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cfg80211: decouple regulatory variables from cfg80211_mutex
[net-next-2.6.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
42935eca 568 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 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) {
42935eca 600 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 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
42935eca 766 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 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
056508dc
JB		 919 mutex_lock(&local->iflist_mtx);
920 ieee80211_recalc_ps(local, -1);
921 mutex_unlock(&local->iflist_mtx);
e0cb686f 922
9ac19a90
JB		 923 netif_tx_start_all_queues(sdata->dev);
924 netif_carrier_on(sdata->dev);
f0706e82
JB		 925}
926
77fdaa12
JB		 927static enum rx_mgmt_action __must_check
928ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
929 struct ieee80211_mgd_work *wk)
f0706e82 930{
46900298 931 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 932 struct ieee80211_local *local = sdata->local;
46900298 933
77fdaa12
JB		 934 wk->tries++;
935 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 936 printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n",
77fdaa12 937 sdata->dev->name, wk->bss->cbss.bssid);
7a947080
VT		 938
939 /*
940 * Most likely AP is not in the range so remove the
77fdaa12 941 * bss struct for that AP.
7a947080 942 */
77fdaa12 943 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 944
945 /*
946 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 947 * due to work needing to be done. Hence, queue the STAs work
948 * again for that.
11432379 949 */
42935eca 950 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 951 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 952 }
f0706e82 953
77fdaa12
JB		 954 printk(KERN_DEBUG "%s: direct probe to AP %pM (try %d)\n",
955 sdata->dev->name, wk->bss->cbss.bssid,
956 wk->tries);
f0706e82 957
77fdaa12
JB		 958 /*
959 * Direct probe is sent to broadcast address as some APs
9ac19a90
JB		 960 * will not answer to direct packet in unassociated state.
961 */
77fdaa12
JB		 962 ieee80211_send_probe_req(sdata, NULL, wk->ssid, wk->ssid_len, NULL, 0);
963
964 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 965 run_again(ifmgd, wk->timeout);
9ac19a90 966
77fdaa12 967 return RX_MGMT_NONE;
60f8b39c 968}
f0706e82 969
9ac19a90 970
77fdaa12
JB		 971static enum rx_mgmt_action __must_check
972ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
973 struct ieee80211_mgd_work *wk)
f0706e82 974{
46900298 975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 976 struct ieee80211_local *local = sdata->local;
46900298 977
77fdaa12
JB		 978 wk->tries++;
979 if (wk->tries > IEEE80211_AUTH_MAX_TRIES) {
0c68ae26 980 printk(KERN_DEBUG "%s: authentication with AP %pM"
9ac19a90 981 " timed out\n",
77fdaa12
JB		 982 sdata->dev->name, wk->bss->cbss.bssid);
983
984 /*
985 * Most likely AP is not in the range so remove the
986 * bss struct for that AP.
987 */
988 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
11432379
HS		 989
990 /*
991 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 992 * due to work needing to be done. Hence, queue the STAs work
993 * again for that.
11432379 994 */
42935eca 995 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 996 return RX_MGMT_CFG80211_AUTH_TO;
f0706e82 997 }
f0706e82 998
77fdaa12
JB		 999 printk(KERN_DEBUG "%s: authenticate with AP %pM (try %d)\n",
1000 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1001
1002 ieee80211_send_auth(sdata, 1, wk->auth_alg, wk->ie, wk->ie_len,
fffd0934 1003 wk->bss->cbss.bssid, NULL, 0, 0);
77fdaa12 1004 wk->auth_transaction = 2;
f0706e82 1005
77fdaa12 1006 wk->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
ca386f31 1007 run_again(ifmgd, wk->timeout);
9ac19a90 1008
77fdaa12 1009 return RX_MGMT_NONE;
f0706e82
JB		 1010}
1011
b291ba11 1012static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
aa458d17 1013{
46900298 1014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1015 struct ieee80211_local *local = sdata->local;
1016 struct sta_info *sta;
e0cb686f 1017 u32 changed = 0, config_changed = 0;
b291ba11 1018 u8 bssid[ETH_ALEN];
aa458d17 1019
77fdaa12
JB		 1020 ASSERT_MGD_MTX(ifmgd);
1021
b291ba11
JB		 1022 if (WARN_ON(!ifmgd->associated))
1023 return;
1024
1025 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
1026
77fdaa12
JB		 1027 ifmgd->associated = NULL;
1028 memset(ifmgd->bssid, 0, ETH_ALEN);
1029
1030 /*
1031 * we need to commit the associated = NULL change because the
1032 * scan code uses that to determine whether this iface should
1033 * go to/wake up from powersave or not -- and could otherwise
1034 * wake the queues erroneously.
1035 */
1036 smp_mb();
1037
1038 /*
1039 * Thus, we can only afterwards stop the queues -- to account
1040 * for the case where another CPU is finishing a scan at this
1041 * time -- we don't want the scan code to enable queues.
1042 */
aa458d17 1043
24e64622 1044 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1045 netif_carrier_off(sdata->dev);
1046
1fa6f4af 1047 rcu_read_lock();
77fdaa12 1048 sta = sta_info_get(local, bssid);
1fa6f4af
JB		 1049 if (sta)
1050 ieee80211_sta_tear_down_BA_sessions(sta);
1051 rcu_read_unlock();
aa458d17 1052
f5e5bf25
TW		 1053 changed |= ieee80211_reset_erp_info(sdata);
1054
f5e5bf25 1055 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1056 changed |= BSS_CHANGED_ASSOC;
1057 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1058
aa837e1d
JB		 1059 ieee80211_set_wmm_default(sdata);
1060
5cff20e6
JB		 1061 ieee80211_recalc_idle(local);
1062
4797938c 1063 /* channel(_type) changes are handled by ieee80211_hw_config */
094d05dc 1064 local->oper_channel_type = NL80211_CHAN_NO_HT;
e0cb686f 1065
413ad50a
JB		 1066 /* on the next assoc, re-program HT parameters */
1067 sdata->ht_opmode_valid = false;
1068
a8302de9
VT		 1069 local->power_constr_level = 0;
1070
520eb820
KV		 1071 del_timer_sync(&local->dynamic_ps_timer);
1072 cancel_work_sync(&local->dynamic_ps_enable_work);
1073
e0cb686f
KV		 1074 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1075 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1076 config_changed |= IEEE80211_CONF_CHANGE_PS;
1077 }
ae5eb026 1078
e0cb686f 1079 ieee80211_hw_config(local, config_changed);
9cef8737
JB		 1080
1081 /* And the BSSID changed -- not very interesting here */
1082 changed |= BSS_CHANGED_BSSID;
ae5eb026 1083 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47
TW		 1084
1085 rcu_read_lock();
1086
77fdaa12 1087 sta = sta_info_get(local, bssid);
8e268e47
TW		 1088 if (!sta) {
1089 rcu_read_unlock();
1090 return;
1091 }
1092
1093 sta_info_unlink(&sta);
1094
1095 rcu_read_unlock();
1096
1097 sta_info_destroy(sta);
aa458d17 1098}
f0706e82 1099
77fdaa12
JB		 1100static enum rx_mgmt_action __must_check
1101ieee80211_associate(struct ieee80211_sub_if_data *sdata,
1102 struct ieee80211_mgd_work *wk)
f0706e82 1103{
46900298 1104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
11432379 1105 struct ieee80211_local *local = sdata->local;
46900298 1106
77fdaa12
JB		 1107 wk->tries++;
1108 if (wk->tries > IEEE80211_ASSOC_MAX_TRIES) {
0c68ae26 1109 printk(KERN_DEBUG "%s: association with AP %pM"
f0706e82 1110 " timed out\n",
77fdaa12
JB		 1111 sdata->dev->name, wk->bss->cbss.bssid);
1112
1113 /*
1114 * Most likely AP is not in the range so remove the
1115 * bss struct for that AP.
1116 */
1117 cfg80211_unlink_bss(local->hw.wiphy, &wk->bss->cbss);
1118
11432379
HS		 1119 /*
1120 * We might have a pending scan which had no chance to run yet
77fdaa12
JB		 1121 * due to work needing to be done. Hence, queue the STAs work
1122 * again for that.
11432379 1123 */
42935eca 1124 ieee80211_queue_work(&local->hw, &ifmgd->work);
77fdaa12 1125 return RX_MGMT_CFG80211_ASSOC_TO;
f0706e82
JB		 1126 }
1127
77fdaa12
JB		 1128 printk(KERN_DEBUG "%s: associate with AP %pM (try %d)\n",
1129 sdata->dev->name, wk->bss->cbss.bssid, wk->tries);
1130 ieee80211_send_assoc(sdata, wk);
1131
1132 wk->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
ca386f31 1133 run_again(ifmgd, wk->timeout);
f0706e82 1134
77fdaa12 1135 return RX_MGMT_NONE;
f0706e82
JB		 1136}
1137
3cf335d5
KV		 1138void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1139 struct ieee80211_hdr *hdr)
1140{
1141 /*
1142 * We can postpone the mgd.timer whenever receiving unicast frames
1143 * from AP because we know that the connection is working both ways
1144 * at that time. But multicast frames (and hence also beacons) must
1145 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1146 * data idle periods for sending the periodic probe request to the
1147 * AP we're connected to.
3cf335d5 1148 */
b291ba11
JB		 1149 if (is_multicast_ether_addr(hdr->addr1))
1150 return;
1151
1152 mod_timer(&sdata->u.mgd.conn_mon_timer,
1153 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
3cf335d5 1154}
f0706e82 1155
b291ba11
JB		 1156static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1157 bool beacon)
04de8381 1158{
04de8381 1159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1160 const u8 *ssid;
b291ba11 1161 bool already = false;
34bfc411 1162
0e2b6286
JB		 1163 if (!netif_running(sdata->dev))
1164 return;
1165
91a3bd76
LR		 1166 if (sdata->local->scanning)
1167 return;
1168
77fdaa12
JB		 1169 mutex_lock(&ifmgd->mtx);
1170
1171 if (!ifmgd->associated)
1172 goto out;
1173
a860402d 1174#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b291ba11
JB		 1175 if (beacon && net_ratelimit())
1176 printk(KERN_DEBUG "%s: detected beacon loss from AP "
77fdaa12 1177 "- sending probe request\n", sdata->dev->name);
a860402d 1178#endif
04de8381 1179
b291ba11
JB		 1180 /*
1181 * The driver/our work has already reported this event or the
1182 * connection monitoring has kicked in and we have already sent
1183 * a probe request. Or maybe the AP died and the driver keeps
1184 * reporting until we disassociate...
1185 *
1186 * In either case we have to ignore the current call to this
1187 * function (except for setting the correct probe reason bit)
1188 * because otherwise we would reset the timer every time and
1189 * never check whether we received a probe response!
1190 */
1191 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1192 IEEE80211_STA_CONNECTION_POLL))
1193 already = true;
1194
1195 if (beacon)
1196 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1197 else
1198 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1199
1200 if (already)
1201 goto out;
1202
1203 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
4e751843
JB		 1204
1205 mutex_lock(&sdata->local->iflist_mtx);
1206 ieee80211_recalc_ps(sdata->local, -1);
1207 mutex_unlock(&sdata->local->iflist_mtx);
1208
77fdaa12
JB		 1209 ssid = ieee80211_bss_get_ie(&ifmgd->associated->cbss, WLAN_EID_SSID);
1210 ieee80211_send_probe_req(sdata, ifmgd->associated->cbss.bssid,
1211 ssid + 2, ssid[1], NULL, 0);
04de8381 1212
b291ba11
JB		 1213 run_again(ifmgd, ifmgd->probe_timeout);
1214
77fdaa12
JB		 1215 out:
1216 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1217}
1218
b291ba11
JB		 1219void ieee80211_beacon_loss_work(struct work_struct *work)
1220{
1221 struct ieee80211_sub_if_data *sdata =
1222 container_of(work, struct ieee80211_sub_if_data,
1223 u.mgd.beacon_loss_work);
1224
1225 ieee80211_mgd_probe_ap(sdata, true);
1226}
1227
04de8381
KV		 1228void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1229{
1230 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1231
42935eca 1232 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
04de8381
KV		 1233}
1234EXPORT_SYMBOL(ieee80211_beacon_loss);
1235
77fdaa12
JB		 1236static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
1237 struct ieee80211_mgd_work *wk)
f0706e82 1238{
77fdaa12 1239 wk->state = IEEE80211_MGD_STATE_IDLE;
f698d856 1240 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
f0706e82
JB		 1241}
1242
1243
f698d856 1244static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
77fdaa12 1245 struct ieee80211_mgd_work *wk,
f0706e82
JB		 1246 struct ieee80211_mgmt *mgmt,
1247 size_t len)
1248{
1249 u8 *pos;
1250 struct ieee802_11_elems elems;
1251
f0706e82 1252 pos = mgmt->u.auth.variable;
67a4cce4 1253 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1254 if (!elems.challenge)
f0706e82 1255 return;
77fdaa12 1256 ieee80211_send_auth(sdata, 3, wk->auth_alg,
46900298 1257 elems.challenge - 2, elems.challenge_len + 2,
fffd0934
JB		 1258 wk->bss->cbss.bssid,
1259 wk->key, wk->key_len, wk->key_idx);
77fdaa12 1260 wk->auth_transaction = 4;
fe3d2c3f
JB		 1261}
1262
77fdaa12
JB		 1263static enum rx_mgmt_action __must_check
1264ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1265 struct ieee80211_mgd_work *wk,
1266 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1267{
f0706e82
JB		 1268 u16 auth_alg, auth_transaction, status_code;
1269
77fdaa12
JB		 1270 if (wk->state != IEEE80211_MGD_STATE_AUTH)
1271 return RX_MGMT_NONE;
f0706e82 1272
f4ea83dd 1273 if (len < 24 + 6)
77fdaa12 1274 return RX_MGMT_NONE;
f0706e82 1275
77fdaa12
JB		 1276 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1277 return RX_MGMT_NONE;
f0706e82 1278
77fdaa12
JB		 1279 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1280 return RX_MGMT_NONE;
f0706e82
JB		 1281
1282 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1283 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1284 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1285
77fdaa12
JB		 1286 if (auth_alg != wk->auth_alg ||
1287 auth_transaction != wk->auth_transaction)
1288 return RX_MGMT_NONE;
f0706e82
JB		 1289
1290 if (status_code != WLAN_STATUS_SUCCESS) {
77fdaa12
JB		 1291 list_del(&wk->list);
1292 kfree(wk);
1293 return RX_MGMT_CFG80211_AUTH;
f0706e82
JB		 1294 }
1295
77fdaa12 1296 switch (wk->auth_alg) {
f0706e82
JB		 1297 case WLAN_AUTH_OPEN:
1298 case WLAN_AUTH_LEAP:
636a5d36 1299 case WLAN_AUTH_FT:
77fdaa12
JB		 1300 ieee80211_auth_completed(sdata, wk);
1301 return RX_MGMT_CFG80211_AUTH;
f0706e82 1302 case WLAN_AUTH_SHARED_KEY:
77fdaa12
JB		 1303 if (wk->auth_transaction == 4) {
1304 ieee80211_auth_completed(sdata, wk);
1305 return RX_MGMT_CFG80211_AUTH;
6039f6d2 1306 } else
77fdaa12 1307 ieee80211_auth_challenge(sdata, wk, mgmt, len);
f0706e82
JB		 1308 break;
1309 }
77fdaa12
JB		 1310
1311 return RX_MGMT_NONE;
f0706e82
JB		 1312}
1313
1314
77fdaa12
JB		 1315static enum rx_mgmt_action __must_check
1316ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
1317 struct ieee80211_mgd_work *wk,
1318 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1319{
46900298 1320 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1321 const u8 *bssid = NULL;
f0706e82
JB		 1322 u16 reason_code;
1323
f4ea83dd 1324 if (len < 24 + 2)
77fdaa12 1325 return RX_MGMT_NONE;
f0706e82 1326
77fdaa12
JB		 1327 ASSERT_MGD_MTX(ifmgd);
1328
1329 if (wk)
1330 bssid = wk->bss->cbss.bssid;
1331 else
1332 bssid = ifmgd->associated->cbss.bssid;
f0706e82
JB		 1333
1334 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1335
77fdaa12
JB		 1336 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
1337 sdata->dev->name, bssid, reason_code);
1338
1339 if (!wk) {
b291ba11 1340 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 1341 } else {
1342 list_del(&wk->list);
1343 kfree(wk);
1344 }
f0706e82 1345
77fdaa12 1346 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1347}
1348
1349
77fdaa12
JB		 1350static enum rx_mgmt_action __must_check
1351ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1352 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1353{
46900298 1354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1355 u16 reason_code;
1356
f4ea83dd 1357 if (len < 24 + 2)
77fdaa12 1358 return RX_MGMT_NONE;
f0706e82 1359
77fdaa12
JB		 1360 ASSERT_MGD_MTX(ifmgd);
1361
1362 if (WARN_ON(!ifmgd->associated))
1363 return RX_MGMT_NONE;
1364
1365 if (WARN_ON(memcmp(ifmgd->associated->cbss.bssid, mgmt->sa, ETH_ALEN)))
1366 return RX_MGMT_NONE;
f0706e82
JB		 1367
1368 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1369
77fdaa12
JB		 1370 printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n",
1371 sdata->dev->name, reason_code);
f0706e82 1372
b291ba11 1373 ieee80211_set_disassoc(sdata);
77fdaa12 1374 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1375}
1376
1377
77fdaa12
JB		 1378static enum rx_mgmt_action __must_check
1379ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1380 struct ieee80211_mgd_work *wk,
1381 struct ieee80211_mgmt *mgmt, size_t len,
1382 bool reassoc)
f0706e82 1383{
46900298 1384 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1385 struct ieee80211_local *local = sdata->local;
8318d78a 1386 struct ieee80211_supported_band *sband;
f0706e82 1387 struct sta_info *sta;
881d948c 1388 u32 rates, basic_rates;
f0706e82
JB		 1389 u16 capab_info, status_code, aid;
1390 struct ieee802_11_elems elems;
bda3933a 1391 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82 1392 u8 *pos;
ae5eb026 1393 u32 changed = 0;
f0706e82 1394 int i, j;
ddf4ac53 1395 bool have_higher_than_11mbit = false, newsta = false;
ae5eb026 1396 u16 ap_ht_cap_flags;
f0706e82 1397
77fdaa12
JB		 1398 /*
1399 * AssocResp and ReassocResp have identical structure, so process both
1400 * of them in this function.
1401 */
f0706e82 1402
f4ea83dd 1403 if (len < 24 + 6)
77fdaa12 1404 return RX_MGMT_NONE;
f0706e82 1405
77fdaa12
JB		 1406 if (memcmp(wk->bss->cbss.bssid, mgmt->sa, ETH_ALEN) != 0)
1407 return RX_MGMT_NONE;
f0706e82
JB		 1408
1409 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1410 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1411 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1412
0c68ae26 1413 printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x "
f0706e82 1414 "status=%d aid=%d)\n",
0c68ae26 1415 sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa,
ddd68587 1416 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82 1417
63a5ab82
JM		 1418 pos = mgmt->u.assoc_resp.variable;
1419 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1420
1421 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
f797eb7e
JM		 1422 elems.timeout_int && elems.timeout_int_len == 5 &&
1423 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
63a5ab82 1424 u32 tu, ms;
f797eb7e 1425 tu = get_unaligned_le32(elems.timeout_int + 1);
63a5ab82
JM		 1426 ms = tu * 1024 / 1000;
1427 printk(KERN_DEBUG "%s: AP rejected association temporarily; "
1428 "comeback duration %u TU (%u ms)\n",
1429 sdata->dev->name, tu, ms);
77fdaa12 1430 wk->timeout = jiffies + msecs_to_jiffies(ms);
63a5ab82 1431 if (ms > IEEE80211_ASSOC_TIMEOUT)
ca386f31 1432 run_again(ifmgd, jiffies + msecs_to_jiffies(ms));
77fdaa12 1433 return RX_MGMT_NONE;
63a5ab82
JM		 1434 }
1435
f0706e82
JB		 1436 if (status_code != WLAN_STATUS_SUCCESS) {
1437 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 1438 sdata->dev->name, status_code);
77fdaa12
JB		 1439 list_del(&wk->list);
1440 kfree(wk);
1441 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1442 }
1443
1dd84aa2
JB		 1444 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1445 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 1446 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 1447 aid &= ~(BIT(15) | BIT(14));
1448
f0706e82
JB		 1449 if (!elems.supp_rates) {
1450 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 1451 sdata->dev->name);
77fdaa12 1452 return RX_MGMT_NONE;
f0706e82
JB		 1453 }
1454
f698d856 1455 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
46900298 1456 ifmgd->aid = aid;
f0706e82 1457
d0709a65
JB		 1458 rcu_read_lock();
1459
f0706e82 1460 /* Add STA entry for the AP */
77fdaa12 1461 sta = sta_info_get(local, wk->bss->cbss.bssid);
f0706e82 1462 if (!sta) {
ddf4ac53 1463 newsta = true;
d0709a65 1464
77fdaa12
JB		 1465 rcu_read_unlock();
1466
1467 sta = sta_info_alloc(sdata, wk->bss->cbss.bssid, GFP_KERNEL);
73651ee6
JB		 1468 if (!sta) {
1469 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 1470 " the AP\n", sdata->dev->name);
77fdaa12 1471 return RX_MGMT_NONE;
f0706e82 1472 }
f709fc69 1473
77fdaa12
JB		 1474 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1475 WLAN_STA_ASSOC_AP);
1476 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1477 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
f709fc69 1478
77fdaa12
JB		 1479 rcu_read_lock();
1480 }
05e5e883 1481
60f8b39c
JB		 1482 rates = 0;
1483 basic_rates = 0;
1484 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 1485
60f8b39c
JB		 1486 for (i = 0; i < elems.supp_rates_len; i++) {
1487 int rate = (elems.supp_rates[i] & 0x7f) * 5;
d61272cb 1488 bool is_basic = !!(elems.supp_rates[i] & 0x80);
f709fc69 1489
60f8b39c
JB		 1490 if (rate > 110)
1491 have_higher_than_11mbit = true;
1492
1493 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1494 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1495 rates |= BIT(j);
d61272cb
TW		 1496 if (is_basic)
1497 basic_rates |= BIT(j);
1498 break;
1499 }
f709fc69 1500 }
f709fc69
LCC		 1501 }
1502
60f8b39c
JB		 1503 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1504 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
7e0986c1 1505 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
f0706e82 1506
60f8b39c
JB		 1507 if (rate > 110)
1508 have_higher_than_11mbit = true;
f0706e82 1509
60f8b39c 1510 for (j = 0; j < sband->n_bitrates; j++) {
d61272cb 1511 if (sband->bitrates[j].bitrate == rate) {
60f8b39c 1512 rates |= BIT(j);
d61272cb
TW		 1513 if (is_basic)
1514 basic_rates |= BIT(j);
1515 break;
1516 }
60f8b39c 1517 }
1ebebea8 1518 }
f0706e82 1519
323ce79a 1520 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
bda3933a 1521 sdata->vif.bss_conf.basic_rates = basic_rates;
60f8b39c
JB		 1522
1523 /* cf. IEEE 802.11 9.2.12 */
1524 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1525 have_higher_than_11mbit)
1526 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1527 else
1528 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1529
ab1faead 1530 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1531 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
d9fe60de 1532 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026
JB		 1533
1534 ap_ht_cap_flags = sta->sta.ht_cap.cap;
f0706e82 1535
4b7679a5 1536 rate_control_rate_init(sta);
f0706e82 1537
46900298 1538 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
5394af4d
JM		 1539 set_sta_flags(sta, WLAN_STA_MFP);
1540
ddf4ac53 1541 if (elems.wmm_param)
60f8b39c 1542 set_sta_flags(sta, WLAN_STA_WME);
ddf4ac53
JB		 1543
1544 if (newsta) {
1545 int err = sta_info_insert(sta);
1546 if (err) {
1547 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1548 " the AP (error %d)\n", sdata->dev->name, err);
1549 rcu_read_unlock();
77fdaa12 1550 return RX_MGMT_NONE;
ddf4ac53
JB		 1551 }
1552 }
1553
1554 rcu_read_unlock();
1555
1556 if (elems.wmm_param)
46900298 1557 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
60f8b39c 1558 elems.wmm_param_len);
aa837e1d
JB		 1559 else
1560 ieee80211_set_wmm_default(sdata);
f0706e82 1561
ae5eb026 1562 if (elems.ht_info_elem && elems.wmm_param &&
46900298 1563 (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&
ab1faead 1564 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ae5eb026 1565 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1566 wk->bss->cbss.bssid,
ae5eb026
JB		 1567 ap_ht_cap_flags);
1568
056508dc
JB		 1569 /* delete work item -- must be before set_associated for PS */
1570 list_del(&wk->list);
1571
60f8b39c
JB		 1572 /* set AID and assoc capability,
1573 * ieee80211_set_associated() will tell the driver */
1574 bss_conf->aid = aid;
1575 bss_conf->assoc_capability = capab_info;
77fdaa12 1576 ieee80211_set_associated(sdata, wk->bss, changed);
f0706e82 1577
15b7b062 1578 /*
b291ba11
JB		 1579 * Start timer to probe the connection to the AP now.
1580 * Also start the timer that will detect beacon loss.
15b7b062 1581 */
b291ba11
JB		 1582 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1583 mod_beacon_timer(sdata);
15b7b062 1584
77fdaa12
JB		 1585 kfree(wk);
1586 return RX_MGMT_CFG80211_ASSOC;
f0706e82
JB		 1587}
1588
1589
98c8fccf
JB		 1590static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
1591 struct ieee80211_mgmt *mgmt,
1592 size_t len,
1593 struct ieee80211_rx_status *rx_status,
1594 struct ieee802_11_elems *elems,
1595 bool beacon)
1596{
1597 struct ieee80211_local *local = sdata->local;
1598 int freq;
c2b13452 1599 struct ieee80211_bss *bss;
98c8fccf 1600 struct ieee80211_channel *channel;
98c8fccf
JB		 1601
1602 if (elems->ds_params && elems->ds_params_len == 1)
1603 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1604 else
1605 freq = rx_status->freq;
1606
1607 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1608
1609 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1610 return;
1611
98c8fccf 1612 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 1613 channel, beacon);
77fdaa12
JB		 1614 if (bss)
1615 ieee80211_rx_bss_put(local, bss);
1616
1617 if (!sdata->u.mgd.associated)
98c8fccf
JB		 1618 return;
1619
c481ec97 1620 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
77fdaa12
JB		 1621 (memcmp(mgmt->bssid, sdata->u.mgd.associated->cbss.bssid,
1622 ETH_ALEN) == 0)) {
c481ec97
S		 1623 struct ieee80211_channel_sw_ie *sw_elem =
1624 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
cc32abd4 1625 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
c481ec97 1626 }
f0706e82
JB		 1627}
1628
1629
f698d856 1630static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
77fdaa12
JB		 1631 struct ieee80211_mgd_work *wk,
1632 struct ieee80211_mgmt *mgmt, size_t len,
f0706e82
JB		 1633 struct ieee80211_rx_status *rx_status)
1634{
15b7b062 1635 struct ieee80211_if_managed *ifmgd;
ae6a44e3
EK		 1636 size_t baselen;
1637 struct ieee802_11_elems elems;
1638
15b7b062
KV		 1639 ifmgd = &sdata->u.mgd;
1640
77fdaa12
JB		 1641 ASSERT_MGD_MTX(ifmgd);
1642
8e7cdbb6
TW		 1643 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
1644 return; /* ignore ProbeResp to foreign address */
1645
ae6a44e3
EK		 1646 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1647 if (baselen > len)
1648 return;
1649
1650 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1651 &elems);
1652
98c8fccf 1653 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e
RR		 1654
1655 /* direct probe may be part of the association flow */
77fdaa12 1656 if (wk && wk->state == IEEE80211_MGD_STATE_PROBE) {
9859b81e
RR		 1657 printk(KERN_DEBUG "%s direct probe responded\n",
1658 sdata->dev->name);
77fdaa12
JB		 1659 wk->tries = 0;
1660 wk->state = IEEE80211_MGD_STATE_AUTH;
1661 WARN_ON(ieee80211_authenticate(sdata, wk) != RX_MGMT_NONE);
9859b81e 1662 }
15b7b062 1663
77fdaa12
JB		 1664 if (ifmgd->associated &&
1665 memcmp(mgmt->bssid, ifmgd->associated->cbss.bssid, ETH_ALEN) == 0 &&
b291ba11
JB		 1666 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1667 IEEE80211_STA_CONNECTION_POLL)) {
1668 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1669 IEEE80211_STA_BEACON_POLL);
4e751843
JB		 1670 mutex_lock(&sdata->local->iflist_mtx);
1671 ieee80211_recalc_ps(sdata->local, -1);
1672 mutex_unlock(&sdata->local->iflist_mtx);
b291ba11
JB		 1673 /*
1674 * We've received a probe response, but are not sure whether
1675 * we have or will be receiving any beacons or data, so let's
1676 * schedule the timers again, just in case.
1677 */
1678 mod_beacon_timer(sdata);
1679 mod_timer(&ifmgd->conn_mon_timer,
1680 round_jiffies_up(jiffies +
1681 IEEE80211_CONNECTION_IDLE_TIME));
4e751843 1682 }
f0706e82
JB		 1683}
1684
d91f36db
JB		 1685/*
1686 * This is the canonical list of information elements we care about,
1687 * the filter code also gives us all changes to the Microsoft OUI
1688 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1689 *
1690 * We implement beacon filtering in software since that means we can
1691 * avoid processing the frame here and in cfg80211, and userspace
1692 * will not be able to tell whether the hardware supports it or not.
1693 *
1694 * XXX: This list needs to be dynamic -- userspace needs to be able to
1695 * add items it requires. It also needs to be able to tell us to
1696 * look out for other vendor IEs.
1697 */
1698static const u64 care_about_ies =
1d4df3a5
JB		 1699 (1ULL << WLAN_EID_COUNTRY) |
1700 (1ULL << WLAN_EID_ERP_INFO) |
1701 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1702 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1703 (1ULL << WLAN_EID_HT_CAPABILITY) |
1704 (1ULL << WLAN_EID_HT_INFORMATION);
d91f36db 1705
f698d856 1706static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1707 struct ieee80211_mgmt *mgmt,
1708 size_t len,
1709 struct ieee80211_rx_status *rx_status)
1710{
d91f36db 1711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1712 size_t baselen;
1713 struct ieee802_11_elems elems;
f698d856 1714 struct ieee80211_local *local = sdata->local;
471b3efd 1715 u32 changed = 0;
d91f36db 1716 bool erp_valid, directed_tim = false;
7a5158ef 1717 u8 erp_value = 0;
d91f36db 1718 u32 ncrc;
77fdaa12
JB		 1719 u8 *bssid;
1720
1721 ASSERT_MGD_MTX(ifmgd);
f0706e82 1722
ae6a44e3
EK		 1723 /* Process beacon from the current BSS */
1724 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1725 if (baselen > len)
1726 return;
1727
d91f36db 1728 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 1729 return;
f0706e82 1730
b291ba11
JB		 1731 /*
1732 * We might have received a number of frames, among them a
1733 * disassoc frame and a beacon...
1734 */
1735 if (!ifmgd->associated)
77fdaa12
JB		 1736 return;
1737
1738 bssid = ifmgd->associated->cbss.bssid;
1739
b291ba11
JB		 1740 /*
1741 * And in theory even frames from a different AP we were just
1742 * associated to a split-second ago!
1743 */
1744 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82
JB		 1745 return;
1746
b291ba11 1747 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180
JM		 1748#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1749 if (net_ratelimit()) {
1750 printk(KERN_DEBUG "%s: cancelling probereq poll due "
1751 "to a received beacon\n", sdata->dev->name);
1752 }
1753#endif
b291ba11 1754 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
4e751843
JB		 1755 mutex_lock(&local->iflist_mtx);
1756 ieee80211_recalc_ps(local, -1);
1757 mutex_unlock(&local->iflist_mtx);
92778180
JM		 1758 }
1759
b291ba11
JB		 1760 /*
1761 * Push the beacon loss detection into the future since
1762 * we are processing a beacon from the AP just now.
1763 */
1764 mod_beacon_timer(sdata);
1765
d91f36db
JB		 1766 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1767 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1768 len - baselen, &elems,
1769 care_about_ies, ncrc);
1770
1771 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 1772 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1773 ifmgd->aid);
d91f36db 1774
30196673
JM		 1775 if (ncrc != ifmgd->beacon_crc) {
1776 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1777 true);
d91f36db 1778
30196673
JM		 1779 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1780 elems.wmm_param_len);
1781 }
fe3fa827 1782
25c9c875 1783 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 1784 if (directed_tim) {
572e0012
KV		 1785 if (local->hw.conf.dynamic_ps_timeout > 0) {
1786 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1787 ieee80211_hw_config(local,
1788 IEEE80211_CONF_CHANGE_PS);
1789 ieee80211_send_nullfunc(local, sdata, 0);
1790 } else {
1791 local->pspolling = true;
1792
1793 /*
1794 * Here is assumed that the driver will be
1795 * able to send ps-poll frame and receive a
1796 * response even though power save mode is
1797 * enabled, but some drivers might require
1798 * to disable power save here. This needs
1799 * to be investigated.
1800 */
1801 ieee80211_send_pspoll(local, sdata);
1802 }
a97b77b9
VN		 1803 }
1804 }
7a5158ef 1805
30196673
JM		 1806 if (ncrc == ifmgd->beacon_crc)
1807 return;
1808 ifmgd->beacon_crc = ncrc;
1809
7a5158ef
JB		 1810 if (elems.erp_info && elems.erp_info_len >= 1) {
1811 erp_valid = true;
1812 erp_value = elems.erp_info[0];
1813 } else {
1814 erp_valid = false;
50c4afb9 1815 }
7a5158ef
JB		 1816 changed |= ieee80211_handle_bss_capability(sdata,
1817 le16_to_cpu(mgmt->u.beacon.capab_info),
1818 erp_valid, erp_value);
f0706e82 1819
d3c990fb 1820
53d6f81c 1821 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
ab1faead 1822 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026
JB		 1823 struct sta_info *sta;
1824 struct ieee80211_supported_band *sband;
1825 u16 ap_ht_cap_flags;
1826
1827 rcu_read_lock();
1828
77fdaa12
JB		 1829 sta = sta_info_get(local, bssid);
1830 if (WARN_ON(!sta)) {
ae5eb026
JB		 1831 rcu_read_unlock();
1832 return;
1833 }
1834
1835 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1836
1837 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1838 elems.ht_cap_elem, &sta->sta.ht_cap);
1839
1840 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1841
1842 rcu_read_unlock();
1843
1844 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
77fdaa12 1845 bssid, ap_ht_cap_flags);
d3c990fb
RR		 1846 }
1847
3f2355cb
LR		 1848 if (elems.country_elem) {
1849 /* Note we are only reviewing this on beacons
1850 * for the BSSID we are associated to */
1851 regulatory_hint_11d(local->hw.wiphy,
1852 elems.country_elem, elems.country_elem_len);
a8302de9
VT		 1853
1854 /* TODO: IBSS also needs this */
1855 if (elems.pwr_constr_elem)
1856 ieee80211_handle_pwr_constr(sdata,
1857 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1858 elems.pwr_constr_elem,
1859 elems.pwr_constr_elem_len);
3f2355cb
LR		 1860 }
1861
471b3efd 1862 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 1863}
1864
46900298 1865ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
f1d58c25 1866 struct sk_buff *skb)
f0706e82 1867{
f698d856 1868 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1869 struct ieee80211_mgmt *mgmt;
1870 u16 fc;
1871
1872 if (skb->len < 24)
46900298 1873 return RX_DROP_MONITOR;
f0706e82
JB		 1874
1875 mgmt = (struct ieee80211_mgmt *) skb->data;
1876 fc = le16_to_cpu(mgmt->frame_control);
1877
1878 switch (fc & IEEE80211_FCTL_STYPE) {
1879 case IEEE80211_STYPE_PROBE_REQ:
1880 case IEEE80211_STYPE_PROBE_RESP:
1881 case IEEE80211_STYPE_BEACON:
f0706e82
JB		 1882 case IEEE80211_STYPE_AUTH:
1883 case IEEE80211_STYPE_ASSOC_RESP:
1884 case IEEE80211_STYPE_REASSOC_RESP:
1885 case IEEE80211_STYPE_DEAUTH:
1886 case IEEE80211_STYPE_DISASSOC:
77fdaa12 1887 case IEEE80211_STYPE_ACTION:
46900298 1888 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
42935eca 1889 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
46900298 1890 return RX_QUEUED;
f0706e82
JB		 1891 }
1892
46900298 1893 return RX_DROP_MONITOR;
f0706e82
JB		 1894}
1895
f698d856 1896static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1897 struct sk_buff *skb)
1898{
77fdaa12 1899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1900 struct ieee80211_rx_status *rx_status;
f0706e82 1901 struct ieee80211_mgmt *mgmt;
77fdaa12
JB		 1902 struct ieee80211_mgd_work *wk;
1903 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 1904 u16 fc;
1905
f0706e82
JB		 1906 rx_status = (struct ieee80211_rx_status *) skb->cb;
1907 mgmt = (struct ieee80211_mgmt *) skb->data;
1908 fc = le16_to_cpu(mgmt->frame_control);
1909
77fdaa12
JB		 1910 mutex_lock(&ifmgd->mtx);
1911
1912 if (ifmgd->associated &&
1913 memcmp(ifmgd->associated->cbss.bssid, mgmt->bssid,
1914 ETH_ALEN) == 0) {
1915 switch (fc & IEEE80211_FCTL_STYPE) {
1916 case IEEE80211_STYPE_BEACON:
1917 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1918 rx_status);
1919 break;
1920 case IEEE80211_STYPE_PROBE_RESP:
1921 ieee80211_rx_mgmt_probe_resp(sdata, NULL, mgmt,
1922 skb->len, rx_status);
1923 break;
1924 case IEEE80211_STYPE_DEAUTH:
1925 rma = ieee80211_rx_mgmt_deauth(sdata, NULL,
1926 mgmt, skb->len);
1927 break;
1928 case IEEE80211_STYPE_DISASSOC:
1929 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1930 break;
1931 case IEEE80211_STYPE_ACTION:
1932 /* XXX: differentiate, can only happen for CSA now! */
1933 ieee80211_sta_process_chanswitch(sdata,
1934 &mgmt->u.action.u.chan_switch.sw_elem,
1935 ifmgd->associated);
1936 break;
1937 }
1938 mutex_unlock(&ifmgd->mtx);
1939
1940 switch (rma) {
1941 case RX_MGMT_NONE:
1942 /* no action */
1943 break;
1944 case RX_MGMT_CFG80211_DEAUTH:
667503dd
JB		 1945 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len,
1946 NULL);
77fdaa12
JB		 1947 break;
1948 case RX_MGMT_CFG80211_DISASSOC:
667503dd
JB		 1949 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len,
1950 NULL);
77fdaa12
JB		 1951 break;
1952 default:
1953 WARN(1, "unexpected: %d", rma);
1954 }
1955 goto out;
1956 }
1957
1958 list_for_each_entry(wk, &ifmgd->work_list, list) {
1959 if (memcmp(wk->bss->cbss.bssid, mgmt->bssid, ETH_ALEN) != 0)
1960 continue;
1961
1962 switch (fc & IEEE80211_FCTL_STYPE) {
1963 case IEEE80211_STYPE_PROBE_RESP:
1964 ieee80211_rx_mgmt_probe_resp(sdata, wk, mgmt, skb->len,
1965 rx_status);
1966 break;
1967 case IEEE80211_STYPE_AUTH:
1968 rma = ieee80211_rx_mgmt_auth(sdata, wk, mgmt, skb->len);
1969 break;
1970 case IEEE80211_STYPE_ASSOC_RESP:
1971 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1972 skb->len, false);
1973 break;
1974 case IEEE80211_STYPE_REASSOC_RESP:
1975 rma = ieee80211_rx_mgmt_assoc_resp(sdata, wk, mgmt,
1976 skb->len, true);
1977 break;
1978 case IEEE80211_STYPE_DEAUTH:
1979 rma = ieee80211_rx_mgmt_deauth(sdata, wk, mgmt,
1980 skb->len);
1981 break;
1982 }
1983 /*
1984 * We've processed this frame for that work, so it can't
1985 * belong to another work struct.
1986 * NB: this is also required for correctness because the
1987 * called functions can free 'wk', and for 'rma'!
1988 */
46900298 1989 break;
77fdaa12
JB		 1990 }
1991
1992 mutex_unlock(&ifmgd->mtx);
1993
1994 switch (rma) {
1995 case RX_MGMT_NONE:
1996 /* no action */
46900298 1997 break;
77fdaa12 1998 case RX_MGMT_CFG80211_AUTH:
cb0b4beb 1999 cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2000 break;
77fdaa12 2001 case RX_MGMT_CFG80211_ASSOC:
cb0b4beb 2002 cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, skb->len);
46900298 2003 break;
8d8b261a
JB		 2004 case RX_MGMT_CFG80211_DEAUTH:
2005 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len, NULL);
2006 break;
77fdaa12
JB		 2007 default:
2008 WARN(1, "unexpected: %d", rma);
f0706e82
JB		 2009 }
2010
77fdaa12 2011 out:
f0706e82
JB		 2012 kfree_skb(skb);
2013}
2014
9c6bd790 2015static void ieee80211_sta_timer(unsigned long data)
f0706e82 2016{
60f8b39c
JB		 2017 struct ieee80211_sub_if_data *sdata =
2018 (struct ieee80211_sub_if_data *) data;
46900298 2019 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2020 struct ieee80211_local *local = sdata->local;
f0706e82 2021
5bb644a0
JB		 2022 if (local->quiescing) {
2023 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2024 return;
2025 }
2026
42935eca 2027 ieee80211_queue_work(&local->hw, &ifmgd->work);
f0706e82
JB		 2028}
2029
9c6bd790
JB		 2030static void ieee80211_sta_work(struct work_struct *work)
2031{
2032 struct ieee80211_sub_if_data *sdata =
46900298 2033 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
9c6bd790 2034 struct ieee80211_local *local = sdata->local;
46900298 2035 struct ieee80211_if_managed *ifmgd;
9c6bd790 2036 struct sk_buff *skb;
77fdaa12
JB		 2037 struct ieee80211_mgd_work *wk, *tmp;
2038 LIST_HEAD(free_work);
2039 enum rx_mgmt_action rma;
2040 bool anybusy = false;
9c6bd790
JB		 2041
2042 if (!netif_running(sdata->dev))
2043 return;
2044
fbe9c429 2045 if (local->scanning)
9c6bd790
JB		 2046 return;
2047
46900298 2048 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
9c6bd790 2049 return;
5bb644a0
JB		 2050
2051 /*
42935eca
LR		 2052 * ieee80211_queue_work() should have picked up most cases,
2053 * here we'll pick the the rest.
5bb644a0 2054 */
42935eca
LR		 2055 if (WARN(local->suspended, "STA MLME work scheduled while "
2056 "going to suspend\n"))
5bb644a0
JB		 2057 return;
2058
46900298 2059 ifmgd = &sdata->u.mgd;
f0706e82 2060
77fdaa12 2061 /* first process frames to avoid timing out while a frame is pending */
46900298 2062 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
9c6bd790
JB		 2063 ieee80211_sta_rx_queued_mgmt(sdata, skb);
2064
77fdaa12
JB		 2065 /* then process the rest of the work */
2066 mutex_lock(&ifmgd->mtx);
2067
b291ba11
JB		 2068 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2069 IEEE80211_STA_CONNECTION_POLL) &&
2070 ifmgd->associated) {
2071 if (time_is_after_jiffies(ifmgd->probe_timeout))
2072 run_again(ifmgd, ifmgd->probe_timeout);
2073 else {
2074 u8 bssid[ETH_ALEN];
2075 /*
2076 * We actually lost the connection ... or did we?
2077 * Let's make sure!
2078 */
2079 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
2080 IEEE80211_STA_BEACON_POLL);
2081 memcpy(bssid, ifmgd->associated->cbss.bssid, ETH_ALEN);
2082 printk(KERN_DEBUG "No probe response from AP %pM"
2083 " after %dms, disconnecting.\n",
2084 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
2085 ieee80211_set_disassoc(sdata);
2086 mutex_unlock(&ifmgd->mtx);
2087 /*
2088 * must be outside lock due to cfg80211,
2089 * but that's not a problem.
2090 */
2091 ieee80211_send_deauth_disassoc(sdata, bssid,
2092 IEEE80211_STYPE_DEAUTH,
2093 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2094 NULL);
2095 mutex_lock(&ifmgd->mtx);
2096 }
2097 }
2098
77fdaa12
JB		 2099 list_for_each_entry(wk, &ifmgd->work_list, list) {
2100 if (wk->state != IEEE80211_MGD_STATE_IDLE) {
2101 anybusy = true;
2102 break;
2103 }
f0706e82
JB		 2104 }
2105
77fdaa12
JB		 2106 ieee80211_recalc_idle(local);
2107
2108 if (!anybusy) {
2109 mutex_unlock(&ifmgd->mtx);
2110
2111 if (test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request))
42935eca
LR		 2112 ieee80211_queue_delayed_work(&local->hw,
2113 &local->scan_work,
2114 round_jiffies_relative(0));
9c6bd790 2115 return;
77fdaa12 2116 }
d6f2da5b 2117
77fdaa12 2118 list_for_each_entry_safe(wk, tmp, &ifmgd->work_list, list) {
ca386f31
JB		 2119 if (time_is_after_jiffies(wk->timeout)) {
2120 /*
2121 * This work item isn't supposed to be worked on
2122 * right now, but take care to adjust the timer
2123 * properly.
2124 */
2125 run_again(ifmgd, wk->timeout);
77fdaa12 2126 continue;
ca386f31 2127 }
5cff20e6 2128
77fdaa12
JB		 2129 switch (wk->state) {
2130 default:
2131 WARN_ON(1);
2132 /* fall through */
2133 case IEEE80211_MGD_STATE_IDLE:
2134 /* nothing */
2135 rma = RX_MGMT_NONE;
2136 break;
2137 case IEEE80211_MGD_STATE_PROBE:
2138 rma = ieee80211_direct_probe(sdata, wk);
2139 break;
2140 case IEEE80211_MGD_STATE_AUTH:
2141 rma = ieee80211_authenticate(sdata, wk);
2142 break;
2143 case IEEE80211_MGD_STATE_ASSOC:
2144 rma = ieee80211_associate(sdata, wk);
2145 break;
2146 }
2147
2148 switch (rma) {
2149 case RX_MGMT_NONE:
2150 /* no action required */
2151 break;
2152 case RX_MGMT_CFG80211_AUTH_TO:
2153 case RX_MGMT_CFG80211_ASSOC_TO:
2154 list_del(&wk->list);
2155 list_add(&wk->list, &free_work);
2156 wk->tries = rma; /* small abuse but only local */
2157 break;
2158 default:
2159 WARN(1, "unexpected: %d", rma);
2160 }
2161 }
2162
2163 mutex_unlock(&ifmgd->mtx);
2164
2165 list_for_each_entry_safe(wk, tmp, &free_work, list) {
2166 switch (wk->tries) {
2167 case RX_MGMT_CFG80211_AUTH_TO:
2168 cfg80211_send_auth_timeout(sdata->dev,
cb0b4beb 2169 wk->bss->cbss.bssid);
77fdaa12
JB		 2170 break;
2171 case RX_MGMT_CFG80211_ASSOC_TO:
cb0b4beb
JB		 2172 cfg80211_send_assoc_timeout(sdata->dev,
2173 wk->bss->cbss.bssid);
77fdaa12
JB		 2174 break;
2175 default:
2176 WARN(1, "unexpected: %d", wk->tries);
2177 }
2178
2179 list_del(&wk->list);
2180 kfree(wk);
9c6bd790 2181 }
77fdaa12
JB		 2182
2183 ieee80211_recalc_idle(local);
f0706e82
JB		 2184}
2185
b291ba11
JB		 2186static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2187{
2188 struct ieee80211_sub_if_data *sdata =
2189 (struct ieee80211_sub_if_data *) data;
2190 struct ieee80211_local *local = sdata->local;
2191
2192 if (local->quiescing)
2193 return;
2194
42935eca 2195 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
b291ba11
JB		 2196}
2197
2198static void ieee80211_sta_conn_mon_timer(unsigned long data)
2199{
2200 struct ieee80211_sub_if_data *sdata =
2201 (struct ieee80211_sub_if_data *) data;
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 struct ieee80211_local *local = sdata->local;
2204
2205 if (local->quiescing)
2206 return;
2207
42935eca 2208 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2209}
2210
2211static void ieee80211_sta_monitor_work(struct work_struct *work)
2212{
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.monitor_work);
2216
2217 ieee80211_mgd_probe_ap(sdata, false);
2218}
2219
9c6bd790
JB		 2220static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2221{
ad935687 2222 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
b291ba11
JB		 2223 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
2224 IEEE80211_STA_CONNECTION_POLL);
ad935687 2225
b291ba11 2226 /* let's probe the connection once */
42935eca 2227 ieee80211_queue_work(&sdata->local->hw,
b291ba11
JB		 2228 &sdata->u.mgd.monitor_work);
2229 /* and do all the other regular work too */
42935eca 2230 ieee80211_queue_work(&sdata->local->hw,
46900298 2231 &sdata->u.mgd.work);
ad935687 2232 }
9c6bd790 2233}
f0706e82 2234
5bb644a0
JB		 2235#ifdef CONFIG_PM
2236void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2237{
2238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2239
2240 /*
2241 * we need to use atomic bitops for the running bits
2242 * only because both timers might fire at the same
2243 * time -- the code here is properly synchronised.
2244 */
2245
2246 cancel_work_sync(&ifmgd->work);
2247 cancel_work_sync(&ifmgd->beacon_loss_work);
2248 if (del_timer_sync(&ifmgd->timer))
2249 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2250
2251 cancel_work_sync(&ifmgd->chswitch_work);
2252 if (del_timer_sync(&ifmgd->chswitch_timer))
2253 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11
JB		 2254
2255 cancel_work_sync(&ifmgd->monitor_work);
2256 /* these will just be re-established on connection */
2257 del_timer_sync(&ifmgd->conn_mon_timer);
2258 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2259}
2260
2261void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2262{
2263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2264
2265 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2266 add_timer(&ifmgd->timer);
2267 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2268 add_timer(&ifmgd->chswitch_timer);
2269}
2270#endif
2271
9c6bd790
JB		 2272/* interface setup */
2273void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2274{
46900298 2275 struct ieee80211_if_managed *ifmgd;
988c0f72 2276
46900298
JB		 2277 ifmgd = &sdata->u.mgd;
2278 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
b291ba11 2279 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2280 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
04de8381 2281 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
46900298 2282 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2283 (unsigned long) sdata);
b291ba11
JB		 2284 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2285 (unsigned long) sdata);
2286 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2287 (unsigned long) sdata);
46900298 2288 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2289 (unsigned long) sdata);
46900298 2290 skb_queue_head_init(&ifmgd->skb_queue);
9c6bd790 2291
77fdaa12
JB		 2292 INIT_LIST_HEAD(&ifmgd->work_list);
2293
46900298 2294 ifmgd->capab = WLAN_CAPABILITY_ESS;
ab1faead 2295 ifmgd->flags = 0;
176be728 2296 if (sdata->local->hw.queues >= 4)
46900298 2297 ifmgd->flags |= IEEE80211_STA_WMM_ENABLED;
bbbdff9e 2298
77fdaa12 2299 mutex_init(&ifmgd->mtx);
f0706e82
JB		 2300}
2301
77fdaa12
JB		 2302/* scan finished notification */
2303void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2304{
77fdaa12 2305 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2306
77fdaa12
JB		 2307 /* Restart STA timers */
2308 rcu_read_lock();
2309 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2310 ieee80211_restart_sta_timer(sdata);
2311 rcu_read_unlock();
2312}
60f8b39c 2313
77fdaa12
JB		 2314int ieee80211_max_network_latency(struct notifier_block *nb,
2315 unsigned long data, void *dummy)
2316{
2317 s32 latency_usec = (s32) data;
2318 struct ieee80211_local *local =
2319 container_of(nb, struct ieee80211_local,
2320 network_latency_notifier);
1fa6f4af 2321
77fdaa12
JB		 2322 mutex_lock(&local->iflist_mtx);
2323 ieee80211_recalc_ps(local, latency_usec);
2324 mutex_unlock(&local->iflist_mtx);
dfe67012 2325
77fdaa12 2326 return 0;
9c6bd790
JB		 2327}
2328
77fdaa12
JB		 2329/* config hooks */
2330int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2331 struct cfg80211_auth_request *req)
9c6bd790 2332{
46900298 2333 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2334 const u8 *ssid;
2335 struct ieee80211_mgd_work *wk;
2336 u16 auth_alg;
9c6bd790 2337
77fdaa12
JB		 2338 switch (req->auth_type) {
2339 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2340 auth_alg = WLAN_AUTH_OPEN;
2341 break;
2342 case NL80211_AUTHTYPE_SHARED_KEY:
2343 auth_alg = WLAN_AUTH_SHARED_KEY;
2344 break;
2345 case NL80211_AUTHTYPE_FT:
2346 auth_alg = WLAN_AUTH_FT;
2347 break;
2348 case NL80211_AUTHTYPE_NETWORK_EAP:
2349 auth_alg = WLAN_AUTH_LEAP;
2350 break;
2351 default:
2352 return -EOPNOTSUPP;
60f8b39c 2353 }
77fdaa12
JB		 2354
2355 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2356 if (!wk)
9c6bd790 2357 return -ENOMEM;
77fdaa12
JB		 2358
2359 wk->bss = (void *)req->bss;
2360
2361 if (req->ie && req->ie_len) {
2362 memcpy(wk->ie, req->ie, req->ie_len);
2363 wk->ie_len = req->ie_len;
9c6bd790 2364 }
77fdaa12 2365
fffd0934
JB		 2366 if (req->key && req->key_len) {
2367 wk->key_len = req->key_len;
2368 wk->key_idx = req->key_idx;
2369 memcpy(wk->key, req->key, req->key_len);
2370 }
2371
77fdaa12
JB		 2372 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
2373 memcpy(wk->ssid, ssid + 2, ssid[1]);
2374 wk->ssid_len = ssid[1];
2375
2376 wk->state = IEEE80211_MGD_STATE_PROBE;
2377 wk->auth_alg = auth_alg;
48531847 2378 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2379
2380 /*
2381 * XXX: if still associated need to tell AP that we're going
2382 * to sleep and then change channel etc.
2383 */
2384 sdata->local->oper_channel = req->bss->channel;
2385 ieee80211_hw_config(sdata->local, 0);
2386
2387 mutex_lock(&ifmgd->mtx);
2388 list_add(&wk->list, &sdata->u.mgd.work_list);
2389 mutex_unlock(&ifmgd->mtx);
2390
42935eca 2391 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
9c6bd790 2392 return 0;
60f8b39c
JB		 2393}
2394
77fdaa12
JB		 2395int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2396 struct cfg80211_assoc_request *req)
f0706e82 2397{
77fdaa12
JB		 2398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2399 struct ieee80211_mgd_work *wk, *found = NULL;
2400 int i, err;
f0706e82 2401
77fdaa12
JB		 2402 mutex_lock(&ifmgd->mtx);
2403
2404 list_for_each_entry(wk, &ifmgd->work_list, list) {
2405 if (&wk->bss->cbss == req->bss &&
2406 wk->state == IEEE80211_MGD_STATE_IDLE) {
2407 found = wk;
2408 break;
2409 }
2410 }
2411
2412 if (!found) {
2413 err = -ENOLINK;
2414 goto out;
2415 }
2416
2417 list_del(&found->list);
2418
2419 wk = krealloc(found, sizeof(*wk) + req->ie_len, GFP_KERNEL);
2420 if (!wk) {
2421 list_add(&found->list, &ifmgd->work_list);
2422 err = -ENOMEM;
2423 goto out;
2424 }
2425
2426 list_add(&wk->list, &ifmgd->work_list);
2427
2428 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
2429
2430 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2431 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2432 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2433 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2434 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2435
2436 sdata->local->oper_channel = req->bss->channel;
2437 ieee80211_hw_config(sdata->local, 0);
2438
2439 if (req->ie && req->ie_len) {
2440 memcpy(wk->ie, req->ie, req->ie_len);
2441 wk->ie_len = req->ie_len;
2442 } else
2443 wk->ie_len = 0;
2444
2445 if (req->prev_bssid)
2446 memcpy(wk->prev_bssid, req->prev_bssid, ETH_ALEN);
2447
2448 wk->state = IEEE80211_MGD_STATE_ASSOC;
2449 wk->tries = 0;
48531847 2450 wk->timeout = jiffies; /* run right away */
77fdaa12
JB		 2451
2452 if (req->use_mfp) {
2453 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2454 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2455 } else {
2456 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2457 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2458 }
2459
2460 if (req->crypto.control_port)
2461 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2462 else
2463 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2464
42935eca 2465 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.work);
77fdaa12
JB		 2466
2467 err = 0;
2468
2469 out:
2470 mutex_unlock(&ifmgd->mtx);
2471 return err;
f0706e82
JB		 2472}
2473
77fdaa12 2474int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2475 struct cfg80211_deauth_request *req,
2476 void *cookie)
f0706e82 2477{
46900298 2478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12
JB		 2479 struct ieee80211_mgd_work *wk;
2480 const u8 *bssid = NULL;
f0706e82 2481
77fdaa12
JB		 2482 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
2483 sdata->dev->name, req->reason_code);
2484
2485 mutex_lock(&ifmgd->mtx);
2486
2487 if (ifmgd->associated && &ifmgd->associated->cbss == req->bss) {
2488 bssid = req->bss->bssid;
b291ba11 2489 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2490 } else list_for_each_entry(wk, &ifmgd->work_list, list) {
2491 if (&wk->bss->cbss == req->bss) {
2492 bssid = req->bss->bssid;
2493 list_del(&wk->list);
2494 kfree(wk);
2495 break;
2496 }
2497 }
f0706e82 2498
8d8b261a
JB		 2499 /*
2500 * cfg80211 should catch this ... but it's racy since
2501 * we can receive a deauth frame, process it, hand it
2502 * to cfg80211 while that's in a locked section already
2503 * trying to tell us that the user wants to disconnect.
2504 */
2505 if (!bssid) {
77fdaa12 2506 mutex_unlock(&ifmgd->mtx);
46900298 2507 return -ENOLINK;
77fdaa12
JB		 2508 }
2509
2510 mutex_unlock(&ifmgd->mtx);
2511
2512 ieee80211_send_deauth_disassoc(sdata, bssid,
667503dd
JB		 2513 IEEE80211_STYPE_DEAUTH, req->reason_code,
2514 cookie);
f0706e82 2515
f0706e82
JB		 2516 return 0;
2517}
84363e6e 2518
77fdaa12 2519int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
667503dd
JB		 2520 struct cfg80211_disassoc_request *req,
2521 void *cookie)
9c6bd790 2522{
77fdaa12 2523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2524
77fdaa12
JB		 2525 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
2526 sdata->dev->name, req->reason_code);
10f644a4 2527
77fdaa12 2528 mutex_lock(&ifmgd->mtx);
10f644a4 2529
8d8b261a
JB		 2530 /*
2531 * cfg80211 should catch this ... but it's racy since
2532 * we can receive a disassoc frame, process it, hand it
2533 * to cfg80211 while that's in a locked section already
2534 * trying to tell us that the user wants to disconnect.
2535 */
2536 if (&ifmgd->associated->cbss != req->bss) {
77fdaa12
JB		 2537 mutex_unlock(&ifmgd->mtx);
2538 return -ENOLINK;
2539 }
2540
b291ba11 2541 ieee80211_set_disassoc(sdata);
77fdaa12
JB		 2542
2543 mutex_unlock(&ifmgd->mtx);
10f644a4 2544
77fdaa12 2545 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
667503dd
JB		 2546 IEEE80211_STYPE_DISASSOC, req->reason_code,
2547 cookie);
10f644a4
JB		 2548 return 0;
2549}
Clone of davem's net-next-2.6 tree