 2280 struct ieee80211_if_managed *ifmgd;
988c0f72 2281
46900298
JB		 2282 ifmgd = &sdata->u.mgd;
2283 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2284 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2285 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2286 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2287 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2288 (unsigned long) sdata);
b291ba11
JB		 2289 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2290 (unsigned long) sdata);
2291 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2292 (unsigned long) sdata);
46900298 2293 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2294 (unsigned long) sdata);
46900298 2295 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2296
77fdaa12
JB		 2297 INIT_LIST_HEAD(&ifmgd->work_list);
2298
46900298 2299 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2300 ifmgd->flags = 0;
176be728 2301 if (sdata->local->hw.queues >= 4)
46900298 2302 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2303
77fdaa12 2304 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2305}
2306
77fdaa12
JB		 2307/* scan finished notification */
2308void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2309{
77fdaa12 2310 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2311
77fdaa12
JB		 2312 /* Restart STA timers */
2313 rcu_read_lock();
2314 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2315 ieee80211_restart_sta_timer(sdata);
2316 rcu_read_unlock();
2317}
60f8b39c 2318
77fdaa12
JB		 2319int ieee80211_max_network_latency(struct notifier_block *nb,
2320 unsigned long data, void *dummy)
2321{
2322 s32 latency_usec = (s32) data;
2323 struct ieee80211_local *local =
2324 container_of(nb, struct ieee80211_local,
2325 network_latency_notifier);
1fa6f4af 2326
77fdaa12
JB		 2327 mutex_lock(&local->iflist_mtx);
2328 ieee80211_recalc_ps(local, latency_usec);
2329 mutex_unlock(&local->iflist_mtx);
dfe67012 2330
77fdaa12 2331 return 0;
9c6bd790
JB		 2332}
2333
77fdaa12
JB		 2334/* config hooks */
2335int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2336 struct cfg80211_auth_request *req)
9c6bd790 2337{
46900298 2338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2339 const u8 *ssid;
2340 struct ieee80211_mgd_work *wk;
2341 u16 auth_alg;
9c6bd790 2342
77fdaa12
JB		 2343 switch (req->auth_type) {
2344 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2345 auth_alg = WLAN_AUTH_OPEN;
2346 break;
2347 case NL80211_AUTHTYPE_SHARED_KEY:
2348 auth_alg = WLAN_AUTH_SHARED_KEY;
2349 break;
2350 case NL80211_AUTHTYPE_FT:
2351 auth_alg = WLAN_AUTH_FT;
2352 break;
2353 case NL80211_AUTHTYPE_NETWORK_EAP:
2354 auth_alg = WLAN_AUTH_LEAP;
2355 break;
2356 default:
2357 return -EOPNOTSUPP;
60f8b39c 2358 }
77fdaa12
JB		 2359
2360 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2361 if (!wk)
9c6bd790 2362 return -ENOMEM;
77fdaa12
JB		 2363
2364 wk->bss = (void *)req->bss;
2365
2366 if (req->ie && req->ie_len) {
2367 memcpy(wk->ie, req->ie, req->ie_len);
2368 wk->ie_len = req->ie_len;
9c6bd790 2369 }
77fdaa12 2370
fffd0934
JB		 2371 if (req->key && req->key_len) {
2372 wk->key_len = req->key_len;
2373 wk->key_idx = req->key_idx;
2374 memcpy(wk->key, req->key, req->key_len);
2375 }
2376
77fdaa12
JB		 2377 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2378 memcpy(wk->ssid, ssid + 2, ssid[1]);
2379 wk->ssid_len = ssid[1];
2380
2381 wk->state = IEEE80211_MGD_STATE_PROBE;
2382 wk->auth_alg = auth_alg;
48531847 2383 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2384
2385 /*
2386 * XXX: if still associated need to tell AP that we're going
2387 * to sleep and then change channel etc.
2388 */
2389 sdata->local->oper_channel = req->bss->channel;
2390 ieee80211_hw_config(sdata->local, 0);
2391
2392 mutex_lock(&ifmgd->mtx);
2393 list_add(&wk->list, &sdata->u.mgd.work_list);
2394 mutex_unlock(&ifmgd->mtx);
2395
2396 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
9c6bd790 2397 return 0;
60f8b39c
JB		 2398}
2399
77fdaa12
JB		 2400int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2401 struct cfg80211_assoc_request *req)
f0706e82 2402{
77fdaa12
JB		 2403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2404 struct ieee80211_mgd_work *wk, *found = NULL;
2405 int i, err;
f0706e82 2406
77fdaa12
JB		 2407 mutex_lock(&ifmgd->mtx);
2408
2409 list_for_each_entry(wk, &ifmgd->work_list, list) {
2410 if (&wk->bss->cbss == req->bss &&
2411 wk->state == IEEE80211_MGD_STATE_IDLE) {
2412 found = wk;
2413 break;
2414 }
2415 }
2416
2417 if (!found) {
2418 err = -ENOLINK;
2419 goto out;
2420 }
2421
2422 list_del(&found->list);
2423
2424 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2425 if (!wk) {
2426 list_add(&found->list, &ifmgd->work_list);
2427 err = -ENOMEM;
2428 goto out;
2429 }
2430
2431 list_add(&wk->list, &ifmgd->work_list);
2432
2433 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2434
2435 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2436 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2437 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2438 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2439 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2440
2441 sdata->local->oper_channel = req->bss->channel;
2442 ieee80211_hw_config(sdata->local, 0);
2443
2444 if (req->ie && req->ie_len) {
2445 memcpy(wk->ie, req->ie, req->ie_len);
2446 wk->ie_len = req->ie_len;
2447 } else
2448 wk->ie_len = 0;
2449
2450 if (req->prev_bssid)
2451 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2452
2453 wk->state = IEEE80211_MGD_STATE_ASSOC;
2454 wk->tries = 0;
48531847 2455 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2456
2457 if (req->use_mfp) {
2458 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2459 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2460 } else {
2461 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2462 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2463 }
2464
2465 if (req->crypto.control_port)
2466 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2467 else
2468 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2469
2470 queue_work(sdata->local->hw.workqueue, &sdata->u.mgd.work);
2471
2472 err = 0;
2473
2474 out:
2475 mutex_unlock(&ifmgd->mtx);
2476 return err;
f0706e82
JB		 2477}
2478
77fdaa12 2479int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2480 struct cfg80211_deauth_request *req,
2481 void *cookie)
f0706e82 2482{
46900298 2483 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2484 struct ieee80211_mgd_work *wk;
2485 const u8 *bssid = NULL;
f0706e82 2486
77fdaa12
JB		 2487 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2488 sdata->dev->name, req->reason_code);
2489
2490 mutex_lock(&ifmgd->mtx);
2491
2492 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2493 bssid = req->bss->bssid;
b291ba11 2494 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2495 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2496 if (&wk->bss->cbss == req->bss) {
2497 bssid = req->bss->bssid;
2498 list_del(&wk->list);
2499 kfree(wk);
2500 break;
2501 }
2502 }
f0706e82 2503
8d8b261a
JB		 2504 /*
2505 * cfg80211 should catch this ... but it's racy since
2506 * we can receive a deauth frame, process it, hand it
2507 * to cfg80211 while that's in a locked section already
2508 * trying to tell us that the user wants to disconnect.
2509 */
2510 if (!bssid) {
77fdaa12 2511 mutex_unlock(&ifmgd->mtx);
46900298 2512 return -ENOLINK;
77fdaa12
JB		 2513 }
2514
2515 mutex_unlock(&ifmgd->mtx);
2516
2517 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2518 IEEE80211_STYPE_DEAUTH, req->reason_code,
2519 cookie);
f0706e82 2520
f0706e82
JB		 2521 return 0;
2522}
84363e6e 2523
77fdaa12 2524int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2525 struct cfg80211_disassoc_request *req,
2526 void *cookie)
9c6bd790 2527{
77fdaa12 2528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2529
77fdaa12
JB		 2530 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2531 sdata->dev->name, req->reason_code);
10f644a4 2532
77fdaa12 2533 mutex_lock(&ifmgd->mtx);
10f644a4 2534
8d8b261a
JB		 2535 /*
2536 * cfg80211 should catch this ... but it's racy since
2537 * we can receive a disassoc frame, process it, hand it
2538 * to cfg80211 while that's in a locked section already
2539 * trying to tell us that the user wants to disconnect.
2540 */
2541 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2542 mutex_unlock(&ifmgd->mtx);
2543 return -ENOLINK;
2544 }
2545
b291ba11 2546 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2547
2548 mutex_unlock(&ifmgd->mtx);
10f644a4 2549
77fdaa12 2550 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2551 IEEE80211_STYPE_DISASSOC, req->reason_code,
2552 cookie);
10f644a4
JB		 2553 return 0;
2554}
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